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Publication numberUS2864362 A
Publication typeGrant
Publication date16 Dec 1958
Filing date1 Dec 1953
Priority date1 Dec 1953
Publication numberUS 2864362 A, US 2864362A, US-A-2864362, US2864362 A, US2864362A
InventorsWilliam A Hermanson, Gerald I Hermanson
Original AssigneeWilliam A Hermanson, Gerald I Hermanson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mouldable absorbent material
US 2864362 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 16, 1958 w. A. HERMANSON ETAL 5 5 MOULDABLE ABSORBENT MATERIAL Filed Dec. 1, 1953 INVENTORS William Al /m BY Gerald I.//cm1arzsan {K /4M My 4; M

Unite States Patent 2,864,362 MOULDABLE ABSORBENT MATERIA William A. Hermanson, Brookline, and Gerald L Hermanson, Newton, Mass.

Application December 1, 1953, Serial No. 395,476

Claims. (Cl. 128-156) The present invention relates to. a multiple ply moulded web and more particularly to an absorbent moulded integrated web adapted for use as a bandage or dressing.

In many medical and surgical conditions, it is desirable to have an absorbent dressing shaped or moulded to a particular part of the body, designed to absorb secretions from the body over a period of time. The ordinary bandages or dressings are flat or are not particularly designed for application to concave or convex portions of the body, such as the heel, nose, elbow or shoulders. Further those dressings which are ordinarily used and which do have a degree of absorbency as for example, cotton wadding or batting very often are undesirable because their fibers are often absorbed by the wound which causes infection or discomfort.

It is an object of the present invention to provide a dressing particularly shaped for use on concave or convex portions of the body which is both highly absorbent and which will not lose its shape over a period of time.

lt is further an object of this invention to provide a dressing in which the portion of the dressing in contact with the body has a relatively smooth finished surface with little tendency for its fibers to be absorbed into the wounds.

It is further an object of this invention to provide a dressing which has a high degree of fluid capacity and latent water absorbency for absorption.

In this invention, three plies are secured together forming the dressing. An inner web or web normally close to the body is a permeable porous absorbent wet strength sheet. Although the inner web described herein is preferably a paper web, other thin non Woven webs may also be utilized. The center or middle web, which is secured to the inner web by thermo-pla'stic means, comprises multiple plies of absorbent creped fibers having no wet strength and which are held together preferably by embossing.

The outer sheet of material is a latex impregnated paper formation with sufficient latex impregnation to render this sheet latently water absorbent, and which when moulded by die means, will retain the shape in which is has been formed under normal conditions. This outer layer of material is held to the center layers by cementitious means. 1

The particular construction of this invention as well as other objects and advantages will be more clearly understood when considered in connection with the accompanying drawings in which:

Figure 1 is an enlarged cross sectional view of. a portion of the dressing.

Figure 2 is an elevational view of one form of the invention.

Figure 3 is an elevational view of a modification of the invention.

Referring particularly to the drawing of Figure 1, it will be noted that there is provided three types of webbing material; an inner web 1 of cellulosic fibers or synthetic fibers such as wood pulp, vegetable or rayon, normally adapted to contact the surface of the body, a center web 2 comprising multiple plies of sulphite or sulphate paper formation and an outer heavier covering web 3 of an elastomeric latex impregnated paper formation of cellulosic fibers. The inner web 1 may be made of any cellulosic or synthetic fiber, provided it is formed with a relatively smooth finished outer surface and has a substantial degree of softness. This inner cellulosic web should also have wet strength and a high rate of permeability, but at the same time to maintain the wet strength of this web, it is preferable to provide a web of long fibers in which relatively little wet strength resin need be added. The use of a chemical material in a cellulosic web of long fibers, particularly rayon cellulose, imparts a relatively smooth texture to the surface of the web, while at the same time maintaining a substantial softness of the material. In such a construction, the inner layer of web material is relatively smooth and, therefore, unlikely to permit fibers from the web to be absorbed into the wound and is also quite permeable to liquids or dispersions emitted from the wound. Because of its long fiber structure and wet strength, it will maintain its body and not disintegrate.

