• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    STACK OF PRODUCTS OF ABS0ORVENT FOLDED SHEETS INTERLATED. The invention relates to a stack of absorbent sheet products folded in between, wherein the stack comprises a plurality of absorbent sheets each of which, in itself, is folded at least twice around axes that are perpendicular to each other. Each sheet comprises a first fold that is offset from a line parallel to the first fold that divides the sheet in half, and a second fold that divides the sheet in half in a direction perpendicular to the first fold. Each sheet is folded in such a way that the displaced portions of the sheet are positioned inside the sheet when folded. The absorbent sheets preferably have an embossed surface in a predetermined pattern or configuration. Each of the absorbent sheets within the stack comprises at least one pair of sandwiched panels between a pair of adjacent panels of another absorbent sheet in the sheet stack.
    公开号:BR112013010453B1
    申请号:R112013010453-8
    申请日:2011-10-28
    公开日:2020-12-01
    发明作者:Formon John S.；Albrecht Frederick R
    申请人:Essity Hygiene And Health Aktiebolag；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The invention relates to a stack of interleaved folded absorbent sheet products and preferably, but not necessarily, to a stack of interleaved folded paper napkins bearing a predetermined pattern transmitted by stamping or drying formation Through-Air (“TAD”), or by a structured tissue paper technique. BACKGROUND OF THE INVENTION
    [002] In commercial food service establishments and public restrooms, folded paper products such as paper napkins are usually supplied in packages from which the products can be removed by the customers of those establishments. Considering that high quality paper napkins are invariably "controlled by the attendant", that is, delivered individually by a waiter or waitress, it is desirable, nevertheless, to supply paper products, in the application dispensed by users, that are perceived to be of relatively higher quality.
    [003] Interleaved folded paper products, and especially interleaved folded paper napkins, have the advantage that they can be loaded into a dispenser whose front plate cooperates with the napkin stack to encourage users to remove one napkin at a time. This results in users removing fewer napkins than if it were possible to remove a group of napkins simultaneously or if they were encouraged to do so, although the stack of paper products according to the invention can be used in dispensers that promote distribution of one at a time or of a group.
    [004] Interleaved folded paper napkins applied to a distribution environment by the user include those that are folded only once. The patent literature describes a variety of interwoven folded paper napkin arrangements having parallel plural folds, for example, in US Patents US 5,118,554, US 6,090,467 and US 6,213,346.
    [005] Paper napkins that are folded only once (sometimes also called "semi-folded" when the fold divides the napkin in half, or "folded out" when not) have the disadvantage that, to achieve a certain absorption capacity total, the base weight of the unfolded napkin sheet must be relatively high. This in turn causes the napkin to have relatively low softness and low draping properties, both of which are important for the user's perception of the overall quality of the napkin. The provision of parallel plural folds on a napkin has the obvious limitation that the napkin will have a relatively elongated shape in the direction parallel to the folds, unless the initial blank is cut relatively relatively elongated in the direction perpendicular to the folds.
    [006] Such interleaved folded paper napkins also include those that are folded at least twice around axes that are perpendicular to each other, as described in US Joint Ownership Patent 7,611,765, the entire patent of which is hereby expressly incorporated as reference. In embodiments of this patent, in which there are two folds where each divides the base sheet of the napkin in half, the area of the unfolded sheet will be approximately four times greater than the folded napkin.
    [007] Published patent application US 2010/0055391 describes a set of folded sheet materials in which each sheet is first folded along a "median" fold and then folded in a perpendicular direction at a " fold offset ". However, an interleaved folded pile of such materials is subject to certain limitations with regard to appearance and distribution, as discussed herein. DESCRIPTION OF THE INVENTION
    [008] It is therefore an object of the invention to address and alleviate, at least in part, the disadvantages described above in relation to the aforementioned technique by providing a stack of interleaved folded sheet products, each of which is itself folded at least twice on the axes that are perpendicular to each other, the products, moreover, preferably, but not necessarily, comprise a relief surface with a certain pattern or design transmitted by printing or by TAD or by forming tissue paper structured.
