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:
Nov. 12, 2013
Filed:
Apr. 24, 2012
Fumiteru Gomi, Abiko, JP;
Fumiteru Gomi, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a photosensitive member; a charging device for electrically charging the photosensitive member; an exposure device for exposing to light the photosensitive member electrically charged by the charging device to form an electrostatic image; a developing device for developing the electrostatic image with toner to form a first patch and a second patch; a detecting device for detecting a density of the first and second patches formed by the developing device; and a control device for controlling an image forming condition on the basis of a difference in density between the first patch formed on the photosensitive member at a portion where a surface potential of the photosensitive member is zero volts and the second patch formed at a portion electrically charged by applying a predetermined charging bias to the charging device.