In Coating Or Impregnation Patents (Class 428/368)
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Patent number: 5468557Abstract: A ceramic insulated wire has a conductor core of copper or copper alloy, a stainless steel layer around the conductor core and a chromium oxide film (2A) around the stainless steel layer. The chromium oxide film (2A) is surrounded by an outer ceramic insulator formed by a vapor deposition method. Cladding the conductor core with stainless steel is done by inserting the core lengthwise into a stainless steel pipe, plastically working the resulting composite body to provide a desired size, and oxidizing the stainless steel which contains sufficient chromium for the formation of the chromium oxide film to have a thickness within the range of 10 nm to 1000 nm. The outer ceramic insulator formed by vapor deposition is made of Al.sub.2 O.sub.3, SiO.sub.2, AlN and Si.sub.3 N.sub.4 which provide an excellent heat resistance while the chromium oxide film substantially increases the bonding strength.Type: GrantFiled: February 18, 1993Date of Patent: November 21, 1995Assignee: Sumitomo Electric Industries, Ltd.Inventors: Masanobu Nishio, Kazuo Sawada, Shinji Inazawa, Kouichi Yamada
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Patent number: 5462780Abstract: Improved thermoplastic adhesive liquid coatings adapted for use as a primer coating for inground pipelines, which coatings include an amphipathic metal complexing reagent in an amount effective to provide protection against cathodic disbondment, the improvement being the bonding to the thermoplastic moiety of an anhydride in an amount sufficient to provide still further protection against degradative environmental forces; and novel protective pipewrap systems including same.Type: GrantFiled: February 22, 1994Date of Patent: October 31, 1995Assignee: The Kendall CompanyInventor: Mildred C. Richards
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Patent number: 5458935Abstract: The invention provides a thermoplastic polyurethane elastomer which contains a blend of polyurethane resins and is suitable for use in the form of tubing. The blend has a tensile strength of more than 7000 psi and an ultimate elongation greater than 200%. The blend contains about 50% to about 80% by weight of an elastomeric polyurethane resin having a hardness in the range of about 60 to 70 Shore D units. The blend additionally contains about 20% to about 50% of a relatively rigid polyurethane resin having a hardness of about 10 units more than the elastomeric resin. The invention also provides methods for using and methods for manufacturing tubing fabricated from the thermoplastic polyurethane elastomer. Preferred extrusion conditions are described.Type: GrantFiled: October 12, 1993Date of Patent: October 17, 1995Assignee: Abbott LaboratoriesInventor: Bernard G. Alzner
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Patent number: 5454559Abstract: An apparatus feed paper sheets to a photosensitive dram of an electronic copier, negatively charged toner adhering the dram. The apparatus incorporates a paper feed roller and a rubber member located adjacent the roller for supporting paper sheets in contacting relation to the roller. The robber member has a polymer, vulcanizer, vulcanization aid and filler; and at least one component selected from the group consisting of magnesium oxide, barium oxide, nylon short fibers, powder of nylon short fibers and nigrosine compound. The component is present in an amount of 1 to 100 parts by weight to 100 parts by weight of the polymer. The paper sheet becomes electrostatically charged negatively, when contacting the rubber member during sheet feeding by the roller, thus preventing electrostatic attraction between the paper approaching the dram and negatively charged toner on the dram.Type: GrantFiled: January 27, 1993Date of Patent: October 3, 1995Assignee: Sumio Gomu Kogyo Kabushiki KaishaInventors: Hirotoshi Murakami, Hitoshi Itani, Hiroaki Tanaka
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Patent number: 5455313Abstract: The present invention relates to a silicone rubber composition for fixing roll service. More specifically, the invention relates to a silicone rubber composition for fixing roll service that is easily molded into a fixing roll as used in devices such as electrophotographic copiers, facsimile machines, and laser printers and that yields a fixing roll with an excellent mechanical strength and excellent toner release properties.Type: GrantFiled: June 15, 1994Date of Patent: October 3, 1995Assignee: Dow Corning Toray Silicon Co., Ltd.Inventors: Hidetoshi Kurusu, Akito Nakamura, Yoshito Ushio
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Patent number: 5451439Abstract: Mixtures of styrene-isoprene block copolymer and ultralow density polyethylene are provided as moldable rubber substitutes. These mixtures may be used in the production of electrical lineman's gloves and other flexible items such as other types of gloves, tubing, balloons, condoms, toys, inflatable liners, baby nipples, and rubber bands.Type: GrantFiled: January 14, 1994Date of Patent: September 19, 1995Assignee: Electric Power Research Institute, Inc.Inventor: Donald M. Bigg
