• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    A security paper having a fibrous substrate and at least one window-integrated security thread (7) in said fibrous substrate, the fibrous substrate having at least one region of variable opacity (16) extending at least partially over a bridge ( 13) of the fibrous substrate located between two successive windows (10) along the security thread.
    公开号:FR3022489A1
    申请号:FR1455780
    申请日:2014-06-23
    公开日:2015-12-25
    发明作者:Henri Rosset
    申请人:ArjoWiggins Security SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to fibrous substrates having at least one region of variable opacity, preferably a watermark, and at least partially incorporating a security thread. Banknotes and other security documents, including checks, money orders, identity cards, credit cards or guarantee cards made from papers incorporating security threads, that is to say more or less wide bands, have been in circulation for a number of armies and are now widely used in many countries. The security threads are in these documents in some cases exposed to the sight, in reflected light, in predefined regions present on at least one face of the paper, these regions being commonly called "windows". Security threads make the imitation of security documents more difficult. They contribute to the authentication of security documents generally by giving documents a different appearance in transmitted light and reflected light. To increase the security provided by the incorporation of such security elements, it is customary to provide them with additional verifiable properties, including magnetic, electrical conductivity, X-ray absorption and / or luminescence, for example fluorescence . Methods of making paper having a security thread incorporated in windows are known from EP 0059056, WO 93/08327 and WO 03/095188. EP 0059056 discloses a method of manufacturing a paper incorporating a window security thread by papermaking on a round shape. The round shape canvas is embossed to create projecting areas. The safety wire is brought into contact with these projecting regions before entering the tank containing the aqueous suspension of paper fibers. The fibers do not accumulate in the areas of contact of the wire with the fabric of the round form. After its formation, the paper jet is extracted and dried. The finished paper has windows visible in reflected light on one side, allowing the security thread to appear locally. The paper comprising the security thread may locally have a thickening at the thread. This extra thickness is amplified during the stacking of the paper, whether during the winding of the roll paper or when it is cut into sheets. In order to overcome this problem, it is known to impose on the yarn an oscillation in the direction perpendicular to the direction of manufacture of the paper during its integration into the paper. The projecting regions therefore have a width greater than the width of the wire. Thus, when viewing the paper transmitted light, the latter has on both sides of the wire an alternation of dark regions adjacent bridges and clear regions 5 adjacent to the windows. WO 93/08327 discloses a method of manufacturing a paper incorporating a security thread on a flat-bed paper machine. It is also known from the application WO 03/095188 a method for manufacturing a paper incorporating a security thread, visible through windows with particular patterns. EP 2 275 602 discloses a paper incorporating a security thread incorporated into windows and watermarks spaced therefrom. The application WO 2009/083689 describes the combination of a watermark and a security structure which is at least partially superimposed on the watermark, and comprises set-ni-reflective zones allowing at least partial visualization of the underlying watermark. underlying. This watermark can be a screened watermark. The security structure can be glued to one side of the papermaking substrate opposite to the watermark, or on the same face. The security structure remains on the surface of the paperboard substrate over its entire length and it is not in this document a security structure constituted by a security wire integrated in 20 windows. The application WO 2009/115766 teaches how to mechanically reinforce a papermaking substrate in corners using dark watermarks. A security element may be disposed on the surface of the substrate. The application WO 2009/081017 proposes a filigree substrate incorporating a ribbon, in particular a fibrous band, which is superimposed at least partially on the watermark. The watermark thus has different aspects in its portion which is superimposed on the ribbon and in its non-superimposed portion ribbon. The watermark can be a screened watermark. The purpose of this request is not to facilitate the recognition of a conventional integrated security wire in windows, but to create a modification of the appearance of the watermark. Lunch vouchers with watermarks and a security thread superimposed on the watermarks, which is found on one side of the paper in the watermark area, have been marketed. 3022489 3 There is a need to further improve the security of papers against counterfeit attempts, including providing first level security easily recognizable by the man in the street, while having a paper relatively easy to achieve and appearance attractive. SUMMARY The invention aims to meet this need by proposing a security paper comprising a fibrous substrate and at least one integrated security thread in windows in this fibrous substrate, the fibrous substrate having at least one region of variable opacity. at least partially extending on a bridge of the fibrous substrate located between two successive windows along the at least one security thread. The invention makes it possible to attractively combine at least two superimposed first level safeties, namely the security son or wires visible in windows and the region of variable opacity, superimposed on the security element at the level of the one or more bridges. The security paper may comprise a plurality of security threads, in particular two security threads integrated into windows in the fibrous substrate. The security threads can be juxtaposed or not and be integrated in the same window or not. The region of variable opacity may extend over a bridge of the fibrous substrate superimposed on the security threads and located between two successive windows along the security threads.
    [0002] The security son or son advantageously comprise a film of .support plastic, in particular thermoplastic material. The security son or son are generally at least partially covered by the fibrous substrate at the bridges. This increases the security of the security paper by at least partially integrating the security thread (s) into the interior of the substrate. According to an exemplary embodiment of the invention, the region or regions of variable opacity are located exclusively at the level of the bridge or bridges. For example, there is a variable opacity region at each bridge or a region of opacity that varies every n bridges, where n is an integer greater than one.
    [0003] According to an exemplary implementation of the invention, the fibrous substrate has at least one other region of variable opacity appearing to border the son or son at at least one window when the paper is observed in transmitted light. The other region (s) of variable opacity preferably extend along the wire (s) at the level of the windows, without overflowing on the bridges extending between the windows. For example, there is a region of variable opacity on either side of the security son or son at each window and not extending on the adjacent bridges. We can have for each window a region of variable opacity that extends on either side of the son or son at this window, or such a region of variable opacity for n windows, with n higher integer has a. By variable opacity region "bordering" the security son or son, it should be understood that said region extends along a longitudinal edge of the security son or son. It can be superimposed on at least one longitudinal edge of the security son or son or extend a sufficiently small distance from the longitudinal edge, for example less than 2 mm so that visually the observer has, in transmitted light, the impression that the security son or son are substantially contiguous with or superimposed on said region. The substrate may have a plurality of regions of varying opacity, some of which are at the bridges without overflowing into the windows and some of them, preferably reproducing a different pattern, extending along the windows without overflowing on the bridges. The presence of regions of variable opacity appearing to border the son or son at the windows without overflowing on the bridges makes it possible to attractively combine two adjacent first level safeties, namely the security son or wires visible in windows and the region of variable opacity bordering the security son or son. In an exemplary implementation, the thickness of the substrate is never zero at the bridge, and the security son or son are thus always covered by fibers of the substrate. Alternatively, the region of variable opacity is such that regions of lower opacity thereof are constituted by holes in the fibrous substrate which open onto the security son or son, revealing the security son or son in the holes, or which are such that the thickness of the substrate covering the security son or son is sufficiently low so that the son or son of security are visible in reflected light in the holes. The son or son can thus become locally visible at a bridge in reflected light. However, preferably in this case, the total section of the hole or holes remains minority relative to the total section of the bridge elsewhere, so as to maintain mechanical cohesion ensuring good maintenance of son or son within the substrate. In yet another variant, the bridges only partially cover the safety wire or wires so that the latter remain partially visible. For example, the bridges may have the form of half-bridges covering only one side or the security son on less than their entire width. Alternatively, the bridges may be open, preferably substantially at their center, revealing the wire or wires at the aperture. When the security son or son are directly exposed in a bridge or security son advantageously comprise visible security at this level; it may be a visible security in reflection, for example producing a particular optical effect such as a goniochromatic effect.
