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CA1084652A - Disposable diaper - Google Patents

Disposable diaper

Info

Publication number
CA1084652A
CA1084652A CA 208410 CA208410A CA1084652A CA 1084652 A CA1084652 A CA 1084652A CA 208410 CA208410 CA 208410 CA 208410 A CA208410 A CA 208410A CA 1084652 A CA1084652 A CA 1084652A
Authority
CA
Grant status
Grant
Patent type
Prior art keywords
diaper
fold
lateral
flap
line
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.)
Expired
Application number
CA 208410
Other languages
French (fr)
Inventor
Charles H. Schaar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kendall Co
Original Assignee
Kendall Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/494Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49406Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
    • A61F13/49446Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an impermeable sheet or impermeable part of a sheet placed on or under the top sheet
    • A61F13/49453Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an impermeable sheet or impermeable part of a sheet placed on or under the top sheet the edge leakage prevention sheet being combined with the impermeable backing sheet, e.g. integral with the backing sheet
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49001Absorbent articles specially adapted to be worn around the waist, e.g. diapers having preferential bending zones, e.g. fold lines or grooves

Abstract

ABSTRACT OF THE DISCLOSURE
Disclosed is a diaper comprising an absorbent body, diaper end margins defining front and back waistline regions and lateral margins extending between the end margins. Each lateral margin has a predetermined unconstrained length between those end margins. The diaper further comprises limiting means operative to shorten the length of a lateral margin from its unconstrained length.

Description

BACKGROUND OF TrIE Il`~VENTION
This invention relates to diapers. While the features described herein may be successfully employed with diapers in any form, they are particularly suited for incorporation into disposable diapers of the form including an absorbent body and a fluid impervious backing sheet, the diaper being folded into a box pleat configuration.
Typically such diapers have been commercially avail~
able in a form wherein the diapers are folded lengthwise, pre-senting a rectangular configuration as the user takes the diaperfrom the box in which it is sold. The user then unfolds the diaper along this fold through the crotch region, the result be-ing a diaper having a more elongated rectangular configuration, but requiring various further unfolding and "fanning out" of the waistline diaper regions. These subsequent operations, of course, require the simultaneous supporting of the infant.
These operations require varying degrees of manual dexterity and infant cooperation to be completely successful.
In a presently popular commercial prior art diaper, spots of glue are provided in the crotch region of the absorbent pad to maintain the box pleat configuration in the crotch region as the parent fans the waistline regions and applies the diaper to the infant. Such diapers suffer from the same drawbacks dis-cussed immediately above and, as initially unfolded by the par-ent, present a rectangular object for application to the com-plexly curved body portions of the infant.

SUMMARY OF THE INVEWTION
In view of the foregoing, it is a principal object of the present invention to provide an improved diaper which, upon , . . ~ .

.

s~-initial unfolding by the parent, will presen-t a configuration conducive to the simple and effective application of the diaper to an infant.
To achieve these and other objects appearing herein-after, the present invention is directed to an improved diaper ~ ~ -of the type comprising an absorbent body, diaper end margins ~-defining front and back waistline regions, and lateral margins extending between the end margins with each lateral margin hav-ing a predetermined unconstrained length between those end mar-gins. The improvement comprises the foreshortening of a lateral margin from its unconstrained length, whereby, upon the initial unfolding of the diaper as packaged, the diaper assumes a con-figuration which the waistline portions of the diaper are flared or "fanned out" with respect to the crotch region of the diaper. ~ ~-In particular preferred embodiments, the diaper com- -prises a flexible, waterproof back sheet and an overlying absorb-ent pad and has a series of longitudinal folds which form the back sheet and pad into a box pleat configuration including a pair of outwardly directed flaps. ~ach flap is defined by a laterally outermost longitudinal fold and the adjacent diaper lateral edge. Outer portions of each flap are longitudinally foreshortened to a length less than the length of the longitu-dinal fold defining the flap. The foreshortened portion of each flap may comprise a longitudinal self-overlapping or tuck of the flap. Preferably, the diaper is further provided with a lateral fold in substantially its longitudinal midpoint and the self-overlapping of each flap comprises an adherence of a region of the flap on one side of said lateral fold to a region of the flap on the other side of said lateral fold.
The invention further provides a method of manufactur-.
- . .
.
, .. , , ., .. . ., ' , ' . ', , ~V8~6~2 ing such diapers comprising the steps of overlying a flexible waterproof backing sheet with an absorbent pad, longitudinally folding the backing sheet and pad to form a box pleat configura-tion which includes a palr of outwardly directed flaps, deposit- ;~
ing glue on each flap adjacent its longitudinal midpoint, and folding the diaper about a lateral fold line adjacent the depos-ited glue.

