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. 17, 2009
Filed:
Mar. 02, 2004
Motoyuki Itoyama, Kyoto, JP;
Syouichi Fujita, Kashiba, JP;
Hirofumi Sakita, Tenri, JP;
Shuichi Morikuni, Yamatokoriyama, JP;
Motoyuki Itoyama, Kyoto, JP;
Syouichi Fujita, Kashiba, JP;
Hirofumi Sakita, Tenri, JP;
Shuichi Morikuni, Yamatokoriyama, JP;
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Abstract
A reference developing image is formed on a photoreceptor drum under an image forming condition measured in advance, and the density of this reference developing image is detected. A development bias voltage is corrected based on the detection result, and when a correction value of the development bias voltage exceeds a predetermined range, a reference output voltage of an ATC sensor for detecting the density of toner in a developing device is corrected based on the detected value of humidity around the developing device, the frequency of use of the apparatus, and the agitation stress of developer.