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:
Jun. 06, 1989
Filed:
Mar. 25, 1988
Applicant:
Inventors:
Anders R Axelsson, Sundsvall, SE;
Lolo Bylander, Njurunda, SE;
Sten Porrvik, Sundsvall, SE;
Olof Tanner, Sundsvall, SE;
Assignee:
Casco Nobel AB, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430138 ; 430111 ;
Abstract
A toner and a method for the preparation of toner particles essentially consisting of monodisperse spherical thermoplastic particles having a coefficient of variation below 30 per cent and a mean diameter between 2 and 50 .mu.m, the particles having a shell of polymeric material in which a colorant is distributed. The particles are prepared by treating monodispersed spherical polymerized base particles with a shell-polymer and a colorant and contacted to give a uniform distribution of the additives on the base particles whereafter the shell-polymer is fused to the base particles.