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:
Apr. 12, 2016
Filed:
Nov. 11, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Kazutaka Yaguchi, Suntou-gun, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes: a charging member; a transfer member; a setting portion for setting a positive-side discharge start voltage when a positive-side voltage relative to a reference potential is applied to the transfer member after a voltage is applied to the charging member so that a surface of the image bearing member is charged to the reference potential by the charging member and for setting a negative-side discharge start voltage when a negative-side voltage relative to the reference potential is applied to the transfer member after the voltage is applied; a calculating portion for calculating a correction amount for correcting a light portion surface potential, of the image bearing member, calculated by the calculating portion on the basis of the positive-side and negative-side discharge start voltages; and a correcting portion for correcting the light portion surface potential by using the correction amount.