Photoconductive Member Patents (Class 399/159)
  • Patent number: 11194265
    Abstract: An image forming apparatus includes a photoconductor, light emitting elements, a developing device, a fixing device, and a controller. The photoconductor is charged. The light emitting elements form light spots on the photoconductor in order to form an electrostatic latent image on the photoconductor, and are provided to have a first distance with each other in a main scanning direction. The developing device develops an electrostatic latent image on the photoconductor to a toner image. The fixing device fixes the toner image to a sheet. The controller causes the light emitting elements to form first light spots on the photoconductor, causes the photoconductor to move toward the light emitting elements by a second distance shorter than the first distance in a sub-scanning direction orthogonal to the main scanning direction, and causes the light emitting elements to form second light spots on the photoconductor.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: December 7, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takeshi Watanabe, Koji Tanimoto
  • Patent number: 11175599
    Abstract: Provided is an electrophotographic photoreceptor, which is excellent in abrasion resistance and scratch resistance, has excellent electrical characteristics, and is capable of inhibiting an image defect, a manufacturing method of an electrophotographic photoreceptor, a process cartridge, and an electrophotographic apparatus. A surface layer of the electrophotographic photoreceptor contains a copolymer of a composition which contains resin particles containing fluorine atoms, a charge transport compound having 2 or more polymerizable functional groups, a compound represented by General Formula (1), and a resin having a structure represented by General Formula (2) and a structure represented by General Formula (3). The polymerizable functional groups t are independently selected from an acryloyloxy group and a methacryloyloxy group, and a content of the compound represented by General Formula (1) in the composition is 0.10% by mass or more.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: November 16, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masaki Nonaka, Haruki Mori
  • Patent number: 11175610
    Abstract: An image forming apparatus includes a plurality of image bearers and a rotatable transferor. Images borne on the plurality of image bearers are transferred to the transferor. The transferor has an elastic power larger than an elastic power of each of the plurality of image bearers, and a difference in elastic power between the transferor and a most upstream image bearer in a rotation direction of the transferor is smaller than a difference in elastic power between the transferor and any other image bearer except the most upstream image bearer of the plurality of image bearers.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: November 16, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naohiro Kumagai, Kazuhiko Watanabe
  • Patent number: 11086246
    Abstract: Various variable gloss reduction techniques are disclosed. In one embodiment, a gloss reduction technique is disclosed using a textured roller and a wiper impregnated with fuser oil to create a differential gloss pattern that reduces the gloss of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a combination of heat and pressure to create a differential gloss pattern that reduces the gloss in specific regions of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a differential gloss pattern to generate a security mark on a printed image to prevent against copying or fraudulent misrepresentation of the image.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: August 10, 2021
    Assignee: ELECTRONICS FOR IMAGING, INC.
    Inventors: Leon Williams, Thor Olson
  • Patent number: 11061341
    Abstract: An electrophotographic photosensitive member includes, in sequence, a support, a conductive layer, an undercoat layer, a charge generation layer, and a charge transport layer. The conductive layer is a cured film, and the cured film contains titanium oxide particles doped with niobium. The undercoat layer contains a cured product of a composition that contains an electron transport material having a polymerizable functional group and a resin functionalized with a carboxylic acid derivative.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: July 13, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Nishi, Takashi Anezaki, Taichi Sato, Atsushi Fujii, Kunihiko Sekido
  • Patent number: 10942462
    Abstract: The present disclosure provides an electrophotographic photosensitive member that reduces the accumulation of charge and the leakage which are caused by a repeated use in a long period of time. The electrophotographic photosensitive member has a support, an undercoat layer, a charge generation layer and a charge transport layer in this order, wherein the undercoat layer contains a polyamide resin, and a titanium oxide particle, wherein the titanium oxide particle has been surfacetreated with an organosilicon compound, wherein the undercoat layer satisfies 10???70, where ? represents a degree [%] of hydrophobicity of the titanium oxide particle which has been surfacetreated with the organosilicon compound; and the undercoat layer satisfies 0.015?(?×?)?0.040, where ? represents an average primary particle size [?m] of the titanium oxide particles, and ? represents a weight percentage [wt %] of an Si element of the organosilicon compound with respect to the titanium oxide particle.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: March 9, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yota Ito, Akira Sakakibara, Jumpei Kuno, Shuhei Iwasaki, Kohei Makisumi