    [009] The absorbent sheet products folded according to the invention comprise a first fold that is deliberately displaced parallel to a line that divides the sheet in half, and a second fold that divides the sheet in half preferably in the perpendicular direction.
    [010] The absorbent sheet products folded according to the invention are preferably single layer paper napkins having a basis weight of about 4.5 to 9.1 kg (10 to 20 lb) per folded sheet. More preferably, the base weight of the napkins according to the invention is about 5.0 kg (11lb) to about 7.7 kg (17 lb), even more preferably between about 5.4 kg (12lb) and about 6.8 kg (15 lb), and more preferably about 5.9 kg (13 lb). The basis weight expression in kg (lb), as used herein, is with reference to a stack of 500 single-layer unfolded sheets each measuring 61 by 91 centimeters (24 by 36 inches).
    [011] The term "absorbent sheet products" as used herein encompasses not only paper products such as paper towels, but also non-woven absorbent materials that are not normally classified as papers or fabrics. Such non-woven materials include pure non-woven and non-woven hybrid / pulp blankets whose properties are similar to those of tissue paper, but which are based, for example, on non-woven or airborne materials containing low amounts of synthetic fibers, binders, moisture resistance agents and the like. An example of such a material would be a wet woven or foamed nonwoven material, comprising at least 30% by weight of pulp fibers and at least 20% by weight of synthetic fibers or filaments. BRIEF DESCRIPTION OF THE DRAWINGS
    [012] Other objects, characteristics and advantages of the invention will be more evident after reading the following detailed description of preferred embodiments of the invention, made with reference to the respective drawings, in which: -Figure 1 (a) is a perspective view of an individual napkin unfolded according to a first embodiment of the present invention; -Figure 1 (b) is a detail that illustrates an embossing pattern applied to the opposite side of the napkin of Figure 1 (a); -Figure 1 (c) is a detail that illustrates an embossing pattern applied to the opposite side of the napkin of Figure 1 (a); Figure 2 is a perspective view of an individual napkin according to the embodiment of Figure 1 (a) of the present invention, in which only the second fold has been unfolded; Figure 3 is a perspective view of an individual napkin according to the embodiment of Figure 1 (a) of the present invention, in which no fold has been unfolded; Figure 4 (a) is a schematic representation of the interspersed folded configuration of a stack of folded absorbent sheet products according to the embodiment of Figure 1 (a); and - Figure 4 (b) is a schematic cross-sectional view of the napkin stack of the embodiment of Figure 4 (a). DESCRIPTION OF ACCOMPLISHMENTS OF THE INVENTION
    [013] In Figure 1 (a), a sheet of absorbent material (10) is described which has been folded according to the invention and then unfolded. The sheet of absorbent material, in this embodiment, before folding, preferably has dimensions of about 8.5 "x 11". However, these dimensions can of course be varied to suit the particular desired application of the product.
    [014] The sheet (10) is folded along a first fold (15), and then is folded a second time along a fold (20) that is perpendicular to the fold (15). The fold (15) is parallel to the short sides of the sheet (10), and therefore, in this embodiment, it is 8.5 "in length. When the absorbent sheet is a non-square rectangle, the first fold is preferably parallel to the short sides of the rectangle, and therefore perpendicular to the long sides.
    [015] The first fold (15) is deliberately moved from the line parallel to it that divides the sheet (10) in half. In this case, the fold (15) is displaced by about 2 "from that line, so that the length of the sheet (10) in this embodiment is approximately 6.5" from the fold (15) to the short side of the furthest leaf (10) (denoted "b" in Figure 1a), and about 4.5 ”from the fold (15) to the short side of the nearest leaf (10) (denoted" c "in Figure 1a The fold (15) will typically be located in such a way that the length "b" will be at most about three times the length "c", and at least about 1.1 times the length "c". Preferably, the length of "b" is at most twice the length of "c" and at least 1.3 times the length of "c".
