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:
Aug. 12, 2003
Ichiro Kadota, Tokyo, JP;
Takashi Hodoshima, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Teiichiro Takano, Tokyo, JP;
Ichiro Kadota, Tokyo, JP;
Takashi Hodoshima, Kanagawa, JP;
Nobutaka Takeuchi, Kanagawa, JP;
Teiichiro Takano, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing method of the present invention uses a sleeve accommodating a stationary magnet roller formed with a plurality of magnetic poles and facing an image carrier. The sleeve is rotated to convey a developer, which is made up of toner grains and magnetic carrier grains and deposited on the sleeve, to a developing zone for thereby feeding the toner grains from a magnet brush formed by the developer to a latent image formed on the image carrier. When the developing zone is seen from the image carrier side, the ratio of the total area of voids present at the tips of the magnet brush to the total area of the developing zone is selected to be 25% or less.