Patents by Inventor Ikunobu Yoshiyama

Ikunobu Yoshiyama 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).

  • Charger, image forming apparatus and process cartridge
    Patent number: 7356286
    Abstract: A charger is opposed to a charging subject member and charges the charging subject member by generating corona discharge. The charger includes: a discharge electrode; and a pair of facing electrodes that are disposed to face with each other being the discharge electrode interposed therebetween and arranged to be distant from the discharge electrode, wherein the facing electrodes are arranged that an interval between the facing electrodes gradually decreases towards the charging subject member.
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: April 8, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Nao Itabashi, Takahiro Nishimoto, Kunihiko Kondo, Fumikazu Sato, Ikunobu Yoshiyama, Tsutomu Suzuki
  • Grid, scorotron charger having the grid, process unit having the scorotron charger, and image forming device installing the process unit
    Patent number: 7187889
    Abstract: A grid has a frame body in a U-shaped cross-section defining a main plate section and two side plate sections. A rectangular opening is formed at the main plate section, and a plurality of grid wires extend in a lengthwise direction of the main plate section and at one side thereof. Each end portion of each grid wire is soldered to each lengthwise end portion of the main plate section under tension. For providing a scorotron charger, a discharge wire is positioned opposite to the grid wires with respect to the main plate section, and each end of the discharge wire is fixed to the frame body in such a manner that the discharge wire extends in parallel with the grid wires.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: March 6, 2007
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Ikunobu Yoshiyama
  • Grid, scorotoron charger having the grid, process unit having the scorotoron charger, and image forming device installing the process unit
    Publication number: 20060153594
    Abstract: A grid has a frame body in a U-shaped cross-section defining a main plate section and two side plate sections. A rectangular opening is formed at the main plate section, and a plurality of grid wires extend in a lengthwise direction of the main plate section and at one side thereof. Each end portion of each grid wire is soldered to each lengthwise end portion of the main plate section under tension. For providing a scorotoron charger, a discharge wire is positioned opposite to the grid wires with respect to the main plate section, and each end of the discharge wire is fixed to the frame body in such a manner that the discharge wire extends in parallel with the grid wires.
    Type: Application
    Filed: March 9, 2006
    Publication date: July 13, 2006
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Ikunobu Yoshiyama
  • Grid, scorotoron charger having the grid, process unit having the scorotoron charge, and image forming device installing the process unit
    Patent number: 7035571
    Abstract: A grid has a frame body in a U-shaped cross-section defining a main plate section and two side plate sections. A rectangular opening is formed at the main plate section, and a plurality of grid wires extend in a lengthwise direction of the main plate section and at one side thereof. Each end portion of each grid wire is soldered to each lengthwise end portion of the main plate section under tension. For providing a scorotoron charger, a discharge wire is positioned opposite to the grid wires with respect to the main plate section, and each end of the discharge wire is fixed to the frame body in such a manner that the discharge wire extends in parallel with the grid wires.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: April 25, 2006
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Ikunobu Yoshiyama
  • Charger, image forming apparatus and process cartridge
    Publication number: 20060034635
    Abstract: A charger is opposed to a charging subject member and charges the charging subject member by generating corona discharge. The charger includes: a discharge electrode; and a pair of facing electrodes that are disposed to face with each other being the discharge electrode interposed therebetween and arranged to be distant from the discharge electrode, wherein the facing electrodes are arranged that an interval between the facing electrodes gradually decreases towards the charging subject member.
    Type: Application
    Filed: August 10, 2005
    Publication date: February 16, 2006
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Nao Itabashi, Takahiro Nishimoto, Kunihiko Kondo, Fumikazu Sato, Ikunobu Yoshiyama, Tsutomu Suzuki
  • Grid, scorotoron charger having the grid, process unit having the scorotoron charge, and image forming device installing the process unit
    Publication number: 20030039485
    Abstract: A grid has a frame body in a U-shaped cross-section defining a main plate section and two side plate sections. A rectangular opening is formed at the main plate section, and a plurality of grid wires extend in a lengthwise direction of the main plate section and at one side thereof. Each end portion of each grid wire is soldered to each lengthwise end portion of the main plate section under tension. For providing a scorotoron charger, a discharge wire is positioned opposite to the grid wires with respect to the main plate section, and each end of the discharge wire is fixed to the frame body in such a manner that the discharge wire extends in parallel with the grid wires.
    Type: Application
    Filed: August 22, 2002
    Publication date: February 27, 2003
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Ikunobu Yoshiyama
  • Image forming apparatus
    Patent number: 5822657
    Abstract: An image forming apparatus is provided that includes a photosensitive drum; a laser scanner unit; a developing roller; a transfer roller; and a cleaning device. The cleaning device absorbs residual toner left on the surface of the photosensitive drum after a transfer process from the surface of the photosensitive drum by using a potential difference from the photosensitive drum in an absorption mode and for blowing off and dispersing the absorbed toner to the surface of the photosensitive drum by using another potential difference from the photosensitive drum in a blowing-off mode.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: October 13, 1998
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Hidenori Hisada, Ikunobu Yoshiyama