Cellulosic (e.g., Wood, Paper, Cork, Rayon, Etc.) Patents (Class 428/326)
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Patent number: 5135793Abstract: A laminate having high strength and excellent resistance to moisture comprised of a fiberglass reinforced polyester panel adhesively attached with a water reactive adhesive to a tempered hardboard panel.Type: GrantFiled: May 24, 1990Date of Patent: August 4, 1992Assignee: The Standard Oil CompanyInventor: Robert P. Socha
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Patent number: 5134026Abstract: A process for the production of a synthetic resin pressure molded body in which a bonding agent containing a condensation resin or condensation resin mixture produced mainly on the basis of phenolic compounds and aldehydes in liquid or brushable form is heated to an elevated temperature to lower its viscosity and is applied to dried wood fibers in an amount of 25 to 50% of the amount of the wood fibers and optionally together with other materials such as surface and/or intermediate layers is hot pressed while the resin is hardening, whereby the moisture content of the dried wood fibers is at most 10%, the condensation resin or condensation resin mixture having a solid resin content of at least 80% by weight and a water content of at most 7% by weight and the bonding agent contains optional additives.Type: GrantFiled: July 13, 1989Date of Patent: July 28, 1992Assignee: Isovolta Osterreichische Isolierstoffwerk AktiengesellschaftInventor: Gerhard Melcher
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Patent number: 5132144Abstract: Paperboard packaging material for use in the manufacture of cartons for browning and crisping food in a microwave oven is prepared on a printing press using an aqueous susceptor-ink composition comprising graphite or conductive carton black dispersed in a solution of sodium silicate. The susceptor-ink composition is printed on the packaging material in a pattern corresponding to the location of the food intended to be packaged and the food contact surface is overprinted with an FDA approved food contact coating. The use of sodium silicate as the binder for the susceptor-ink composition allows the composition to be printed by gravure or flexographic printing processes and provides hereto unavailable flame retardant properties to the final packaging material.Type: GrantFiled: August 30, 1990Date of Patent: July 21, 1992Assignee: Westvaco CorporationInventor: Christopher J. Parks
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Patent number: 5110657Abstract: An anti-skid coating composition for coating various substrates including structural panel board surfaces, comprises a binder made of urea formaldehyde resin, polyvinyl acetate, ammonium chloride and a dispersant. The binder is used in conjunction with an aggregate, such as walnut shells. A method is also provided for coating the substrates to impart slip resistance thereto.Type: GrantFiled: May 22, 1990Date of Patent: May 5, 1992Assignee: Reichhold Chemicals, Inc.Inventor: Winston C. Ainslie
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Patent number: 5106666Abstract: Composite particleboards and methods for manufacturing these particleboards are provided in which a plurality of discrete lignocellulosic particles are bonded together to form a core and then hot pressed with a plurality of reinforced strips having a thickness of less than about 6.4 mm for improving the bending strength of the particleboard structure. Both the modulus of rupture and modulus of elasticity of particleboard materials are demonstrated to have been improved significantly.Type: GrantFiled: April 2, 1990Date of Patent: April 21, 1992Assignee: Union Camp CorporationInventors: Jack D. Fitzgerald, George W. Doege, Jr.