    [016] The location of the first fold (15) can also be considered in terms of the degree of displacement between the two panels created by that fold, that is to say, the difference between the dimensions of "b" and "c", and , more particularly, the ratio of (bc) to (b + c), which expresses the shift in relation to the total length of the sheet. This proportion in the present embodiment is about 0.18 ((6.5-4.5) / (6.5 +4.5)). More generally, the ratio is preferably at least about 0.05 and at most about 0.48, and more preferably in the range of about 0.10 to about 0.33.
    [017] The second fold (20) divides the sheet (10) substantially in half, thus defining lengths of "a", which in the present embodiment, each of approximately 10.8 cm (4.25 "). The edges of the length panel "a" on the short side of the sheet (10) furthest away are designated (26) and (27) in Figure 1 (a).
    [018] As the width "a" of the panel is half the width of the short side of the unfolded absorbent sheet (when the sheet is different from the square), the length "a" will be at most half the sum of the lengths "b" and "c". When the unfolded sheet is a non-square rectangle, its width is, however, preferably greater than half its length and therefore the length "a" will preferably be at least a quarter of the sum of the lengths "b" and "c".
    [019] The folds (15) and (20) thus define four panels (25a), (25b), (25c) and (25d), in which the panels (25a) and (25b), in this embodiment, each have dimensions of approximately 16.5 cm x 10.8 cm (6.5 ”x 4.25”), while panels (25c) and (25d) each have dimensions of approximately 11.4 cm x 10.8 cm (4.5 "x 4.25").
    [020] Folds (15) and (20) are referred to herein as "first" fold and "second" fold, respectively. This designation refers not only to the sequence in which the folds are applied, but also to the shape of the folds themselves. In particular, the fold (15), being the first fold, is folded so as to have the unidirectional ridge. Thus, with reference to Figure 1a, the panels (25a) and (25b) of the unfolded sheet (10) as seen in this figure are both slightly angled upwards from fold (15), and so are the panels (25c ) and (25d).
    [021] On the other hand, the fold (20), being the second fold, is folded so as to have opposite ridges, which means that when the sheet (10) is unfolded, the panels (25a) and (25b ) of the unfolded sheet (10) are slightly angled upwards from the fold portion (22) that extends from the fold (15) to the shortest side farthest from the sheet (10), while the panels ( 25c) and (25d) of the unfolded sheet (10) are slightly angled downwards from the fold portion (21) that extends from the fold (15) to the shortest side closest to the sheet (10) when deployed.
    [022] The absorbent sheet according to the invention can have a variety of types, including, without limitation, dry crepe tissue paper; moist crepe tissue paper; creped TAD tissue paper (by dry air), non-creped TAD tissue paper; structured or textured tissue paper made using a process including the step of using pressure, vacuum, or airflow through the wet mat (or a combination of these) to conform the wet mat to a shaped fabric and subsequently dry the shaped sheet using a Yankee dryer, or a series of steam-heated dryers, or other means, including, but not limited to tissue paper made using the ATMOS process developed by Voith or the NTT process developed by Metso; tissue creped tissue paper, made through a process including the step of transferring the wet mat from a conveyor surface (belt, fabric, felt, or roll) moving at a speed to a fabric moving at a faster speed low (at least 5% lower) and subsequently dry the sheet. Those skilled in the art will recognize that these processes are not mutually exclusive, for example, a non-creped TAD process may include a creped tissue step in the process.
    [023] The absorbent sheets according to the invention are preferably embossed, particularly when they are in the form of paper napkins whose paper is formed in a traditional Yankee cylinder / dry creping line. As used herein, the term "relief" denotes a three-dimensional inset pattern of a distinct pattern or image. Such stamping can be applied by means of conventional stamping rolls, during the napkin manufacturing conversion phase, preferably upstream of folding and interleaving, and / or may be formed by a pattern selected from the TAD fabric, if the napkins are made by the TAD technique. Likewise, the term embossing as used herein may cover the pattern transmitted to the structure or tissue paper textured by the textured papermaking fabrics used to form them, regardless of whether the textured papermaking fabrics include additional distinct elements (see, for example, US Patent No. 7,624,765). The term "relief" as used herein, however, does not cover any accidental surface roughness transmitted to a napkin sheet by the forming fabric used in a traditional Yankee cylinder / dry creping line, where the surface roughness does not shows no predetermined pattern with the naked eye.
