Multi-ply embossed absorbent paper products
First Claim
1. A multi-ply absorbent sheet provided with primary undulations extending along a principal undulatory axis of said sheet, said primary undulations being laterally spaced apart a distance, S, said multi-ply absorbent sheet being provided with an emboss pattern comprising a plurality of design elements wherein up to about 50 percent of the surface area of said absorbent sheet is embossed, characterized in that each design element of said emboss pattern has a characteristic emboss element lateral width, W, and a characteristic emboss element, length, L, along a direction L′
- and wherein the ratio of W;
S for each design element is from about 1 to about 4.
5 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to embossing multi-ply paper products, for example, paper towels, tissue and napkins, in which an improved embossing arrangement is used which is particularly suitable for paper products which have been processed so as to impart undulations whose axes extend in a principal undulatory direction, typically in the machine direction. The absorbent sheet typically further includes undulations which extend in the cross (transverse direction) of the web such that the absorbent sheet has a biaxially undulatory structure. The undulations may be formed by the use of an undulatory creping blade. Defined parameters accommodate: the distance at which the undulations are spaced, the total surface area of the design (embossing) elements, the width and length of the embossing elements and the aspect ratio of the elements, as well as the angular orientation of the embossing elements with respect to the undulations.
80 Citations
60 Claims
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1. A multi-ply absorbent sheet provided with primary undulations extending along a principal undulatory axis of said sheet, said primary undulations being laterally spaced apart a distance, S, said multi-ply absorbent sheet being provided with an emboss pattern comprising a plurality of design elements wherein up to about 50 percent of the surface area of said absorbent sheet is embossed, characterized in that each design element of said emboss pattern has a characteristic emboss element lateral width, W, and a characteristic emboss element, length, L, along a direction L′
- and wherein the ratio of W;
S for each design element is from about 1 to about 4. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- and wherein the ratio of W;
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32. A multi-ply sheet provided with primary undulations extending along a principal axis of said sheet, said primary undulations being laterally spaced apart a distance, S, said multi-ply absorbent sheet being further provided with an emboss pattern comprising a plurality of embossments of width, W, and length, L, wherein the lengths are along a direction, L′
- , and wherein said embossments cover no more than about fifty percent of the area of said absorbent sheet, and wherein further the embossments are spaced apart from each other at a distance, D, with the proviso that at least one of the ratios of W;
S and D;
S is from about 1 to about 4. - View Dependent Claims (33, 34, 35, 36, 37, 38)
- , and wherein said embossments cover no more than about fifty percent of the area of said absorbent sheet, and wherein further the embossments are spaced apart from each other at a distance, D, with the proviso that at least one of the ratios of W;
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39. A method of making a multi-ply absorbent sheet comprising:
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preparing a plurality of absorbent plies, and bonding said plies, wherein said sheet includes a plurality of primary undulations extending along a principal undulatory axis of the sheet, said undulations being spaced apart a distance, S; and providing an emboss pattern to said sheet, wherein said emboss pattern comprises a plurality of design elements wherein up to about 50 percent of said surface area is embossed, characterized in that said design elements have a characteristic design element width, W, and a characteristic emboss length, L, along a direction, L′
, and wherein the ratio of W;
S for each design element is from about 1 to about 4.- View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A method of providing an absorbent ply in a multi-ply absorbent product comprising:
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preparing a web comprising cellulosic furnish;
applying said web to a Yankee dryer;
creping said web from said Yankee dryer with an undulatory creping blade at a consistency of between about 40 and about 98 percent, such that said creped ply is provided with crepe bars extending laterally in the cross-direction and undulations extending longitudinally in the machine direction, said undulations being spaced apart a distance, S;
embossing said ply with an emboss pattern comprising a plurality of design elements wherein up to about 50 percent of the area of said absorbent ply is embossed, characterized in that each design element of said emboss pattern has a characteristic emboss element lateral width, W, and wherein the ratio of W;
S for each design element is from about 1 to about 4; and
incorporating said ply into said multi-ply absorbent product. - View Dependent Claims (55, 56, 57, 58, 59, 60)
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Specification
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- Resources
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Current AssigneeGPCP IP Holdings LLC
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Original AssigneeFort James Corporation (KOCH Industries Incorporated)
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InventorsGracyalny, Dale T., Kershaw, Thomas N.
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Primary Examiner(s)Chin, Peter
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Application NumberUS09/709,139Time in Patent Office467 DaysField of Search162/109, 162/111, 162/112, 162/113, 162/117, 162/123, 162/132US Class Current162/112CPC Class CodesB31F 1/07 Embossing , i.e. producing ...B31F 1/122 the paper being submitted t...B31F 1/145 Blade constructionsB31F 2201/072 Laser engravingB31F 2201/0733 PatternB31F 2201/0738 Cross sectional profile of ...B31F 2201/0756 Characteristics of the inco...B31F 2201/0758 Characteristics of the embo...B31F 2201/0761 Multi-layered