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Patent number: 5443873Abstract: There is disclosed an electrically conductive rubber roller for electrophotography which changes very little in electric resistance with changes in environment. This roller is used for charging and image transferring processes in copying machines and laser beam printers. The roller comprises a porous body of crosslinking silicone composition, containing at least a silica type filler, carbon black a foaming agent and siloxane polymer; the composition has an electric resistance of 10.sup.3 -10.sup.8.Type: GrantFiled: November 12, 1992Date of Patent: August 22, 1995Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Hitoshi Itani, Yuji Yamasaki, Hirotoshi Murakami
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Patent number: 5443905Abstract: A heat and oxidation resistant electrically conductive composite conductor has a core (1) made of copper or a copper alloy, an electrically conductive ceramics layer (2) around the core (1), and a nickel layer (3) on the exterior of the electrically conductive ceramics layer (2). Such a conductor is produced by coating the outer surface of the core copper alloy binder and covering the coated core with a nickel tape under an atmosphere of an inert gas or a reducing gas, welding the seam of the tape, clading the so formed conductor by a cladding die, and drawing the clad conductor. The composite conductor has a high conductivity which is not reduced even when the conductor is exposed to a high temperature operating condition.Type: GrantFiled: January 24, 1994Date of Patent: August 22, 1995Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuo Sawada, Shinji Inazawa, Kouichi Yamada
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Patent number: 5430075Abstract: Baked pencil leads in which a filler such as flaky graphite is oriented in a concentric tubular form in an outer peripheral portion of each lead and which has one or more layers spaced in a radial direction from the outer peripheral portion and comprising the filler oriented in the concentric tubular form between the central portion and the outer peripheral portion of each lead and in which the filler is at random or radially oriented in the other portions of each lead.The baked pencil leads can be obtained by the use of a plurality of concentric conical tubular straightening plates having the sectional area of a flow path continuously decreased toward a nozzle orifice, in extruding a kneaded material mainly comprising the filler and a binder.In the baked pencil leads, strength can be remarkably improved without lowering density, and thus these baked pencil leads are excellent in the balance between the strength and the density.Type: GrantFiled: September 8, 1993Date of Patent: July 4, 1995Assignee: Mitsubishi Pencil Kabushiki KaishaInventor: Hideo Odashima
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Patent number: 5429870Abstract: A fiber is coated with boron carbide by contacting the fiber with a reaction mixture of a boron source and a carbon source at a temperature of at least about 1050.degree. C. such that the boron source and carbon source react with each other to produce a boron carbide coating on the fiber. The fiber comprises aluminum oxide, SiC, or Si.sub.3 N.sub.4 and the boron carbide coating comprises up to about 40 atomic percent boron.Type: GrantFiled: December 17, 1992Date of Patent: July 4, 1995Assignee: United Technologies CorporationInventors: Michael A. Kmetz, John M. Laliberte, Steven L. Suib, Francis S. Galasso
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Patent number: 5427831Abstract: Laminates of low swell elastomer, non-elastomeric fluoropolymer, and elastomer provide an excellent combination of flexibility and fuel permeation resistance.Type: GrantFiled: June 2, 1994Date of Patent: June 27, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ronald D. Stevens
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Patent number: 5424104Abstract: Disclosed is a thermoplastic resin composition comprising(A) an aromatic polyamide comprisingdicarboxylic acid units comprising 50-100 mol % of units derived from terephthalic acid, and 0-50 mol % of units derived from an aromatic dicarboxylic acid other than terephthalic acid and/or an aliphatic-dicarboxylic acid having 4-20 carbon atoms, anddiamine units derived from an aliphatic diamine and/or an alicyclic diamine,said aromatic polyamide having an intrinsic viscosity of 0.5-3.0 dl/g as measured in conc. sulfuric acid at 30.degree. C. and a melting point of higher than 300.degree. C.,(B) a graft modified .alpha.-olefin polymer, and/or a graft modified aromatic vinyl hydrocarbon/conjugated diene copolymer or hydrogenated product thereof, and(C) an aliphatic polyamide,wherein said thermoplastic resin composition comprises 10-80 parts by weight of the graft modified .alpha.Type: GrantFiled: January 7, 1994Date of Patent: June 13, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yoshikatsu Amimoto, Fumitoshi Ikejiri, Sanehiro Yamamoto, Akinori Toyota, Katunari Nishimura, Masahiro Kanda, Tetsuo Kato
