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:
Oct. 28, 1997
Filed:
Oct. 06, 1994
Chihiro Komori, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
An electrophotographic recording apparatus comprises a photosensitive drum, a transfer roller, a high voltage power supply circuit for applying a transfer voltage to the transfer roller and a CPU for controlling the entire apparatus. The high voltage power supply circuit supplies an output voltage corresponding to a control signal issued from the CPU as the transfer voltage to the transfer roller. At this time, the high voltage power supply circuit sends a current detection signal to the CPU to inform the same of an output current which flows to the transfer roller. On the other hand, the CPU outputs a control signal to the high voltage power supply circuit, the control signal corresponding to said current detection signal output from the high voltage power supply circuit. As a result, even if the output current is varied depending on the kind of the print medium and the resistance of the transfer roller, it is possible to generate the output voltage in accordance with the varied output current.