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. 09, 2001
Filed:
Mar. 08, 2000
Applicant:
Inventor:
Yasuyuki Tsutsumi, Iwatsuki, JP;
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/506 ;
U.S. Cl.
CPC ...
G03G 1/506 ;
Abstract
The invention provides a developing unit, and an image forming apparatus using the same, which is capable of suppressing developer in the middle of a developing process in a developing area from remaining on the surface of an electrostatic latent image carrier when the application of oscillatory bias voltage applied to the developer carrier is stopped and of preventing the inside of the image forming apparatus and each member such as transfer member from being contaminated by the developer. The frequency of the oscillatory bias voltage is controlled so as to be higher than a normal frequency when stopping the application of the oscillating bias voltage.