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:
May. 09, 2006
Filed:
Nov. 15, 2001
Keiji Komoto, Numazu, JP;
Tsuyoshi Takiguchi, Shizuoka-ken, JP;
Tatsuhiko Chiba, Kamakura, JP;
Michihisa Magome, Shizuoka-ken, JP;
Akira Hashimoto, Shizuoka-ken, JP;
Takeshi Kaburagi, Susono, JP;
Keiji Komoto, Numazu, JP;
Tsuyoshi Takiguchi, Shizuoka-ken, JP;
Tatsuhiko Chiba, Kamakura, JP;
Michihisa Magome, Shizuoka-ken, JP;
Akira Hashimoto, Shizuoka-ken, JP;
Takeshi Kaburagi, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an image forming system, an image-bearing member having a photoconductor layer comprising an Si-based non-single crystal material is charged at a relatively low potential of 250 to 600 volts by a contact charging member in the presence of electroconductive fine powder. An electrostatic latent image formed on the image-bearing member is developed with a magnetic toner which includes magnetic toner particles comprising at least a binder resin and a magnetic iron oxide, and inorganic fine powder and electroconductive fine powder present at the surface of the magnetic toner particles. The magnetic toner has a weight-average particle size of 3-10 μm and an average circularity of 0.950 to 0.995, and contains 0.05 to 3.00% of isolated iron-containing particles.