Patents by Inventor Tetsuichi Ishii

Tetsuichi Ishii 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: 5822653
    Abstract: A toner cartridge includes a toner cartridge body formed with a toner outlet, and a shutter mechanism provided movably closing the toner outlet, the shutter mechanism including a shutter element having a free shutter edge defining a closed space between the shutter element and an outer surface of the toner cartridge body, wherein the shutter element further carries a member for preventing a spillage of toners accumulated in the space from the free shutter edge.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: October 13, 1998
    Assignee: Ricoh Company, Ltd.
    Inventor: Tetsuichi Ishii
  • Patent number: 5671461
    Abstract: A toner cartridge includes a toner cartridge body formed with a toner outlet, and a shatter mechanism provided movably closing the toner outlet, the shatter mechanism including a shatter element having a free shutter edge defining a closed space between the shutter element and an outer surface of the toner cartridge body, wherein the shutter element further carries a member for preventing a spillage of toners accumulated in the space from the free shutter edge.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: September 23, 1997
    Assignee: Ricoh Company, Ltd.
    Inventor: Tetsuichi Ishii