    [024] When the absorbent sheets according to the invention are engraved during a conversion phase, using embossing rollers, the embossing rollers will preferably be of the type on which a male pattern roll comprising all or most of the projecting embossing elements, and the other roll carries a feminine pattern comprising all or most of the recessed elements that cooperate with reliefs.
    [025] In Figure 1b, a detail of the obverse side of the sheet (10) is shown, illustrating an engraving pattern composed of an infinity of relief elements (30) that project from the intact plane of the sheet (10). The elements (30) thus form the "male" side of the embossed sheet (10), and consequently are formed by the sheet (10) when passing between the embossing rollers, with the obverse side in contact with the female roller.
    [026] On the other hand, in Figure 1c, a detail of the reverse side of the sheet (10) is shown, illustrating an engraving pattern composed of an infinity of relief elements (40) that are recessed from the intact plane of the sheet (10 ). In fact, the relief elements (30) and (40) are typically the same structure, as seen from opposite sides of the sheet (10). The elements (40) thus form the "female" side of the embossed sheet (10), and are consequently formed by the passage of the sheet between embossing rollers, with the reverse side, in contact with the male cylinder .
    [027] It is preferable to form folds (15) and (20) such that the male projections (30) are located inside the folded napkin, and the female recesses (40) are on the outside of the napkin. This folding orientation in relation to the side of the embossing pattern serves to provide a better feeling of touch to the external surfaces of the napkin, providing improved absorption capacity due to the embossing.
    [028] Thus, with reference to Figure 1a, the fold (15) is formed in such a way that the obverse sides of the panels (25c) and (25d) are seated on the obverse sides of the panels (25a) and (25b) ( as shown in Figure 2).
    [029] In the case of TAD tissue paper or textured tissue or structure, the folding of the sheets is preferably carried out in such a way that the air side of the sheets is located inside the folded napkin, as described above in relation to the projections male, with the tissue side of the leaves being on the outer surfaces of the folded napkin, as described above in relation to the female recesses (40).
    [030] The specific embossed pattern engraved on the napkins according to the invention may vary according to the application of the invention, with that illustrated in US Co-Owned Design Patent No. D462,530 being a possibility. The embossing can be of a continuous pattern across the entire surface of the sheet, as is the case in Figure 6, or the engraving can be applied only to selected regions of the sheet, for example, along a periphery or edge of the same.
    [031] When the absorbent sheets according to the invention are to be used in a commercial establishment, such as a fast-food restaurant or a convenience store, it may be desirable that the napkins contain the name and / or logo of the establishment where napkins will be dispensed. In this case, the name and / or logo can be formed by stamping, or by printing the napkin with an ink that contrasts sufficiently with the color of the paper material, or by a combination of these techniques.
    [032] In Figure 2, the napkin in Figure 1a was unfolded along the edge (20), but not along the edge (15). Thus, the panels (25c) and (25d) visible in Figure 2 are on the back of the leaf (10), and contain the female reliefs (40), while the portions of panels (25a) and (25b) visible in Figure 2 they are on the obverse side of the leaf (10) and contain the male reliefs (30). As only the exposed exposed surfaces are the portions of the panels (25a) and (25b) not covered by smaller panels (25c) and (25d), the fold (20) is formed in order to bring the exposed portions of the panel in contact, such that the fully folded napkin looks as shown in Figure 3.
    [033] It should be noted that in the fully folded napkin only the reverse sides of the panels (25a) and (25b) are substantially visible, with only the reverse side of the panel (25a) being substantially visible in Figure 3. The edge regions of the napkin, as illustrated in Figure 3, are somewhat exaggerated for ease of understanding, but those skilled in the art will recognize that their appearance will be much less prominent in practice. Thus, the outer side of the napkin not shown in Figure 3, that is, the reverse side of the panel (25b) is substantially the mirror image of what is shown. Consequently, a user holding the folded napkin will substantially touch only the recessed reliefs (40).
