Patents by Inventor Noriaki Kawada

Noriaki Kawada 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: 5900295
    Abstract: A fixing roller for an electrophotographic device has a cylindrical-shaped metallic base body, an insulation layer formed on an outer peripheral surface of the cylindrical-shaped metallic base body, and a resistance resin layer laminated on the insulation layer. The resistance resin layer is prepared using an injection-molding technique in which a die having a side gate structure is used as a resin-molding die. A major constituent of the resistance resin layer is selected from a polyphenylene sulfide resin, a polyphthalamide resin, and a liquid crystal polymer resin. In addition, the resistance resin layer also contains a mixture of carbon black and carbon fiber. Thus, the resistance resin layer has a specific volume resistance of 2 .OMEGA.cm or less in a direction along a central line of the cylindrical-shaped metallic base body. Both ends of the resistance resin layer are concentrically connected to ring-shaped metallic electrodes.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: May 4, 1999
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Noriaki Kawada