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. 17, 1999
Filed:
Feb. 14, 1997
Yoshifumi Hano, Susono, JP;
Shuichi Aita, Mishima, JP;
Tsutomu Kukimoto, Yokohama, JP;
Tsuyoshi Takiguchi, Shizuoka-ken, JP;
Fumihiro Arahira, Shizuoka-ken, JP;
Yuji Ishihara, Kawasaki, JP;
Kiyoshi Mizoe, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A charging apparatus which comprises an electrophotographic photosensitive member and a charging member which comprises magnetic particles and placed in contact with the electrophotographic photosensitive member to charge the electrophotographic photosensitive member upon application of a voltage, wherein each magnetic particle has a surface layer containing a polyolefin resin of which weight average molecular weight is 10,000 or more, and has a volume resistivity of 1.times.10.sup.4 to 1.times.10.sup.11 .OMEGA.cm.