With Rubber Or Elastomer Cover Patents (Class 492/56)
-
Patent number: 6146320Abstract: A conductive roll available at low cost and superior both in moldability and compression set and having small dispersion or fluctuation in electrical resistance includes a shaft and a base rubber layer formed on a peripheral surface of the shaft, the base rubber layer formed of a composition containing the following components (A) to (C): (A) a liquid polymer having a structural unit (.alpha.) derived from at least one of butadiene and isoprene and having an alkenyl group in a side chain thereof; (B) a hydrosilylation crosslinking agent; and (C) a hydrosilylation catalyst. In the conductive roll the alkenyl group of the structural unit (.alpha.Type: GrantFiled: July 28, 1999Date of Patent: November 14, 2000Assignee: Tokai Rubber Industries, Ltd.Inventors: Hitoshi Yoshikawa, Shoji Arimura, Kunio Ito, Sumio Oinuma, Akihiko Kaji, Kenichi Ohkuwa, Kazuhiro Takeda, Satoshi Suzuki
-
Patent number: 6148170Abstract: A fusing roller for use in image transfer devices, wherein toner is fixed by heat and pressure to a receiver by a pair of rollers. The fusing roller has a core, a base layer of conductive silicone rubber and a release layer consisting of a silicone rubber compound. The particular surface material offers excellent toner release and continuously renews its surface.Type: GrantFiled: September 21, 1999Date of Patent: November 14, 2000Assignee: Illbruck GmbHInventors: Michael McMindes, James Montgomery
-
Patent number: 6142922Abstract: A conductive roll to be used as a developing roll, a charging roll, a transfer roll or the like in an electrophotographic apparatus such as a copying machine, a printer or a facsimile, of the present invention comprises a base rubber layer formed on a peripheral surface of a shaft, an intermediate layer formed on a peripheral surface of the base rubber layer, and a surface layer formed on a peripheral surface of the intermediate layer, the surface layer being composed of a resin composition comprising:(A) a silicone-grafted acrylic polymer which comprises repeating units represented by the following general formula (1), wherein an acrylic polymer portion of the silicone-grafted acrylic polymer exclusive of a structural portion derived from a siloxane has a glass-transition temperature of -35 to 30.degree. C.:--(Y).sub.k -- --(Z).sub.Type: GrantFiled: August 31, 1999Date of Patent: November 7, 2000Assignee: Tokai Rubber Industries, Ltd.Inventors: Hitoshi Yoshikawa, Shoji Arimura, Akihiko Kaji, Kenichi Ohkuwa
-
Patent number: 6143386Abstract: The invention relates to a form for the rotary printing, coating or imprinting of web-shaped materials and a method of producing the form wherein an elastomer layer is applied onto a carrier with a cylindrical surface area with the layer machined and engraved at the outer circumference to result in a cylindrical shape after curing. The form according to the invention is characterized in that the elastomer layer is formed of cold cure material. The engraving of the elastomer layer preferably is attained by laser engraving.Type: GrantFiled: June 15, 1998Date of Patent: November 7, 2000Inventors: Heinz Lorig, Jorg Richard, Franz-Josef Giesen, Klaus Langerbeins, Alfred Ernst Link
-
Patent number: 6141873Abstract: A micro-compliant roll having a PTFE top layer on a silicone rubber baselayer bonded to a metallic insert is provided. The roll with PTFE top coat is heated under pressure to a temperature below the PTFE crystalline melting point and quenched to provide a compliant top layer having crystallinity of no more than about 70 percent. The PTFE top layer is applied by adhering a fibrillated PTFE membrane to a silicone rubber baselayer using a primer of a blend of silane and a polyamide resin, or wrapping the PTFE film about an insert with end spiders placed in a sleeve mold and liquid or flowable elastomer is injected into the space between the insert and PTFE membrane.Type: GrantFiled: February 4, 1998Date of Patent: November 7, 2000Assignee: Ames Rubber CorporationInventors: Chris F. DelRosario, Melvin F. Luke, John Navarra, Daniel Schmitz, Dennis M. Howard, Timothy D. Marvil
-
Patent number: 6129652Abstract: A calender roll including a cylindrical base body, a cover composed of elastic plastic material, and a support cylinder composed of a light metal that carries the cover and is supported by the base body. The support cylinder may include a plurality of coolant conduits.Type: GrantFiled: August 13, 1997Date of Patent: October 10, 2000Assignee: Voith Sulzer Finishing GmbHInventors: Reinhard Wenzel, Peter Dornfeld
-
