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:
Apr. 01, 2014
Filed:
Sep. 03, 2010
Sakon Takahashi, Kanagawa, JP;
Motoko Sakai, Kanagawa, JP;
Yutaka Saito, Kanagawa, JP;
Katsuyuki Kitajima, Kanagawa, JP;
Sakon Takahashi, Kanagawa, JP;
Motoko Sakai, Kanagawa, JP;
Yutaka Saito, Kanagawa, JP;
Katsuyuki Kitajima, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A two-component developer includes: a toner; a carrier having a surface energy of from about 23 dyne/cm to about 37 dyne/cm; and an external additive having a shape factor SF1 of from about 130 to about 150 and a number-average particle diameter of from about 80 nm to about 1 μm; and an existence ratio A of the external additive on a surface of the toner and an existence ratio B of the external additive on a surface of the carrier satisfying the relationship of the following Expression 1: 0.04≦B/A≦0.4.