HOT STAMPING METHOD AND DEVICE

专利摘要:
HOT STAMPING METHOD AND DEVICE. The present invention relates to a method for hot stamping at least part of at least one strip-shaped hot foil metal (10, 20) on a strip-shaped substrate (30), as well as a corresponding hot stamping device. The substrate (30) to be stamped is placed in contact with a metal stamping sheet (10, 20) of at least one metal stamping sheet (10, 20). The substrate (30) and the metal embossing sheet (10.20) located there are guided along the periphery of a first heated embossing roller in which, in a first embossing, a first embossing layer is embossed on the substrate (30 ). The substrate stamped once (30) is guided away from the first stamping roll and again brought into contact with it or an additional stamping foil (10, 20) of at least one stamping foil (10, 20) after the first stamping roll in the direction of travel (33) of the substrate (30). The once-stamped substrate (30) and the stamping foil (10, 20) located therein are guided along the periphery 20 of a second heated stamping roll in which, in a second stamping, a second stamping layer is stamped at the (...).
公开号:BR112013029797B1
申请号:R112013029797-2
申请日:2012-05-04
公开日:2020-11-24
发明作者:Jochen Wening；Peter M0Hlfelder；Klaus Pforte
申请人:Leonhard Kurz Stiftung & Co. Kg；
IPC主号:

专利说明:

