Patents by Inventor Masakazu Nakada

Masakazu Nakada 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).

  • Recyclable toner container for an image forming apparatus
    Patent number: 5983059
    Abstract: A recyclable toner container having a hollow cylindrical body, a toner outlet at one end of the container, and a removable cap fitted in the toner outlet. The cap have a plurality of circumferential protuberances on an outer periphery thereof and contacting the inner periphery of the toner outlet. The diameters of the plurality of protuberances are sequentially increased from a downstream side toward an upstream side in a direction in which the cap is inserted into the toner outlet.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: November 9, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Seiji Oka, Yasushi Akiba, Masumi Ikesue, Masakazu Nakada, Hiroyasu Itou
  • Densely packed toner container and method of producing the same
    Patent number: 5740507
    Abstract: A toner container densely packed with toner to be replenished into a developing unit included in an image forming apparatus, and a method of producing the same. The toner is packed in the container with a ratio of a packing density to a saturation bulk density greater than 1.0, a mean penetration greater than 5.0 mm inclusive, and a standard deviation of penetration not exceeding one-fifth of the mean penetration. The toner can be smoothly and continuously replenished into the developing unit so as to form a number of images matching the amount thereof.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: April 14, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Sunao Ikeda, Nobuhiro Makita, Michiharu Narushima, Seiji Terazawa, Masakazu Nakada, Kazuhiko Umemura