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. 15, 2013
Filed:
Jul. 27, 2011
Yuji Suzuki, Tokyo, JP;
Akihiro Takayama, Kanagawa, JP;
Kentarou Nodera, Kanagawa, JP;
Hiroyuki Uenishi, Kanagawa, JP;
Susumu Tateyama, Kanagawa, JP;
Shinnosuke Koshizuka, Kanagawa, JP;
Tatsuya Kubo, Tokyo, JP;
Kohichi Yamazaki, Kanagawa, JP;
Yuji Suzuki, Tokyo, JP;
Akihiro Takayama, Kanagawa, JP;
Kentarou Nodera, Kanagawa, JP;
Hiroyuki Uenishi, Kanagawa, JP;
Susumu Tateyama, Kanagawa, JP;
Shinnosuke Koshizuka, Kanagawa, JP;
Tatsuya Kubo, Tokyo, JP;
Kohichi Yamazaki, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A development device includes a developer bearer to carry the developer to a development range, a magnetic field generator disposed inside the developer bearer for generating magnetic force, a developer regulator for adjusting an amount of the developer, a developer supply compartment disposed adjacent to the developer bearer, separated by a side wall from a portion where the developer bearer is provided, a developer agitator provided in the supply compartment, and a blocker disposed above the side wall of the supply compartment across a supply gap through which the developer moves from the supply compartment. The magnetic field generator has an attraction magnetic pole and a regulation magnetic pole. The blocker prevents the developer blocked by the developer regulator from moving along a magnetic force line of the regulation magnetic force toward the circumferential surface of the developer bearer.