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:
Jan. 09, 2018
Filed:
Sep. 30, 2016
Tatsuya Ohhira, Kanagawa, JP;
Atsushi Kurokawa, Kanagawa, JP;
Masayuki Yamane, Kanagawa, JP;
Keiichi Yoshida, Kanagawa, JP;
Toshiki Hayashi, Kanagawa, JP;
Sayuri Katoh, Sagamihara-shi, JP;
Tatsuya Ohhira, Kanagawa, JP;
Atsushi Kurokawa, Kanagawa, JP;
Masayuki Yamane, Kanagawa, JP;
Keiichi Yoshida, Kanagawa, JP;
Toshiki Hayashi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device includes a developer bearer, a magnetic field generator, a casing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.