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Patent number: 5418023Abstract: A process and composition for sealing a flanged metal enclosure both physically and electromagnetically by a gasket comprising metal-plated microporous polytetrafluoroethylene in either sheet or tube form. The sheets may be coated by conductive elastomers and the tubes filled with conductive elastomers.Type: GrantFiled: September 23, 1991Date of Patent: May 23, 1995Assignee: W. L. Gore & Associates, Inc.Inventors: Raul Hernandez, James L. Manniso
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Patent number: 5413859Abstract: A thermal protection system arrangement and method of manufacture for a carbon-carbon nose tip of a re-entry space vehicle that is expected to encounter very high heat fluxes upon re-entry into the earth's atmosphere. The arrangement includes a carbon-carbon nose tip which has a first sublimatable material infiltrated into the outer portion of the nose tip for release of thermal energy to the environment during the high heat fluxes of re-entry. A second sublimatable material which sublimates at heat fluxes materially less than that of the first sublimatable material is infiltrated into the inner portion of the nose tip so that the nose tip releases energy to the environment and erodes in a controlled manner thereby maintaining the interior of the nose tip at a desired temperature.Type: GrantFiled: October 28, 1992Date of Patent: May 9, 1995Assignee: Lockhead CorporationInventors: William E. Black, Ebrahim M. Parekh
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Patent number: 5407715Abstract: An elastomeric composition is formed of at least two, and preferably three, S-EB-S elastomeric triblock copolymers having different solution viscosity/copolymer concentration relationships, and a sufficient amount of a mineral oil plasticizer to achieve excellent tactility with acceptable strength. To prepare articles such as medical film protective devices, the elastomeric composition is dissolved in a sufficient amount of a solvent to permit dip forming. A form having the shape of the desired product is dipped into the solution to build up a film of the elastomeric composition on the form. The dip-formed elastomeric films are free of pinholes and resistant to oxidative and ozone attack. The films are particularly suitable for use in products such as gloves, condoms, external catheters, catheter balloons, cuffs, dilatation balloons, instrument covers, and drains.Type: GrantFiled: October 23, 1991Date of Patent: April 18, 1995Assignee: Tactyl Technologies, Inc.Inventors: Douglas A. Buddenhagen, Norman R. Legge, Gunter Zscheuschler
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Patent number: 5407751Abstract: Multi-layer films having an outer sealant layer which readily delaminates from the adjacent sealant layer are disclosed. For retort applications, preferably one of the outer or adjacent sealant layers is comprised of a majority of ethylene moieties and the other of the outer or adjacent sealant layers is comprised of a majority of propylene moieties. The film is especially well-suited for use as a lidstock sealed to a container, such as a tray.Type: GrantFiled: April 1, 1992Date of Patent: April 18, 1995Assignee: American National Can CompanyInventors: Roger P. Genske, Roy A. Bubel
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Patent number: 5403666Abstract: The thermooxidative stability and thermomechanical properties of advanced composites which use high performance resin matrices such as polyimides and high strength carbon fibers may be improved by sizing the carbon fibers with uncapped or capped linear polyamideimides.The uncapped linear polyamideimides useful as carbon fiber sizings generally contain repeating units having the general formula: ##STR1## Wherein R.sub.2 =a trivalent organic radical and generally benzenetriyl;R.sub.3 =a divalent organic radical; andn=an integer sufficiently large to provide a strong, tough coating.Useful capped, linear polyamideimide oligomers may be formed by including end caps with an unsaturated functionality (Y) containing a residue selected from the group consisting of: ##STR2## wherein R.sub.1 =lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl, halogen, or mixtures thereof;j=0, 1, or 2;i=1 or 2;G=--CH.sub.2 --, --O--, --S--, --SO.sub.2 --, --SO--, --CO--, --CHR--, or --CR.sub.Type: GrantFiled: June 21, 1993Date of Patent: April 4, 1995Assignee: The Boeing CompanyInventors: Hyman R. Lubowitz, Clyde H. Sheppard, Ronald R. Stephenson
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Patent number: 5399400Abstract: A thin walled article such as a surgical glove is formed from a blend of an elastomer as natural rubber and polytetrafluoroethylene.Type: GrantFiled: August 13, 1992Date of Patent: March 21, 1995Assignee: Smith & Nephew, Inc.Inventors: Jeffery G. Nile, Stanley J. Gromelski