The web 2 is secured to the lower side of the web 1 by suitable means such as pressure sealing and heat sealing with a thermoplastic resin or fibers 4 which may be deposited on the lower side of the web 1. The web 2 comprises multiple plies of absorbent creped sulphite or sulphate paper formations which are designed to absorb relatively large amounts of liquid material, but which are somewhat less permeable than the web 1. This web 2, however, has no wet strength at all and is, therefore, a great deal softer and more absorbent than the web 1. The amount of absorbency as well as the amount of resiliency of this web may be varied by the amount of creping provided in this web. The combination of multiple plies and their ereping makes this center web a great deal thicker than the web 1. This factor substantially increases the absorbency of the web, but somewhat reduces the rate of permeability of this web as compared with web 1. Thus when organic particles pass quickly through the web 1 into the web 2, they are subjected to more mechanical action upon them. Each of these organic particles if they are in a dispersion will coagulate as they pass through these multiple layers. This reduces the amount of liquid reaching the outer web 3. The amount of liquid, therefore,

absorbed by the web 2 may be varied substantially by changing the number of plies and the degree of creping of these plies.

It is preferable to have three or more of these plies in the web 2. These multiple plies are held together by suitable means preferably embossing. The third web 3 constituting the layer furthest away from the part of the body which the dressing is designed to cover, is secured to the web 2 by cementitious or other suitable means. This third web is an elastomeric latex impregnated formation of cellulosic fibers having a suflicient percentage of latex retained after impregnation and coagulation to render the web latently water absorbent.

It has been found that a web impregnated with approximately 40 to 60 percent of its weight with latex is suitable. This web has a substantially more compact formation than either the multiple plies of web 2 attached to its face or the inner web attached to the multiple plies of web 2. The latex contained in this web permits ab sorption very slowly through its strata of fibers. This third web may if desired, be coated with a moisture repellent coating or moisture proof plastic film in order to prevent any body secretions from passing through it. Those body secretions which do pass through the web 2 to the web 3 are partially coagulated as described above and, therefore, do not flow through this outer web very readily.

The heavy density of this web together with the latex impregnation provides a substantial latent water absorbency to this web 3 without any additional means. This latent water absorbency substantially increases the amount of liquid which may be held in the web 3. The latex contained Within this Web 3 acts to permit the web to be formed in concave (see Figure 3) or convex (see Figure 2) shapes which will not be distorted under ordinary conditions. By subjecting the three webs to the action of a male and female die of a desired concave or convex shape, a substantially permanent moulded dressing will be formed. The concave or convex curvature which may be formed in this manner may be as deep as 1 /1 inches on a radius from the plane of the opening to the center of the depression. In forming these concave or convex shapes, if desired, the three webs may be subjected to the action of the forming die before they are joined one to the other. In this manner, there will be less distortion between the three webs because of the difference in area of each of the webs formed in the depressed section. In the event that the pad is moulded before the three webs are secured together, they may if desired, be secured one to the other by crimping the side edges, by embossing or by other suitable means.

Having now described our invention, we claim:

1. A medical dressing of material comprising a porous inner paper web having \vet strength. permeability and absorptivity, and adapted to lie over a wound, a center web of multiple plies of absorbent, permeable creped paper material, and a covering web of elastomeric latex impregnated paper material lateutly water absorbent in nature, and means securing said webs together.

2. A medical dressing of paper material comprising a porous inner cellulosic Web having wet strength, permeability. absorptivity and a smooth finished surface adapted to lie over a wound, a center web of multiple plies of absorbent, permeable, creped paper material, and a covering web of elastomeric latex impregnated paper 4, material latently water absorbent in nature and means securing said webs together.

3. A medical dressing comprising a combination of paper webs having a surfacing cellulosic web of porous, permeable, absorbent, wet strength properties, a center Web of absorbent creped paper sheets heat sealed to said cellulosic web, a mouldable elastomeric latex impregnated Web, and means securing said impregnated web to said center web.

