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Publication numberUS3814100 A
Publication typeGrant
Publication dateJun 4, 1974
Filing dateMar 1, 1972
Priority dateApr 28, 1970
Also published asCA952256A1, DE2112313A1, DE2112313B2, US3667468, US3746592
Publication numberUS 3814100 A, US 3814100A, US-A-3814100, US3814100 A, US3814100A
InventorsIntosh B Mc, E Nystrand
Original AssigneePaper Converting Machine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Disposable diaper
US 3814100 A
Abstract
A disposable diaper having a C-folded pad within a wrapping envelope, the envelope being substantially wider than the C-folded pad to provide side flaps adapted to initially underlie the pad and be selectively folded outwardly for securing the pad in place, the C-fold providing a lined channel on one side of the pad which encourages more even, rapid, and complete dispersion of body fluid.
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Description  (OCR text may contain errors)

United States Patent 1 l 3,814,100 Nystrand et al. 1 June 4, 1974 i 1 DISPOSABLE DIAPER 3.364.931 1/1968 Hirsch l29/290R W51 Daniel M Brian 111283115 Zllfiii ilie'ififffijij...,iijiiiiiiijiiiiiii 1321523 Mclntosh, both of Green Bay, Wis.

Primary Examiner-Charles F. Rosenbaum Attorney, Agent, or Firm-Dawson. Tilton, Fallon 5S4 Lungmus [57] AESTRACT A disposable diaper having a C-foldeci pad within a wrapping envelope. the envelope being substantially wider than the C-folded pad to provide side flaps adapted to initially underlie the pad and be selectively folded outwardly for securing the pad in place, the C fold providing a lined channel on one side of the pad which encourages more even, rapid, and complete dispersion of body fluid.

8 Claims, 9 Drawing Figures {73] Assignee: Paper Converting Machine Co., Inc.,

Green Bay, Wis.

[22] Filed: Mar. 1, 1972 [21] Appl. No.: 230,644

Related U.S. Application Data [63] Continuation-impart of Ser. No. 32.560. April 28.

. l970. Pat. No, 3.667.468.

[52] U.S. Cl. 128/287 lSl] int. Cl A411) 13/02 [58] Field of Search l28/284, 286. 287, 290, 128/296 [56] References Cited UNITED STATES PATENTS 3.065.75l ll/l962 Gohho. Sr. et Zll. 128/287 PATENTEDJUH 4 1914 SHEET 1 UF 3 FIGZ l|llllllll lllll|ullllllllllullllu lllllllllllv'lllllllll PATENTEDJBH 4 m4 SHEU 2 0F 3 FIG.4

DISPOSABLE DIAPER This application is a continuation-in-part of our copending application Ser. No. 32.560, filed Apr. 28, 1970, now Pat. No. 3,667,468.

BACKGROUND AND SUMMARY OF INVENTION DETAILED DESCRIPTION OF THE INVENTION The invention is described in conjunction with the accompanying drawings, in which:

FIG. I is an elevational view of the diaper just prior to application on a baby;

FIG. 2 is a side elevational view;

FIG. 3 is a cross-sectional view seen along the line 3-3 of FIG. 1;

FIG. 4 is a perspective view of the diaper configuration in the form it assumes when applied on a baby",

FIG. 5 is a side elevational view, partially schematic, of apparatus employable in the practice of the inventive method; and

FIGS. 6-9 are fragmentary enlarged cross-sectional views of the diaper at various stages of its development corresponding to the sight lines 6+6, 7--7, 8-8, and 9-9, respectively, as applied to FIG. 5.

In the illustration given, and with particular reference to FIG. 3, the numeral 10 designates generally a C folded pad of fluff or like soft absorbent material. It will be seen that the pad is achieved by folding, as at I l and 12 (still referring to FIG. 3), to develop a C-shape in cross section wherein there is a central channel 13. The channel 13 is essentially T-shaped and is defined by the inner pad portions 14 and 15 in combination with the outer pad portion 16. The transverse spacing between the inner pad portions 13 and I4 is normally of the order of one inch to one and one/quarter inch, which provides more comfort for a male baby. It also provides a receptacle for the solids and makes the pad more form-fitting in the crotch. When folded as just indicated, the pad I0 is generally rectangular in plan, with the longer dimension being parallel to the length of the channel I3.

