|Número de publicación||US3292619 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||20 Dic 1966|
|Fecha de presentación||6 Dic 1963|
|Fecha de prioridad||6 Dic 1963|
|Número de publicación||US 3292619 A, US 3292619A, US-A-3292619, US3292619 A, US3292619A|
|Inventores||Vernon C Egler|
|Cesionario original||Kendall & Co|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (4), Citada por (71), Clasificaciones (17)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
Dec. 20, 1966 v, E L R 3,292,619
ABSORBENT DRESSING Filed Dec. 6, 1963 v INVENTOR.
United States Patent setts Filed Dec. 6, 1963, Ser. No. 328,553 3 Claims. (Cl. 128-156) This invention relates to absorbent dressings, particularly to non-adherent wound dressings, and to a method of making same.
Undoubtedly the most meritorious advance in wound dressings in recent years is the invention in non-adherent dressings by W. B. Dockstader and L. A. Thoennes as disclosed and claimed in US. Patent 2,923,298. The growing widespread acceptance by the medical profession and the general public of these dressings testifies to the utility and effectiveness as non-adherent dressings that minimize or eliminate scar formation in a variety of types of body wounds such as cuts, skin punctures, abrasions and burns. As to be expected, the introduction of the dressings on the market was followed with a flurry of activity by others directed to non-adherent dressing structures. These included special openings such as curvilinear slits and arrangement thereof in the film covering of the dressing; embossed pads covered with a flat monoplanar perforated film; and spacers of apertured fabrics between the main body of absorbent material and the perforated film arranged with the apertures thereof in register with the perforations in the film. Examples of these modifications may be found in US. Patents 2,877,765, 2,896,618, and 3,077,882.
This invention is directed to a non-adherent dressing in which only portions of the surface on the body side thereof are in contact with the body when applied to cover a wound therein. In accordance with this invention the surface of sites of fiuid intake in the dressing is spaced from the surface of the body. Preferably, only a minor portion of the total surface area of the body-side of the dressing is in contact with the body. The body-side of a dressing is, of course, the side thereof placed toward the body over the wound. The major sites of fluid intake into the absorbent pad in accordance with this invention are located in depressions in the surface of the body-side of the dressing. The walls of the depressions slope inwardly into the body of the dressing and are lined with a thin film which covers the surface of the pad at the body-side of the dressing. The film lining the walls of the depressions is perforated, each depressed film portion containing a plurality of openings through which fluid exudate of the wound passes for absorption into the absorbent material located at the openings. The size of the openings and the number thereof in the film on the body-side of the dressing required for ready passage of wound exudate therethrough and into the absorbent material are well known and suitable sizes and numbers of openings in the dressings of this invention may be chosen in accordance therewith. Preferably, the size of each opening is such that the open area thereof is equivalent to circular openings having a diameter of from about 0.008 to 0.2 inch. The total open area of the film at least in the portion thereof directly overlying the wound site should be from about 0.25 to 25% of the film area. Moreover, in accordance with this invention a predominantly major portion, if not all, of the open area of the film is located in the film portions lining the walls of the depressions.
FIGS. 1 and 2 are top and cross-sectional, partly perspective, views, respectively, of an absorbent dressing of this invention in which the numeral 1 designates the film covering a pad 2 of absorbent material. The film 1 lines the walls 3 of the generally concave depressions 4 and extends over the raised portions 5 bordering the depressions. In the case of the dressing as shown, each of the depressions 4 is bordered on all sides thereof by continuous raised portions 5. The raised portions 5 need not be continuous, but may be intermittent; for example, channels may traverse portions 5 to interconnect the depressions. The walls 3 of the depressions 4 slope inwardly from the top surface of'the raised portions 5 into the body of the pad 2. The portion of the wall 3 furthermost recessed from the top surface of the dressing (surface of portion 5) is located substantially centrally in the depression 4. This bottom portion of the film is perforated with an opening 6 through which is exposed absorbent material of the pad 2 located directly thereunder. The film lining the sloping portions of the wall 3 is perforated with a plurality of openings 7 usually smaller in size than the bottom opening 6. The openings 7 need not be arranged in any particular pattern in the wall 3 but generally should be distributed throughout the wall surface. The number of holes 7 in each depression may vary from about 3 to 10 or more, depending upon hole size, for rapid take-up of fluid and efficient distribution of the fluid into the pad 2. The film 1 is adhered to the pad 2 at least at the peripheral edges of the openings 6 and 7. Adherence at these edges keeps the portions of the pad 2 at these openings at the plane of the openings readily available for absorbing fluid entering the depressions. Thus, the absorbent material in and at the openings helps to overcome any resistance a fluid may have in passing into the openings 6 and 7. Adherenoe at these edges between the pad and film also helps to maintain the walls 3 depressed, recessed from a plane common to the top surface of portions 5 of the film. Positive and maximum retention of the depressions is possible in accordance with this invention by lamination of the film to the pad substantially throughout the interface between the film and pad.