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Patent number: 5397611Abstract: A thin, tacky, non-pourable film of incompatible in situ-expandable thermoplastic particles and thermosettable matrix resin that contains an essentially uniform density and thickness across the breadth of the film. The in situ-expandable mass is not pourable yet can be easily dispensed in a uniform manner within a mold and thereafter expanded to the dimensions of the mold. Composites and reinforced compositions, as well as methods of molding, are disclosed.Type: GrantFiled: August 10, 1993Date of Patent: March 14, 1995Assignee: The Dexter CorporationInventor: Raymond S. Wong
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Patent number: 5391428Abstract: A shaped ceramic-ceramic composite article comprising a ceramic monolith, preferably in the shape of a hollow tube, having a ceramic fiber matrix thereover, coated with carbonaceous material and overcoated with silicon carbide.Type: GrantFiled: February 16, 1994Date of Patent: February 21, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mark D. Zender
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Patent number: 5385982Abstract: Refrigerator and freezer liners are molded from rubber modified graft copolymers of acrylonitrile and methyl acrylate. These polymers comprise 14 to 30 percent by weight of a butadiene-acrylonitrile elastomer rubber. Further these polymers show excellent impact strength at low temperatures and are resistant to solvents used as blowing agents for refrigerator and freezer insulation.Type: GrantFiled: January 21, 1994Date of Patent: January 31, 1995Assignee: The Standard Oil CompanyInventor: Joseph P. McCaul
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Patent number: 5380571Abstract: A hose including at least an inner tube, a reinforcing layer and an outer cover, wherein the inner tube and the outer cover are individually composed of a thermoplastic elastomer comprising a vulcanized rubber dispersed in a thermoplastic resin, M.sub.p defined by the following formula (I) is not greater than 70 kgf/cm.sup.2, and flexural rigidity of the hose at a bending radius four times the outer diameter of the hose is 1 kgf or less: ##EQU1## wherein t.sub.1 and t.sub.2 are the thickness of the inner tube and the outer tube (mm), respectively, and M.sub.1 and M.sub.2 are stress (kgf/cm.sup.2) at 25% elongation of the inner tube and the outer cover, respectively.Type: GrantFiled: June 17, 1993Date of Patent: January 10, 1995Assignee: The Yokohama Rubber Co., Ltd.Inventors: Osamu Ozawa, Hiroyuki Miyade, Tetsu Kitami
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Patent number: 5372985Abstract: A delaminating coating for use in a thermal transfer system is provided that possesses both delaminating properties and antistatic properties. This delaminating coating can be used on a donor sheet or an intermediate carrying sheet of a thermal retransfer system. The preferred delaminating/antistatic coating is formed from a composition of a vanadium oxide colloidal dispersion.Type: GrantFiled: February 9, 1993Date of Patent: December 13, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jeffrey C. Chang, Eric D. Morrison
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Patent number: 5372868Abstract: Fiber reinforced glass or glass-ceramic matrix composite articles are described which comprise spaced apart face sheets connected by ribs which extend between the face sheets. The fibers in the ribs are interwoven with the fibers in the face sheets, thereby producing a structure having high shear strength.Type: GrantFiled: September 30, 1992Date of Patent: December 13, 1994Assignee: United Technologies CorporationInventors: Karl M. Prewo, Otis Y. Chen, Martin J. Gibler, Glenn M. Allen
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Patent number: 5370915Abstract: A rubber-rubber bonded composite structure is made up of one unvulcanized preform formed from a rubber comprising hydrogenated acrylonitrile-butadiene rubber, either a combination of methacrylic acid and zinc oxide or zinc methacrylate, and an organic peroxide and another unvulcanized preform formed from a rubber composition containing a rubber in common use both preforms having been laminated together into an integrally bonded structure by vulcanization. The resulting structure exhibits good rubber-to-rubber adhesion.Type: GrantFiled: January 7, 1993Date of Patent: December 6, 1994Assignee: The Yokohama Rubber Co., Ltd.Inventor: Hiroshi Hirakawa
