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Publication numberUS3848597 A
Publication typeGrant
Publication dateNov 19, 1974
Filing dateJul 5, 1973
Priority dateJul 5, 1973
Publication numberUS 3848597 A, US 3848597A, US-A-3848597, US3848597 A, US3848597A
InventorsD Endres
Original AssigneeKimberly Clark Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Prefolded disposable diaper
US 3848597 A
Abstract
A prefolded disposable diaper utilizing an inward longitudinal fold at each edge in combination with triangular shaped folds adjacent the leg area. An improved arrangement for pressure sensitive fastening tapes is also disclosed.
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Description  (OCR text may contain errors)

mted States Patent 1191 1111 3,8 Endres Nov. 19, 1974 [54] PREFOLDED D1S1POSABLE DIAPER 3,638,651 2/1972 Torr 128/284 3,642,001 2/1972 Sabee 128/287 [75] lnvemor- Endres, Appleton 3,763,863 10/1973 Mesek et al. 128/287 [73] Assignee: Kimberly-Clark Corporation,

Neenah, Primary Examiner-Richard A. Gaudet Assistant Examiner-Rick Opitz 22 Fl (1. l 1 1e July 5 1973 Attorney, Agent, or Fzrm-Damel J. Hanlon, Jr.; [21] Appl. No.: 376,381 William D. Herrick; Raymond J. Miller [52] U.S.CCI. 128/287 [57] ABSTRACT 51 I t. l. ..A6lf13 6 g 5 L of Search 128/284 286 4: A prefolded disposable diaper utilizing an mward longitudinal fold at each edge in combination with triang- [56] References Cited ular shaped folds adjacent the leg area. An improved arrangement for pressure sensitive fastening tapes is UNITED STATES PATENTS also disclosed 3,196,874 7/1965 Hrubecky 128/287 3,572,342 3/1971 Linquist et a1 128/287 5 Claims, 11 Drawing Figures PREFOLDED DISPOSABLE DIAPER BACKGROUND OF THE INVENTION In the art of disposable diapers it is known that by prefolding rectangular diapers in a suitable manner it is possible to provide a somewhat better leg fit at the inner thigh when compared to diapers without a prefold. The better fit thus provided tends thereby to minimize leakage of both fluid and solid excrement. However, there is always a need for still further improvements in fold configurations which result in still better leakage control. This invention is directed to one such improvement.

An example of a commercial form a prefolded disposable diaper which is applied in part to the improved structure of this invention may be found in U.S. Pat. No. 3,196,874 to Hrubecky and assigned to the assignee of this invention. The diaper described in that patent, has inward and outward diagonal folds on each side of a central pocket at the medial transverse fold line which form leg receiving areas on each side of the diaper. The style of fold defined in the Hrubecky patent will for convenience, sometimes be referred to hereinafter as a triangular wing fold.

SUMMARY OF THE INVENTION The invention is directed to an improvement in prefolded rectangular-shaped disposable diapers of the triangular wing fold type.

In the improved structure, a narrow panel section extending the full length of the rectangular diaper is folded inwardly along each edge. The inner contacting faces of the panels formed by these folds are then secured to the face of the diaper in areas adjacent to and spaced a short distance from the transverse mid-line of the diaper measured along its length. The width of these panel sections is preferably 1 inch, but may vary from inch for small new-born size diapers to the 1% inches for larger size diapers. When the edge panel sections are folded over and secured as indicated, the diaper is then folded in the manner similar to that described in US. Pat. No. 3,196,874. That is, the diaper which has been narrowed down by the longitudinal edge folds forming the narrow panel sections at each edge is now further folded transversely in half into approximate half sections. Each half section'including the narrow edge panel section is then folded inwardly on a first pair of diagonal lines starting from near the midpoint of the transverse fold and extending away from each other to the edge of the fold which defines the respective longitudinal edge panel sections and at a point short of the diaper ends. Each half section of the diaper again including the prefolded narrow edge panel sections, is then folded outwardly along a second pair of diagonal fold lines with each of said fold lines starting from a point on the transverse fold located midway between the center of the transverse fold and the edge of the fold which defines the narrow panel sections, and extending to the edge of the narrow panel section fold to tenninate at approximately the same point on the edge fold as the first diagonal folds.

