IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0054575
(2008-07-17)
|
등록번호 |
US-8389092
(2013-03-05)
|
국제출원번호 |
PCT/SE2008/050881
(2008-07-17)
|
§371/§102 date |
20110118
(20110118)
|
국제공개번호 |
WO2010/008331
(2010-01-21)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
1 |
초록
A stack includes one or more web-shaped materials, at least one of the web-shaped materials having a visual pattern, wherein a similar pattern is seen as an edge pattern on a face side of the stack. There is also provided a method to produce such a stack.
대표청구항
▼
1. A stack formed from an intermediate web, said stack having a first face side and a second face side, said first and second face sides facing in opposite directions, said first face side comprising a first plurality of edge portions formed by a first set of folds in said intermediate web and said
1. A stack formed from an intermediate web, said stack having a first face side and a second face side, said first and second face sides facing in opposite directions, said first face side comprising a first plurality of edge portions formed by a first set of folds in said intermediate web and said second side face comprising a second plurality of edge portions formed by a second set of folds in said intermediate web, said edge portions having a thickness (t), said intermediate web comprising at least a first web-shaped material having a web extension direction, said first web-shaped material being provided with a first visible pattern having a repeat length (r) in said web extension direction of said first web-shaped material, whereinadjacent folds of said first set of folds are separated by a distance L in the web extension direction along said first web-shaped material and adjacent folds of said second set of folds are separated by said distance L in the web extension direction along said first web-shaped material such that the distance L satisfies the equation: L=n·r+k·t where n is a positive integer, r is said repeat length, t is said edge portion thickness and k is a constant, with k being selected such that an edge pattern is formed on at least one of said first and second face sides of the stack, which edge pattern approximates said first visible pattern on the first web-shaped material. 2. The stack according to claim 1, wherein both face sides of said stack fulfil the equation L=n·r+k·t as previously defined. 3. The stack (1) according to claim 1, wherein the absolute value of the coefficient k (|k|) fulfils 0.5<|k|<2, and n is an integer from 1 to 20. 4. The stack according to claim 3, wherein the coefficient k is essentially equal to +1, and n is an integer from 1 to 10. 5. The stack according to claim 4, wherein n is an integer from 1 to 5. 6. The stack according to claim 1, wherein the first visible pattern comprises distinct decorative elements. 7. The stack according to claim 1, wherein substantially all folds are substantially perpendicular to the web extension direction. 8. The stack according to claim 1, wherein the folds are substantially perpendicular to a machine direction of the first web-shaped material. 9. The stack according to claim 1, wherein at least some of the edge portions comprise separation lines. 10. The stack according to claim 1, wherein the majority of the visible edge portions are formed by folded web-shaped material of said first web-shaped material. 11. The stack according to claim 1, wherein the intermediate web comprises two web-shaped materials including said first web-shaped material and a second web-shaped material, which are interfolded with each other. 12. The stack according to claim 1, wherein the intermediate web comprises two web-shaped materials, said first web-shaped material forming a first planar surface of the intermediate web and a second web-shaped material forming an opposing second planar surface of the intermediate web, said first planar surface having the first visible pattern, said second planar surface having a second visible pattern, and each said planar surface fulfilling L=n·r+k·t, as previously defined, independent of the other planar surface. 13. The stack according to claim 1, wherein the intermediate web comprises separate sheets, having three, four or more panels, and wherein two consecutive separate sheets overlap each other by at least essentially one panel. 14. The stack according to claim 1, wherein said first web-shaped material has a thickness (d) of at least 200 μm. 15. The stack according to claim 1, wherein said first web-shaped material is made of through-air-dried paper, and has a thickness (d) of at least 250 μm. 16. A method of forming a stack having a first visible pattern by folding an intermediate web, said stack having a first face side and a second face side, said first and second face sides facing in opposite directions, each of said face sides comprising a plurality of edge portions formed by folds in said intermediate web, said edge portions having a thickness (t), said method comprising the steps of:applying said first visible pattern to a first web-shaped material, having a web extension direction, said pattern having a repeat length (r) in the web extension direction of said first web-shaped material,forming said intermediate web from said first web-shaped material,folding said intermediate web in an accordion-like manner along a first set and a second set of folds extending in an edge direction being perpendicular to the web extension direction, said first set of folds forming said plurality of edge portions of the first face side of said stack and said second set of folds forming said plurality of edge portions of the opposite second face side of the stack, each fold of each set of folds being separated by a distance L in the web extension direction along said first web-shaped materialwhereinsaid folding of said intermediate web being carried out such that the distance L satisfies the equation: L=n·r+k·t where n is a positive integer, r is said repeat length, t is said edge portion thickness and k is a constant, with k being selected such that an edge pattern is formed on at least one of said first and second sides of the stack, which edge pattern approximates said first visible pattern on said first web-shaped material. 17. The method according to claim 16, wherein both face sides of said stack fulfil L=n·r+k·t as previously defined. 18. The method according to claim 16, wherein the absolute value of the coefficient (|k|) fulfils 0.5<|k|<2. 19. The method according to claim 18 wherein the coefficient (k) is essentially equal to +1. 20. The method according to claim 16, further comprising the steps of: applying a second visible pattern to a second web-shaped material, said second visible pattern being similar to said first visible pattern or different,forming the intermediate web of said first and second web-shaped materials,interfolding said first and second web-shaped materials when folding the intermediate web, the first web-shaped material forming a first planar surface of said intermediate web and the second web-shaped material forming the opposing planar surface of said intermediate web, each of said planar surfaces thus having a visible pattern and fulfilling the equation L=n·r+k·t, as previously defined, independent of the other planar surface. 21. The method according claim 16, further comprising the step of: perforating or cutting the intermediate web at separation lines, wherein the distance between separation lines is chosen to provide sheets of a suitable size. 22. The method according to claim 21, wherein the separation lines are located so that each sheet overlaps the following sheets by at least about one panel.
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