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:
Feb. 25, 2014
Filed:
Apr. 16, 2012
Masahiro Kurachi, Susono, JP;
Hidenori Satoh, Odawara, JP;
Kazutoshi Ishida, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a developing roller in which: even when the roller is stored under a high-temperature, high-humidity environment over a long period of time, bleeding is suppressed; and the fusion of toner to its surface upon repeated output of images under low temperature and low humidity is suppressed. The developing roller includes: a mandrel; an elastic layer on an outer periphery of the mandrel; and a surface layer on an outer periphery of the elastic layer, in which: the surface layer contains carbon black and a polyester-polyurethane resin containing a specific structure; and the surface layer has a storage modulus E' as measured at a temperature of 0° C. and a frequency of 10 Hz of 5 MPa or more and 20 MPa or less.