Patent number: 6127041Abstract: A fuser member having a support metallic core and a layer of material formed over the metallic core, the layer including composite material, including a silicone T-resin; a crosslinked poly(dialkylsiloxane) incorporating an oxide, wherein the poly(dialkylsiloxane) has a weight average molecular weight before crosslinking of about 5,000 to 80,000; and a silane crosslinking agent.Type: GrantFiled: December 3, 1998Date of Patent: October 3, 2000Assignee: Eastman Kodak CompanyInventors: Joseph M. Szostek, Jiann H. Chen, Stephen V. Davis, Charles E. Hewitt
-
Patent number: 6122473Abstract: A developer carrying member for carrying a developer is includes a substrate and a resin coat layer which is formed on the surface of the substrate and contains a binder resin and a conductive fine powder. The binder resin is composed of a copolymer having a monomeric unit of a methyl methacrylate monomer (M) and a monomeric unit of a nitrogen-containing vinyl monomer (N). A copolymerization molar ratio of the methyl methacrylate monomer (M) to the nitrogen-containing vinyl monomer (N) in the copolymer fulfills the following condition: M:N=4:1 to 999:1. The binder resin has a weight-average molecular weight (Mw) of from 3,000 to 50,000.Type: GrantFiled: March 31, 1998Date of Patent: September 19, 2000Assignee: Canon Kabushiki KaishaInventors: Yasuhide Goseki, Masayoshi Shimamura, Kenji Fujishima, Michiko Orihara, Kazunori Saiki, Satoshi Otake, Naoki Okamoto
-
Patent number: 6117557Abstract: A semiconductor developer roller having a conductive shaft and an outer member of caprolactone-ester-based polyurethane loaded with ferric chloride. The members have low environmental sensitivity and good electrical stability.Type: GrantFiled: April 19, 1995Date of Patent: September 12, 2000Assignee: Lexmark International, Inc.Inventors: Johnny Dale Massie, II, Jean Marie Massie, Donald Wayne Stafford, Peter Eric Wallin
-
Patent number: 6114041Abstract: A fuser member having improved toner offset release and wear characteristics. The outermost layer comprises a fluoroelastomer with thermally conductive fillers which are surface treated with a coupling agent that is interactive with the fluoroelastomer and with a release agent which may, optionally, be used on the surface of the fluoroelastomer layer.Type: GrantFiled: October 31, 1997Date of Patent: September 5, 2000Assignee: Eastman Kodak CompanyInventors: Biao Tan, Jiann H. Chen, Tonya D. Binga, Douglas B. Wilkins
-
Patent number: 6101694Abstract: The method for removing used elastomeric covers from rollers is performed by approaching a rotating cutter head having a number of cutting tools mounted on an indexable insert holder from one end of the cover of the rotating roller to close to the roller core, and moving said cutter head along the rotating roller to the other end of the cover, the circumferential velocities of the cutting tools being from 15 to 70 m/s, preferably from 40 to 50 m/s. For elastomers of up to about 90 Shore A, annular cutting tools are used.Type: GrantFiled: May 8, 1997Date of Patent: August 15, 2000Assignee: Felix Bottcher GmbH & Co.Inventor: Axel Frohwein
-
Patent number: 6083588Abstract: A heat-resistant sheet is provided between a fusing roller and a pressing member made of a resilient material. The heat-resistant sheet is composed of a glass fiber substrate coated with or impregnating a fluororesin having good mold lubrication and heat-resistance, such as PFA and PTFE. A paper having a pre-fused toner image is carried through a section between the fusing roller and heat-resistant sheet. Accordingly, wear or separation of the heat-resistant sheet caused by friction with the fusing roller can be prevented, thereby improving durability of the heat-resistant sheet.Type: GrantFiled: January 3, 1996Date of Patent: July 4, 2000Assignee: Sharp Kabushiki KaishaInventors: Toshiaki Kagawa, Toshihiro Tamura, Shogo Yokota, Tatuya Shinkawa, Hiroyuki Sawai
-
Patent number: 6078778Abstract: This invention provides an improved electrifying member capable of that can have an electric voltage applied to it to electrify a surface of another member which is to be electrified. In particular, said electrifying member comprises an electrically conductive elastomer obtained by vulcanizing a mixture containing a nitryl rubber, a liquid nitryl rubber, and a non-polar polymer. Therefore, the invention provides an improved electrophotograph apparatus employing the above improved electrifying member, which has a relatively uniform electric resistance and uniform electrifying characteristics, has almost no change in its characteristics even if it has been used for a long time period, and is non-viscous and thus will not stick to a photosensitive body (to be electrified) so that it will not contaminate the photosensitive body.Type: GrantFiled: September 4, 1998Date of Patent: June 20, 2000Assignee: Canon Kabushiki KaishaInventors: Jun Murata, Yoshiaki Nishimura, Nobutoshi Hayashi