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Patent number: 5100770Abstract: Disclosed is a support used for photographic materials which is prevented from staining of the edge portion which is caused by permeation of developing solution from cut section. This support for photographic materials comprises a base paper both sides of which are coated with a resin, said base paper containing a titanium oxide coated with at least one metal oxide selected from the oxides of Al, Si, Mn, Zn and Ti.Type: GrantFiled: October 5, 1990Date of Patent: March 31, 1992Assignee: Mitsubishi Paper Mills LimitedInventor: Tetsuya Ashida
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Patent number: 5093185Abstract: A wear and gouge resistant decorative laminate is made by consolidating, under heat and pressure, a suitable backing over which lays a decor layer covered by an overlay sheet, the overlay sheet being provided on its upper surface with an ultra-thin abrasion resistant layer consistent with the disclosure of Scher et al. U.S. Pat. No. 4,255,480 and optionally O'Dell et al. U.S. Pat. No. 4,499,137.Type: GrantFiled: April 1, 1991Date of Patent: March 3, 1992Assignee: Nevamar CorporationInventors: Israel S. Ungar, Robin D. O'Dell, Joseph A. Lex
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Patent number: 5091245Abstract: Degradable particulate absorbent materials, together with processes for manufacture thereof, wherein the absorbent materials: i) have, in most forms of the inventions, only on the order of 0% to 10%, by weight, of inorganic solids or "fillers", and in all forms have less than 30% inorganic solids by weight; ii) are not in pellet form; iii) are characterized by an open porous fiber structure having relatively low bulk densities on the order of not more than 13 lbs./ft..sup.3 and preferably only from about 6 to about 10 lbs./ft.sup.Type: GrantFiled: September 5, 1989Date of Patent: February 25, 1992Inventor: Christopher R. Phillips
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Patent number: 5082727Abstract: The flameproof product contains fibre material and/or fillers and a reaction resin as binder and several flameproofing agents. The flameproofing agents are a combination of organic borates, salts of phosphoric acids and oxide hydrates of magnesium and/or of aluminum, the total amount of which in the product is 3-35% by weight. Products which contain this combination of flameproofing agents and up to 50% by weight of reaction resin are resistant to glowing combustion according to DIN 53,459 and have a subsequent glowing combustion time of less than 1 min according to Nordtest NT-Fire 002.Type: GrantFiled: December 22, 1989Date of Patent: January 21, 1992Assignee: Matec Holding AGInventors: Stan Thijssen, Jurgen Laser
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Patent number: 5047280Abstract: A `high density` corrugated wafer board panel is provided. The wafer board panel has a substantially uniform density ranging from between about 700 kg/m.sup.3 to 900 kg/m.sup.3. As a result of increasing the density of the panel without changing the panel weight per projected unit area, a panel having improved overall flexure performance properties is provided.Type: GrantFiled: January 3, 1989Date of Patent: September 10, 1991Assignee: Alberta Research CouncilInventor: Lars Bach
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Patent number: 5043206Abstract: An absorption body intended for disposable articles such as diapers, sanitary napkins or the like and comprising highly absorbent material. A distinguishing feature of an absorption body made in accordance with the invention is that there is included therein a first layer intended to be placed against the wearer's body and which is soft, with a bulk exceeding 10 cm.sup.3 /g, preferably more than 13 cm.sup.3 /g, and at least one second layer which is heavily compressed to a bulk of less than 10 cm.sup.3 /g; and that the highly absorbent material is applied in the heavily compressed layer or layers.Type: GrantFiled: July 16, 1986Date of Patent: August 27, 1991Assignee: Molnlycke ABInventor: Ingela Ternstrom
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Patent number: 5043198Abstract: A lightsafe masking film is disclosed which comprises a substrate, and a peelable lightsafe layer provided over the surface of the substrate and including a binder, a lightsafe substance and at least one additive selected from a solid, organic filler and a liquid organopolysiloxane.Type: GrantFiled: February 2, 1989Date of Patent: August 27, 1991Assignee: Somar CorporationInventors: Hiroshi Maruyama, Naohiko Kiryu, Etsuko Minezaki
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Patent number: 5037694Abstract: A wear and gouge resistant decorative laminate is made by consolidating, under heat and pressure, a suitable backing over which lays a decor layer covered by an overlay sheet, the overlay sheet being provided on its upper surface with an ultra-thin abrasion resistant layer consistent with the disclosure of Scher et al. U.S. Pat. No. 4,255,480 and optionally O'Dell et al. U.S. Pat. No. 4,499,137.Type: GrantFiled: August 11, 1986Date of Patent: August 6, 1991Assignee: Nevamar CorporationInventors: Israel S. Ungar, Robin D. O'Dell, Joseph A. Lex
