Patents by Inventor Isamu Sakata

Isamu Sakata 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).

  • Patent number: 10732543
    Abstract: Providing a toner cartridge capable of restraining toner from leaking through an opening, and improving labor efficiency for assembling the cartridge. The toner cartridge (process cartridge 1) includes a developing frame having a storage chamber configured to store therein toner and formed with an opening to discharge the toner out of the storage chamber, a shaft rotatably supported to the developing frame; and an agitation sheet positioned in the storage chamber and having a base end portion supported to the shaft, the agitation sheet being rotationally movable along with rotation of the shaft. The developing frame includes a first wall formed with the opening, and a second wall configured to support the agitation sheet by nipping the agitation sheet positioned to close the opening between the first wall and the second wall, the second wall permitting the agitation sheet to contact with the first wall and contacting with the agitation sheet through an elastic member.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: August 4, 2020
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Isamu Sakata
  • Publication number: 20190391510
    Abstract: Providing a toner cartridge capable of restraining toner from leaking through an opening, and improving labor efficiency for assembling the cartridge. The toner cartridge (process cartridge 1) includes a developing frame having a storage chamber configured to store therein toner and formed with an opening to discharge the toner out of the storage chamber, a shaft rotatably supported to the developing frame; and an agitation sheet positioned in the storage chamber and having a base end portion supported to the shaft, the agitation sheet being rotationally movable along with rotation of the shaft. The developing frame includes a first wall formed with the opening, and a second wall configured to support the agitation sheet by nipping the agitation sheet positioned to close the opening between the first wall and the second wall, the second wall permitting the agitation sheet to contact with the first wall and contacting with the agitation sheet through an elastic member.
    Type: Application
    Filed: July 13, 2017
    Publication date: December 26, 2019
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Isamu SAKATA
  • Patent number: 9915917
    Abstract: A process cartridge has a drum unit having a photosensitive drum; a developing unit having a developing roller and movable relative to the drum unit; a first electrically conductive member provided at the drum unit and configured to contact a terminal of an image forming apparatus; a second electrically conductive member provided at the developing unit; and a third electrically conductive member electrically connected to the first electrically conductive member and to the second electrically conductive member, the third electrically conductive member being deformable in accordance with the movement of the developing unit.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 13, 2018
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Isamu Sakata, Shota Shinoya
  • Patent number: 9785092
    Abstract: A developing cartridge includes a developing roller, a shaft, a gear, an electric contact, and a gear cover. The developing roller is rotatable about a first axis extending in a predetermined direction and includes a developing roller shaft extending along the first axis. The shaft extends in the predetermined direction and has a peripheral surface. The gear is rotatable about the shaft. The electric contact is positioned at the peripheral surface of the shaft. The gear cover covers at least a portion of the gear and electrically connects the electric contact and the developing roller shaft.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 10, 2017
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Isamu Sakata
  • Publication number: 20170285570
    Abstract: A process cartridge has a drum unit having a photosensitive drum; a developing unit having a developing roller and movable relative to the drum unit; a first electrically conductive member provided at the drum unit and configured to contact a terminal of an image forming apparatus; a second electrically conductive member provided at the developing unit; and a third electrically conductive member electrically connected to the first electrically conductive member and to the second electrically conductive member, the third electrically conductive member being deformable in accordance with the movement of the developing unit.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 5, 2017
    Inventors: Isamu Sakata, Shota Shinoya
  • Publication number: 20170269507
    Abstract: A developing cartridge includes a developing roller, a shaft, a gear, an electric contact, and a gear cover. The developing roller is rotatable about a first axis extending in a predetermined direction and includes a developing roller shaft extending along the first axis. The shaft extends in the predetermined direction and has a peripheral surface. The gear is rotatable about the shaft. The electric contact is positioned at the peripheral surface of the shaft. The gear cover covers at least a portion of the gear and electrically connects the electric contact and the developing roller shaft.
    Type: Application
    Filed: September 26, 2016
    Publication date: September 21, 2017
    Inventor: Isamu Sakata