A one-stage process for the manufacture of dressings in which the film covering is laminated to the pad while forming the depressions in the covered surface of the'pad and also forming openings in the film portions lining the depressions is schematically illustrated in FIG. 3. Briefly, a flexible imperforate film 1 is placed upon a pad 2 of absorbent material and the composite thereof is passed through a nip between the surfaces 12 of the bosses 11 on the pattern roll 10 and the smooth surface of roll 14. The rolls 10 and 14 are urged together (by means not shown) with suflicient force to compress the portion of film 1 and underlying portion of pad 2 at the aforedescribed nip to form the depressions 4 in the film covered surface of the pad. The bosses 11 are heated, for example by an electric heater coil in the body of pattern roll 10, to a temperature sufficient to soften the depressed portions of the plastic film 1 and conform to and line the walls of the depressions simultaneously made in the pad 2. The smooth roll 14 is also heated, preferably to a temperature less than that of the pattern roll 10. When the boss 11 initially contacts the fihn and begins to depress it there is sufficient heat transfer through the film to the body of the absorbent material to prevent melting of the film. As the boss 11 travels downwardly, as viewed in FIG. 3, a point is reached at which the film at the base of the depression melts and forms an opening 6. The molten portion at the peripheral edge of the opening 6 becomes attached to the absorbent material of the pad 2 directly underlying the edge of the opening. Smaller openings are formed in the sloping wall portions of the film, such as shown at 7 in the walls 3 in FIGS. 1 and 2. These openings also are laminated to the absorbent material along their peripheral edges as in the case of the 3 larger openings 6.
The temperature of the two rolls and the temperature differential necessary to produce the dressings of this invention are dependent on a number of factors, including, of course, the softening and melting points of the thermoplastic film, the nature of the absorbent material, the pressure exerted at the nip of the two rolls and the rate at which the dressing is passed through the nip. This is illustrated in the following example.
A dressing was prepared having approximately 375 depressions per square inch of fihn-covered surface of the dressing. The apparatus employed to make the dressing was a pattern roll containing four-sided bosses approximately 0.017 inch high, the top surface (12, in the drawings) having roughly a parallelogram configuration measuring about 0.025 inch by 0.015 inch. The bosses were arranged in rows across the width of the roll, the bosses in each row being offset from the bosses in the next adjacent rows to present a staggered boss pattern. The rolls were independently heated, the pattern roll to a temperature of about 250 F. to 260 F. and the smooth roll to a temperature of about 150 F. to 175' F.
A low density polyethylene film about 0.001 inch thick was placed upon a strip of non-woven cotton fabric approximately 0.07 inch in thickness. The composite of the film and non-woven fabric was passed through the nip between the pattern roll and smooth roll with the film toward the pattern roll, as shown in FIG. 3. The pressure between the two rolls was about 48 pounds per inch of roll length. The pad and film were passed through the nip at a speed of three yards per minute.
Dressings of appropriate size were cut from the processed strip and tested as such on animals. The dressings functioned well as non-adherent wound dressings. Surprisingly, fluid taken into the pad over a restricted area spread rapidly and widely to portions of the absorbent pad well removed from the area of intake on the pad. For example, a droplet of colored water about A inch in diameter placed upon the body-side of the dressing produced as described above was absorbed into the pad through the openings in about two to three adjacent depressions. The colored water rapidly spread radially from the intake site to an area approximately one inch in diameter.
