Patents by Inventor Tetsunao Koujiri

Tetsunao Koujiri 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: 8787788
    Abstract: An image forming apparatus includes an image holding body that holds an electrostatic latent image; a developing device that develops the electrostatic latent image with a toner and forms a toner image on the image holding body; a transfer member having a fluorocarbon resin dispersion layer at least at a surface layer of the transfer member, fluorocarbon resin being dispersed in the fluorocarbon resin dispersion layer; a first transfer device that first-transfers the toner image, which is formed on the image holding body, on the transfer member; a second transfer device that second-transfers the toner image, which is first-transferred on the transfer member, on a recording medium; and an abrading member that is arranged to come into contact with and be separated from the transfer member and abrades part of the surface layer of the transfer member when the abrading member contacts the transfer member.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: July 22, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tetsunao Koujiri, Taku Fukuhara, Yoko Miyamoto
  • Patent number: 8361686
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on an electroconductive substrate, a surface layer of the electrophotographic photoreceptor including a fluorinated alkyl group-containing copolymer having repeating units represented by the following formulae A and B, and fluorine-based resin particles: wherein in Formulae A and B, l, m and n each independently represent a integer number of 1 or more; p, q, r and s each independently represent 0 or an integer of 1 or more; t represents an integer of from 1 to 7; R1, R2, R3, and R4 each independently represent a hydrogen atom or an alkyl group; X represents an alkylene chain, a halogen-substituted alkylene chain, —S—, —O—, —NH— or a single bond; Y represents an alkylene chain, a halogen-substituted alkylene chain, —(CzH2z-1(OH))— or a single bond; and z represents an integer of 1 or more.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: January 29, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hidemi Nukada, Shinya Yamamoto, Masaru Miura, Hitoshi Takimoto, Takahiro Suzuki, Tetsunao Koujiri
  • Publication number: 20120195624
    Abstract: An image forming apparatus includes an image holding body that holds an electrostatic latent image; a developing device that develops the electrostatic latent image with a toner and forms a toner image on the image holding body; a transfer member having a fluorocarbon resin dispersion layer at least at a surface layer of the transfer member, fluorocarbon resin being dispersed in the fluorocarbon resin dispersion layer; a first transfer device that first-transfers the toner image, which is formed on the image holding body, on the transfer member; a second transfer device that second-transfers the toner image, which is first-transferred on the transfer member, on a recording medium; and an abrading member that is arranged to come into contact with and be separated from the transfer member and abrades part of the surface layer of the transfer member when the abrading member contacts the transfer member.
    Type: Application
    Filed: August 9, 2011
    Publication date: August 2, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tetsunao Koujiri, Taku Fukuhara, Yoko Miyamoto
  • Publication number: 20090226208
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on an electroconductive substrate, a surface layer of the electrophotographic photoreceptor including a fluorinated alkyl group-containing copolymer having repeating units represented by the following formulae A and B, and fluorine-based resin particles: wherein in Formulae A and B, l, m and n each independently represent a integer number of 1 or more; p, q, r and s each independently represent 0 or an integer of 1 or more; t represents an integer of from 1 to 7; R1, R2, R3, and R4 each independently represent a hydrogen atom or an alkyl group; X represents an alkylene chain, a halogen-substituted alkylene chain, —S—, —O—, —NH— or a single bond; Y represents an alkylene chain, a halogen-substituted alkylene chain, —(CzH2z-1(OH))— or a single bond; and z represents an integer of 1 or more.
    Type: Application
    Filed: October 7, 2008
    Publication date: September 10, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hidemi NUKADA, Shinya YAMAMOTO, Masaru MIURA, Hitoshi TAKIMOTO, Takahiro SUZUKI, Tetsunao KOUJIRI