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Publication numberUS2659935 A
Publication typeGrant
Publication date24 Nov 1953
Filing date18 Mar 1950
Priority date18 Mar 1950
Publication numberUS 2659935 A, US 2659935A, US-A-2659935, US2659935 A, US2659935A
InventorsHammon Henry George
Original AssigneeChristopher L Wilson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of making compressed sponges
US 2659935 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

NOV. 24, 1953 G, HAMMON 2,659,935

METHOD OF MAKING COMPRESSED SPONGES Filed March 18, 1950 Patented Nov. 24, 1953 METHOD E MAKING COMPRESSE!) sPoNGES Henry George Hammon, Stevensville, Mich., as-

signor, by mesne assignments, to Christopher L. Wilson, Columbus, Ohio Y Application March 18, 1950, Serial No. 150,418

2 Claims.

This invention relates to a method of making a compressed Sponge particularly such a sponge comprising polyvinyl formal and in which from 35 to 80% oi the hydroxyl groups of the alcohol have been reacted.

In the copending application of Christopher L.

Wilson, Serial No. 29,657, iiled May 27, 1948, now

Y Patent No. 2,609,347 which is a continuation-inpart of application Serial No. 769,537, led August 19, 194.7, now abandoned, there iS described and claimed a polyvinyl formal sponge which may be used as an ordinary sponge or may be cut in thin sheets to make a synthetic wash cloth, chamois skin and the like. These Sponges, as described in the Wilson application, are tough and tear resistant and are resistant to the action of most ordinary chemicals with which they might come in contact. The Sponges have interconnected pores so that they are capable of absorbing and holding a large quantity of water or other liquid.

When the Sponges of the above copending application are dry, they are very hard and resistant to deformation. However, when they are wet, they become quite soft and resilient and can be handled as ordinary Sponges.

'When the Sponges are sold in their normal size and shape they occupy a considerable space so that relatively few Sponges can be packaged in an ordinary shipping container. The large space ocdried until they are hard throughout and dry to the touch. The sponge preferably contains not more than about 2 or 3% water. When the dry Sponge is compressed at a pressure suiiicient to reduce materially the bulk of the sponge, the compressed sponge retains its shape when the pressure is removed and does not resume its original shape until it is wet with water. The preferred pressure is at least 100 pounds per square inch, although pressures up to 1,000 pounds per square inch or more may be employed. This pressure is applied until the sponge has been reduced to a thickness of preferably not less than about Il.; its

normal thickness. In actual practice, the Sponges are compressed to about yf, their normal thickness. The Sponges are compressed preferably at ordinary room temperatures as an excessive temperature causes the Sponges to assume a permanent Set so that they will not recover fully when wet. The temperature at which the dry Sponges attain a permanent Set is considerably above normal atmospheric temperatures.

One of the features of this invention is the method of making a compressed polyvinyl formal sponge so that when the pressure is removed the Sponge will maintain its reduced thickness until the Sponge has been wet with Water; another feature of the invention is the compressed Sponge produced by this method. Other features and advantages of the invention will be apparent from the following description and the accompanying drawings. Of the drawings:

Fig. 1 is a fragmentary side elevation of a typical press in open position with a dry polyvinyl formal Sponge arranged therein; Fig. 2 is a View similar to Fig. 1, but showing the Sponge compressed; and Fig. 3 is a perspective view of the compressed sponge.

In the drawings there is illustrated a press having a lower platen I0 and an upper platen or ram Il. Arranged between these platens is a poly- Vinyl formal Sponge l2 that has been dried preferably until it contains not more than about 3% water. -Pressure is applied to the platen l l to compress the dried sponge until it has, for example, the approximate relative thickness shown in Fig. 2. When the compressed sponge is removed from the press, it retains its compressed shape, as shown in Fig. 3, until it has been thoroughly wet with water and at which time it immediately eX- pands until it is Slightly larger than the sponge shown in Fig. 1. The wet sponge is slightly larger than when it is dry as the drying step itself causes a Slight shrinkage in the sponge.

Although the method illustrated in the drawings shows the sponge being compressed through its smallest dimension, it is believed obvious that the Sponge could be compressed through any one or more directions. Therefore, when in the Specification and claims the Sponge is said to be reduced in thickness, this is intended to include not only the smallest dimension, but also the largest dimension or any other dimension. Thus, the sponge could be compressed longitudinally of its major axis, laterally of its major axis or in other desired direction.

Having described my invention as related to various embodiments of the Same, it is my inten- 3 tion that the invention be not limited by any of the details of description unless otherwise specified, but rather be construed broadly Within its spirit and -scope as set out in the accompanying claims.

