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:
Aug. 21, 2001
Filed:
Sep. 20, 1999
Akihiro Kawasaki, Itami, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
A conductive contact member,is disposed to come into contact with a developer carrying member,at the upstream side of a developing region,with respect to the developer conveying direction. Voltage applying members,and,are also provided for applying the developer carrying member,with a predetermined direct voltage as a developing voltage, applying the contact member,with a direct voltage which has the same polarity as the developing voltage and has an absolute value larger than the developing voltage, and applying between the developer carrying member,and the contact member,an alternating voltage. A ratio t,/t,of a time t,for applying a voltage of absolute value larger than that of a center voltage of the alternating voltage to a time t,for applying a voltage of absolute value smaller than that of the center voltage of the alternating voltage satisfies a relation of t,/t,>1.