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:
Feb. 15, 2005
Filed:
Nov. 26, 2002
Atsushi Sampe, Yokohama, JP;
Takeyoshi Sekine, Tokyo, JP;
Masayuki Yamane, Kawasaki, JP;
Tokuya Ohjimi, Kawasaki, JP;
Junichi Sano, Yokosuka, JP;
Toshio Koike, Kawasaki, JP;
Fumihiro Sasaki, Fuji, JP;
Hiroto Higuchi, Numazu, JP;
Maiko Kondo, Numazu, JP;
Kunihiro Ohyama, Kawasaki, JP;
Atsushi Sampe, Yokohama, JP;
Takeyoshi Sekine, Tokyo, JP;
Masayuki Yamane, Kawasaki, JP;
Tokuya Ohjimi, Kawasaki, JP;
Junichi Sano, Yokosuka, JP;
Toshio Koike, Kawasaki, JP;
Fumihiro Sasaki, Fuji, JP;
Hiroto Higuchi, Numazu, JP;
Maiko Kondo, Numazu, JP;
Kunihiro Ohyama, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device developing a latent image on a latent image carrier with a developer, and including a casing having an opening facing the latent image carrier and a developer carrier. Also included is a magnetic field generating device including a first magnetic pole generating a magnetic field causing the developer to rise on the developer carrier in a form of a magnet brush in a developing region, and a second magnetic pole generating a magnetic field at a downstream side of the first magnetic pole in a rotating direction of the developer carrier. Further, a toner-scattering restraining device is provided on an end portion of the casing at the downstream side of the developing region, and a magnetic member provided on a side of the toner-scattering restraining device facing the latent image carrier. A peak of a magnetic flux density set by the second magnetic pole in its normal direction is located outside of the opening.