Advantageously the pad fluff or like soft, moistureabsorbent material is completely wrapped or encased in a wadding web 17, also of moisture-absorbent material. This web 17 is likewise disposed in a C shape in cross section, and can be advantageously provided in the form of the carrier sheet to be described hereinafter upon which the fluff is deposited incident to manufacture of the diaper. Alternatively, the wadding web 17 may be introduced after the pad is formed. In either case it is wrapped around the pad before the C-folding takes place. The wadding web 17 is seen to consist of a single sheet with an overlap, as at 18, within the chan nel 13. In this fashion there is an extra dispersion sheet within the channel 13 which improves the absorbing qualities of the pad. Further, this facilitates the manufacturing operation to be described hereinafter.

The pad I0 complete with wadding web 17 is posi tioned within an enveloping wrap generally designated 19 and which is seen to consist of two generally rectangular, coextensive sheets arranged on opposite sides of the pad 10. Adjacent the inner pad portions 13 and 14, i.e., on the side of the diaper facing the baby, we pro vide a substantially moisture-pervious sheet 20 which advantageously may be constructed of non-woven or like material that has the absorbing qualities and wet strength needed as well as being comfortable for the baby. Adjacent the other side of the pad I0, i.e., adjacent the outer pad portion I6, we provide a second sheet 21. This sheet 21 is constructed of substantially moisture-impervious material such as polyethylene or like material of proper strength and moisture-repelling qualities. The moisture-pervious sheet 20 and moisture-impervious sheet 21 are perimetrically united, as by lines of adhesive at 22 and 23, along the longitudinal side edges, and, at 24 and 25, at the extreme transverse edges thereby developing an envelope. It will be noted that the length of the pad 10 is less than the length of the envelope 19, thereby providing reduced thickness ends as at 26 and 27 (see FIG. 2).

Additionally, the sheets 20 and 21 are united along transverse lines, as at 28 and 29, which immobilize the pad I0 in place. Still further, the sheets 20 and 21 are united along the longitudinal edges of the Tl-folded pad 10, as at 30 and 31, to further immobilize the pad and develop side flaps which are generally designated 32 and 33. V

Advantageously, the side flaps 32 and 33 are folded under the diaper" this in the sense that the channel 13 is positioned uppermost when the diaper is laid on a changing table incident to applying the same on a baby. In the illustration given, the side flaps are seen to be reverse-folded, as at 34 and 35, to develop a gusset arrangement.

To further assist in the development of anadvantageous diaper configuration of the type depicted in FIG. 4 we povide additional spots of adhesive as at 36 and 37, these being between the reverse fold lines 34 and 35 and the associated edges of the C-folded pad 10, and are effective to join the side flaps 32 and 33 centrally longitudinally to the moisture-impervious sheet 23. This prevents the gussets from being completely pulled out round the leg portion of the baby. and insures that the pad is held snugly against the baby.

From the foregoing it will be seen that nothing but the upper sheet 20 (viz., the non-woven material) touches the skin of the baby. We also provide securing tabs 38 and 39 at one end of each of the side flaps 32 and 33, the tabs being equipped with adhesive which is temporarily covered by means of release strips 40. Thus, when the pleats or folds in the side flaps 32 and 33 are drawn from the bottom of the pad (at the ends thereof) and secured around the babys waist, they tend to snug up the pad against the baby. Leakage around the legs is therefore minimized.

Further, there is far less fluff and wadding needed because of the excellent dispersing qualities of the C-folci, and the fact that the pad itself is relatively small. instead of 2,000 pounds per hour of fluff production and forming for large, overnight diapers, 1,200 pourais is a more realistic figure. For example, instead of a 36 inches long by 12 inches wide fluff pad, the inventive pad can be 13 inches long by inches wide. This results in a saving of 40 percent of fluff and wadding with an increase of the effectiveness in dispersl of solids and liquids.

Apparatus for producing the inventive diaper is seen in FIG. 5. At the extreme left-hand portion of FIG. we provide an unwind mechanism 41 which carries a parent roll of wadding web material providing the previously mentioned wadding web 17. This is conducted over various idler rolls to an overwrap folding unit 42. At this point, the configuration seen in FIG. 6 is developed, which, it will be appreciated, is the blank employed to develop the C-folded pad 10. For that purpose. a fluff unit 43 is provided whichdisintegrates a cellulosic web 44 provided from a parent roll on an unwind 45. The fluff web 46 also enters the overwrap fold mechanism and is enveloped or overwrapped by the wadding web 17. The composite web is advanced through the action of the top and bottom conveyor belts generally designated 47, after which the web configuration or blank seen in FIG. 6 is C-folded by means of the folding device 48 into the configuration seen in FIG. 7.

