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:
Apr. 06, 2004
Filed:
Oct. 30, 2002
Ryoji Nishimura, Osaka, JP;
Yasuyuki Hirai, Osaka, JP;
Kotaro Kawasaki, Osaka, JP;
Satoru Yonemoto, Osaka, JP;
Naoyuki Ishida, Osaka, JP;
Yukihiro Ito, Osaka, JP;
Hideki Kitagawa, Osaka, JP;
Hideki Takeda, Osaka, JP;
Shinsuke Kawashima, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
In a developing device according to the present invention, a developing roller has a fixed shaft and a sleeve . The length of a draw-up magnetic pole N provided in the fixed shaft is made shorter than the length of a main magnetic pole N . Accordingly, the amount of a developer adhering to both ends of an outer peripheral surface of the sleeve is reduced, so that the density of the developer at both the ends of the sleeve is maintained in suitable conditions in a state where the developer is over the main magnetic pole N