    [0004] The security son or son advantageously comprise at least one luminescent security, in particular fluorescent security. The region of variable opacity can improve the visibility of luminescent security because of its less opacity in places; for example, in the region or zones of less opacity of the region of variable opacity, the light produced by luminescence is less attenuated by its diffusion through the substrate, or even not attenuated. It is possible to create an effect under UV or IR light for exciting the luminescence, which is particularly attractive visually. When the paper is cut into the format of a secure document, the secure document may include one or more windows along di or wires between the edges of the document where the ends of the one or more wires end.
    [0005] Substrate The term "substrate" refers to a fibrous sheet that may include, in particular, one or more fibrous layers, also referred to as "jets". The substrate is preferably bijet, the windows being obtained during the manufacture of these jets. The substrate may include one or more regions of varying opacity with identical or different characteristics. The substrate may comprise or receive at least one additional security element, constituting a security of first, second or third level, in particular chosen from tracers, in particular nanometric, security fibers, in particular metallic, magnetic (soft and / or hard) ), absorbable or excitable in the ultraviolet (UV), the visible or the infrared (IR) and in particular the near infrared (NIR), the flat and relatively small security elements such as boards, pigments or agglomerates of pigments, in particular absorbent or exchangeable under laser illumination or in the ultraviolet (UV), visible or infrared (IR), in particular the near infrared (NIR), the chemical or biochemical infaling reagents and / or authentication and / or identification, which may especially react with at least one agent, respectively falsification and / or authentication and / or identification, and the optically variable elements, in particular holograms, liquid crystals, iridescent pigments or mirror effect structures, particularly dielectric layers, and combinations thereof. The fibrous substrate may in particular comprise additional security elements visible to the naked eye, but it may also comprise tracers which are in the form of active material, particles or fibers capable of generating a specific signal when these tracers are subject to optronic, electrical, magnetic or electromagnetic excitation. The fibrous substrate may include a plurality of windows alternating with a plurality of bridges extending between the windows. The wire (s) may extend at each window between two regions of variable opacity and / or each bridge may include a region of variable opacity. Alternatively, a single bridge has a region of variable opacity. Bridges can completely cover the safety wire or wires. As a variant, the bridges partially cover the safety thread or threads, the latter then remaining partially visible at the level of the bridges. The bridges may be as described in European Patent Application EP 2,260,142. The windows may be formed by at least a portion of a recessed relief of the substrate. Bridges can be the same height in the thickness direction as vellum. Alternatively, the bridges may be formed by a portion of a relief projecting from the substrate. By "at the level of", it is necessary to understand at the same longitudinal position, measured along the son or son. The fibers of the substrate may be naturally occurring fibers and / or synthetic fibers. The substrate may comprise cellulosic fibers, cotton or linen. The substrate may comprise opacifying charges, especially mineral.
    [0006] The substrate may comprise a synthetic binder and receive on the surface a printing coating and / or antifouling. The substrate may comprise on at least one of its faces, preferably on both sides, a plastic protective rope.
    [0007] The substrate may comprise, on at least one of its faces, preferably on both sides, an impregnation, a surfacing, a coating, in particular a coating, and / or a varnish. Region of Variable Opacity By "region of variable opacity", it is necessary to understand a portion of the substrate 10 whose opacity varies in its plane when observed in transmitted light at normal incidence. The opacity variations are preferably visible in light transmitted to the naked eye, in white light of the day. The region of variable opacity may be defined by a watermark, for example multiton or multiton effect, a pseudo-watermark obtained by embossing and / or compression and / or by use of a transparentizing substance, especially an oily substance, or a region of variable opacity obtained by laser ablation. Preferably, the region of variable opacity is a halftone region of variable opacity. The presence of the region of variable opacity, in particular screened, makes it possible to reinforce the level of security by drawing the observer's attention to the security or the security provided by the adjacent security wire or wires. Indeed, many security threads embedded in windows are often counterfeited by sticking pieces of son on the surface of the paper, their visibility on the security document, including printed, usually being relatively low. When the region of variable opacity, in particular a raster, is superimposed on the safety wires or at the level of a bridge, the visibility of the security son or wires can be improved in reflected and / or transmitted light, made of a less local opacity in places of the substrate because of the variation of its opacity. By "halftone region of variable opacity", it is necessary to understand a region whose pattern created by the variation of opacity and visible in transmitted light is a halftone image.
    [0008] It may be an image formed with weft points whose spacing is constant or variable, and whose size is constant or variable.
    [0009] The raster points of the raster image may be small enough that the image observed in transmitted light creates a uniform gray level, different from vellum when viewed with the naked eye at a distance of 20 cm. for example "Vellum" means the fibrous substrate outside the zones of variable Opacity, especially outside the 5 regions of variable opacity according to the invention. The raster points can still remain visually discernible to the naked eye at a distance of 20 cm, when the raster image is observed in transmitted light, giving for example the impression to the observer of a grid or a network of points, for example regularly distributed in the plane of the substrate.
    [0010] Weft points may exhibit a variation in density and / or size from one area to the other of the screened region. The shape of the raster points may or may not be circular, these possibly consisting of lines whose width and / or spacing varies. Thus, the term "raster dot" should not be understood in a limiting sense.
    [0011] A raster region of variable opacity may have a relatively large number of raster points in the form of light or dark islands on the image, which may appear as pixels constituting the image. The image rendered by the halftone region may be other than a grid or a regular network of points, and may reproduce the appearance of a subject in perspective, by restoring the relief with shadows on the image. and / or thanks to variations in the density and / or dimension of the points, in this case we speak of a three-dimensional effect. The subject reproduced by the halftone region can be an inanimate object, a landscape, a monument, a character, a plant (flower, plant, tree) or an animal, as is usually found on banknotes for example. In this case, the raster points can be arranged in amplitude or frequency modulation to reproduce the light and dark regions of the image, for example in several gray levels. The largest dimension of a weft dot may be between 0.1 and 1.5 mm, for example between 0.2 and 1.0 mm.
    [0012] The smallest dimension of a raster dot, especially when the raster points consist of lines, can be between 0.1 and 1.5 mm, for example between 0.2 and 1.0 mm.
    [0013] 3022489 9 The number of raster points, ç appear either in lighter, or in darker than the rest of the image, is for example between 10 and 2500 per cm2, for example between 25 and 625 per cm2 per halftone region variable opacity. Each variable opacity region disposed at least partially at a bridge, i.e. where the at least one security lead is at least partially embedded in the substrate, may be totally or partially superimposed on or When the substrate is multi-jet, the region of variable opacity may be formed by a watermark made on a separate jet which is assembled with that in which the windows are made, especially in the case of a variable opacity region appearing to border the son (s) at the level of at least one window In an exemplary implementation, the regions of variable opacity extend only where they overlap at least partially with the one or more security threads; alternatively, regions of varying opacity extend both above and across the yarns, especially on one or both sides of the yarn (s); for example, the outline of a region of variable opacity at a bridge is rectangular of large side wider than the son or son and oriented perpendicular to the longitudinal axis of the son or son. The maximum distance over which a region of variable opacity extends in a direction perpendicular to the longitudinal direction of the wire or wires, beyond the wire or wires, is preferably less than or equal to 40 mm. are each formed by at least a portion of a relief projecting from the substrate, the regions of variable opacity extending partially on the bridges, in particular extending longitudinally and / or transversely to a distance less than that of the bridges.
