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:
May. 27, 2003
Filed:
Feb. 26, 2001
Applicant:
Inventors:
Akiko Oikawa, Hitachi, JP;
Akira Shimada, Hitachi, JP;
Toru Miyasaka, Hitachi, JP;
Masahiko Saito, Kitaibaraki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/087 ; G03G 9/097 ;
U.S. Cl.
CPC ...
G03G 9/087 ; G03G 9/097 ;
Abstract
A toner for use in a color electrophotographic system ensures a sufficient offset resistance without oil being supplied, and meets requirements for color development, transparency and durability to withstand commercial use. The toner for an electrophotographic system has a resin consisting of two or more resin mixtures having a different degree of crosslinking, the overall occupancy rate of mold releasing agent present as a domain in one particle of the toner is 1 to 10%, and the average dispersion diameter of the mold releasing agent is 10 to 50% of the toner particle diameter.