-
Patent number: 6073548Abstract: Roll machine and process for forming a roll machine. The roll machine includes a roll having a roll body and an elastic layer located on a periphery of the roll body, and a mating roll. At least one roll nip is formed between the roll and the mating roll, and the elastic layer has a radial thickness less than approximately 8 mm. The process includes covering the roll body with an elastic layer having a radial thickness less than approximately 8 mm and pressing the roll and the mating roll together to form a press nip.Type: GrantFiled: March 11, 1998Date of Patent: June 13, 2000Assignee: Voith Sulzer Finishing GmbHInventors: Franz Kayser, Rolf van Haag
-
Patent number: 6067434Abstract: A developing roller supports a one-component developer on a surface thereof in the form of a thin layer, and is brought in contact with or in proximity to an image forming body in such a state, to supply the developer on a surface of the image forming body, thereby allowing a visible image to be formed on the surface of the image forming body. The developing roller includes: an elastic layer having an ionically conductivity whose surface is imparted with a resin component having a high resistivity. Thus, if R1 is a resistance of the roller in a stationary state and R2 is a resistance of the roller in a rotational state, a relationship of R1>R2 is established. With this developing roller, it is possible to obtain a high quality image and a high gradient.Type: GrantFiled: June 29, 1998Date of Patent: May 23, 2000Assignee: Bridgestone CorporationInventors: Koji Takagi, Yoshio Takizawa, Tokuo Okada, Hiroshi Kaneda, Koichi Iwami
-
Patent number: 6059095Abstract: A conveying roller includes a shaft and a body member placed on a periphery of the shaft. The body member is provided with an inner layer placed on the periphery of the shaft and an outer layer placed on a periphery of the inner layer. The inner layer is made of a thermoplastic resin having a predetermined volume reduction rate. The outer layer is made of an elastomer. The conveying roller has an increased adhesion between the shaft and the body member.Type: GrantFiled: February 11, 1998Date of Patent: May 9, 2000Assignee: Noritsu Koki Co., Ltd.Inventor: Hideki Tsuji
-
Patent number: 6044963Abstract: A roller body having a shaft formed from a first thermoplastic material and defining at least one roller. The shaft is a single component injection-molded shaft. A casing at least partially encases the roller and is formed from a second thermoplastic material different from the first thermoplastic material. The casing is bonded to the roller by an injection-molding process.Type: GrantFiled: July 10, 1997Date of Patent: April 4, 2000Assignee: Sarnatech Spritzguss AGInventors: Stephan Lerch, Thomas Rutishauser
-
Patent number: 6042946Abstract: A charge roller made from a mixture of urethane, polybutadiene, a polyether diol, ferric chloride, and antimony doped tin oxide with or without carbon black. The roller has a very high outer surface electrical resistance from baking the roller to oxidize the polybutadiene. The charge roller is achieved at low production cost and functions well even with charging by a DC potential with an AC overlay.Type: GrantFiled: July 29, 1998Date of Patent: March 28, 2000Assignee: Lexmark International, Inc.Inventors: Johnny Dale Massie, II, Angela Rachele Perruzza, Edward Wayne Weidert
-
Patent number: 6039840Abstract: A paper machine roll, in particular a roll for a supercalender, which includes a frame and a polymer coating on the frame. The deformability of the polymer coating on the roll increases within a certain axial distance from the middle area of the roll toward the ends of the roll in order to compensate for the deformation state of the end areas of the roll frame, which deformation state is uneven when the roll is loaded.Type: GrantFiled: December 16, 1998Date of Patent: March 21, 2000Assignee: Valmet CorporationInventors: Pauli Kytonen, Juha Koriseva, Erkki Leinonen
-
Patent number: 6035780Abstract: A process including:forming a first mixture of a first fluoroelastomer, and a first polymeric siloxane containing free radical reactive functional groups; andforming a second mixture of the resulting product with a mixture of a second fluoroelastomer and a second polysiloxane compound, and wherein the resulting product of the dissimilar polymeric materials is a phase compatible blend.The phase compatible blend is useful as a component of electrostatographic and liquid ink printing machines, including long-life fuser rolls, backing rolls, transfer and transfuse belts and rolls and bias charging and bias transfer rolls.Type: GrantFiled: April 13, 1998Date of Patent: March 14, 2000Assignee: Xerox CorporationInventors: Santokh S. Badesha, Clifford O. Eddy, Arnold W. Henry, Gregory A. Campbell