  • Patent number: 10831118
    Abstract: A method for producing an electrophotographic photosensitive member having a photosensitive layer and a protective layer above a support in this order includes: forming a coating film for a protective layer by coating a coating liquid for the protective layer for forming the protective layer on the photosensitive layer and curing the coating film for the protective layer, in which the coating liquid for the protective layer contains a solvent, a compound represented by a general formula (1), a compound represented by a general formula (2), and a compound represented by a general formula (3) at a specific ratio. In addition, in an electrophotographic photosensitive member having a photosensitive layer and a protective layer above a support in this order, the protective layer is obtained by curing a coating liquid for the protective layer.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: November 10, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Watanabe, Tsutomu Nishida, Yuka Ishiduka, Atsushi Okuda, Hideharu Shimozawa, Nobuhiro Nakamura, Koichi Nakata, Haruki Mori, Kenichi Kaku
  • Patent number: 10816911
    Abstract: A charging roller for an image forming apparatus is provided, which includes a shaft, an elastic layer disposed around the shaft, and a coating layer formed on the elastic layer, wherein the coating layer includes a urethane resin formed by crosslinking of a polyol mixture with polyisocyanate, and the polyol mixture includes polyester polyol and polyether polyol having 60% by weight or more and 90% by weight or less of an ethylene oxide content.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: October 27, 2020
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Young Phil Ji, Norihiro Harada, Ji Soo Heo
  • Patent number: 10747131
    Abstract: To provide an electrophotographic photosensitive member which does not cause film exfoliation in long-term use. An electrophotographic photosensitive member, having: a support; a layered photosensitive layer; and a protective layer in this order, wherein the protective layer is a single layer, the protective layer includes: at least two specific structures, the two specific structures are included in the protective layer at a mass ratio of 20% or more and 240% or less, and a peak area based on in-plane deformation vibration of terminal olefin (CH2?) of the protective layer and a peak area based on stretching vibration of C?O of acryloyloxy groups, the peak areas being determined by total reflection Fourier transform infrared spectroscopy under conditions where an internal reflection element is Ge, and an incidence angle is 45°, have a fixed relationship.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: August 18, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Watanabe, Tsutomu Nishida, Yuka Ishiduka, Atsushi Okuda, Hideharu Shimozawa, Nobuhiro Nakamura, Daisuke Miura
  • Patent number: 10747164
    Abstract: A photosensitive drum is rotatably supported in a main body. A developing cartridge is detachably mountable on the main body in a state where the photosensitive drum is supported in the main body. The developing cartridge includes a developing device and a frame. The developing device includes a developing roller disposed in confrontation with the photosensitive drum to supply developer to the photosensitive drum when the developing cartridge is mounted in the main body, and a developer-accommodating portion configured to accommodate developer. The frame includes a waste-developer-accommodating portion configured to accommodate waste developer and supports the developing device that is movable relative to the frame. The frame is disposed on an opposite side of the developing roller from the photosensitive drum. An urging member is disposed between the frame and the developing device to urge the developing roller toward the photosensitive drum.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: August 18, 2020
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Shougo Sato, Hirotaka Mori, Makoto Souda
  • Patent number: 10739704
    Abstract: In one example, a system for transferring an image from a photoconductor to a print substrate includes a transfer member having a removable blanket wrapped around a rotatable drum and a laser. The blanket has a light absorbing exterior surface to receive a liquid LEP ink image from the photoconductor and to release a layer of molten toner to a print substrate. As the drum rotates, the laser exposes a width of the exterior surface of the blanket carrying a liquid LEP ink image to a beam of coherent light that delivers enough power to transform the liquid LEP ink image into molten toner.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: August 11, 2020
    Assignee: HP Indigo B.V.