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Patent number: 5001005Abstract: A structural laminate comprises at least one planar facing sheet comprised largely of glass fibers but not having micro-glass as a filler. The facing sheet is self adhered to a rigid thermosetting plastic foam core. The non-glass filler material is chosen from a group consisting of clay, mica, talc, limestone (calcium carbonate), gypsum (calcium sulfate), aluminum trihydrate (ATH), antimony oxide, cellulose fibers, and plastic polymer fibers. The non-glass filler material improves containment of liquid plastic thermosetting polymer, and offers economic and safety advantages.Type: GrantFiled: August 17, 1990Date of Patent: March 19, 1991Assignee: Atlas Roofing CorporationInventor: Robert H. Blanpied
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Patent number: 4992519Abstract: Binder for the production of particle board and plywood with low formaldehyde emission which comprises a polymer formed fron an acidified starch hydrolyzate, urea and formaldehyde. Process for preparation of the polymer and for its use for production of particle board and plywood are also disclosed.Type: GrantFiled: February 1, 1989Date of Patent: February 12, 1991Assignee: Borden, Inc.Inventor: Subhankar Mukherjee
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Patent number: 4981747Abstract: A composite elastic material including at least one reversibly necked material and at least one elastic sheet joined at least at two locations in which the reversibly necked material is formed from a neckable material which has been treated so that, upon application of a force to extend the necked material to its pre-necked dimensions, the material returns generally to its necked dimensions upon termination of the force. Also disclosed is a process for making a composite elastic material by joining a reversibly necked material to an elastic sheet at least at two locations.Type: GrantFiled: September 23, 1988Date of Patent: January 1, 1991Assignee: Kimberly-Clark CorporationInventor: Michael T. Morman
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Patent number: 4970114Abstract: Pyrophoric powder can be coated on boron or carbon fibers or sintered with combustible particles. Carbon can be kept from contaminating diffusion-treated workpieces, by conducting diffusion treatment in retorts containing little or no carbon. Porosity can be created by subjecting workpiece to diffusion conditions in contact with depleting material such as powdered nickel or high-nickel aluminides or cobalt or high-cobalt aluminides. Aluminum particles can be electrophoretically deposited on foil and then diffused in. Leaching aluminum out with caustic is improved when a little H.sub.2 O.sub.2 is present in the caustic. Subsequent treatment of the leached surface with weak acid further improves pyrophoricity, and folding of the pyrophoric member extends its pyrophorically-generated high temperature dwell. Resin foil containing pyrophoric particles makes effective decoy.Type: GrantFiled: April 18, 1988Date of Patent: November 13, 1990Assignee: Alloy Surfaces Company, Inc.Inventor: Alfonso L. Baldi
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Patent number: 4965122Abstract: A reversibly necked material capable of stretching at least about 75 percent and recovering at least about 50 percent when stretched about 75 percent, typically in a direction generally parallel to the direction of necking. The reversibly necked material is made by applying a tensioning force to at least one material to neck the material, heating the necked material, and cooling the necked material that the reversibly necked material possesses a greater heat of fusion and/or a lower onset of melting than the material before heating while stretched.Type: GrantFiled: September 23, 1988Date of Patent: October 23, 1990Assignee: Kimberly-Clark CorporationInventor: Michael T. Morman
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Patent number: 4955171Abstract: The invention relates to a building panel constructed in layers, including main layer with a mixture of binder and reinforcing additive, and at least one further layer which can be a facing and/or intermediate layer, the further layer including a reinforcement and a binder. The formation of a homogeneous transitional layer betwee the main layer and the further layer insures that the composition of the components of the individual layers changes gradually so as to provide a stable multilayer panel which was improved elastomechanical properties.Type: GrantFiled: July 10, 1989Date of Patent: September 11, 1990Assignee: Fraunhofer Gesellschaft zur Forderund der Angewandten Forschung E.V.Inventors: Gert Kossatz, Wolfgang Heine, Karsten Lempfer, Heinz Sattler
