Patents by Inventor Ryo Ishifuji

Ryo Ishifuji 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: 11644777
    Abstract: Provided is a pressurizing member including a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer, the surface layer containing a fluorine resin, wherein the surface layer has a surface resistivity of 1×1011[?/?] or less at a temperature of 25° C. when applying a DC voltage of 500 V, and a thermal conductivity ? in a thickness direction of the surface layer is 0.093 [W/(m·K)] or less.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: May 9, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryo Ishifuji, Hiroki Muramatsu, Yasuharu Notoya, Yohei Miyauchi, Naoko Kasai, Yusuke Baba, Masaaki Takahashi
  • Patent number: 11561495
    Abstract: A pressing rotating member comprising a base layer, an elastic layer and a surface layer, in this order, the surface layer having pores, wherein when placing an observation region of 8 ?m long×11 ?m wide at a cross section of the surface layer in a thickness direction of the surface layer—a direction perpendicular to a circumferential direction of the pressing rotating member, a degree of orientation f of the pores observed in the observation region is 0.20 or higher, and an orientation angle ? of the pores observed in the observation region is 0° to 10°.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: January 24, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoko Kasai, Yohei Miyauchi, Yasuharu Notoya, Takuji Oishi, Yasuhiro Miyahara, Masaaki Takahashi, Yusuke Baba, Hiroki Muramatsu, Ryo Ishifuji
  • Publication number: 20220390885
    Abstract: Provided is a pressurizing member including a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer, the surface layer containing a fluorine resin, wherein the surface layer has a surface resistivity of 1×1011[?/?] or less at a temperature of 25° C. when applying a DC voltage of 500 V, and a thermal conductivity ? in a thickness direction of the surface layer is 0.093 [W/(m·K)] or less.
    Type: Application
    Filed: May 27, 2022
    Publication date: December 8, 2022
    Inventors: Ryo Ishifuji, Hiroki Muramatsu, Yasuharu Notoya, Yohei Miyauchi, Naoko Kasai, Yusuke Baba, Masaaki Takahashi
  • Publication number: 20220206421
    Abstract: A fixing rotating member comprising a base layer, an elastic layer and a surface layer, in this order, the surface layer containing PFA and PFPE, and having pores with openings at a first surface; at least part of the pores containing the PFPE, wherein when after removing the PFPE in the pores, placing a first observation region on the first surface, defining a ratio of a sum of areas of the openings in the first observation region relative to an area of the first observation region as P1; and placing a second observation region in a cross section of the surface layer, and defining a ratio of a sum of areas of the pores in the second observation region relative to an area of the second observation region as P2, P2/P1 is 1.3 or higher.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 30, 2022
    Inventors: Yohei Miyauchi, Yasuharu Notoya, Naoko Kasai, Yusuke Baba, Masaaki Takahashi, Hiroki Muramatsu, Ryo Ishifuji
  • Publication number: 20220206420
    Abstract: A pressing rotating member comprising a base layer, an elastic layer and a surface layer, in this order, the surface layer having pores, wherein when placing an observation region of 8 ?m long×11 ?m wide at a cross section of the surface layer in a thickness direction of the surface layer—a direction perpendicular to a circumferential direction of the pressing rotating member, a degree of orientation f of the pores observed in the observation region is 0.20 or higher, and an orientation angle ? of the pores observed in the observation region is 0° to 10°.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 30, 2022
    Inventors: Naoko Kasai, Yohei Miyauchi, Yasuharu Notoya, Takuji Oishi, Yasuhiro Miyahara, Masaaki Takahashi, Yusuke Baba, Hiroki Muramatsu, Ryo Ishifuji
  • Publication number: 20220206419
    Abstract: Provided is a fixing rotating member capable of maintaining high toner releasability over longer periods of time than in conventional instances and that is capable of maintaining abrasion resistance against paper; the fixing rotating member comprises a base layer, an elastic layer, and a surface layer, in this order; the surface layer containing a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer and a perfluoropolyether; the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer having pores formed therein; the surface layer has pores with openings at a first surface thereof, and constituting an outer surface of the fixing rotating member; at least part of the pores containing the perfluoropolyether; a content of the perfluoropolyether in the surface layer is 20 mass % to 60 mass %; and a degree of orientation A of molecules of the tetrafluoroethylene-perfluoroalkyl vinyl ether in a direction perpendicular to a circumferential direction of the surface layer is 35 to 75%.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 30, 2022
    Inventors: Hiroki Muramatsu, Ryo Ishifuji, Yohei Miyauchi, Yasuharu Notoya, Yusuke Baba, Masaaki Takahashi, Naoko Kasai