    Inventors: Mark Sandler, Peter Nedelin, Shai Lior
  • Patent number: 10732526
    Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) and contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin includes a polyarylate resin represented by general formula (1). In general formula (1), Q1, Q2, Q3, and Q4 each represent a methyl group or a hydrogen atom. r, s, t, and u each represent a number greater than or equal to 15 and less than or equal to 35.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 4, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi Shimizu, Keiji Maruo, Jun Azuma
  • Patent number: 10670980
    Abstract: Provided is a toner including a crystalline polyester resin including a constitutional unit derived from saturated aliphatic dicarboxylic acid and a constitutional unit derived from saturated aliphatic diol, an amorphous hybrid resin, an amorphous polyester resin, a release agent, and a colorant, wherein the crystalline polyester resin includes a constitutional unit derived from sebacic acid as the constitutional unit derived from the saturated aliphatic dicarboxylic acid, and the amorphous hybrid resin is a composite resin including a polyester-based resin unit and a styrene-based resin unit.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: June 2, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Koh Ohnuma, Tsuyoshi Sugimoto, Shinya Nakayama, Hideyuki Santo, Shin Hasegawa, Suzuka Karato, Kohsuke Nagata
  • Patent number: 10656543
    Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) containing a charge generating material and an electron transport material. The electron transport material includes a compound represented by general formula (1) shown below. An amount of charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer (3) is at least +7.0 ?C/g. In general formula (1), R1 and R2 each represent, independently of each other, a halogen atom, for example. Further, m, n, and Y are as described in the description.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: May 19, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi Shimizu, Hideki Okada
  • Patent number: 10642213
    Abstract: A cleaning blade, which is to be brought into contact with a surface of a photosensitive drum, satisfies the following condition. First, the cleaning blade having a free length of 8 mm is brought into contact with an opposed object for measurement having a plurality of measurement recesses each having a partially spherical shape with a depth of 0.7 ?m and a radius of 15 ?m on a surface so that a linear pressure is 0.196 N/cm and 0.490 N/cm, and a contact angle with respect to the opposed object for measurement is 25°. In this case, a contact width of the cleaning blade in each of the measurement recesses is 4 ?m or more and 8 ?m or less when the linear pressure is 0.196 N/cm and is 4 ?m or more and 13.5 ?m or less when the linear pressure is 0.490 N/cm.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: May 5, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryo Nameki
  • Patent number: 10642174
    Abstract: An electrically conductive support for use in an electrophotographic photoreceptor includes a cylindrical main body having a first end and a second end opposite to the first end in an axial direction of the main body. The main body contains an aluminum alloy and has an internal stress in a range of ?30 MPa to 5 MPa. A method of producing the electrically conductive support includes preparing a substrate containing an aluminum alloy obtained at least through an extrusion step, and heat treating the substrate to obtain the electrically conductive support. The heat treating is carried out such that, when a temperature of the heat treating is defined as T (° C.) and a time of the heat treating is defined as H (hours), an amount of the heat treating Q defined by Q=T×H is 800 or less.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: May 5, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Hirotaka Kobayashi
  • Patent number: 10635009
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, a polycarbonate resin, and a hole transport material. The electron transport material includes a compound having a halogen atom and represented by general formula (1), (2), (3), (4), or (5). The polycarbonate resin has a terminal group having a fluoro group and represented by general formula (10). The hole transport material includes a compound represented by general formula (20), (21), (22), (23), (24), (25), (26), or (27). A charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer is at least +6.5 ?C/g. The photosensitive layer has a Vickers hardness of at least 17.0 HV at 45° C.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: April 28, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Tomofumi Shimizu
  • Patent number: 10635008
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, an additive, and a binder resin. An optical response time is in a range from 0.05 milliseconds to 0.85 milliseconds. The optical response time is a time from irradiation of a surface of the photosensitive layer charged to +800 V with pulse light having a wavelength of 780 nm to surface potential decay of the photosensitive layer from +800 V to +400 V. An optical intensity of the pulse light is set so that the surface potential of the photosensitive layer becomes +200 V from +800 V after 400 milliseconds from pulse light irradiation of the surface of the photosensitive layer charged to the +800 V. The additive includes either of both an ultraviolet absorbing agent and an antioxidant.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: April 28, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yuko Iwashita, Kazunari Hamasaki, Kazutaka Sugimoto
