Patents by Inventor Yohichi Itoh

Yohichi Itoh 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).

  • Stably operable image-forming apparatus with improved paper conveying and ejecting mechanism
    Patent number: 7682016
    Abstract: An image-forming apparatus includes an endless conveyor belt, a counter roller, and a clutch part. The endless conveyor belt is rotatable to convey paper with a surface of the conveyor belt being charged. The counter roller holds the paper between the conveyor belt and the counter roller and conveys the paper. The clutch part is caused to slip by the difference in velocity between the conveyor belt and the counter roller. The counter roller is driven through the clutch part.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: March 23, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideomi Sakuma, Shinji Imoto, Yohichi Itoh, Hiroshi Yasuda, Akira Ishii
  • Belt conveyance apparatus and image forming apparatus using such a belt conveyance apparatus
    Patent number: 7623816
    Abstract: In an intermediate transfer part (100), a bead 107 is formed on an inner side of an intermediate transfer belt (102), which is rotated by an intermediate transfer belt drive roller (101). Driven roller bearings (104a, 104b) support an intermediate transfer belt driven roller (103). The intermediate transfer belt driven roller (103) is movable in a thrust direction. Ends of the intermediate transfer belt driven roller (101) and the intermediate transfer belt driven roller (103) interfere with a bead (107) so as to restrict a deflection of the intermediate transfer belt in the thrust direction. The intermediate transfer belt driven roller (103) is movable in the thrust direction against a deflection of the intermediate transfer belt (102).
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: November 24, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuneo Maki, Tomiyoshi Misumi, Kiyoshi Tsukamura, Yohichi Itoh, Hideo Aoki
  • Inkjet recording device
    Patent number: 7434927
    Abstract: An inkjet recording device is disclosed that is capable of precisely defining the gap between a conveyance belt and a recording head and maintaining good flatness of the conveyance belt and a recording medium being conveyed. A guide unit is arranged to push a portion of the conveyance belt from the inner side to approach the recording unit. The guide unit has a number of projecting ribs formed on the surface of the guide unit in contact with the conveyance belt and arranged to be perpendicular to the rolling direction of the conveyance belt.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: October 14, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideomi Sakuma, Shinji Imoto, Yohichi Itoh, Hiroshi Yasuda, Akira Ishii
  • Belt conveyance apparatus and image forming apparatus using such a belt conveyance apparatus
    Publication number: 20060233578
    Abstract: In an intermediate transfer part (100), a bead 107 is formed on an inner side of an intermediate transfer belt (102), which is rotated by an intermediate transfer belt drive roller (101). Driven roller bearings (104a, 104b) support an intermediate transfer belt driven roller (103). The intermediate transfer belt driven roller (103) is movable in a thrust direction. Ends of the intermediate transfer belt driven roller (101) and the intermediate transfer belt driven roller (103) interfere with a bead (107) so as to restrict a deflection of the intermediate transfer belt in the thrust direction. The intermediate transfer belt driven roller (103) is movable in the thrust direction against a deflection of the intermediate transfer belt (102).
    Type: Application
    Filed: September 15, 2004
    Publication date: October 19, 2006
    Inventors: Tsuneo Maki, Tomiyoshi Misumi, Kiyoshi Tsukamura, Yohichi Itoh, Hideo Aoki
  • Stably operable image-forming apparatus with improved paper conveying and ejecting mechanism
    Publication number: 20060164491
    Abstract: An image-forming apparatus includes an endless conveyor belt, a counter roller, and a clutch part. The endless conveyor belt is rotatable to convey paper with a surface of the conveyor belt being charged. The counter roller holds the paper between the conveyor belt and the counter roller and conveys the paper. The clutch part is caused to slip by the difference in velocity between the conveyor belt and the counter roller. The counter roller is driven through the clutch part.
    Type: Application
    Filed: November 14, 2003
    Publication date: July 27, 2006
    Inventors: Hideomi Sakuma, Shinji Imoto, Yohichi Itoh, Hiroshi Yasuda, Akira Ishii
  • Inkjet recording device
    Publication number: 20060055754
    Abstract: An inkjet recording device is disclosed that is capable of precisely defining the gap between a conveyance belt and a recording head and maintaining good flatness of the conveyance belt and a recording medium being conveyed. A guide unit is arranged to push a portion of the conveyance belt from the inner side to approach the recording unit. The guide unit has a number of projecting ribs formed on the surface of the guide unit in contact with the conveyance belt and arranged to be perpendicular to the rolling direction of the conveyance belt.
    Type: Application
    Filed: November 25, 2003
    Publication date: March 16, 2006
    Inventors: Hideomi Sakuma, Shinji Imoto, Yohichi Itoh, Hiroshi Yasuda, Akira Ishii