Patents by Inventor Kei Imaizumi

Kei Imaizumi 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 for electrically charging photosensitive member
    Patent number: 8064791
    Abstract: A charging device includes a rotatable charging member for electrically charging a photosensitive member; and a brush, rotating along a rotational direction of the charging member by contacting the charging member to receive a force, including fibers for cleaning the charging member. The fibers have been subjected to fiber-tilting treatment so that the fibers are tilted in a direction counterdirectionally with a rotational direction of the brush.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: November 22, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kei Imaizumi
  • Image forming apparatus
    Patent number: 7983587
    Abstract: An image forming apparatus which includes a first image forming portion including a first photosensitive member, a first charging member for electrically charging the first photosensitive member to form an image thereon, and a first cleaning brush for cleaning the first charging member, a second image forming portion including a second photosensitive member, a second charging member for electrically charging the second photosensitive member to form an image thereon, and a second cleaning brush which has a longer brush length than that of the first cleaning brush for cleaning the second charging member, a driven mechanism for causing the first cleaning brush to be rotatably driven by the first charging member which is rotatably driven along with rotation of the first photosensitive member, and a drive coupling mechanism configured to drivably couple the second charging member and the second cleaning brush to transmit a driving force from the second charging member which is rotatably driven along with the rotat
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kei Imaizumi
  • CHARGING DEVICE FOR ELECTRICALLY CHARGING PHOTOSENSITIVE MEMBER
    Publication number: 20100247135
    Abstract: A charging device includes a rotatable charging member for electrically charging a photosensitive member; and a brush, rotating along a rotational direction of the charging member by contacting the charging member to receive a force, including fibers for cleaning the charging member. The fibers have been subjected to fiber-tilting treatment so that the fibers are tilted in a direction counterdirectionally with a rotational direction of the brush.
    Type: Application
    Filed: March 30, 2010
    Publication date: September 30, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kei Imaizumi
  • IMAGE FORMING APPARATUS
    Publication number: 20100046998
    Abstract: An image forming apparatus which includes a first image forming portion including a first photosensitive member, a first charging member for electrically charging the first photosensitive member to form an image thereon, and a first cleaning brush for cleaning the first charging member, a second image forming portion including a second photosensitive member, a second charging member for electrically charging the second photosensitive member to form an image thereon, and a second cleaning brush which has a longer brush length than that of the first cleaning brush for cleaning the second charging member, a driven mechanism for causing the first cleaning brush to be rotatably driven by the first charging member which is rotatably driven along with rotation of the first photosensitive member, and a drive coupling mechanism configured to drivably couple the second charging member and the second cleaning brush to transmit a driving force from the second charging member which is rotatably driven along with the rotat
    Type: Application
    Filed: August 17, 2009
    Publication date: February 25, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kei Imaizumi