Patents by Inventor Masatomo Tsuduki

Masatomo Tsuduki 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).

  • Developing device, and process cartridge maintaining position of developing roller, and image forming apparatus using these
    Patent number: 7215909
    Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: May 8, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Susumu Nittani, Kanji Yokomori, Masatomo Tsuduki
  • Developing device, developing cartridge, and process cartridge each urging developing roller into regulating portion, and image forming apparatus having such developing device or process cartridge
    Patent number: 7024137
    Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: April 4, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Susumu Nittani, Kanji Yokomori, Masatomo Tsuduki
  • Developing device, developing cartridge, process cartridge, and image forming apparatus using these
    Publication number: 20060013618
    Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.
    Type: Application
    Filed: September 12, 2005
    Publication date: January 19, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Susumu Nittani, Kanji Yokomori, Masatomo Tsuduki
  • Developing device, developing cartridge, process cartridge, and image forming apparatus using these
    Publication number: 20030228173
    Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when driving force is transmitted to the developing roller to thereby make the position of the developing roller in the thrust direction constant.
    Type: Application
    Filed: April 1, 2003
    Publication date: December 11, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Susumu Nittani, Kanji Yokomori, Masatomo Tsuduki