In this improved fold, the amount of absorbent'material within the area defined by the narrow edge panel sections may also be reduced in thickness tomake that area less bulky if desired.

The prefolded narrow panel sections at each edge of the diaper also make possible a simplified arrangement for the fastening tapes, which is another aspect of the invention. In such an arrangement, a strip of tape is affixed to each comer of the face of the diaper with the pressure sensitive side of the tape facing upward. Release strips are located on the diaper face at a position where when the edge panel sections are folded, the pressure sensitive areas of the tape will press against, and be releasably held by, the release strips. In applying the diaper to the child, the panel sections are unfolded at the ends and the pressure sensitive tape is thereby, pulled away from the release strip' and is ready for use in attaching the diaper in place on the child.

The above folded structure and other features of the invention will be more clearly understood by reference to the following detailed description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a plan view of the face of a rectangular diaper before folding.

FIG. 2 is a plan view of the diaper of FIG. 1 in which a narrow panel section has been folded inwardly along each edge.

FIG. 3 is a section taken through line 3-3 of FIG. 1.

FIG. 4 is a section taken through line 4-4 of FIG. 2.

FIG. 5 is a perspective view of the diaper of FIG. 2.

FIG. 6 is a perspective view of the diaper of FIG. 5 with the diagonal folds partially developed.

FIG. 7 is a perspective view of the diaper of FIGS. 5 and 6 with the diagonal folds more fully developed.

FIG. 8 is a perspective view of the final folded diaper configuration.

FIG. 9 is another plan view of the face of the diaper before folding illustrating an improved tape fastening arrangement.

FIG. 10 is a plan view of the FIG. 9 diaper with the narrow edge panel sections folded inwardly.

FIG. 11 is a section taken through line lll1 of FIG. 10.

DETAILED DESCRIPTION OF THE DRAWINGS AND PREFERRED EMBODIMENTS OF THE INVENTION In the plan view of FIG. 1, the facing surface of the diaper is a fluid-pervious liner 10 of any conventional structure. Many variations of such liners are wellknown, and they may include non-woven sheets, woven gauze, scrimreinforced materials, perforated films, etc. The liner may be hydrophobic or hydrophilic, but must be fluid-pervious for efficient transfer of fluids to the inner absorbent pad. FIG. 1 also shows conventional arrangement for pressure sensitive fastening tapes at 12.

By referring to FIG. 3 it will be noted that the rest of the diaper is also of conventional construction. It has a central main absorbent pad 14 which may be multilayers of cellulose wadding or a mat of loosely associ-' ated wood pulp'fibers, or other absorbent fibers such as cotton, rayon or modifications thereof. The absorbent pad 14 is bottomed by an impervious backing 16 which may comprise a thin plastic film or other flexible sheet treated for fluid repellancy. In this embodiment, the backing extends around the edges of pad 14 and under liner l and is secured to line along its length. In other embodiments, the backing and liner may also be coterminous and secured to each other along the pad edges, or the backing may extend over the liner edges and be secured to the top of the liner. Many other variations are possible.

In any event, any of the known disposable diaper construction, of which there are many, may be adapted to the improved prefolded structure as disclosed herein.

Returning now to FIG. 1 it will be noted that along each edge there is marked off a narrow longitudinal panel section 18, demarcated by lines 19. It is preferred that these panel sections be from about inch to 1%. inches wide. On each of these panel sections 18 and spaced from transverse center line 20 are adhesive spots 21. These adhesive spots or similar attachment means are utilized to firmly attach the longitudinal edge panels 18 to the face of liner 10 after the panels are folded along line 19 as shown in FIG. 2. It is preferred that these spots be spaced a distance of about I inch from the transverse center line 20.

As further shown in FIG. 2, the backing side of longitudinal edge panels 18 now faces upward. At this stage of folding, the diaper with its longitudinal edges folded inward is now narrower than the unfolded form of the diaper by the sum of the width of these folded edge panel sections.

This narrowed down diaper, with the longitudinal edge panels 18 folded over and held in place by adhesive spots 21 is now folded into a triangular wing fold, with the folds 19 which define the narrow edge panel section now comprising the narrowed down diaper edges. Thus, the narrow panel sections in their prefolded condition are folded once again along the diagonal and transverse lines which define the triangular wing fold.