  • Patent number: 10620554
    Abstract: A photoconductor unit includes a photoconductor and an electrode. The photoconductor includes a base member that is cylindrical and has a hardness that decreases with increasing distance from a first end toward a second end in an axial direction, and a photosensitive layer formed on an outer peripheral surface of the base member. The electrode is in contact with an inner peripheral surface of an open end portion of the base member at the first end.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: April 14, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Keishi Araki, Hiroki Ando, Hirofumi Iida
  • Patent number: 10534306
    Abstract: A cylindrical base body of the disclosure includes an outer peripheral surface and an end surface which is connected to the outer peripheral surface. The outer peripheral surface includes a first inclined surface which is inclined inwardly toward the end surface, the end surface includes a second inclined surface which is inclined inwardly toward the outer peripheral surface and is connected to the first inclined surface, and a connecting portion of the first inclined surface and the second inclined surface has a radiused surface.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: January 14, 2020
    Assignee: KYOCERA CORPORATION
    Inventor: Haruki Nakatsugawa
  • Patent number: 10416594
    Abstract: An image forming method includes forming an image with a toner using a photoconductor in which an intermediate layer and a photosensitive layer including a charge generating layer and a charge transport layer are formed overlying an electroconductive substrate, wherein the ionization potential of the surface of the photoconductor and the ionization potential of the surface of the toner satisfy the following relations 1 and 2, |Ip (the surface of the photoconductor)?Ip (the surface of the toner)|?0.18 (eV)?? Relation 1 5.45 (eV)?Ip (the surface of the photoconductor)?5.53 (eV)?? Relation 2 where Ip (the surface of the photoconductor) represents the ionization potential of the surface of the photoconductor and Ip (the surface of the toner) represents the ionization potential of the surface of the toner.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: September 17, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Akihiro Sugino, Keisuke Shimoyama, Ryohta Takahashi
  • Patent number: 10409179
    Abstract: An electrophotographic photoreceptor includes a conductive support, a charge generation layer disposed on the conductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a charge generating material and a vinyl copolymer. The vinyl copolymer includes a structural unit including a chlorine atom, a structural unit including an acyloxy group, and a structural unit including two or more carboxyl groups. The proportion of the structural unit including an acyloxy group to all of the structural units is 13.4 mol % or more and 20.0 mol % or less. The charge transport layer includes a charge transporting material and a binder resin.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: September 10, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masahiko Miyamoto, Hideya Katsuhara, Takeshi Iwanaga
  • Patent number: 10386738
    Abstract: A photoconductor unit includes a photoconductor and an electrode. The photoconductor includes a base member that is cylindrical and has a hardness that decreases with increasing distance from a first end toward a second end in an axial direction, and a photosensitive layer formed on an outer peripheral surface of the base member. The electrode is in contact with an inner peripheral surface of an open end portion of the base member at the first end.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: August 20, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Keishi Araki, Hiroki Ando, Hirofumi Iida
  • Patent number: 10372048
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a hole transport material and a binder resin. The charge transport layer further contains an electron acceptor compound. The hole transport material includes a compound represented by general formula (1). In general formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each represent, independently of one another, a hydrogen atom or a methyl group.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 6, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Jun Azuma, Kensuke Kojima, Tomofumi Shimizu
  • Patent number: 10338507
    Abstract: Provided is an image forming apparatus capable of estimating lives of components more accurately than before. The image forming apparatus includes an ion conductive component, and a processor for estimating a life of the conductive component. The processor acquires an index value related to energization of the conductive component, and estimates the life of the conductive component based on the index value per unit time.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: July 2, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hideo Yamaki, Satoru Shibuya
  • Patent number: 10295917