BRIEF DESCRIPTION OF THE DRAWING
Other objects, features, and advantages of the inven-tion will appear from the following description of a particular preferred embodiment, taken together with the accompanying draw-ing, in which:
Fig. 1 is a perspective view of a diaper constructed according to the invention as folded for commercial packaging;
Fig. 2 is a perspective view of the diaper of Fig. 1 as unfolded for use by the consumer;
Fig. 3 is a view taken at 3-3 of Fig. 2;
Fig. 4 is a perspective view, similar to Fig. 1, of a commercially available prior art diaper as folded for packaging;
Fig. 5 is a view, similar to Fig. 2, of the diaper of Fig. 4 as initially unfolded by the consumer; and Fig. 6 is a view taken at 6-6 of Fig. 5.

DESCRIPTION OF A PARTICULAR PREFERRED EM~ODIMENT
Referring to Figs. 1-3, there is shown a disposable diaper incorporating features according to the present invention and comprising a fluid impervious backing sheet 10 and an absorb-ent body or pad 12. The backing sheet 10 and the absorbent body 12 are secured as a unit by lines of heat sealing, such as is . . ~ : ,, ,~ :.

;52 known in the art, including such lines adjacent the lateral mar-gins 14, 16 of the diaper. The backing sheet 10 and absorbent body 12 are folded along fold lines 18, 20 to form a box pleat configuration which includes outwardly directed flaps 22, each defined by a lateral margin (14, 16) and the associated later-ally outermost fold line 20. Conven-tional tape units 24 may be provided at one longitudinal end of the diaper. The box pleat configuration is maintained in the crotch portion of the diaper -(i.e., the region adjacent the diaper's longitudinal midpoint defined by reference line A in Figs. 1 and 2) by means of an -;
adhesive which secures adjacent surface portions (as at 26 of ~
Fig. 2) of the pleated absorbent body 12. ~ -After the diaper has been completed to the degree thus far described, each flap 22 is foreshortened, preferably at the lateral margins 14, 16. This may be accomplished by simply depositing an adhesive on each flap 22 in the region of both ~
reference A and the associated lateral margin and then folding -the diaper longitudinally about reference line A to form a fold .: .
line 28 (see Fig. 1). As is evident from Fig. 1, the resulting -diaper is a neatly folded rectangle which is very convenient for efficient packaging and for use by the consumer. After the adhe-sive has set, the unfolding of the diaper along fold line 28 will result in an automatic flaring or fanning out of the diaper longitudinal end regions (i.e., the waistline regions) as com-pared to the longitudinal central region (i.e., the crotch region), thereby presenting a diaper configuration which facili-tates application to an infant. As will be evident to -those skilled in the art, this configuration is produced by the above-mentioned foreshortening of portions of the flap 22 with respect to either the associated fold line 20 or the initial, uncon-,. ,, , . ,. ,. , ., . ........................ , :
- - . . .
. .
.

