Patents by Inventor Akihiko Matuyama

Akihiko Matuyama 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).

  • Method of coating a cylindrical photoconductive element for an electrophotographic image forming apparatus and apparatus for the same
    Patent number: 7288349
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: October 30, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Method of coating a cylindrical photoconductive element for an electrophotographic image forming apparatus and apparatus for the same
    Publication number: 20060127795
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Application
    Filed: January 23, 2006
    Publication date: June 15, 2006
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Method for coating a cylindrical photoconductive element for an electrophotographic image forming apparatus and apparatus for the same
    Patent number: 6852166
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: February 8, 2005
    Assignee: Ricoh Company, Ltd.
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Electrophotographic photoconductor, method of manufacturing same and image forming method, image forming apparatus and process cartridge using same
    Patent number: 6653033
    Abstract: An electrophotographic photoconductor having an electroconductive support, and a photoconductive layer formed on the support and having an outwardly facing surface. The photoconductive layer includes a charge transporting material, a charge generating material and an inorganic filler including &agr;-alumina, wherein the concentration of the inorganic filler in the photoconductive layer decreases stepwise or continuously in the direction from the outwardly facing surface thereof to the opposite surface thereof.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: November 25, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matuyama, Nozomu Tamoto, Eiji Kurimoto
  • Electrophotographic photoconductor, method of manufacturing same and image forming method, image forming apparatus and process cartridge using same
    Patent number: 6573016
    Abstract: An electrophotographic photoconductor having an electroconductive support, and a photoconductive layer formed on the support and having an outwardly facing surface. The photoconductive layer includes a charge transporting material, a charge generating material and an inorganic filler including &agr;-alumina, wherein the concentration of the inorganic filler in the photoconductive layer decreases stepwise or continuously in the direction from the outwardly facing surface thereof to the opposite surface thereof.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: June 3, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matuyama, Nozomu Tamoto, Eiji Kurimoto
  • Method for coating a cylindrical photoconductive element for an electrophotographic image forming apparatus and apparatus for the same
    Publication number: 20020150832
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Application
    Filed: March 1, 2002
    Publication date: October 17, 2002
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Electrophotographic photoconductor, method of manufacturing same and image forming method, image forming apparatus and process cartridge using same
    Publication number: 20020106570
    Abstract: An electrophotographic photoconductor having an electroconductive support, and a photoconductive layer formed on the support and having an outwardly facing surface. The photoconductive layer includes a charge transporting material, a charge generating material and an inorganic filler including &agr;-alumina, wherein the concentration of the inorganic filler in the photoconductive layer decreases stepwise or continuously in the direction from the outwardly facing surface thereof to the opposite surface thereof.
    Type: Application
    Filed: November 2, 2001
    Publication date: August 8, 2002
    Inventors: Hidetoshi Kami, Tatsuya Niimi, Akihiko Matuyama, Nozomu Tamoto, Eiji Kurimoto