    [0014] Each region of varying opacity bordering the security thread (s) at a window, i.e. where the security element is flush with the surface of the substrate, can completely border at least one side of the or visible security threads, in particular both sides, in this zone, all along its length between two consecutive bridges. As a variant, the region of variable opacity only partially borders this side of the son or wires, and in this case extends for example along a length, along the safety wire or wires, which is less than that between two wires. consecutive bridges.
    [0015] The fibrous substrate may comprise a plurality of regions of variable opacity, identical to each other, and preferably distributed at regular intervals on the substrate. Preferably, the regions of variable opacity all have an identical transverse dimension, in particular between 10 and 40 mm. The transverse dimension 5 is measured perpendicular to the longitudinal axis of the safety son or son. As a variant, the regions of variable opacity that follow each other are not all identical and / or do not have the same transverse dimension. Preferably, there are found on the substrate with a certain periodicity of regions of variable opacity of identical aspects. Regions of variable opacity can form any major outline pattern when observed in transmitted light. Preferably, the regions of variable opacity form a main pattern of polygonal or ovoid contour. The term "main pattern" designates the pattern defined by the set of the variable opacity region, and not the shape of a clear or dark individual island constituting a pixel of the image produced. The region or regions of variable opacity preferably each comprise a watermark, a pseudo-watermark, each better constituted by a watermark, that is to say that they are obtained by paper means by a local accumulation. more or less large paper fibers, preferably by embossing or using a mask disposed on a web forming a jet of paper. Such a mask is still called "galvano". Alternatively, the region or regions of variable opacity comprise microperforations, in particular obtained by laser ablation. In the case of a watermark or pseudo-watermark, the watermark or pseudo-watermark carried by the fibrous substrate can be a clear watermark. In this case, the light areas of the watermark have a mass density strictly less than that of the areas outside said watermark. The dark areas have the same surface density as the areas outside said watermark or higher density. As a variant, the watermark may be a dark watermark, in which case the dark areas of the watermark have a density that is strictly greater than that of the zones outside said watermark. The light areas may have the same density at the same time as the areas outside the said watermark or a lower density. The variation in surface density is related to a local variation in the thickness of the substrate.
    [0016] By "surface density of the light / dark areas of the watermark" is meant the surface density of the fibers of the substrate of the light areas and / or the dark areas of the watermark, that is to say not taking into account the or security threads. Preferably, the watermark or pseudo-watermark is a halftone multitone effect watermark comprising a set of light areas arranged in the manner of a halftone image and distributed to form an image having a plurality of gray levels according to the surface density of the light areas. Thus, for example, those portions of the substrate having a high surface density of bright areas appear in a light tone and the portions having a low surface density of bright areas appear in a dark tone.
    [0017] Alternatively, the watermark may comprise a set of dark areas arranged in the manner of a raster image. The patent application EP 1 122 360 discloses the production of such a screened watermark. The watermark can be a multitone watermark made by embossing the substrate, so that the latter has reliefs of various levels.
    [0018] The watermark may be a multitone watermark produced as described in the application WO 2011/117828, that is to say a watermark made from a perforated mask of variable thickness. The perforations are especially équiréparties and flared shape. Thicker areas are perforated with a smaller hole than the thinner areas. The different gray levels then depend on the size of the perforations, depending on the thickness of the mask itself. The watermark can be an electrotype watermark ("high contrast single tone watermark"). The watermark may be a watermark obtained on a flatbed machine, in particular by means of a watermarking roll.
    [0019] The watermark can be obtained by means of a perforated mask or by means of a perforated mask provided with reliefs. In a variant, the openwork masks are embossed, in particular at the same time as the training fabric. Alternatively, the watermark or pseudo-watermark may be obtained by compression and / or by use of a transparentizing substance, in particular an oily substance and / or by laser ablation.
    [0020] The clear zones of the watermark at the level of the bridges may be formed by recesses or not through the fibrous substrate revealing the underlying security son or son, as mentioned above. The light areas may be such that there is always a non-zero thickness of substrate at the bridges between the outer surface of the substrate and the one or more security threads. When the regions of variable opacity are constituted by a pseudo-watermark, this can be obtained by means of a local transparency of the substrate using a suitable substance, for example an oily substance. Where the regions of variable opacity are a pseudo watermark, this may also be achieved by methods of applying a rewetting solution to the substrate and applying pressure or heat to densify the substrate in certain areas to form a watermark. Such methods are described in WO 99/14433 and WO 00/32874. The recesses can be made by laser. In the case of a region of variable opacity comprising microperforations 15 made in the fibrous substrate, the latter are preferably produced by laser. The intensity of the laser is chosen during manufacture so as to create a recess or not through the substrate without destroying the underlying security son or son. The use of a laser allows a greater precision in the pattern and its positioning and allows a customization of the latter.
    [0021] Safety Yarns The security yarn (s) may conventionally comprise a plastic support film, in particular a thermoplastic material, preferably polyester or polyethylene terephthalate (PET) film. Preferably, this support film is transparent. The width of the wire (s) can be between 0.5 and 15 mm, better still between 3 and 8 mm. The thickness of the support film can range from 6 to 60 cm. The support film can carry a metallization / demetallization on the substrate. least one of its faces, defining micro text or other visible patterns in transmitted light. The metal is, for example, aluminum, copper, nickel, gold, and / or silver. The support film may in particular carry a layer of metal deposited by a vacuum metallization technique, with zones demetallized to define the micro text or other patterns.
    [0022] The security son (s) may comprise at least one printing, in particular of a metallized, iridescent or luminescent ink. This impression can be carried by the face of the security thread facing the screened region and / or by the opposite face. The security son or son may have microreliefs, especially diffractive or refractive and in particular holographic. These microreliefs can be formed by embossing a varnish. The incorporation of the security son or son to the fibrous substrate may not generate extra thickness in the paper. Preferably, the one or more security threads extend between two opposite edges of the paper. The security son or son may have straight and parallel edges, or alternatively not straight, for example of curved shape. The security son or son may have a different color from that of the fibrous substrate to increase its visibility, especially through regions of low opacity present on the bridges and superimposed on the security son or son. The security son or son may have magnetic, electrical, photochromic, thermochromic, piezochromic properties, among others. The security son or son may comprise a luminescent compound, in particular fluorescent, visible or invisible in white light of the day. The luminescent compound may be incorporated into the bulk of the support film or be present only on its surface. The luminescent compound can fluoresce when excited by ultraviolet (UV) or infrared (IR) light. This can increase the security and facilitate the authentication of the document. In particular, the fluorescence or luminescence may be detectable in regions of low opacity present on the bridges of the fibrous substrate and superimposed on the security son or son, and may form a fluorescent or luminescent pattern. The security son or son may still have characteristics perceptible to the touch. The security son or son can thus create a tactile effect, for example by embossing a varnish deposited on the surface of the support film or by depositing 30 by printing a layer comprising large particles. The tactile effect is particularly noticeable in the windows of the fibrous substrate where the son or son are on the surface.
    [0023] The security son or son may comprise one or more optically variable elements such as holograms, liquid crystals, interferential multilayer structures, iridescent pigments and combinations thereof. These optically variable elements may be visible in the windows of the fibrous substrate 5 and may also appear at least partially in the regions of low opacity present on the bridges of the fibrous substrate superimposed on the security son or son. The security son or son may include, where appropriate, at least one electronic device, including RFID. Secure document The invention also relates to a secure document comprising a paper according to the invention. This secure document can be a means of payment, such as a bank note, a check or a restaurant ticket, an identity document such as an identity card or a visa or a passport or a driver's license, a lottery ticket, a transport ticket or an entrance ticket to cultural or sports events. The document can have a single window or alternatively several windows, depending on its width and the distance separating two consecutive windows during the manufacture of the paper. When the document has only one window, however, the areas of the substrate covering the wire or wires and which extend either side of the window in the longitudinal direction of the wire or wires of "bridges" are nevertheless described. ". The invention also relates to a method for manufacturing a security paper according to the invention, comprising the step of: bringing at least one safety thread into contact with a jet-forming fabric of paper, having one or more first formation zones of one or more windows, and one or more second formation zones of one or more bridges extending between the windows on the formed paper, and at least one openwork mask having solid regions arranged as the portions of lower opacity of a region of variable opacity, this openwork mask being disposed in one of the second zones.
