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, 2002
Filed:
Aug. 01, 2001
Applicant:
Inventors:
Hiroshi Abe, Ibaraki, JP;
Akihiro Suzuki, Ibaraki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 1/502 ;
U.S. Cl.
CPC ...
G03G 1/502 ;
Abstract
A conductive member which is to be disposed in contact with an electrophotographic photosensitive member and to which a voltage is to be applied; and which includes a support member and a conductive covering layer provided on the support member. The conductive covering layer includes both a first carbon black having a DBP oil absorption of from 300 cm /100 g to 500 cm /100 g and a second carbon black having a DBP oil absorption of 250 cm /100 g or smaller and showing a pH of 5 or below. Also disclosed are a process cartridge and an electrophotographic apparatus which make use of the conductive member as a primary charging roller.