CA2246526A1 - Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue - Google Patents
Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue Download PDFInfo
- Publication number
- CA2246526A1 CA2246526A1 CA 2246526 CA2246526A CA2246526A1 CA 2246526 A1 CA2246526 A1 CA 2246526A1 CA 2246526 CA2246526 CA 2246526 CA 2246526 A CA2246526 A CA 2246526A CA 2246526 A1 CA2246526 A1 CA 2246526A1
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- Canada
- Prior art keywords
- debossments
- corners
- polygonal cells
- sheet
- cells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/16—Paper towels; Toilet paper; Holders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0707—Embossing by tools working continuously
- B31F2201/0715—The tools being rollers
- B31F2201/0723—Characteristics of the rollers
- B31F2201/0733—Pattern
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Paper (AREA)
Abstract
In one aspect, the invention includes a sheet of tissue paper comprising: a) a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and b) a plurality of second debossments proximate corners of the polygonal cells, the second debossments being larger than the first debossments. In another aspect, the invention includes a sheet of tissue paper comprising: b) a plurality of prominent patterns, the prominent patterns defining corners of square cells and comprising second debossments, the square cells having a center and having diagonals extending between the corners; and b) a stitchlike pattern of first debossments extending substantially only along the diagonals of the square cells. In yet another aspect, the invention includes a roll of embossed tissue defining a machine direction and comprising: a) two series of intersecting lines of first debossments, one series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed counterclockwise the machine direction, the two series of lines together substantially defining a plurality of polygonal cells, the polygonal cells having corners and b) a plurality of prominent patterns at at least some corners of the polygonal cells.
Description
CA 02246526 1998-09-03 . . .. ~ .~, _ _ _ . :~. , ,~ :, I II TISSUE PAPER SHEETS, ROLLS OF EMBOSSED TISSUE, AND
METHODS OF FORMING ROLLS OF EMBOSSED TISSUE
METHODS OF FORMING ROLLS OF EMBOSSED TISSUE
TECHNICAL FIELD
a This invention pertains to tissue paper sheets, rolls of embossed s ~~ tissue, and methods of forming tissue paper sheets and rolls of 6 II embossed tissue.
s $ACKGROUND OF THE I1~V)~NT~ON
Tissue produced using traditional wet press technology is typically to embossed subsequent to creping to improve bulk, appearance and perceived softness. It is known in the art to emboss sheets comprising Iz multiple plies of creped tissue to increase the surface area of the sheets 13 and thereby enhance their bulk and water-holding capacity.
Tissue paper can be sold in many forms, but toilet tissue is Is typically marketed in rolls. A goal in marketing rolls of toilet tissue is 16 to enhance a consumer perception regarding the quality and comfort of ,~ a toilet tissue. Consumers generally associate soft toilet tissues as being Is high-quality tissues that will be comfortable to use. Accordingly, it is ,9 a goal in the toilet tissue industry to create embossed tissue designs that zo enhance consumer perception of softness of a toilet tissue product z, ~~ comprising the designs.
2z ~~ A prior art method for enhancing perception of softness of a 23 tissue product is to create relatively shallow stitchlike debossments za arranged in patterns to form polygonal cells across a surface of a toilet POa-036. P01 OS07131dN 1 .. . .". , .... . .... , ~, , ". . "". " , , a " ". . , . ~" .. , .. . , , , ~. ."" .. ~"., .... -,. ", " "" , ,", . . w ... , , . . . "
tissue. The polygonal cells have a "pillowy" quilted appearance creating z the illusion of shading as would be seen in a quilt having chambers ~~ being filled with fiber or down.
A prior art method for enhancing a consumer perception of s quality of a tissue product is a so-called "signature" pattern. The signature pattern can also be a distinctive pattern to enable consumer recognition of a tissue product. A signature pattern is a predominant s pattern of debossments, commonly suggesting a shape of a flower, shell, bird or animal which is repeated regularly across a surface of a toilet ~~ tissue. It is common to combine signature patterns with stitchlike debossments. The stitchlike debossments form the pillowy quilted Iz chambers described above, and the signature debossments are formed in Is the center of such pillowy chambers. The signature patterns are formed la over the centers of pillowy chambers to create a consumer perception Is of fabric wherein the stitches surround an imprinted portion.
le ~~ In the course of the present invention, it has been discovered that " ~~ the signature patterns formed in the center of quilted chambers can Is decrease the pillowy appearance of the chambers, and accordingly ,9 undermine the effect of stitchlike patterns. Also, it has been discovered zo that the signature patterns formed in the center of quilted chambers can z~ affect a bulk and water holding capacity of the chambers. Accordingly, zz it is desired to develop alternative methods of embossing tissue wherein z3 both signature patterns and stitchlike patterns are provided on the same 2a ~, tissue, and wherein the signature patterns do not adversely affect either P04-036. P01 0507191d1Y
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the pillowy illusion created by the stitchlike debossments, or the bulk z and water holding capacity of chambers created by the stitchlike debossments.
s BRIEF D ESC~;tIPTIQN OF TIE DRAWINGS
s Preferred described ow with embodiments bel of the invention are reference to the following accompanying drawings.
s Fig. 1 is a fragmentary top view of a sheet of present tissue the 9 invention illustrating a preferred relationshipvarious of debossments o formed on relationshipof the the tissue sheet, and a preferred a debossments formed.
to a machine direction at which the tissue sheet is n Fig. 2 is an expanded view of a first of the Fig.1 sheet.
portion ,3Fig. 3 is an expanded view of a second Fig.
portion of the 1 ~4 II sheet.
Is Fig. 4 is a graph illustrating consumer perceived softness of a s product encompassed by the present invention (referred to as "Happy m Flower") relative to other toilet tissue products.