    [034] Significantly, this folding configuration also conceals the different dimensions of the panels (25a) and (25b) in relation to the panels (25c) and (25d), because the displacement between the panels shown in Figure 2 is not substantially visible at a user when the napkin is also folded around the fold (20), as shown in Figure 3. It is also possible to form a fold (20) with the opposing ridge, such that the overlapping regions would be exposed in both the sides of the napkin fully folded.
    [035] Likewise, the fold (15) can be formed with the ridge arranged opposite to the situation shown in Figure 1a, with the consequence that the male protuberances would be exposed on the outer surfaces of the fully folded napkin.
    [036] The ability of the folding configuration according to the present invention to hide the offset fold is in contrast to the folded sheet materials described in Published Patent Application US No. 2010/0055391. This is because the fold that divides in half being formed first and the displacement fold formed second, the offset will always be outwardly visible on the fully folded sheet, regardless of whether the folds are formed to join the opposite surfaces or reverse side of the leaf.
    [037] The fully folded napkin illustrated in the present Figure 3, therefore, has dimensions of approximately 16.5 cm x 10.8 cm (6.5 ”x 4.25"). These are the same dimensions as the fully folded napkin in the preferred embodiment folded in four of US Patent 7,611,765 in co-ownership, however, in US Co-Ownership Patent 7,611,765, the napkin base sheet has dimensions of about 21.6 cm x 33.0 cm (8, 5 ”x 13”), while the napkin base sheet of the present embodiment is only about 21.6 cm x 28.0 cm (8.5 ”x 11”). Therefore, the present form of This embodiment provides a product that, at least in its completely folded configuration, is visually indistinguishable from the preferred napkin described in the previous patent, but which is made with about 15% less paper. In addition, as the thinnest part of the folded napkin occurs over only a minority of the length of the longest side of it, the tactile perception and performance of the guar danapo are not significantly affected.
    [038] Figure 4 (a) schematically shows the way in which the folded sheets of the invention can be folded interleaved to form a stack of folded and interleaved sheets according to the invention. As seen in Figure 4 (a), the interleaving of adjacent sheets is such that any given napkin within the stack receives, between a pair of adjacent panels of a given napkin, a pair of adjacent panels of each napkin above and below within the battery.
    [039] Such an interleaving arrangement is shown in the context of individual folded paper towels, in US Patents 1,427,420 and 1,632,446. A napkin folded in four interleaved is described in US co-owned patent 7,611,765. Interleaving machines are described in US Patents 3,285,599 and US 3,291,479, the totalities of which are expressly incorporated herein by reference.
    [040] In Figure 4 (b), it can be seen that napkins when folded interspersed within the stack alternate between napkins (50) oriented as in Figure 3, with the fold (15) being visible in the plane of the page, and napkins (60) oriented as if the napkin of Figure 3 was rotated 180 ° around an axis perpendicular to the napkin leaf, such that the edges (26) and (27) of the napkins (60) are visible in the plane of the page .
    [041] The interleaving arrangement shown in Figures 4 (a) and 4 (b) thus reveals another significant advantage of the folding arrangement according to the present invention, in which the overlapping panels of adjacent napkins are all of equal width " a "in the direction of interspersed fold. This is again in contrast to an arrangement described in Patent Application Publication No. US 2010/0055391, in which the folding configuration requires that in the stack of interspersed folded sheets each sheet overlaps unequally over each adjacent sheet. Consequently, when the stack is loaded in a dispenser in one direction, the appearance of a next sheet when dispensing an upstream sheet requires a pair of short panels to remove a pair of long panels, despite only partial overlap between the pairs. panel, while when the stack is loaded in the opposite direction, the edge of each next sheet will be the pair of short panels, which offers users only a small area for handling, with a consequent risk of cross contamination of the distributor surfaces.
    [042] In contrast, in the stack of folded napkins interspersed as shown in Figures 4 (a) and 4 (b), there is no difference between the top of the stack and the bottom, with which the napkins will be dispensed in the same way either battery is loaded in a dispenser with the top up or the bottom up.
