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:
May. 17, 2016
Filed:
Jul. 11, 2014
Atsushi Nakamoto, Kanagawa, JP;
Tadashi Ogawa, Tokyo, JP;
Koichi Yamazaki, Kanagawa, JP;
Hironori Ohshima, Kanagawa, JP;
Atsushi Nakamoto, Kanagawa, JP;
Tadashi Ogawa, Tokyo, JP;
Koichi Yamazaki, Kanagawa, JP;
Hironori Ohshima, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A drawing-up magnetic pole and a control magnetic pole of a magnetic field generator that is disposed in a developer carrier are adjacent to each other and a prevention member is provided that secures, between the prevention member and an upper end of a side wall of a developer supply conveyance path, a supply path through which a developer in the developer supply conveyance path passes toward the developer carrier at least over the entire width of a developing area and that prevents a control retained developer, which is prevented by a developer control member from passing through a control gap, from moving toward the surface of the developer carrier along lines of the control magnetic force. The peak of the magnetic flux density of the drawing-up magnetic pole in the normal direction is disposed below the lower end of the supply path.