~s Fig. 5 is a graph illustrating consumer purchase intent of a ,9 product encompassed by the present invention (referred to as "Happy zo Flower") relative to other toilet tissue products.
z~
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]DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
z This disclosure of the invention is submitted in furtherance of the constitutional purposes of the U.S. Patent Laws "to promote the progress a of science and useful arts" (Article 1, Section 8).
s ~~ In one aspect, the invention comprises a sheet of tissue paper comprising:
a plurality of first debossments substantially defining polygonal a cells, the polygonal cells having corners; and s a plurality of second debossments proximate corners of the o polygonal cells, the second debossments being larger than the first ,~ debossments.
>z ~~ In another aspect, the invention comprises a roll of embossed ,3 tissue defining a machine direction and comprising:
two series of intersecting lines of first debossments, one series of ,s ~~ the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed counterclockwise the machine direction, the two series of lines together substantially defining Is a plurality of polygonal cells, the polygonal cells having corners; and ,9 a plurality of prominent patterns at at least some corners of the zo polygonal cells.
z, In yet another aspect, the invention comprises a method of zz forming a roll of embossed tissue comprising:
23 transferring tissue paper through an embosser, the tissue paper zo being transferred along a machine direction, the embosser embossing two P04-036.P01 0507131dN 4 PAT USIAM-00 . . ... " "~" ... " . .... ""~ " ,. ,. . " ... ,~,. . ,, m . ~ . . , , . ,~ .
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series of intersecting lines of first debossments into the tissue paper, one z series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed at a second a ~~ acute angle counterclockwise the machine direction, the two series of s ~~ lines together defining a plurality of polygonal cells, the polygonal cells having corners; and the embosser embossing a plurality of second debossments s proximate at least some corners of the polygonal cells to form prominent patterns at the at least some of the corners.
A tissue paper sheet 10 comprising a preferred embossment design a of the present invention is described with reference to Figs. 1-3.
~z Referring to Fig. 1, the embossment design comprises a plurality of first m debossments 12 (only a few of which are labeled in Fig. 1) which define polygonal cells 14 (only a few of which are labeled in Fig. 1). First ~s debossments 12 are stitchlike debossments in that they form a stitched type pattern on tissue sheet 10, and are all substantially uniform in size and shape. The stitched pattern of first debossments 12 creates pillowy regions within polygonal cells 14 which have the appearance of stuffed pockets, as would be found on a quilted blanket.
zo The embossment design also encompasses a plurality of prominent z~ patterns 16 (only a few of which are labeled in Fig. 1), which in the zz shown preferred design suggest floral patterns. For purpose of z3 interpreting this disclosure and the claims that follow, a prominent zo pattern is defined as a most immediately discernable pattern on a tissue P04-036. P01 0507I31d N S PAT-U51 AM-00 .... , a," , ", ~ ,...a,r "..a~ ., " . . _ ... ,.. .. " a.,.:; , n ..,. , .~w ,~~na~. «: .a. ,~... ~a ,. .a, , "; , .,.,.: , . . " .. "
sheet. A pattern may be rendered prominent either by having a size z which is larger than any other pattern on a tissue sheet, or by having 3 an appearance which is more distinctive than other patterns on a tissue a sheet. For instance, in the shown preferred embodiment, the prominent s pattern 16 is more distinctive than other patterns on the tissue sheet a due to its strong suggestion of a floral design and due to its large size.
Prominent pattern 16 is composed of a plurality of second s debossments 18, 19, 20 and 21 (only a few of which are labeled in Fig.
1) which are arranged to define prominent pattern 16.
,o A distinction between the present invention embossment design of n Fig. 1 and priar art embossment designs is that the Fig. 1 design has ,z prominent patterns 16 formed at corners of polygonal cells 14, and prior 13 art designs would have the prominent patterns formed at centers of such ,4 cells. For purposes of interpreting this specification and the claims that ,s follow, a prominent pattern 16 comprises the debossments 18, 19, 20, ,6 and 21 that define the pattern, as well as spaces between the debossments within an individual pattern. Thus, a prominent pattern 16 ,s can be at (or overlapping) a corner even if none of the individual ,9 debossrnents 18, 19, 20 or 21 actually overlaps the corner.
zo The present invention formation of prominent patterns 16 at z, corners of cells 14 enables a more pillowy appearance to be obtained zz by cells 14 than is obtainable by prior art constructions. Such more z3 pillowy appearance enhances consumer perception of softness relative to za prior art embossment designs. Also, the structure of an embossment P04-036.P01 0507131dN 6 PAT USIAM-00 .ypa:.~n~li :.. , :M n ,.p .. .. n . p n Y,...n::..: ~ gym: n n :p: n. p ....., . y.:
design of the present invention can enable a tissue sheet comprising 2 such design to have reasonable bulk and water holding capacity.
It is noted that some prior art tissue sheets have stitchlike a debossments without prominent patterns. Such tissue sheets also have s good bulk and water holding capacity. However, such tissue sheets are s generally not readily distinguishable by consumers due to their lack of a distinctive prominent pattern. Accordingly, the present invention is s advantageous over prior art embossment designs that lack prominent patterns. The present invention enables a prominent pattern to be placed distinctively on a tissue sheet, and yet also enables the tissue n sheet to maintain good bulk and water holding capacity.
~z In the shown embossment design, polygonal cells 14 are substantially rectangular, or diamond shaped. Accordingly, polygonal n cells 14 comprise four separate corners. Prominent patterns 16 are ~~ formed at only two of the four corners. The other two corners of polygonal cells 14 are surrounded by third debossments 26. Third debossments 26 are larger than first debossments 12, and smaller than ~s second debossments 18, 19, 20 and 21. Third debossments 26 are located proximate corners of polygonal cells 14 and are arranged such 2o that four third debossments 26 are centered around individual corners 2, to which third debossments 26 are proximate. A fourth debossment 28 z2 is formed at the corner to which third debossments 26 are proximate.