    [043] As mentioned above, when the absorbent sheet products according to the invention are to be used in a convenience store or food establishment, in particular a fast food franchise, it is contemplated that the embossing may take the form a logo of the store or restaurant where the napkins will be used, alone or in combination with a decorative border.
    [044] The base weight of the absorbent sheet products according to the invention is preferably within the range of a high quality napkin, and thus less than that of the individual commercially available folded paper products, the greater the base weight of which puts it closer to the paper towel category. Preferred embodiments have a base weight of about 5.9 kg (13 lb), calculated as defined above. However, it will be appreciated by those skilled in the art that the base weight can vary within a broader range, from about 4.5 kg (10 lb) to 9.1 kg (20 lb) per unfolded sheet, most preferably between about 5.0 kg (11 lb) and about 7.7 kg (17 lb), and even more preferably from about 5.4 kg (12 lb) to about 6.8 kg (15 lb).
    [045] Although this range of base weights is greater than that normally used for facial tissue (where a base weight of 8% to 9 per fold is typical), it is distinctly less than the basic weights found on napkins / commercially available single-fold towels, which tend to have base weights greater than 9.1 kg (20 lb). While providing a paper napkin on which the sheet has a relatively low base weight, the napkin is folded to have at least four panels, and thus the invention provides a napkin that is comparatively softer and has improved draping properties over products single-fold.
    [046] The absorbent sheet products folded according to the invention are preferably discrete, that is, totally independent of each other. However, it is also within the scope of the invention that the pile of absorbent sheet products is interconnected by "tongues", with the pulling force, when removing a single sheet of absorbent product through a distribution opening, being greater than the force required to remove the connecting tabs. connect adjacent absorbent sheets.
    [047] When products that are interconnected via tongues, the interlayer device described here recommends that the stack of absorbent sheet products be formed with a pair of parallel "strips" such that alternating absorbent sheet products are joined , rather than consecutive absorbent sheets. This type of arrangement of parallel bands or blankets is described, for example, in US Patent 6,213,346.
    [048] The invention also contemplates the use of the new pile of absorbent sheet products in a variety of dispensers. An example is a distributor with a downward opening, such as that described in the jointly owned copending application serial number 10 / 660.659, the entirety of which is expressly incorporated herein by reference. Other examples are packages that have an opening directed upwards, or with a side opening. A dispenser with an opening directed upwards and adapted to dispense the absorbent sheet products according to the invention is described in US Patent 7,178,689, the whole of which is expressly incorporated herein by reference.
    [049] Although the present invention has been described in connection with several preferred embodiments thereof, it should be understood that these embodiments are provided merely to illustrate the invention, and should not be used as an excuse to limit the scope of protection conferred by the true scope of the attached claims.
    权利要求:
    Claims (17)
    [0001]
    1. STACK OF PRODUCTS OF ABSORBENT SHEETS (10) INTERFALLED FOLDING comprising absorbent sheets (10), each of which is itself folded at least twice around axes that are perpendicular to each other, with each sheet comprising a first fold (15) which is offset from a line that splits the sheet parallel to the first fold (15) and a second fold (20) that splits the first fold (15) and the sheet in half perpendicular to the first fold ( 15), characterized in that each of the sheets is folded in such a way that displaced portions of the sheet are positioned inside the sheet when folded, and in which each of the absorbent sheets (10) within the stack comprises at least one pair of sandwiched panels between one pair of adjacent panels of another of the absorbent sheets (10) inside the stack.
    [0002]
    2. STACK according to claim 1, characterized by the first and second folds (15, 20) defining four panels (25a, 25b, 25c, 25d) of equal width (a), two of the panels (25c, 25d) having a first length (b) and two of the panels (25a, 25b), having a second length (b) greater than the first length (c).
    [0003]
    STACK according to any one of claims 2 to 3, characterized in that the adjacent sheets are folded interspersed so that they overlap in a direction of the same width (a), such that each absorbent sheet (10) with the stack overlaps each adjacent sheet (10) to an equal extent.
    [0004]
    STACK according to any one of claims 2 to 3, characterized in that the first fold (15) is located in such a way that the second length (b) is at most three times the first length (c) and at least 1, 1 times the first length (c).