[0001] The present invention relates to a hot stamping method and device.
[0002] EP 0 089 494 A2 describes a method of stamping flexible blankets by means of hot foil stamping sheets in the form of a strip. To increase the operating speed, the blanket with the hot stamping foil is guided a greater distance along a heated surface of a support body and the blanket and the hot stamping foil are pressed together against the heated surface of the support body by several pressure rollers arranged at a distance from one another along the heated surface. This makes it possible to obtain at least a five-fold increase in operating speed. A device for carrying out the method is characterized by the arrangement of a roll cage which is formed so that the rollers can be gradually applied to a stamping roll progressively from the inside out. The stamping roller is driven according to the invention through a coupling with varying torque, for example, a coupling of magnetic particles or through an electronic torque control, in particular by means of an electric shaft.
[0003] The purpose of the invention is to provide an improved method of hot stamping and a corresponding device.
[0004] The objective is achieved by a method of hot stamping at least part of at least one metal sheet of hot stamping in the form of a strip on a substrate in the form of a strip, in which the substrate to be stamped is placed in contact with a stamping foil of at least one stamping foil, the substrate and the stamping foil located there are guided along the periphery of a first heated stamping roll in which, in a first stamping, the substrate and the metal embossing foil located there are pressed against each other and against the heated surface of the first embossing roller by at least one first pressure roller arranged on the periphery of the first embossing roller and a first embossing layer is embossed on the substrate, the once printed substrate is guided away from the first printing roll and is again brought into contact with the same metal printing sheet or an additional at least one foil stamping foil after the first foil stamping in relation to the [in] direction of travel of the substrate, the foil stamped once and the foil stamping foil located therein are guided along the periphery of a second foil heated stamping in which, in a second stamping, the substrate and the metallic stamping foil located therein are pressed against each other and against the heated surface of the second stamping roller by at least one second pressure roller disposed on the periphery from the second embossing roll and a second embossing layer is embossed on the substrate, and the embossed substrate twice is guided away from the second embossing roll. The purpose is further achieved by a hot stamping device, which comprises a substrate feeder, through which a strip-shaped substrate to be stamped can be fed; at least one strip guide, through which at least one strip hot-stamped metal sheet can be placed in contact with the fed substrate; a first stamping station with a first heated stamping roll and at least a first pressure roll, disposed on the periphery of the first stamping roll, through which the substrate and the stamping foil located on that of at least one sheet embossing metal can be guided along the periphery of the first embossing roll and thus at least part of the embossing foil that is located on the substrate can be embossed on the substrate in the form of a first embossing layer; a second embossing station disposed after the first embossing station in relation to the direction of travel of the substrate with a second heated embossing roller and at least a second pressure roller, disposed on the periphery of the second embossing roller, through which the substrate stamped once and a stamping foil that is located on that of at least one stamping foil can be guided along the periphery of the second stamping roll and thereby at least part of the stamping foil that lies on the substrate can be stamped onto the substrate in the form of a second stamping layer; and a substrate distribution unit, through which the twice-stamped substrate can be removed from the device.
[0005] The method and the device are suitable for stamping hot security elements on a substrate mat, in particular a paper mat to produce bank notes, in a high-speed process, for example, at a speed in the range of 1 m / min at 500 m / min, in particular 80 m / min at 200 m / min.
[0006] The invention is based on a roll design, that is, a roll to roll production method: a substrate blanket is unrolled from a feed roll, guided through the device in a single pass, to be stamped with embossing layers by means of at least one embossing foil, in a first embossing which is carried out at the first embossing station, and in a second embossing which is carried out at the second embossing station, and finally rolled up in a storage roll. In addition to stamping, the substrate can also be supplied with additional applications on the device or subjected to additional treatments, such as printing with printing layers, the provision of window openings, irradiation, moistening.
[0007] At least one metal embossing sheet may comprise two different metal embossing sheets in which, in the first embossing, a first metal embossing sheet of the two different embossing metal sheets is at least partially embossed on the substrate, thereby the first embossing layer is formed on the substrate, and in the second embossing a second embossing metal sheet from the two different embossing metal sheets is at least partially embossed on the substrate, thereby a second embossing layer is formed on the substrate.
[0008] Alternatively, it is possible that at least one embossing foil comprises a single embossing foil in which, in the first embossing, the embossing foil is partially embossed on the substrate, thereby forming a first embossing layer on the substrate, and in the second embossing, the remainder of the embossing foil left behind after the first embossing is at least partially embossed on the substrate, thereby a second embossing layer is formed on the substrate.
[0009] At least one metal foil can be formed as a metal transfer sheet having a metal transport sheet and a transfer layer can be separated from it, preferably by means of heat and transferred on the substrate. In this case, after stamping, only the transfer layer remains on the substrate in the form of a stamping layer, while the metal transport sheet is separated from the transfer layer. If a metallic foil formed as the transfer metallic foil is used for first and / or second embossing, only part of the metallic embossing sheet is embossed on the substrate, that is, the transfer layer, in the respective embossing.
[0010] At least one metallic stamping foil can be formed as a laminating foil with an upper layer, which has a metal transport foil and an upper layer, for example, a decorative layer, as well as an adhesive layer, in heat-activated, which are arranged together in the form of a stamping layer on the substrate. At least one metal foil can be formed as a metal foil without a top layer, which is arranged on the substrate in the form of a foil. If a stamping foil formed as a laminating foil is used for the first and / or second stamping, the entire stamping foil is stamped onto the substrate in the respective stamping.
[0011] A metallic metal sheet can serve as the metal transport sheet, for example, made of polyester, polyethylene terephthalate (= PET), polyethylene naphthalate (= PEN), polyethylene (= PE), polypropylene (= PP ) or polycarbonate (= PC), preferably with a thickness of 6 pm to 125 pm.
[0012] On its side facing the substrate, the foil stamping foil preferably has a heat-activated adhesive layer, through which at least part of the foil stamping foil, that is, the stamping layer, or the entire stamping foil is attached to the substrate. Furthermore, it is possible that on its side facing out from the substrate, the embossing layer or the embossing foil has a print receiving layer, this improves the embossing layer or embossing foil properties in relation to the overprint capability, that is, the adhesion of printing inks to the stamping layer or the stamping foil.
[0013] It is possible that, in the stamping procedure, the transfer layer of a stamping metal sheet formed as the transfer metal sheet is stamped on the substrate along the entire surface, in the form of a strip, preferably , which extends over the entire panel, as is the case, for example, with strips of foil of 5.10 and 20 euro banknotes from the first series of euro banknotes. It is also possible that, in the embossing procedure, the transfer layer of a embossing foil formed as the transfer foil is partially embossed on the substrate, in the form of a locally limited foil element, for example, with a round, oval or square outline, as is the case, for example, with the 50,100,200 and 500 euro banknote sheet element of the first series of euro banknotes.
[0014] It is also possible for the metal stamping foil to be a transfer metal foil with hot-stamped labels, as described, for example, in WO 2010/072 339 A2. This metal transfer sheet comprises a base metal sheet that has a first metal transport sheet and a single or multiple layer decal layer that can be separated from the first metal transport sheet. A second metal transport sheet is applied to the surface of the first metal transport sheet which faces away from the decal layer by means of a first adhesive layer, so that the first adhesive layer is disposed between the first metal transport sheet and the second metallic transport sheet. The first adhesive layer is activated in a first area that covers at least partially at least a first partial area of the base metal sheet and, in the meantime, not activated, not supplied, only partially supplied, or deactivated in a second area adjacent to that area. The first metal transport sheet is then at least partially separated along the boundary line that defines at least a first partial area and separates at least a first partial area from a second partial area of the base metal sheet. A second part of the metal base sheet comprising the second partial area is removed from the second metal transport sheet, while in at least one first partial area, the metal base sheet adheres to the second metal transport sheet due to the first adhesive layer activated, and a first part of the base metal sheet comprising at least a first partial area remains on the second transport metal sheet. The decal layer of the first part of the base metal sheet that remains on the second metal transport sheet, thus forms transferable labels with its own metal transport sheet, that is, the first metal transport sheet, which is kept in an auxiliary transport metal sheet, that is, the second transport metal sheet and, from there, stamped on a substrate or separated in a stamping procedure. In the case of a circular outline, these transferable labels are referred to as "pills". With this metallic embossing sheet, it is possible to provide a security element that, by means of a conventional transfer procedure, can be transferred over a security document, for example, a bank note or an ID document, and that prevents the "fraying" due to uncontrolled tearing of the decal layer in the edge area of the transferred multilayer body (ID = Identification). The "pills" can be used in particular to close a window opening on a substrate.
[0015] The foil may have on its upper side a print receiving layer that improves the properties of the foil in relation to the ability to overprint, that is, the adhesion of printing inks.
[0016] Any material in the form of a blanket can serve as a substrate, that material withstands the stresses, in particular mechanical, that arise during stamping in the roll to roll method. In practice, fiber substrates or polymer sheet metal substrates are mainly involved. Single-layer or multi-layer fiber substrates such as paper or cotton, laminated or extruded substrates made of a combination of natural fibrous material (eg paper, cotton) and plastic, eg a composite of several layers of paper or fibers and plastic, as well as single- or multi-layer plastic substrates are particularly suitable as a bank note substrate. A known paper-plastic combination is Durasafe® banknote paper from Landqart AG, Switzerland. Cotton-plastic banknote combinations are provided, for example, by Giesecke & Devrient GmbH, Germany. A known plastic substrate is the substrate Guardian® note paper from Securency International Pty Ltd., Australia, and Innovia Films, UK.
[0017] The substrate mat is divided into a plurality of identical segments, also called panels, which are arranged on the substrate mat in bottlenecks along the direction of travel of the substrate and rows transversely to the direction of travel of the substrate. A panel can be, for example, in the form of a bank note, a sheet of paper or an identity page. Dividing the substrate mat into panels is a standard procedure in printing technology to make optimal use of the available substrate mat to form a large number of identical printed products.
[0018] Depending on its width, for example, one or two meters, the substrate blanket has a specific number of adjacent panel bottlenecks, for example, three to eight bottlenecks. A specific number of embossing paths can be allocated to each panel choke, that is, a specific number of embossing layers that will be applied to each panel.
[0019] In the case of conventional embossing machines, the minimum distance between two embossing paths is in the range of approximately 100 mm for structural reasons. This is due to the dimensions of the stamping foil traction units transversely to the direction of travel of the substrate, that is, the width of the strip guides, rollers and other components that guide the stamping foils during stamping and in particular exercise a tensile force on the embossing foil to keep the embossing foil tense and / or able to adjust the longitudinal position of the embossing foil to a small extent by means of the tensile force. The foil traction units have a specific minimum width, determined by the mechanism or the motor, etc., whose limit is the minimum distance between two embossing paths and does not allow the adjacent embossing layers to be embossed on the substrate mat substantially less distance. Even in the case of an arrangement of adjacent sheet metal pull units displaced in the direction of travel of the substrate, it is not possible to substantially reduce the minimum distance between two embossing paths.