    Abstract: Provided is an electrophotographic roller including a cylindrical base and an elastic layer on an outer peripheral surface of the base, the base having a joint extending from one end to the other end in a longitudinal direction thereof, at least a part of the joint has a gap penetrating the joint in a thickness direction of the base, and a part of a material for the elastic layer entering the gap and covering a portion of an inner peripheral surface of the base near the gap to form an anchor portion of the elastic layer.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: May 21, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiro Suzuki, Satoru Yamada
  • Patent number: 10241428
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The photosensitive layer has a scratch resistance depth of no greater than 0.50 ?m.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: March 26, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi Shimizu, Keiji Maruo
  • Patent number: 10241429
    Abstract: There is provided an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus that are excellent in charging properties and can suppress residual potential in the case where a strontium titanate particle is used as a metal oxide particle in an undercoat layer of the electrophotographic photosensitive member. An electrophotographic photosensitive member in which an undercoat layer contains a strontium titanate particle having a maximum peak at a position of 2?=32.20±0.20 (? represents a Bragg angle) in a CuK? characteristic X-ray diffraction pattern, the maximum peak having a half-value width of 0.10 deg or more and 0.50 deg or less, and a process cartridge and an electrophotographic apparatus each provided with the electrophotographic photosensitive member.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: March 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Shimada, Kumiko Takizawa, Eileen Takeuchi, Ikuyo Kuroiwa, Wataru Kitamura, Kan Tanabe, Haruhiko Mitsuda
  • Patent number: 10209668
    Abstract: An image forming apparatus in which a developer bearing member is disposed below a cleaning member, which cleans a charging member, so as to overlap with the cleaning member when viewed in a vertical direction and includes a base body and an elastic layer covering the base body and having a width in a longitudinal direction of the developer bearing member that accommodates the entire region of the cleaning member in the longitudinal direction. In the longitudinal direction, the cleaning member is disposed at a position where the entire region thereof in the longitudinal direction is accommodated in the width of the elastic layer.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihisa Matsukawa, Toshiki Okamura, Kuniaki Tamagaki, Takanori Watanabe, Hiroyoshi Iwayama, Makoto Tokudome, Hideo Kihara, Naoki Hayashi
  • Patent number: 10209670
    Abstract: An electrophotographic photosensitive drum unit usable in a process cartridge includes a cylinder having a photosensitive layer at an outer periphery thereof and an axis L1. A drum flange is provided at one end of the cylinder, with the drum flange including a recess formed on an inside thereof and a gear portion provided along an outer surface of the drum flange. A detachable member is detachably attached to the drum flange and overlaps parts of the recess as seen along a direction of the axis L1, with the detachable member being provided within the drum flange in the direction of the axis L1.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahito Ueno, Shigeo Miyabe, Masanari Morioka, Masato Hisano
  • Patent number: 10175590
    Abstract: This electrophotographic photosensitive body (20) comprises a supporting body (20a) and a photosensitive layer (20b) that is formed on the surface of the supporting body (20a). The surface of the photosensitive layer (20b) has an arithmetic mean roughness Ra within the range of from 20 nm to 100 nm (inclusive), a ten-point average roughness Rz within the range of from 0.2 ?m to 1.0 ?m (inclusive) and a mean spacing of profile irregularities Sm of 20 ?m or less in the initial stage of use.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: January 8, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Maki Ike, Ai Takagami, Masaki Kadota, Takahiko Murata, Hisashi Mukataka
  • Patent number: 10152013
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer of a single-layer type disposed on the conductive substrate. The photosensitive layer has an absorption coefficient of 0.008 or less at a wavelength of 1000 nm and contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The charge generating material is at least one selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment and is contained in an amount of 0.9% by weight or more and 1.8% by weight or less relative to the binder resin.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: December 11, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Keisuke Kusano, Yu Nakamura
  • Patent number: 10101679
    Abstract: Provided is an electrographic photoconductor resistant to surface discharge and having good wear resistance. The electrographic photoconductor has a conductive support and a photosensitive layer disposed on the conductive support, the photosensitive layer containing a charge generation material and a charge transport material. A layer forming the surface of the electrographic photoconductor contains a resin binder forming the layer and a layered carbide dispersed in the resin binder. The layer forming the surface has a light transmittance in the range of 20 to 98% at a wavelength of 350 to 800 nm.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: October 16, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seisuke Maeda, Kazunori Kurimoto, Kazuhiro Kuramochi
  • Patent number: 10073363