23 II Fourth debossment 28 is smaller than first debossments 12.
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Preferably, all of debossments 12, 18, 19, 20, 21, 26 and 28 are z formed to a depth of less than or equal to about 0.060 inches in 3 ~~ sheet 10 using an engraved roll engraved to a depth of about 0.060 a II inches.
sSheet 10 is transferred throughan embosser alonga machine sdirection "Z" to form the shown embossment e embosser design. Th embosses two series of intersecting of first debossments12 into lines the stissue paper. One series of the linesdisposed at a acute angle is first "Y" clockwise of machine direction and the other of lines "Z" series is disposed at a second acute angle "X" counterclockwise of machine n ~~ direction "Z". The two series of lines together define a plurality of ~z polygonal cells 14. The embosser also embosses second debossments 18, s 19, 20, and 21, as well as third debossments 26 and fourth ,a debossments 28.
,s ~~ In the shown preferred embodiment, stitchlike debossments 12 are formed to create wavy lines rather than straight lines. Accordingly, ,~ polygonal cells 14 are not true diamonds, but are instead wavy diamonds. Stitchlike debossments 12 serpentine about generator lines 30 ,9 ~~ which extend from corner to corner of the polygonal cells.
zo Some example dimensions of the embossment design of Fig. 1 are z~ as follows. A distance "A" from one prominent pattern to another zz ~~ prominent pattern along machine axis "Z" is from about 3.8 to z3 ~~ about 3.9 inches. An angle "B" of machine axis "Z" relative to an axis zo ~~ across a diagonal of a polygonal cell is from about 63° to about 64°.
P04-036.P01 0507I31dN 8 PAT USIAM-00 Angle "X" of machine axis "Z" to a first series of lines defined by z stitchlike debossments 12 is from about 18° to about 19°.
Angle "Y"
s of machine axis "Z" to the second series of lines defined by stitchlike 4 debossments 12 is from about 71° to about 72°. An angle "D" of s ~~ machine axis "Z" relative to a clockwise diagonal through a polygonal 6 II cell is from about 26° to about 27°
An expanded view of a polygonal cell 14 is shown in Fig. 2 to s illustrate that polygonal cell 14 comprises a large expanse between 9 prominent patterns 16. Such large expanse permits an enhanced pillowy to effect of stitchlike debossments 12 relative to the effect that would " occur if a prominent pattern were placed in a center of polygonal Iz cell 14. Accordingly, prominent portions 16 are preferably not placed ,3 in a center of polygonal cells 14 in accordance with the present ~4 II invention.
,s In the above discussion, the Fig. 1 design is described as a series I6 of cells 14 defined by stitchlike debossments 12. An alternative way of describing the Fig. 1 design is as a series of squares defined by ~s prominent patterns 16. Referring to Fig. 3, prominent patterns 16 define corners of a square cell 40 (the edges of which are shown as zo imaginary dashed lines). Square cell 40 comprises a center 42, and z~ diagonal axes 44 and 46 extending through center 42 and to corners of zz square cell 40. Axes 44 and 46 exactly overlay generator lines 30 z3 (shown in Fig. 1). Stitchlike debossments 12 extend substantially only P04-036. P01 0507131 dN 9 P~iT-USIAM-00 .,.,..",~, ~ , ", , " "~ . , ." ., ~,. .w . ~" .. . .,. ...
along diagonal axes 44 and 46, rather than being disbursed uniformly z throughout square cell 40.
A minor pattern comprising third debossments 26 is formed 4 proximate center 42 of square 40, and a fourth debossment 28 is formed s to overlay center 42. Third debossments 26 form corners of an internal square SO (the edges of which are shown in imaginary dashed lines) centered at center 42 of square 40.
s The enhanced perception of softness of tissue products of the present invention relative to prior art tissue products is borne out in o consumer tests. Specifically, product evaluations were conducted n among 103 female respondents. Prospective participants were called at ~z home and told that a marketing research study was being done on 13 paper products. Each was then screened to ensure that she met the ~4 following requirements:
~s 1) Neither she nor anyone in their household works in market s research, advertising or public relations, media (radio, print, TV), a paper products company, or the supermarket or grocery business;
,d 2) She has not participated in a focus group, research panel, or market research discussion in the last three months;
zo3) She is female head of a household;
the 214) She is primary grocery shopper for her household;
the 225) She is primary person in the household who buys the za II bathroom tissue;
P04-036.P01 0507J31dN 10 ., . ," .. ", " ." " ... . " . ", , , " ,.. "" ... ." . ..
6) She has bought one of the following brands of bath tissue z for herself and her family - Charmin (Ultra), Northern (Ultra), Kleenex/Cottonelle (Ultra), Safeway Select Softly (Ultra), Lucky Simply a Soft (Ultra), or Albertson's Soft Choice (Ultra); and s 7) She buys bath tissue at Albertson's, Lucky, or Safeway.
Qualified respondents were then invited to a research facility to evaluate bathroom tissue products.
s At the start of each session, pre-recruited participants were given a short introduction and told that they would be asked questions about bathroom tissue. Specifically, they were told that they would be looking m at several bathroom tissues, they would be asked to perform tasks with Iz each tissue to judge the tissue's performance, and they should complete the tasks as if they were in their own homes.
la The results of the evaluation are graphically illustrated in Figs. 4 ~s and S. The numbers in brackets indicate mean ratings, and brands having the same letter labels are not significantly different from one m another. Brands identified by "PL" are Potlatch products have the same base paper construction, on the paper.
but differing in a pattern formed ,9 Fig. 4 illustratesthat a product of the present invention(identified as zo "Happy Flower") has a perceived softness better comparable than or to zl all of the tested very premium bathroom tissue products except the zz Charmin Triple Roll. Thus, Fig. 4 illustrates that a pattern z3 encompassed by the present invention can create a consumer perception z4 of softness of tissue product.
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Fig. 5 illustrates consumer purchase intent of the evaluated toilet z tissues. The numbers associated with each tissue indicate a mean rating, a and data for tissues having the same letter labels is not significantly 4 different. Fig. 5 illustrates that a tissue product encompassed by the s present invention (the product labeled "Happy Flower") had a higher purchase intent that any other tissue product, and scored results comparable or better than the very premium product referred to as s "Charmin Premium". Accordingly, a tissue encompassed by the present 9 invention can have enhanced consumer perception, evidenced by an enhanced intent to purchase the product, relative to other tissue " ~~ products.
