Details Patents (Class 399/286)
  • Patent number: 10913251
    Abstract: A buffer material including a skinned polyurethane foam including a foam layer and a skin layer formed on the surface of the foam layer, wherein the skinned polyurethane foam essentially contains no silicone compound, the foam layer is polyurethane foam, the skin layer is a polyurethane resin layer produced by reaction of a skin-isocyanate component containing an aliphatic and/or an alicyclic polyisocyanate with a skin-active hydrogen group-containing component, the skin layer has a storage modulus at 23° C. (E?coat) of 1×107 Pa or more and 3×108 Pa or less, the foam layer has a storage modulus at 23° C. (E?foam) of 1×105 Pa or more and 5×106 Pa or less, and the ratio (E?coat/E?foam) of the storage modulus at 23° C. (E?coat) of the skin layer relative to the storage modulus at 23° C. (E?foam) of the foam layer is 10 or more and 500 or less.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: February 9, 2021
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Hiroshi Kanayama, Minoru Watanabe, Makoto Kajiura, Satoshi Yamasaki
  • Patent number: 10895824
    Abstract: A developing roller that suppresses contamination of the surface of a photosensitive member and also obtains a high-quality image. The developing roller includes an electro-conductive substrate, an electro-conductive elastic layer and a surface layer which are stacked in this order, wherein the surface layer has resin particles that are dispersed in a polyurethane matrix, an outer surface of the surface layer has a first protrusion originating in first resin particle and a second protrusion originating in second resin particle, wherein the first resin particle contains polyurethane, an elastic modulus E1 of the first resin particle is 100 to 2000 MPa, an elastic modulus E2 of the second resin particle is 2 to 50 MPa, a maximum height roughness Rz of the outer surface is 6 to 18 ?m, and a peak vertex density Spd is 5.0×103 to 5.0×104(1/mm2).
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: January 19, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryo Sugiyama, Yoshinobu Ogawa, Masashi Uno, Tomoya Uesugi, Kenta Matsunaga, Wataru Moriai
  • Patent number: 10871726
    Abstract: An image forming apparatus includes an image bearing member configured to bear an image and a charging roller to which a direct current voltage is applied and which is configured to charge a surface of the image bearing member. The charging roller includes a shaft member, an elastic layer formed around the shaft member, and a surface layer formed around the elastic layer. Particles having particle diameters within a range of 2 ?m or larger and 15 ?m or smaller are dispersed in the surface layer. A maximum height Sz (?m) and an autocorrelation length Sal (?m) with respected to the surface layer of the charging roller satisfy 8?Sz?16 and 13?Sal?30.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: December 22, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kota Mori
  • Patent number: 10782647
    Abstract: A cartridge includes a rotatable developer carrying member rotatably supported by the frame and rotatable about an axis L1 and a coupling member rotatable about an axis L2, with the coupling member being configured to transmit a rotational force to the developer carrying member. The coupling member is movable between (a) a reference attitude in which the axis L2 of the coupling member is parallel to and offset from the axis L1 of the developer carrying member, (b) a first inclination attitude in which the coupling member is inclined in a direction toward the developer carrying member, and (c) a second inclination attitude in which the coupling member is inclined in a direction different from the direction that the coupling member is inclined in the first inclination attitude.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: September 22, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yosuke Kashiide, Masaaki Sato, Hiroyuki Munetsugu
  • Patent number: 10768545
    Abstract: An inventive charging roller (1) includes a roller body (2) which is formed of a crosslinked product of a rubber composition containing a rubber component including 30 to 70 parts by mass of GECO, 15 to 60 parts by mass of IR and not less than 1 part by mass of SBR and/or NBR based on 100 parts by mass of the overall rubber component and has an outer peripheral surface (5) finished in a finish-polished surface. An inventive production method includes the steps of: forming a roller body (2) from the crosslinked product of the rubber composition described above; and wet-polishing or mirror-polishing an outer peripheral surface (5) of the roller body (2) into a finish-polished surface.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: September 8, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daijiro Suzuki