    [0024] The forming fabric may be a web of a flat-table or, preferably, round-shaped filigree roller as disclosed in WO 93/08327. The forming fabric may comprise recessed reliefs defining the zones of formation of the bridges. The windows are preferably formed by protrusions projecting from the forming fabric. In this case, when it is desired to achieve regions of variable opacity at the windows, it is possible to have on these protruding reliefs openwork masks for forming regions of corresponding variable opacity. In a variant, the paper forming fabric does not have protruding reliefs and the windows are made with the masks themselves.
    [0025] In order to achieve the regions of variable opacity on the bridges extending between the windows, the openwork masks can be arranged in the recessed reliefs of the paper-forming fabric. Very thin masks can then be used to produce the watermarks of the regions of variable opacity because the masks are protected from the stresses and mechanical stresses likely to degrade them by their position set back on the fabric, which prevents them from contact with the surface. or the threads. The thickness of a mask is preferably less than or equal to 1 mm, preferably between 0.2 and 0.8 mm. The perforated masks may be made by machining, injection, sintering, in particular laser sintering, in particular SLS (Selective Laser Sintering) or SLM (Selecting Laser Melting), or 3D printing. The machining technique is preferred for perforated masks which are not embossed, the SLM technique is preferred for perforated openwork masks. The subject of the invention is also, independently or in combination with the above, a manufacturing method. a security paper comprising at least one security thread integrated into windows, using a fabric for forming a papermaking substrate, which is preferably embossed and which has an alternation of recessed reliefs and reliefs projecting, which is characterized in that there is at least one formation mask of a variable opacity region in a recessed relief. Such a method is suitable for producing a region of variable opacity as defined above. The openwork mask may be made to form a watermark, including a screened watermark. Such an embodiment in itself presents an interest independent of the image restored by the watermark, whether screened or not, as this may make it possible to make the security thread or wires more visible at the level of the bridges. Such increased visibility is advantageous especially when the security son or son have a luminescence property, especially UV or IR fluorescence, or a different color of the substrate at bridges, because the light produced by luminescence or the color difference can produce an effect at the bridges, and especially at the level of the areas of least opacity of the bridges. The invention also relates, independently or in combination with the foregoing, to a method of manufacturing a security paper comprising at least one integrated security thread in windows in a substrate, in which the substrate is made on the substrate. level of the bridges extending between the windows at least one recess with the aid of a laser. When the recess or recesses are made on a bridge, the thickness of the substrate extending between the security thread and the surface of the paper is thus locally reduced, and the visibility of the at least one wire can be improved at the level of bridges, with the same advantages as those mentioned above.
    [0026] The thickness of the fibrous substrate may, locally, be sufficiently small for the safety thread (s) to be visible by transparency of the fibrous substrate. It is also possible, in addition, laser to produce recesses in the substrate along the son or son at the windows, in particular on each side of the son or son; It is thus possible to produce regions of variable opacity as defined above, contributing in particular to modifying the appearance of the substrate, which may facilitate the identification of the son or son by the observer and make the paper more visually appealing. A portion of the recesses may be through to locally allow visibility in reflected light of the underlying security son or son. The invention also relates, in another of its aspects, to a security paper comprising a fibrous substrate and at least one security thread integrated in windows, the fibrous substrate having at least one region of variable opacity screened at least partially at a bridge of the fibrous substrate extending between two successive windows along the at least one security thread and / or appearing to border the at least one wire at at least one window when the paper is observed in transmitted light.
    [0027] The region or regions of variable opacity may be spread exclusively at the level of the window or windows, without overflowing on the bridges extending between the windows.
    [0028] The region or regions of variable opacity may be spread on each side of the security son or son at each window, no region of variable opacity halftone extending on a bridge. The fibrous substrate may comprise a plurality of distinct raster variable opacity regions. The regions of variable opacity may be framed exclusively at bridges or exclusively border the son or at the windows of the fibrous substrate. Within each window, the son or son may be bordered by a halftone variable opacity region. Alternatively, the rasterized opacity regions may border the one or more wires at one window every n windows, where n is an integer greater than one. The invention also relates, in another of its aspects, to a security paper comprising a fibrous substrate and at least one security thread integrated into windows, the fibrous substrate having at least one region of variable opacity constituted by a watermark or multiton pseudo-watermark located at least partially at a bridge of the fibrous substrate extending between two successive windows along the at least one security thread and / or appearing to border the at least one wire at less a window when the paper is observed in transmitted light. The one or more watermarks or pseudo-watermarks multitons can be rasterized, it is in particular a watermark known as "multiton effect".
    [0029] The multiton watermark or pseudo-watermark can extend exclusively along the wire at the window (s) without overflowing the bridges extending between the windows. The one or more multiton watermarks or pseudo-watermarks can extend on either side of the security thread (s) at each window, no multitrack watermark or pseudo-watermark extending over a bridge. The fibrous substrate may comprise a plurality of watermarks or pseudo-watermarks multitons. According to this aspect of the invention, multiton watermarks or pseudo-watermarks can exclusively be located at the bridges or exclusively border the son or son in the windows of the fibrous substrate. The yarn (s) may be lined at each window by a watermark or pseudo-multi-thread watermark. Alternatively, the multiton watermarks or pseudo-watermarks can border the son (s) at a window, all n windows, n being an integer greater than one.
    [0030] The characteristics described above, in particular with regard to the substrate and the safety wire or wires, are also applicable to these other aspects of the invention. The invention also relates to a method of manufacturing a security paper 5 comprising at least one security thread integrated into windows in a substrate, comprising the step of bringing the at least one security thread into contact with a paper jet forming web, having one or more first formation areas of one or more windows, and one or more second formation zones of one or more bridges extending between the windows on the formed paper and at least one apertured mask 10 having solid regions arranged as the portions of lower opacity of a multitone or watermarked watermark, this openwork mask being disposed in the e of the first and second areas. The windows may be formed by protrusions projecting from the forming fabric and the openwork mask (s) may be arranged on the protruding reliefs. Alternatively, the windows are formed by the masks. The subject of the invention is also a method of forming a security paper comprising at least one integrated security thread in windows, using a fabric for forming a papermaking substrate, which is preferably embossed, and which has an alternation of raised reliefs and protruding reliefs, which is characterized by the fact that at least one perforated mask for the formation of a multitone or woven filigree is provided on a protruding relief or in an embossed relief, preferably with the at least one security thread not coming into contact with the mask if it is disposed in a recessed relief. The invention also relates to a method of manufacturing a security paper comprising the steps of: bringing at least one security thread into contact with a web for forming a paper jet, comprising one or more first zones forming one or more windows; and one or more forming zones of one or more bridges extending between the windows on the formed paper, to have a paper with at least one integrated security thread, and embossing a window and / or a bridge to form a watermark, including a multitone watermark.