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Patent number: 5364697Abstract: A silicone composition is formed as a system including: a silicone compound, reactive group-containing modified silicic acid powder of which surface has been modified with an alkylsilane, a hexamethyldisilazane, a dimethylsilicone oil, or a mixture thereof, and an unsaturated group-containing silane compound; and inorganic fine powder carrying a surfactant. The silicone compound is preferably an addition reaction-type silicone rubber prepared from a dimethyl polysiloxane having a vinyl group, a methylhydrogenpolysiloxane and a platinum-based catalyst. The silicone composition is heat-cured to provide an elastic revolution body which is suitably used to constitute one or both of a fixing roller and a mating pressure roller in a roller fixing device for electrophotography.Type: GrantFiled: August 5, 1992Date of Patent: November 15, 1994Assignee: Canon Kabushiki KaishaInventor: Toshiyuki Miyabayashi
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Patent number: 5362533Abstract: A rubber composition including (i) a partially hydrogenated unsaturated nitrile-conjugated diene copolymer having an iodine value not larger than 120, (ii) an ethylene-propylene copolymer and (iii) a material selected from an ethylene-vinyl acetate copolymer, an acrylic rubber and a halogenated butyl rubber. The rubber composition prodides a vulcanized rubber having an improved constant-elongation fatigue performance, as well as balanced thermal resistance, oil resistance and other properties.Type: GrantFiled: February 5, 1993Date of Patent: November 8, 1994Assignee: Nippon Zeon Co., Ltd.Inventors: Hideo Fukuda, Hideyoshi Shimoda
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Patent number: 5362530Abstract: A composite hose is disclosed which is constructed essentially with an inner tube and an outer cover, the inner tube being formed from a composition comprised of a specified polymer alloy of a selected class of polyamide resins and acrylic rubbers and the outer cover from a composition comprised of a specified thermoplastic elastomer of a selected class of polyolefin resins and ethylene-propylene-diene rubbers and butyl-based rubber. Impermeability is greatly improved with respect to refrigerant gases and fuel oils.Type: GrantFiled: December 9, 1993Date of Patent: November 8, 1994Assignee: The Yokohama Rubber Co., Ltd.Inventors: Tetsu Kitami, Osamu Ozawa, Jun Mito
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Patent number: 5356681Abstract: A multi-layer rubber hose in which a fluorinated rubber (FKM) layer and a nitrile rubber (NBR) layer adjacent thereto have been vulcanization-adhered to each other. The FKM layer is formed from the vulcanizate of an FKM compound containing a ternary FKM as a polymer component. The vulcanization system is an organic polyol system and a quaternary ammonium salt, and the vulcanization induction time (T.sub.10) satisfies the following equation, 4 minutes .ltoreq.T.sub.10 +determined vulcanization temperature -170.degree. C.) minutes/10.degree. C..ltoreq.7 minutes. The NBR layer is formed from the vulcanizate of the NBR compound, and the NBR comound is a stock rubber into which a functional group having an active hydrogen has been introduced. The vulcanization system is an oragnic peroxide system. The multi-layer rubber hose of the presnt invention is suitable as a fuel hose for cars and has a high resistance to gasohol.Type: GrantFiled: April 5, 1993Date of Patent: October 18, 1994Assignee: Toyoda Gosei Co., Ltd.Inventors: Masayoshi Ichikawa, Tomoaki Okita
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Patent number: 5354612Abstract: An addition reaction-type dimethylsilicone composition, including a diorganopolysiloxane containing a reactive vinyl group; an organopolysiloxane containing an active hydrogen atom; and silicic acid fine powder of which surface has been treated with a fluoroalkylsilane, an alkylsilane compound, a fluorosilicone oil, a dimethylsilicone oil, or a mixture thereof, and a silane compound containing an unsaturated group having a reactivity to the organopolysiloxane containing an active hydrogen atom.Type: GrantFiled: July 17, 1989Date of Patent: October 11, 1994Assignee: Canon Kabushiki KaishaInventor: Toshiyuki Miyabayashi
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Patent number: 5354615Abstract: The subject invention relates to a coated reinforcement material comprising a SiC-based reinforcement having a rare earth boride coating preferably of the general formula:R.sub.x B.sub.1-xwhereinR is selected from the group consisting of Y, Sc, Gd, Tb, Dy, Ho,Er and combinations thereof; andx is from about 0.05 to about 0.66.The invention further relates to a high strength, high temperature performance composite comprising a SiC-based reinforcement material having a coating comprising a rare earth boride, said coated reinforcement material disposed in a metal matrix material.Type: GrantFiled: June 27, 1990Date of Patent: October 11, 1994Assignee: The Carborundum CompanyInventors: Michael A. Tenhover, Dorothy B. Lukco
