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:
Dec. 07, 1999
Filed:
Jul. 15, 1998
Applicant:
Inventors:
Assignee:
Minolta Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
399270 ;
Abstract
A developing device capable of producing images having excellent image density and texture without density irregularities, which includes a developer carrier disposed opposite the image carrier and transporting a developer hell on its surface to a developing region and a voltage supplying unit which applies an alternating current voltage to the developer carrier, the alternating current voltage having a first frequency during a first action period and a second frequency during a second action period, the first action period and the second action period being alternately repeated, the second frequency being higher than the first frequency.