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:
Sep. 24, 2002
Filed:
Dec. 29, 2000
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In the conventional types of Active Transfer Voltage Control (ATVC) system, it is assumed that transferring material has definite impedance. When a toner image is transferred to the transferring material which is in a condition where only the top of the transferring material has high impedance, the conventional ATVC system maintains a transferring current higher than the critical transferring current value with the top of the transferring material and applies a bias voltage at a corrected level, whereby the ATVC system may supply an excessive current to a portion of the photosensitive drum corresponding to a location which is other than the top having the high impedance and at which a toner image is not formed. Therefore, it is provided, an image forming apparatus which is capable of favorably transferring a toner image regardless of impedance of a transferring material.