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:
Jul. 20, 2004
Filed:
Nov. 08, 2001
Shunichi Ebihara, Shizuoka, JP;
Yoshiro Saito, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a detected-current-controlled voltage charging device for charging a transfer material before a toner image is transferred to the transfer material by a transfer device. A current is produced when a voltage is applied to the charger device before the toner image is transferred. The voltage applied to the transferring device when the image-formed portion of the transferring material passes a transferring part is controlled on the basis of a current produced by a predetermined voltage applied to the transfer device when a leading edge portion of the transferring material passes the transferring part, and the predetermined voltage is controlled on the basis of the output from the current detector.