Patents by Inventor Yasuyuki Hayasaki

Yasuyuki Hayasaki 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: 20210364954
    Abstract: A fixing member 10 for an electrophotographic device includes a base layer 12, a metal layer 14 formed on the based layer 12, and a protective layer 16 formed on the metal layer 14. The metal layer 14 is configured to form a predetermined pattern. The base layer 12 has a surface 12a which is covered with the metal layer 14 and a surface 12b which is not covered with the metal layer 14. The protective layer 16 continuously covers the surface 12b of the base layer 12 not covered with the metal layer 14 and a surface of the metal layer 14, and is bonded to the surface 12b of the base layer 12 not covered with the metal layers 14. The base layer 12 and the protective layer 16 contain a resin that includes an imide bond in a repeating unit.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Sumitomo Riko Company Limited
    Inventors: Kazunori TAKAKI, Hirotoshi MATSUDA, Daiki ITO, Yasuhide WATANABE, Isamu MARUYAMA, Shingo NAKAICHI, Yasuyuki HAYASAKI
  • Publication number: 20200241416
    Abstract: Provided is a flexographic printing plate precursor which can suppress chipping of relief images while maintaining printing properties. The flexographic printing plate precursor (10) includes a photosensitive layer (16) which includes (A) a water-dispersed latex, (B) a millable rubber, (C) a surfactant, (D) photopolymerizable compounds, and (E) a photopolymerization initiator, the (D) including the following (d1) to (d3). (d1) is a photopolymerizable compound of a chain structure having no cyclic structure, (d2) is a monofunctional photopolymerizable compound having a cyclic structure, and (d3) is a bifunctional photopolymerizable compound having a cyclic structure.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Applicant: Sumitomo Riko Company Limited
    Inventors: Koji MORIHARA, Hideyuki HASHIMOTO, Daisuke INOUE, Koki MATSUOKA, Yasuyuki HAYASAKI
  • Patent number: 10691038
    Abstract: There is provided a conductive roller for electrophotographic equipment in which a shaft made of core metal has excellent rust resistance. The conductive roller includes a shaft made of core metal, a protective layer formed on the outer periphery of the shaft, and a conductive rubber elastic layer formed on the outer periphery of the protective layer. In a conductive roller for electrophotographic equipment, the conductive rubber elastic layer contains a rubber containing halogen atoms, and the protective layer is formed of a crosslinked material of a composition containing a material obtained by melting and mixing the following components (a) to (c): (a) a polyfunctional maleimide compound having two or more maleimide groups; (b) a benzoxazine compound; and (c) an epoxy resin.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: June 23, 2020
    Assignee: Sumitomo Riko Company Limited
    Inventors: Takahisa Kose, Shigeki Kanda, Yasuyuki Hayasaki, Hiroshi Ukai
  • Publication number: 20200073274
    Abstract: There is provided a conductive roller for electrophotographic equipment in which a shaft made of core metal has excellent rust resistance. The conductive roller includes a shaft made of core metal, a protective layer formed on the outer periphery of the shaft, and a conductive rubber elastic layer formed on the outer periphery of the protective layer. In a conductive roller for electrophotographic equipment, the conductive rubber elastic layer contains a rubber containing halogen atoms, and the protective layer is formed of a crosslinked material of a composition containing a material obtained by melting and mixing the following components (a) to (c): (a) a polyfunctional maleimide compound having two or more maleimide groups; (b) a benzoxazine compound; and (c) an epoxy resin.