-
Patent number: 6030328Abstract: In a resin roll 5 for calendering a magnetic recording medium, a surface portion 3a of a thermosetting resin outer layer 3 has high storage elastic modulus (E') of 5.times.10.sup.10 to 5.times.10.sup.11 dyn/cm.sup.2 at a temperature of 50 to 150.degree. C. at a frequency of 10 hertz (Hz). At the surface portion of the thermosetting resin outer layer, the expression representing the relation between storage elastic modulus (E') and the Poisson's ratio (.nu.) is within the following range, under the same conditions:2.times.10.sup.-12 cm.sup.2 /dyn<(1-.nu..sup.2)/E'<2.times.10.sup.-11 cm.sup.Type: GrantFiled: February 17, 1998Date of Patent: February 29, 2000Assignee: Yamauchi CorporationInventors: Atsuo Watanabe, Kenjiro Nakayama, Tatsuyuki Abe
-
Patent number: 6028148Abstract: A silicone rubber composition comprises a silicone rubber and porous inorganic fine powders holding dimethyl-silicone oil.Type: GrantFiled: August 27, 1993Date of Patent: February 22, 2000Assignee: Canon Kabushiki KaishaInventor: Toshiyuki Miyabayashi
-
Patent number: 6020054Abstract: The invention provides a charging roller for electrically charging a photoconductor by placing the roller in contact with the photoconductor and applying voltage between them. The roller has an elastic shaft and an outermost layer of less than 30 .mu.m thick containing an aqueous fluorocarbon resin. The charging roller is effective for providing a constant supply of electric charge to the photoconductor and preventing residual toner from depositing onto the roller.Type: GrantFiled: June 9, 1997Date of Patent: February 1, 2000Assignee: Bridgestone CorporationInventors: Yoshitomo Masuda, Yasushi Inoue, Shigeru Kijima
-
Patent number: 6013201Abstract: In a silicone rubber composition comprising an organopolysiloxane having at least two aliphatic unsaturated groups and a curing agent, thermal black and/or furnace black having a primary particle diameter of 50-500 nm and a DBP oil absorption of 20-50 cc/100 g is blended. There may be further blended an organopolysiloxane having an ionic group-bearing portion as an antistatic agent and/or a hydrocarbon insulating oil. The composition has a stable resistivity in the semiconductive region and thus is useful as semiconductive rolls.Type: GrantFiled: May 26, 1998Date of Patent: January 11, 2000Assignee: Shin-Estu Chemical Co., Ltd.Inventors: Osamu Hayashida, Tsutomu Nakamura
-
Patent number: 6006663Abstract: A method for applying an anti-corrosion protective layer to the surface of a cylinder for the printing unit of a printing press, the surface having been cleaned and microroughened, includes uniformly applying to the cylinder surface a thermally cross-linkable plastic material dissolved in a solvent, drying and, respectively curing and cross-linking the plastic material layer at an elevated temperature, and then mounting the cylinder in the printing unit without further processing the surface form; and a printing unit cylinder having a surface to which the anti-corrosion layer has been applied.Type: GrantFiled: February 17, 1998Date of Patent: December 28, 1999Assignee: Heidelberger Druckmaschinen AktiengesellschaftInventors: Frank Kropp, Joachim Sonnenschein
-
Patent number: 5997456Abstract: Coated rollers (10) with a hard, high release, non-marking, coating with excellent non-stick properties are disclosed for use as idler rollers, or as laminating, coating or printing rollers. The release coating comprises an outermost coat (15) which includes a silicone-epoxy emulsion in a water-based curing system that is sprayed or brushed on a roller core and then allowed to cure at room temperature. The release coating further comprises a primer coat (16) of silicone-epoxy in a water base that is also sprayed or brushed on the roller to form a coat and then allowed to cure at room temperature. Methods for making such rollers are also disclosed.Type: GrantFiled: February 12, 1998Date of Patent: December 7, 1999Assignee: American Roller CompanyInventors: Gary S. Butters, Peter A. Patterson, Gary A. Koerber
-