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Patent number: 4939016Abstract: A composite nonwoven elastomeric web material, and method of forming such material, as well as a nonwoven elastomeric web material and method of forming such material, are disclosed. The composite web material is provided by hydraulically entangling a laminate of at least (1) a layer of meltblown fibers; and (2) at least one further layer, preferably of at least one of pulp fibers, staple fibers, meltblown fibers, and continuous filaments, with or without particulate material, with at least one of the layer of meltblown fibers and the further layer being elastic so as to form an elastic web material after hydraulic entanglement. The nonwoven elastomeric web material is provided by hydraulically entangling a layer of meltblown elastomeric fibers. The material formed can be cloth-like with smooth surfaces, and with isotropic elasticity and strength. Different texture properties, including a corrugated stretchable fabric, can be provided by pre-stretching and then hydraulically entangling while stretched.Type: GrantFiled: March 18, 1988Date of Patent: July 3, 1990Assignee: Kimberly-Clark CorporationInventors: Fred R. Radwanski, Lloyd E. Trimble, Roland C. Smith, Cherie H. Everhart, Deborah A. Kimmitt
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Patent number: 4933232Abstract: A binder/release system for the preparation of molded articles, especially lignocellulosic composites, which utilizes in combination with isocyanate-based binders a fatty material as an internal and/or external release agent, the fatty material being at least one polymerized fatty acid and/or at least one polycarboxyl compound containing a polymeric fatty radical(s).Type: GrantFiled: July 21, 1988Date of Patent: June 12, 1990Assignee: Jim Walter Research Corp.Inventors: Kenneth G. Trout, George A. Grozdits, Ernest K. Moss, James F. Daly
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Patent number: 4906484Abstract: An electrically conductive medium or high density lignocellulose particle board useful in the manufacture of flooring, wall paneling, and furniture functioning to establish static-free environments for the manufacture and operation of microcomputers and related equipment and protection from static electrical discharge problems generally. The particle boards comprise dry-formed, hot-consolidated mixtures of______________________________________ finely divided, electrically conductive carbon particles 0.2-5 particle board adhesive 1.5-15 lignocellulosic particles balance ______________________________________In this composition the carbon particles are characterized by having specific surface areas of at least 20 square meters per gram. The lignocellulose particles comprise lignocellulose chips and flakes having width to length ratios within the range of from 1--1 to 1-20, and lignocellulose strands having width to length ratios within the range of from 1--1 to 1-40 and minimum widths of one millimeter.Type: GrantFiled: January 22, 1988Date of Patent: March 6, 1990Assignee: Boise Cascade CorporationInventors: Alan L. Lambuth, Comer Brown
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Patent number: 4892769Abstract: Materials have at least one layer comprising a mixture of thermoplastic and other fibers. This latter layer may be thermobonded together and then densified along at least a section of the eventual peripheral edge margin of an article to be formed from the material. Thermoplastic material-containing cover sheets may also be secured to the core and densified in this manner. The entire eventual peripheral edge margin of the article is typically densified. Fire retardant materials may be thermobonded within the layer to fix them within the article. The densified edge also helps to fix these materials in place. The composite materials are used in manufacturing infant car seat liners and other articles. Fire retardant films may be included as cover sheets for these materials. These films are typically bonded at every point of contact to an underlying core.Type: GrantFiled: April 29, 1988Date of Patent: January 9, 1990Assignee: Weyerhaeuser CompanyInventors: Lee E. Perdelwitz, Jr., Paul G. Gaddis, Ron H. Iff, Michael E. Cotie, Amar N. Neogi
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Patent number: 4891454Abstract: A disposable infant seat liner is described with shoulder strap receiving slotways and leg or crotch strap receiving slotways designed to fit infant seat liners having various strap placements. Infant carrier handle or strap receiving slotways may also be included, and may be of an arcuate shape, for receiving infant carrier handles or waist straps. The strap receiving slotways may be selectively opened by a user and may also be perforated to facilitate this selective opening.Type: GrantFiled: April 29, 1988Date of Patent: January 2, 1990Assignee: Weyerhaeuser CompanyInventors: Lee E. Perdelwitz, Jr., David E. Hanke
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Patent number: 4888092Abstract: A paper sheet comprising a primary sheet having a layer of pulp fines on a surface thereof. The disclosed paper sheet has improved smoothness and hold out, and is particularly useful in carbonless record sheets and as a basesheet for high quality coated papers.Type: GrantFiled: September 22, 1987Date of Patent: December 19, 1989Assignee: The Mead CorporationInventors: Zenon Prusas, L. Oscar Uhrig, Gene W. Wisecup