    Abstract: A photoconductor is provided. The photoconductor includes a cylindrical conductive support, a water-repellent resin film, a coating film, and a flange. The cylindrical conductive support has an end part having an inner circumferential surface having a surface roughness Rz of from 3 to 10 ?m. The water-repellent resin film is on the inner circumferential surface of the end part of the cylindrical conductive support. The coating film is on an outer circumferential surface of the cylindrical conductive support. The flange has a cylindrical fitting part having an outer circumferential surface secured to the inner circumferential surface of the end part of the cylindrical conductive support.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: September 11, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsuaki Hirose, Daisuke Kubo, Hiroshi Hashiguchi
  • Patent number: 10067433
    Abstract: A conductive support is formed of a bottomless hollow cylindrical member being made of metal and having a thickness t of equal to or less than 0.5 mm, the conductive support including: a chamfer portion on an outer peripheral surface side of at least one end of the conductive support over an entire circumferential direction, wherein the chamfer portion has a chamfer angle a of equal to or greater than 10° and less than 30° with respect to the outer peripheral surface, and a chamfer width b equal to or greater than 0.05 mm in an end surface, and wherein an end surface width c is equal to or greater than 0.1 mm in the end surface including the chamfer portion.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: September 4, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Daisuke Haruyama
  • Patent number: 9977357
    Abstract: The object of the present invention is to provide a toner for development of electrostatic images (hereinafter referred to as toner) which, while preventing dust during fixation, secures improved hot offset resistance and is excellent in providing good image quality. The invention relates to the toner that comprises a binder resin, a colorant and a wax, wherein the wax has, while in a state of being contained in the toner, a melting point of from 55° C. to 90° C., and the value Dt of the toner satisfies a specific formula.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: May 22, 2018
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Masaya Ota, Shiho Sano
  • Patent number: 9971258
    Abstract: In an electrophotographic photosensitive member, a circumferential surface has concave portions that are independent one another; each of the concave portions has an opening, a contour of the opening has an apex having an angle ? of more than 0° and 90° or less on at least an upstream side of a rotational direction of the electrophotographic photosensitive member, and has a largest width in an axial direction of the electrophotographic photosensitive member of 20 ?m or more and 80 ?m or less, a width of the contour in the axial direction of the electrophotographic photosensitive member decreasing from a portion having the largest width toward the apex, when viewing each of the concave portions in the axial direction, each of the concave portions has a depth that decreases from a deepest point of each of the concave portions toward the apex.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 15, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Wataru Kitamura, Kenichi Ikari
  • Patent number: 9857735
    Abstract: An endless belt includes a polyimide resin layer in which a content of at least one solvent selected from a solvent group A consisting of a urea solvent, an alkoxy group-containing amide solvent, and an ester group-containing amide solvent is from 50 ppm to 2,000 ppm.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: January 2, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Wataru Yamada, Tsuyoshi Miyamoto, Tomoya Sasaki, Kana Miyazaki
  • Patent number: 9851646
    Abstract: Provided is an electrophotographic apparatus, including an electrophotographic photosensitive member, a charging unit arranged in a non-abutment manner with respect to the electrophotographic photosensitive member, a cleaning unit or a developing unit arranged in abutment against the electrophotographic photosensitive member, and a transferring unit.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: December 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Tomono, Daisuke Miura, Takashi Anezaki, Yota Ito, Harunobu Ogaki
  • Patent number: 9851656
    Abstract: A developing roller includes a conductive axis body; a conductive elastic layer overlying the conductive axis body; and a toner bearing layer overlying the conductive elastic layer and having a surface dispersed with particles having an average particle diameter of from 11 nm to 40 nm. The rotary torque is from 2.5 N to 3.5 N.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: December 26, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keiichiro Juri, Makoto Matsushita, Hideaki Yasunaga
  • Patent number: 9843010
    Abstract: Organic EL elements are configured so that at least a hole injection layer and a light-emitting layer are laminated between a first electrode and a second electrode, and a bank defines an area in which the light-emitting layer is to be formed. An inner portion of the hole injection layer is depressed to define a recess. An upper peripheral edge of the recess is covered with a part of the bank.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: December 12, 2017
    Assignee: JOLED INC.
