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:
Mar. 28, 2006
Filed:
Dec. 29, 2003
Shigekazu Enoki, Kawasaki, JP;
Osamu Ariizumi, Yokohama, JP;
Hisao Kurosu, Yokohama, JP;
Shinichi Namekata, Yokohama, JP;
Shigekazu Enoki, Kawasaki, JP;
Osamu Ariizumi, Yokohama, JP;
Hisao Kurosu, Yokohama, JP;
Shinichi Namekata, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A two-component developer including toner and magnetic carriers is provided. The two-component developer is characterized in that when a development device including a developer bearing member bearing the two-component developer is operated under a development condition of an image forming apparatus using a quasi-photoconductor in which a 10 μm thick layer of tetrafluoroethylene resin is provided to a conductive material, the number of times of light emission occurring in a magnetic brush formed on the developer bearing member due to partial conduction in the magnetic brush is 10 times or less per second at an observation cross section that is perpendicular relative to a rotation axis of the developer bearing member.