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:
Apr. 22, 2014
Filed:
Sep. 16, 2011
Kohsuke Satoh, Shizuoka, JP;
Tetsuya Tanaka, Shizuoka, JP;
Masahiro Kawamoto, Shizuoka, JP;
Natsuko Matsushita, Shizuoka, JP;
Kohsuke Satoh, Shizuoka, JP;
Tetsuya Tanaka, Shizuoka, JP;
Masahiro Kawamoto, Shizuoka, JP;
Natsuko Matsushita, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method of manufacturing toner including mixing mother toner particles containing a binder resin and a coloring agent and first particles having an average primary particle diameter of from 100 nm to 1 μm to using a mixer including a rotary shaft member, multiple stirring members provided to the surface of the shaft member, and a casing to cover the multiple stirring members, wherein the cross section of the inner periphery of the casing relative to a direction perpendicular to the rotation axis of the shaft member is circular around the rotation axis with a substantially constant distance between the inner periphery and the rotation axis. The casing covers the multiple stirring members and a cooling jacket is provided to at least part of the outer periphery of the casing. The weight ratio of the particles to the mother toner particles is from 1.5% to 10%.