The triangular wing fold of the narrowed down diaper is achieved by first folding the diaper transversely in half along line 20, and then folding the diaperinwardly along diagonal lines 22 and outwardly on diagonal lines 22.

The diaper with its completed fold is shown in FIG. 8, and the various stages of the folding sequence as it develops are shown in the series of FIGS. 5 to 8.

The completed prefolded diaper is narrower and more compact than the prior art diaper in US. Pat. No. 3,196,874. When applied to the infant, the narrow edge panel sections are completely unfolded at the ends only, in order to permit fastening of the corners together at the waist. The central portion of each of the narrow edge panels remains folded because of the adhesive spot bonds previously mentioned. The backing sheet which covers the longitudinal edge panel at the transverse medial fold lines thus will contact the infants thighs and provide a close fit in that area even though the ends of the diaper are spread open at the waist and attached with tapes 12 in the conventional manner.

When the performance of the prefolded diaper as described herein was compared with the performance of the prior art US. Pat. No. 3,196,874 diapers a significant improvement was noted in minimizing leakage incidents. This is attributed to the spring-like action which the longitudinal fold in combination with the triangular panels formed by the diagonal folds exert against the inner thigh when the diaper is worn. However, such attribution is only theoretical, as the exact reason for improved leakage performance is not known. In any event an improvement in leakage control did occur when this diaper structure was compared with a triangular wing fold diaper without the additional longitudinal edge folds.

When this improved fold is used, the amount of disposable material within the area defined by the narrow edge panel may also be reduced to make that area thinner and less bulky. Such modification permits easier folding and retention of the folds in the finished diaper and does not appear to materially affect the improved performance which the narrow edge folds provide.

The employment of the narrow edge panels in the improved construction defined herein also permits a simplified arrangement for the pressure sensitive fastening tapes used to attach the diaper to the child. This simplified arrangement is shown in detail in FIGS. 9 through 1 1 In FIG. 9, which is a plan view similar to FIG. 1, each of the lower corners of the diaper has a strip of pressure sensitive tape 32 affixed to the surface of the diaper with the pressure sensitive surface of the tape facing upward. Adjacent to each of these strips and across fold line 19 from the tape itself are two matching strips of release paper 34. When narrow edge panel sections 18 are folded over onto the face of the diaper as shown in FIG. 10, pressure sensitive surface 33 of tape 32 is pressed into contact with release strip 34 as shown in FIG. 11, where it is releasably held in place. When the diaper is to be applied to the child, the comers of the narrow edge panels are pulled open exposing the pressure sensitive tape surface which then may be applied to the matching corner at the opposite end of the diaper in the customary way when attaching the diaper to the child. It should be noted that in this arrangement, no free ends of the fastening tapes extend beyond the edge of the diaper but the entire tape is within the diaper margins.

While the versions of the diaper depicted in the drawings are idealized for clarity, it will be understood that in a mass manufacturing process the folds will not necessarily be as precise as shown. However, the general configuration is intended to follow the drawings except that the triangular sections need not come to a point at the center of the diaper. For example, a central flat portion on the transverse fold line may separate points where the inner diagonal lines centrally intercept the transverse fold line without changing performance materially.

When the diaper is in its prefolded configuration, adhesive securement means may be used, if desired, in the triangular areas where like surfaces contact each other as is frequently done in prior art prefolded diapers. The function of adhesive securements, of course, is to maintain the diaper folds in better operational condition when the diaper is worn.

What is claimed is:

1. A prefolded disposable diaper of generally elongate rectangular shape having a central absorbent pad, a fluid permeable face, a fluid impermeable backing, two side edges and two ends; a narrow panel section at each of said edges being folded inwardly to thereby narrow the transverse dimension thereof; the internal face of each of said inwardly folded narrow panel sections being securely attached to the face of said diaper at areas adjacent to and spaced a short distance from the transverse mid-line of said diaper; said narrowed diaper and said folded narrow panel sections being folded in half transversely into diaper half sections with the fluid permeable face portions disposed on the interior of said transversely folded diaper; each of said half sections including said narrow panel sections being folded inwardly on a first pair of diagonal lines starting from near the midpoint of said transverse fold and extending away from each other to the edge of the fold defining said narrow panel section and at a point short of said diaper ends; each of said half sections including said narrow panel section also being folded outwardly along a second pair of diagonal fold lines with eachof proximately the same point as each of said first pair of diagonal folds, the attachment of said narrow panel sections being such that the full width of the inward fold of the narrow panel sections adjacent the transverse mid-line of the diaper is maintained when worn.

