Patents by Inventor Yasuki Ohtake

Yasuki Ohtake 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).

  • Semi-conductive roll
    Patent number: 7288058
    Abstract: A semi-conductive roll is provided including a shaft, a low-hardness base layer formed on an outer circumferential surface of the shaft, and a coating layer formed by coating the low-hardness base layer radially outwardly. The coating layer includes one of a rubber material and an elastomer material that is crosslinked by at least one resin crosslinking agent.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: October 30, 2007
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Akihiko Kaji, Motoharu Ishihara, Hirofumi Okuda, Yasuki Ohtake
  • Developing roll
    Publication number: 20040190949
    Abstract: A developing roll, which can reduce residual charge even under environment of low temperature and low humidity, comprises a shaft 1, an innermost layer 2, an intermediate layer 3 and an outermost layer 4 provided in this order on an outer peripheral surface of the shaft, the intermediate layer including an ionic conductive agent and carbon black and having a volume resistivity (&rgr;v) of not more than 1.0×106&OHgr;·cm and the outermost layer having a volume resistivity (&rgr;v) of 1.0×107 to 1.0×1013 &OHgr;·cm.
    Type: Application
    Filed: March 30, 2004
    Publication date: September 30, 2004
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Kazushi Yamaguchi, Mitsuyoshi Kondo, Akihiko Kaji, Yasuki Ohtake
  • Semi-conductive roll
    Publication number: 20040152575
    Abstract: A semi-conductive roll including a shaft, a low-hardness base layer formed on an outer circumferential surface of the shaft, and a coating layer formed by coating radially outwardly of the low-hardness base layer, wherein the coating layer is formed such that a rubber material or an elastomer material is crosslinked by at least one resin crosslinking agent.
    Type: Application
    Filed: December 29, 2003
    Publication date: August 5, 2004
    Applicant: Tokai Rubber Industries, Ltd.
    Inventors: Akihiko Kaji, Motoharu Ishihara, Hirofumi Okuda, Yasuki Ohtake