~z Significantly, both Figs. 4 and 5 evidence that the product having the design "Happy Flower" encompassed by the present invention was ~4 perceived to be at least as good as, and frequently significantly better ~s than other tissue products comprising an identical paper but having a ,6 different pattern (the products identified as PL Combo Roll, PL Double Pass, and PL Screen Emboss). Thus, a pattern encompassed by the ~s present invention can have an improved consumer perception of tissue quality relative to other tissue patterns.
zo ~~ Although the invention has been described in application to toilet z~ tissue sheets and rolls, it is to be understood that an embossment z2 pattern of the present invention can also have utility and application to z3 other non-woven articles, such as, for example, paper towels and P04-036.P01 05071318N 12 PAT-USIAM-00 . ... . ," ,~ " ", . " ~" ~. "~ .. ,.. ....,.
1 napkins. Also, an embossment pattern of the present invention can z have application to woven articles.
3 In compliance with the statute, the invention has been described 4 in language more or less specific as to structural and methodical s features. It is to be understood, however, that the invention is not s limited to the specific features shown and described, since the means 7 herein disclosed comprise preferred forms of putting the invention into s effect. The invention is, therefore, claimed in any of its forms or 9 modifications within the proper scope of the appended claims to appropriately interpreted in accordance with the doctrine of equivalents.
1z POJ-036.P01 0507131dN 13 PAT USIAM-00 ... .. . ... ~ .".,. , ", ~ " . R , . ". ~ , ~ ., a , , , " ",
a This invention pertains to tissue paper sheets, rolls of embossed s ~~ tissue, and methods of forming tissue paper sheets and rolls of 6 II embossed tissue.
s $ACKGROUND OF THE I1~V)~NT~ON
Tissue produced using traditional wet press technology is typically to embossed subsequent to creping to improve bulk, appearance and perceived softness. It is known in the art to emboss sheets comprising Iz multiple plies of creped tissue to increase the surface area of the sheets 13 and thereby enhance their bulk and water-holding capacity.
Tissue paper can be sold in many forms, but toilet tissue is Is typically marketed in rolls. A goal in marketing rolls of toilet tissue is 16 to enhance a consumer perception regarding the quality and comfort of ,~ a toilet tissue. Consumers generally associate soft toilet tissues as being Is high-quality tissues that will be comfortable to use. Accordingly, it is ,9 a goal in the toilet tissue industry to create embossed tissue designs that zo enhance consumer perception of softness of a toilet tissue product z, ~~ comprising the designs.
2z ~~ A prior art method for enhancing perception of softness of a 23 tissue product is to create relatively shallow stitchlike debossments za arranged in patterns to form polygonal cells across a surface of a toilet POa-036. P01 OS07131dN 1 .. . .". , .... . .... , ~, , ". . "". " , , a " ". . , . ~" .. , .. . , , , ~. ."" .. ~"., .... -,. ", " "" , ,", . . w ... , , . . . "
tissue. The polygonal cells have a "pillowy" quilted appearance creating z the illusion of shading as would be seen in a quilt having chambers ~~ being filled with fiber or down.
A prior art method for enhancing a consumer perception of s quality of a tissue product is a so-called "signature" pattern. The signature pattern can also be a distinctive pattern to enable consumer recognition of a tissue product. A signature pattern is a predominant s pattern of debossments, commonly suggesting a shape of a flower, shell, bird or animal which is repeated regularly across a surface of a toilet ~~ tissue. It is common to combine signature patterns with stitchlike debossments. The stitchlike debossments form the pillowy quilted Iz chambers described above, and the signature debossments are formed in Is the center of such pillowy chambers. The signature patterns are formed la over the centers of pillowy chambers to create a consumer perception Is of fabric wherein the stitches surround an imprinted portion.
le ~~ In the course of the present invention, it has been discovered that " ~~ the signature patterns formed in the center of quilted chambers can Is decrease the pillowy appearance of the chambers, and accordingly ,9 undermine the effect of stitchlike patterns. Also, it has been discovered zo that the signature patterns formed in the center of quilted chambers can z~ affect a bulk and water holding capacity of the chambers. Accordingly, zz it is desired to develop alternative methods of embossing tissue wherein z3 both signature patterns and stitchlike patterns are provided on the same 2a ~, tissue, and wherein the signature patterns do not adversely affect either P04-036. P01 0507191d1Y
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the pillowy illusion created by the stitchlike debossments, or the bulk z and water holding capacity of chambers created by the stitchlike debossments.
s BRIEF D ESC~;tIPTIQN OF TIE DRAWINGS
s Preferred described ow with embodiments bel of the invention are reference to the following accompanying drawings.
s Fig. 1 is a fragmentary top view of a sheet of present tissue the 9 invention illustrating a preferred relationshipvarious of debossments o formed on relationshipof the the tissue sheet, and a preferred a debossments formed.
to a machine direction at which the tissue sheet is n Fig. 2 is an expanded view of a first of the Fig.1 sheet.
portion ,3Fig. 3 is an expanded view of a second Fig.
portion of the 1 ~4 II sheet.
Is Fig. 4 is a graph illustrating consumer perceived softness of a s product encompassed by the present invention (referred to as "Happy m Flower") relative to other toilet tissue products.
~s Fig. 5 is a graph illustrating consumer purchase intent of a ,9 product encompassed by the present invention (referred to as "Happy zo Flower") relative to other toilet tissue products.
z~
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]DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
z This disclosure of the invention is submitted in furtherance of the constitutional purposes of the U.S. Patent Laws "to promote the progress a of science and useful arts" (Article 1, Section 8).
s ~~ In one aspect, the invention comprises a sheet of tissue paper comprising:
a plurality of first debossments substantially defining polygonal a cells, the polygonal cells having corners; and s a plurality of second debossments proximate corners of the o polygonal cells, the second debossments being larger than the first ,~ debossments.
