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:
Mar. 01, 2011
Filed:
Feb. 28, 2008
Norio Tomiie, Osaka, JP;
Shinki Miyaji, Osaka, JP;
Yoshihiko Maruyama, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
An aspect of the invention provides a charging control device of a color image forming apparatus, and the charging control device can properly control a charging potential of an image bearing body such that fog and uneven density are not generated even in a low-temperature environment. The image forming apparatus includes a high-voltage generation circuitwhich applies an oscillating voltage to the charging memberdisposed in contact with an image bearing body, a direct-current voltage and an alternating-current voltage being superimposed to form the oscillating voltage; a current detection unitwhich detects a direct current value passed from the charging memberto the image bearing body; and a voltage control unitwhich controls the alternating-current voltage such that the detected direct-current value is maintained in a target current range. The image forming apparatus also includes an aging control unitto perform running-in. The aging control unitrotates and drives the image bearing bodywhile retaining the alternating-current voltage and the direct-current voltage at previously-set predetermined voltages.