strained length of the associated lateral margin 14, 16.
Fig. 3 illustrates in detail the preferred system for accomplishing the foreshortening which involves the use of the adhesive, all as described above. With the point 30 defining the diaper's longitudinal midpoint on the backing sheet 10, the glue is deposited on the flap adjacent that point. With the location 34 being the furthest longitudinal distance of the glue 32 from the point 30, the amount of foreshortening will be just twice the distance, along the surface of the flap 22, between the points 30 and 34.
There are, of course, many other ways of achieving the foreshortening required by the present invention. For example, tape strips may be utilized to secure the tucks in the flaps, or the flaps may be laterally cut adjacent fold line 28 and the flaps foreshortened without forming a tuck by use of suitable securing means. ~he preferred method of manufacture described above, however, is believed to define an especially convenient and inexpensive way to manufacture a diaper according to the present invention.
For purposes of comparison, a typical commercially available, prior art diaper is illustrated in Figs. 4-fi. The prior art diaper also includes a plastic backing sheet 36 secured to an absorbent body or pad 38 along heat seal lines 42.
The diaper's box pleat configuration (best seen in Fig. 6) defined by longitudinally extending fold lines 44, 46 is main-tained by longitudinally central spots of adhesive 48 which secure adjacent surfaces of the pleated absorbent body 38.
Comparison of Figs. 1 and 4 reveals that the diaper ;~
constructed according to the present invention is capable of being folded into as convenient a shape for commercial packaging .. . . .. . . . . . .
, , ., . . . :

465~2 as the commercial prior art diaper~ Importantly, however, upon unfolding the prior art diaper along its central lateral fold -line 50, the consumer is presented with a rectangular box pleat diaper in which the still pleated front and back waistline regions 52 and 54, respectively~ must be manually flared out dur-ing the application of the diaper to an infant.
As used herein the references to the "longitudinal midpoint" of the diaper or the "longitudinally central portion"
of the diaper are not intended to imply that the mathematically -precise midpoint is required for whatever structure is being referred to by those terms. For example, as is well known in the art, in certain prior art constructions the glue spots 48 and the fold line 50 may be off-set from the exact midpoint of -~
the diaper to achieve a diaper construction in which one longi-tudinal "half" is longer than the other. This is indicated in Fig. 4 where the lower longitudinal "half" is longer than the upper longitudinal "half" of the diaper by the amount indicated at 56. Typically, the longer half is placed at the back side of the infant and the shorter half on the front side of the infant.
While a particular preferred embodiment has been des-cribed in detail and illustrated in the accompanying drawing, other embodiments are within the scope of the invention and the following claims.

