Patents by Inventor Hideya Arimura

Hideya Arimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9939746
    Abstract: The electrophotographic member includes an electroconductive substrate and an electroconductive surface layer. The surface layer contains an electroconductivity imparting agent and a polyrotaxane including a first and a second polyrotaxane molecule. The first polyrotaxane molecule includes a first cyclic molecule, and the second polyrotaxane molecule includes a second cyclic molecule. The cyclic molecules of the first and the second polyrotaxane molecules are bound in such a manner that the oxygen atom of a hydroxy group of the first cyclic molecule and the oxygen atom of a hydroxy group of the second cyclic molecule are bound with a structure represented by the following formula (1): *—R1—Z—R2—** In this formula, z represents a linking group, and “*” and “**” represent binding sites to be bound to either of the oxygen atoms derived from the hydroxy groups of the first and the second cyclic molecule. R1 and R2 each represent a specific structure.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: April 10, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideya Arimura, Shohei Urushihara
  • Publication number: 20180011418
    Abstract: Provided is an electrophotographic member including an electro-conductive substrate and a surface layer on the substrate. The surface layer contains a urethane resin and a first polymer having a specific nitrogen-containing structure. The urethane resin has a structure derived from a second polymer containing a fluorine atom or a structure derived from a third polymer containing a fluorine atom and a silicon atom. The surface layer contains nitrogen atoms derived from the nitrogen-containing structure at a specific ratio in a region from the outer surface of the surface layer to a depth of 300 nm, and the atomic ratios of nitrogen atoms, fluorine atoms, and silicon atoms in a region from a depth of 100 nm from the outer surface of the surface layer to a depth of 300 nm and a region from the outer surface to a depth of 10 nm have specific relationships.
    Type: Application
    Filed: June 27, 2017
    Publication date: January 11, 2018
    Inventors: HIDEYA ARIMURA, Shohei Urushihara, Masaki Yamada
  • Publication number: 20170329251
    Abstract: The present invention provides an electrophotographic member which has a high ability to impart charge to toners while the charge imparting ability is unlikely to be reduced even under an environment at high temperature and high humidity. The electrophotographic member comprises a substrate, an elastic layer formed on the substrate, an intermediate layer covering the surface of the elastic layer, and a surface layer covering the surface of the intermediate layer, wherein the intermediate layer contains a binder resin and a polymer having a specific structure, the surface layer contains silicon oxide, and the surface layer has a thickness of 10 nm or more and 300 nm or less.
    Type: Application
    Filed: April 21, 2017
    Publication date: November 16, 2017
    Inventors: Shohei Urushihara, Masaki Yamada, Takashi Koyanagi, Hideya Arimura
  • Patent number: 9811009
    Abstract: The present invention provides an electrophotographic member in which an increase in resistance is small even in use at low temperature and which contributes to the formation of a high quality electrophotographic image, and a process cartridge and an electrophotographic apparatus using this electrophotographic member as a charging member or a developer carrying member. Therefore, the electrophotographic member of the present invention is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer includes a urethane resin and an ion-conductive agent, the urethane resin has, between two adjacent urethane bonds, a structure represented by formula (1) and at least one structure selected from the group consisting of a structure represented by formula (2) and a structure represented by formula (3), and the ion-conductive agent contains a particular anion.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masaki Yamada, Sosuke Yamaguchi, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20170227880
    Abstract: Provided is an electrophotographic member that is excellent in charge-imparting performance for a toner, and that hardly causes tackiness on its surface even when placed under a high-temperature and high-humidity environment over a long time period. The electrophotographic member includes a substrate and a surface layer, in which the surface layer satisfies the following requirements (A) and (B): (A) the surface layer contains, in a region from its surface to a depth of up to 0.1 ?m, a copolymer containing a constituent unit represented by the following structural formula (1), and at least one selected from the group consisting of a constituent unit represented by the following structural formula (2) and a constituent unit represented by the following structural formula (3); and (B) the concentration of a nitrogen atom derived from a nitrogen-containing aromatic heterocyclic amine structure in the copolymer is from 6.0 mass % to 30.0 mass %.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 10, 2017
    Inventors: Takashi Koyanagi, Masaki Yamada, Shohei Urushihara, Hideya Arimura
  • Publication number: 20170160654
    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: Application
    Filed: November 29, 2016
    Publication date: June 8, 2017
    Inventors: Hideya Arimura, Shohei Urushihara, Masaki Yamada
  • Patent number: 9665028
