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. 27, 2016
Filed:
Jan. 13, 2016
Fuji Xerox Co., Ltd., Tokyo, JP;
Kenta Urayama, Kanagawa, JP;
Yasuaki Watanabe, Kanagawa, JP;
Jun Abe, Kanagawa, JP;
Tomoyuki Yoshii, Kanagawa, JP;
Takashi Ochi, Kanagawa, JP;
Shinji Okuyama, Kanagawa, JP;
Fumiyuki Honda, Kanagawa, JP;
Shiho Matsuda, Kanagawa, JP;
FUJI XEROX CO., LTD., Tokyo, JP;
Abstract
A developing device includes a developing sleeve and a regulation portion. The developing sleeve includes a magnetism generating portion to which magnetic poles are attached. The developing sleeve holds a developer on an outer circumferential surface. The regulation portion includes a magnetic plate. A first segment connecting a peak position of the magnetic pole disposed at a position facing the magnetic plate and an axial center of the developing sleeve has an angle, with respect to a second segment connecting the magnetic plate and the axial center, equal to or less than 7 degrees on a downstream side in a rotation direction of the developing sleeve and equal to or less than 6 degrees on an upstream side in the rotation direction. An angle of a half value width of the magnetic pole is equal to or greater than 41 degrees to equal to or less than 52 degrees.