Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2916037 A
Publication typeGrant
Publication dateDec 8, 1959
Filing dateNov 19, 1956
Priority dateNov 19, 1956
Publication numberUS 2916037 A, US 2916037A, US-A-2916037, US2916037 A, US2916037A
InventorsGeorge C Hansen
Original AssigneeGeorge C Hansen
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Disposable diaper
US 2916037 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Dec. 8, 1959 G. c. HANSEN DISPOSABLE DIAPER Filed Nov. 19, 1956 IN V EN TOR.

650865 6! H)? ,vs EM BY M024. MEN 4-411 Arraensv:

Statcs Patent ill Application November 19, 1956, Serial No. 622,869

2 Claims. (Cl. 128-284) This invention relates to a disposable diaper.

. vInits preferred embodiment as herein disclosed, the daiper con'lpr'isesfan inner pad of partly refined pulp which' h'as been stabilized by spraying with adhesive. The stabilization of a pulp pad in this manner is not herein claimed, comprising the subject matter of a separate application. v

The partial refinement of the pulp has to do with the degree to which its fibers have been separated. In the original .wood, the fibers are, of course, bonded together. In the pumping operation, the fibers are torn apart and the bonding agent present in the growing timber is eliminated. Nevertheless, considerable adhesion between individual fibers remains and in the refining operations these are mechanically separated by known procedures. The; present: invention requires that the refining operation; be stopped at an intermediate point. If the refining is-insufficient, the pulp will be coarse and harsh to the touch. If the refining is carried to a maximum degree, the fibers will not only be separated but broken up to such a point that the resulting pulp pad will have the action of a wick and tend to disseminate rather than to retain the liquids it is designed to catch and hold.

The refined pulp is formed into a batt by procedures forming no part of the present invention and this batt is first sprayed wtih a sizing adhesive and is then laminated to backing and facing plies, both of which are porous or absorbent, the preferred difference lying in the fact that the facing ply is desirably a non-woven fabric and the backing ply a porous wet strength paper. One or more plies of absorbent paper may be placed between the basic facing ply and the pulp pad to eifect dispersion of liquids and to render the pad softer by preventing pulp fibers from protruding through the facing ply. A wide variety of adhesives may be used for sizing, including dextrin, starch, resin or latex in any liquid vehicle suspension. The amount of dilute adhesive used may vary from one to five grams per diaper of seven inches by sixteen inches and the degree of concentration is indicated by the fact that this will ordinarily represent a raneg of seven-tenths of a gram to 1.5 grams of adhesive solids per diaper. Products of other dimensions would, of course, be treated proportionately.

In the assembly of the product, the facing web and the web or webs of underlying tissue, if any, are fed beneath the advancing web of pulp, one or both surfaces of which have been freshly sprayed with sizing. The rear face of the web of pulp is always sized. When the front face of the pulp web is sized, underlying tissues will always be employed. The facing web is made materially wider than the web of sized pulp and the margins of the facing web are turned over onto the exposed face of the pulp and subjected to the action of gluing rolls after which the backing web is applied and subjected to pressure to bond it securely to the inturned margins of the facing web.

Finally, the resulting laminated web is cut into individual diaper lengths and the end margins of the individual diapers are subjected to heavy sealing pressure. Undoubtedly, the seal is partially attributable to the still adhesive surfaces of the fiber of the pad, but it is believed that the embossing pressure exerted thereon is primarily responsible for closing the ends of the diaper and interlocking the fibers of the pad with each other and with the backing and facing sheets. It is considered very desirable that the pulp'extend to the end of the pad to intervene between the facing and backing sheets at all points, clear to the ends of the diaper.

In use, the diaper is desirably held to the childs body by some means other than itself. It can, for example, be supported by a conventional cloth diaper. Desirably, the diaper of the present invention is used as an insert in a specially designed, moisture-proof garment which is here illustrated but is not claimed herein, since it forms the subject matter of another application.

In the drawings:

Fig. 1 is a view in perspective of a complete diaper embodying the present invention, portions thereof being broken away to expose interior plies.

Fig. 2 is a view in cross section through the diaper shown in Fig. 1.

Fig. 3 is an enlarged fragmentary detail view of an end portion of the diaper in inverted plan.

Fig. 4 is a detail view on a further enlarged scale taken on line 4-4 of Fig. 3.

Fig. 5 is a view in perspective showing the diaper of the present invention introduced into the garment for purposes of application to a child.

Fig. 6 is a diagrammatic view in longitudinal section showing, merely by may of exemplification, a series of procedural steps in the production of the diaper of the present invention.

As already indicated, the preferred practice involves use of a non-woven fabric for the facing ply 1 which represents the top surface of my improved diaper. Beneath this there is optionally incorporated one or more plies 2 of absorbent paper tissue of the grade of facial tissue or the like.

The center of the diaper comprises a pad 3 of partially refined pulp stabilized or bonded by minute quantities of adhesive which connect its fibers at innumerable points, the adhesive being used so sparingly that it does not stiffen the pulp pad.

