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. 09, 1997
Filed:
Mar. 31, 1994
Applicant:
Inventors:
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430108 ; 430904 ; 428407 ;
Abstract
A magnetic particle brush developing carrier used for electrostatic latent image developing is disclosed, comprising a magnetic particle having a surface coating comprising two kinds of fluoro-type resins, with one of the resins having a higher critical surface tension than the other. The carrier maintains its triboelectric properties even after extended use, it reaches charge saturation after a short period of triboelectrification, and it has excellent charge stability against environmental change.