[0020] With conventional stamping machines based on sheet or roll design, and with only one stamping station, if it is desired to carry out numerous stamping operations on the substrate, that is, a sheet or a substrate mat, which exceeds the maximum number of embossing paths possible in one pass, as described above, after a first embossing procedure, the substrate must be guided through the same machine again in a second embossing pass. Due to these two passes, the final processing speed, that is, the rate of production of final products, that is, stamped substrate, is reduced by at least 50%.
[0021] A disadvantage of these various passes, in addition to the very low processing speed and the modification operations that can be required on the single machine, is the necessary temporary storage of the substrate which, in the case of banknote production, is normally present under the form of paper or made of other natural fiber substrates among those mentioned above. Paper or other "live" natural fiber substrates, that is, change with environmental conditions such as humidity and atmospheric temperature. During temporary storage between the two passes, the paper thus arrives in a state that cannot be controlled with more attention, which is different from that before the first printing. Thus, the second printing cannot be performed under the same conditions as the first printing. The machine may have to be adjusted to different paper properties, this takes time. However, at the same time that it has different properties, the paper has different dimensions, because, depending on the environmental conditions, the paper curls minimally, particularly in a non-linear way in all spatial directions. This also means that there may be a reduction in accuracy such as positional accuracy or registration between the first and second printing or between the second printing and the paper.
[0022] Unlike conventional stamping machines that are based on sheet or roll design and have only a single stamping station, the disadvantages mentioned above do not occur with the present invention.
[0023] Due to the multiple uninterrupted printing on two printing stations arranged consecutively, that is, "line production", with the present invention, it is possible to obtain a significant increase in the process speed, that is, a significant increase in the rate of output of final products, that is, finished stamped substrate, compared to the conventional double pass system.
[0024] Due to the fast sequence of time, in the range of seconds, of the two printing steps, during the second printing almost the same printing conditions prevail as during the first printing or there is a very precise knowledge of the current properties of the paper, due the fact that environmental conditions vary only insignificantly between the first and the second printing. Based on knowledge of the properties of the paper before the first printing and only on the slight change in the paper since the first printing, for example, due to humidity, the second printing can be precisely adjusted to the known conditions. With the present invention, a possibly time-consuming adjustment of the printing conditions to extremely altered and unknown paper properties is thus dispensed with. At the same time, there is an increase in accuracy between the first and the second stamping.
[0025] According to the invention, the substrate mat and the embossing foil located therein are guided at a greater distance along the heated surface of the embossing roll, and the substrate mat and embossing foil together They are pressed against each other and against the heated surface of the stamping roller by several pressure rollers arranged at a distance from each other along the heated surface. Thus, several "bottlenecks" are provided consecutively, through which the substrate blanket with the foil stamping foil passes, in which in these bottlenecks the foil stamping foil is in each case compressed, by a pressure roller, against the foil blanket. substrate to be decorated. The advantage of this stamping station design, as described, for example, in EP 0 089 494 A2 and WO 2005/120 832 A1, is that the substrate mat with the stamping foil remains constantly heated in the path between the individual strangles and therefore, there is no cooling in the intermediate space between the different pressure rollers. In this way, it is possible to achieve a significant operating speed greater than 150 m / min. since the cooling of the substrate mat and the foil stamping does not occur between the individual pressure rollers, there is also no risk of distortion of the decal image. With this arrangement, not only is a significant operating speed achieved, but at the same time a high quality of printing.
[0026] Advantageous embodiments of the invention are described in the dependent claims.
[0027] It is particularly preferred that, during the first and / or second embossing, the substrate and the embossing foil located on the substrate are pressed against each other and against the heated surface of the first embossing roll by at least two rollers. pressure arranged around the stamping roller at a distance from each other. A significant increase in operating speed is thus possible, as the surface area on which pressure and heat act on the stamping foil guided along the periphery of the stamping roller and located on the substrate is increased. Due to the increased surface area, the time in which pressure and heat act on the embossing foil is also extended, and in particular the adhesive layer and optionally a peeling layer of the embossing foil can thus be sufficiently activated, in particular to obtain a particularly satisfactory adhesion of the embossing foil to the substrate and / or a particularly satisfactory detachment of the transfer layer from a embossing foil formed as the transfer foil.
[0028] In this context, this is a preferred development of the device according to the invention, if the first printing station comprises at least two first pressure rollers, arranged around the first printing roll [comprises] at a distance from each other others, through which the substrate and the foil stamping foil located on that of at least one foil foil foil, can be guided along the periphery of the first foil foil and thus at least part of the foil foil stamping located in the substrate can be stamped onto the substrate in the form of the first stamping layer and / or if the second stamping station comprises at least two second pressure rollers, arranged around the second stamping roll [comprises] at a distance from each other , through which the substrate stamped once and the stamping foil located on that of at least one stamping foil can be guided to the l on the periphery of the second embossing roll and thus at least part of the embossing foil located on the substrate can be embossed on the substrate in the form of the second embossing layer.
[0029] According to a preferred development of the invention, the substrate is printed with at least one printing layer before the first printing and / or between the first and the second printing and / or after the second printing. The printing layer can be arranged between the substrate and the first printing layer and / or between the first and the second printing layer and / or in the second printing layer. It is preferred that the hot stamping device for this purpose comprises at least one printing mechanism arranged before the first stamping station and / or between the first and the second stamping station in relation to the direction of travel of the substrate and / or after the second printing station in relation to the direction of travel of the substrate, to apply a printing layer to the substrate. The printing mechanisms for printing layers of ink or functional in offset printing, screen printing, engraving printing or inkjet printing can be arranged in any position and, preferably, independently of the printing stations within the hot printing device , that is, between an optional take-up and take-out unit, to print the substrate and / or a stamped stamping layer between stamping procedures.
[0030] According to a preferred development of the invention, at least one printing layer is arranged in an area that will be embossed and / or in an embossed area of the embossed substrate once and / or twice. With the various printing stations according to the invention, it is now possible that the first printing layer is not only sub-printed on the substrate, that is, a printing layer is applied to the substrate before the first printing, but also over-printed, that is , a printing layer is applied to the first printing layer after the first printing, and the printing layer applied to the first printing layer is then overprinted, for example, to seal the printing layer. It is also possible to overprint the second embossing layer again. Any sandwiched structures of printing layers and embossing layers are thus possible, for example, the printing layer / embossing layer / printing layer / embossing layer / layer structure printing layer, in which their Precision registration interaction preferably produces new optical and / or functional effects.
[0031] A decal or security print, visible or invisible (IR- / UV-fluorescent) can be applied as the printing layer, for example, a strip of Iriodin® to produce a pearling effect depending on the viewing angle. Functional layers can also be applied as the printing layer, that is, initiator layers, adhesive layers, adhesion promoting layers, print receiving layers, dust repellent layers, impregnation layers, protective varnish layers, replication, effect pigment layers, etc.
[0032] According to a preferred development of the invention, the substrate is rotated in a rotating station between the first and the second printing. It is preferred that the hot stamping device for this purpose comprises a rotation station arranged between the first and second stamping station to rotate the substrate. The rotation station can be formed as a rotation bar. In the case of an activated rotation station, although the stamping rollers rotate in the same direction, the first and second stamping can take place on opposite sides of the substrate. A first stamping occurs on a first side of the substrate and a second stamping on a second side of the substrate opposite the first side. If the rotation station is deactivated or bypassed, the second printing is carried out on the same side as the first printing.
[0033] It is also possible that the first and second stamping layers are stamped on opposite sides of the substrate, in which a rotation station is used. In this case, the first and second stamping rollers rotate in opposite directions.
[0034] According to a preferred development of the invention, at least one window opening is formed on the substrate before the first printing and / or between the first and the second printing and / or after the second printing. It is preferred that the hot stamping device for this purpose comprises a unit for forming at least one window opening in the substrate arranged before the first stamping station and / or between the first and the second stamping station in relation to the direction of course of the substrate and / or after the second printing station in relation to the direction of travel of the substrate. It has been shown to be advantageous that the unit for producing at least one window opening is formed by a drilling unit, in particular a rotating drill cylinder, a laser cutting unit or a waterjet cutting unit. The distances between the individual window openings formed in the substrate are, for example, provided using a drill cylinder and continuously repeated around the periphery of the drill cylinder. The position of the drill cylinder and its speed of rotation can be controlled. However, it is possible that a non-rotating drilling tool is used. It is possible that the window openings are already introduced into the substrate during the production of the substrate, in particular during the production of paper by a corresponding design of the paper screen. Such window openings generally have characteristic frayed edges, depending on the nature of the substrate material. These window openings can be completely or partially drilled at the top using the drilling unit.
[0035] According to a preferred development of the invention, before the first printing and / or between the first and the second printing, a registration mark is printed, and / or a control opening is formed, on the substrate and a positioning of the the first stamping layer and / or the second stamping layer along the direction of travel of the substrate, that is, in the longitudinal register, is controlled using the registration mark or the control opening. The registration mark can also be a watermark present on the substrate that was produced during the production of the substrate. The registration mark can also be formed from a combination of registration mark and / or watermark and / or printed control opening. The introduction of the window opening described above can also occur in a controlled manner using the registration or opening control. It is preferred that the hot stamping device and / or the punching unit for that purpose comprise at least one sensor to detect a feature disposed on or on the substrate, which functions as a registration mark. The sensor can be formed as a camera system or a registration mark reading device for optical registration mark detection, from which signals are sent to a regulating device.