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Patent number: 4886697Abstract: Materials have at least one layer comprising a mixture of thermoplastic and other fibers. This latter layer may be thermobonded together and then densified along at least a section of the eventual peripheral edge margin of an article to be formed from the material. Thermoplastic material-containing cover sheets may also be secured to the core and densified in this manner. The entire eventual peripheral edge margin of the article is typically densified. The material is cut within the densified region or slightly outside the densified region to provide a soft peripheral edge. Absorbent materials may be thermobonded within the layer and surrounded by a densified edge to fix them within the article. The composite materials are used in manufacturing infant car seat liners and other articles. In addition, sections of the material may be densified and provided with weakened areas, such as perforations, to enable users to selectively separate the articles along the perforations.Type: GrantFiled: April 29, 1988Date of Patent: December 12, 1989Assignee: Weyerhaeuser CompanyInventors: Lee E. Perdelwitz, Jr, Robert H. Young, Ron H. Iff, David E. Hanke, Kathleen S. Allison, Raimo K. Rahkonen, Amar N. Neogi
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Patent number: 4885200Abstract: A disposable infant seat liner in accordance with the present invention includes an upper section, a middle section and a lower section. Plural shoulder strap receiving slotways are provided in the upper section. These slotways may be accessible from side edges of the infant seat liner. In one embodiment, three shoulder strap receiving positions are provided at each side of the upper section to accommodate shoulder straps of various infant seat designs. First and second leg or crotch strap receiving slotways are also provided in a lower section of the infant seat liner. In one specific embodiment, a Y-shaped leg strap receiving slotway is positioned below an upwardly facing U-shaped slotway. In another embodiment, the lower slotway is T-shaped. Arched side cuts may also be provided in the central section of the infant seat liner to accommodate waist straps and to facilitate fitting of the infant seat liner to an infant car seat.Type: GrantFiled: April 29, 1988Date of Patent: December 5, 1989Assignee: Weyerhaeuser CompanyInventors: Lee E. Perdelwitz, Jr., David E. Hanke
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Patent number: 4883701Abstract: A disposable infant seat liner is described with shoulder strap receiving slotways and leg or crotch strap receiving slotways designed to fit infant seat liners having various strap placements. Infant carrier handle or strap receiving slotways may also be included, and may be of an arcuate shape, for receiving infant carrier handles or waist straps. The strap receiving slotways may be selectively opened by a user and may also be perforated to facilitate this selective opening.Type: GrantFiled: April 29, 1988Date of Patent: November 28, 1989Assignee: Weyerhaeuser CompanyInventors: Janice J. Rankin, Marilyn M. Pearson
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Patent number: 4883709Abstract: Here are disclosed a composite non-woven fabric having a high dimensional stability and a process for preparing such non-woven fabaric. This non-woven fabric is prepared by a cross-stretching starting non-woven fabric obtained by a fiber entanglement treatment of a staple fiber web by fluid jets to form a substrate, then introducing short fibers onto this cross-stretched substrate and filling said cross-stretched substrate with said short fibers by further fiber entanglement treatment also by fluid jets. Such composite non-woven fabric is suitable particularly as cloth for disposable medican garments or the like.Type: GrantFiled: October 24, 1988Date of Patent: November 28, 1989Assignee: Uni-Charm CorporationInventors: Satoshi Nozaki, Shigeo Imai, Makoto Ishigami, Katsushi Tomida
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Patent number: 4882213Abstract: An absorbent article is described which may be formed at least in part of thermoplastic and other fibers. The article is densified along a first region and has a tear line defined in the first region. A second region of lower density than the first region is provided at the termination point of the tear line to assist in stopping tearing along the tear line. In addition, densified reinforcing regions can be provided outside areas where the tear line curves or switches directions. Perforations or cuts in the tear line may extend continuously around the corner of the tear line to assist tearing around the corner.Type: GrantFiled: April 29, 1988Date of Patent: November 21, 1989Assignee: Weyerhaeuser CompanyInventors: Paul G. Gaddis, Lee E. Perdelwitz, Jr.