Patent number: 5996775Abstract: A transport element (1) for transporting or conveying flat goods, such as sheet goods like paper in photocopy machines and printers, includes an inner support member (2) that can be connected to an axle or shaft, and an outer ring member (14) of a rubber-elastic material that at least partially surrounds and is connected in a form-locking manner to the support member (2). The rubber-elastic material has a greater elasticity than the material of the support member (2). The ring member (4) has an outer contact surface (5) for frictionally gripping and transporting the flat goods. The support member (2) has a plurality of grooves (7) distributed around an outer circumferential surface (6) thereof. The rubber-elastic material of the ring member (4) form-lockingly engages the grooves (7). The grooves (7) are open at least toward the outer circumferential surface (6) with a respective opening width (16) that spans an angle .alpha. of at most 5.degree., and are undercut radially inwardly below the openings.Type: GrantFiled: November 21, 1996Date of Patent: December 7, 1999Assignee: Ten Cate Enbi B.V.Inventor: Arthur F. L. Hendrickx
-
Patent number: 5993366Abstract: A low hardness conductive roll, wherein an innermost layer is formed on the peripheral surface of a shaft body, an intermediate layer is formed on the peripheral surface thereof, and further an outermost layer is formed on the peripheral surface thereof, and wherein the outermost layer is formed of a resin composition comprising the following Component (A) so that good toner electrification property and toner releasability are achieved: ##STR1## wherein Y denotes a linear structural portion derived from an acrylic monomer, Z denotes a structural portion derived from an acrylic monomer and also has a structural portion derived from siloxane, and k and n denote positive numbers of 1 to 3,000, respectively.Type: GrantFiled: February 27, 1998Date of Patent: November 30, 1999Assignee: Tokai Rubber Industries, Ltd.Inventors: Akihiko Kaji, Kenichi Ohkuwa, Hitoshi Yoshikawa, Shoji Arimura
-
Patent number: 5993082Abstract: The apparatus comprises a treatment vessel (112) having a path-defining roller (12) biased towards a reaction member (14) to define a nip (136) there-between through which a sheet material path (120) extends. The path-defining roller (12) comprises a core (56) having a covering of elastomeric material, an outer layer (60) of which is doped with a surface modifying material. The roller which is able to resist wear without significant loss to operating characteristics.Type: GrantFiled: June 5, 1998Date of Patent: November 30, 1999Assignee: Agfa-Gevaert N.V.Inventors: Bart Verhoest, Rik Plessers
-
Patent number: 5987289Abstract: A developing device including a developing roller and applicable to an electrophotographic image forming apparatus is disclosed. The developing roller is made up of a flexible member and a shaft and feeds toner to a latent image formed on a photoconductive element. A supply roller supplies the toner to the developing roller. A gap is formed between the flexible member and the shaft at at least one end portion of a printing region assigned to the developing roller. The gap sets up a uniform pressure between the supply roller and the developing roller and between the developing roller and the photoconductive element.Type: GrantFiled: November 30, 1998Date of Patent: November 16, 1999Assignee: NEC CorporationInventor: Ichiro Kawahara
-
Patent number: 5983799Abstract: A replaceable sleeve having a working surface is provided which is adapted to be mounted on a carrier. The sleeve includes an inner polymeric layer, a reinforcing layer overlying the inner layer, an intermediate polymeric layer overlying the reinforcing layer, and an outer polymeric layer. The sleeve may include a cushion layer between the intermediate layer and the outer layer. The layers comprising the sleeve are formed around a support and then cured simultaneously in a single step. The resulting sleeve may be used in printing operations or in other applications such as coating, embossing, laminating, calendering and the like.Type: GrantFiled: September 11, 1998Date of Patent: November 16, 1999Assignee: Day International, Inc.Inventors: William James Lane, III, Michael Edward McLean, Thomas Gerald Ferguson
-
Patent number: 5984849Abstract: The invention provides a novel semiconductive silicone rubber roller suitable for use as a development roller in a photocopying machine exhibiting high performance with stability and long durability. The rubber roller is prepared by (A) forming a cylindrical layer of a semi-conductive silicone rubber on and around a metallic core mandrel, (B) irradiating the surface of the rubber layer with ultraviolet light and (C) coating the ultraviolet-irradiated surface of the rubber layer with a silane coupling agent.Type: GrantFiled: April 28, 1998Date of Patent: November 16, 1999Assignee: Shin-Etsu Polymer Co., Ltd.Inventors: Tsuneo Ohki, Shuji Oguchi
-
