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. 25, 1982
Filed:
Aug. 25, 1980
Manabu Mochizuki, Yokohama, JP;
Masahide Harada, Tokyo, JP;
Mitsuo Tanaka, Machida, JP;
Kouji Suzuki, Yokohama, JP;
Kazuaki Tagawa, Tokyo, JP;
Kazuo Kobayashi, Kawasaki, JP;
Ricoh Company, Ltd., , JP;
Abstract
A magnetic brush development apparatus includes a developer containing magnetic powder therein which is attracted to a non-magnetic support member by a magnet arranged therein. The developer is brought into contact with a latent electrostatic image bearing member which is located in a development section for developing the latent electrostatic image. The magnet has substantially one magnetic pole portion capable of producing a magnetic field having a plurality of peaks in the intensity of the magnetic field located in the development section.