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:
Dec. 12, 1995
Filed:
May. 24, 1994
Hajime Yamazaki, Tokyo, JP;
Hiroshi Hamada, Tokyo, JP;
Hiroaki Kataoka, Tokyo, JP;
Shinji Otani, Tokyo, JP;
Hodogaya Chemical Co., Ltd., Tokyo, JP;
Abstract
A process for producing a toner for developing electrostatic image is disclosed which comprises preparing a suspension of a mixed solution of a polymerizable monomer system containing at least a coloring agent and a release agent and an aqueous medium system and polymerizing the suspension, wherein the suspension is prepared by jetting the mixed solution through a nozzle under elevated pressure in a flowing direction which is forced to vary so that the mixed solution collides with each other or with a predetermined plane to prepare suspended grains, and immediately passing the mixed solution through an apparatus for throttling the path so that back pressure and shearing stress produced by the throttling apparatus are used to adjust the grain diameter and grain size distribution of the suspended grains. The process provides a toner having a small grain diameter and a narrow grain size distribution and comprising additives homogeneously dispersed therein.