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:
Feb. 20, 1990
Filed:
Dec. 28, 1987
Applicant:
Inventors:
Masumi Koishi, Sagamihara, JP;
Masuyuki Takada, Tokyo, JP;
Akio Kazama, Tokyo, JP;
Yukio Kawashima, Tokyo, JP;
Assignee:
Toyo Ink Mfg, Co., Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
4301066 ; 430108 ;
Abstract
A toner for use in electrophotography comprising thermoplastic resin core particles (A) or colorant-embedded thermoplastic resin core particles (A') each having an average particale size of 1 to 15 .mu.m, a charge-controlling agent (B) and carrier particles (C) having an average particle size of 0.05 to 2.0 .mu.m, the charge-controlling agnet (B) being carried on the carrier particles (C), and the carrier particles (C) with the agent (B) carried thereon being embedded in the surfaces of the resin core particles (A) or the colorant-embedded resin core particles (A').