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:
Jan. 21, 1992
Filed:
Nov. 26, 1990
Applicant:
Inventors:
Shigeaki Tasaka, Yamatokoriyama, JP;
Nobuhiko Nakano, Yamatokoriyama, JP;
Kazuya Maeda, Yao, JP;
Toshihisa Ishida, Nara, JP;
Yoshiaki Takahashi, Ikoma, JP;
Tadashi Nakamura, Nara, JP;
Satoshi Yamaue, Nara, JP;
Kumiko Nakamura, Sakurai, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430137 ; 430110 ; 430111 ; 430120 ;
Abstract
A set of electrophotographic toners used for electrophotographic machines are disclosed which comprise an initial supply toner and a supplementary toner, both of which are composed of toner powder and additives adhering to the surface of the toner powder, wherein the weight ratio x of additives to toner powder in the initial supply toner is set to be greater than the weight ratio y of additives to toner powder in the supplementary toner.