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. 06, 2011
Filed:
Feb. 25, 2008
Masayoshi Nakayama, Tokyo, JP;
Yoshitaka Fujinuma, Toyko, JP;
Susumu Tateyama, Tokyo, JP;
Tatsuya Kubo, Tokyo, JP;
Masayoshi Nakayama, Tokyo, JP;
Yoshitaka Fujinuma, Toyko, JP;
Susumu Tateyama, Tokyo, JP;
Tatsuya Kubo, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device is disclosed. The developing device includes a developing roller disposed to face an image carrier and a toner carrier capturing roller disposed to face the developing roller for capturing toner carriers adhered onto the image carrier. The developing roller generates a magnetic pole at a side facing the toner carrier capturing roller. A first virtual line, which connects a rotational center of the developing roller to a rotational center of the toner carrier capturing roller, passes through a region between a position where a magnetic flux density of the magnetic pole in the normal line direction is minimum on the developing roller at the upstream side in the rotational direction of the developing roller and a position where the magnetic flux density of the magnetic pole in the normal line direction is maximum on the developing roller.