Patents by Inventor Keiji Ban

Keiji Ban 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: 5749035
    Abstract: A conveying guide for conveying a sheet onto which an image has been transferred is made of a synthetic resin having a resistance higher than the resistance of the transfer sheet. The upstream side end of the upper surface of the conveying guide is located sufficiently lower than the position at which the sheet is separated from the surface of the photoreceptor drum. With these arrangements, the charging of the conveying guide due to the friction between the sheet and the guide is prevented, thereby restraining the image quality deterioration.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: May 5, 1998
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Keiji Ban, Tetsuro Tomoe, Masami Fuchi, Hiroaki Tsuchiya, Osamu Yoshimura, Shinichi Tanaka
  • Patent number: 5617193
    Abstract: A conveying guide for conveying a sheet onto which an image has been transferred is made of a synthetic resin having a resistance higher than the resistance of the transfer sheet. The upstream side end of the upper surface of the conveying guide is located sufficiently lower than the position at which the sheet is separated from the surface of the photoreceptor drum. With these arrangements, the charging of the conveying guide due to the friction between the sheet and the guide is prevented, thereby restraining the image quality deterioration.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: April 1, 1997
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Keiji Ban, Tetsuro Tomoe, Masami Fuchi, Hiroaki Tsuchiya, Osamu Yoshimura, Shinichi Tanaka
  • Patent number: 5485247
    Abstract: A paper feeding device is capable of judging that a paper jam occurs on the basis of output from a first paper detecting switch and a second paper detecting switch. These paper detecting switches are respectively provided ahead of and behind a registration roller which feeds paper sheets to an image forming section. If the first paper detecting switch is turned on when a predetermined time has elapsed since the registration roller started to feed a paper sheet to the image forming section, it is judged that a duplicate paper feeding state has occurred where a plurality of paper sheets are simultaneously fed. If the second paper detecting switch is turned off in the case where it is judged that a duplicate paper feeding state has occurred, it is judged that a paper jam has not occurred. The registration roller is stopped so it will later be ready to feed the subsequent paper sheet.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: January 16, 1996
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Hiroki Morishita, Hiroaki Nakamura, Makoto Eki, Yoshinori Makiura, Masao Otsuka, Kazushiro Taguchi, Keiji Ban
  • Patent number: 5477314
    Abstract: An apparatus for conveying sheet members, equipped with a conveyer guide member that extends from the downstream side of a toner image-transfer position of a photosensitive drum toward a fixing unit and a grounding plate member that is disposed on the lower surface side of the conveyer guide member. The conveyer guide member is made of a material having an electric resistance not smaller than the electric resistance of the sheet member, and the grounding plate member is made of a material having an electric resistance smaller than the electric resistance of the conveyer guide member.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: December 19, 1995
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Hiroaki Tsuchiya, Tetsuro Tomoe, Osamu Yoshimura, Masami Fuchi, Shinichi Tanaka, Keiji Ban