>z ~~ In another aspect, the invention comprises a roll of embossed ,3 tissue defining a machine direction and comprising:
two series of intersecting lines of first debossments, one series of ,s ~~ the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed counterclockwise the machine direction, the two series of lines together substantially defining Is a plurality of polygonal cells, the polygonal cells having corners; and ,9 a plurality of prominent patterns at at least some corners of the zo polygonal cells.
z, In yet another aspect, the invention comprises a method of zz forming a roll of embossed tissue comprising:
23 transferring tissue paper through an embosser, the tissue paper zo being transferred along a machine direction, the embosser embossing two P04-036.P01 0507131dN 4 PAT USIAM-00 . . ... " "~" ... " . .... ""~ " ,. ,. . " ... ,~,. . ,, m . ~ . . , , . ,~ .
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series of intersecting lines of first debossments into the tissue paper, one z series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed at a second a ~~ acute angle counterclockwise the machine direction, the two series of s ~~ lines together defining a plurality of polygonal cells, the polygonal cells having corners; and the embosser embossing a plurality of second debossments s proximate at least some corners of the polygonal cells to form prominent patterns at the at least some of the corners.
A tissue paper sheet 10 comprising a preferred embossment design a of the present invention is described with reference to Figs. 1-3.
~z Referring to Fig. 1, the embossment design comprises a plurality of first m debossments 12 (only a few of which are labeled in Fig. 1) which define polygonal cells 14 (only a few of which are labeled in Fig. 1). First ~s debossments 12 are stitchlike debossments in that they form a stitched type pattern on tissue sheet 10, and are all substantially uniform in size and shape. The stitched pattern of first debossments 12 creates pillowy regions within polygonal cells 14 which have the appearance of stuffed pockets, as would be found on a quilted blanket.
zo The embossment design also encompasses a plurality of prominent z~ patterns 16 (only a few of which are labeled in Fig. 1), which in the zz shown preferred design suggest floral patterns. For purpose of z3 interpreting this disclosure and the claims that follow, a prominent zo pattern is defined as a most immediately discernable pattern on a tissue P04-036. P01 0507I31d N S PAT-U51 AM-00 .... , a," , ", ~ ,...a,r "..a~ ., " . . _ ... ,.. .. " a.,.:; , n ..,. , .~w ,~~na~. «: .a. ,~... ~a ,. .a, , "; , .,.,.: , . . " .. "
sheet. A pattern may be rendered prominent either by having a size z which is larger than any other pattern on a tissue sheet, or by having 3 an appearance which is more distinctive than other patterns on a tissue a sheet. For instance, in the shown preferred embodiment, the prominent s pattern 16 is more distinctive than other patterns on the tissue sheet a due to its strong suggestion of a floral design and due to its large size.
Prominent pattern 16 is composed of a plurality of second s debossments 18, 19, 20 and 21 (only a few of which are labeled in Fig.
1) which are arranged to define prominent pattern 16.
,o A distinction between the present invention embossment design of n Fig. 1 and priar art embossment designs is that the Fig. 1 design has ,z prominent patterns 16 formed at corners of polygonal cells 14, and prior 13 art designs would have the prominent patterns formed at centers of such ,4 cells. For purposes of interpreting this specification and the claims that ,s follow, a prominent pattern 16 comprises the debossments 18, 19, 20, ,6 and 21 that define the pattern, as well as spaces between the debossments within an individual pattern. Thus, a prominent pattern 16 ,s can be at (or overlapping) a corner even if none of the individual ,9 debossrnents 18, 19, 20 or 21 actually overlaps the corner.
zo The present invention formation of prominent patterns 16 at z, corners of cells 14 enables a more pillowy appearance to be obtained zz by cells 14 than is obtainable by prior art constructions. Such more z3 pillowy appearance enhances consumer perception of softness relative to za prior art embossment designs. Also, the structure of an embossment P04-036.P01 0507131dN 6 PAT USIAM-00 .ypa:.~n~li :.. , :M n ,.p .. .. n . p n Y,...n::..: ~ gym: n n :p: n. p ....., . y.:
design of the present invention can enable a tissue sheet comprising 2 such design to have reasonable bulk and water holding capacity.
It is noted that some prior art tissue sheets have stitchlike a debossments without prominent patterns. Such tissue sheets also have s good bulk and water holding capacity. However, such tissue sheets are s generally not readily distinguishable by consumers due to their lack of a distinctive prominent pattern. Accordingly, the present invention is s advantageous over prior art embossment designs that lack prominent patterns. The present invention enables a prominent pattern to be placed distinctively on a tissue sheet, and yet also enables the tissue n sheet to maintain good bulk and water holding capacity.
~z In the shown embossment design, polygonal cells 14 are substantially rectangular, or diamond shaped. Accordingly, polygonal n cells 14 comprise four separate corners. Prominent patterns 16 are ~~ formed at only two of the four corners. The other two corners of polygonal cells 14 are surrounded by third debossments 26. Third debossments 26 are larger than first debossments 12, and smaller than ~s second debossments 18, 19, 20 and 21. Third debossments 26 are located proximate corners of polygonal cells 14 and are arranged such 2o that four third debossments 26 are centered around individual corners 2, to which third debossments 26 are proximate. A fourth debossment 28 z2 is formed at the corner to which third debossments 26 are proximate.
23 II Fourth debossment 28 is smaller than first debossments 12.
PO~!-036.P01 0507131dN 7 PAT USIAM-00 ~" .. .,. ". ",...,"~ ~ ", ~ . , m",. .. ," ,,. , ~ w ,.~ ~" .., ,"". , ",", "~ ~ " , , , ,. , ,.
