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:
Mar. 13, 2007
Filed:
Oct. 17, 2003
Sumio Kamoi, Tokyo, JP;
Tsuyoshi Imamura, Kanagawa, JP;
Mieko Kakegawa, Kanagawa, JP;
Noriyuki Kamiya, Kanagawa, JP;
Kyohta Koetsuka, Kanagawa, JP;
Masayuki Takeshita, Kanagawa, JP;
Sumio Kamoi, Tokyo, JP;
Tsuyoshi Imamura, Kanagawa, JP;
Mieko Kakegawa, Kanagawa, JP;
Noriyuki Kamiya, Kanagawa, JP;
Kyohta Koetsuka, Kanagawa, JP;
Masayuki Takeshita, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In a developing device for an image forming apparatus of the present invention, use is made of a magnetic molding produced by compression-molding a magnet compound material in a magnetic field. The magnet compound material contains, in addition to magnetic powder and fine, thermoplastic resin grains that are major components, at least one of a pigment and a charge control agent.