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Patent number: 4851069Abstract: A process of making a liquid absorbing laminated structure comprising long lengths of absorptive tissues and an intermediate layer of absorptive particles is performed while the tissues are traveling in the direction of their lengths. A film of moistening liquid is transferred to a surface of a first tissue which is then supported in substantially horizontal position and showered with dry absorbent particles, which are rendered adhesive by absorption of the moistening liquid. A second tissue is superposed and the assembly is bonded together by passing it through the nip between a heated roller having a surface temperature of at least 110.degree. C. and a pressure roller. These rollers are pressed together at the nip by a pressure of at least 350 pounds per square inch and each has a surface hardness in excess of 90 Shore A Durometer.Type: GrantFiled: June 20, 1984Date of Patent: July 25, 1989Assignee: Bird Machine Company, Inc.Inventors: Thomas D. Packard, William C. Goodchild
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Patent number: 4846932Abstract: Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper or the high water-absorbency sheet thus formed absorbs and solidifies the urine, allowing the urine to be disposed of easily, rapidly and hygienically.Type: GrantFiled: December 17, 1986Date of Patent: July 11, 1989Assignee: Kuromatsu Corporation Co., Ltd.Inventors: Takeshi Karita, Yoshiro Saito, Shunichiro Kuromatsu
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Patent number: 4844968Abstract: A thin, plate-shaped object, especially a door skin, and a method of manufacturing such object, comprising a resin impregnated outer layer arranged directly onto a layer of a binder impregnated wood fine chips layer acting as a forming support for the fibre sheet material.A layer of coarse wood chips acts as a reinforcing and handling characteristics defining layer for the relatively large (some m.sup.2) and relatively thin (2 to 5 millimeteres) door skin.Type: GrantFiled: April 14, 1987Date of Patent: July 4, 1989Assignee: Swedoor AktiebolagInventors: Goran Persson, Ove Gustavsson, Bernt-Ola Hugosson
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Patent number: 4840841Abstract: A disposable one-piece seat liner formed from a uniform layer of absorbant cellulosic fibers possessing sufficient integrity than it does not abrade during normal use bonded to a flexible moisture repellant backing sheet. The seat liner is designed for use on seals having a bottom, back, sidewalls and arms and has an upper and lower section with the upper section sized to cover the back of the seat with the side edges folding forward and the lower section sized to cover the bottom of the seat with the side edges folding upward along the arms of the seat joined by a fold line at the junction between the upper and lower sections. A plurality of slots are provided to accommodate the seat belts of a wide range of different care seats, strollers, carriers, highchairs and the like having attachment means passing between the legs of a person seated in the seat, coming over the shoulders or around the waist from the midpoint of the back of from the sides.Type: GrantFiled: March 15, 1988Date of Patent: June 20, 1989Inventor: John J. Madsen
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Patent number: 4837077Abstract: The invention relates to a hydroexpansible composite material, the method of preparing same and a composition for implementing this method, as well as to the uses thereof. The composite material includes a solid flat support having, on at least one of its faces, a coating with a high proportion of a hydroexpansible polymer powder fixed to the support by means of a hydrosoluble binder, the coating being essentially formed of:95 to 55% by weight of hydroexpansible polymer powder;5 to 23% by weight of hydrosoluble binder; and0 to 22% by weight of surfactant.This hydroexpansible material may advantageously be used in medicine, surgery agriculture and especially as sealing agent in cables, particularly electric cables.FIG. 2 shows how, in a cable, this material (11, 13) forms a sealing ring (13) about the point of infiltration of the water, thus preventing its longitudinal propagation.Type: GrantFiled: June 23, 1986Date of Patent: June 6, 1989Assignees: Intissel, NovacelInventors: Patrice Anton, Denis Bergaentzle
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Patent number: 4830929Abstract: A molded wooden product comprised of wood fibers to which a binder containing a synthetic resin or the like has been added, characterized in that it has portions of varying thickness, preferably a deep-drawn portion and a thickened peripheral portion, the molded wooden product being of substantially uniform density throughout.Type: GrantFiled: December 5, 1986Date of Patent: May 16, 1989Assignee: Toyota Jidosha Kabushiki KaishaInventors: Sadao Ikeda, Yoshio Taguchi
