Patents by Inventor Tamoe Sasaki

Tamoe Sasaki 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).

  • Electrophotographic toner, toner container containing the toner, image forming apparatus using the toner container and method for supplying the toner from the toner container
    Patent number: 6356729
    Abstract: A toner with a volume average particle diameter not less than 6.0 &mgr;m and a particle distribution such that toner particles having a particle diameter not greater than one half of the number average particle diameter of the toner are present in an amount not greater than 10% by number, and toner particles having a particle diameter not less than 1.5 times the volume average particle diameter of the toner are present in an amount not greater than 15% by volume. The toner is preferably contained in a cylindrical toner container having at least an opening, and a spiral groove formed on the internal surface thereof. The toner container is horizontally set in an image forming apparatus for rotation around the center axis thereof to discharge the toner to a developing device of the image forming apparatus through the opening.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: March 12, 2002
    Assignee: Ricoh Company, Ltd.
    Inventors: Tamoe Sasaki, Satoshi Mochizuki