  • Patent number: 10712684
    Abstract: To provide a developing roller having improved toner conveying force in a high-temperature and high-humidity environment. The developing roller has a substrate and an electro-conductive layer on the substrate. The outer surface of the developing roller has an electrical insulating first region and an electro-conductive second region adjacent to the first region and at the same time has at least one groove in the first region.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: July 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuhito Wakabayashi, Kazuaki Nagaoka, Ryo Sugiyama, Kunimasa Kawamura, Minoru Nakamura
  • Patent number: 10705449
    Abstract: Provided is a developing member capable of sufficiently securing a toner conveyance amount, thereby being capable of suppressing a reduction in image density, even when a solid black image or an image having a high print percentage is continuously output. The developing member includes an electro-conductive substrate and an electro-conductive layer thereon, an outer surface of the developing member includes a first, second and third regions, when surface potentials of the respective regions with scanning probe microscope, and measured surface potential of the respective regions are defined as V1, V2, and V3, respectively, V1 is ?0.70 V to ?0.50 V, 1.30?V1/V2?25.00, and V3 is 0.00 V to 0.50 V.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: July 7, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazutoshi Ishida, Kazuaki Nagaoka, Minoru Nakamura, Ryo Sugiyama
  • Patent number: 10678154
    Abstract: An electrophotographic electroconductive member which keeps high discharge performance even in use under a high temperature and high humidity environment is provided. The electroconductive member includes an electroconductive substrate, and a surface layer including a net-like structural body disposed on the electroconductive substrate, wherein the net-like structural body includes non-electroconductive fibers containing a radiation degradable resin.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: June 9, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenji Takashima, Kazuhiro Yamauchi, Masahiro Kurachi, Yuichi Kikuchi
  • Patent number: 10635019
    Abstract: Provided is a developing roller comprising an electroconductive substrate and an electroconductive layer thereon, the electroconductive layer retaining resin particles so that at least a part of each of the resin particles is exposed on an outer surface of the developing roller; the outer surface of the developing roller constituted by electrically insulating domains and an electroconductive matrix, assuming that a square region 200-?m in a side is put on the outer surface of the developing roller, the square region including the domains, among the domains in the square region at least two of them satisfying specific condition, and assuming that the outer surface of the developing roller is charged, and creating a potential map of the charged outer surface of the developing member, the two domains satisfying the specific condition being ascertained in the potential map.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: April 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Noriyuki Doi, Ryo Sugiyama, Minoru Nakamura, Seiji Tsuru
  • Patent number: 10599062
    Abstract: An example charging member includes a conductive support, a conductive elastic body layer laminated on the conductive support, and a conductive resin layer laminated as an outermost layer on the conductive elastic body layer. The conductive resin layer may contain a matrix material and resin particles. The conductive resin layer may have an arithmetic average roughness Ra of 2.0 to 7.0 ?m, a 10-point average roughness Rzjis of 15 to 40 ?m, and a skewness Rsk of 0.5 to 2.5.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: March 24, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.
    Inventor: Noriaki Kuroda
  • Patent number: 10503094
    Abstract: Provided is a development roller which is capable of improving a black solid density and a 2-dot density simultaneously to form a satisfactory image with excellent contrast and thin line reproducibility. A development roller includes a roller body that contains a tubular inner layer consisting of an elastic material and an outer layer consisting of an elastic material, a roller resistance value R1 (?, an applied voltage of 400 V) in a state when there is only the inner layer satisfies formula (1): 6.5?log R1?9.5??(1), and a volume resistivity R2 (?·cm, an applied voltage of 400 V) in a state when there is only the outer layer satisfies formula (2): log R2?9.0??(2).