2. The diaper of claim 1 wherein the width of said narrow panel section is from about inch to 1% inches. a r

3. The diaper of claim 1 wherein the area at which the internal face of each of said inwardly folded narrow panel sections is attached to the face of the diaper is spaced about 1 inch from said transverse mid-line.

4. The diaper of claim 1 wherein contacting surfaces near the transverse fold area are also adhered to each other in selected areas to assist in maintaining the prefolded condition.

5. The diaper of claim 1 wherein a strip of pressure sensitive tape is affixed to the face of the unfolded diaper at each of the diaper comers at one end of the diaper, with the pressure sensitive surface of said tape facing upward, and matching strips of release material are affixed on the face of the diaper at the same end across from and adjacent to the fold line defining said narrow panel sections.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3196874 *Jul 25, 1962Jul 27, 1965Kimberly Clark CoDisposable prefolded diaper
US3572342 *Jan 19, 1968Mar 23, 1971Johnson & JohnsonDiaper
US3638651 *Oct 8, 1969Feb 1, 1972Georgia Pacific CorpDiapers
US3642001 *Jul 27, 1970Feb 15, 1972Reinhardt N SabeeDisposable diaper or the like
US3763863 *Oct 7, 1971Oct 9, 1973Johnson & JohnsonDisposable diaper
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3901239 *Jul 18, 1974Aug 26, 1975Johnson & JohnsonDisposable diaper with permanently attached adhesive tabs and permanently attached cover strips
US3954106 *Jan 8, 1975May 4, 1976Johnson & JohnsonDisposable diaper having an off-set tab fastener means and release facing on diaper outer surface
US3995637 *Dec 17, 1975Dec 7, 1976Colgate-Palmolive CompanyDiaper with waist means
US4050463 *Aug 20, 1976Sep 27, 1977Colgate-Palmolive CompanyDiapers
US4055181 *Feb 4, 1976Oct 25, 1977Johnson & JohnsonTape closure having release means integral with diaper backing sheet
US4084592 *Jan 8, 1975Apr 18, 1978Johnson & JohnsonDisposable prefolded diaper with permanently attached adhesive closure system
US4085754 *Mar 3, 1976Apr 25, 1978Johnson & JohnsonDisposable diaper inner facing
US4194507 *Oct 17, 1977Mar 25, 1980Johnson & JohnsonDisposable diaper inner facing
US4650483 *Jan 31, 1986Mar 17, 1987The Procter & Gamble CompanyWaste-containment garment having integrally protected adhesive fasteners
US4985025 *Jan 31, 1986Jan 15, 1991Mcneil-Ppc, Inc.Adhesive closure system for disposable diapers
US5454803 *Aug 31, 1994Oct 3, 1995The Procter & Gamble CompanyAbsorbent article having inflected barrier cuffs
US5496428 *Jun 16, 1994Mar 5, 1996The Procter & Gamble CompanyProcess for making an absorbent article having inflected barrier leg cuff
US5542943 *Nov 9, 1994Aug 6, 1996The Procter & Gamble CompanyAbsorbent article having inflected barrier cuffs and method for making the same
US5577540 *Apr 12, 1995Nov 26, 1996The Procter & Gamble CompanyAbsorbent article having inflected barrier cuffs and method for making the same
US5662636 *Sep 21, 1994Sep 2, 1997The Procter & Gamble CompanyAbsorbent article having cuffs with unsecured rear distal edges
US6363890 *Mar 6, 1998Apr 2, 2002Kenneth C. BeckPackage for animal bedding pads
US7318820Mar 12, 2004Jan 15, 2008The Procter & Gamble CompanySimple disposable absorbent article having breathable side barriers
US7320684Sep 21, 2005Jan 22, 2008The Procter & Gamble CompanyDisposable absorbent article having deployable belt strips
US7322925Dec 15, 2005Jan 29, 2008Kimberly-Clark Worldwide, Inc.Apparatus and method for making pre-fastened absorbent undergarments
US7335150Dec 15, 2005Feb 26, 2008Kimberly-Clark Worldwide, Inc.Apparatus for making pre-fastened absorbent undergarments