    Abstract: An electrophotographic member having a high conductivity and having high adhesiveness to other layer, and a process cartridge and an electrophotographic apparatus using the electrophotographic member as a developer carrying member are provided. The electrophotographic member is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer has a resin having a structure represented by the following structural formula (1), and an anion.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: May 30, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideya Arimura, Masaki Yamada, Kazuhiro Yamauchi, Satoru Nishioka
  • Patent number: 9639009
    Abstract: The present invention provides a highly electro-conductive electrophotographic member which contributes to formation of high-quality electrophotographic images while bleeding out of an ion conducting agent is reduced, a process cartridge, and an electrophotographic apparatus. Accordingly, the electrophotographic member according to the present invention includes an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer contains a resin synthesized from a nitrogen-containing aromatic heterocyclic cation and a compound being able to react with the nitrogen-containing aromatic heterocyclic cation, and an anion; the nitrogen-containing aromatic heterocyclic cation has two substituents bonded to hydroxyl groups; and the substituent bonded to the hydroxyl group is bonded to a nitrogen atom of a nitrogen-containing aromatic heterocycle of the nitrogen-containing aromatic heterocyclic cation.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: May 2, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Sosuke Yamaguchi, Masaki Yamada, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Patent number: 9599913
    Abstract: An electrophotographic member is provided in which conductivity barely reduces and sufficient conductivity is obtained even under a low temperature and low humidity environment, a reduction in resistance beyond necessity is readily suppressed even under a high temperature and high humidity environment, and the bleeding of the quaternary ammonium salt can be suppressed.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: March 21, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoru Nishioka, Kazuhiro Yamauchi, Masahiro Watanabe, Masaki Yamada, Hideya Arimura
  • Publication number: 20160370719
    Abstract: The electrophotographic member includes an electroconductive substrate and an electroconductive surface layer. The surface layer contains an electroconductivity imparting agent and a polyrotaxane including a first and a second polyrotaxane molecule. The first polyrotaxane molecule includes a first cyclic molecule, and the second polyrotaxane molecule includes a second cyclic molecule. The cyclic molecules of the first and the second polyrotaxane molecules are bound in such a manner that the oxygen atom of a hydroxy group of the first cyclic molecule and the oxygen atom of a hydroxy group of the second cyclic molecule are bound with a structure represented by the following structural formula (1): *-R1-Z-R2-** In this formula, z represents a linking group, and signs “*” and “**” represent binding sites to be bound to either of the oxygen atoms derived from the hydroxy groups of the first and the second cyclic molecule. R1 and R2 each represent a specific structure.
    Type: Application
    Filed: June 15, 2016
    Publication date: December 22, 2016
    Inventors: Hideya Arimura, Shohei Urushihara
  • Publication number: 20160363881
    Abstract: An electro-conductive member for electrophotography contributing to stable formation of high-quality electrophotographic images under a variety of environments is provided. The electro-conductive member has an electro-conductive substrate, an elastic layer on the substrate, and an electro-conductive surface layer covering a surface of the elastic layer, wherein the electro-conductive surface layer contains a matrix in which a urethane resin and a silicon oxide exist in a non-phase-separated state, and the matrix has a peak of a Si—N bond derived from a polysilazane in a wavelength region from 800 cm?1 or higher and 950 cm?1 or lower in an infrared absorption spectrum of the matrix.
    Type: Application
    Filed: June 1, 2016
    Publication date: December 15, 2016
    Inventors: Shohei Urushihara, Hideya Arimura
  • Publication number: 20160187809
    Abstract: Provided is a member for electrophotography that is not reduced in charge-providing performance even by its long-term storage and use under a high-temperature and high-humidity environment, and is hence conducive to the formation of a high-quality electrophotographic image. The member for electrophotography includes: an electroconductive substrate; and an electroconductive layer, in which: the electroconductive layer contains a resin having a cationic organic group in a molecule thereof and an anion; a total sum of contents of an alkali metal and an alkali earth metal in the electroconductive layer is 500 ppm or less; and the anion includes at least one selected from the group consisting of a fluorosulfonate anion, a fluorocarboxylate anion, a fluorosulfonylimide anion, a fluorosulfonylmethide anion, a fluoroalkylfluoroborate anion, a fluorophosphate anion, a fluoroantimonate anion, and a fluoroarsenate anion.
    Type: Application
    Filed: December 17, 2015
    Publication date: June 30, 2016
    Inventors: Sosuke Yamaguchi, Masaki Yamada, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20160187801
    Abstract: Provided is an electrophotographic member capable of forming a high-quality electrophotographic image. The electrophotographic member includes an electroconductive substrate and an electroconductive resin layer on the electroconductive substrate, in which the electroconductive resin layer contains a resin having, in the molecule, a specific cation structure, and a specific anion.
