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:
Jun. 19, 1990
Filed:
Jul. 20, 1988
Teruhiko Noguchi, Osaka, JP;
Yuji Okamoto, Nara, JP;
Yoshiharu Tsujimoto, Nara, JP;
Hiroshi Kinashi, Kyoto, JP;
Yuhi Yui, Osaka, JP;
Itaru Kawabata, Osaka, JP;
Tooru Nakata, Osaka, JP;
Jitsuo Masuda, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Before a photoreceptor for an electrophotographic image forming apparatus is uniformly charged at the beginning of a process for forming a latent electrostatic image thereon, the photoreceptor is exposed to charge-removing light for stabilizing the surface potential such that a high-quality image can be obtained. The level of exposure is modified in view of the fatigue and recovery characteristics of the photoreceptor. During a continuous operation of the photoreceptor, the level is logarithmically reduced. When the photoreceptor is started again after a rest period, the initial level of exposure is adjusted by logarithmically increasing it according to the length of the rest period as well as in view of the level of exposure prior to the rest period.