    [0031] The invention may be better understood on reading the following detailed description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which: FIG. 1 shows schematically, in front view, the front of a secure document comprising a security paper according to the invention; - Figure 2 schematically illustrates an example of arrangement of the regions of variable opacity according to the invention, FIGS. 3 to 5 are views similar to FIG. 2, alternative embodiments, FIGS. 6A to 6C show alternative arrangements of regions of variable opacity relative to the security thread, FIGS. 7A to 7C represent examples. , among others, raster points that may be present within raster regions of variable opacity; FIG. 8 schematically and partially illustrates a papermaking machine 15 according to the invention, FIGS. 9 to 11 show examples of arrangements of the openwork masks on the forming fabric; FIGS. 12 to 14 are sections respectively according to XII-XII, XIII-XIII and XIV-XIV of FIG. 1, FIGS. and 16 are sections respectively according to XV-XV and XVI-XVI of FIG. 3; FIG. 17 illustrates in section an example of region of variable opacity superimposed on the security thread, FIG. 18 illustrates in front view, observed in reflected light, a variant of security paper, - Figure 19 is a section along XIX-XIX of Figure 18, - Figure 20 is a view similar to Figure 18 showing a variant of security paper, Figure 21 is a section according to XXI-XXI of FIG. 20, FIG. 22 is a section along XXII-XXII of FIG. 18, FIG. 23 is a view similar to FIG. 2, of an alternative embodiment, FIG. FIG. 24 is a section along XXIV - XXIV of FIG. 23, and FIG. and a section according to XXV-XXV of FIG. 23. FIGS. 1 and 12 show a secure document 1 according to one aspect of the invention, such as a bank note, made from a security paper 4 5 having a fibrous substrate 8 incorporating a security thread 7 integrated into windows. The security paper 4 has windows 10 in which the security thread 7 is on the surface of the substrate 8 and the bridges 13 where the security thread 7 is covered by the fibrous substrate 8. According to this aspect of the invention, the fibrous substrate 8 comprises at least one region of variable opacity 16, in this case a succession of such regions 16 arranged exclusively at the windows 10 in the example of FIG. 1. These regions 16 make it possible in particular to attract attention of the observer to the security thread 7, when the document 1 is observed in transmitted light, for example according to the arrow O of FIG. 12. The regions of variable opacity 16 consist of framed regions in the example considered. The windows 10 may be formed by at least a portion of a hollow relief 17 of the fibrous substrate 8 and the bridges 13 may be formed by a solid portion of the fibrous substrate 8, for example at the same height in the direction of the As a variant, the bridges 13 may be formed by a portion of a relief projecting from the fibrous substrate with respect to the vellum, in particular by a portion of greater height in the direction of the thickness than the Vellum As illustrated in Figure 13, the recessed relief 17 may be wider w + d2 than the wire w. The security thread 7 extends continuously between the two opposite edges 19 and 22 of the security paper 4, preferably the long sides of the document. As illustrated in FIGS. 1 and 2, the regions of variable opacity 16 extend on either side of the wire at each window 10. Preferably, the regions of variable opacity 16 extend only in the The regions of variable opacity 16 do not extend in the longitudinal direction X of the wire 7 beyond the corresponding windows 10, and the bridges 13 are completely devoid thereof in this example.
    [0032] By way of example, the abscissa xd and xa show, in FIG. 2, the extent along the X axis of one of the bridges 13, by the abscissa xa and xb that of a adjacent window 10, and abscissa xb and xc that of the next bridge 13. It can be seen that the variable opacity region 16 associated with the window 10 between the abscissa xa and xi, does not extend along the X axis beyond this window. In the transverse direction, the regions of variable opacity 16 may extend over a distance d from the apparent edge of the wire 7 in the window 10, which may be greater than the width w of the wire 7. For example, w has been included between 3 and 8 mm and d between 0 and 37 mm The regions of variable opacity 16 may extend laterally at a recessed relief 17 over a distance p greater than the width w of the wire 7, as illustrated, the wire being for example centered or not with respect to the region or regions of variable opacity bordering it. In the case where the wire 7 is bordered on both sides by a region of variable opacity 16, as illustrated in FIGS. 1, 2 and 13 in particular, the two regions 16 may not necessarily extend over the same distance transversely. from the apparent edge of the wire 7. For example, with the notations present in FIG. 13, d1> d2 or d2> d1. Preferably, all the windows 10 are each associated with two regions 20 of variable opacity 16 visible on either side of the wire 7, as illustrated in FIG. 2, but it may be otherwise, and in particular it may not be possible. There should be only one region of variable opacity 16 associated with a single window 10 on one side of the wire, as shown in Figure 6C. It is possible to have all regions of variable opacity 16 located on the same side of the wire or regions alternately on either side of it.
    [0033] In the example of FIG. 2, the regions of variable opacity 16 are rasterized and no. The regions of variable opacity 16 visible on either side of the wire in the direction perpendicular to the X axis may have weft dots. 28 identical, and represent substantially the same patterns, being for example obtained using a single mask, as detailed below.
    [0034] Preferably, all regions of variable opacity 16 have identical weft points 28 and represent substantially the same pattern. The spacing t along the X axis between two successive bridges 13, namely the length of a window 10, is for example between 3 and 50 mm. The length m of a bridge 13 along the X axis is for example between 3 and 50 mm. According to another aspect of the invention, which corresponds to the variant illustrated in FIGS. 3, 15 and 16, the regions of variable opacity 16 are arranged on the bridges 13 and are at least partially superimposed on the security element 7. In this case, the regions of variable opacity 16 do not extend along the X axis 10 beyond the bridges 13 and the laterally bordering regions of the wire at the level of the windows 10 are devoid thereof, as illustrated in FIG. The regions of variable opacity 16 preferably extend over the entire length m of the bridge 13 along the X axis. As a variant illustrated in FIGS. 23 and 24, the regions of variable opacity 16 may extend on a bridge 13 along the axis X over a distance z less than the length of a bridge 13 along the axis X. As a result, the region of variable opacity 16 does not extend along the axis X over the entire length m of the bridge 13. Preferably, all the bridges 13 have a region of variable opacity 16. But it may be otherwise, and in particular, there may be only one region of variable opacity 16 arranged on a single bridge 13, all n bridges, with for example n 20 equal to two. The regions of variable opacity 16 may extend laterally at a bridge 13 over a distance p greater than the width w of the wire 7, as illustrated, the wire 7 being for example centered or not with respect to each halftone region. 16. As illustrated in FIGS. 23 and 25, the region or regions of variable opacity 16 may be arranged on a bridge 13 and the distance p relative to the lateral extension of the region or regions of variable opacity 16 may be less than the extent k of the bridge 13 perpendicular to the X axis, especially when the bridge 13 forms a relief of the vellum. Regions of variable opacity 16 may be raster regions of identical appearance.
    [0035] In the variant illustrated in FIG. 4, regions of variable opacity 16a extend along the X axis at the level of the windows 10 and regions of variable opacity 16b are arranged at the level of the bridges 13.
    [0036] In the example under consideration, a window 10 extends between the abscissa xa and x, d along the X axis of the wire and one of the adjacent bridges 13 between the abscissa xd and xe. The regions of variable opacity 16a extend on both sides of the window 10 between abscissas xb and xa, with xa <xb and x, <xd. For example, the variable opacity regions 16a and 16b may have weft dots, in particular weft points 28a and 28b, of the same shape, or variant, raster points of different shapes. Preferably, all the bridges 13 have a region of variable opacity 16b.