Films suitable for use in the dressings of this invention are thermoplastic films such as polyethylene films, vinyl chloride-vinyl acetate films, vinyl chloride-vinylidene chloride films, and polyester films to name a few. The films must be water insoluble, thin and flexible. The pad may be any absorbent material suitable for use as a wound dressing.
terials such as cotton fibers, fluff and the like.
The invention claimed is:
1. An absorbent dressing comprising a pad of absorb:
prises depressed portions and raised portions bordering the depressed portions, said depressions having walls which slope inwardly into the body of said pad from the raised portions bordering said depressions, said film con-' forming to and lining the walls of said depressions, the portions of the film lining the walls of the depressions having a plurality of openings therein exposing absorbent material therethrough, said fil-m being adhered to absor-bent material at least at the peripheral edges of said openings.
2. An absorbent dressing comprising a pad of absorbent material having a surface thereof covered with a film of thermoplastic material to provide a front surface of said dressing for application to a wound, said front surface having depressions therein whereby said surface comprises depressed portions and raised portions bordering the depressed portions, said depressions having walls which slope inwardly into the body of said pad from the raised portions bordering said depressions, said film conforming to and lining the walls of said depressions, the portions of the film lining the Walls of the depressions having a plurality of openings therein exposing absorbent material therethrough, said film being adhered to absorbent material at least at the peripheral edges of said openings, each of the film portions at the bottom of the depressions having an opening therein larger than the openings in the sloping wall portions thereof.
3. An absorbent dressing in accordance with claim 1 wherein at least a predominantly major proportion of the total open area of openings in the film is provided by openings in the portions of the film lining said depressions.
References Cited by the Examiner UNITED STATES PATENTS 2,633,442 3/1953 Caldwell l56-2l0 3,053,722 9/1962 Petty 156-210 3,073,304 1/1963 Schaar l28l5 6 3,085,572 4/1963 Blackford 128-156 ADELE M. EAGER, Primary Examiner.
Particularly useful are cellulosic ma- 7
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US2633442 *||8 Mar 1949||31 Mar 1953||Albert E Caldwell||Method of making tufted material|
|US3053722 *||8 Jun 1959||11 Sep 1962||Hudson Engineering Corp||Rib forming method|
|US3073304 *||8 Ago 1960||15 Ene 1963||Kendall & Co||Perforated adhesive tape and bandage formed therewith|
|US3085572 *||6 Oct 1961||16 Abr 1963||Johnson & Johnson||Tape|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3399671 *||1 Feb 1966||3 Sep 1968||Kendall & Co||Spray coated absorbent dressing|
|US3438371 *||2 May 1966||15 Abr 1969||Kendall & Co||Self-adhesive dressing|
|US3446208 *||27 Jun 1966||27 May 1969||Alc Ltd||Porous polyolefin gauze|
|US3481806 *||5 Sep 1967||2 Dic 1969||Huyck Corp||Method of making a bandaging and dressing material|
|US3482570 *||18 Ene 1967||9 Dic 1969||Wolfgang Duffner||Surgical dressing and method of producing the same|
|US3509007 *||18 Mar 1968||28 Abr 1970||Johnson & Johnson||Perforated sheet material|
|US3539433 *||31 Jul 1967||10 Nov 1970||Chrysler Corp||Fabric overlain with interstitially separated segments of thermoplastic material|
|US3566883 *||21 Jun 1967||2 Mar 1971||Hochstadt Adley H||Hairdressing tape|