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: December 10, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daijiro Suzuki
  • Patent number: 10429758
    Abstract: A height of convexities in a 0.7-mm-square area of a surface of the charging member is measured at five or more different positions in an axial direction and calculated. A height of a position where the charging member occupies 0.01 area % from a highest portion is defined as a reference height. An average proportion of areas occupied by the charging member at a position 1.7 ?m lower than the reference height is 2 area % or less relative to 100 area % of the 0.7-mm-square area.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: October 1, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kosuke Narita, Shogo Tomari, Keiko Matsuki
  • Patent number: 10394182
    Abstract: A cartridge includes a rotatable member, a rotatable rotational force receiving member, a preventing member including an accommodating portion, a rotatable coupling member including a free end portion which includes a rotational force receiving portion and including a connecting portion connected with the preventing portion to be partly accommodated in the accommodating portion so that a rotational axis of the coupling member permits tilting thereof relative to a rotational axis of the rotational force receiving member, a shaft portion. The preventing member includes a supporting portion for supporting ends of the shaft portion so as to prevent the shaft portion from moving in a rotational direction of the rotatable member to transmit the rotational force received from the shaft portion via the supporting portion to the rotational force receiving member.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 27, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunsuke Uratani, Yu Fukasawa
  • Patent number: 10168635
    Abstract: A conductive member includes a conductive substrate; and a conductive elastic layer disposed on the conductive substrate and exhibiting ionic conduction. The conductive elastic layer contains an elastic material, which contains epichlorohydrin rubber, and a layered inorganic compound, and the amount of free chlorine ions in the conductive elastic layer is 1 ?g/g or more and 80 ?g/g or less.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: January 1, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shogo Tomari, Yuki Tagawa, Masato Ono, Minoru Rokutan, Yuma Tanaka, Masayuki Seko
  • Patent number: 10095149
    Abstract: A conductive member includes a conductive substrate; and a conductive elastic layer disposed on the conductive substrate and exhibiting ionic conduction. The conductive elastic layer contains an elastic material containing epichlorohydrin rubber, and the amount of free chlorine ions in the conductive elastic layer is 1 ?g/g or more and 80 ?g/g or less.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: October 9, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shogo Tomari, Yuki Tagawa, Masato Ono, Minoru Rokutan, Yuma Tanaka, Masayuki Seko
  • Patent number: 10067430
    Abstract: A member for electrophotography has an electro-conductive base and at least one electro-conductive resin layer, in which the electro-conductive resin layer of the outermost layer contains urethane resin and the urethane resin has a structure of a silicone graft fluororesin and a structure represented by Formula (1)
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 4, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideya Arimura, Shohei Urushihara, Masaki Yamada
  • Patent number: 10036991
    Abstract: A cleaning blade includes a resin substrate having a substantially planar shape and a coating layer that covers at least one edge of the resin substrate and that has a connection layer and a surface layer, the connection layer being formed so as to face an interface with the resin substrate and containing diamond-like carbon and at least one selected from the group consisting of titanium nitride, titanium silicon, titanium tungsten, titanium carbide, and titanium carbonitride, the surface layer covering the connection layer and containing diamond-like carbon.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: July 31, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Daisuke Tanaka
  • Patent number: 10025222
    Abstract: Provided is a roller, in particular a conductive roller, capable of suppressing generation of cut debris from a cut surface of an end part of a foam layer in the roller axial direction over a long period of time, and an image forming device using the roller. A roller includes a shaft 1, a foam layer 2 and at least one film layer 3 sequentially provided on the outer periphery of the shaft. Both end parts in the roller axial direction of the foam layer and the film layer are cut, a filler layer 4 is provided on the cut surface of the cut foam layer and the cut film layer, at least the cut surface of the foam layer is covered with the filler layer, and the filler layer contains a water-based urethane resin.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: July 17, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yusuke Fujisawa