    [0037] Preferably, all regions of variable opacity 16b disposed on bridges 13 are constituted by screened clear watermarks. The regions of variable opacity 16b present on the bridges 13 may all be identical 28b frame points and represent substantially the same pattern. Similarly, the wire is lined at windows 10 by two regions of variable opacity 16a. Preferably, all the regions of variable opacity 16a at the windows 10 are constituted by screened clear watermarks. The regions of variable opacity 16a at the windows 10 may all be identical frame points 28a and represent substantially the same pattern. Preferably, the regions of variable opacity 16a and 16b have the same transverse dimension p, and the regions of variable opacity 16b extend continuously transversely to the wire 7. Preferably, all the windows 10 are of the same shape, especially rectangular, and substantially the same dimensions. Preferably, all the bridges 13 are of identical shape, in particular rectangular, of substantially the same dimensions. In the variant shown in FIG. 5, the fibrous substrate 8 comprises regions of variable opacity of different aspects at the level of the windows 10, with variable regions of fancy opacity 23 and 24. The substrate 8 comprises regions 25a. identical, which extend along the axis 30 X each a distance u at the windows 10, and 25b regions at the bridges 13, which extend over a distance z.
    [0038] The substrate 8 also comprises a region of variable opacity fancy 23 between two bridges 13, instead of a region 25a. We thus observe the succession, along the wire 7, a framed region 25a, a bridge 13, the framed region 23, a bridge 13, and a new framed region 25a.
    [0039] The region 23 has for example substantially the same extent u along the X axis as the regions 25a but an upper width o. It can be seen in FIG. 5 also that the regions 25a may be of rectangular contour while the region 23 has a different shape, for example hexagonal.
    [0040] The regions of variable opacity present on the bridges 13 may comprise, as illustrated, identical regions 25b and at least one fancy variable opacity region 24 all the n bridges 13 for example, with n being strictly greater than one. For example, the region 24 has the same extent z along the X axis as the regions 25b, but extends perpendicularly to the X axis over a smaller distance q. The regions of variable opacity 25b are, for example, rectangular in outline while the fancy region 24 is, for example, oblong with rounded ends, as illustrated. The windows 10 and / or the bridges 13 may be of other than rectangular contour, as illustrated in FIG. 6A.
    [0041] The windows 10 and / or the bridges 13 may have rectilinear transverse edges 26, as shown in FIG. 6A, or curves, as illustrated in FIG. 6B. Regions of variable opacity are preferably screened. Within a region of rasterized opacity, the raster points 28 may be of polygonal shape, in particular rectangular or square, as shown in FIG. 7A, oblong, as illustrated in FIG. 7B or circular, as illustrated in FIG. Figure 7C. Weft points 28 may all be identical in the same region of variable opacity, as shown in FIGS. 7B and 7C, or be different as shown in FIG. 7A. The region of variable dither opacity may be formed by identical screen dots which succeed each other at regular intervals in one or both directions of the plane. The largest dimension of a weft dot is for example between 0.2 and 1.0 mm.
    [0042] The smallest dimension of a raster dot, especially when the raster points consist of lines, is for example between 0.2 and 1.0 mm. In a variant, the region of variable opacity may be formed by frame points 28 of variable size which may or may not succeed each other at variable intervals.
    [0043] The region of variable opacity 16 may be a dithered, particularly multitone, watermark as described in application EP 1 122 360. Alternatively, the region of variable opacity 16 may form an identifiable pattern, including a portrait , an alphanumeric character, an animal, a plant, a monument or any other motive.
    [0044] Alternatively, the regions of variable opacity 16 may not be dithered but may be watermarks or pseudo-watermarks, preferably multitons. The watermarks or pseudofiligation can be made by embossing or as described in the application WO 2011/117828. The bridges 13 may further be formed by protruding reliefs and the windows 15 may be of the same height in the thickness direction as the vellum 9. The regions of variable opacity 16 are then arranged on the protruding relief or in the the space between two protruding reliefs. The security paper can be made with a round-shaped paper machine as shown in FIG. 8. Such a machine comprises a paper-forming fabric 33 which rotates in a vat 40 where there is a suspension of papermaking fibers. The forming fabric is embossed and has an alternation in the circumferential direction of recessed reliefs 38 and projecting reliefs 36. The security thread 7 is brought into contact with the forming fabric 33 and is unwound to accompany the rotation of it. The papermaking fibers fill the cavities 43 formed between the wire 7 and the bottom 25 of the recessed reliefs 38, where the wire is not in contact with the forming fabric 33. Thus, the cavities 43 allow the formation of the bridges 13 The security thread 7 comes into contact with the protruding reliefs 37 and locally hinders the accumulation of papermaking fibers on the fabric 33, which leads to the formation of the windows 10. In the configuration illustrated in FIG. making watermarks 30 at the level of the bridges 13 by virtue of the presence in the reliefs 38 of perforated masks 39 fixed to the surface of the forming fabric 33. These masks 39 locally modify the permeability of the fabric 33 and allow the formation of a watermark.
    [0045] The perforated masks 39 used are for example made by laser sintering according to the SLM technique, as disclosed in the application WO 2011/117828 A1 for example. The thickness of the perforated masks 39 is for example between 0.2 and 0.85 mm. With the arrangement of the masks 39 illustrated in FIG. 8, a result is obtained which corresponds for example to that represented in FIG. 3, where only the bridges 13 comprise a region of variable opacity 16. FIG. 9 corresponds to the configuration illustrated in FIG. Figure 8.
    [0046] To obtain a result such as that illustrated in FIG. 2, the masks 39 are placed on the protruding reliefs 36 of the forming fabric 33, as illustrated in FIG. 10. The recessed reliefs 38 are devoid of this, which means that allows the formation of bridges 13 of uniform thickness. Preferably, the projecting reliefs 36 are wider than the security thread 7. The masks 39 locally counteract the accumulation of paper fibers 15 and lead to the formation of watermarks corresponding to the regions of variable opacity 16. Each mask 39 has a dimension p, measured perpendicularly to the axis X. Where the wire 7 comes into contact with the mask 39, the paper fibers can not accumulate and the window 10 is formed. The mask 39 is preferably wider than the thread 7 and less wide than the projecting relief 36.
    [0047] To obtain the results illustrated in FIG. 2 or 3, respectively, all the projecting reliefs 36 and all the recessed reliefs 38 are provided with masks 39. In a variant, and to reduce the production time of the fitted fabric 33, may not provide a mask 39 as a projecting relief 36 or hollow 38 of n, with n> 1. In a variant of the manufacturing process, the forming fabric 33 is devoid of projecting reliefs 36 and recesses 38 and the relief necessary for the formation of the bridges 13 is obtained thanks to the thickness of the masks 39 on which the thread 7 comes in support. The presence of the masks prevents the accumulation of paper fibers in the areas where they are in contact with the security thread 7, thus forming windows. In the variant illustrated in FIG. 11, the forming fabric 33 is equipped with masks 39a and 39b which are preferably different, intended respectively for the formation of watermarks at the level of the windows 10 and the bridges 13. The result obtained is for example 3022489 27 shown in FIG. 4, with regions 16a at the level of windows 10 and regions 16b at the level of bridges 13. FIG. 17 illustrates the possibility for region of variable opacity 16 at a level of bridge 13, to include recesses 51 not going to the wire 7 and others 5 sufficiently deep to reach it. It may be advantageous for the yarn 7 to comprise at least one layer 52 of a luminescent or colored compound, for example deposited by printing on the wire support film 55. In this case, the presence of the recesses 50 and 51 may favor the excitation and / or observation of the luminescent or colored layer 52. FIGS. 18 to 21 show the possibility that the bridges 13 do not completely cover the safety wire 7 as described in the application EP 2 260 142. The fibrous substrate at the bridges may not fully cover the safety wire. As illustrated in FIGS. 18 and 19, at the level of the bridges, the fibrous substrate may not completely cover the safety wire and leave the apparent wire at the center of the bridge 13. The bridge 13 may comprise two parts 13a and 13b coming each partially cover a corresponding area 41 and 43 of the security thread 7. The central portion 45 of the security thread 7 remains visible. The regions of variable opacity can be made on the bridges 13, as illustrated, or border the wire at the windows 10. Preferably, the portions 13a and 13b of the bridges 13 symmetrically cover the safety wire with respect to the longitudinal axis X. Alternatively, the parts 13a and 13b are asymmetrical. The extent of overlap q of each portion 13a and 13b in the direction perpendicular to the X axis is for example greater than or equal to 1 mm or between 1 and 6 mm.
