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:
Feb. 25, 1997
Filed:
Sep. 27, 1995
Shinsuke Kikui, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A voltage is supplied to a charging member by a voltage supplying device, the charging member contacts a photosensitive body, which is rotating in a predetermined direction, in order to charge its surface, temperature of the charging member is detected by a temperature detector, and the voltage to be supplied by the voltage supplying device is corrected by a voltage correcting device in accordance with the result of detection by the temperature detector. At that time, since the quality of an image is stabilized by correction of a reference supplying voltage in accordance with a target electric potential variable depending on change of temperature of the charging member, the electric potential to be charged to the surface of the photosensitive body has a plurality of target values, a reference value of the voltage to be supplied by the voltage supplying device is set per each target value, and a correction rule for a supplying voltage to be corrected by the voltage correcting device is made different by a correction rule changing device per each reference value for a target value of each electric potential to be charged.