Preferably, all of debossments 12, 18, 19, 20, 21, 26 and 28 are z formed to a depth of less than or equal to about 0.060 inches in 3 ~~ sheet 10 using an engraved roll engraved to a depth of about 0.060 a II inches.
sSheet 10 is transferred throughan embosser alonga machine sdirection "Z" to form the shown embossment e embosser design. Th embosses two series of intersecting of first debossments12 into lines the stissue paper. One series of the linesdisposed at a acute angle is first "Y" clockwise of machine direction and the other of lines "Z" series is disposed at a second acute angle "X" counterclockwise of machine n ~~ direction "Z". The two series of lines together define a plurality of ~z polygonal cells 14. The embosser also embosses second debossments 18, s 19, 20, and 21, as well as third debossments 26 and fourth ,a debossments 28.
,s ~~ In the shown preferred embodiment, stitchlike debossments 12 are formed to create wavy lines rather than straight lines. Accordingly, ,~ polygonal cells 14 are not true diamonds, but are instead wavy diamonds. Stitchlike debossments 12 serpentine about generator lines 30 ,9 ~~ which extend from corner to corner of the polygonal cells.
zo Some example dimensions of the embossment design of Fig. 1 are z~ as follows. A distance "A" from one prominent pattern to another zz ~~ prominent pattern along machine axis "Z" is from about 3.8 to z3 ~~ about 3.9 inches. An angle "B" of machine axis "Z" relative to an axis zo ~~ across a diagonal of a polygonal cell is from about 63° to about 64°.
P04-036.P01 0507I31dN 8 PAT USIAM-00 Angle "X" of machine axis "Z" to a first series of lines defined by z stitchlike debossments 12 is from about 18° to about 19°.
Angle "Y"
s of machine axis "Z" to the second series of lines defined by stitchlike 4 debossments 12 is from about 71° to about 72°. An angle "D" of s ~~ machine axis "Z" relative to a clockwise diagonal through a polygonal 6 II cell is from about 26° to about 27°
An expanded view of a polygonal cell 14 is shown in Fig. 2 to s illustrate that polygonal cell 14 comprises a large expanse between 9 prominent patterns 16. Such large expanse permits an enhanced pillowy to effect of stitchlike debossments 12 relative to the effect that would " occur if a prominent pattern were placed in a center of polygonal Iz cell 14. Accordingly, prominent portions 16 are preferably not placed ,3 in a center of polygonal cells 14 in accordance with the present ~4 II invention.
,s In the above discussion, the Fig. 1 design is described as a series I6 of cells 14 defined by stitchlike debossments 12. An alternative way of describing the Fig. 1 design is as a series of squares defined by ~s prominent patterns 16. Referring to Fig. 3, prominent patterns 16 define corners of a square cell 40 (the edges of which are shown as zo imaginary dashed lines). Square cell 40 comprises a center 42, and z~ diagonal axes 44 and 46 extending through center 42 and to corners of zz square cell 40. Axes 44 and 46 exactly overlay generator lines 30 z3 (shown in Fig. 1). Stitchlike debossments 12 extend substantially only P04-036. P01 0507131 dN 9 P~iT-USIAM-00 .,.,..",~, ~ , ", , " "~ . , ." ., ~,. .w . ~" .. . .,. ...
along diagonal axes 44 and 46, rather than being disbursed uniformly z throughout square cell 40.
A minor pattern comprising third debossments 26 is formed 4 proximate center 42 of square 40, and a fourth debossment 28 is formed s to overlay center 42. Third debossments 26 form corners of an internal square SO (the edges of which are shown in imaginary dashed lines) centered at center 42 of square 40.
s The enhanced perception of softness of tissue products of the present invention relative to prior art tissue products is borne out in o consumer tests. Specifically, product evaluations were conducted n among 103 female respondents. Prospective participants were called at ~z home and told that a marketing research study was being done on 13 paper products. Each was then screened to ensure that she met the ~4 following requirements:
~s 1) Neither she nor anyone in their household works in market s research, advertising or public relations, media (radio, print, TV), a paper products company, or the supermarket or grocery business;
,d 2) She has not participated in a focus group, research panel, or market research discussion in the last three months;
zo3) She is female head of a household;
the 214) She is primary grocery shopper for her household;
the 225) She is primary person in the household who buys the za II bathroom tissue;
P04-036.P01 0507J31dN 10 ., . ," .. ", " ." " ... . " . ", , , " ,.. "" ... ." . ..
6) She has bought one of the following brands of bath tissue z for herself and her family - Charmin (Ultra), Northern (Ultra), Kleenex/Cottonelle (Ultra), Safeway Select Softly (Ultra), Lucky Simply a Soft (Ultra), or Albertson's Soft Choice (Ultra); and s 7) She buys bath tissue at Albertson's, Lucky, or Safeway.
Qualified respondents were then invited to a research facility to evaluate bathroom tissue products.
s At the start of each session, pre-recruited participants were given a short introduction and told that they would be asked questions about bathroom tissue. Specifically, they were told that they would be looking m at several bathroom tissues, they would be asked to perform tasks with Iz each tissue to judge the tissue's performance, and they should complete the tasks as if they were in their own homes.
la The results of the evaluation are graphically illustrated in Figs. 4 ~s and S. The numbers in brackets indicate mean ratings, and brands having the same letter labels are not significantly different from one m another. Brands identified by "PL" are Potlatch products have the same base paper construction, on the paper.
but differing in a pattern formed ,9 Fig. 4 illustratesthat a product of the present invention(identified as zo "Happy Flower") has a perceived softness better comparable than or to zl all of the tested very premium bathroom tissue products except the zz Charmin Triple Roll. Thus, Fig. 4 illustrates that a pattern z3 encompassed by the present invention can create a consumer perception z4 of softness of tissue product.
a POQ-0.36.P01 11 PAT USL1M-00 0507f31dN m , ., .. , ~, . , r, ,.,. ~" , . ~" ..