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Patent number: 4828643Abstract: A method of manufacturing a liquified fiber-phenol-formaldehyde resin includes heating a mixture of phenol, formaldehyde, liquified cellulosic fiber and alkali at a temperature of 60.degree. C. to 100.degree. C. and a pH of 8-13. The liquified cellulosic fiber comprises about 5 to about 80 percent of the total weight of phenol, formaldehyde and liquified fiber. Also disclosed are fibrous articles manufactured using this resin as a binder, such as fiberboards, particle board, plywood, oriented strand board, and waferboard.Type: GrantFiled: January 12, 1987Date of Patent: May 9, 1989Assignee: Masonite CorporationInventors: William Newman, Michael E. Rakauskas
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Patent number: 4822668Abstract: Disclosed is an elastic absorbent which comprises a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of a split yarn obtained by splitting a tape-form oriented laminate comprising at least one layer of a synthetic resin having a high melting point and at least one layer of a synthetic resin having a low melting point, in which the layer of the synthetic resin having a low melting point is at least partially exposed to the surface. Another elastic absorbent comprises an intermediate layer of a powdery polymeric water-absorbing agent, which is interposed between upper and lower layers, each of the upper and lower layers comprising a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of the same split yarn as mentioned above.Type: GrantFiled: April 30, 1987Date of Patent: April 18, 1989Assignee: Showa Denko Kabushiki KaishaInventors: Toyoaki Tanaka, Katuzi Ohira, Akira Nakamura, Ryosuke Kamei, Akihiro Hashimoto
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Patent number: 4820577Abstract: A nonwoven superabsorbent web comprising fibers composed of a superabsorbent, thermoplastic polymeric composition, such as a nonwoven superabsorbent web comprising a plurality of substantially randomly deposited monofilaments of a thermoplastic superabsorbent. Such a web is prepared by meltblowing a thermoplastic superabsorbent.Type: GrantFiled: December 22, 1986Date of Patent: April 11, 1989Assignee: Kimberly-Clark CorporationInventors: Michael T. Morman, Sharon L. Greene, Jose F. Pazos, Augusto Rodriguez
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Patent number: 4818604Abstract: A composite board is produced by the method of blending a cellulosic filler having sufficient extractable organic content and an expandable thermoplastic polymer, adding a tacifier agent during blending for producing a pre-blown mixture, heating the mixture in a mold to a temperature above the glass transition temperature of the polymer for a period of time sufficient to permit expansion of the beads and bonding of the expanded beads with the cellulosic filler to thereby form a composite board. The board may be laminated by a solvent based adhesive or a thermal insult coating so as to form rigid macro-voids between the laminate and the composite board surface.Type: GrantFiled: March 27, 1987Date of Patent: April 4, 1989Assignee: Sub-Tank Renewal Systems, Inc.Inventor: Richard W. Tock
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Patent number: 4818598Abstract: The present invention relates to absorbent structures in which hydrogel has improved ability to absorb salt-containing fluids due to inclusion within the absorbent structures of fibrous anion exchange materials. The absorbent structures of the present invention comprise hydrogel and fibrous anion exchange material (e.g., DEAE cellulose), and, optionally, fibrous cation exchange materials and/or conventional absorbent materials; said absorbent structures having an equilibrium pH of from about 5 to about 11. The present invention further relates to disposable absorbent products (e.g., diapers, incontinent pads, sanitary napkins) which comprise absorbent structures of the present invention.Type: GrantFiled: June 28, 1985Date of Patent: April 4, 1989Assignee: The Procter & Gamble CompanyInventor: Arthur Wong
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Patent number: 4813948Abstract: Microfiber microwebs are provided. The microfiber microwebs have relatively dense nuclei with individual fibers and/or fiber bundles protruding therefrom. The microfiber microwebs can be incorporated into nonwoven webs of blown microfibers, air-laid staple fibers, or wood pulp fibers as well as into shaped articles having porous covering materials. The microfiber microwebs are useful in sorbent, filtration, and thermal insulation materials. The microfiber microwebs are prepared by divellicating a microfiber web to form discrete particles of microfiber microwebs.Type: GrantFiled: September 1, 1987Date of Patent: March 21, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Thomas I. Insley
