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:
May. 24, 2005
Filed:
Jul. 01, 2003
Mitsuhiro Ito, Shizuoka, JP;
Hiroaki Sakai, Shizuoka, JP;
Mitsuhiro Ito, Shizuoka, JP;
Hiroaki Sakai, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides an image forming apparatus where the useful life of the image carrier does not become significantly short. This system has a charging unit, a charge voltage loading unit, an exposure unit, a development unit, an image transfer unit and a control unit, wherein, when the transport interval of plural recording materials is shorter than a predetermined time the AC charge voltage applied to the image carrier during the transport interval is a first AC charge voltage, and when the transport interval is longer than the predetermined time the AC charge voltage applied to the image carrier during the transport interval being a second AC charge voltage, the control unit makes the current running in the charging unit when the second AC charge voltage is applied lower than the current running in the charging unit when the first AC charge voltage is applied.