Patent number: 5965220Abstract: An installation for coating the surface of a web of material with a paste. A printing screen has a doctor blade lying within for applying the print paste through holes in the printing screen onto the web. A counter roll cooperates with an electromagnet to producing a controllable level of contact pressure of the doctor blade against the printing screen. The roll body of the counter roll is provided with a coating that has piezoelectric elements and is divided into sections specific to the width, each section being individually controllable. This permits dynamic control of the application of paste over the width of the web.Type: GrantFiled: August 12, 1998Date of Patent: October 12, 1999Assignee: Firma Carl FreudenbergInventor: Gerhard Schopping
-
Patent number: 5960226Abstract: The roller comprises a core (56) having an elastomeric covering which comprises an outer exposed region (60) and an intermediate region (58) positioned between the outer region (60) and the core (56). The outer region (60) has a thickness which decreases towards each end of the roller and the intermediate region (58) has a thickness which increases towards each end of the roller. When associated with another such roller to form a nip in an apparatus for wet processing sheet materials, carry-over is reduced, leakage when no sheet material is passing through the nip is reduced, and the risk of physical damage to the sheet material is reduced.Type: GrantFiled: March 23, 1998Date of Patent: September 28, 1999Assignee: Agfa-GevaertInventors: Ludo Van Schepdael, Bart Verhoest
-
Patent number: 5960245Abstract: A fuser member having a support metallic core and an outer layer of material formed over the metallic core, the outer layer including composite material, having a crosslinkable poly(dialkylsiloxane) incorporating an oxide, wherein the poly(dialkylsiloxane) has a weight average molecular weight before crosslinking of about 1,000 to 90,000; one or more crosslinkable poly(siloxane) selected from the group consisting of poly(diarylsiloxane), poly(arylalkylsiloxanes) or mixtures thereof wherein the (diaryllsiloxane) or poly(arylalkylsiloxane) has a weight average molecular weight before crosslinking of about 1,000 to 90,000, a silicone T-resin; at least one silane crosslinking agents; and wherein the weight average molecular weight of the mixture of poly(dialkylsiloxane) and poly(siloxane) is about 5,000 to 80,000.Type: GrantFiled: December 3, 1998Date of Patent: September 28, 1999Assignee: Eastman Kodak CompanyInventors: Jiann H. Chen, Stephen V. Davis, Robert A. Lancaster
-
Patent number: 5957261Abstract: The present invention enables a roller in which a radially outwardly protruding flange-like portion is formed on the outer peripheral portion of a roller body portion made of hard synthetic resin and presenting a substantially disc-like shape.Type: GrantFiled: October 24, 1996Date of Patent: September 28, 1999Assignees: Canon Kabushiki Kaisha, Nifco Inc.Inventors: Isao Inoue, Kenji Yoshida, Haruyuki Yanagi, Masaya Shinmachi
-
Patent number: 5950061Abstract: A fixing member includes a plurality of elastic layers on a core member, at least one elastic layer L1 among these elastic layers being overlaid on an elastic layer L2 having a surface roughness Rz of 10 .mu.m or more. The fixing member has a high heat conductivity, and the temperature depression of a fixing roller is moderated in a continuous paper feeding process.Type: GrantFiled: November 25, 1997Date of Patent: September 7, 1999Assignee: Canon Kabushiki KaishaInventors: Mitsuhiro Ota, Takeshi Menjo, Kazuo Kishino, Hideo Kawamoto
-
Patent number: 5945223Abstract: A flow coating solution consisting essentially of a fluoroelastomer, a nucleophilic crosslinking agent, and an effective solvent selected from the group consisting of N-methyl 2-pyrrolidone, dimethyl formamide, and dimethyl sulfoxide, along with a fuser member containing a layer prepared from flow coating said flow coating solution.Type: GrantFiled: March 24, 1997Date of Patent: August 31, 1999Assignee: Xerox CorporationInventors: Alan R. Kuntz, Frank P. Sgabellone, David E. Maxfield, Jr., Anthony J. Formicola, Jr., Robert N. Finsterwalder, David M. Friel
-
Patent number: 5935712Abstract: A fuser member having improved toner offset release and wear characteristics. The outermost layer comprises a fluoroelastomer with thermally conductive fillers which are surface treated with a coupling agent that is interactive with the fluoroelastomer and with a release agent which may, optionally, be used on the surface of the fluoroelastomer layer.Type: GrantFiled: October 31, 1997Date of Patent: August 10, 1999Assignee: Eastman Kodak CompanyInventors: Biao Tan, Jiann H. Chen, Tonya D. Binga, William J. Staudenmayer
-
