Patents by Inventor Tetsutaro YASUDA

Tetsutaro YASUDA 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).

  • Sheet feeder and image forming apparatus incorporating same
    Patent number: 10124970
    Abstract: A sheet feeder, which is incorporated in an image forming apparatus, includes an endless attraction belt that is rotatably disposed facing a top surface of a sheet stack, a belt charger to attract an uppermost sheet of the sheet stack, and a sheet separator to press the attraction belt against the sheet stack, bend a contact region to which the uppermost sheet is attracted and contacted to the attraction belt, and separate the uppermost sheet from a subsequent sheet or other sheet of the sheet stack. In this configuration, a curvature of a contact surface of the sheet separator with respect to the attraction belt is changeable.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: November 13, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshikuni Ishikawa, Tetsutaro Yasuda, Manabu Nonaka
  • SHEET FEEDER AND IMAGE FORMING APPARATUS INCORPORATING SAME
    Publication number: 20160194166
    Abstract: A sheet feeder, which is incorporated in an image forming apparatus, includes an endless attraction belt that is rotatably disposed facing a top surface of a sheet stack, a belt charger to attract an uppermost sheet of the sheet stack, and a sheet separator to press the attraction belt against the sheet stack, bend a contact region to which the uppermost sheet is attracted and contacted to the attraction belt, and separate the uppermost sheet from a subsequent sheet or other sheet of the sheet stack. In this configuration, a curvature of a contact surface of the sheet separator with respect to the attraction belt is changeable.
    Type: Application
    Filed: February 25, 2016
    Publication date: July 7, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Yoshikuni ISHIKAWA, Tetsutaro YASUDA, Manabu NONAKA
  • Sheet feeder and image forming apparatus incorporating same
    Patent number: 9302868
    Abstract: A sheet feeder, which is incorporated in an image forming apparatus, includes an endless attraction belt that is rotatably disposed facing a top surface of a sheet stack, a belt charger to attract an uppermost sheet of the sheet stack, and a sheet separator to press the attraction belt against the sheet stack, bend a contact region to which the uppermost sheet is attracted and contacted to the attraction belt, and separate the uppermost sheet from a subsequent sheet or other sheet of the sheet stack. In this configuration, a curvature of a contact surface of the sheet separator with respect to the attraction belt is changeable.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: April 5, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshikuni Ishikawa, Tetsutaro Yasuda, Manabu Nonaka
  • SHEET FEEDER AND IMAGE FORMING APPARATUS INCORPORATING SAME
    Publication number: 20140312557
    Abstract: A sheet feeder, which is incorporated in an image forming apparatus, includes an endless attraction belt that is rotatably disposed facing a top surface of a sheet stack, a belt charger to attract an uppermost sheet of the sheet stack, and a sheet separator to press the attraction belt against the sheet stack, bend a contact region to which the uppermost sheet is attracted and contacted to the attraction belt, and separate the uppermost sheet from a subsequent sheet or other sheet of the sheet stack. In this configuration, a curvature of a contact surface of the sheet separator with respect to the attraction belt is changeable.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 23, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshikuni ISHIKAWA, Tetsutaro YASUDA, Manabu NONAKA