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:
Oct. 24, 2006
Filed:
May. 19, 2003
Tsuyoshi Imamura, Kanagawa, JP;
Sumio Kamio, Tokyo, JP;
Kyohta Koetsuka, Kanagawa, JP;
Noriyuki Kamiya, Kanagawa, JP;
Mieko Kakegawa, Kanagawa, JP;
Tsuyoshi Imamura, Kanagawa, JP;
Sumio Kamio, Tokyo, JP;
Kyohta Koetsuka, Kanagawa, JP;
Noriyuki Kamiya, Kanagawa, JP;
Mieko Kakegawa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device for developing a latent image formed on an image carrier of the present invention includes a rotatable, nonmagnetic developer carrier, and a magnetic field generating member for generating a magnetic field in a developing zone where the developer carrier faces the image carrier. The magnetic field generated causes a developer deposited on the developer carrier to rise in the form of a magnet brush. A magnetic pole for development is located upstream of a position where the developer carrier and image carrier are closest to each other in a direction of rotation. A magnetic force, as measured on the surface of the developer carrier, increases from the position of the magnetic pole toward a position where the magnet brush finally leaves the image carrier.