Patent number: 5924967Abstract: A transport roller having a core and a first bonding layer at least partially surrounding and bonded to the core. Further, roller has a first layer of corrosion material at least partially surrounding and bonded to the first bonding layer, wherein said corrosion resistant material is electroplated nickel or electroless nickel. In addition, the roller has a second bonding layer for bonding a second layer to the core. The second layer includes a wear and abrasion resistant material, wherein the wear and abrasion resistant material is selected from the group including polyurethane; acrylic; silicon dioxide; alumina; chromium oxide; zirconium oxide; composites of zirconia-alumina; or a mixture thereof.Type: GrantFiled: July 28, 1997Date of Patent: July 20, 1999Assignee: Eastman Kodak CompanyInventors: Edward P. Furlani, Syamal K. Ghosh, Dilip K. Chatterjee
-
Patent number: 5922426Abstract: The present invention provides a paper feed roll adapted for office machines which exhibits a high friction coefficient suitable for the conveyance of copying paper, printing paper, original, etc. and less abrasion. A process for the preparation of such a paper feed roll is also provided. Further, a silicone rubber composition suitable for the foregoing paper feed roll having an excellent formability to roll is provided. In particular, a novel silicone rubber-coated paper feed roll is provided, which is prepared from a silica-containing silicone rubber composition. The silicone rubber obtained by curing the silica-containing silicone rubber composition and composes the paper feed roll has an impact resilience of not less than 80% after curing as determined by JIS K6301, a permanent compression set of not more than 4% under a condition of 25% compression at 70.degree. C. for 22 hours and a 100% modulus of from 0.3 to 1.0 MPa.Type: GrantFiled: May 16, 1997Date of Patent: July 13, 1999Assignees: Fuji Xerox Co., Ltd., Kinjo Rubber Co., Ltd., Dow Corning Toray Silicone Co., Ltd.Inventors: Eiichi Nagatsuka, Shinichi Ogawa, Shigeo Kawachi, Tooru Kataoka, Masaru Kamei, Shinichi Sumimura, Kazuo Higuchi
-
Patent number: 5918098Abstract: A fuser member having a) a substrate; and thereover b) an intermediate filled elastomeric layer with silicone rubber and an aluminum oxide in an amount of from about 0.05 to about 5 percent based on the total volume of the intermediate layer; having thereover c) a outer polymeric layer; having thereover d) an optional outer surfactant layer; and thereover e) an optional fluid release layer.Type: GrantFiled: April 29, 1998Date of Patent: June 29, 1999Assignee: Xerox CorporationInventor: Hans Lochmann Van Bennekom
-
Patent number: 5911099Abstract: There are disclosed an electroconductive member comprising a high-molecular material, e.g. polyurethane as a matrix and a quaternary ammonium salt of an organic acid, e.g. bis-or-mono(quaternary ammonium) oxalate; and an electrophotographic apparatus which makes use of the electroconductive member, especially in the form of an electroconductive roller as a developing member, image transfer member, etc. The electroconductive member, when used in electrophotographic mechanism, minimizes an increase in electric resistance at the time of normal continuous passage of an electric current and also variation range in the electric resistance between the circumstances of low temperature/humidity and those of high temperature/humidity.Type: GrantFiled: October 29, 1997Date of Patent: June 8, 1999Assignee: Bridgestone CorporationInventors: Tadashi Nakajima, Junji Sakata, Takahiro Kawagoe
-
Patent number: 5908680Abstract: A textile pull roll cover is disclosed which has an exterior side with desired frictional characteristics for engagement with an advancing textile web. On its opposite side, the pull roll cover is affixed to a cylindrical outer surface of a textile pull roll by a repositionable pressure sensitive adhesive disposed therebetween. A method for making a textile pull roll is disclosed, as well as a method for changing a pull roll cover using repositionable pressure sensitive adhesive.Type: GrantFiled: March 5, 1996Date of Patent: June 1, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Louis S. Moren, David E. Johnson, Dennis G. Welygan
-