[0036] A registration mark is a mark placed on the substrate that, in a subsequent method step or substrate treatment step such as printing, stamping or forming a window opening, serves to control the position of an application corresponding to the step method or treatment such as the printing layer, embossing layer or window opening on the substrate. A registration mark can be formed as a printed registration cross. A control opening is a window opening formed on the substrate that serves as a registration mark. A control opening can be formed as a registration hole. Due to these registration marks or control openings, it is possible to maintain a predetermined positional accuracy of applications such as printing layer, embossing layer or window opening on the substrate, in relation to an outer edge of a blanket or panel. This is referred to as the registration accuracy of the applications arranged on the substrate. The term registration also encompasses positional accuracy of applications on the front and rear of a substrate mat relative to each other. In the case of double-sided printing, reference is also made to the rotation record. In the case of multicolor printing, the term registration, in particular color registration, also refers to the position of the color separations in relation to each other. In the machine direction or direction of travel of the substrate, reference is made to the circumferential or longitudinal register, and transversely to it, the transversal or lateral register.
[0037] The lateral registration, that is, registration in the transverse direction, of the applications on the substrate, for example, printing and stamping layers arranged in that and opening introduced in that, is always provided and is normally present. For this purpose, the position of the application as a printing path is controlled in relation to the paper and adjusted so that the printing path operates precisely at a defined distance from the edge of a panel. Stamping is also always carried out in the same transversal position on the substrate. This can be ensured by a path edge control of the hot stamping device which, through suspended rails, ensures that the substrate passes to the next station in precise alignment.
[0038] Regarding the longitudinal registration, that is, the precision positioned between two different applications on the substrate in the longitudinal direction, there are several possibilities. It is possible for an application as a stamping path to be arranged on the substrate in the unregistered longitudinal direction, that is, continuously without reference to optionally present longitudinal registration marks, or to be arranged on the registered substrate in relation to longitudinal registration marks.
[0039] It is possible that the first printing takes place in an unregistered way in the longitudinal direction, while the second printing takes place in a registered way. In that case, a perforated control window outside the usable area can serve as a registration mark, said window being preferably formed at the same time as a perforated window opening within the usable area. However, the registration mark can also be a watermark present on a paper substrate or a mark printed on the substrate, which is, for example, applied through inkjet printing.
[0040] It is possible that a registration mark is already placed on and / or on the substrate before the first printing, for example, in the same printing step with which a security printing is applied to the substrate, and the first printing and the second stamping occur with registration accuracy using this registration mark.
[0041] An actual position of a stamping layer or other application such as a printing layer or a window opening that will be applied to the substrate must deviate from a nominal position, the position must be corrected in relation to the substrate. It is preferred that the hot stamping device for this purpose has a positioning unit for aligning and / or correcting a position of the substrate and / or at least one metallic stamping foil. For example, the positioning unit moves a metal stamping sheet at a predetermined distance relative to the substrate mat. It is also possible for the positioning unit to control the position of the embossing foil along the direction of travel of the substrate by means of different tensile forces and resulting elongation of the embossing foil.
[0042] According to a preferred development of the invention, a positioning of the second embossing layer along the direction of travel of the substrate, that is, in the longitudinal register, is controlled using a design feature and / or a registration mark that is present in the first printing layer.
[0043] In this case, in the second printing, the reference point used is not a registration mark placed directly on or on the substrate, preferably printed or perforated, but a design feature and / or a registration mark, preferably , optically detectable that was applied to the substrate with the first stamping layer. This design feature and / or registration mark on the first printing layer serves as a registration mark for the second printing. In this way, the positional accuracy between the first and the second stamping layer can be increased. It is possible for a stamping layer to function only as a registration layer that has registration marks, but no design. This embossing layer is embossed on the substrate as a embossing path that follows the edge of the substrate or between the useful areas of the substrate, and provides registration marks for all embossing paths that will be embossed in parallel on the second embossing.
[0044] It is also possible that the positioning of the stamping layer stamped on the second stamping is controlled using coordinates that result from a combination of a registration mark placed directly on or on the substrate and a registration mark that was applied to the substrate with the first layer stamping. It is possible that the coordinates of registration marks are detected on the substrate and in the first printing layer, the detected coordinates are interpolated and the second printing is controlled using the interpolated value.
[0045] According to a preferred development of the invention, the first embossing layer forms at least a first embossing path on the substrate, while the second embossing layer forms at least a second embossing path on the substrate, which is disposed transversely displaced in the direction of travel of the substrate in relation to at least one first stamping path. Due to the spatial distance between the first and the second stamping station in the direction of travel of the substrate, it is possible to eliminate the existing limitations in the case of conventional stamping machines in relation to the minimum distance between adjacent stamping paths. In a single pass of the substrate, the adjacent embossing paths can be embossed on the substrate close to each other as desired and, due to the fast time sequence of embossing, with a high degree of relative positional accuracy.
[0046] The first embossing layer is embossed on the substrate at the first embossing station, the second embossing layer is embossed on the substrate at the second embossing station, where any desired deviation of the second embossing layer from the first embossing layer can be transversely adjusted to the direction of travel of the substrate.
[0047] For example, it is possible that a specific number of embossing paths will be embossed on one side of the substrate in the first embossing, for example, three to eight paths, and the same number of embossing paths will be embossed again on the side of the substrate in the second printing, but deviated from the first trajectories within the minimum distance. In this way, it is possible to apply more trajectories to a panel as a bank note different from the conventional form, or also to stamp panels with smaller dimensions, such as smaller bank notes, with a trajectory in each case, this is not possible due to limitations in relation to minimum distance in the case of conventional stamping machines. In the substrate blanket, twice as many trajectories as before is thus possible in a single pass, and the paths are closer to each other than allowed by the real machine limitation in the case of conventional stamping machines with a single stamping station. The second paths can directly join the first paths in the longitudinal direction of the substrate and / or at least partially overlap the first paths. In particular, it is possible to obtain a closely adjacent and / or overlapping position of various security elements or foil elements on the substrate, if the transfer layer of a stamping foil formed like the transfer foil is stamped on the substrate in the stamping procedure partially in the form of a locally limited sheet metal element, for example, with a round, oval or square outline.
[0048] According to a preferred development of the invention, the first and / or the second printing layer and / or an additional layer which has been arranged, in particular printed, on the substrate differently by printing have radiation-curable components which, after being stamped or applied to the substrate, they are cured by high energy radiation. It is preferred that the hot stamping device for this purpose comprises a radiation unit for the substrate radiation. UV radiation or particle radiation, for example, electron radiation, is preferably used as radiation. It is possible that the first and / or second printing takes place with printing layers that contain UV-curable varnishes, but which have not yet been finally cured. Furthermore, it is possible that if printing inks are used, they contain curable varnishes by UV, but that have not yet been finally cured. Post-curing or final curing does not take place until stamping is carried out. In this way, it is possible, for example, to provide an impression / foil and / or foil / foil superimposed on the substrate and cure these overlapping layer structures after their application to the substrate.
[0049] In this way, it is possible that an enhanced chemical and / or physical and / or mechanical bonding of layers of a layer structure arranged on the substrate is carried out after its application under each other on the substrate. The components of the layers that react with each other are also conceivable. Furthermore, it is possible that in the uncured / fixed state, the layers react with each other to form another state which is then fixed by radiation. This method can only occur in a fast online process where temporary storage between two stamping, as is inevitable with conventional stamping machines that have only a single stamping station, could be an obstacle.
[0050] It is also possible that the metal stamping sheets that will be stamped are protected against damage with linings, that is, layers of coating that are removed before stamping. Foil stamping sheets can have, for example, liquid, waxy, powdery or flaky components (flakes) or small individual elements such as chips (ICs = integrated circuits) that are encapsulated between the printing and printing layers. A preferred example of these is a screen, for example, an LC display screen or a PDLC screen, preferably made of a liquid crystal material or waxy liquid crystal (LC = Liquid Crystal; PDLC = Liquid Crystal Dispersed in Polymer), or a liquid, waxy or powdery screen with electronic ink.
[0051] According to a preferred development of the invention, after the first printing of at least one functional element disposed in the first printing layer, that element is encapsulated between the first and the second printing layer by the second printing. It is also possible for the individual elements to be placed on the substrate after a first embossing and then encapsulated between two embossing layers in a second embossing. It is preferred that the hot embossing device for placing the individual elements on the substrate comprises a positioning device .
[0052] It is advantageous that the first stamping layer on a first side of the substrate is formed by transposing a window opening that penetrates through the substrate, at least one functional element is disposed in the window opening on a second side of the substrate opposite to the first side, and the second embossing layer on the second side of the substrate is formed by crossing the window opening. By positioning a functional element such as an IC chip in a window opening or a similar recess in the substrate - the element is thus located in a depression - a "construction" of the thickness is avoided or reduced.
[0053] According to a preferred development of the invention, the substrate mat stamped twice is moistened after the first stamping station and / or the second stamping station in relation to the direction of travel of the substrate. It is preferred that the device hot stamping for this purpose comprises a wetting station. This rewetting after a stamping procedure is particularly advantageous in the case of a hot stamping on a paper substrate, since it makes it possible to return moisture to the paper removed by pressure and heat during stamping. A defined residual moisture in a paper substrate is indispensable for a specific elasticity of the substrate.
[0054] The invention will be explained below with reference to several exemplary modalities with the aid of the attached drawings. In which:
[0055] Figure 1a-1c consists of three different exemplary modalities of a hot stamping device in a schematic representation,
[0056] Figure 2a is a schematic representation of a hot stamping device, in which a blanket of substrate passes through a succession of several stations,
[0057] Figure 3 is a schematic section of a stamping roller with pressure rollers,
[0058] Figure 4a-b shows a schematic top view of a substrate mat that passes through a first and a second printing station.
[0059] Figure 5 is a schematic top view of a substrate mat that passes through a first and a second printing station,
[0060] Figure 6a-c consists of schematic sections of stamped and printed substrate blankets after going through a first and a second stamping station, and
[0061] Figure 7a-b consists of schematic sections of patterned substrate blankets equipped with an individual element after going through a first and a second printing station.
[0062] Figure 1a shows a hot stamping device in which the first and second stamping stations are operated with a different transfer metal foil. The hot stamping device comprises a feed roller 31, from which a substrate mat 30 is rolled out, a first stamping station 1 and a second stamping station 2 through which the substrate 30 passes in that order, and a storage roller 32, on which the twice-stamped substrate mat 30 is rolled up. Before the substrate mat 30 passes through the first embossing station 1, it is placed in contact with a first embossing metal foil 10, formed as the transfer metallic foil, which is unwound from a first feed coil 11. In the schematic drawing only a single first feed coil 11 is represented for simplicity purposes; however, in practice, several first feed coils are usually arranged in parallel, corresponding to the number of the first metallic stamping sheets that will be stamped on the substrate mat 30.
