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. 22, 1991
Filed:
Dec. 13, 1989
Applicant:
Inventor:
Masahide Ueda, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355221 ; 355219 ;
Abstract
Action of a charging device in an image forming apparatus is started with an output value different from a predetermined value which is set according to a characteristic of attenuation of a photoconductor, and the value is controlled so as to coincide with the predetermined value after a predetermined period of time has elapsed. It is further controlled so as to become different output characteristics at an initial stage and the latter half stage of the predetermined period of time to charge the photoconductor corresponding to actual difference in the state of attenuation caused by the difference in a period of duration when it is used and when it is not used.