Patents by Inventor Kouichi Uchida

Kouichi Uchida 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).

  • Publication number: 20210103236
    Abstract: An electrophotographic member capable of further reducing adhesion of a toner to an outer surface. The electrophotographic member comprises a base layer and a surface layer laminated in this order in a thickness direction of the electrophotographic member, the surface layer containing a binder resin, perfluoropolyether, and an ionic liquid, a content of the perfluoropolyether with respect to the binder resin being 20% by mass or more and 100% by mass or less, and a contact angle of a surface on a side of the surface layer that is opposite to a side facing the base layer with respect to hexadecane being 65° or more.
    Type: Application
    Filed: October 2, 2020
    Publication date: April 8, 2021
    Inventors: Masahiro Takenaga, Keisuke Abe, Kenji Onuma, Kouichi Uchida
  • Patent number: 10866543
    Abstract: An electrophotographic belt including an electro-conductive layer having high adhesion to a base layer while maintaining high electro-conductivity. The electrophotographic belt has an endless shape, and includes an endless shaped base layer containing a polyester resin, and an electro-conductive layer covering an inner surface of the base layer, the electro-conductive layer containing an electro-conductive particle and a binder resin, and the binder resin containing a polyester resin having at least two monomer units of phthalic acids selected from the group consisting of terephthalic acid, orthophthalic acid and isophthalic acid.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: December 15, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Eiichi Hamana, Noriaki Egawa, Kouichi Uchida
  • Patent number: 10859951
    Abstract: An electrophotographic belt that, despite long-term usage, is not susceptible to unevenness in cleaning by a cleaning blade in a width direction. The electrophotographic belt has an endless shape and has grooves on an outer circumferential surface thereof, the grooves each extending in a circumferential direction of the electrophotographic belt, when equally dividing a groove-formed area of the outer circumferential surface into three areas in a direction orthogonal to the circumferential direction of the electrophotographic belt, and calculating average values of depths of the grooves contained in the three areas respectively to obtain Dm, De1 and De2, where Dm is an average value of depths of the grooves in a central area, De1 and De2 are average values of depths of the grooves contained in both ends areas, Dm, De1 and De2 satisfy equations (1) and (2): Dm<De1??(1) Dm<De2??(2).
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: December 8, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasuhiro Matsuo, Kouichi Uchida, Masatsugu Toyonori
  • Publication number: 20200363756
    Abstract: An electrophotographic belt including an electro-conductive layer having high adhesion to a base layer while maintaining high electro-conductivity. The electrophotographic belt has an endless shape, and includes an endless shaped base layer containing a polyester resin, and an electro-conductive layer covering an inner surface of the base layer, the electro-conductive layer containing an electro-conductive particle and a binder resin, and the binder resin containing a polyester resin having at least two monomer units of phthalic acids selected from the group consisting of terephthalic acid, orthophthalic acid and isophthalic acid.
    Type: Application
    Filed: May 7, 2020
    Publication date: November 19, 2020
    Inventors: Eiichi Hamana, Noriaki Egawa, Kouichi Uchida
  • Publication number: 20200341408
    Abstract: Provided an electrophotographic belt that, despite long-term usage, is not susceptible to unevenness in cleaning by a cleaning blade in a width direction.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 29, 2020
    Inventors: Yasuhiro Matsuo, Kouichi Uchida, Masatsugu Toyonori
  • Patent number: 10698347
    Abstract: Provided is an electrophotographic belt having excellent creep resistance and digital reproducibility. The electrophotographic belt is composed of a biaxially stretched cylindrical film, and the film includes a matrix including a thermoplastic resin and an electroconductive domain including an ionic electroconductive agent, and when a surface resistivity of the film in a circumferential direction is defined as A, and a surface resistivity of the film in a direction orthogonal to the circumferential direction is defined as B, A?B is satisfied, and a tensile modulus of elasticity of the film in the circumferential direction is 1.0 GPa or more and 3.0 GPa or less.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: June 30, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kouichi Uchida
  • Publication number: 20200174405
    Abstract: Provided is an electrophotographic belt having excellent creep resistance and digital reproducibility. The electrophotographic belt is composed of a biaxially stretched cylindrical film, and the film includes a matrix including a thermoplastic resin and an electroconductive domain including an ionic electroconductive agent, and when a surface resistivity of the film in a circumferential direction is defined as A, and a surface resistivity of the film in a direction orthogonal to the circumferential direction is defined as B, A?B is satisfied, and a tensile modulus of elasticity of the film in the circumferential direction is 1.0 GPa or more and 3.0 GPa or less.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 4, 2020
