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:
Sep. 20, 1994
Filed:
Sep. 24, 1993
Yasuhiro Kishimoto, Gifu, JP;
Kunio Tsuboi, Hyogo, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
An electrophotographing apparatus includes a photosensor for sensing or detecting a reflectance of an original, and an output voltage of the photosensor is sent to a microcomputer. In response to the output voltage of the photosensor, the microcomputer controls a bias voltage which is applied to an electric conductive substrate of a photoreceptor from a bias voltage source. The bias voltage is adjusted such that a change of an exposed voltage according to the reflectance of the original can be canceled, and resultingly, the exposed voltage is kept constant. On the other hand, a developer is connected to the ground, and therefore, a voltage difference between the exposed voltage and a developing voltage becomes constant.