The bottom of the pad comprises a backing ply 4 of paper of high wet strength but nevertheless porous. The diaper is made relatively thin. For some babies, a single diaper of this weight is ample. However, it is an important feature of the present diaper that the backing sheet as well as the facing sheet be porous and permeable so that, when a plurality of diapers are used simultaneously, liquid will pass from one to another to neutralize the absorbent capacity of them all.

The width of the facing ply 1 preferably exceeds the,

Width of the pulp pad 3 sufficiently to permit the side margins 5 of the facing ply to be turned over the edges of the pad and to receive bonded connection with the backing ply 4 which is held thereto by an intervening strip of adhesive shown at 6 in Fig. 2.

The pulp pad 3 projects to the end of the diaper as shown at 7 in Fig. 4. At its ends, the diaper is of considerably reduced thickness by reason of embossing 8 (Fig. 3) which actually unites the fibers, as is well known in the paper converting field. The adhesive size with which the fibers of the pad 3 have been sprayed will bond the backing ply 4 to pad 3 and will also assist in closing the ends. When sizing is sprayed on the front of the batt, it will bond the pad 3 to the tissue. The intermittent and/or adhesive connection of the several plies as a result of the embossing operation at the ends of the diaper desirably stiffens these ends, this being advantageous in holding the diaper securely inposi-tion in such a a gannent asthat'shown' in Fig. 5.

""In' use, the end'porti'ons' of the resulting diaper, ge-' nerically designated by reference character 10 in Fig. 5, are inserted-beneath,the. overhanging web portions 11 of al garment lz which has'las'tic' sid nap'satziataad 14' and glove fasteners or .other'connecting inea iislwhereiby. the 7 side flaps may be connected toie achlother and to the upwardly'folded endporti'ns 15." ,Eurth eii 'dfltails' of; this garment are ,notrequired, 'sincegit jfiorrns no; part bftjhelpresentinvention'j It is de'sire'dto'nQteZOHIY that it. is desirably made oflwaterproof but'fflexible'ln'iaterial and has a largeopening 16 through which most of the upper surface of the diaper is exposed toIreceiye bodily excretions from the child wearing the garment.

Thefidiaperisusufliciently flexible] sotthatl jti is ,readily 'manipulated into place-through this opening and iswithdrawable with equal facility for disposal. The, stiffness l. tweb: Zahare turned bytgonyentionaliiorniers indie about the edges of the pulp in the manner already dis- 7 sure of sealing rolls 32 and 33.-

t fabric facing ply overlying the'fro'nffa'ce of thebattand ,of the embossed diaper ends helps torhlold thefdiape'r'tflat t and in place. a The entire diaper isdesir'ab-ly made of pad and tissue materials capable of disintegrationin water to the diagrammatic disclosure in this view is solelyby way of exemplification. It does not represent. the only'way in which the diaper can be manufactured. X

From the parent roll 18 of pulp, the pulp web..19 passes betweentupper and lower'spray 'ndzzles20;and 21, nozzle 20 spraying adhesive sizing upon thefupper surface of web 19 (as viewed in Figure 6) and, if:desired, nozzle 21 spraying adhesive'sizigg on:the.. lower surface. r t v V Beneath the path of .the' pulp webt are supply rolls 22 and 23 from which the webs 24 of top/facing material a p p 7 n p and.,25 .oftissue materialpass into lamination .wit-h'the As shown at 34 and 35, conventional cutting and embossing dies sever the individual diapers and seal their l ends in the manner above'idesci'ib'ed.

1. A multi-ply'diaperfor use as aninsert in a garment diaper holder ctimprisinghbattbf paztially frefined pulp, the back of rsaidt b l bsin si ssl RQB rpm-wov n having marginsoverturnedzpntolnthehacl of the batt, a

porous wet strength paper backing ply secured to the batt;

by the said sizing and adhesively secured to the margins of the facing ply, said batt extending to both ends of the diaper dcthe-en vqi t aperrbsia cl stifi- .c ne -by b in Q QP SQ -f a 2 m t -p y di pe fqrfus fas riserd 'ape ho d r c mpris ng a but at Pat a the b clsof sa d-b it ie n fiize pawns ab f ng p ytQ erllip et cntlf s fj having margins overturned onto the ba'clg' po w strength Pap r l ls u nly seen w h: d z n ian esi e Yurjeid to a a th a n p y, i tbat e ten 11 toiboth'e lc g diaperand th end ft e perbq n closed-a ened by embossing. V V