  • Patent number: 10012927
    Abstract: A developing roller is provided, which includes a roller body having a simplified structure without a coating film and yet having a higher wear resistance. The developing roller (1) includes a roller body (2) made of a crosslinked product of a rubber composition containing a rubber component including 20 to 50 parts by mass of ECO and/or GECO as an ion conductive rubber and 50 to 80 parts by mass of NBIR based on 100 parts by mass of the overall rubber component, and an oxide film (6) formed in an outer peripheral surface (5) of the roller body (2) by irradiation with ultraviolet radiation or the like.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: July 3, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Kei Tajima, Yuta Imase
  • Patent number: 9983505
    Abstract: Provided is a developing roller including a shaft body, an elastic layer formed on an external circumference of the shaft body, and a surface layer formed on an external circumference of the elastic layer. The surface layer is formed of polyurethane containing a reaction product of a fluoroethylene vinyl ether copolymer and an isocyanurate form of isocyanate and having a film thickness of from 0.5 ?m through 2.0 ?m. The developing roller has grooves in a surface of the developing roller. The angle of the grooves from a circumferential direction is from 0 degrees through 30 degrees.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: May 29, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hideaki Yasunaga, Keiichiro Juri
  • Patent number: 9964890
    Abstract: It is an object of the present invention to provide a development roll rubber member that has a uniformly roughened surface on a rubber member surface, that is capable of ensuring a sufficient thickness without contaminating a peripheral portion while maintaining a flexibility in a coating layer and a convex portion without impairing softness of a rubber substrate layer, and that has the coating layer achieving non-tackiness and low friction, and a method of manufacturing the same, and the object is achieved by putting a reactive silicone oil, an isocyanate compound, and a diluent solvent capable of dissolving both the reactive silicone oil and the isocyanate compound into a reaction container, by causing a prepolymerization reaction in which the reactive silicone oil and the isocyanate compound are reacted into a polymerized state in the diluent solvent in the reaction container while dissolution in the solvent is maintained, by subsequently mixing a polyol and an isocyanate compound solution and using silic
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: May 8, 2018
    Assignees: NOK Corporation, Synztec Co., Ltd.
    Inventors: Toshihiro Higashira, Atsushi Ikeda, Tomohiro Kondo
  • Patent number: 9952531
    Abstract: The present disclosure provides developing member superior in triboelectric charge imparting ability to a toner. The developing member includes a substrate and a surface layer, the surface layer containing alumina particles and a resin, the surface layer having protrusions on the surface thereof. Each of the protrusions containing the alumina particles, part or all of the alumina particles being exposed at the surfaces of the protrusions, and the resin being interposed among the alumina particles.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: April 24, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Ishii, Minoru Nakamura, Hiroshi Morishita, Kenta Matsunaga
  • Patent number: 9946219
    Abstract: An image forming apparatus includes: a heating unit; a pressure roller; a first frame supporting the heating unit; a second frame engaging the first frame; a first gear; a second gear; and a fixing member. The second frame supports a shaft portion of the pressure roller. The first gear is provided at one end of the shaft portion and rotatable with the pressure roller. The second gear engages the first gear and transmits a drive force to the first gear. The fixing member has a first portion engaging the shaft portion and a second portion engaging the second frame. At least a part of the first portion engages the shaft portion at a position on a downstream side of the shaft portion in a second direction in which the shaft portion receives a force upon transmission of the drive force.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: April 17, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Hiroki Mori, Hiroshi Handa, Tatsuo Ogasawara, Takuji Matsuno
  • Patent number: 9921518