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Patent number: 4812343Abstract: Pultruded marking devices (29,42,45,48,50,55,57,58) made of fiber reinforcement materials (10,14,16,17) embedded in a cured polyester resin matrix that contains about 2% to 25% by weight of cellulose solid particulates. Unidirectional reinforcement materials (10) are the major portion of the reinforcement materials and form about 30% to 60% by weight of the total weight of the marking devices.Type: GrantFiled: January 27, 1988Date of Patent: March 14, 1989Assignee: W. H. Brady Co.Inventors: John H. Kiekhaefer, Jack E. Perko, Joseph S. Hetzer, Frank W. Harris
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Patent number: 4810552Abstract: A tension chord designed to be subjected to tensile forces in a predetermined direction made of a highly extensible hydraulically setting mass of low shrinkage and continuous, unidirectionally arranged fiber bundles is described.Type: GrantFiled: December 18, 1986Date of Patent: March 7, 1989Assignee: Heidelberger Zement AGInventor: Adolf Meyer
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Patent number: 4803117Abstract: Elastomeric melt-blown fibers comprising a copolymer of ethylene and at least one vinyl monomer selected from the group including vinyl ester monomers, unsaturated aliphatic monocarboxylic acids and alkyl esters of these monocarboxylic acids disclosed. Elastomeric nonwoven webs formed from such fibers are also disclosed.Type: GrantFiled: March 13, 1987Date of Patent: February 7, 1989Assignee: Kimberly-Clark CorporationInventor: Diego H. Daponte
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Patent number: 4801482Abstract: An elastic pad which is elastic in at least one direction, includes an elastic sheet having at least one nonelastic nonwoven web joined thereto at least at two areas. The nonelastic web is gathered between the two areas. The sheet may be formed from a polyetherester and the nonelastic nonwoven web may be a web of spunlaced hydraulically entangled polyester fibers. The nonelastic nonwoven web may also include rayon or wood pulp fibers.Type: GrantFiled: October 15, 1986Date of Patent: January 31, 1989Assignee: Kimberly-Clark CorporationInventors: Gary L. Goggans, Cherie H. Everhart, Stephen O. Chester, J. Eric Frost, Monica V. Ozbirn
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Patent number: 4797385Abstract: A heat-sensitive recording material having on a support a heat-sensitive recording layer which contains a colorless electron-donating dye precursor and an electron-accepting compound as main components, with heat-sensitive recording layer containing granules of starch or its derivative, which has a volume average granule diameter of from 5 to 30 microns, in a proportion of from 0.2 to 5 wt % based on the total weight of solids therein, thereby achieving enhancement of slippability at the recording layer surface without adversely affecting the density of printed characters.Type: GrantFiled: January 27, 1987Date of Patent: January 10, 1989Assignee: Fuji Photo Film Co., Ltd.Inventor: Akira Igarashi
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Patent number: 4791020Abstract: Composites are made from cellulose fibers dispersed in a matrix of polyethylene and an isocyanate and bonded thereto during subsequent extrusion and or molding. The isocyanate improves adhesion between the cellulose fibers and the polyethylene. The improved adhesion results in improved tensile properties in the composite.Type: GrantFiled: February 2, 1987Date of Patent: December 13, 1988Assignee: Novacor Chemicals Ltd.Inventor: Bohuslav V. Kokta
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Patent number: 4790966Abstract: A method for molding articles such as pallets from flake-like wood particles mixed with binder, the pallets housing a deck and integral molding legs. A loosely fitted mat of wood flakes is formed by depositing a first plurality of layers of wood flakes onto a supporting surface with a flake aligners provided for causing alignment of those flakes which will form legs of the pallet. A second plurality of layers are formed with a flake aligner provided for causing alignment of flakes which will form the legs of the pallet and in a direction transverse to the direction of alignment of the flakes of the first layers.Type: GrantFiled: June 30, 1986Date of Patent: December 13, 1988Assignee: Board of Control of Michigan Technological UniversityInventors: L. Bogue Sandberg, Bruce A. Haataja, Douglas C. Jurmu, Robert D. Palardy, Frank H. Story, William A. Yates
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Patent number: 4791449Abstract: A web having phosphor particles uniformly distributed on at least one outer surface of the web, the phosphor particles being substantially white or colorless under ambient room light illumination and which upon excitation by ultraviolet light phosphoresces to emit visible radiation having a wavelength between about 400 nanometers and about 500 nanometers for a detactable period after ultraviolet excitation.Type: GrantFiled: May 30, 1986Date of Patent: December 13, 1988Assignee: Xerox CorporationInventors: Geoffrey M. Foley, Robert W. Anderson