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:
Nov. 26, 2013
Filed:
Dec. 06, 2011
Erika Uematsu, Fukui, JP;
Arihiro Yamamoto, Ushiku, JP;
Syouji Inoue, Ushiku, JP;
Canon Kasei Kabushiki Kaisha, Tsukuba-shi, JP;
Abstract
A cleaning blade for an electrophotographic apparatus including a thermosetting polyurethane elastomer blade member, in which in the blade member, a concentration of nitrogen is gradually increased from an inside of a contact region to contact the image bearing member toward the surface of the contact region; and a relationship between an amount of the concentration of nitrogen to be changed Δ1=N−Nand an amount of the concentration of nitrogen to be changed Δ2=N−Nis Δ1>Δ2 wherein a concentration of nitrogen in the surface Nis not less than 1.5 wt % and not more than 20.0 wt %, a concentration of nitrogen Nat a depth in which the concentration of nitrogen is no longer changed is not less than 0.7 wt % and not more than 10 wt %, and Nis a concentration of nitrogen at a depth of 5 μm.