[0063] The substrate mat 30 with the transfer metal foil 10 located there is guided around a heated embossing roll of the first embossing station 1 and pressed against each other and against the heated surface of the embossing roll by rollers pressure with an adjustable pressure. The stamping roller and pressure rollers are shown only schematically in Figure 1a to 1c. A more detailed description of the stamping roller and pressure rollers will be found in the description of the figures with reference to Figure 3.
[0064] An adhesive layer, which is arranged on the side of the transfer metal sheet 10 facing towards the substrate 30, and a peeling layer of the transfer metal sheet 10 are activated by the pressure and heat acting on the mat of substrate30 with the transfer metal foil 10 located there, in the first printing station 1. In this way, the adhesive layer joins a transfer layer of the transfer metal foil 10 to the substrate mat 30, and a transport foil for the foil transfer metal 10 can be separated from the transfer layer after the substrate mat 30 passes through the first embossing station 1. This detachment occurs because the metal transport sheet is guided by a bypass roller away from the substrate mat 30 and in towards a first take-up reel 12, on which it is wound. In the schematic drawing, only a single first take-up reel 12 is shown for simplicity purposes; however, in practice, several first take-up spools are usually arranged in parallel, corresponding to the number of the first metal embossing sheets that will be embossed on the substrate mat 30. The transfer layer of the transfer foil 10 remains on the substrate mat 30 as the first stamping layer.
[0065] Before this passes through the second embossing station 2, the substrate blanket embossed once 30 is brought into contact with a second embossing metal sheet 20 formed as the transfer metallic sheet which is unwound from a second feed coil 21 The explanations given above regarding the first embossing procedure at the first embossing station 1 also apply correspondingly to the second embossing procedure at the second embossing station 2. The substrate mat 30 embossed twice after leaving the second embossing station 2 is finally rolled up on the storage roller 32.
[0066] Figure 1 b shows a hot stamping device in which the first and second stamping stations are operated with a different laminating metal sheet. The hot stamping device comprises a feed roll 31 from which a substrate mat 30 is unwound, a first stamping station 1 and a second stamping station 2 through which the substrate 30 passes in that order, and a roll of storage 32 on which the twice-stamped substrate mat 30 is rolled up. Before the substrate mat 30 passes through the first embossing station 1, it is placed in contact with a first embossing metal sheet 10, formed as a laminating metal sheet, which is unrolled from a first feed coil 11. In the schematic drawing , only a single first feed coil 11 is represented for simplicity purposes; however, in practice, several first feed coils are usually arranged in parallel, corresponding to the number of the first metallic stamping sheets that will be stamped on the substrate mat 30.
[0067] The substrate mat 30 with the laminating metal foil 10 located therein is guided around a heated embossing roll of the first embossing station 1 and compressed against each other and against the heated surface of the embossing roll by rollers pressure with an adjustable pressure. An adhesive layer that is disposed next to the laminating metal sheet 10 facing towards the substrate 30, is activated by the pressure and heat acting on the substrate mat 30 with the laminating metal sheet 10 located there in the first station embossing layer 1. In this way, an adhesive layer joins the laminating foil 10 to the substrate mat 30. The foil laminating sheet 10 remains on the substrate mat 30 as the first embossing layer.
[0068] After the first embossing station 1, additional work steps, not shown in more detail here, can be performed, or treatment stations can be passed, for example, in a drilling unit, drilling a hole window on the substrate mat 30 and the laminating metal foil 10 attached to it. The substrate mat 30 can then pass through a rotating station and be rotated therein, with the result that the second embossing procedure occurs at the second embossing station 2 on the other side of the substrate mat 30 for the first embossing procedure and in particular it covers and / or closes the window opening again.
[0069] Before this move to the second embossing station 2, the substrate blanket embossed once 30 is placed in contact with a second embossing metallic sheet 20, formed as the laminating metallic sheet, which is unwound from a second coil feed 21. The explanations given above regarding the first embossing procedure at the first embossing station 1 also apply correspondingly to the second embossing procedure at the second embossing station 2. If the second embossing procedure occurs on the side of the substrate mat 30 opposite the first laminating metal sheet 10, it may be advantageous, in particular to close a window opening in the substrate mat 30 and in the laminating metal sheet 10, if the laminating metal sheet 20, viewed perpendicularly to the substrate mat 30, is arranged broadly congruent to the laminating metal foil 10 or covers the same surface areas as the substrate mat 30 widely The substrate mat 30 stamped twice after leaving the second stamping station 2 is finally rolled up on a storage roll 32.
[0070] Figure 1c shows a hot stamping device, in which the first and second stamping stations are operated with the same metal transfer sheet. The hot stamping device comprises a feed roller 31, from which a substrate mat 30 is rolled out, a first stamping station 1 and a second stamping station 2, through which the substrate 30 passes in that order, and a storage roller 32, on which the twice-stamped substrate mat 30 is rolled up. Before the substrate mat 30 passes through the first embossing station 1, it is placed in contact with a first embossing metal foil 10, formed as the transfer metallic foil, which is unwound from a first feed coil 11. In the schematic drawing , only a single first feed coil 11 is represented for simplicity purposes; however, in practice, several first feed coils are usually arranged in parallel, corresponding to the number of the first metallic stamping sheets that will be stamped on the substrate mat 30.
[0071] The substrate mat 30 with the laminating metal foil 10 located therein is guided around a heated embossing roll of the first embossing station 1 and pressed against each other and against the heated surface of the embossing roll by rollers pressure with an adjustable pressure. The surface of the embossing roll is formed, for example, with protrusions and depressions, and in this way, only partial areas of the transfer metal sheet 10 are located against the embossing roll. An adhesive layer, which is arranged on the side of the transfer metal foil 10 facing towards the substrate 30, and a detachment layer of the transfer metal foil 10 are activated in areas by the pressure and heat acting on the partial areas , which are located against the embossing roller, of the substrate mat 30 with the transfer metal foil 10 located there in the first embossing station 1. In this way, the activated areas of the adhesive layer partially join a transfer layer of the transfer metal sheet 10 to the substrate mat 30, and the transfer metal foil 10 can be separated from the partial areas of the transfer layer attached to the substrate 30, after the substrate mat 30 passes through the first embossing station 1. This detachment occurs because the metal transfer sheet 10 with the areas not yet transferred from the transfer layer is guided by a bypass roller away from the substrate mat 30 walk up to a guide roller 34 which is located at an adjustable distance from the plane of the substrate mat 30. From there, the transfer metal foil 10 is fed back into the plane of the substrate mat 30, so that it is located again on the mat of substrate stamped once 30, when it passes to the second stamping station 2.
[0072] A defined deviation of the transfer metal sheet 10 from the longitudinal direction of the substrate mat 30 is performed by the adjustable distance of the guide roller 34 from the substrate mat 30.The position of the areas not yet transferred from the transfer layer of the transfer foil 10 can thus be adjusted in relation to the substrate mat 30. During the embossing procedure at the second embossing station 2 at least the partial areas of the areas not yet transferred from the transfer layer of the foil transfer sheets 10 are then transferred to predetermined locations on the substrate mat 30. The substrate mat 30 stamped twice after leaving the second stamping station 2 is finally wound onto the storage roll 32. A rotation station can be provided between the first embossing station 1 and the second embossing station 2, with the result that embossing at the second embossing station 2 is real on the side of the substrate 30 opposite the first embossing, resulting in a substrate embossed on both sides using a single metal transfer sheet.
[0073] It is also possible that the detachment of the transfer metal foil 10 is not carried out after the first embossing station 1, but only after the second embossing station 2. This is particularly advantageous when the first embossing station 1 occurs. transfer of the transfer layer of the transfer metal sheet 10 over the entire surface, that is, the adhesive layer of the transfer metal sheet 10 is activated over the entire surface by the pressure and heat acting on it. In the second stamping station 2, the total surface of the transfer foil 10 is then again exposed to pressure and heat, with this an additional partial or complete activation of the adhesive layer of the transfer foil 10 occurs and an increase in the adhesion of the layer transfer of transfer metal sheet 10 to substrate 30 can be obtained. This is particularly advantageous when a very high operating speed is selected during embossing. Despite a very high operating speed, the double activation of the adhesive layer of the transfer foil 10 may make it possible to obtain sufficient adhesion of the transfer layer of the transfer foil 10 to the substrate 30, where, at the same operating speed with just one stamping station, adhesion might not be enough.
[0074] Figure 2 shows in a schematic representation an example of a sequence of several stations of a hot stamping device that are passed through in the order from left to right through a substrate blanket 30 and, below, the sections through substrate mat 30 with corresponding applications. First, the substrate mat 30 is unwound from a feed roller 31.The substrate mat 30 then passes through a printing mechanism 41, in which a printing layer 410 is printed on the substrate 30, for example, a pattern of guilloche in steel engraving printing.
[0075] The substrate mat then passes through a first embossing station 1 in which a first embossing layer 100 is applied to a first side 30v of the substrate. A print 42 then produces a window opening 420 on the printed substrate once, that window opening completely penetrates the substrate mat and the first printing layer 100.
[0076] In the subsequent step, the substrate mat is rotated in a rotation station 43. Subsequently, an optical sensor 44 detects the precise position of the window opening 420 and sends the position coordinates to a regulation device through which a Subsequent printing on a second printing station 2 is controlled. A second stamping layer 200 is applied to the second side 30r of the substrate opposite the first side 30v just over the window opening 420, so that the window opening 420 is closed by the second printing layer 200. In a subsequent step, the Substrate mat is moistened again in a wetting station 45. The twice stamped substrate mat 30 is then rolled onto a storage roller 32.
[0077] It is possible that the hot stamping device also comprises a positioning unit, preferably in the form of an adjustable guide roller that serves to align and correct a position of a second metallic stamping sheet in relation to the substrate blanket. For example, this positioning unit is positioned between sensor 44 and the second printing station 2.
[0078] It is also possible that the hot stamping device additionally comprises a radiation unit, preference, a UV lamp or an electron source, which is used for the radiation of the substrate, to cure a curable material, for example, a coating of varnish, arranged on the substrate. For example, this radiation unit is positioned after the printing mechanism 41 or after the first printing station 1 in relation to the direction of travel of the substrate 30, where it cures a curable printing layer 410 and a curable printing layer 100 stamped on this one, by means of radiation.
[0079] In addition, it is possible that the hot stamping device comprises a positioning unit that serves to position at least one functional element on the substrate. For example, a positioning unit is positioned before a stamping station 1, 2, to deposit on the substrate an LC element or an IC element which is subsequently stamped overlapping with a layer of foil 100, 200 on the stamping station. stamping 1, 2.
[0080] Figure 3 shows a schematic section of a printing roll 5 from a first printing station with eight pressure rollers 51 located against the printing roll 5. A flexible substrate mat 30 is removed from a feed roll 11 , with a metal transfer sheet 10 removed from a feed coil 11, which consists of a metal transport sheet and the transfer layer, guided together on the bypass rollers 36 and guided through a gap between the stamping 5 and pressure rollers 51. Pressure rollers 51 are pressed against the transfer metal foil 10, the substrate mat 30 and the printing roll 5, so that the pressure required to transfer the transfer layer from the sheet transfer metal 10 on the substrate mat 30 is produced. Pressure rollers 51 can in particular be operated in pairs so that a specific number of pressure rollers 51, for example, two, four, six or eight pressure rollers, can be pressed against the embossing roll 5 and can be, thus, optimally adjusted depending on the type of application and speed of application of the stamping pressure. The pressure rollers 51 are arranged so that approximately one third of the embossing roll 5 is surrounded by the substrate mat 30 and metal transfer sheet 10 and a so-called roll cage is formed, which surrounds the bottom of the embossing roll 5 The substrate mat 30 with the embossing foil located on it is also thus guided around the bottom of the embossing roll 5. The advantage of this mat orientation over a mat orientation around the top of the roll embossing 5 is that the excess heat that is released during the embossing procedure is thus removed more efficiently by convection.
