Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.


  1. Búsqueda avanzada de patentes
Número de publicaciónUS3292619 A
Tipo de publicaciónConcesión
Fecha de publicación20 Dic 1966
Fecha de presentación6 Dic 1963
Fecha de prioridad6 Dic 1963
Número de publicaciónUS 3292619 A, US 3292619A, US-A-3292619, US3292619 A, US3292619A
InventoresVernon C Egler
Cesionario originalKendall & Co
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Absorbent dressing
US 3292619 A
Resumen  disponible en
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

Dec. 20, 1966 v, E L R 3,292,619


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

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US2633442 *8 Mar 194931 Mar 1953Albert E CaldwellMethod of making tufted material
US3053722 *8 Jun 195911 Sep 1962Hudson Engineering CorpRib forming method
US3073304 *8 Ago 196015 Ene 1963Kendall & CoPerforated adhesive tape and bandage formed therewith
US3085572 *6 Oct 196116 Abr 1963Johnson & JohnsonTape
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3399671 *1 Feb 19663 Sep 1968Kendall & CoSpray coated absorbent dressing
US3438371 *2 May 196615 Abr 1969Kendall & CoSelf-adhesive dressing
US3446208 *27 Jun 196627 May 1969Alc LtdPorous polyolefin gauze
US3481806 *5 Sep 19672 Dic 1969Huyck CorpMethod of making a bandaging and dressing material
US3482570 *18 Ene 19679 Dic 1969Wolfgang DuffnerSurgical dressing and method of producing the same
US3509007 *18 Mar 196828 Abr 1970Johnson & JohnsonPerforated sheet material
US3539433 *31 Jul 196710 Nov 1970Chrysler CorpFabric overlain with interstitially separated segments of thermoplastic material
US3566883 *21 Jun 19672 Mar 1971Hochstadt Adley HHairdressing tape
US3814101 *4 Dic 19724 Jun 1974Union Carbide CorpDisposable absorbent articles
US3886941 *18 Jun 19743 Jun 1975Union Carbide CorpDiaper insert
US3890974 *18 Jun 197424 Jun 1975Union Carbide CorpDisposable absorbent article containing slitted hydrogel film
US3929135 *20 Dic 197430 Dic 1975Procter & GambleAbsorptive structure having tapered capillaries
US3967623 *30 Jun 19756 Jul 1976Johnson & JohnsonDisposable absorbent pad
US3989867 *16 Feb 19732 Nov 1976The Procter & Gamble CompanyAbsorptive devices having porous backsheet
US4081580 *25 Ago 197528 Mar 1978Eiji KatoPaper wrapper for wrapping refrigerated meat
US4121960 *19 Nov 197624 Oct 1978Scott Paper CompanyPerforated, embossed film to foam laminates
US4280978 *23 May 197928 Jul 1981Monsanto CompanyProcess of embossing and perforating thermoplastic film
US4591523 *31 May 198527 May 1986The Procter & Gamble CompanyApertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission
US4637819 *31 May 198520 Ene 1987The Procter & Gamble CompanyMacroscopically expanded three-dimensional polymeric web for transmitting both dynamically deposited and statically contacted fluids from one surface to the other
US4726976 *28 Oct 198623 Feb 1988The Kendall CompanyComposite substrate
US4798604 *26 Ago 198617 Ene 1989Smith And Nephew Associated Companies P.L.C.Contoured film
US4839216 *1 Jun 198713 Jun 1989The Procter & Gamble CompanyFormed material produced by solid-state formation with a high-pressure liquid stream
US5171238 *16 Mar 198915 Dic 1992The Transzonic CompaniesAbsorbent pad with fibrous facing sheet
US5268213 *4 Ene 19937 Dic 1993Uni-Charm CorporationLiquid-permeable topsheet for body fluid absorbent articles
US5328450 *27 Sep 199312 Jul 1994Smith & Nephew PlcAbsorbent devices and precursors therefor
US5370764 *6 Nov 19926 Dic 1994Kimberly-Clark CorporationApparatus for making film laminated material
US5449340 *3 Jun 199312 Sep 1995Tollini; Dennis R.Bandage for replaceable dressing