. "~ " ",", "
Fig. 5 illustrates consumer purchase intent of the evaluated toilet z tissues. The numbers associated with each tissue indicate a mean rating, a and data for tissues having the same letter labels is not significantly 4 different. Fig. 5 illustrates that a tissue product encompassed by the s present invention (the product labeled "Happy Flower") had a higher purchase intent that any other tissue product, and scored results comparable or better than the very premium product referred to as s "Charmin Premium". Accordingly, a tissue encompassed by the present 9 invention can have enhanced consumer perception, evidenced by an enhanced intent to purchase the product, relative to other tissue " ~~ products.
~z Significantly, both Figs. 4 and 5 evidence that the product having the design "Happy Flower" encompassed by the present invention was ~4 perceived to be at least as good as, and frequently significantly better ~s than other tissue products comprising an identical paper but having a ,6 different pattern (the products identified as PL Combo Roll, PL Double Pass, and PL Screen Emboss). Thus, a pattern encompassed by the ~s present invention can have an improved consumer perception of tissue quality relative to other tissue patterns.
zo ~~ Although the invention has been described in application to toilet z~ tissue sheets and rolls, it is to be understood that an embossment z2 pattern of the present invention can also have utility and application to z3 other non-woven articles, such as, for example, paper towels and P04-036.P01 05071318N 12 PAT-USIAM-00 . ... . ," ,~ " ", . " ~" ~. "~ .. ,.. ....,.
1 napkins. Also, an embossment pattern of the present invention can z have application to woven articles.
3 In compliance with the statute, the invention has been described 4 in language more or less specific as to structural and methodical s features. It is to be understood, however, that the invention is not s limited to the specific features shown and described, since the means 7 herein disclosed comprise preferred forms of putting the invention into s effect. The invention is, therefore, claimed in any of its forms or 9 modifications within the proper scope of the appended claims to appropriately interpreted in accordance with the doctrine of equivalents.
1z POJ-036.P01 0507131dN 13 PAT USIAM-00 ... .. . ... ~ .".,. , ", ~ " . R , . ". ~ , ~ ., a , , , " ",
Claims (34)
1. A paper product comprising:
a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and a plurality of second debossments proximate corners of the polygonal cells, the second debossments being larger than the first debossments, the second debossments defining at least portions of prominent patterns, the prominent patterns overlapping the corners of the polygonal cells.
a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and a plurality of second debossments proximate corners of the polygonal cells, the second debossments being larger than the first debossments, the second debossments defining at least portions of prominent patterns, the prominent patterns overlapping the corners of the polygonal cells.
2. The product of claim 1 wherein individual polygonal cells have four corners and wherein prominent patterns are at only two of the four corners.
3. A sheet of tissue comprising:
a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and a plurality of second debossments proximate corners of the polygonal cells, the second debossments being larger than the first debossments.
a plurality of first debossments substantially defining polygonal cells, the polygonal cells having corners; and a plurality of second debossments proximate corners of the polygonal cells, the second debossments being larger than the first debossments.
4. The sheet of claim 3 wherein the second debossments define at least portions of prominent patterns, the prominent patterns overlapping the corners of the polygonal cells.
5. The sheet of claim 4 wherein individual polygonal cells have four corners and wherein prominent patterns are at only two of the four corners.
6. The sheet of claim 3 wherein the second debossments are arranged to at least define respective discrete prominent patterns comprising a plurality of said second debossments.
7. The sheet of claim 3 wherein the first debossments are all substantially uniform in size.
8. The sheet of claim 3 wherein the first debossments are stitchlike in appearance.
9. The sheet of claim 3 wherein individual polygonal cells are shaped like diamonds with wavy edges.
10. The sheet of claim 3 wherein polygonal cells have centers and wherein no debossments are at the centers of the polygonal cells.
11. The sheet of claim 3 wherein the second debossments define at least portions of prominent patterns, the prominent patterns overlapping the corners of the polygonal cells, wherein individual polygonal cells have four corners, and wherein prominent patterns are at only two of the four corners, the sheet further comprising third debossments which are bigger than the first debossments and smaller than the second debossments and located proximate the other two of the four corners of the individual polygonal cells.
12. The sheet of claim 11 wherein four third debossments are centered around individual corners to which third debossments are proximate.
13. The sheet of claim 11 wherein four third debossments are centered around individual corners to which third debossments are proximate and wherein a fourth debossment is formed at individual corners to which the third debossments are proximate, the fourth debossment being a different size than the first, second and third debossments.
14. The sheet of claim 13 wherein the fourth debossments are smaller than the first debossments.
15. The sheet of claim 13 wherein all of the debossments are formed to substantially a common depth in the sheet.
16. A sheet of tissue paper comprising:
a plurality of prominent patterns, the prominent patterns defining corners of square cells and comprising second debossments, the square cells having a center and having diagonals extending between the corners; and a stitchlike pattern of first debossments extending substantially only along the diagonals of the square cells.
a plurality of prominent patterns, the prominent patterns defining corners of square cells and comprising second debossments, the square cells having a center and having diagonals extending between the corners; and a stitchlike pattern of first debossments extending substantially only along the diagonals of the square cells.
17. The sheet of claim 16 wherein the first debossments are serpentined about axes extending along the diagonals of the square cells.
18. The sheet of claim 16 further comprising no of said prominent patterns in the centers of the squares.
19. The sheet of claim 16 further comprising third debossments larger than the first debossments and proximate the centers of at least some of the squares.
20. The sheet of claim 16 further comprising third debossments larger than the first debossments and proximate the centers of all of the squares.
21. The sheet of claim 16 further comprising a plurality of third debossments larger than the first debossments and proximate the centers of individual squares, the plurality of third debossments being distributed at corners of an internal square centered at the center of the square defined by the prominent patterns.
