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:
Sep. 04, 2012
Filed:
Oct. 05, 2011
Tomoyuki Ichikawa, Kanagawa, JP;
Junichi Matsumoto, Kanagawa, JP;
Nobuo Iwata, Kanagawa, JP;
Natsumi Katoh, Kanagawa, JP;
Tomoyuki Ichikawa, Kanagawa, JP;
Junichi Matsumoto, Kanagawa, JP;
Nobuo Iwata, Kanagawa, JP;
Natsumi Katoh, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing apparatus for an image forming apparatus. In order to suppress toner scattering that may occur after a development operation has been halted for a long time, the developer is transferred to a developer storage unit on the exterior of the developing machine when the development operation ends. A range in which an angle of a restricting member upstream side central angle α, which is a central angle of the surface of a developing roller on the upstream side of a restricting member opposing position opposing a developer amount restricting member in a surface motion direction of the developing roller, is not less than 0° and not more than 60° is set as a low magnetic flux density area γ in which the maximum value of a normal direction magnetic flux density on the surface of the developing roller is not more than 30 mT.