4 References Cited in the' fil'e of fthis patent I UNITED STATES PATENTS. r t

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1336402 *May 31, 1918Apr 6, 1920CTories
US2783474 *Jun 22, 1954Mar 5, 1957American Felt CompanyFibrous and absorbent perspiration pads
US2788003 *Jun 6, 1955Apr 9, 1957Chicopee Mfg CorpDisposable absorbent pad
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3036573 *Apr 10, 1957May 29, 1962Kimberly Clark CoCellulosic product
US3156242 *Mar 29, 1962Nov 10, 1964Johnson & JohnsonFlexible absorbent sheet
US3211147 *Nov 1, 1962Oct 12, 1965Int Paper CanadaDisposable diaper pad
US3295526 *Oct 21, 1964Jan 3, 1967Lois E SabeeDisposable diapers and the like
US3407103 *Jul 26, 1965Oct 22, 1968Int Paper CanadaMethod of forming a disposable diaper pad
US3510587 *Mar 8, 1966May 5, 1970Colgate Palmolive CoDisposable diaper
US3563242 *Jan 25, 1968Feb 16, 1971Bengt HedstromDiaper
US3658064 *Jan 21, 1971Apr 25, 1972Scott Paper CoDisposable diapers and supporting garment therefor
US3661680 *Mar 9, 1970May 9, 1972Riegel Textile CorpApparatus for successively forming disposable diapers
US3888254 *Feb 11, 1974Jun 10, 1975Laurel A HendricksSanitary napkin
US3900032 *Feb 6, 1974Aug 19, 1975Olof Torgny HeurlenHolder for absorbent pads, such as infants napkins
US4041951 *Mar 2, 1976Aug 16, 1977The Procter & Gamble CompanyAbsorptive structure having improved surface dryness and improved resistance to rewetting in-use
US4176667 *Oct 25, 1977Dec 4, 1979Adult Care Products, Inc.Disposable liquid absorbent pad and method
US4417894 *Mar 11, 1982Nov 29, 1983Norris Kenneth ETowelsheet disposable diaper
US4695278 *Oct 11, 1985Sep 22, 1987The Procter & Gamble CompanyAbsorbent article having dual cuffs
US4738677 *Oct 10, 1986Apr 19, 1988The Procter & Gamble CompanyAbsorbent article having a containment pocket
US4795454 *Oct 30, 1987Jan 3, 1989The Procter & Gamble CompanyAbsorbent article having leakage-resistant dual cuffs
US4816025 *Oct 30, 1987Mar 28, 1989The Procter & Gamble CompanyAbsorbent article having a containment pocket
US4920960 *Oct 2, 1987May 1, 1990Tecnol, Inc.Body fluids barrier mask
US4938755 *Nov 15, 1988Jul 3, 1990The Procter & Gamble CompanyAbsorbent article having a containment pocket
US4941470 *Jan 11, 1988Jul 17, 1990Tecnol, Inc.Face mask with ear loops and method for forming
US4969457 *Sep 29, 1989Nov 13, 1990Tecnol, Inc.Low density polyethylene layer; gas flow; aids prevention
US5021051 *Apr 6, 1989Jun 4, 1991The Procter & Gamble CompanyDisposable absorbent article having improved barrier leg cuffs
US5413570 *Apr 4, 1994May 9, 1995Kimberly-Clark CorporationDiapers with elasticized side pockets
US5415644 *Feb 13, 1989May 16, 1995Kimberly-Clark CorporationDiapers with elasticized side pockets
US5466232 *Nov 20, 1992Nov 14, 1995Johnson & Johnson Inc.Unitized sanitary napkin
US5582606 *May 23, 1995Dec 10, 1996Kimberly-Clarke CorporationAbsorbent article having dual barrier means
US5599338 *May 9, 1995Feb 4, 1997Kimberly-Clark CorporationDiapers with elasticized side pockets
US5601544 *Dec 23, 1993Feb 11, 1997Kimberly-Clark CorporationChild's training pant with elasticized shaped absorbent and method of making the same
US5694925 *Dec 12, 1995Dec 9, 1997Tecnol Medical Products, Inc.Face mask with enhanced seal and method
US5699792 *Oct 9, 1996Dec 23, 1997Tecnol Medical Products, Inc.Face mask with enhanced facial seal
US5704349 *Oct 21, 1994Jan 6, 1998Tecnol Medical Products, Inc.Surgical face mask with darkened glare-reducing strip and visor
US5797894 *Oct 11, 1994Aug 25, 1998Johnson & Johnson, Inc.Unitized sanitary napkin
US5895382 *Apr 26, 1993Apr 20, 1999Kimberly-Clark Worldwide, Inc.Foreshortened containment flaps in a disposable absorbent article
DE2556501A1 *Dec 16, 1975Jul 1, 1976Procter & GambleSaugfaehige einrichtung
DE2708491A1 *Feb 26, 1977Sep 15, 1977Procter & GambleSaugfaehige gebilde
EP0688548A1 *Jun 22, 1994Dec 27, 1995THE PROCTER & GAMBLE COMPANYCrimping of a fibrous web to a tissue
Classifications
U.S. Classification604/365, 604/375
International ClassificationA61F13/15
Cooperative ClassificationA61F13/539, A61F13/533, A61F13/535, A61F13/505
European ClassificationA61F13/533, A61F13/539, A61F13/535, A61F13/505