    Abstract: It is directed to providing a developing roller capable of forming a high-quality electrophotographic image. The developing roller includes a substrate, an electro-conductive elastic layer on the substrate, and a plurality of electrical insulating domains on the electro-conductive elastic layer. The developing roller has a length L of 200 mm or more in a longitudinal direction orthogonal to the circumferential direction thereof. The surface of the developing roller includes the surfaces of the domains and an exposed portion of the electro-conductive elastic layer, the exposed portion being uncovered with the domains. The developing roller has protrusions on the surface thereof, the protrusion being formed by the domains. The electro-conductive elastic layer has a plurality of protrusions at the exposed portion. The developing roller has an Asker C hardness of 50 degrees or more and 90 degrees or less.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: March 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuji Sakurai, Kazutoshi Ishida, Ryo Sugiyama, Rieko Takabe
  • Patent number: 9874832
    Abstract: Provided is a roller capable of suppressing generation of cut waste from an end of a roller due to contact with another member inside a device when mounted on an image forming device, particularly a conductive roller, and an image forming device using the same. A roller includes a shaft 1 and a base layer 2 provided on the outer periphery of the shaft. A filler layer 4 covering the base layer is provided on end faces of both ends of the base layer in the roller axial direction, and the filler layer is composed of a material having a breaking strain measured according to a tensile test of JIS K 7127 of not less than 120% and a tensile stress at 100% elongation measured according to a tensile test of JIS K 7127 of from 5 to 30 N/mm2.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: January 23, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Yusuke Fujisawa
  • Patent number: 9684267
    Abstract: A method of preparing the surface of a roller comprising adding a coating comprising isocyanate to a ground surface of the roller. A roller comprising a ground surface, the ground surface having unreacted hydroxyl (—OH) groups on the surface of the roller and a layer of isocyanate layered over the unreacted hydroxyl (—OH) groups on the surface of the roller, the isocyanate forming a urethane bond on the surface of the roller.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: June 20, 2017
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Guang Jin Li, Daniel Tanchangco
  • Patent number: 9547254
    Abstract: A semiconductive roller (1) is provided, which is formed from a rubber composition containing a rubber component including: (1) an epichlorohydrin rubber; (2) at least one solid rubber selected from the group consisting of a solid BR and a solid SBR; and (3) at least one liquid rubber selected from the group consisting of a liquid BR and a liquid SBR.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: January 17, 2017
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Kenichi Kuroda
  • Patent number: 9493694
    Abstract: Provided is a lubricant composition for a refrigerator having the following characteristics: the composition being used for a refrigerator using a refrigerant having a specific structure such as an unsaturated fluorinated hydrocarbon compound serving as a refrigerant having a low global warming potential and usable particularly in current air-conditioning system for cars; the composition having excellent stability as well as excellent compatibility with the refrigerant; the composition including a base oil containing a polyoxyalkylene glycol derivative as a main component and 1 to 20% by mass of a monoepoxy compound based on the total amount of the composition; and the refrigerator using a refrigerant containing at least one kind of fluorine-containing organic compound selected from compounds represented by the molecular formula (A) CpOqFrRs or including a combination of the fluorine-containing organic compound and a saturated fluorinated hydrocarbon compound.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: November 15, 2016
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masato Kaneko, Harutomo Ikeda, Tokue Sato
  • Patent number: 9366987
    Abstract: A developing roller is provided, which is capable of controlling a solid black density and a dot density at higher levels than currently available levels. An image forming apparatus employing the developing roller is also provided. The developing roller (1) includes a tubular base layer (4) of an elastic material, and a surface layer (6) of an elastic material provided on an outer peripheral surface (5) of the base layer (4), wherein the thickness d1 (mm) of the surface layer, the roller resistance R? (log ? as measured with an application voltage of 10 V) of the base layer, and the roller resistance R (log ? as measured with an application voltage of 100 V) of a stack including the base layer and the surface layer satisfy the following expressions (1) to (3): 1.0?R?R???(1) 0.1?d1?2??(2) 7.5?R?8.5??(3) The image forming apparatus incorporates the developing roller.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: June 14, 2016
