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:
Aug. 30, 2011
Filed:
Mar. 05, 2008
Emi Kita, Tokyo, JP;
Koichi Kato, Kanagawa, JP;
Kiyonori Tsuda, Kanagawa, JP;
Yuki Oshikawa, Kanagawa, JP;
Susumu Tateyama, Tokyo, JP;
Yoshitaka Fujinuma, Tokyo, JP;
Emi Kita, Tokyo, JP;
Koichi Kato, Kanagawa, JP;
Kiyonori Tsuda, Kanagawa, JP;
Yuki Oshikawa, Kanagawa, JP;
Susumu Tateyama, Tokyo, JP;
Yoshitaka Fujinuma, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The developer conveyance amount on the upstream side of an agitation conveyance path in a developer conveyance direction becomes larger than the amount of developer to be transported from a recovery conveyance path to the agitation conveyance path, by making the developer conveyance amount on the upstream side of an agitating screw in the developer conveyance direction equal to or larger than the developer conveyance amount on the downstream side of a recovery screw in the developer conveyance direction. Accordingly, the bulk of the developer existing on the downstream side of the recovery conveyance path in the developer conveyance direction can be prevented from reaching the level where the recovered developer re-adheres to a developing roller, and further the developer existing on the downstream side of the recovery conveyance path in the developer conveyance direction can be prevented from re-adhering to the developing roller.