[0081] After leaving the support roll 5, the substrate mat 30 supplied in areas or over the entire surface with the transfer layer is separated from the metal transport sheet 10 and optionally the non-transferred areas of the transfer layer by means of a peelable edge 35. The metal transport sheet 10 is wound around a take-up reel 12. The substrate mat stamped once 30 is guided towards a second stamping station which operates in a similar way to the first stamping station .
[0082] The compression force of the pressure rollers 51 against the embossing roller influences the adhesion of a transfer layer or a metallic lamination sheet to the substrate mat. The compression force can be regulated by means of disc springs, positioning cylinders or by a hydraulic or pneumatically controlled flexible bearing of the pressure rollers 51. The compression force can be regulated up or down individually by a pair of pressure rollers, in particular in the direction of rotation of the stamping roller in relation to the compressive force of the respective adjacent pressure roller pair.
[0083] Additional details of the structure and operation of a stamping roller with pressure rollers can be found in patent documents DE 32 10 551 Al, EP 0 089 494 A2 and WO 2005/120832 Al, which are referred to here.
[0084] Figure 4a shows a schematic top view of a substrate mat 30 that passes, from left to right, through a printing mechanism 41, a first printing station 1 and a second printing station 2. In the printing mechanism print 41, registration marks 411 are printed at predetermined distances along the edge of the substrate mat 30, preferably outside the usable area, for example, a registration mark 411 for each row of panels. It is possible for a security print to be printed on the substrate mat panels 30 at the same time as the registration marks 411. However, in the case of a single color printing mechanism, that is, if the registration mark is printed in the same color as the security print, depending on the type of security print, this could result in the registration mark not providing enough contrast for detection by means of a sensor. To avoid these problems, registration marks 411 can be printed in a separate color, preferably in sharp contrast to the substrate, to allow for better optical detection with sensors.
[0085] The printing of the registration mark can also be performed, for example, by means of an inkjet head after the substrate unwind, that is, before the printing mechanism 41, in relation to the direction of travel of the substrate . A black high-contrast record to mark can be printed in this way. This can then be used for an insertion process (longitudinal registration) of the printing mechanism 41. The registration mark, as an alternative to a watermark, can then be used for the insertion process (longitudinal registration) at the station embossing station 1 and embossing station 2. In the 2nd embossing station, alternatively to the registration mark or printed watermark, a perforated mark that has been inserted through a perforation can also be detected, to regulate the longitudinal registration of the embossing station 2.
[0086] A sensor 44 detects the position coordinates of the printed registration mark 411 and sends them to a regulation device through which a subsequent printing of a first printing layer 100 at the first printing station 1 is controlled with registration precision in relation to register mark 411. An additional embossing of a second embossing layer 200 at the second embossing station 2 with register accuracy in relation to register mark 411 is also controlled based on the position coordinates of the printed register mark 411 It is also possible that, instead of printed registration marks, control openings are used, these are, for example, produced in the substrate by a drilling tool.
[0087] Figure 4b shows a schematic top view of a substrate mat 30 that passes from left to right through a first embossing station 1 and a second embossing station 1. In the first embossing station 1 a first embossing layer 100 is stamped onto the substrate mat 30 in the form of a continuous foil strip, wherein the foil strip has a design feature 102, for example, a specific geometric pattern, at fixed distances. A sensor 44 detects the position coordinates of the design features 102 and sends them to a regulating device, whereby a subsequent embossing of a second embossing layer 200 at the second embossing station 2 is controlled with registration accuracy with respect to the feature of designs 102 of the first embossing layer 100.
[0088] Figure 5 shows a schematic top view of a substrate mat 30 passing from left to right through a first embossing station 1 and a second embossing station 2. The width 300 of the substrate mat 30, which is equivalent , for example, at 1000 mm, it is divided into several panel bottlenecks 304. A specific number of embossing paths can be allocated in each panel bottleneck 304, that is, a specific number of embossing layers will be applied to each panel. In the first embossing station 1, each panel choke 304 is embossed with a first embossing layer along a first embossing path 101. The distance 301 between two adjacent first embossing paths 101 is limited, for example, to approximately 100 mm , for structural reasons. In the second embossing station 2, each panel choke 304 is embossed with a second embossing layer along a second embossing path 201. The distance 302 between two second adjacent embossing paths 201, corresponding to the first embossing paths 101, it is also limited, for example, also to approximately 100 mm, for structural reasons.
[0089] In the second embossing station 2, the second embossing paths 201 can be produced as short a distance as desired from the first embossing paths 101, since the deviation between the first and second embossing paths 101, 201 it is not subject to any structurally determined limitations. Due to the passage of the substrate mat 30 through two consecutive stamping stations 1,2 each panel choke, and thus each panel, can be stamped with different stamping layers that are as short a distance as desired one of the others in a process. Compared with conventional stamping devices with only a single stamping station, a significant increase in efficiency is therefore possible.
[0090] Figure 6a shows a schematic section of a substrate mat stamped twice and printed once 30 which was produced in a hot stamping device as follows: After unrolling the substrate mat 30 from a feed roller , the substrate mat 30 is embossed in a first embossing station, with a first embossing layer 100, for example, in the form of a foil adhesive detached from a transfer foil. The substrate mat 30 is then printed on its embossed side once with a printing layer 410. This can be done using an offset printing, silkscreen, gravure printing or inkjet printing procedure. The print layer 410 may be information, for example, a value indication, a portrait or other image, or a pattern that is difficult to reproduce, for example, guilloches or a large fine line. printing 410 is applied exclusively to the printing layer 100. Alternatively, the printing layer 410 can extend over the printing layer 100 and the unprinted surface of the substrate mat 30. In a subsequent step, the substrate mat 30 is embossed, in a second embossing station, with a second embossing layer 200 which precisely covers the first embossing layer 100, for example, in the form of a metal foil adhesive detached from a metal transfer foil. The printing layer 410 is thus protected against chemical and physical manipulation by encapsulation between the printing layers 100, 200.
[0091] Figure 6b shows a schematic section of a substrate mat stamped twice and printed twice 30. The processing steps of the substrate mat 30 correspond to those of the substrate mat shown in Figure 6a, with the difference that the second printing layer 200 is printed in a final step, that is, in an additional printing mechanism arranged after the second printing station in relation to the direction of travel of the substrate, with a second printing layer 412, to which the explanations regarding to Figure 6a apply accordingly. Optical and functional effects can be produced by an interaction of registration accuracy of the first and second print layers 410,412.
[0092] Figure 6c shows a schematic section of a substrate mat stamped twice and printed three times 30 that was produced in a hot stamping device as follows: After unrolling the substrate mat 30 from a feed roller , the substrate mat 30 is printed on a first printing mechanism, with a first embossing layer 410. The first printing layer 410 is then superimposed embossing, on a first embossing station, with a first embossing layer 100 The first printing layer 100 is then printed with a second printing layer 412. In a subsequent step, the second printing layer 412 is printed, in a second printing station, with a second printing layer 200 that precisely covers the first printing layer 100. The three printing layers 410, 412, 413 can consist of the same printing material, for example, the same ink, or of printing materials many different. It is possible, for example, that the first printing layer 410 is a dark ink, with which information such as a word or a fig. is printed on the paper substrate. The second and third print layers 412,413 can be varnishes of a different color that exhibit additional effects, for example, fluorescence. Optical and functional effects can be produced by an interaction of registration accuracy of the three print layers 410,412, 413.
[0093] It is also possible that the adjacent layers of the layers shown in Figure 6a-c, for example, the first printing layer 410 and the second embossing layer 200 shown in Figure 6b, comprise materials of not yet fully cured that react between after the adjacent layers are stamped or printed. Only after its application does a final cure take place at a device's curing station, for example, a UV radiation unit. Until these are finally cured, a first substance contained in the first printing layer 410 interacts with a second substance contained in the second printing layer 200 to achieve a reaction state that is fixed by radiation.
[0094] The layer structures shown in Figure 6a - 6c can also close or at least partially cover a window opening in the substrate mat 30.
[0095] Figure 7a shows a schematic section of a twice-stamped substrate mat 30 that was produced in a hot stamping device as follows: After unrolling the substrate mat 30 from a feed roller, the mat substrate 30 is stamped on a first stamping station, with a first stamping layer 100. In a device positioning station, a functional element 460, for example, an IC chip or an LC screen, is then placed in the center of the first printing layer 100, preferably fixed by means of an adhesive layer previously applied to the first printing layer 100 and, finally, in a subsequent step, the functional element 460 is printed, in a second printing station, with a second embossing layer 200 which covers precisely the first embossing layer 100. Functional element 460 is thus protected against chemical and physical manipulation by encapsulation between the layers of stamping 100, 200.
[0096] Figure 7b shows a schematic section of a twice-stamped substrate mat 30 that was produced in a hot stamping device as follows: After unwinding the substrate mat 30 from a feed roller, an opening window 420 is formed on the substrate mat 30, in a drilling unit. Subsequently, in a first embossing station, the window opening 420 is closed with a first embossing layer 100 which is embossed on the back 30r of the substrate 30. Subsequently, the substrate mat 30 passes through a rotation station 43 in that this is rotated. In a device positioning station, a functional element 460, for example, an IC chip or an LC screen, is then inserted in particular in the center of the window opening 420 and can be fixed in particular by means of an adhesive layer option 414, in the first printing layer 100. In a subsequent optional step, on a printing mechanism, the remaining space of the window opening 420 can be filled with a filling material 415, for example, a clear plastic varnish. Finally, in a second embossing station, the window opening 420 is closed with a second embossing layer 200 which is embossed on the front 30v of the substrate 30. Functional element 460 is protected against chemical and physical manipulation by encapsulation between the layers embossing 100, 200. In addition, an unwanted thickness of the finished substrate in the area of the functional element 460 is avoided or reduced by positioning the functional element 460 in the window opening 420. List of numerical references 1first embossing station 2second embossing station 5roll embossing 10first foil embossing 11first feed coil 12first pickup coil 20second foil embossing 21second feed coil 22second pickup coil 30substrate, substrate mat 30vfrontal part 31feed roller 32store roller 33stroke direction of the roll 33 -35 stripped edge el 36 deflection roller 41 printing mechanism 42 perforation 43 rotation station 44 sensor 45 wetting station 51 pressure roller 100 first printing layer 101 first printing path 102 design feature 200 second printing layer 201 second printing path 300 width of the substrate blanket the first distance between the two paths and the distance between the first paths between the two paths between the first and the next 302distance between the second adjacent embossing paths 303distance between the first and second embossing paths 304panel layering 410print layer (first) 411 registration mark 412second printing layer 413third printing layer 414adhesive layer 415filling material 420panning element 460

