Patents by Inventor Kazuhiko Kanno

Kazuhiko Kanno 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 frame, process cartridge and image forming apparatus
    Patent number: 5815644
    Abstract: A developing frame usable in a process cartridge which is detachably mountable to an image forming apparatus, wherein the process cartridge having an electrophotographic photosensitive member and process means actable on the electrophotographic photosensitive member, includes a first frame having a toner containing portion for containing toner for developing a latent image formed on the photosensitive member, an opening portion formed in the toner containing portion and a toner supply opening for supplying the toner from the toner containing portion to a developing zone; a second frame having a developing device mounting portion for mounting a developing device for developing the latent image on the photosensitive member using the toner contained in the toner containing portion, and a covering member for covering the opening portion of the toner containing portion; wherein the developing frame is constructed by combining the first frame and second frame.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Nishiuwatoko, Kouji Miura, Kazuhiko Kanno
  • Electrode member, developing apparatus, process cartridge and image forming apparatus
    Patent number: 5768658
    Abstract: The present invention provides a process cartridge removably mounted to an electrophotographic image forming apparatus. It comprises an electrophotographic photosensitive member, a developing sleeve for supplying magnetic toner to the electrophotographic photosensitive member to develop a latent image formed on the electrophotographic photosensitive member, a magnet disposed within the developing sleeve, and an electrode member for supplying electricity from the image forming apparatus to the developing sleeve when the process cartridge is mounted to the image forming apparatus. The magnet is positioned in a thrust direction by the electrode member.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: June 16, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazushi Watanabe, Atsushi Numagami, Tsutomu Nishiuwatoko, Koji Miura, Kazuhiko Kanno, Toru Oguma
  • Shutter having first and second shutter members, process cartridge and image forming apparatus having the shutter
    Patent number: 5729796
    Abstract: A shutter for a process cartridge including an electrophotographic photosensitive member, a processing device acting on the photosensitive member, a frame, an exposure opening for permitting exposure of the photosensitive member to image information light, an image transfer opening for permitting transfer of image from the photosensitive member to a recording material, the process cartridge that being detachably mountable to main assembly of an image forming apparatus, one shutter includes an engaging portion for engaging the shutter with the frame; a first shutter member for opening and closing the exposure opening; a second shutter member for opening and closing the transfer opening.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: March 17, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kouji Miura, Tsutomu Nishiuwatoko, Kazuhiko Kanno