Patents by Inventor Yuzou Kouno

Yuzou Kouno 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).

  • Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside
    Patent number: 5915147
    Abstract: The present invention is intended to solve a problem in that the response in the temperature detection in the rotor having the induction coil inside the durability in the rotor and a stain temperature detection means in the rotor is affected by the magnetic flux of an induction heating mechanism.The invention provides an image fixing device having an induction coil inside of a rotor 11 which is rotatably supported, the device having inside of the rotor 11 at least one oftemperature detection means 17 for detecting the temperature of the rotor 11 ortemperature over-rise preventing detection means 18 for detecting that the temperature of the rotor 11 has risen to a predetermined temperature.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: June 22, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuzou Kouno, Toshiaki Higaya, Hiroshi Yokoyama, Jyunji Nakai, Keizou Yasuda, Masahiko Sato, Masanao Ehara, Takayuki Seki
  • Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside
    Patent number: 5832354
    Abstract: The present invention is intended to solve a problem in that the response in the temperature detection in the rotor having the induction coil inside the durability in the rotor and a stain temperature detection means in the rotor is affected by the magnetic flux of an induction heating mechanism.The invention provides an image fixing device having an induction coil inside of a rotor 11 which is rotatably supported, the device having inside of the rotor 11 at least one of temperature detection means 17 for detecting the temperature of the rotor 11 or temperature over-rise preventing detection means 18 for detecting that the temperature of the rotor 11 has risen to a predetermined temperature.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: November 3, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuzou Kouno, Toshiaki Higaya, Hiroshi Yokoyama, Jyunji Nakai, Keizou Yasuda, Masahiko Sato, Masanao Ehara, Takayuki Seki