US5480719 *1 Sep 19942 Ene 1996Tollini; Dennis R.Securing tape
US5580418 *2 Dic 19943 Dic 1996Kimberly-Clark CorporationApparatus for making film laminated material
US5591149 *7 Oct 19927 Ene 1997The Procter & Gamble CompanyAbsorbent article having meltblown components
US5667619 *22 Mar 199616 Sep 1997Kimberly-Clark Worldwide, Inc.Method for making a fibrous laminated web
US5667625 *2 Abr 199616 Sep 1997Kimberly-Clark Worldwide, Inc.Apparatus for forming a fibrous laminated material
US5681300 *27 Nov 199528 Oct 1997The Procter & Gamble CompanyAbsorbent article having blended absorbent core
US5709829 *8 Jul 199620 Ene 1998Pantex S.R.L.Method for manufacturing product in membrane or film form
US5814389 *8 Jul 199629 Sep 1998Pantex, S.R.L.Apertured three-dimensional product in membrane or film form for covering sanitary, disposable absorbent products
US5814390 *30 Jun 199529 Sep 1998Kimberly-Clark Worldwide, Inc.Creased nonwoven web with stretch and recovery
US5817394 *8 Nov 19936 Oct 1998Kimberly-Clark CorporationFibrous laminated web and method and apparatus for making the same and absorbent articles incorporating the same
US6004893 *30 Ago 199621 Dic 1999The Procter & Gamble CompanyShaped sanitary napkin with flaps
US6103953 *31 Jul 199815 Ago 2000The Procter & Gamble CompanyAbsorbent article having fused layers
US63192398 May 199820 Nov 2001The Procter & Gamble CompanyAbsorbent article having improved integrity and acquisition
US660305225 May 20015 Ago 2003John E. DavisFluid absorbent article for surgical use
US71020544 May 19995 Sep 2006The Procter & Gamble CompanyAbsorbent article having fused layers
US73042023 Dic 20034 Dic 2007Ossur HfWound dressing
US7381860 *22 Nov 20063 Jun 2008Hf OssurWound dressing and method for manufacturing the same
US739697525 Ago 20048 Jul 2008Ossur HfWound dressing and method for manufacturing the same
US74111093 Dic 200312 Ago 2008Ossur HfMethod for producing a wound dressing
US74231933 Dic 20039 Sep 2008Ossur, HfWound dressing
US74595983 Dic 20032 Dic 2008Ossur, HfWound dressing
US74684713 Dic 200323 Dic 2008Ossur, HfWound dressing having a facing surface with variable tackiness
US74708303 Dic 200330 Dic 2008Ossur, HfMethod for producing a wound dressing
US748886426 Jun 200710 Feb 2009Ossur HfWound dressing
US753171125 May 200512 May 2009Ossur HfWound dressing and method for manufacturing the same
US76964003 Dic 200313 Abr 2010Ossur HfWound dressing
US77456823 Jul 200829 Jun 2010Ossur HfWound dressing and method for manufacturing the same
US791079316 Abr 200822 Mar 2011Ossur HfWound dressing
US809344528 Oct 200810 Ene 2012Ossur HfWound dressing and method for manufacturing the same
US82476358 Mar 201021 Ago 2012Ossur HfWound dressing
US20070202220 *28 Feb 200630 Ago 2007Dicosola Susan TFood storage preserver
DE2406525A1 *12 Feb 197422 Ago 1974Procter & GambleSaugfaehiges gebilde
DE3723596A1 *16 Jul 198726 Ene 1989Squibb & Sons IncMedical plaster
EP0018684A1 *22 Abr 198012 Nov 1980THE PROCTER & GAMBLE COMPANYDisposable absorbent structure having a textured macroscopically perforated thermoplastic film topsheet
EP0275353A2 *4 Jul 198727 Jul 1988The B.F. Goodrich CompanyPerforated elastomeric soft film and wound dressing made therewith
EP0360929A1 *2 Sep 19884 Abr 1990VERATEC, INC. (a Delaware corp.)Fibre-film substrate
EP0598970A1 *17 Nov 19921 Jun 1994PANTEX 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 internacionalA61F13/00, A61F13/15
Clasificación cooperativaA61F13/15731, A61F2013/51372, A61F2013/00859, A61F13/00021, A61F2013/00327, A61F2013/00251, A61F2013/51078, A61F2013/00731
Clasificación europeaA61F13/00, A61F13/15M6C