Patents by Inventor Kouhei Mishima

Kouhei Mishima 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
    Patent number: 10739701
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier, and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction. The feeding screw includes a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade. The plate-like projection portion is provided to contact an adjacent helical blade on a downstream side with respect to the feeding direction without contacting an adjacent helical blade on an upstream side with respect to the feeding direction.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: August 11, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouhei Mishima, Dai Kanai
  • Developing device
    Patent number: 10670991
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction. The feeding screw includes a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: June 2, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouhei Mishima, Dai Kanai
  • DEVELOPING DEVICE
    Publication number: 20190227460
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier; and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction, the feeding screw including a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade. The plate-like projection portion is provided so as to contact an adjacent helical blade on a downstream side with respect to the feeding direction without contacting an adjacent helical blade on an upstream side with respect to the feeding direction.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Inventors: Kouhei Mishima, Dai Kanai
  • DEVELOPING DEVICE
    Publication number: 20190227461
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier; and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction, the feeding screw including a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Inventors: Kouhei Mishima, Dai Kanai