. - . . . . .
,

Claims (16)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A disposable diaper comprising a flexible waterproof back sheet and an overlying absorbent pad, the diaper having a series of longitudinal folds forming said back sheet and pad into a box pleat configuration which includes a pair of outwardly directed flaps, each flap defined by an outermost longitudinal fold and the adjacent diaper lateral edge, the diaper being further provided with a lateral fold line about which it is folded for shipping and storage, each said flap being longitudinally foreshortened at said lateral fold line such that the fore-shortening does not interfere with folding about said lateral fold line and provides automatic fanning out of the box pleat configuration upon unfolding along said lateral fold line.
2. A diaper as claimed in Claim 1 wherein the foreshortened portion of each flap comprises a longitudinal self-overlapping of the flap.
3. A diaper as claimed in Claim 2 wherein said self-overlapping is disposed substantially at the longitu-dinal midpoint of each said flap.
4. A diaper as claimed in Claim 3 wherein the diaper is further provided with a lateral fold in substant-ially the longitudinal midpoint of the diaper, said self-overlapping of each flap comprising an adherence of a region of the flap on one side of said lateral fold to a region of the flap on the other side of said lateral fold.
5. A diaper as claimed in Claim 4 wherein said flap regions are adhered to each other with glue.
6. In a disposable diaper comprising an ab-sorbent body folded along a lateral fold line in a control portion of the diaper, diaper end margins defining front and back waistline regions, lateral margins extend-ing between said end margins, each lateral margin having a predetermined unconstrained length between said end margins, the improvement wherein the length of a lateral margin is foreshortened from its unconstrained length at the lateral fold line such that the foreshortening does not interfere with the folding about the lateral fold line and provides automatic fanning out of the diaper when unfolded along said lateral fold line.
7. The method of manufacturing a disposable diaper comprising the steps of overlying a flexible waterproof backing sheet with an absorbent pad, longitudinally folding said backing sheet and pad to form a box pleat configuration which includes a pair of outwardly directed flaps, depositing glue on a portion of each said flap adjacent the longitudinal midpoint of the flap, and folding the diaper about a lateral fold line adjacent said deposited glue to secure the portion to which glue is applied to an overlapping portion of said flap to effectively shorten the flaps whereby upon unfolding along said lateral fold line the box pleat configuration auto-matically fans out.
8. A disposable diaper comprising a flexible waterproof back sheet and an overlying absorbent pad, the diaper having a series of longitudinal folds forming said back sheet and pad into a box pleat configuration which includes a pair of outwardly directed flaps, each flap defined by an outermost longitudinal fold and the adjacent diaper lateral edge, a tuck secured in each of said flaps adjacent the longitudinal centre of the diaper whereby the diaper may be folded along a lateral fold line extending between the tucks and upon unfolding the box pleat configuration will automatically fan out.
9. In a disposable prefolded rectangular diaper of the wing fold type having top and side edges in which side portions of the diaper are first folded inwardly, in which marginal portions are then folded outwardly, and in which the diaper is further folded approximately in half along a lateral fold line the improvement wherein the facing surfaces of the folded diaper are securely fastened together at each of the side edges in an area closely adjacent the lateral fold in a manner to shorten each of said side edges to prevent extension of the side edges to full length and to provide downwardly extending fin portions adjacent the lateral fold of each of said side edges the shortening of the side edges being effective to cause automatic fanning out of the diaper upon unfolding about said lateral fold line, said fin portions being retained when the prefolded diaper is opened up and applied to an infant.
10. The prefolded diaper of Claim 9 wherein said wing fold comprises a longitudinal wing fold.
11. The prefolded diaper of Claim 9 wherein said side edges are shortened in an amount in the range of 8 to 14 percent of the original diaper length.
12. The prefolded diaper of Claim 9 wherein the side edges of said downwardly extending fin portions are sealed.
13. In a disposable prefolded rectangular diaper of the wing fold type having top and side edges in which side portions of the diaper are first folded inwardly, in which marginal portions are then folded outwardly, and in which the diaper is further folded approximately in half along a lateral fold line; the improvement wherein the facing surfaces of the folded diaper are securely fastened together at each of the side edges in an area closely ad-jacent the lateral fold in a manner to shorten each of said side edges to prevent extension of the side edges to full length and to provide secured portions adjacent the lateral fold of each of said side edges, which secured portions are detained to cause automatic fanning out of the diaper when the prefolded diaper is opened up and applied to an infant.
14. The prefolded diaper of Claim 13 wherein said wing fold comprises a longitudinal wing fold.
15. The prefolded diaper of Claim 13 wherein said side edges are shortened in an amount in the range of 8 percent to 14 percent of the original diaper length.
16. The prefolded diaper of Claim 13 wherein the side edges of said secured portions are sealed.
CA 208410 1973-09-13 1974-09-04 Disposable diaper Expired CA1084652A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US05396835 US4108179A (en) 1973-09-13 1973-09-13 Disposable diaper
US396,835 1995-03-01

Publications (1)

Publication Number Publication Date
CA1084652A true CA1084652A (en) 1980-09-02

Family

ID=23568820

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 208410 Expired CA1084652A (en) 1973-09-13 1974-09-04 Disposable diaper

Country Status (11)