I claim:

1. The method of making a compressed sponge which comprises providing a polyvii'iylV formal sponge having interconnected pores throughout, prepared from polyvinyl alcohol and having from 35 to 80% of the hydroxyl groupsof-thealcohol reacted, said sponge containing not more Vthan about 3% Water, and compressing said sponge under a pressure sufcientito.reducefmaterially the bulk of said sponge, saidspongebeing maintained during the compressing step at a tempera; ture lessI than that at which thesponge assumes a permanent set.

2. The method of making a compressed sponge which comprises providing a polyvinyl formal sponge having interconnected pores throughout, prepared from polyvinyl alcohol containing tsub-- stantially-no residual hydrolyzablegroups and having from 35 to 80% of the hydroxyl groups of the alcohol reacted, said sponge containing not more than about 3% water, and compressing said sponge under a pressure of at least 100 pounds per square inch until the sponge has a thickness of not less than about one-tenth of its 'original thickness, said spor'ige beingmaintained at lsubs'tar'itially"atmospheric temperature during the compressing step.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2532241 *9 Jul 194928 Nov 1950Monsanto ChemicalsPolyvinyl acetal foams
GB539785A * Title not available
GB573966A * Title not available
GB578513A * Title not available
GB578525A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2761141 *28 Aug 195128 Aug 1956Corkum Russell WContinuously varying dielectric constant electromagnetic lens
US2858830 *1 Oct 19564 Nov 1958Frank C LoweSurgical dressing
US2865283 *30 Mar 195523 Dec 1958Stoffer Lewis JMethod of forming dry compressed compact sponge unit
US2899708 *14 Jun 195418 Aug 1959 Modification and control of plastic
US2933767 *21 Sep 195426 Apr 1960Cogepa EtsImproved method of post compressing a carbamide resin foam
US3000464 *18 Sep 195719 Sep 1961Bolt Beranek & NewmanAcoustic absorber
US3045286 *26 Aug 195924 Jul 1962Crown Machine & Tool CompanyMethod of making dispensable cups
US3101242 *1 Feb 196120 Aug 1963V L Smithers Mfg CompanyProcess of making flexible absorbent material
US3189669 *1 Nov 196215 Jun 1965Goldfein SolomonProcess for shipping flexible polyurethane foam
US3196197 *1 Nov 196220 Jul 1965Goldfein SolomonProcess for shipping rigid polyurethane foam
US3246059 *8 Oct 196212 Apr 1966Collo Rheincollodium Koln G MProcess for the preparation of form pressed parts of light specific gravity from foamed synthetic plastics
US3282415 *1 Jun 19641 Nov 1966Gen Foam CorpExpanded cellular products
US3342922 *9 Oct 196319 Sep 1967Dow Chemical CoMethod of preparing re-expandable foam
US3344221 *16 Aug 196326 Sep 1967Du PontMethod for inflating or deflating closed cell foams
US3381077 *26 Jan 196630 Apr 1968Du PontMethod for inflating closed cell foams
US3426888 *22 May 196711 Feb 1969Rainbow Crafts IncColoring set
US3906137 *21 Jan 197416 Sep 1975Roehm GmbhLaminate having a compressed foam core
US4066488 *7 Apr 19773 Jan 1978Lehr Alfred Von DerProcess for the joining (bonding) of lines (strips)
US4180073 *29 Aug 197725 Dec 1979Alza CorporationDevice for delivering drug to biological environment
US4203442 *4 Jan 197920 May 1980Alza CorporationDevice for delivering drug to a fluid environment
US4529569 *29 Sep 198316 Jul 1985Margaret PalauMethod of manufacturing an expandable spongy member
US4672707 *13 Oct 198116 Jun 1987Johnson Arnold WWashing device
US4890485 *25 Jan 19882 Jan 1990Hsu Charles JMechanism which reacts to the presence of oil and/or water
US5042227 *15 Dec 198927 Aug 1991659897 Ontario LimitedMethod & apparatus for compression packaging
US5567612 *27 Jul 199322 Oct 1996Massachusetts Institute Of TechnologyGenitourinary cell-matrix structure for implantation into a human and a method of making
US5709854 *30 Apr 199320 Jan 1998Massachusetts Institute Of TechnologyTissue formation by injecting a cell-polymeric solution that gels in vivo
US5716404 *16 Dec 199410 Feb 1998Massachusetts Institute Of TechnologyBreast tissue engineering
US5741685 *7 Jun 199521 Apr 1998Children's Medical Center CorporationParenchymal cells packaged in immunoprotective tissue for implantation