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Patent number: 5348779Abstract: A refrigerant transporting hose having a laminar structure including an inner tube consisting of at least one layer, an outer tube disposed radially outwardly of and coaxially with the inner tube, and a reinforcing fiber layer interposed between the inner and outer tubes. The inner tube includes a resin layer formed of a resin composition which consists of a blend of modified polyolefin and polyamide resin, and 1-10% by weight of .epsilon.-caprolactam. A proportion by weight of the modified polyolefin to the polyamide resin is selected within a range between 40/60 and 10/90. The hose may have a sealing layer formed on the inner surface of the inner tube. The sealing layer consists of a chlorinated elastomer containing a dispersion of an acid receptive agent. Alternately, the sealing layer may be provided on the outer surface of a hose connector nipple.Type: GrantFiled: August 6, 1993Date of Patent: September 20, 1994Assignee: Tokai Rubber Industries, Ltd.Inventor: Ichiro Igarashi
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Patent number: 5348777Abstract: The present invention provides a pipe-shaped structural member made of fiber reinforced plastics or fiber reinforced rubber utilizing the mechanical property of the material as an anisotropic material. Since the angle of the fibers and/or direction of orientation are made partially different in the circumferential direction of the structural member, and moreover, since the part where the angle of fibers and/or direction of orientation are made partially different is at least a part in the thicknesswise direction of the circumferential part, the pipe-shaped structural member shows a peculiar style of deformation, and is applicable to a variety of industrial fields.Type: GrantFiled: April 29, 1993Date of Patent: September 20, 1994Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Masahide Oonuki, Tetsuo Yamaguchi, Akihiro Nakahara, Mitsunori Miki
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Patent number: 5346731Abstract: A fiber-reinforced rubber article has a rubber body portion with a fiber reinforcement embedded therein. The fiber reinforcement includes a plurality of tubular braided cords braided by yarns. Each of the tubular braided cords is braided by more than three yarns at a braid angle in a range between 10.degree. and 35.degree., wherein said braid angle is an angle between a yarn of the tubular braided cord and the axial line of the tubular braided cord. Each tubular braided cord also has a fistulous center hole defined by the tubular braided cord.Type: GrantFiled: July 11, 1991Date of Patent: September 13, 1994Assignee: Bando Chemical Industries, Ltd.Inventor: Yasuyuki Nakanishi
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Patent number: 5344678Abstract: A shaft sleeve is made of ceramics and provided in confrontation with a stationary sliding member in a sliding bearing or plain bearing. The shaft sleeve made of ceramics comprises a cylindrical body made of ceramics and having a circular outer surface and a circular inner surface, and an elastic member molded on the inner surface of the cylindrical body and being formed with an inner opening having a shape corresponding to the cross section of a shaft. The shaft sleeve is usable under high temperature conditions and with liquids containing much slurry such as, for example, as a shaft sleeve of a pump.Type: GrantFiled: December 20, 1991Date of Patent: September 6, 1994Assignee: Ebara CorporationInventors: Ken-ichi Kajiwara, Kikuichi Mori
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Patent number: 5344709Abstract: A silicon carbide fiber having low specific electric resistance and excellent mechanical properties and a method for manufacturing the fiber.The silicon carbide fiber is characterized in that an amorphous carbon film is formed on the surface thereof. The fiber is manufactured by heating an antimelt-treated polycarbosilane fiber at a temperature not exceeding 1000.degree. C. in an inert gas atmosphere followed by heating at a temperature of greater than 1000.degree. C. and up to 1500.degree. C. in an atmosphere of a mixture of hydrocarbon gas and inert gas.Type: GrantFiled: May 14, 1992Date of Patent: September 6, 1994Assignee: Nippon Carbon Co., Ltd.Inventors: Atsuya Tokutomi, Hiroshi Ichikawa, Kenji Ushikoshi, Hiroshi Yamauchi
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Patent number: 5336539Abstract: The invention provides a fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer, characterized in that the base cushion layer has nickel oxide particles dispersed therein in a concentration of from 20 to 40 percent of the total volume of the base cushion layer.The base cushion layer of such a fuser roll has been unexpectedly found to exhibit only minimal weight loss, creep, and changes in hardness, over time, when subjected to conditions of elevated temperature and cyclic stress.Type: GrantFiled: November 29, 1993Date of Patent: August 9, 1994Assignee: Eastman Kodak CompanyInventor: John J. Fitzgerald
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Patent number: 5320888Abstract: Laminates of fluoroelastomer, non-elastomeric fluoropolymer and non-fluorinated elastomer provide an excellent combination of flexibility and permeability resistance.Type: GrantFiled: November 12, 1993Date of Patent: June 14, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ronald D. Stevens
