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:
Dec. 07, 2010
Filed:
Nov. 26, 2008
Ryosuke Kanai, Numazu, JP;
Yosuke Kishi, Suntou-gun, JP;
Ryosuke Kanai, Numazu, JP;
Yosuke Kishi, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a standard exposure device () adjusted to emit light of a predetermined light quantity, and a control device configured to determine light quantity of the pre-charge exposure device in an image-forming period based on the first and the second charging current values, wherein first charging current value is detected when an area on a photosensitive member surface is recharged by the contact charging member, in a case where the photosensitive member is exposed by turning on the standard exposure device without turning on a pre-charge exposure device, and second charging current value is detected when an area on the photosensitive member surface is recharged by the contact charging member, in a case where the photosensitive member charged by applying a predetermined voltage by the contact charging member is exposed by turning on the pre-charge exposure device without turning on the standard exposure device.