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. 16, 2010
Filed:
Dec. 13, 2007
Shinichiro Fujimori, Kanagawa, JP;
Shinichiro Fujimori, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
In a configuration with a plurality of developing units, an influx of air into one developing unit from another developing unit can be blocked with a simple configuration. An operation section for a developing unit that is not in operation rotates a developer roll in the reverse direction to move developer accumulated on a pickoff pole, and fills a clearance formed between a housing and the developer roll with the developer so that the air flow of the developing unit that is not in operation is blocked. Accordingly, even if a difference in pressure between a developing unit that is in operation and a developing unit that is not in operation occurs, an air flow from the developing unit in operation to the developing unit not in operation is not apt to be formed, and an influx of air into the developing unit that is not in operation is blocked.