|US3814101 *||4 Dic 1972||4 Jun 1974||Union Carbide Corp||Disposable absorbent articles|
|US3886941 *||18 Jun 1974||3 Jun 1975||Union Carbide Corp||Diaper insert|
|US3890974 *||18 Jun 1974||24 Jun 1975||Union Carbide Corp||Disposable absorbent article containing slitted hydrogel film|
|US3929135 *||20 Dic 1974||30 Dic 1975||Procter & Gamble||Absorptive structure having tapered capillaries|
|US3967623 *||30 Jun 1975||6 Jul 1976||Johnson & Johnson||Disposable absorbent pad|
|US3989867 *||16 Feb 1973||2 Nov 1976||The Procter & Gamble Company||Absorptive devices having porous backsheet|
|US4081580 *||25 Ago 1975||28 Mar 1978||Eiji Kato||Paper wrapper for wrapping refrigerated meat|
|US4121960 *||19 Nov 1976||24 Oct 1978||Scott Paper Company||Perforated, embossed film to foam laminates|
|US4280978 *||23 May 1979||28 Jul 1981||Monsanto Company||Process of embossing and perforating thermoplastic film|
|US4591523 *||31 May 1985||27 May 1986||The Procter & Gamble Company||Apertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission|
|US4637819 *||31 May 1985||20 Ene 1987||The Procter & Gamble Company||Macroscopically expanded three-dimensional polymeric web for transmitting both dynamically deposited and statically contacted fluids from one surface to the other|
|US4726976 *||28 Oct 1986||23 Feb 1988||The Kendall Company||Composite substrate|
|US4798604 *||26 Ago 1986||17 Ene 1989||Smith And Nephew Associated Companies P.L.C.||Contoured film|
|US4839216 *||1 Jun 1987||13 Jun 1989||The Procter & Gamble Company||Formed material produced by solid-state formation with a high-pressure liquid stream|
|US5171238 *||16 Mar 1989||15 Dic 1992||The Transzonic Companies||Absorbent pad with fibrous facing sheet|
|US5268213 *||4 Ene 1993||7 Dic 1993||Uni-Charm Corporation||Liquid-permeable topsheet for body fluid absorbent articles|
|US5328450 *||27 Sep 1993||12 Jul 1994||Smith & Nephew Plc||Absorbent devices and precursors therefor|
|US5370764 *||6 Nov 1992||6 Dic 1994||Kimberly-Clark Corporation||Apparatus for making film laminated material|
|US5449340 *||3 Jun 1993||12 Sep 1995||Tollini; Dennis R.||Bandage for replaceable dressing|
|US5480719 *||1 Sep 1994||2 Ene 1996||Tollini; Dennis R.||Securing tape|
|US5580418 *||2 Dic 1994||3 Dic 1996||Kimberly-Clark Corporation||Apparatus for making film laminated material|
|US5591149 *||7 Oct 1992||7 Ene 1997||The Procter & Gamble Company||Absorbent article having meltblown components|
|US5667619 *||22 Mar 1996||16 Sep 1997||Kimberly-Clark Worldwide, Inc.||Method for making a fibrous laminated web|
|US5667625 *||2 Abr 1996||16 Sep 1997||Kimberly-Clark Worldwide, Inc.||Apparatus for forming a fibrous laminated material|
|US5681300 *||27 Nov 1995||28 Oct 1997||The Procter & Gamble Company||Absorbent article having blended absorbent core|
|US5709829 *||8 Jul 1996||20 Ene 1998||Pantex S.R.L.||Method for manufacturing product in membrane or film form|
|US5814389 *||8 Jul 1996||29 Sep 1998||Pantex, S.R.L.||Apertured three-dimensional product in membrane or film form for covering sanitary, disposable absorbent products|
|US5814390 *||30 Jun 1995||29 Sep 1998||Kimberly-Clark Worldwide, Inc.||Creased nonwoven web with stretch and recovery|
|US5817394 *||8 Nov 1993||6 Oct 1998||Kimberly-Clark Corporation||Fibrous laminated web and method and apparatus for making the same and absorbent articles incorporating the same|
|US6004893 *||30 Ago 1996||21 Dic 1999||The Procter & Gamble Company||Shaped sanitary napkin with flaps|
|US6103953 *||31 Jul 1998||15 Ago 2000||The Procter & Gamble Company||Absorbent article having fused layers|