The continuous C-folded pad is advanced through the nip of a pair of rolls generally designated 49 which serve to compress the continuous web at spaced-apart transverse areas corresponding to the ends of the pads 10 ultimately developed. The pads are developed by virtue of passing through a pad cutoff generally designated 50, wherein one roll is equipped with knives and the other roll equipped with anvils or recesses accommodating the knives so as to sever the C-folded web transversely.

The compressed portions of the web blank can be seen schematically at 51 between the units 49 and 50.

After the operation of the pad cutoff 50 to achieve discrete length pads 10, the pads are supported on a bottom powered conveyor 52 and are advanced by the cooperation of the conveyor 52 with a top conveyor (also equipped with a belt) as at 53. The conveyors 52 and 53 operate at a speed faster than the conveyor 47 (constituting a speed-up conveyor) so as to develop a larger spacing 51a between pads 10 and thus accommodate the greater length webs 20 and 21 (see FIGS. 2 and 3).

An unwind for the moisture impervious web 21 is provided at 54, and a similar unwind 55 is provided for the moisture pervious web 20. The webs 20 and 21 are led through a nip defined by a pair of rolls 56 so as to envelop the pads 10. Prior to the entrance of the web 20 into the nip defined by the ros 56, the side seal adhesive for the seams 22, 23, and 30, 31 is applied by nozzles as at 57. Before the web 21 reaches the nip defined by the rolls S6, transverse lines of adhesive are laid down by a glue printer generally designated 58, which results in the seams 24, 25 and 28, 29.

After leaving the nip defined by the rolls 56, the composite web passes through pull conveyor belts generally designated 59 and which have positioned therein end seal pressure wheels as at 60. Just prior to encountering the pull conveyors 59, the web configuration is as seen in F K]. 8.

As the web in composite form (seen in FIG. 8) issues from the pull conveyors 59, adhesive is applied by means of nozzles 61 to develop the spots 36 and 37 (see FIG. 1). Thereafter the composite web goes through a gusset former to develop the side flaps 32 and 33 (see FIG. 9). this being achieved by the gusset former 62. Thereafter the diaper is equipped with tabs in a tab applicator generally designated 63. the adhesive tape providing the tabs 38 and 39 coming from the unwind 64, while the release strips 40 are provided from the unwind 65. These are transversely severed after uniting by means of a cutoff roll 66. The individual diapers are developed by means ofa diaper cutoff mechanism generally dcsignated 67, after which the individual diapers are advanced through pull belt conveyors generally designated 68 into the nip defined by a pair of folding rolls generally designated 69. From the folding rolls 69, the diapers are automatically stacked in predetermined count units on the leaving conveyor generally designated 70.

We claim:

I. A disposable diaper comprising a generally rectangular pad of soft. moisture-absorbent material, a wad ding web of moisture-absorbent material surrounding the pad, the pad and wadding web being folded into a C-shape along a pair of spaced apart lines to provide an outer pad portion and a pair of inner pad portions superposed on the outer pad portion to form an elongated channel extending parallel to said spaced-apart lines, the inner pad portions and the outer pad portion being of approximately the same thickness, each inner pad portion being separated from the confronting part of the outer pad portion by a double thickness of said wadding web, an enveloping wrap encircling the C folded pad and wadding web and extending across said channel, said enveloping wrap providing side flaps adapted to be unfolded in the direction transverse to the length of said channel and thereafter united at the respective ends thereof and about a baby's waist.

2. The structure of claim l.ir which said enveloping wrap includes a substantially liquid-pervious sheet adjacentsaid inner pad portions and having a width exceeding the width of said C-folded pad, said enveloping wrap also including a substantially liquid-impervious sheet adjacent said outer pad portion and generally coextensive with said liquid-pervious sheet, said sheets being perimetrically united to form said enveloping wrap, said sheets being united along the edges of said C-folded pad to provide side flaps.

3. The structure of claim 2 in which prior to usesaid flaps are folded into positions adjacent said outer pad portion.

4. The structure of claim 3 in which said side flaps are each reverse folded along a line parallel to but spaced from the union at the edge of said C-folded pad.