    Inventor: Seiji Nishiyama
  • Patent number: 9829834
    Abstract: A flywheel includes a rotation shaft, a flywheel body, and a protruding body. A first end of the rotation shaft is supported by a rotating body. The flywheel body is provided at a second end of the rotation shaft and rotates together with the rotation shaft. The protruding body protrudes from a surface at a rotating-body side of the flywheel body and extends in a circumferential direction of the rotation shaft.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: November 28, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kentaro Iwamoto, Kazuyoshi Hagiwara, Akira Takahashi, Mihoko Tanaka, Arichika Tanaka, Yusuke Sakai
  • Patent number: 9823614
    Abstract: To reduce the influence of a coupling pin that fixes a shaft to a photoreceptor drum on rotation of a photoreceptor drum. To provide photoreceptor device including: a photoreceptor drum having an insertion hole formed along a lengthwise direction; and a flange that is provided at a lengthwise end portion of the photoreceptor drum and has a through hole formed thereon at a position to overlap the insertion hole, wherein the flange has a first protruding portion and a second protruding portion that: are provided on an end surface at which the through hole is provided and around the through hole; and protrude from the end surface, the first protruding portion has a first opening at a position facing the through hole, and the second protruding portion is provided at a position opposite to the first opening across a center of the through hole on the end surface.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: November 21, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Yuji Ogawa, Keiichi Kurokawa
  • Patent number: 9811011
    Abstract: Provided are an electrophotographic photosensitive member comprising: a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer, on which the undercoat layer contains one of a compound represented by the formula (1) and a polymer of a composition containing the compound represented by the formula (1).
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masashi Nishi, Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Akihito Saitoh
  • Patent number: 9807254
    Abstract: Systems, apparatuses and methods are provided to allow for detection of an impact to an output apparatus. Such impact may be caused by a sudden force applied to one or more points on the apparatus housing or another part of the apparatus accessible from outside the apparatus housing. An impact detector outputs to an apparatus controller an impact report including impact time and impact data corresponding to the detected impact event.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: October 31, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Tom Haapanen
  • Patent number: 9804512
    Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer which contains a metal oxide particle and is formed on the support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer. Either or both of the undercoat layer and the charge generating layer contain a compound represented by formula (1).
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: October 31, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryoichi Tokimitsu, Yuka Ishiduka, Wataru Kitamura, Mai Murakami, Kan Tanabe
  • Patent number: 9733595
    Abstract: An image forming apparatus includes an image forming unit including an image carrier; a transfer unit including a transfer belt that is in contact with the image carrier in a transfer region, a transfer roller that presses the transfer belt against the image carrier, and a press-contact member that presses the transfer belt toward the image carrier; and a fixing unit including a pair of fixing members that form a fixing region and fix the toner image onto the sheet by nipping the sheet. The transfer roller and the press-contact member are disposed at positions such that a part of the transfer roller and a part of the press-contact member are on the image carrier side of a tangent plane that is tangent to the image carrier in the transfer region and that passes through an upstream edge of the fixing region in a sheet transport direction.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 15, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Daisuke Tanaka
  • Patent number: 9726995
    Abstract: A brilliant toner includes toner particles that include a binder resin having a ratio (Mz/Mn) of a Z average molecular weight (Mz) to a number average molecular weight (Mn) of 5 to 20 and a peak top molecular weight (Mp) of 3,000 to 10,000, and a flake-shaped brilliant pigment.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinya Sakamoto, Kazuhiko Nakamura, Masaru Takahashi
  • Patent number: 9720366
    Abstract: A drive element for a rotatable component of an electrophotographic image forming device according to one example embodiment includes a body having a center hole for receiving a drive shaft therein. The center hole defines a rotational axis of the body. A drive coupler is positioned on the body and centered around the rotational axis. A drive slot on the body extends radially relative to the rotational axis and is sized to receive a cross pin. The drive slot includes one or more snap features formed on the body that are positioned to retain the cross pin axially in the drive slot and that permit the cross pin to snap axially into and out of the drive slot.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: August 1, 2017
    Assignee: Lexmark International, Inc.
    Inventor: Jeffrey Lawrence Tonges
  • Patent number: 9709906
    Abstract: The present invention is to provide a charge transport substance having high resistance to stress within electrophotographic processes, an electrophotographic photoreceptor which has excellent high-speed responsiveness, shows a sufficient residual potential, and has high resistance to stress within electrophotographic processes, an electrophotographic cartridge, and an image-forming apparatus. The invention provides a charge transport substance having a specific structure. The invention further provides an electrophotographic photoreceptor including a photosensitive layer which contains the charge transport substance having a specific structure, an electrophotographic cartridge, and an image-forming apparatus, equipped with this electrophotographic photoreceptor.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 18, 2017
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Mitsuo Wada