权利要求:
Claims (22)
[0001]
1.Hot stamping method of at least part of at least one stripe-shaped hot foil foil (10, 20) on a stripe-shaped substrate (30), where the substrate (30) will be stamped is placed in contact with a metal stamping foil (10, 20) of at least one metal stamping foil (10, 20), the substrate (30) and the metal stamping foil (10, 20) located therein are guided along the periphery of a first heated stamping roll (5) in which, in a first stamping, the substrate (30) and the metallic stamping foil (10, 20) located there are pressed against each other and against the surface the first printing roller (5) is heated by at least one first pressure roller (51) disposed on the periphery of the first printing roller (5) and a first printing layer (100) is printed on the substrate (30), the substrate once stamped (30) is guided away from the first stamping roll (5) and contact with the same or an additional embossing foil (10, 20) of at least one embossing foil (10, 20) after the first embossing roll (5) in relation to the travel direction (33) of the substrate ( 30), the substrate stamped once (30) and the metal stamping foil (10, 20) located there are guided along the periphery of a second heated stamping roll (5) in which, in a second stamping, the substrate (30) and the metallic stamping foil (10, 20) located therein are pressed against each other and against the heated surface of the second stamping roller (5) by at least one second pressure roller (51) disposed on the periphery of the second stamping roll (5) and a second stamping layer (200) is stamped on the substrate (30), and the twice stamped substrate (30) is guided away from the second stamping roll (5) characterized by the fact that the substrate (30) is rotated in a rotation station (43) between the first and the second stamping.
[0002]
2. Method according to claim 1, characterized by the fact that in the first stamping, the substrate (30) and the metallic stamping sheet (10, 20) located there are pressed against each other and against the heated surface of the first printing roll (5) by at least two first pressure rolls (51) arranged around the first printing roll (5) at a distance from each other and the first printing layer (100) is printed on the substrate (30 ).
[0003]
3. Method according to claim 1 or 2, characterized by the fact that in the second printing, the substrate (30) and the metallic printing sheet (10, 20) located there are pressed against each other and against the surface the second printing roll (5) is heated by at least two second pressure rollers (51) arranged around the second printing roll (5) and at a distance from each other and the second printing layer (200) is printed on the substrate (30).
[0004]
Method according to any one of the preceding claims, characterized by the fact that the substrate (30) is printed with at least one printing layer (410) before the first printing and / or between the first and the second printing and / or after the second printing.
[0005]
5. Method according to claim 4, characterized by the fact that at least one printing layer (410) is arranged in an area that will be stamped and / or in a stamped area of a substrate stamped once and / or twice (30).
[0006]
6. Method according to any of the preceding claims, characterized by the fact that the first and second stamping layer (100, 200) are stamped on opposite sides (30v, 30r) of the substrate (30).
[0007]
Method according to any one of the preceding claims, characterized in that a window opening (420) is formed on the substrate (30) before the first printing and / or between the first and the second printing and / or after the second printing.
[0008]
8. Method according to any one of the preceding claims, characterized by the fact that before the first printing and / or between the first and the second printing, a registration mark (411) is printed, or a control opening (420 ) is formed on the substrate (30) and a placement of the first printing layer (100) and / or second printing layer (200) along the direction direction (33) of the substrate (30) is controlled using the registration mark (411) or the control opening (420).
[0009]
9. Method according to any one of the preceding claims, characterized by the fact that a positioning of the second printing layer (200) along the stroke direction (33) of the substrate (30) is controlled using a design feature and / or a registration mark (411) that is present on the first printing layer (100).
[0010]
Method according to any one of the preceding claims, characterized in that the first embossing layer (100) forms at least one first embossing path (101) on the substrate (30) and the second embossing layer (200) forms at least one second embossing path (201) on the substrate (30), which is arranged offset with respect to at least one first printing path (101) transversely to the direction of travel (33) of the substrate (30).
[0011]
11. Method according to any one of the preceding claims, characterized by the fact that the first and / or the second printing layer (100, 200) and / or an additional layer (410) that has been arranged, in particular printed, on the substrate otherwise they have radiation-curable components which, after being stamped or applied to the substrate (30), are cured by radiation.
[0012]
12. Method according to any one of the preceding claims, characterized by the fact that after the first printing of at least one functional element (460) disposed in the first printing layer (100), that element is encapsulated between the first and the second printing layer (100, 200) by the second printing.
[0013]
13. Method according to claim 12, characterized by the fact that the first stamping layer (100) is formed on a first side (30v) of the substrate (30) through a window opening (420) that penetrates through the substrate (30), at least one functional element (460) is arranged in the window opening (420) on a second side (30r) of the substrate (30) opposite the first side (30v), and the second stamping layer (200 ) is formed on the second side (30r) of the substrate (30) over the window opening (420).
[0014]
14. Hot stamping device comprising a substrate feeder, through which a strip-shaped substrate (30) to be stamped can be fed; at least one strip guide (36), through which at least one strip-shaped metal foil (10) can be placed in contact with the fed substrate (30); a first printing station (1) with a first heated printing roller (5) and at least one first pressure roller (51), disposed on the periphery of the first printing roller (5), through which the substrate (30) and a metal stamping foil (10, 20) located on that of at least one metal stamping foil (10, 20) can be guided along the periphery of the first stamping roll (5) and thus at least part of the foil embossing metal (10, 20) located on the substrate (30) can be embossed on the substrate (30) in the form of a first embossing layer (100); a second printing station (2) disposed after the first printing station (1) in relation to the direction of travel (33) of the substrate (30), with a second heated printing roll (5) and at least a second printing roll pressure (51), arranged on the periphery of the second printing roll (5), through which the substrate once printed (30) and a metal printing sheet (10, 20) located on that of at least one metal printing sheet ( 10, 20) can be guided along the periphery of the second embossing roll (5) and thus at least part of the embossing foil (10, 20) located on the substrate (30) can be embossed on the substrate (30) in the form of a second printing layer (200); and a substrate distribution unit, through which the substrate stamped twice (30) can be removed from the device characterized by the fact that a rotating station (43) which is arranged between the first and the second stamping station (1 , 2) to rotate the substrate (30).
[0015]
15. Device according to claim 14, characterized by the fact that the first printing station (1) comprises at least two first pressure rollers (51), arranged around the first printing roll [comprises] in a distance from each other, through which the substrate (30) and the metal embossing sheet (10, 20) located on that of at least one metal embossing sheet (10, 20) can be guided along the periphery of the first web roll embossing (5) and thus at least part of the embossing foil (10, 20) located on the substrate (30) can be embossed on the substrate (30) in the form of the first embossing layer (100).
[0016]
16. Device according to claim 14 or 15, characterized in that the second printing station (2) comprises at least two second pressure rollers (51), arranged around the second printing roll at a distance one on the other, through which the substrate stamped once (30) and the stamping foil (10, 20) located on that of at least one stamping foil (10, 20) can be guided along the periphery of the second roll embossing pattern (5) and thus at least part of the embossing foil (10, 20) located on the substrate (30) can be embossed on the substrate (30) in the form of the second embossing layer (200).
[0017]
17.Device, according to any one of claims 14 to 16, characterized by the fact that at least one printing mechanism (41) arranged before the first printing station (1) and / or between the first and the second embossing station (1,2) in relation to the travel direction (33) of the substrate (30) and / or after the second embossing station (2) in relation to the travel direction (33) of the substrate (30), for apply at least one printing layer (410) to the substrate (30).
[0018]
18.Device, according to any one of claims 14 to 17, characterized by the fact that a unit (42) arranged before the first printing station (1) and / or between the first and the second printing station (1 , 2) in relation to the travel direction (33) of the substrate (30) and / or after the second printing station (2) in relation to the travel direction (33) of the substrate (30), to form at least one opening window (420) on the substrate (30).
[0019]
19.Device, according to any one of claims 14 to 18, characterized by the fact that a sensor (44) to detect a feature arranged on or on the substrate (30), which functions as a registration mark (411).
[0020]
20.Device, according to any of claims 14 to 19, characterized by the fact that a positioning unit for the alignment and / or correction of a position of the substrate (30) and / or at least one metallic sheet of stamping (10, 20).
[0021]
21.Device according to any one of claims 14 to 20, characterized by the fact that a radiation unit for the substrate radiation (30).
[0022]
22. Device according to any one of claims 14 to 21, characterized by the fact that a positioning unit for positioning at least one functional element (460) on the substrate (30).

