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. 21, 2012
Filed:
Mar. 31, 2009
Masateru Kawamura, Toyoake, JP;
Yasutomo Imai, Toyota, JP;
Masateru Kawamura, Toyoake, JP;
Yasutomo Imai, Toyota, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
The present teaching provides a method for producing a positive charging toner that can exhibit stable charge characteristics. According to the present teaching, a positive charging toner is produced by preparing a base particle suspension having a conductivity not higher than 70 μS/cm and comprising base particles that are obtained by mixing and emulsifying an aqueous medium and a resin solution containing the polyester resin; producing toner base particles by mixing the base particle suspension with a charge control resin microparticle suspension containing charge control resin microparticles; causing the charge control resin microparticles to adhere to the surfaces of the base particles; and washing the toner base particles.