US5770417 *28 Feb 199423 Jun 1998Massachusetts Institute Of Technology Children's Medical Center CorporationThree-dimensional fibrous scaffold containing attached cells for producing vascularized tissue in vivo
US5804178 *28 Feb 19948 Sep 1998Massachusetts Institute Of TechnologyImplantation of cell-matrix structure adjacent mesentery, omentum or peritoneum tissue
US5843060 *2 Jan 19971 Dec 1998Xomed Surgical Products, Inc.Non-adherent nasal, sinus and otic packing and method for processing sponge materials in fabrication of packings
US5851833 *7 Aug 199622 Dec 1998Children's Medical Center Corp.Neomorphogenesis of urological structures in vivo from cell culture
US6045741 *10 Jul 19974 Apr 2000Bridgestone CorporationPreparation of flexible polyurethane foam
US6129761 *7 Jun 199510 Oct 2000Reprogenesis, Inc.Injectable hydrogel compositions
US616912323 Jul 19982 Jan 2001Xomed Surgical Products, Inc.Non-adherent nasal, sinus and otic packing and method for processing sponge materials in fabrication of packings
US6212725 *29 Sep 199810 Apr 2001Aqua Products Inc.Segmented brush assembly for power driven pool cleaner
US621489514 Sep 200010 Apr 2001Xomed Surgical Products, Inc.Method for making a polyvinyl acetal sponge packing for use in the nasal, sinus and otic cavities
US622463029 May 19981 May 2001Advanced Bio Surfaces, Inc.Implantable tissue repair device
US628101516 Dec 199428 Aug 2001Children's Medical Center Corp.Localized delivery of factors enhancing survival of transplanted cells
US630963528 Nov 199430 Oct 2001Children's Medical Center Corp.Seeding parenchymal cells into compression resistant porous scaffold after vascularizing in vivo
US63480693 Nov 199819 Feb 2002Children's Medical Center CorporationEngineering of strong, pliable tissues
US6495085 *28 Jul 200017 Dec 2002The Soundcoat Company, Ltd.Method of conditioning foam materials by compression
US684096225 Sep 200011 Jan 2005Massachusetts Institute Of TechnologyTissue engineered tendons and ligaments
US70449572 Feb 200116 May 2006Ethicon Endo-Surgery, Inc.Devices for defining and marking tissue
US718923519 Mar 200313 Mar 2007Anulex Technologies, Inc.Spinal disc annulus reconstruction method and spinal disc annulus stent
US722941715 Oct 200412 Jun 2007Ethicon Endo-Surgery, Inc.Methods for marking a biopsy site
US7540126 *19 Apr 20062 Jun 2009Hbi Branded Apparel Enterprises, LlcSystem and method for compactly packaging apparel
US76150763 May 200510 Nov 2009Anulex Technologies, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US762539718 Sep 20011 Dec 2009Ethicon Endo-Surgery, Inc.Methods for defining and marking tissue
US76685827 Oct 200423 Feb 2010Ethicon Endo-Surgery, Inc.Biopsy site marker
US767037916 Feb 20062 Mar 2010Anulex Technologies, Inc.Spinal disc annulus reconstruction method
US774927315 Mar 20076 Jul 2010Anulex Technologies, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US78071508 Mar 20045 Oct 2010Massachusetts Institute Of TechnologyInjectable composition containing crosslinkable material and cells for forming animal tissue
US782885010 Feb 20069 Nov 2010Anulex Technologies, Inc.Methods and devices for spinal disc annulus reconstruction and repair
US79098799 Nov 200622 Mar 2011Anulex Technologies, Inc.Intervertebral disc annulus stent
US79145799 Feb 200629 Mar 2011Children's Medical Center CorporationTissue engineered tendons and ligaments
US792276814 Nov 200612 Apr 2011Anulex Technologies, Inc.Spinal disc annulus reconstruction method and deformable spinal disc annulus stent
US793514726 Sep 20053 May 2011Anulex Technologies, Inc.Method and apparatus for enhanced delivery of treatment device to the intervertebral disc annulus
US795120112 Jan 200731 May 2011Anulex Technologies, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US79639928 Oct 200821 Jun 2011Anulex Technologies, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US79852576 Nov 200626 Jul 2011Anulex Technologies, Inc.Methods and devices for spinal disc annulus reconstruction and repair
US79934058 Dec 20069 Aug 2011Anulex Technologies, Inc.Spinal disc annulus repair system and methods