    [0048] In the variant illustrated in FIGS. 20 and 21, the bridges 13 partially cover the security thread from a single edge thereof. All bridges 13 may overlap the wire alternately from one edge of the wire and the opposite edge. Alternatively, the security paper 4 may comprise a plurality of security threads 7, preferably two security threads 7. The security threads 7 may be juxtaposed or not, and be integrated in the same windows 10 or not. thus extending for example side by side in the same window 10. The presence of two son has the advantage over a wider wire to facilitate the dewatering during the manufacture of the security paper 4. The region of variable opacity 16 may extend over a bridge 13 of the fibrous substrate 8 superimposed on the security son 7 and located between two successive windows 10 along the security son 7. The invention is not limited to the examples illustrated. In particular, the regions 5 of variable opacity, including raster, can be obtained otherwise than using watermarks. For example, the regions of variable opacity are made using a laser that makes recesses in the paper substrate. The depth of these recesses may be sufficiently small to maintain a certain thickness of substrate between the wire 7 and the bottom of the recess, which may reduce the risk of degrading the wire 7 with the laser when forming the wire. recess. The regions of variable opacity can also be made by localized localization of the fibrous substrate using suitable substances, such as oily compounds. The features of the illustrated examples can be combined within 15 variants not illustrated. The arrangement of regions of variable opacity may be different. Regions of varying opacity may not be present at all windows or on all decks. The expression "comprising one" is synonymous with "comprising at least one", except when the opposite is specified. 20
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A security paper having a fibrous substrate (8) and at least one window-integrated security thread (7) in said fibrous substrate, the fibrous substrate having at least one region of variable opacity (16; 16b; 25b, 24) at least partially extending on a bridge (13) of the fibrous substrate located between two successive windows (10) along the security thread.
    [0002]
    2. Security paper according to claim 1, the security son or son comprising a plastic support film, in particular thermoplastic material.
    [0003]
    3. Security paper according to claim 1 or 2, the region or regions of variable opacity being exclusively at or bridges (13).
    [0004]
    4. Paper according to any one of claims 1 to 3, the fibrous substrate having a region of variable opacity at each bridge (13)
    [0005]
    5. Paper according to any one of claims 1 to 3, the fibrous substrate having a variable opacity region all n bridges (13), with n integer greater than. a.
    [0006]
    Paper according to any one of the preceding claims, the fibrous substrate having at least one region of variable opacity (16; 16a; 25a; 23) appearing to border the son or son at at least one window (10). , when the paper is observed in transmitted light.
    [0007]
    7. Paper according to claim 4, the fibrous substrate having for each window (10) a variable opacity region which extends on either side of or son (s) (7) at this window.
    [0008]
    8. Paper according to claim 5 or 6, the fibrous substrate having a region of opacity variable all n windows (10), with n integer greater than 1.
    [0009]
    9. Security paper according to any one of the preceding claims, the fibrous substrate (8) having a plurality of regions of variable opacity (16; 16a; 16b) identical to each other, in particular reproducing at regular intervals on the substrate ( 8).
    [0010]
    10. Security paper according to any one of the preceding claims, each region of variable opacity (16; 16a, 16b) forming a main polygonal contour pattern. A paper according to any one of the preceding claims, each region of variable opacity being a halftone region. Security paper according to any one of the preceding claims, wherein the region or regions of variable opacity are constituted by a watermark, a pseudo-watermark and / or micro-perforations. 13. Security paper according to the preceding claim, the raster region or regions of variable opacity being each constituted by a watermark, including a set of light areas arranged to form a raster image having raster points (25). 14. Security paper according to any one of claims 1 to 12, the region or regions of variable opacity comprising microperforations of the fibrous substrate made by laser. Security paper according to any one of the preceding claims, wherein the security thread (s) (7) have optical properties of luminescence, preferably fluorescence. 16. Paper according to claim 15, the security thread having at least one luminescent zone superimposed on a zone of less opacity of the region of variable opacity. 17. Security paper according to any one of the preceding claims, the region of variable opacity having at least one recess (50) passing through the fibrous substrate revealing the son or son (7). 18. Security paper according to any one of claims 1 to 16, the substrate thickness (8) covering the son or son at a region of variable opacity located on a bridge (13) never being nothing. The security paper according to any one of the preceding claims, the variable opacity region having weft points (28) of identical shape, preferably arranged at regular intervals. Security paper according to any one of the preceding claims, having regions of variable opacity at the windows (10) and regions of variable opacity at the bridges (13), preferably with a gap between a region of variable opacity located at a window (10) and a region of variable opacity located at a bridge (13). The security paper of claim 20 having at least one region of variable opacity at a window (10) that has a different appearance than a region of varying opacity at a location. bridge (13). 22, security paper according to any one of the preceding claims, having at least two regions of variable opacity of the same appearance associated with two respective windows or two bridges, and a third region of variable opacity (23; 24). associated with a window or bridge, different in appearance from other windows. 23. Security paper according to any one of the preceding claims, the bridges being each formed by at least a portion of a relief projecting from the substrate, the region or regions of variable opacity extending partially over the bridges, in particular extending longitudinally and / or transversely over a distance less than that of the bridges. 24. Secure document comprising security paper according to any one of the preceding claims. 25. A method of manufacturing a security paper, especially as defined in any one of claims 1 to 23, comprising the step of bringing at least one security thread (7) into contact with a fabric ( 33), having one or more first (38) forming zones of one or more windows (10), and one or more second zones (37) for forming one or more bridges. (13) extending between the windows (10) on the formed paper, and at least one perforated mask (39) having solid regions arranged as the parts of lower opacity of a region of variable opacity, this openwork mask being disposed in one of the second zones. 26. The method of claim 25, the forming fabric being a round-shaped web having recessed reliefs (38) defining the forming areas of the bridges (13). 27. Method according to one of claims 25 and 26, the windows (10) being formed by projecting reliefs (37) of the forming fabric (33). 28. The method of claim 26, wherein openwork masks (39) for forming regions of varying opacity are provided in the recessed reliefs of the paper forming fabric. 29. A method according to any one of claims 25 to 28, the fabric (33) comprising at least one perforated mask (39) having solid regions arranged as the parts of lower opacity of a variable opacity region. , this openwork mask being disposed in one of the first zones (38), in particular on a protruding relief (37) 5 of the forming fabric. 30. A method according to any one of claims 25 to 29, the perforated masks being made by machining, injection or sintering. 