Patents by Inventor Tsuyoshi Doubata

Tsuyoshi Doubata 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).

  • Image forming apparatus using an endless belt
    Patent number: 6141522
    Abstract: In an image forming apparatus, such as an electrophotography-basis copying machine or laser printer, ribs are provided on and along both side ends of the inner surface of an intermediate transfer belt. Rib guides are provided on both ends of a drive roll. The ribs are brought into contact with the rib guides, whereby the intermediate transfer belt is guided. The diameter of each rib guide is slightly larger than the diameter of the drive roll, to thereby form a gap between the drive roll and the intermediate transfer belt. In a region including the gap and its vicinity, a friction created between the drive roll and the intermediate transfer belt is reduced. Therefore, thrust of each rib against each rib guide, caused by the walk, is reduced.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: October 31, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Ryouichi Tsuruoka, Norio Ogawahara, Iwao Kuriki, Takeshi Fukuda, Tsuyoshi Doubata, Kouji Hamabe