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:
Jul. 12, 1994
Filed:
Mar. 29, 1990
Jiro Yamashiro, Kobe, JP;
Harushi Nagami, Kobe, JP;
Takashi Miki, Kobe, JP;
Mitsuhiro Uchino, Kobe, JP;
Bando Chemical Industries, Ltd., Kobe, JP;
Abstract
There is disclosed a method of producing a toner particles for use in electrophotography which comprises: suspending a radical polymerizable monomer which contains a colorant and a charge controlling agent therein in an aqueous phase; suspension polymerizing the monomer to provide spherical polymer particles of 1-30 .mu.m in diameter; treating the suspension containing the polymer particles with a continuous, wet type, agitation mill, to deform the polymer particles. A further method of producing toner particles is disclosed which comprises: producing spherical polymer particles by suspension polymerization of a monomer; making finely divided triboelectric or electroconductive particles or both onto the surface of the polymer particles; and then mechanically pressing the polymer particles to deform the polymer particles as well as to fix the particles on the surface of the polymer particles. A still further method of producing toner particles is disclosed which comprises: producing spherical polymer particles of 20-300 .mu.m in diameter by suspension polymerization of a monomer; and then crushing and classifying the polymer particles into toners of 1-30 .mu.m in size preferably after deforming the polymer particles.