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Daijiro Suzuki
  • Patent number: 9327295
    Abstract: The present disclosure relates to a method for concentrating a substance, which may be an electrostatic printing ink. An apparatus for concentrating a substance is also described.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: May 3, 2016
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Shai Lior, Avner Schneider, Mark Sandler, Yaron Peri
  • Patent number: 9304445
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes an aluminum oxide thin film and a resin coat layer, the aluminum oxide thin film being formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being formed on a surface of the aluminum oxide thin film that has been subjected to a predetermined heating process, the resin coat layer being made of a resin material and having electric conductivity.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: April 5, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masashi Fujishima, Yuji Kamiyama, Tamotsu Shimizu, Shizuka Okada, Sakae Saito, Yasuhiro Oishi
  • Patent number: 9291953
    Abstract: A transfer member includes a support, an elastic layer, and a resin layer having a sea-island structure on the elastic layer, wherein elongation at break of the resin layer is from 20% to 180%, and an average diameter of an island portion thereof is from 0.5 ?m to 3 ?m.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: March 22, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Nobuyuki Ichizawa, Masato Ono
  • Patent number: 9268261
    Abstract: A developing device includes a frame, a developing roller, a blade unit, and a first seal member. A blade unit extends in an axial direction of the developing roller and in contact with the peripheral surface thereof. The first seal member is configured to seal a boundary between the frame and the axial end portions of the developing roller. The frame has a fixing portion to which end portions of the blade is fixed. The fixing portion has a support surface having an outer edge and an inner edge in the axial direction. The outer edge is positioned outward of an inner edge of the first seal member in the axial direction, and the inner edge of the support surface is positioned inward of the inner edge of the first seal member in the axial direction.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: February 23, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Handa, Hiroki Mori
  • Patent number: 9261811
    Abstract: A developing roller that is capable of carrying toner on a surface thereof, and that supplies the toner carried on the surface to a surface of a photosensitive drum when a voltage is applied thereto, includes: a rubber layer; and a surface layer that covers the rubber layer, contains alumina, and has a higher volume resistivity than the rubber layer.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: February 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazunari Hagiwara, Tatsuaki Orihara, Shuhei Tokiwa, Yasuyuki Matsumoto, Naoki Fuei, Makoto Fukatsu, Yoshikuni Ito
  • Patent number: 9229372
    Abstract: A developing device is provided. The developing device includes a developer carrier, a regulator, a first developer storing chamber, a plurality of conveyers disposed within the first developer storing chamber, a second developer storing chamber in communication with the first developer storing chamber, and a supply member disposed within the second developer storing chamber. The developer carrier carries developer on its surface and supplies developer to a latent image carrier carrying a latent image. The regulator regulates the thickness of developer on the surface of the developer carrier. The first developer storing chamber stores developer separated from the developer carrier by the regulator and is to be supplied with fresh developer. Each of the plurality of conveyers coveys developer in a different conveyance direction. The second developer storing chamber is to be supplied with developer from the first developer storing chamber. The supply member supplies developer to the developer carrier.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: January 5, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomofumi Yoshida, Takafumi Miyazaki, Yasuhide Ohkubo, Yuusuke Furuichi, Rie Mitani
  • Patent number: 9223256
    Abstract: An intermediate transfer belt including a base layer, and an elastic layer on the base layer containing spherical particles on a surface thereof and containing an elastic layer ingredient, wherein the elastic layer contains a fatty acid in an amount of 0.001 parts by mass to 0.040 parts by mass relative to 100 parts by mass of the elastic layer ingredient.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: December 29, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Sayaka Katoh, Jun Aoto, Kenichi Mashiko, Shinichi Nitta, Atsuo Hirai