    Inventor: Kouichi Uchida
  • Patent number: 10551771
    Abstract: Provided is an electrophotographic belt sustainably excellent in toner removal performance. The electrophotographic belt has an endless shape and has grooves on an outer surface thereof, each of the grooves extending in a circumferential direction and being in non-parallel with the circumferential direction, and the outer surface is composed only of a first region in which the number of the grooves in a direction orthogonal to the circumferential direction is “n” and a second region in which the number of the grooves in the direction orthogonal to the circumferential direction is larger than the “n”, the first region and the second region being arranged alternately in the circumferential direction, and the “n” being an integer of 1 or more.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: February 4, 2020
    Assignee: CANON KABUSKIKI KAISHA
    Inventors: Kouichi Uchida, Koujirou Izumidate, Noriaki Egawa, Masatsugu Toyonori, Shuji Saito, Yasuhiro Matsuo, Takashi Endo, Kosuke Saito
  • Publication number: 20190324386
    Abstract: Provided is an electrophotographic belt sustainably excellent in toner removal performance. The electrophotographic belt has an endless shape and has grooves on an outer surface thereof, each of the grooves extending in a circumferential direction and being in non-parallel with the circumferential direction, and the outer surface is composed only of a first region in which the number of the grooves in a direction orthogonal to the circumferential direction is “n” and a second region in which the number of the grooves in the direction orthogonal to the circumferential direction is larger than the “n”, the first region and the second region being arranged alternately in the circumferential direction, and the “n” being an integer of 1 or more.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 24, 2019
    Inventors: Kouichi Uchida, Koujirou Izumidate, Noriaki Egawa, Masatsugu Toyonori, Shuji Saito, Yasuhiro Matsuo, Takashi Endo, Kosuke Saito
  • Publication number: 20180173136
    Abstract: An electrophotographic belt with the occurrence frequency of convex portions derived from zirconium-containing compound that cause scratches on a photosensitive drum being suppressed as much as possible is provided. The electrophotographic belt has a resin layer comprising a melt-kneaded product comprising a thermoplastic polyester resin, a polyether ester amide, and a zirconium-containing compound, wherein the number of convex portions derived from the zirconium-containing compound per unit area (1.0 m2) on the outer surface of the electrophotographic belt is 10 pieces or less.
    Type: Application
    Filed: December 4, 2017
    Publication date: June 21, 2018
    Inventor: Kouichi Uchida
  • Patent number: 9933713
    Abstract: Provided is an electro-conductive belt including an electro-conductive resin layer. The electro-conductive resin layer includes a matrix containing a thermoplastic resin having at least one bond selected from the group consisting of an amide bond, an ester bond and a carbonate bond, a domain containing an ionic liquid containing a hexafluorophosphate anion or an anion expressed by formula (1), and particles containing a silicone resin having a structure expressed by formula (2): R0—SiO3/2.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: April 3, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kouichi Uchida
  • Patent number: 9753411
    Abstract: Concerned with a cylindrical conductive belt for electrophotography which has made permanent curl less occur. The conductive belt has a continuous phase containing a thermoplastic polyester resin and discontinuous phases each containing any one or both selected from a polyether-ester amide and a polyether amide, and the discontinuous phases are present in such way as to extend in the peripheral direction of the belt; the belt having a crystallinity that is lower on the outer-peripheral surface side than on the inner-peripheral surface side.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: September 5, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouichi Uchida, Hiroomi Kojima
  • Patent number: 9744732
    Abstract: A high-quality electrophotographic endless belt and a method capable of efficiently producing the belt are provided. A method for producing an electrophotographic endless belt comprising a base layer including a thermoplastic resin composition and an inner-surface layer, which includes: (1) forming an energy curable film having a glass transition temperature on an inner surface of a test tube-shaped preform including a thermoplastic resin and then subjecting the preform to blow molding to obtain a blow-molded bottle; (2) irradiating the blow-molded bottle with energy rays to cure the film to form an inner-surface layer; and (3) cutting out an endless belt from the blow-molded bottle having the inner-surface layer obtained in (2).
