Patents by Inventor Asami Mae

Asami Mae 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 with a device and a method to increase contact area between a transfer sheet and an image carrier
    Patent number: 6101361
    Abstract: An image forming apparatus and method in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: August 8, 2000
    Assignee: Ricoh Co., Ltd.
    Inventors: Kenji Karashima, Kohichi Yamazaki, Kentaro Matsumoto, Kazuhiko Yuuki, Manabu Mochizuki, Noriyuki Usui, Asami Mae, Masakuni Konja
  • Image forming apparatus with a device to increase contact area between a transfer sheet and an image carrier
    Patent number: 5884134
    Abstract: An image forming apparatus in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit. The conveying guide includes a guiding member to direct the conveying direction of the transfer sheet upward when the leading edge of the transfer sheet contacts the guiding member and to convey the transfer sheet at a part of the conveying guide or the guiding member in a position higher than the position of the leading edge of the transfer sheet contacting the conveying guide or the guiding member, so that the contact area between the transfer sheet and the image carrier increases.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: March 16, 1999
    Assignee: Ricoh Co., Ltd.
    Inventors: Kenji Karashima, Kohichi Yamazaki, Kentaro Matsumoto, Kazuhiko Yuuki, Manabu Mochizuki, Noriyuki Usui, Asami Mae, Masakuni Konja
  • Developing device for image forming apparatus
    Patent number: 5864733
    Abstract: An image forming apparatus including a photoconductive drum, a charger which charges the photoconductive drum, an exposing device which irradiates light to the charged photoconductive drum for forming an electrostatic latent image on the photoconductive drum, a developing device which has two component developer which includes magnetic toner and magnetic carriers and a transfer charger to transfer the developed image to a sheet of paper. The bias voltages of the charger, the developing device and the transfer charger are applied from a common high voltage power source. A developing starting voltage of the developing device is higher than a residual voltage of the photoconductive drum.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: January 26, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Asami Mae, Manabu Mochizuki, Kentaro Matsumoto, Kenji Karashima, Kazuhiko Yuki, Chikara Imai, Hajime Oyama, Noriyuki Usui