    Type: Application
    Filed: December 17, 2015
    Publication date: June 30, 2016
    Inventors: Masaki Yamada, Sosuke Yamaguchi, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20150331341
    Abstract: The present invention provides a highly electro-conductive electrophotographic member which contributes to formation of high-quality electrophotographic images while bleeding out of an ion conducting agent is reduced, a process cartridge, and an electrophotographic apparatus. Accordingly, the electrophotographic member according to the present invention includes an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer contains a resin synthesized from a nitrogen-containing aromatic heterocyclic cation and a compound being able to react with the nitrogen-containing aromatic heterocyclic cation, and an anion; the nitrogen-containing aromatic heterocyclic cation has two substituents bonded to hydroxyl groups; and the substituent bonded to the hydroxyl group is bonded to a nitrogen atom of a nitrogen-containing aromatic heterocycle of the nitrogen-containing aromatic heterocyclic cation.
    Type: Application
    Filed: May 18, 2015
    Publication date: November 19, 2015
    Inventors: Sosuke Yamaguchi, Masaki Yamada, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20150331346
    Abstract: Provided is an electrophotographic electroconductive member in which an excessive decrease in resistance of an electroconductive roller in a high-temperature/humidity environment is suppressed and an electric resistance value in a low-temperature/humidity environment is reduced, and thus the electric resistance value is optimized without depending on use conditions and a usage environment. Also provided are a process cartridge and an electrophotographic apparatus that contribute to the stable formation of an electrophotographic image of high quality over a long period of time. The electrophotographic electroconductive member includes an electroconductive mandrel and an electroconductive resin layer formed on an outer periphery of the electroconductive mandrel. The electroconductive resin layer contains a cation and at least one kind of a bis(oxalato)borate anion or a tris(oxalato)phosphate anion.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 19, 2015
    Inventors: Kazuhiro Yamauchi, Satoru Nishioka, Masaki Yamada, Sosuke Yamaguchi, Hideya Arimura
  • Publication number: 20150331347
    Abstract: Provided is an electrophotographic member that has a high excessive charging-suppressing effect under a low-temperature and low-humidity environment, and has high charge-providing performance under a high-temperature and high-humidity environment, and a process cartridge and an electrophotographic apparatus each including the electrophotographic member. The electrophotographic member is an electrophotographic member including an electro-conductive substrate and an electro-conductive resin layer, the electro-conductive resin layer contains a cation and at least one anion selected from the group consisting of anions represented by the following formulae (1) to (5): where X represents an arbitrary halogen atom, n in the structural formula (4) represents an integer of from 2 to 6, and n in the structural formula (5) represents an integer of 2 or 3.
    Type: Application
    Filed: May 12, 2015
    Publication date: November 19, 2015
    Inventors: Hideya Arimura, Masaki Yamada, Sosuke Yamaguchi, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20150331339
    Abstract: The present invention provides an electrophotographic member in which an increase in resistance is small even in use at low temperature and which contributes to the formation of a high quality electrophotographic image, and a process cartridge and an electrophotographic apparatus using this electrophotographic member as a charging member or a developer carrying member. Therefore, the electrophotographic member of the present invention is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer includes a urethane resin and an ion-conductive agent, the urethane resin has, between two adjacent urethane bonds, a structure represented by formula (1) and at least one structure selected from the group consisting of a structure represented by formula (2) and a structure represented by formula (3), and the ion-conductive agent contains a particular anion.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 19, 2015
    Inventors: Masaki Yamada, Sosuke Yamaguchi, Hideya Arimura, Kazuhiro Yamauchi, Satoru Nishioka
  • Publication number: 20140287899
    Abstract: An electrophotographic member is provided in which conductivity barely reduces and sufficient conductivity is obtained even under a low temperature and low humidity environment, a reduction in resistance beyond necessity is readily suppressed even under a high temperature and high humidity environment, and the bleeding of the quaternary ammonium salt can be suppressed.
    Type: Application
    Filed: June 4, 2014
    Publication date: September 25, 2014
    Inventors: Satoru Nishioka, Kazuhiro Yamauchi, Masahiro Watanabe, Masaki Yamada, Hideya Arimura
  • Publication number: 20140221184
    Abstract: An electrophotographic member having a high conductivity and having high adhesiveness to other layer, and a process cartridge and an electrophotographic apparatus using the electrophotographic member as a developer carrying member are provided. The electrophotographic member is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer has a resin having a structure represented by the following structural formula (1), and an anion.
    Type: Application
    Filed: April 21, 2014
    Publication date: August 7, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideya Arimura, Masaki Yamada, Kazuhiro Yamauchi, Satoru Nishioka