  • Patent number: 9213259
    Abstract: A developing device includes a developer bearing member which bears a two-component developer including a toner and carrier, a magnet member disposed inside the developer bearing member, and a developer regulating member which regulates a layer thickness of the developer borne on the developer bearing member. The developer regulating member is made of magnetic material and is fixed at both end portions in a longitudinal direction. Grooves are formed on a surface of the developer bearing member, and a developer conveying force of the grooves at a central portion of the developer bearing member in the longitudinal direction is larger than a developer conveying force of the grooves at an end portion of the developer bearing member in the longitudinal direction.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: December 15, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koji Shigehiro
  • Patent number: 9098013
    Abstract: A developing roller, including: a shaft containing a metal; an elastic layer on a circumference of the shaft; and a surface layer on a circumferential surface of the elastic layer, wherein the surface layer contains: a polyurethane which is a reaction product between a fluoroethylene vinyl ether copolymer and an isocyanurate form of an isocyanate; and particles having an average primary particle diameter of 5 nm to 30 nm, and wherein the polyurethane has a peak intensity ratio of a NCO group to a hydroxyl group of 5.6 to 8.8 in an infrared absorption spectrum obtained by an attenuated total reflection method.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: August 4, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hideaki Yasunaga, Keiichiro Juri, Yuta Takeuchi, Tsuyoshi Nozaki, Yoshimichi Ishikawa, Tomoharu Miki
  • Patent number: 9098062
    Abstract: A process cartridge for an image forming apparatus includes a developing roller, including a shaft member and an elastic layer therearound, for developing operation while contacting an image bearing member with a peripheral speed difference; a toner supplying roller contactable to the developing roller; a regulating member, contactable to the developing roller, wherein a length of the regulating member is shorter than that of the developing roller; and a cleaning blade, contactable to the image bearing member. The developing roller has a region capable of carrying the toner regulated by the regulating member and a region, outside thereof, both of which regions are contactable to the image bearing member, wherein the cleaning blade extends over the regions when the cleaning blade is contacted to the image bearing member.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: August 4, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Seiichi Shinohara
  • Patent number: 9056989
    Abstract: An insulating silicone rubber composition superior in reliability is provided that has excellent antistatic property while being free from bleeding, blooming, and discoloration. The insulating silicone rubber contains silicone rubber, ionic liquid having an alkoxysilyl group, and preferably a crosslinking agent. The content of the ionic liquid is preferably within a range from 0.001 to 5 parts by mass with respect to 100 parts by mass of the total amount of the silicone rubber and the crosslinking agent.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: June 16, 2015
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventor: Satoshi Suzuki
  • Publication number: 20150132032
    Abstract: A developing roller that is capable of carrying toner on a surface thereof, and that supplies the toner carried on the surface to a surface of a photosensitive drum when a voltage is applied thereto, includes: an elastic layer; and a surface layer that covers the elastic layer and contains aluminum oxide, wherein the aluminum oxide of the surface layer contains tetracoordinated aluminum atoms and hexacoordinated aluminum atoms existing in a higher proportion than the tetracoordinated aluminum atoms.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 14, 2015
    Inventors: Kazunari Hagiwara, Tatsuaki Orihara, Shuhei Tokiwa, Yasuyuki Matsumoto, Manami Haraguchi, Atsushi Nakamoto, Yasuhiro Horiguchi
  • Publication number: 20150132033
    Abstract: A toner carrier includes a metal core, a barrel formed on an outer circumference of the metal core and including at least an elastic layer, and a coating formed on outer circumferences of both ends of the barrel. The coating has a thickness and a width of an outer circumference of the coating is different from a width of an inner circumference of the coating. The width is from an end surface of the barrel along an axis of the barrel, and the width of the outer circumference is larger than the width of the inner circumference so that the end surface of the coating is reversely inclined.