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: August 29, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kouichi Uchida
  • Publication number: 20170168405
    Abstract: An electrophotographic member capable of maintaining stable quality regardless of environment in forming a surface layer is provided. The electrophotographic member includes a base layer and a surface layer. The surface layer includes a heteroaggregate of inorganic oxide particles, electro-conductive metal oxide particles different from the inorganic oxide particles, and an ionic liquid.
    Type: Application
    Filed: December 8, 2016
    Publication date: June 15, 2017
    Inventors: Kouichi Uchida, Eiichi Hamana, Noriaki Egawa
  • Patent number: 9261803
    Abstract: An electrophotographic belt which enables the suppression of bleeding of an electrolyte while minimizing influence on its surface smoothness. The electrophotographic belt showing electroconductivity resulting from dissociation of an electrolyte is made of a resin composition containing a crystalline resin as a binder resin, an oil-soluble dye and an electrolyte.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: February 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kouichi Uchida
  • Publication number: 20160031171
    Abstract: A high-quality electrophotographic endless belt and a method capable of efficiently producing the belt are provided. A method for producing an electrophotographic endless belt comprising a base layer including a thermoplastic resin composition and an inner-surface layer, which includes: (1) forming an energy curable film having a glass transition temperature on an inner surface of a test tube-shaped preform including a thermoplastic resin and then subjecting the preform to blow molding to obtain a blow-molded bottle; (2) irradiating the blow-molded bottle with energy rays to cure the film to form an inner-surface layer; and (3) cutting out an endless belt from the blow-molded bottle having the inner-surface layer obtained in (2).
    Type: Application
    Filed: October 8, 2015
    Publication date: February 4, 2016
    Inventor: Kouichi Uchida
  • Publication number: 20150355561
    Abstract: Provided is an electro-conductive belt including an electro-conductive resin layer. The electro-conductive resin layer includes a matrix containing a thermoplastic resin having at least one bond selected from the group consisting of an amide bond, an ester bond and a carbonate bond, a domain containing an ionic liquid containing a hexafluorophosphate anion or an anion expressed by formula (1), and particles containing a silicone resin having a structure expressed by formula (2): R0—SiO3/2.
    Type: Application
    Filed: June 3, 2015
    Publication date: December 10, 2015
    Inventor: Kouichi Uchida
  • Publication number: 20150205230
    Abstract: Concerned with a cylindrical conductive belt for electrophotography which has made permanent curl less occur. The conductive belt has a continuous phase containing a thermoplastic polyester resin and discontinuous phases each containing any one or both selected from a polyether-ester amide and a polyether amide, and the discontinuous phases are present in such way as to extend in the peripheral direction of the belt; the belt having a crystallinity that is lower on the outer-peripheral surface side than on the inner-peripheral surface side.
    Type: Application
    Filed: April 1, 2015
    Publication date: July 23, 2015
    Inventors: Kouichi Uchida, Hiroomi Kojima
  • Patent number: 9034476
    Abstract: Concerned with a cylindrical conductive belt for electrophotography which has made permanent curl less occur. The conductive belt has a continuous phase containing a thermoplastic polyester resin and discontinuous phases each containing any one or both selected from a polyether-ester amide and a polyether amide, and the discontinuous phases are present in such way as to extend in the peripheral direction of the belt; the belt having a crystallinity that is lower on the outer-peripheral surface side than on the inner-peripheral surface side.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 19, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouichi Uchida, Hiroomi Kojima
  • Patent number: 9017591
    Abstract: A method capable of efficiently manufacturing a high-quality seamless belt for electrophotography is provided. The method is a method for manufacturing a seamless belt for electrophotography including a base layer having a thermoplastic resin composition, and a surface layer, wherein the method includes: (1) forming an energy curable coated film having a glass transition temperature on an outer surface of a test tube-shaped preform including a thermoplastic resin; then blow molding the preform to obtain a blow bottle; (2) irradiating the blow bottle with an energy ray to cure the coated film to thereby form the surface layer; and (3) cutting out a seamless belt from the blow bottle obtained in (2) and having a surface layer.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kouichi Uchida