22. A sheet of tissue paper comprising:
a plurality of first debossments, the first debossments substantially defining polygonal cells, the polygonal cells having corners;
a plurality of prominent patterns at only some corners of the polygonal cells, the prominent patterns being defined by second debossments; and a plurality of third debossments proximate other corners of the polygonal cells, the third debossments being larger than the first debossments and smaller than the second debossments.
a plurality of first debossments, the first debossments substantially defining polygonal cells, the polygonal cells having corners;
a plurality of prominent patterns at only some corners of the polygonal cells, the prominent patterns being defined by second debossments; and a plurality of third debossments proximate other corners of the polygonal cells, the third debossments being larger than the first debossments and smaller than the second debossments.
23. A sheet of tissue paper comprising:
a plurality of substantially uniformly sized first stitchlike debossments, the first debossments substantially defining polygonal cells, the polygonal cells having corners;
a plurality of prominent patterns at only some corners of the polygonal cells, the prominent patterns being defined by at least three spaced and non-equally sized second debossments, the second debossments being larger than the first debossments; and a plurality of square patterns proximate other corners of the polygonal cells, the square patterns being defined by third debossments which are larger than the first debossments and smaller than the second debossments.
a plurality of substantially uniformly sized first stitchlike debossments, the first debossments substantially defining polygonal cells, the polygonal cells having corners;
a plurality of prominent patterns at only some corners of the polygonal cells, the prominent patterns being defined by at least three spaced and non-equally sized second debossments, the second debossments being larger than the first debossments; and a plurality of square patterns proximate other corners of the polygonal cells, the square patterns being defined by third debossments which are larger than the first debossments and smaller than the second debossments.
24. The sheet of claim 23 further comprising a plurality of round fourth debossments, with individual round fourth debossments being at centers of the square patterns, the round fourth debossments being smaller than the first debossments.
25. A roll of embossed tissue defining a machine direction and comprising:
two series of intersecting lines of first debossments, one series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed counterclockwise the machine direction, the two series of lines together substantially defining a plurality of polygonal cells, the polygonal cells having corners; and a plurality of prominent patterns at at least some corners of the polygonal cells.
two series of intersecting lines of first debossments, one series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed counterclockwise the machine direction, the two series of lines together substantially defining a plurality of polygonal cells, the polygonal cells having corners; and a plurality of prominent patterns at at least some corners of the polygonal cells.
26. The roll of claim 25 wherein the intersecting lines are wavy lines, and wherein the polygonal cells are wavy diamonds.
27. The roll of claim 26 wherein the wavy diamonds have centers, and wherein no prominent patterns are at the centers of the wavy diamonds.
28. The roll of claim 25 wherein the prominent patterns are only at some of the corners of the polygonal cells.
29. The roll of claim 25 wherein the prominent patterns are only at some of the corners of the polygonal cells, the roll further comprising a plurality of second debossments proximate other corners of the polygonal cells, the second debossments being larger than the first debossments.
30. A method of forming a roll of embossed tissue comprising:
transferring tissue paper through an embosser, the tissue paper being transferred along a machine direction, the embosser embossing two series of intersecting lines of first debossments into the tissue paper, one series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed at a second acute angle counterclockwise the machine direction, the two series of lines together defining a plurality of polygonal cells, the polygonal cells having corners; and the embosser embossing a plurality of second debossments proximate at least some corners of the polygonal cells to form prominent patterns at the at least some of the corners.
transferring tissue paper through an embosser, the tissue paper being transferred along a machine direction, the embosser embossing two series of intersecting lines of first debossments into the tissue paper, one series of the lines being disposed at a first acute angle clockwise the machine direction, the other series of lines being disposed at a second acute angle counterclockwise the machine direction, the two series of lines together defining a plurality of polygonal cells, the polygonal cells having corners; and the embosser embossing a plurality of second debossments proximate at least some corners of the polygonal cells to form prominent patterns at the at least some of the corners.
31. The method of claim 30 wherein the embosser forms second debossments proximate only some of the corners of the polygonal cells.
32. The method of claim 30 wherein the embosser forms second debossments proximate only some of the corners of the polygonal cells, the embosser also forming a plurality of third debossments proximate other corners of the polygonal cells, the third debossments being larger than the first debossments and smaller than the second debossments.
33. The method of claim 30 wherein the intersecting lines are wavy lines, and wherein the polygonal cells are wavy diamonds.
34. The method of claim 33 wherein the wavy diamonds have centers, and wherein the embosser forms no second debossments at the centers of the wavy diamonds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2246526 CA2246526A1 (en) | 1998-09-03 | 1998-09-03 | Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2246526 CA2246526A1 (en) | 1998-09-03 | 1998-09-03 | Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2246526A1 true CA2246526A1 (en) | 2000-03-03 |
Family
ID=29409843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2246526 Abandoned CA2246526A1 (en) | 1998-09-03 | 1998-09-03 | Tissue paper sheets, rolls of embossed tissue, and methods of forming rolls of embossed tissue |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2246526A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578323A (en) * | 2013-10-30 | 2014-02-12 | 吴歌 | Inner sheet of cross squared standardized form practicing book |
| WO2021092282A1 (en) * | 2019-11-08 | 2021-05-14 | The Procter & Gamble Company | Discrete cells comprising a leg and/or a concavity |
| US12139855B2 (en) | 2020-11-06 | 2024-11-12 | The Procter & Gamble Company | Discrete cells comprising a leg and/or a concavity |
-
1998
- 1998-09-03 CA CA 2246526 patent/CA2246526A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578323A (en) * | 2013-10-30 | 2014-02-12 | 吴歌 | Inner sheet of cross squared standardized form practicing book |
| WO2021092282A1 (en) * | 2019-11-08 | 2021-05-14 | The Procter & Gamble Company | Discrete cells comprising a leg and/or a concavity |
| US11807991B2 (en) | 2019-11-08 | 2023-11-07 | The Procter & Gamble Company | Discrete cells forming distinct pillow regions |
| US11807990B2 (en) | 2019-11-08 | 2023-11-07 | The Procter & Gamble Company | Discrete cell arrangements |
| US12139855B2 (en) | 2020-11-06 | 2024-11-12 | The Procter & Gamble Company | Discrete cells comprising a leg and/or a concavity |
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