4. A medical dressing comprising a porous inner cellulosic web having porous, permeable wet strength properties, a center web of multiple plies of creped material slightly less permeable but having more absorptivity than said cellulosic web, a covering web of elastomeric latex 15 impregnated material less permeable than said center web,

and means securing said webs together.

5. A contoured paper medical dressing comprising an outer mouldable elastomeric latex impregnated web adapted to assume a contour to which the entire dressing conforms, a center web fitting into the elastomeric web of absorbent creped paper sheets bonded to said clastomeric web and a surfacing cellulosic web of porous, permeable, absorbent, wet strength properties and means securing said surfacing web to said center web.

References Cited in the file of this patent UNITED STATES PATENTS 1,930,114 Straus Oct. 10, 1933 no 1,979,899 OBrien Nov. 6, 1934 2,019,842 Bussing Nov. 5, 1935 2,190,378 Hinkamp Feb. 13, 1940 2,344,021 Bouziane Mar. 14, 1944 2,682,873 Evans et al. July 6, 1954 35 FOREIGN PATENTS 101,404 Australia June 21, 1937 OTHER REFERENCES Johnson 8: Johnson Catalog and Service Book, Eighth 40 Edition, copyright 1951, page 32.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1930114 *12 Aug 193110 Oct 1933Diapex CorpDiaper
US1979899 *25 Aug 19326 Nov 1934Robert J O'brienDiaper and the like
US2019842 *26 Jun 19355 Nov 1935James G BussingChild's diaper
US2190378 *13 Jul 193613 Feb 1940Gen Bandages IncGauze bandage
US2344021 *5 Sep 194214 Mar 1944George BouzianeSurgical bandage
US2682873 *30 Jul 19526 Jul 1954Johnson & JohnsonGeneral purpose protective dressing
AU101404B * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3067747 *4 Sep 195911 Dec 1962Kimberly Clark CoCellulosic product
US3425060 *25 Jan 19654 Feb 1969Little Inc AProtective garment
US4555811 *13 Jun 19843 Dec 1985ChicopeeExtensible microfine fiber laminate
US4669460 *7 Apr 19862 Jun 1987Silber Arthur LAnti-ulceration bandage
US4875492 *5 May 198824 Oct 1989Mitchell Debra JWashable and contoured nursing pads
US5830170 *19 Mar 19973 Nov 1998Whiteman; Phillip L.Multiple-use blood-blotting device
US5895381 *3 Jan 199720 Apr 1999The Procter & Gamble CompanyAbsorbent interlabial device with flexible extensions
US5961509 *19 Dec 19955 Oct 1999Sca Hygiene Products AbShaped absorbent article and method of manufacturing the same
US5964689 *20 Nov 199712 Oct 1999The Procter & Gamble CompanyMethod of making an absorbent interlabial device with a central groove
US5968026 *14 Nov 199719 Oct 1999The Procter & Gamble CompanyAbsorbent interlabial device
US6033391 *21 May 19987 Mar 2000The Procter & Gamble CompanyToilet-disposable absorbent interlabial device
US6123693 *30 Jul 199826 Sep 2000The Procter & Gamble CompanyAbsorbent interlabial device with flexible extensions
US61834561 May 19986 Feb 2001The Procter & Gamble CompanyFeminine hygiene system and kit using an absorbent interlabial device
US635502211 Mar 199912 Mar 2002The Procter & Gamble CompanyAbsorbent interlabial device with substance thereon for maintaining the device in position
US64097135 Jun 199725 Jun 2002The Procter & Gamble CompanyEmollient-treated absorbent interlabial application
US670279626 Mar 20019 Mar 2004The Procter & Gamble CompanyAbsorbent interlabial device having an improved tab
US671622918 Dec 20006 Apr 2004Joseph TothHemorrhoid relief and anal hygiene device
Classifications
U.S. Classification604/385.1, 602/42, 604/375, 604/366, 604/373
International ClassificationA61F13/00, A61F13/15
Cooperative ClassificationA61F13/00034, A61F13/00021, A61F2013/53445
European ClassificationA61F13/00