US7377914Jun 30, 2005May 27, 2008The Procter & Gamble CompanyDisposable absorbent article having backsheet strips
US7524313Nov 8, 2002Apr 28, 2009The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US7618404Jun 23, 2005Nov 17, 2009The Procter & Gamble CompanyDisposable absorbent article having doubled side flaps and backsheet strips
US7695463Jun 22, 2005Apr 13, 2010The Procter & Gamble CompanyDisposable absorbent article having dual layer barrier cuff strips
US7736351Feb 2, 2004Jun 15, 2010The Procter & Gamble CompanySimple disposable absorbent article
US7737324Nov 23, 2005Jun 15, 2010The Procter & Gamble CompanyDisposable absorbent article having deployable chassis ears
US7763004May 18, 2005Jul 27, 2010The Procter & Gamble CompanyDisposable absorbent article having layered containment pockets
US7857801Mar 23, 2007Dec 28, 2010The Procter & Gamble CompanyDiaper having deployable chassis ears and stretch waistband
US7901392Jan 30, 2008Mar 8, 2011The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US7931636Aug 4, 2005Apr 26, 2011The Procter & Gamble CompanySimple disposable absorbent article
US8016807Apr 1, 2010Sep 13, 2011The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US8048051Apr 1, 2010Nov 1, 2011The Proctor & Gamble CompanyRefastenable absorbent article and a method of applying thereof
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US8142411Apr 8, 2009Mar 27, 2012The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US8187239May 31, 2005May 29, 2012The Procter & Gamble CompanySide notched folded diaper
US8257335Jan 31, 2007Sep 4, 2012The Procter & Gamble CompanyDiaper having hip stretch panels
US8292866Apr 1, 2010Oct 23, 2012The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US8425484Sep 2, 2011Apr 23, 2013The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
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US8486849Apr 1, 2010Jul 16, 2013The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US8585672Feb 28, 2007Nov 19, 2013The Procter & Gamble CompanyDisposable absorbent article having deployable belt ears
US8601665Jan 20, 2011Dec 10, 2013The Procter & Gamble CompanyRefastenable absorbent article
US8617131Nov 23, 2011Dec 31, 2013The Procter & Gamble CompanyRefastenable absorbent article and a method of applying thereof
US8684988Jun 29, 2004Apr 1, 2014The Procter & Gamble CompanyDisposable absorbent article having barrier cuff strips
US8684990Sep 12, 2005Apr 1, 2014The Procter & Gamble CompanySimple disposable pant-like garment having breathable side barriers
US8734417Apr 19, 2011May 27, 2014The Procter & Gamble CompanySimple disposable absorbent article
US8979815Dec 10, 2012Mar 17, 2015The Procter & Gamble CompanyAbsorbent articles with channels
US8998873Jan 20, 2011Apr 7, 2015The Procter & Gamble CompanyRefastenable absorbent article
US9060904Jun 18, 2008Jun 23, 2015The Procter & Gamble CompanyDisposable absorbent article with sealed absorbent core with substantially continuously distributed absorbent particulate polymer material
US9066838Jun 8, 2012Jun 30, 2015The Procter & Gamble CompanyDisposable diaper having reduced absorbent core to backsheet gluing
US9072634Jun 18, 2008Jul 7, 2015The Procter & Gamble CompanyDisposable absorbent article with substantially continuously distributed absorbent particulate polymer material and method
EP1177782A1 *Jul 2, 2001Feb 6, 2002Uni-Charm CorporationDisposable garment
EP1495739A1 *Mar 13, 2003Jan 12, 2005Uni-Charm Co., Ltd.Underpants type disposable diaper
EP1552799A1 *Aug 26, 2003Jul 13, 2005Uni-Charm Co., Ltd.Disposable diaper inside leg bending device and inside leg bending method
Classifications
U.S. Classification604/390, 604/375, D24/126, 604/365
International ClassificationA61F13/15
Cooperative ClassificationA61F13/49001
European ClassificationA61F13/49A