Patent number: 5903808Abstract: A developing roller is adapted to carry a developer on its surface and come in contact with or close to a photoconductor drum having an electrostatic latent image borne on its surface whereby the developer is supplied to the drum to visualize the latent image. The developing roller includes a highly conductive shaft and an elastic layer with conductivity formed around the shaft. The elastic layer is surface treated so as to have a resin component which contains a urea resin and/or melamine resin. The roller satisfies log(R.sub.2 /R.sub.1).ltoreq.4.5 wherein the untreated roller has a resistance R.sub.1 and the roller with the resin component has a resistance R.sub.2. The developing roller does not contaminate the photoconductor drum and ensures that images of quality are reproduced without a density variation and background fog over a long time.Type: GrantFiled: September 18, 1996Date of Patent: May 11, 1999Assignee: Bridgestone CorporationInventors: Yoshio Takizawa, Koji Takagi, Takahiro Kawagoe
-
Patent number: 5900295Abstract: A fixing roller for an electrophotographic device has a cylindrical-shaped metallic base body, an insulation layer formed on an outer peripheral surface of the cylindrical-shaped metallic base body, and a resistance resin layer laminated on the insulation layer. The resistance resin layer is prepared using an injection-molding technique in which a die having a side gate structure is used as a resin-molding die. A major constituent of the resistance resin layer is selected from a polyphenylene sulfide resin, a polyphthalamide resin, and a liquid crystal polymer resin. In addition, the resistance resin layer also contains a mixture of carbon black and carbon fiber. Thus, the resistance resin layer has a specific volume resistance of 2 .OMEGA.cm or less in a direction along a central line of the cylindrical-shaped metallic base body. Both ends of the resistance resin layer are concentrically connected to ring-shaped metallic electrodes.Type: GrantFiled: March 20, 1997Date of Patent: May 4, 1999Assignee: Fuji Electric Co., Ltd.Inventor: Noriaki Kawada
-
Patent number: 5897477Abstract: A developer carrier comprising a cylindrical support having provided on the outer surface thereof a coating layer for retaining a developer, wherein the coating layer comprises electrically conductive fine particles and a binder resin comprising a phenolic resin having a weight-average molecular weight of from 3,000 to 5,000 as determined before being crosslinked. Also disclosed is a developing apparatus which comprises a developer carrier for retaining a developer on the surface thereof and for conveying the developer onto the position at which an electrostatic latent image formed on a latent image carrier is developed, wherein the developer carrier comprises a cylindrical support having provided on the outer surface thereof a coating layer for retaining a developer, wherein the coating layer comprises electrically conductive fine particles and a binder resin comprising a phenolic resin having a weight-average molecular weight of from 3,000 to 5,000 as determined before being crosslinked.Type: GrantFiled: February 26, 1997Date of Patent: April 27, 1999Assignee: Fuji Xerox Co., Ltd.Inventors: Kenji Nakatogawa, Shigeo Ohta, Hiroshi Takayama
-
Patent number: 5895689Abstract: A method for coating a cylindrical object which comprises applying to the cylindrical object an effective amount of a polyurethane composition comprising:a) an isocyanate-terminated polyurethane prepolymer; andb) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive.Type: GrantFiled: May 6, 1998Date of Patent: April 20, 1999Assignee: Uniroyal Chemical Company, Inc.Inventor: Vincent John Gajewski
-
Patent number: 5895711Abstract: A heat-fixing roll is coated with a hardened silicone coating composition containing such materials (1A) and (1B) or (2A) through (2D) as follows:(1A) organosiloxane consisting of a hydrolyzed condensation polymer of 20-200 parts by weight of silicon compound Si(OR.sup.1).sub.4 and colloidal silica, 100 parts by weight of silicon compound R.sub.2 Si(OR.sup.1).sub.3, and 0-60 parts by weight of silicon compound R.sub.2 Si(OR.sup.1).sub.2 (R.sup.1 and R.sup.2 being monovalent hydrocarbon radicals), with the weight average molecular weight controlled to be more than 800 in polystyrene conversion, and(1B) a straight-chain polysiloxanediol HO(R.sup.3.sub.2 SiO).sub.n H (R.sup.3 being a monovalent hydrocarbon radical, and n.gtoreq.3); or(2A) a silica dispersed oligomer solution of organosilane prepared by partially hydrolyzing a hydrolyzable organosilane R.sup.4.sub.m SiX.sub.4-m (R.sup.Type: GrantFiled: November 10, 1997Date of Patent: April 20, 1999Assignee: Matsushita Electric Works, Ltd.Inventors: Takeyuki Yamaki, Minoru Inoue
-
Patent number: 5887517Abstract: A soft nip calender employing a compliant roll constructed of circumferentially superpositioned layers of compliant material which are progressively less compliant as the layers approach an underlying steel roll.Type: GrantFiled: October 24, 1997Date of Patent: March 30, 1999Assignee: Beloit Technologies, Inc.Inventors: Shihua Liang, Rex A. Becker