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Patent number: 5316857Abstract: A sheet material in the form of a transparent film, paper sheets, or the like, is made machine visible or recognizable by recognition enhancing elements. These elements are of such a nature that they are machine readable, e.g. by optical, electrical, or magnetic sensors to increase the machine visibility of any slivers that may have remained in and/or on a prepreg or stack of prepregs. The signals sensed by photosensitive and/or magnetic and/or electric sensors are so processed that an alarm is provided when a sliver or remnant of the sheet material has been detected, and so that the location of such a sliver may be indicated.Type: GrantFiled: December 18, 1991Date of Patent: May 31, 1994Assignee: Deutsche Aerospace Airbus GmbHInventor: Reinhard Spiegel
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Patent number: 5312662Abstract: An electrically conductive roll including (a) a cylindrical core body, (b) an electrically conductive, resilient layer located radially outwardly of the core body, the resilient layer containing a softening agent, (c) a preventive layer located radially outwardly of the resilient layer, the softening agent being prevented from spreading by the preventive layer, the preventive layer being formed of N-methoxymethylated nylon as a major constituent thereof, and containing an electrically conductive material, and (d) a resistance adjusting layer located radially outwardly of the preventive layer, the adjusting layer being formed of epichlorohydrin-ethylene oxide copolymer rubber as a major constituent thereof, the core body, resilient layer, preventive layer and adjusting layer constituting an integral cylindrical body.Type: GrantFiled: December 18, 1991Date of Patent: May 17, 1994Assignee: Tokai Rubber Industries, Ltd.Inventors: Yuji Ohta, Masaaki Inubushi, Hiroyasu Kato
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Patent number: 5306565Abstract: A composite ceramic structure which does not fail catastrophically and thus is useful as a ceramic rolling contact bearing assembly is disclosed. The structure is a ceramic monolith bonded through an interlayer to a fiber-reinforced ceramic body. The structure is useful at elevated temperatures.Type: GrantFiled: September 18, 1990Date of Patent: April 26, 1994Assignee: Norton CompanyInventors: Normand D. Corbin, Brad J. Miller, Kazimierz Sawicki, John W. Lucek, James G. Hannoosh
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Pressurizable thermoplastic container having an exterior polyurethane layer and its method of making
Patent number: 5300334Abstract: Pressurizable thermoplastic containers, such as those made from polyethylene terephthalate containing a polyurethane layer on the exterior surface thereof are disclosed. The polyurethane layer which is typically applied by a coating process provides the bottle with resistance to stress cracking. The containers are useful as refillable bottles for carbonated beverages which have a tendency to stress crack.Type: GrantFiled: December 16, 1992Date of Patent: April 5, 1994Assignee: PPG Industries, Inc.Inventors: Ken W. Niederst, John R. Zern, Jerome A. Seiner -
Patent number: 5298303Abstract: A coated fabric comprising a fabric substrate and a coating thereupon, said coating comprising a plurality of layers wherein at least one of the layers comprises a polyester polyurethane having a Shore A hardness of at least 90 durometer, or a linear polyurethane elastomer formed from a polyol; a diisocyanate compound; a first extender component having a molecular weight of below about 500; and a second extender component; wherein the diisocyanate compound is initially reacted with the first extender component in a molar ratio of above 2:1 to form a modified diisocyanate component having a functionality of about 2 prior to reaction with the other components to provide relatively low temperature processing properties to the composition. Preferably, different layers of these polyurethanes are included.Type: GrantFiled: November 6, 1991Date of Patent: March 29, 1994Assignee: Reeves Brothers, Inc.Inventors: Richard C. Kerr, John R. Damewood, Jill R. Menzel, Eddie L. Jarvis, Bert A. Ross
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Patent number: 5294489Abstract: A protective coating for a reinforcement phase exposed to molten silicon or silicon alloy infiltrant comprises, an inner layer material resistant to reaction with the molten infiltrant, an interlayer of a reactive material that reacts with the infiltrant to form compounds having a melting temperature greater than the infiltrant, and an outer layer material resistant to reaction with the molten infiltrant. Materials resistant to reaction with molten silicon are a metal carbide from the group consisting of carbides of titanium, hafnium, zirconium, and tantalum; a metal nitride from the group consisting of nitrides of boron, silicon, aluminum, titanium, zirconium, hafnium, niobium, and tantalum; a metal boride from the group consisting of borides of titanium, zirconium, hafnium, silicon, and aluminum, or combinations thereof.Type: GrantFiled: April 2, 1992Date of Patent: March 15, 1994Assignee: General Electric CompanyInventors: Krishan L. Luthra, Milivoj K. Brun, Gregory S. Corman