|US6319239||8 May 1998||20 Nov 2001||The Procter & Gamble Company||Absorbent article having improved integrity and acquisition|
|US6603052||25 May 2001||5 Ago 2003||John E. Davis||Fluid absorbent article for surgical use|
|US7102054||4 May 1999||5 Sep 2006||The Procter & Gamble Company||Absorbent article having fused layers|
|US7304202||3 Dic 2003||4 Dic 2007||Ossur Hf||Wound dressing|
|US7381860 *||22 Nov 2006||3 Jun 2008||Hf Ossur||Wound dressing and method for manufacturing the same|
|US7396975||25 Ago 2004||8 Jul 2008||Ossur Hf||Wound dressing and method for manufacturing the same|
|US7411109||3 Dic 2003||12 Ago 2008||Ossur Hf||Method for producing a wound dressing|
|US7423193||3 Dic 2003||9 Sep 2008||Ossur, Hf||Wound dressing|
|US7459598||3 Dic 2003||2 Dic 2008||Ossur, Hf||Wound dressing|
|US7468471||3 Dic 2003||23 Dic 2008||Ossur, Hf||Wound dressing having a facing surface with variable tackiness|
|US7470830||3 Dic 2003||30 Dic 2008||Ossur, Hf||Method for producing a wound dressing|
|US7488864||26 Jun 2007||10 Feb 2009||Ossur Hf||Wound dressing|
|US7531711||25 May 2005||12 May 2009||Ossur Hf||Wound dressing and method for manufacturing the same|
|US7696400||3 Dic 2003||13 Abr 2010||Ossur Hf||Wound dressing|
|US7745682||3 Jul 2008||29 Jun 2010||Ossur Hf||Wound dressing and method for manufacturing the same|
|US7910793||16 Abr 2008||22 Mar 2011||Ossur Hf||Wound dressing|
|US8093445||28 Oct 2008||10 Ene 2012||Ossur Hf||Wound dressing and method for manufacturing the same|
|US8247635||8 Mar 2010||21 Ago 2012||Ossur Hf||Wound dressing|
|US20040127829 *||3 Dic 2003||1 Jul 2004||Sigurjonsson Gudmundur Fertram||Wound dressing|
|US20040127835 *||3 Dic 2003||1 Jul 2004||Sigurjonsson Gudmundur Fertram||Method for producing a wound dressing|
|US20050059918 *||25 Ago 2004||17 Mar 2005||Sigurjonsson Gudmundur Fertram||Wound dressing and method for manufacturing the same|
|US20050147797 *||7 Abr 2003||7 Jul 2005||Guglielmo Biagiotti||Device and method for joining layers for forming sheet products and resulting products|
|US20070023135 *||2 Abr 2003||1 Feb 2007||Claudio Giacometti||Method and device to produce a perforated web material|
|US20070066925 *||22 Nov 2006||22 Mar 2007||Gudnason Palmar I||Wound dressing and method for manufacturing the same|
|US20070202220 *||28 Feb 2006||30 Ago 2007||Dicosola Susan T||Food storage preserver|
|US20070255194 *||29 Jun 2007||1 Nov 2007||Gudnason Palmar I||Wound dressing and method for manufacturing the same|
|DE2406525A1 *||12 Feb 1974||22 Ago 1974||Procter & Gamble||Saugfaehiges gebilde|
|DE3723596A1 *||16 Jul 1987||26 Ene 1989||Squibb & Sons Inc||Medical plaster|
|EP0018684A1 *||22 Abr 1980||12 Nov 1980||THE PROCTER & GAMBLE COMPANY||Disposable absorbent structure having a textured macroscopically perforated thermoplastic film topsheet|
|EP0275353A2 *||4 Jul 1987||27 Jul 1988||The B.F. Goodrich Company||Perforated elastomeric soft film and wound dressing made therewith|
|EP0360929A1 *||2 Sep 1988||4 Abr 1990||VERATEC, INC. (a Delaware corp.)||Fibre-film substrate|
|EP0598970A1 *||17 Nov 1992||1 Jun 1994||PANTEX S.r.l.||Method and apparatus for manufacturing a product in membrane or film for covering sanitary towels or nappies or for filtering systems, and such like|
|Clasificación de EE.UU.||602/47, 428/138, 602/43, 428/163, 428/165|
|Clasificación internacional||A61F13/00, A61F13/15|
|Clasificación cooperativa||A61F13/15731, A61F2013/51372, A61F2013/00859, A61F13/00021, A61F2013/00327, A61F2013/00251, A61F2013/51078, A61F2013/00731|
|Clasificación europea||A61F13/00, A61F13/15M6C|