The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 2005
Filed:
Apr. 26, 2002
Yasushi Shimizu, Shizuoka-ken, JP;
Junichi Kato, Shizuoka-ken, JP;
Hiroshi Satoh, Mishima, JP;
Masahiro Yoshida, Yokohama, JP;
Hiroyuki Oba, Suntoh-gun, JP;
Yasushi Shimizu, Shizuoka-ken, JP;
Junichi Kato, Shizuoka-ken, JP;
Hiroshi Satoh, Mishima, JP;
Masahiro Yoshida, Yokohama, JP;
Hiroyuki Oba, Suntoh-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member; a charging member, contactable to the image bearing member, for electrically charging the image bearing member at a charging position; developing means for developing an electrostatic image formed on the image bearing member with a developer; wherein when a first area on the image bearing member which is going to be an image formation area is at the charging position, the charging member moves with a peripheral speed difference relative to the image bearing member, and when a second area on the image bearing member which is a part of an area which is going to be a non-image formation area is at the charging position, the charging member moves substantially without a peripheral speed difference relative to the image bearing member, and wherein a collecting electric field is formed for collecting the developer from the second area to the developing means.