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:
Apr. 22, 2008
Filed:
Apr. 17, 2007
Satoshi Otake, Numazu, JP;
Masayoshi Shimamura, Yokohama, JP;
Yusutaka Akashi, Yokohama, JP;
Kazunori Saiki, Yokohama, JP;
Nene Dojo, Numazu, JP;
Minoru Ito, Susono, JP;
Michihisa Magome, Shizuoka-ken, JP;
Eriko Yanase, Shizuoka-ken, JP;
Tatsuya Nakamura, Mishima, JP;
Satoshi Otake, Numazu, JP;
Masayoshi Shimamura, Yokohama, JP;
Yusutaka Akashi, Yokohama, JP;
Kazunori Saiki, Yokohama, JP;
Nene Dojo, Numazu, JP;
Minoru Ito, Susono, JP;
Michihisa Magome, Shizuoka-ken, JP;
Eriko Yanase, Shizuoka-ken, JP;
Tatsuya Nakamura, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing method is provided in which a developer is carried on a developer carrying member, a thin layer of the developer is formed thereon and a latent image on a latent image bearing member is developed with a developer. The developer is composed of magnetic toner particles containing a binder resin and a magnetic powder. The magnetic powder has a saturation magnetization of 67.0 Am/kg to 75.0 Am/kg in a magnetic field of 79.6 kA/m (1,000 oersteds) and has a residual magnetization of 4.5 Am/kg or less. In the surface profile of the conductive resin coat layer of the developer carrying member, the relationship 1.00≦S/A≦1.65 is satisfied where S is a surface area of regions zoned by an area A of microscopic unevenness regions from which parts exceeding a reference plane by 0.5×r (r: weight average particle diameter (μm) of a toner used) or more have been excluded.