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:
Jul. 11, 2017
Filed:
Sep. 21, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Akihiro Noguchi, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A multipolar magnet is arranged inside a developer bearing member. A partitioning wall is arranged such that an apex position thereof is located between the developer bearing member and a first conveying member, and is extended up to a position which is located below an upper end position of a zone. A plurality of concaved portions is formed on the surface of the developer bearing member at an interval. Each of the plurality of concaved portions has such an opening shape that a maximum diameter of an inscribed circle is equal to or greater than a diameter of an average grain size of a carrier, and is formed such that the carrier with the average grain size is able to enter each of the concaved portions by a depth that is equal to or greater than a radius thereof.