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:
Jun. 16, 2015
Filed:
Oct. 23, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Nobuyoshi Yoshida, Suntou-gun, JP;
Yoshihiro Mitsui, Numazu, JP;
Kodai Hayashi, Suntou-gun, JP;
Hisashi Taniguchi, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a control unit controlling first and second voltage application mechanisms and shifting a difference Vdif (=Vrs−Vdr) between Vrs and Vdr toward polarity opposite to normal charge polarity of a developer as S decreases, where S is an absolute value of a speed difference between a circumferential speed of an image bearing member, which rotates while bearing an electrostatic latent image and a circumferential speed of a developer bearing member, which rotates at a constant circumferential speed ratio with respect to the image bearing member to develop the electrostatic latent image while bearing the developer, Vdr is a voltage that the first voltage application mechanism applies to the developer bearing member, and Vrs is a voltage that the second voltage application mechanism applies to the developer supply member.