    Type: Application
    Filed: January 21, 2015
    Publication date: May 14, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroya Abe, Masaki Watanabe, Yasutaka Shimizu
  • Publication number: 20150132031
    Abstract: A developing roller that is capable of carrying toner on a surface thereof, and that supplies the toner carried on the surface to a surface of a photosensitive drum when a voltage is applied thereto, includes: a rubber layer; and a surface layer that covers the rubber layer, contains alumina, and has a higher volume resistivity than the rubber layer.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 14, 2015
    Inventors: Kazunari Hagiwara, Tatsuaki Orihara, Shuhei Tokiwa, Yasuyuki Matsumoto, Naoki Fuei, Makoto Fukatsu, Yoshikuni Ito
  • Patent number: 9031478
    Abstract: A developing roller includes a core metal and an elastic layer formed on an outer circumference of the core metal. An outermost surface of the developing roller is roughened. A difference between a maximum value and a minimum value of an indentation power of the outermost surface is 10% to 21%, wherein the indentation power is measured by a micro-indentation test at 120 locations spaced 3 degrees apart on a circumference of the developing roller, which is at a center of the developing roller with respect to a longitudinal direction. A developing device and an image forming apparatus each include the developing roller.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: May 12, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Juri, Hideaki Yasunaga
  • Patent number: 9026015
    Abstract: A developing roller to bear toner thereon is provided. The developing roller includes a cylindrical electroconductive substrate; an electroconductive elastic layer located on a peripheral surface of the cylindrical electroconductive substrate; and a toner bearing layer located on a peripheral surface of the electroconductive elastic layer. The toner bearing layer includes a polyurethane resin, which is a reaction product of at least an isocyanate compound having an isocyanurate structure and a polyol at a NCO/OH molar ratio of from 90 to 110. The toner bearing layer has a water contact angle of from 135° to 155°, and a static friction coefficient of from 0.10 to 0.15.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Juri, Hideaki Yasunaga, Chiyoshi Nozaki
  • Patent number: 9026014
    Abstract: Provided is a developing roller in which printing quality, in particular, one-dot level fine line printing quality is improved by securing a high resistance value and high surface potential on the surface layer. The elastic roller comprises successively on the outer periphery of a shaft 1 an elastic layer 2, an intermediate layer 3, and a surface layer 4. The surface layer 4 contains a urethane (meth)acrylate oligomer obtained by allowing polybutadiene polyol or hydrogenated polybutadiene polyol, polyisocyanate, and (meth)acrylate having a hydroxyl group to react.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: May 5, 2015
    Assignee: Bridgestone Corporation
    Inventors: Akihide Oosaku, Shogo Imai, Yusuke Fujisawa
  • Patent number: 9020405
    Abstract: A doctor blade assembly for the developer unit of an electrophotographic imaging system. The doctor blade assembly includes a blade member having a first longitudinal edge for contacting a developer roll of an imaging system; a bracket member operatively connected to the blade member; and at least one bias member having a first end portion along a first longitudinal end portion of the bracket member and a second end portion contacting a distal portion of the blade member so as to present a force thereon. The force presented by the bias member serves as a counterforce to at least partly offset a force presented on the doctor blade and developer roll by a seal member of the developer unit.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: April 28, 2015
    Assignee: Lexmark International, Inc.
    Inventors: Nicholas Fenley Gibson, Brad Edward Mattingly, Benjamin Keith Newman
  • Patent number: 9011306
    Abstract: The semiconductive roller according to the present invention includes a nonporous roller body made of a rubber composition containing styrene-butadiene rubber and epichlorohydrin rubber as rubber components.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: April 21, 2015
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Yoshihisa Mizumoto, Takashi Marui
  • Patent number: 9014600
    Abstract: Provided are a developing roller having an elastic layer formed on an outer circumferential face of a shaft and a coating layer formed on an outer circumferential face of the elastic layer, wherein the coating layer is composed of first coating layers that are formed at respective edges across the elastic layer, and a second coating layer formed between the first coating layers, and wherein the first coating layers contain a resin obtained through a reaction of a polyol with a silane-coupling agent, fluororesin particles, and an electric conductivity agent; and the second coating layer contains a urethane resin, an ionic liquid, an electric conductivity agent, and filler particles; and a development apparatus and an image-forming device having the developing roller. The provided are capable of keeping the image quality high and of arresting leakage of the toner satisfactorily.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 21, 2015
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Tomoharu Takeuchi, Taichi Ohkubo
  • Publication number: 20150104225
    Abstract: An image forming apparatus uses a developer containing toner particles. The image forming apparatus includes a toner-particle bearing member for bearing the toner particles. Each toner particle includes a toner core containing a binder resin and a shell layer coating a surface of the toner core. The toner-particle bearing member includes a substrate and a surface layer coating a surface of the substrate. The surface layer and the shell layer are each formed from a resin containing a thermosetting resin.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 16, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yasushi IMANISHI, Kenshi MATSUI