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. 06, 2016
Filed:
Sep. 23, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Mitsuhiro Furukawa, Chofu, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/09 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0921 (2013.01);
Abstract
A development device including a plurality of development sleeves and conducting development sleeve end portion seal using magnet members, a second magnetic pole and a third magnetic pole of a magnet incorporated in a second developer bearing member form repulsive poles. A position on the magnet member facing a rotation direction downstream end of the second developer bearing member is configured to be included in a zero Gauss zone. As a result, developer leak in the development sleeve rotation direction from between two development sleeves is suppressed.