    Type: Application
    Filed: November 7, 2019
    Publication date: March 5, 2020
    Applicant: Sumitomo Riko Company Limited
    Inventors: Takahisa KOSE, Shigeki KANDA, Yasuyuki HAYASAKI, Hiroshi UKAI
  • Patent number: 9617361
    Abstract: A modified polymer body 1 has a polymer body 2 composed of a polymer material containing a carbon-carbon double bond and first binding parts 3 and second binding parts 4 bound to the surface of the polymer body 2. The first binding parts 3 are such that an organic group 6 having a functional group is bound via an isocyanuric acid skeleton 5 to the surface of the polymer body 2. The second binding parts 4 are such that an organic group 7 having a functional group is directly bound to the surface of the polymer body 2 without interposing an isocyanuric acid skeleton 5.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 11, 2017
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Yosuke Hayashi, Shuichi Egawa, Yasuyuki Hayasaki
  • Publication number: 20140248067
    Abstract: A modified polymer body 1 has a polymer body 2 composed of a polymer material containing a carbon-carbon double bond and first binding parts 3 and second binding parts 4 bound to the surface of the polymer body 2. The first binding parts 3 are such that an organic group 6 having a functional group is bound via an isocyanuric acid skeleton 5 to the surface of the polymer body 2. The second binding parts 4 are such that an organic group 7 having a functional group is directly bound to the surface of the polymer body 2 without interposing an isocyanuric acid skeleton 5.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Yosuke Hayashi, Shuichi Egawa, Yasuyuki Hayasaki
  • Patent number: 7356294
    Abstract: A developing roll which may reduce stress imparted on toner and have uniform transportability of toner. The developing roll comprises a shaft, an elastic layer provided on an outer peripheral surface of the shaft, and a cylindrical outermost layer provided directly or indirectly via a layer on an outer peripheral surface of the elastic layer, wherein an outer peripheral surface of the outermost layer is formed into a rough surface by distribution of multiple dimples in such a manner that open ends thereof do not overlap one another on the surface and a portion other than the dimples on the rough surface forms a remaining portion of a cylindrical shape.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: April 8, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Masanori Ishida, Kazushi Yamaguchi, Koji Yamaguchi, Yasuyuki Hayasaki
  • Publication number: 20060147229
    Abstract: A developing roll which may reduce stress imparted on toner and have uniform transportability of toner. The developing roll comprises a shaft, an elastic layer provided on an outer peripheral surface of the shaft, and a cylindrical outermost layer provided directly or indirectly via a layer on an outer peripheral surface of the elastic layer, wherein an outer peripheral surface of the outermost layer is formed into a rough surface by distribution of multiple dimples in such a manner that open ends thereof do not overlap one another on the surface and a portion other than the dimples on the rough surface forms a remaining portion of a cylindrical shape.
    Type: Application
    Filed: December 22, 2005
    Publication date: July 6, 2006
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Masanori Ishida, Kazushi Yamaguchi, Koji Yamaguchi, Yasuyuki Hayasaki
  • Patent number: 6918866
    Abstract: An electrically conductive roll includes a shaft body and at least a conductive elastic layer formed by extrusion on an outer circumferential surface of the shaft body. The conductive elastic layer is formed from at least one conductive rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds and a melting point in a range from 40° C. to 100° C., and at least one conductive agent. The thermoplastic resin is included in an amount of 5 to 50 wt. % of a total amount of the rubber material and the thermoplastic resin.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: July 19, 2005
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Shiro Miyamori, Yasuyuki Hayasaki, Masanari Umeda, Kenichi Tsuchiya
  • Publication number: 20050138810
    Abstract: A method of producing an electrically conductive roll having a proper crown shape at lower costs through a smaller number of process steps and without polishing. In this production method, a crown-shaped rubber layer is formed unitarily on a metal core by variably controlling the amount of a rubber material adhering on the metal core along the length of the metal core during extrusion of the rubber material.
    Type: Application
    Filed: February 16, 2005
    Publication date: June 30, 2005
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Shiro Miyamori, Yasuyuki Hayasaki, Masanari Umeda
  • Publication number: 20050085361
    Abstract: A developing roll free from frequent occurrence of an imaging failure such as fog and excellent in durability. The developing roll comprises a shaft (1), a base rubber layer (2) provided on an outer peripheral surface of the shaft (1), and a surface layer (3) provided directly or indirectly via a layer on an outer peripheral surface of the base rubber layer, the surface layer being formed by a material comprising a matrix polymer and adipic acid ester plasticizer.
    Type: Application
    Filed: October 21, 2004
    Publication date: April 21, 2005
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Masanori Ishida, Naoki Yamaguchi, Yasuyuki Hayasaki, Shoji Arimura
  • Publication number: 20040082451
    Abstract: A method of producing an electrically conductive roll having a proper crown shape at lower costs through a smaller number of process steps and without polishing. In this production method, a crown-shaped rubber layer is formed unitarily on a metal core by variably controlling the amount of a rubber material adhering on the metal core along the length of the metal core during extrusion of the rubber material.
    Type: Application
    Filed: October 23, 2003
    Publication date: April 29, 2004
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Shiro Miyamori, Yasuyuki Hayasaki, Masanari Umeda
  • Publication number: 20040062940
    Abstract: An electrically conductive roll which includes a shaft body and which includes at least a conductive elastic layer formed by extrusion on an outer circumferential surface of the shaft body, wherein the conductive elastic layer is formed of at least one conductive rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds and a melting point in a range from 40° C. to 100° C., and at least one conductive agent, the thermoplastic resin being included in an amount of 5 to 50 wt. % of a total amount of the rubber material and the thermoplastic resin.
    Type: Application
    Filed: August 4, 2003
    Publication date: April 1, 2004
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Shiro Miyamori, Yasuyuki Hayasaki, Masanari Umeda, Kenichi Tsuchiya