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:
Mar. 21, 2017
Filed:
Feb. 26, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Yusuke Ishida, Toride, JP;
Katsuya Nose, Matsudo, JP;
Kosuke Takeuchi, Abiko, JP;
Toshihisa Yago, Toride, JP;
Fumiyoshi Saito, Toride, JP;
Naoki Mugita, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing unit includes a developing container, a developing sleeve, a developer regulating member, and a magnetic field generating portion. The magnetic field generating portion includes a drawing-up pole and a cut pole. In addition, in a peak-to-peak area, the magnetic field generating portion includes at least one of an Fr flat area in which Fr is substantially constant and an Fr attenuation area in which Fr attenuates toward the cut pole side from the drawing-up pole side, and is configured that Fθ is oriented toward the same direction as a direction of rotation of the developing sleeve in the entire peak-to-peak area.