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. 19, 2004
Filed:
Dec. 09, 2002
Daisuke Tanaka, Shizuoka, JP;
Yosuke Morikawa, Kanagawa, JP;
Tatsuya Ikezue, Kanagawa, JP;
Kouichi Nakata, Shizuoka, JP;
Kimihiro Yoshimura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electrophotographic photosensitive member comprising a cylindrical support, and provided thereon a photosensitive layer and a protective layer in this order, which cylindrical support has an outer diameter of less than 30 mm, the difference between a coefficient of thermal expansion &agr; measured from the top of the protective layer and a coefficient of thermal expansion &agr; measured after the protective layer has been removed, |&agr; −&agr; |, is more than 5.0×10 ° C. to less than 1.0×10 ° C. , and the modulus of elastic deformation We % measured from the top of the protective layer is more than 30% to less than 60%. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.