31. The method of claim 30, the perforated masks (39) being made by laser sintering, preferably SLM (Selecting Laser Melting) 32. A method of manufacturing a security paper comprising at least one security thread (7) integrated in windows, using a web (33) for forming a papermaking substrate, which is preferably embossed, and which has an alternation of raised reliefs and protruding reliefs, which is characterized by the fact that at least one openwork mask (39) for forming a region of varying opacity in a recessed relief (38), preferably with at least one safety thread (7) not coming mask contact (39). 33. Process according to claim 32, characterized in that at least one open-air mask (39) for forming a variable opacity region is provided on a protruding relief (37), preferably with the security son coming into contact with the mask (39) disposed on the protruding relief. 34. The method of claim 32 or 33, the mask being made to form a watermark, including a screened watermark. 35. Method according to claim 32 or 33, several masks (39) being placed exclusively within the recessed reliefs so as to produce a paper having at least one integrated wire in windows where the bridges (13) have an opacity different from that 25 vellum, because of the presence of watermarks on the bridges (13). 36. A method of manufacturing a security paper comprising at least one security thread (7) integrated in windows in a substrate, in which is made on the substrate at the bridges (13) extending between the windows (10). ) at least one recess (51, 50) with a laser, and / or laser recesses in the substrate along the at least one wire at the windows (10), in particular on each side of the at least one wire (7). 37. A method of manufacturing a security paper as defined in any one of claims 1 to 23, including the step of: bringing at least one security thread (7) in contact with a canvas (33) for forming a paper jet, having one or more first regions (38) for forming one or more windows (10), and one or more second zones (37) for forming one or more bridges (13) extending between the windows (10) on the paper formed to have a paper with at least one security thread (7), integrated, and embossing a bridge (13) to form a watermark, including a multitone watermark . 38. A security paper comprising a fibrous substrate (8) and at least one security thread (7) integrated into windows in this fibrous substrate, the fibrous substrate having at least one region of variable opacity (16; 16a, 16b 25a, 25b, 23, 24) located at least partially at a bridge (13) of the fibrous substrate extending between two successive windows (10) along the at least one security thread and / or appearing to border the at least one wire at at least one window (10) when the paper is viewed in transmitted light. 39. A security paper comprising a fibrous substrate (8) and at least one security thread (7) integrated in windows in this fibrous substrate, the fibrous substrate having at least one region of variable opacity constituted by a watermark or a pseudo-opaque multiton watermark (16; 16a, 16b; 25a, 25b, 23, 24) located at least partially at a bridge (13) of the fibrous substrate extending between two successive windows (10) along the at least one security thread and / or appearing to border the at least one thread at at least one window (10) when the paper is observed in transmitted light. 40. A security paper according to claim 38 or 39, wherein the one or more regions of variable opacity are located exclusively at the bridge (s) (13) or extend exclusively along the window (s) (10) without overflowing. on the bridges (13) extending between the windows. 41. The paper of claim 40 wherein the fibrous substrate has a region of variable opacity at each bridge (13) or window (10). 42. Paper according to any one of claims 38 to 41, the security thread or son (7) being superimposed on a region of variable opacity only at the level of the bridges (13). 43. A security paper according to any one of claims 38 to 42, the fibrous substrate (8) having a plurality of regions of variable opacity (16; 16a; 16b) identical to each other, in particular reproducing at regular intervals. on the substrate, the regions of variable opacity each forming a polygonal contour pattern. 44. The security paper according to any one of claims 38 to 43, the region or regions of variable opacity being constituted by a watermark or a pseudo-watermark comprising a set of light areas arranged to form a raster image. 45. A security paper according to any one of claims 37 to 43, having regions of variable opacity at the windows and regions of variable opacity at the bridges (13), preferably with a gap separating a region of variable opacity located at a window and region of variable opacity located at a bridge (13). 46. The paper of claim 45 having at least one region of variable opacity at a window (10) that has a different appearance than a region of variable opacity at a bridge (1). 3). 47. A method of manufacturing a security paper, particularly as defined in any one of claims 38 to 46, comprising the step of bringing at least one security thread (7) into contact with a fabric ( 33) for forming a paper jet having one or more first (38) forming regions of one or more windows (10), and one or more second zones (37) for forming one or more bridges ( 13) extending between the windows (10) on the formed paper, and at least one perforated mask (39) having solid regions arranged as the lower opacity portions of regions of variable opacity, this openwork mask being disposed in one of the first and second zones. 48. The method according to claim 47, wherein the forming fabric is a round-shaped fabric having recessed reliefs (38) defining the forming areas of the bridges (13) and / or protruding reliefs defining the formation areas of the windows (10). 49. A method according to claim 48, wherein perforated masks (39) for forming regions of varying opacity are provided in the recessed reliefs and / or protruding projections of the paper-forming fabric. 50. A method of manufacturing a security paper as defined in any one of claims 38 to 46, comprising the step of: bringing at least 3022489 a security thread (7) in contact with a fabric ( 33), having one or more first (38) forming regions of one or more windows (10), and one or more second formation zones (37) of one or more bridges ( 13) extending between the windows (10) on the formed paper to have a paper with at least one integrated security thread (7), and embossing a window (10) and / or a bridge (13) to form a watermark, including a multitone watermark.
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    同族专利:
    公开号 | 公开日
    ES2708980T3|2019-04-12|
    EP3157756A1|2017-04-26|
    WO2015197617A1|2015-12-30|
    EP3157756B1|2018-11-14|
    HUE043052T2|2019-07-29|
    FR3022489B1|2021-10-29|
    CN106605022A|2017-04-26|
    RU2683653C2|2019-04-01|
    RU2016150895A|2018-07-27|
    PL3157756T3|2019-03-29|
    BR112016030391A8|2020-04-07|
    KR20170023064A|2017-03-02|
    CN106605022B|2019-11-12|
    RU2016150895A3|2019-02-07|
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    法律状态:
    2015-06-19| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-25| PLSC| Publication of the preliminary search report|Effective date: 20151225 |
    2016-06-27| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-20| PLFP| Fee payment|Year of fee payment: 5 |
    2018-12-07| TP| Transmission of property|Owner name: OBERTHUR FIDUCIAIRE SAS, FR Effective date: 20181031 |
    2020-06-19| PLFP| Fee payment|Year of fee payment: 7 |
    2021-06-22| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1455780A|FR3022489B1|2014-06-23|2014-06-23|SECURITY PAPERS AND MANUFACTURING METHODS.|FR1455780A| FR3022489B1|2014-06-23|2014-06-23|SECURITY PAPERS AND MANUFACTURING METHODS.|
    PL15730797T| PL3157756T3|2014-06-23|2015-06-23|Security papers and processes of their manufacturing|
    BR112016030391-1A| BR112016030391B1|2014-06-23|2015-06-23|SECURITY PAPER, MANUFACTURING METHOD AND PROTECTED DOCUMENT|
    PCT/EP2015/064114| WO2015197617A1|2014-06-23|2015-06-23|Security papers and methods of manufacture|
    HUE15730797A| HUE043052T2|2014-06-23|2015-06-23|Security papers and processes of their manufacturing|
    RU2016150895A| RU2683653C2|2014-06-23|2015-06-23|Security paperand methods for manufacture thereof |
    CN201580045539.1A| CN106605022B|2014-06-23|2015-06-23|Antifalsification paper and manufacturing method|
    EP15730797.6A| EP3157756B1|2014-06-23|2015-06-23|Security papers and processes of their manufacturing|
    ES15730797T| ES2708980T3|2014-06-23|2015-06-23|Safety papers and manufacturing procedures|
    KR1020177000262A| KR20170023064A|2014-06-23|2015-06-23|Security papers and methods of manufacture|
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