Country Link
US (1) US4108179A (en)
JP (1) JPS5828361B2 (en)
BE (1) BE819911A (en)
CA (1) CA1084652A (en)
DE (1) DE2443739A1 (en)
DK (1) DK139455C (en)
ES (1) ES223910Y (en)
FR (1) FR2243660B1 (en)
GB (1) GB1449423A (en)
LU (1) LU70883A1 (en)
NL (1) NL7412079A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1175602A (en) * 1981-07-17 1984-10-09 Mohammed I. Aziz Disposable absorbent article having elasticized flaps provided with leakage resistant portions
US5380310A (en) * 1982-06-02 1995-01-10 Kaysersberg, S.A. Disposable sanitary article for incontinent persons
US4662874A (en) * 1983-08-03 1987-05-05 Johnson & Johnson Body member conformable disposable articles
US4596244A (en) * 1984-02-17 1986-06-24 Kimberly-Clark Corporation Perineal drape
US4731070A (en) * 1984-04-19 1988-03-15 Personal Products Company Adult incontinent absorbent article
US4946454A (en) * 1987-04-29 1990-08-07 Kimberly-Clark Corporation Perineal shield and discharge containment flap
US4906243A (en) * 1988-02-02 1990-03-06 Mary Dravland Combination diaper and training pants
US5318553A (en) * 1988-09-28 1994-06-07 Weeks L Jane Absorbent pad with dryness characteristics
US5716349A (en) * 1991-07-23 1998-02-10 The Procter & Gamble Company Absorbent article having longitudinal side margins with tucks
CA2112276C (en) * 1992-12-31 2005-07-12 Tong-Ho J. Hsieh Absorbent article having flexible bending axes
JP3429656B2 (en) * 1998-01-30 2003-07-22 ユニ・チャーム株式会社 Disposable diapers
US6361527B1 (en) 1999-10-21 2002-03-26 Kimberly-Clark Worldwide, Inc. Three-dimensional pocket garment
JP2002000631A (en) * 2000-06-19 2002-01-08 Uni Charm Corp Disposable diaper
US20040102753A1 (en) * 2002-11-26 2004-05-27 Kimberly-Clark Worldwide, Inc. Male incontinence absorbent article and method of producing same
US20050256494A1 (en) * 2004-04-29 2005-11-17 Kimberly-Clark Worldwide, Inc. Easy open diaper
US20170326006A1 (en) * 2014-12-19 2017-11-16 Kimberly-Clark Worldwide, Inc. Absorbent article having longitudinal direction folded side regions

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572342A (en) * 1968-01-19 1971-03-23 Johnson & Johnson Diaper
US3816227A (en) * 1970-05-28 1974-06-11 Colgate Palmolive Co Expandable article
US3744494A (en) * 1970-07-10 1973-07-10 Procter & Gamble Disposable diaper with improved containment characteristics
US3710797A (en) * 1971-02-26 1973-01-16 Procter & Gamble Disposable diaper
US3776233A (en) * 1971-05-17 1973-12-04 Colgate Palmolive Co Edge contourable diaper
US3731688A (en) * 1971-06-30 1973-05-08 Techmation Corp Disposable diaper
US3828784A (en) * 1972-08-21 1974-08-13 Kendall & Co Conformable baby diaper

Also Published As

Publication number Publication date Type
DK139455C (en) 1979-09-17 grant
BE819911A1 (en) grant
DK139455B (en) 1979-02-26 grant
JPS5828361B2 (en) 1983-06-15 grant
FR2243660A1 (en) 1975-04-11 application
CA1084652A1 (en) grant
ES223910Y (en) 1978-07-16 grant
DE2443739A1 (en) 1975-03-20 application
FR2243660B1 (en) 1978-05-12 grant
LU70883A1 (en) 1975-01-02 application
NL7412079A (en) 1975-03-17 application
US4108179A (en) 1978-08-22 grant
JP1195681C (en) grant
DK481174A (en) 1975-05-12 application
BE819911A (en) 1974-12-31 grant
ES223910U (en) 1977-01-01 application
JPS5077143A (en) 1975-06-24 application
GB1449423A (en) 1976-09-15 application

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