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. 24, 2006
Filed:
Sep. 30, 2004
Minoru Nakamura, Shizuoka, JP;
Arihiro Yamamoto, Shizuoka, JP;
Kazutoshi Ishida, Shizuoka, JP;
Takeshi Suzuki, Chiba, JP;
Minoru Nakamura, Shizuoka, JP;
Arihiro Yamamoto, Shizuoka, JP;
Kazutoshi Ishida, Shizuoka, JP;
Takeshi Suzuki, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing roller is provided having an elastic layer and a surface layer superposed thereon. The surface layer is formed of a resin material containing nitrogen atoms, and contains at least two types of particles, organic-compound particles (M) and organic-compound particles (N). The particles (N) are composed of nitrogen-containing heterocyclic-compound particles. The number-average particle diameter of the particles (N) in the surface layer is smaller than the number-average particle diameter of the particles (M) in the surface layer. Where the universal hardness of the elastic layer is represented by A and the universal hardness of the developing roller is represented by B, they satisfies 0.9≦B/A≦1.8.