Patents by Inventor Goichi Kitadai

Goichi Kitadai 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 forming apparatus
    Patent number: 9244401
    Abstract: In an image forming apparatus, the overall length of a heat generating resistor is set longer than the width of a recording paper, which is the greatest of widths of standard size recording papers that can be used on the image forming apparatus. An electrical resistance of an edge area of the heat generating resistor per unit length is set smaller than that of a center area of the heat generating resistor. The position of a boundary between the center area and the edge area is set so that the position of the side edge of the recording paper whose width is the greatest exists within the edge area and so that if the recording paper having the second greatest width is fed by a one edge-aligned paper feeding method, the position of the side edge of a recording paper whose width is the greatest of the widths of the standard size recording papers that can be used on the image forming apparatus except the width of the recording paper that is the greatest thereof is set at a position within the center area.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: January 26, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Goichi Kitadai, Daisuke Miyagawa, Noriyuki Ito, Takahiro Uchiyama
  • Image heating apparatus having stably positioned heating unit
    Patent number: 8515326
    Abstract: The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: August 20, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisashi Nakahara, Goichi Kitadai, Yoshihiro Matsuo, Yoji Tomoyuki, Takahiro Uchiyama, Koji Uchiyama
  • IMAGE HEATING APPARATUS
    Publication number: 20120183336
    Abstract: The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hisashi Nakahara, Goichi Kitadai, Yoshihiro Matsuo, Yoji Tomoyuki, Takahiro Uchiyama, Koji Uchiyama
  • Image heating apparatus having stably positioned heating unit
    Patent number: 8170458
    Abstract: The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: May 1, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisashi Nakahara, Goichi Kitadai, Yoshihiro Matsuo, Yoji Tomoyuki, Takahiro Uchiyama, Koji Uchiyama
  • IMAGE FORMING APPARATUS
    Publication number: 20100104340
    Abstract: In an image forming apparatus, the overall length of a heat generating resistor is set longer than the width of a recording paper, which is the greatest of widths of standard size recording papers that can be used on the image forming apparatus. An electrical resistance of an edge area of the heat generating resistor per unit length is set smaller than that of a center area of the heat generating resistor. The position of a boundary between the center area and the edge area is set so that the position of the side edge of the recording paper whose width is the greatest exists within the edge area and so that if the recording paper having the second greatest width is fed by a one edge-aligned paper feeding method, the position of the side edge of a recording paper whose width is the greatest of the widths of the standard size recording papers that can be used on the image forming apparatus except the width of the recording paper that is the greatest thereof is set at a position within the center area.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Goichi Kitadai, Daisuke Miyagawa, Noriyuki Ito, Takahiro Uchiyama
  • IMAGE HEATING APPARATUS
    Publication number: 20100028062
    Abstract: The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 4, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hisashi Nakahara, Goichi Kitadai, Yoshihiro Matsuo, Yoji Tomoyuki, Takahiro Uchiyama, Koji Uchiyama