US80341129 Nov 200611 Oct 2011Anulex Technologies, Inc.Spinal disc annulus reconstruction method and spinal disc annulus stent
US804816022 Dec 20051 Nov 2011Anulex Technologies, Inc.Intervertebral disc annulus stent
US808816523 Mar 20063 Jan 2012Anulex Technologies, Inc.Spinal disc annulus reconstruction method and deformable spinal disc annulus stent
US812869814 Oct 20086 Mar 2012Anulex Technologies, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US82773917 Aug 20022 Oct 2012Devicor Medical Products, Inc.Methods and devices for defining and marking tissue
US830660230 Sep 20056 Nov 2012Devicor Medical Products, Inc.Biopsy cavity marking device
US832099313 Mar 200127 Nov 2012Devicor Medical Products, Inc.Subcutaneous cavity marking device
US83209946 Oct 200427 Nov 2012Devicor Medical Products, Inc.Biopsy cavity marking device and method
US84546975 Apr 20124 Jun 2013Anulex Technologies, Inc.Method and apparatus for the treatment of tissue
US855697712 Nov 201015 Oct 2013Anulex Technologies, Inc.Tissue anchoring system and method
US86004815 Sep 20123 Dec 2013Devicor Medical Products, Inc.Subcutaneous cavity marking device
US863259026 Sep 200621 Jan 2014Anulex Technologies, Inc.Apparatus and methods for the treatment of the intervertebral disc
US909544223 Jan 20124 Aug 2015Krt Investors, Inc.Method and apparatus for the treatment of the intervertebral disc annulus
US911402529 Jun 201125 Aug 2015Krt Investors, Inc.Methods and devices for spinal disc annulus reconstruction and repair
US91923723 Jun 201324 Nov 2015Krt Investors, Inc.Method for the treatment of tissue
US928958528 Oct 201322 Mar 2016Donald SpectorCompressed articles with microencapsulation
US938099820 Feb 20145 Jul 2016Devicor Medical Products, Inc.Subcutaneous cavity marking device and method
US949257011 May 201015 Nov 2016Devicor Medical Products, Inc.Device and method for safe location and marking of a biopsy cavity
US966911323 Dec 19996 Jun 2017Devicor Medical Products, Inc.Device and method for safe location and marking of a biopsy cavity
US967534730 Dec 201313 Jun 2017Krt Investors, Inc.Apparatus for the treatment of tissue
US20040170612 *8 Mar 20042 Sep 2004Griffith Linda G.Injectable polysaccharide-cell compositions
US20050060033 *6 Aug 200417 Mar 2005Vacanti Charles A.Tissue engineered tendons and ligaments
US20070005139 *9 Feb 20064 Jan 2007Vacanti Charles ATissue engineered tendons and ligaments
US20070197457 *29 Mar 200423 Aug 2007Dan GazitTak1-mediated inhibition of osteogenesis
US20070220829 *27 Mar 200627 Sep 2007Li Chun WPackaged product and method of manufacture
US20070245692 *19 Apr 200625 Oct 2007Abbott Michael DSystem and method for compactly packaging apparel
US20070271716 *14 Jun 200629 Nov 2007Donald SpectorCompressed Articles
US20080006962 *7 Jul 200610 Jan 2008Ya-Ming YauMethod for manufacturing environmental protection sponge
US20080039890 *30 Jan 200714 Feb 2008Surgica CorporationPorous intravascular embolization particles and related methods
US20100209400 *30 Nov 200919 Aug 2010Dan GazitTAK1-Mediated Regulation of Osteogenesis
USRE4247919 Feb 200421 Jun 2011Children's Medical Center CorporationEngineering of strong, pliable tissues
USRE4257528 Sep 200626 Jul 2011Children's Medical Center CorporationEngineering of strong, pliable tissues
EP2075015A12 Jul 19981 Jul 2009Massachusetts Institute of TechnologyTissue-engineered constructs
WO2002009920A1 *27 Jul 20017 Feb 2002The Soundcoat Company, Inc.Method of conditioning foam materials by compression
WO2004087862A229 Mar 200414 Oct 2004Yissum Research Development Company Of The Hebrew University Of JerusalemTak1-mediated inhibition of osteogenesis
WO2006025785A1 *1 Sep 20059 Mar 2006Care In Motion AbCare system
WO2015097403A3 *23 Dec 201420 Aug 2015Compagnie Plastic OmniumProcess for producing a plastic part having a foam core
WO2017076782A128 Oct 201611 May 2017Novahep AbCompositions and methods for healing wounds
Classifications
U.S. Classification264/321, 521/141, 15/244.4
International ClassificationB29C43/00, C08J9/36
Cooperative ClassificationC08J9/36, B29C43/003, C08J2329/00, B29K2105/04
European ClassificationC08J9/36, B29C43/00B