5. The structure of claim 4 in which each of said side flaps is unitedin the portion thereof between said reverse fold line and the edge of said C-folded pad to a portion of said liquid-impervious sheet, the last mentioned union being located approximately midway of the length of said diaper whereby the ends of said side flaps are free but the intermediate portions are restricted during unfolding.

6. The structure of claim 3 in which ends of said side flaps are equipped with securing tabs.

7. The structure of claim 3 in which said wadding web is a singlesheet having longitudinal edges overlapped within said channel.

8. The structure of claim 1 in which said channel between said inner pad portion is at least about one inch wide.

* i i I i UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Inventor(s) Ernst Daniel N strand and Brian H. McIntosh It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 3, line 51, "ros" should be rolls Column 4, line 3I before "generally" insert mechanism Signed and sealed this 1st day of October 1974.

(SEAL) Attest:

MCCOY M. GIBSON JR. 0. MARSHALL DANN Attesting Officer Commissioner of Patents

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3900031 *Aug 22, 1974Aug 19, 1975Kimberly Clark CoDisposable diaper with reinforced waistband and tape attachment means
US3920017 *Sep 27, 1974Nov 18, 1975Colgate Palmolive CoCrotch-shaped diaper and method
US3995640 *Jan 5, 1976Dec 7, 1976Colgate-Palmolive CompanyDiaper with elastic means
US4094319 *Nov 1, 1976Jun 13, 1978Joa Curt GSanitary pad with multiple end folds
US4496359 *Mar 19, 1982Jan 29, 1985Beghin-Say S.A.Sanitary articles to absorb body liquids
US4731071 *Nov 6, 1984Mar 15, 1988Beghin-Say S.A.Liquid-absorbent disposable article
US4781711 *Aug 28, 1987Nov 1, 1988The Procter & Gamble CompanyAbsorbent article having moisture insensitive resilient shaping members
US4787896 *Aug 18, 1987Nov 29, 1988The Procter & Gamble CompanyAbsorbent article having liquid impervious shelves
US5007906 *Oct 27, 1989Apr 16, 1991The Procter & Gamble CompanyDecoupled sanitary napkin
US5324278 *May 28, 1992Jun 28, 1994The Procter & Gamble CompanySanitary napkin having components capable of separation in use
US5674214 *Nov 9, 1995Oct 7, 1997The Procter & Gamble CompanySanitary napkin having components capable of separation in use
US5688258 *Jul 20, 1995Nov 18, 1997The Procter & Gamble CompanyDisposable cover for an absorbent materials
US5733274 *Sep 10, 1996Mar 31, 1998The Procter & Gamble CompanySanitary napkin having stiffened center
US6102892 *Jul 2, 1997Aug 15, 2000Kimberly-Clark Worldwide, Inc.Diaper with pleats for containment of liquid and solid waste
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
US7377914Jun 30, 2005May 27, 2008The Procter & Gamble CompanyDisposable absorbent article having backsheet strips
US7591809 *Feb 28, 2005Sep 22, 2009Uni-Charm CorporationSanitary absorptive article producing device and method
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
US7931636Aug 4, 2005Apr 26, 2011The Procter & Gamble CompanySimple disposable absorbent article
US8148598Feb 22, 2006Apr 3, 2012Dsg Technology Holdings LimitedMethod of making an absorbent composite and absorbent articles employing the same
US8187239May 31, 2005May 29, 2012The Procter & Gamble CompanySide notched folded diaper
US8201607Jul 2, 2009Jun 19, 2012Uni-Charm CorporationSanitary absorptive article producing device and method
US8257335Jan 31, 2007Sep 4, 2012The Procter & Gamble CompanyDiaper having hip stretch panels
US8585672Feb 28, 2007Nov 19, 2013The Procter & Gamble CompanyDisposable absorbent article having deployable belt ears
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
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EP0425026A2 *Oct 18, 1990May 2, 1991THE PROCTER & GAMBLE COMPANYDecoupled sanitary napkin
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Classifications
U.S. Classification604/390, 604/365, 604/370, 604/385.201
International ClassificationA61F13/56, A61F13/15
Cooperative ClassificationA61F13/58, A61F13/15634, A61F13/537, A61F2013/15821, A61F2013/53786, A61F13/53418, A61F2013/530131, A61F2013/51409, A61F13/53409, A61F2013/53445, A61F2013/586, A61F13/534, A61F2013/49076
European ClassificationA61F13/534B2, A61F13/15M3C