    [0005]
    A BATTERY according to any one of claims 2 to 3, characterized in that the first fold (15) is located in such a way that the second length (b) is at most twice the first length (c) and at least 1, 3 times the first length (c).
    [0006]
    6. BATTERY according to any one of claims 1 to 5, characterized in that each of the folded absorbent sheets (10) has dimensions of 10.8 cm (4.25 ") by 16.5 cm (6.5") .
    [0007]
    STACK according to any one of claims 1 to 6, characterized in that each of the unfolded absorbent sheets (10) has dimensions from 22 cm (8.5 ") to 28 cm (11").
    [0008]
    STACK according to any one of claims 1 to 7, characterized in that each of the absorbent sheets (10) is a single layer paper napkin with a basis weight of 4.5 to 9.1 kg (10 to 20 lb), preferably from 5.0 to 7.7 kg (11 to 17 lb), more preferably from 5.4 to 6.8 kg (12 to 15 lb) and, more preferably 5.9 kg (13 lb) .
    [0009]
    STACK according to any one of claims 1 to 8, characterized in that each napkin (50, 60) inside the stack receives, between two adjacent panels (25c, 25d) facing inwards, a pair of adjacent panels from each one of the two napkins arranged above and below the napkin in the stack respectively.
    [0010]
    10. STACK according to any one of claims 1 to 9, characterized in that each of the absorbent sheets (10) is completely detached from all the other absorbent sheets (10) within the stack.
    [0011]
    STACK according to any one of claims 1 to 9, characterized in that each of the absorbent sheets (10) is tongue-tied to one or two other absorbent sheets (10) within the stack.
    [0012]
    STACK according to any one of claims 1 to 11, characterized in that each of the absorbent sheets (10) comprises an embossed surface relief applied by embossing rollers during a conversion phase of the manufacture of absorbent sheet products (10).
    [0013]
    13. STACK according to claim 12, characterized in that the embossed relief surface is of a continuous pattern over a total surface of the absorbent sheets (10).
    [0014]
    14. STACK according to claim 12, characterized in that the embossed surface relief is applied only along a peripheral region of the absorbent sheets (10).
    [0015]
    STACK according to any one of claims 12 to 14, characterized in that the embossed pattern of the embossed surface comprises embossing elements (30, 40) that protrude from one side of each absorbent sheet (10) and are recessed in relation to to an opposite side of each absorbent sheet (10), each absorbent sheet (10) being folded in such a way that the outer panels (25a, 25b) of each absorbent sheet (10) when folded comprise the relief elements (40) that are recessed in relation to the opposite side of each absorbent sheet (10).
    [0016]
    16. BATTERY according to any one of claims 1 to 15, characterized in that each of the absorbent sheets (10) is a TAD tissue paper, structure or textured tissue paper, made using a process that uses pressure, vacuum, or flow of air through the wet screen, each of the absorbent sheets (10) having an air side and a fabric side.
    [0017]
    PACK according to claim 18, characterized in that each absorbent sheet (10) is folded in such a way that the outer panels (25a, 25b) of each absorbent sheet (10) when folded comprise the fabric side of each sheet absorbent (10).
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    US20120107544A1|2012-05-03|
    UA108270C2|2015-04-10|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-01-02| B25D| Requested change of name of applicant approved|Owner name: ESSITY HYGIENE AND HEALTH AKTIEBOLAG (SE) |
    2019-06-18| B06T| Formal requirements before examination|
    2019-08-20| B08F| Application fees: dismissal - article 86 of industrial property law|Free format text: REFERENTE A 8A ANUIDADE. |
    2019-12-10| B08G| Application fees: restoration|
    2020-05-26| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2020-08-18| B09A| Decision: intention to grant|
    2020-12-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/10/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/915,939|2010-10-29|
    US12/915,939|US8597761B2|2010-10-29|2010-10-29|Stack of interfolded absorbent sheet products|
    PCT/SE2011/051286|WO2012057694A1|2010-10-29|2011-10-28|Stack of interfolded absorbent sheet products|
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