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Patent number: 5292590Abstract: An innerliner for tubeless tires is comprised of at least one barrier layer such as poly(vinylidene chloride) or ethylene--vinyl alcohol copolymer film with each barrier layer sandwiched between two layers of an elastomeric material adhering to the rubber stock employed in the carcass of the tire. The innerliner has the advantage of imparting equal or better air retention properties to the tire with a substantial reduction in the thickness and weight relative to conventional halobutyl rubber innerliners.Type: GrantFiled: July 24, 1992Date of Patent: March 8, 1994Assignee: Hercules IncorporatedInventors: Kuang F. Lin, Daniel W. Klosiewicz, Gregory I. Brodsky
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Patent number: 5290624Abstract: A laminate comprising (a) a carrier having a heat conductivity of at least 10 W/mK and a thickness of 10 to 100 .mu.m, and (b) a dielectric adhesive layer which is applied to at least one surface of said substrate and which contains a heat-conductive filler and has a thickness of 5 to 500 .mu.m and a heat conductivity of 1 W/mK. The flexible laminate, or a dielectric and self-supporting adhesive film which contains a heat-conductive filler and has a heat conductivity of at least 1 W/mK, is suitable for removing heat from leadframes which have electrically insulated contact surfaces for electrical and electronic components and which are encapsulated with a synthetic resin moulding material, typically dual-in-line plastic packages, by bonding the rear sides of the contact surfaces to the leads.Type: GrantFiled: April 22, 1992Date of Patent: March 1, 1994Assignee: Ciba-Geigy CorporationInventor: Patrice Bujard
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Patent number: 5286807Abstract: Polyoxymethylene compositions having 5-15 wt. thermoplastic polyurethane; where the polyurethane has a soft segment glass transition of lower than 0.degree. C., the polyoxymethylene has a molecular weight of 20,000-100,000, and the polyurethane is dispersed in the polyoxymethylene as discrete particles show extraordinary impact resistance as measured by Gardner impact.Type: GrantFiled: July 10, 1990Date of Patent: February 15, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edmund A. Flexman, Jr.
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Patent number: 5279874Abstract: An ethylene-propylene rubber composition vulcanizable with sulfur in which the rubber component totally or mainly composed of EPDM is incorporated with a zinc oxide, a carbon black, and other ingredients. The EPDM has an iodine value of 20 to 35 and an active zinc oxide is incorporated therein as the zinc oxide in an amount of 1 to 10 PHR. Even with a sulfur vulcanization system, this ethylene-propylene rubber composition is permitted to have compression set resistance equivalent to that of conventional SBR and is improved in heat resistance as well.Type: GrantFiled: October 30, 1991Date of Patent: January 18, 1994Assignee: Toyoda Gosei Co., Ltd.Inventors: Masayoshi Ichikawa, Kiyomitsu Terashima
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Patent number: 5277864Abstract: Toughened semi-crystalline thermoplastic polyester molding compositions consisting essentially of a polyester resin and an ionomer of ethylene, a softening comonomer and unsaturated carboxylic acid, such as ethylene/n-butyl acrylate/methacrylic acid.Type: GrantFiled: April 10, 1992Date of Patent: January 11, 1994Assignee: E. I. du Pont de Nemours and CompanyInventor: Philip S. Blatz
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Patent number: RE34552Abstract: A plastic preform from which a plastic container is blow molded. The preform replaces a three layer preform by providing a preform which is of a five layer construction in the base forming portion thereof and wherein a secondary material which forms the core layer of the three layer preform construction is divided into an inner intermediate layer and an outer intermediate layer by a third injection of material. The third injected material is preferably the same material as the primary material which is first injected. This results in the reduction of the cost of the preform and also provides remaining in the injection nozzle a quantity of the last injected material which is the same as the first injected material for the following preform in the same preform injection mold cavity.Type: GrantFiled: October 7, 1991Date of Patent: February 22, 1994Assignee: Continental PET Technologies, Inc.Inventors: Suppayan M. Krishnakumar, Thomas E. Nahill, Steven L. Schmidt, Wayne N. Collette