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同族专利:

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公开号 | 公开日

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WO2012159871A3|2013-08-22|

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EP3287296B1|2022-03-09|

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JP6002977B2|2016-10-05|

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KR101980393B1|2019-05-20|

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PL2714423T3|2018-03-30|

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BR112013029797A2|2017-01-17|

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US20140174306A1|2014-06-26|

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CN103635332B|2016-08-24|

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EP2714423A2|2014-04-09|

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ES2471951T1|2014-06-27|

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DE102011103000A1|2012-11-29|

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RU2608913C2|2017-01-26|

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JP2014522328A|2014-09-04|

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ES2471951T3|2018-01-19|

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US9511619B2|2016-12-06|

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MX357180B|2018-06-29|

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EP3287296A1|2018-02-28|

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KR20140029492A|2014-03-10|

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WO2012159871A2|2012-11-29|

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ES2659221T1|2018-03-14|

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HUE038087T2|2018-09-28|

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EP2714423B1|2017-10-11|

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RU2013157180A|2015-06-27|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-10-08| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-08-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-11-24| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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DE102011103000A|DE102011103000A1|2011-05-24|2011-05-24|Method and apparatus for hot stamping|

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DE102011103000.3|2011-05-24|

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PCT/EP2012/058272|WO2012159871A2|2011-05-24|2012-05-04|Method and device for hot stamping|

---