Patents by Inventor Takahiko Hattori

Takahiko Hattori 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).

  • Charging member, charging unit, process cartridge, image forming apparatus, and method of manufacturing charging member
    Patent number: 9095999
    Abstract: A charging member includes a conductive support, and a conductive elastic layer that is provided on an outer peripheral surface of the conductive support and includes a rubber material and inorganic particles, and in which an average dispersion degree of aggregates of the inorganic particles is 95% or greater and a maximum particle diameter of the aggregates of the inorganic particles is 200 ?m or less.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: August 4, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shogo Tomari, Hiroyuki Miura, Takahiko Hattori
  • Charging roll, charging unit, process cartridge, image forming apparatus, and method of manufacturing charging roll
    Patent number: 9046803
    Abstract: A charging roll includes a cylindrical base member that has a metal-containing surface, a conductive adhesive layer that includes a halogen atom-containing resin and has surface roughness Rz in a range of 0.5 ?m to 8 ?m on an outer peripheral surface side on the base member, and a conductive elastic layer that is disposed to be brought into contact with the outer peripheral surface of the conductive adhesive layer and includes a halogen atom-containing rubber.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: June 2, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takuro Hoshio, Taketoshi Hoshizaki, Shoichi Masuda, Eiichi Iida, Takahiko Hattori, Noboru Wada
  • CHARGING ROLL, CHARGING UNIT, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING CHARGING ROLL
    Publication number: 20150050052
    Abstract: A charging roll includes a cylindrical base member that has a metal-containing surface, a conductive adhesive layer that includes a halogen atom-containing resin and has surface roughness Rz in a range of 0.5 ?m to 8 ?m on an outer peripheral surface side on the base member, and a conductive elastic layer that is disposed to be brought into contact with the outer peripheral surface of the conductive adhesive layer and includes a halogen atom-containing rubber.
    Type: Application
    Filed: February 18, 2014
    Publication date: February 19, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takuro HOSHIO, Taketoshi HOSHIZAKI, Shoichi MASUDA, Eiichi IIDA, Takahiko HATTORI, Noboru WADA
  • CHARGING MEMBER, CHARGING UNIT, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING CHARGING MEMBER
    Publication number: 20150016844
    Abstract: A charging member includes a conductive support, and a conductive elastic layer that is provided on an outer peripheral surface of the conductive support and includes a rubber material and inorganic particles, and in which an average dispersion degree of aggregates of the inorganic particles is 95% or greater and a maximum particle diameter of the aggregates of the inorganic particles is 200 ?m or less.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 15, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shogo TOMARI, Hiroyuki MIURA, Takahiko HATTORI
  • Electro-conductive roll and image-forming apparatus using the same
    Patent number: 7072604
    Abstract: An electro-conductive roll is provided that makes contact with a body to be charged in a state in which a voltage is applied thereto, and charges the body to be charged, a surface of the electro-conductive roll satisfying the following conditions (a) and (b): (a) the surface of the electro-conductive roll has a 10-point average roughness of 5 ?m or less; and (b) the surface of the electro-conductive roll has a dynamic ultra-microhardness in the range of 0.04 to 0.5.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: July 4, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroyuki Miura, Hiroshi Takayama, Minoru Rokutan, Ryusei Kouda, Takahiko Hattori, Ryuji Watanabe
  • Electro-conductive roll and image-forming apparatus using the same
    Publication number: 20040247340
    Abstract: An electro-conductive roll is provided that makes contact with a body to be charged in a state in which a voltage is applied thereto, and charges the body to be charged, a surface of the electro-conductive roll satisfying the following conditions (a) and (b):
    Type: Application
    Filed: March 19, 2004
    Publication date: December 9, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hiroyuki Miura, Hiroshi Takayama, Minoru Rokutan, Ryusei Kouda, Takahiko Hattori, Ryuji Watanabe
  • Segmented transversal filter
    Patent number: 4649507
    Abstract: A segmented digital transversal filter comprising a first transversal filter 4 that eliminates all frequency components from a signal sequence above half the subsampling frequency, a second transversal filter 11 that convolutes the output of the first filter with a decimated and energy compensated lower band of filter coefficients (HI.sub.1 '), a third transversal filter 22 that convolutes the output of the first filter and a decimated and energy-compensated upper band of filter coefficients (HI.sub.2 '), and a fourth transversal filter 32 that convolutes the original signal sequence and the central band of filter coefficients (HI.sub.3). Delays 21 and 31 are added so that the outputs of the second, third and fourth filters arrive concurrently at an adder 51, the sum being the output of the invention.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: March 10, 1987
    Assignees: NEC Corporation, New Nippon Electric Co., Ltd.
    Inventors: Masao Inaba, Hiroshi Takahashi, Kazuhiko Nosaka, Takahiko Hattori