Patents by Inventor Yasuhito ANNAKA

Yasuhito ANNAKA 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).

  • Charging device, image former, and image forming apparatus that electrically charge a surface of a charging target member
    Patent number: 10788768
    Abstract: A charging device includes a charging member and a cleaning member. The charging member electrically charges a surface of a charging target member and is rotatable while being in contact with the surface of the charging target member. The cleaning member is in contact with a surface of the charging member and removes a foreign object attached to the surface of the charging member. Surface free energy of the surface of the charging member is 5.00 dynes per centimeter or more. A dynamic friction coefficient of the surface of the charging member and a surface of the cleaning member falls within a range from 0.48 to 0.88 both inclusive. The surface free energy and the dynamic friction coefficient satisfy a relation represented by the following expression (1). E??63?+69??(1) “E” is the surface free energy in dynes per centimeter, and “?” is the dynamic friction coefficient.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: September 29, 2020
    Assignee: Oki Data Corporation
    Inventors: Daiki Morimoto, Yasuhito Annaka
  • CHARGING DEVICE, IMAGE FORMER, AND IMAGE FORMING APPARATUS
    Publication number: 20200209778
    Abstract: A charging device includes a charging member and a cleaning member. The charging member electrically charges a surface of a charging target member and is rotatable while being in contact with the surface of the charging target member. The cleaning member is in contact with a surface of the charging member and removes a foreign object attached to the surface of the charging member. Surface free energy of the surface of the charging member is 5.00 dynes per centimeter or more. A dynamic friction coefficient of the surface of the charging member and a surface of the cleaning member falls within a range from 0.48 to 0.88 both inclusive. The surface free energy and the dynamic friction coefficient satisfy a relation represented by the following expression (1). E??63?+69??(1) “E” is the surface free energy in dynes per centimeter, and “u” is the dynamic friction coefficient.
    Type: Application
    Filed: October 18, 2019
    Publication date: July 2, 2020
    Applicant: Oki Data Corporation
    Inventors: Daiki MORIMOTO, Yasuhito ANNAKA