Patents by Inventor Hiroshi Yadoiwa

Hiroshi Yadoiwa 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).

  • Power supply and image forming apparatus
    Patent number: 10175632
    Abstract: A power supply includes a first switching unit, a power restriction unit connected between the first switching unit and a load, a second switching unit connected between the power restriction unit and the load, a controller configured to output a control signal to the first switching unit and the second switching unit, and an adjusting unit configured to adjust input of the control signal to the second switching unit, and the second switching unit is operated selectively in accordance with the control signal.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: January 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Matsumura, Hiroshi Yadoiwa
  • POWER SUPPLY AND IMAGE FORMING APPARATUS
    Publication number: 20180164735
    Abstract: A power supply includes a first switching unit, a power restriction unit connected between the first switching unit and a load, a second switching unit connected between the power restriction unit and the load, a controller configured to output a control signal to the first switching unit and the second switching unit, and an adjusting unit configured to adjust input of the control signal to the second switching unit, and the second switching unit is operated selectively in accordance with the control signal.
    Type: Application
    Filed: February 8, 2018
    Publication date: June 14, 2018
    Inventors: Ryo Matsumura, Hiroshi Yadoiwa
  • Fixing apparatus for fixing a toner image on a recording material at a nip portion
    Patent number: 9989903
    Abstract: Provided is a fixing apparatus for fixing a toner image on a recording material while conveying the recording material on which the toner image has been formed at a nip portion that includes a roller, a heating unit configured to heat the roller from outside the roller, the heating unit receiving power supplied from a power supply, a backup unit forming the nip portion with the roller, and a power shutdown member configured to operate in response to an abnormal temperature of the backup unit and shut down power supply to the heating unit.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: June 5, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Isamu Takeda, Kazuhiro Doda, Keisuke Samejima, Hiroshi Yadoiwa
  • Power supply and image forming apparatus
    Patent number: 9933744
    Abstract: A power supply includes a first switching unit, a power restriction unit connected between the first switching unit and a load, a second switching unit connected between the power restriction unit and the load, a controller configured to output a control signal to the first switching unit and the second switching unit, and an adjusting unit configured to adjust input of the control signal to the second switching unit, and the second switching unit is operated selectively in accordance with the control signal.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: April 3, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Matsumura, Hiroshi Yadoiwa
  • FIXING APPARATUS
    Publication number: 20170343931
    Abstract: Provided is a fixing apparatus for fixing a toner image on a recording material while conveying the recording material on which the toner image has been formed at a nip portion that includes a roller, a heating unit configured to heat the roller from outside the roller, the heating unit receiving power supplied from a power supply, a backup unit forming the nip portion with the roller, and a power shutdown member configured to operate in response to an abnormal temperature of the backup unit and shut down power supply to the heating unit.
    Type: Application
    Filed: June 19, 2017
    Publication date: November 30, 2017
    Inventors: Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Isamu Takeda, Kazuhiro Doda, Keisuke Samejima, Hiroshi Yadoiwa
  • Fixing apparatus
    Patent number: 9709935
    Abstract: Provided is a fixing apparatus for fixing a toner image on a recording material while conveying the recording material on which the toner image has been formed at a nip portion that includes a roller, a heating unit configured to heat the roller from outside the roller, the heating unit receiving power supplied from a power supply, a backup unit forming the nip portion with the roller, and a power shutdown member configured to operate in response to an abnormal temperature of the backup unit and shut down power supply to the heating unit.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: July 18, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Isamu Takeda, Kazuhiro Doda, Keisuke Samejima, Hiroshi Yadoiwa
  • FIXING APPARATUS
    Publication number: 20160349680
    Abstract: Provided is a fixing apparatus for fixing a toner image on a recording material while conveying the recording material on which the toner image has been formed at a nip portion that includes a roller, a heating unit configured to heat the roller from outside the roller, the heating unit receiving power supplied from a power supply, a backup unit forming the nip portion with the roller, and a power shutdown member configured to operate in response to an abnormal temperature of the backup unit and shut down power supply to the heating unit.
    Type: Application
    Filed: May 25, 2016
    Publication date: December 1, 2016
    Inventors: Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Isamu Takeda, Kazuhiro Doda, Keisuke Samejima, Hiroshi Yadoiwa
  • POWER SUPPLY AND IMAGE FORMING APPARATUS
    Publication number: 20160349691
    Abstract: A power supply includes a first switching unit, a power restriction unit connected between the first switching unit and a load, a second switching unit connected between the power restriction unit and the load, a controller configured to output a control signal to the first switching unit and the second switching unit, and an adjusting unit configured to adjust input of the control signal to the second switching unit, and the second switching unit is operated selectively in accordance with the control signal.
    Type: Application
    Filed: May 17, 2016
    Publication date: December 1, 2016
    Inventors: Ryo Matsumura, Hiroshi Yadoiwa