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. 14, 2009
Filed:
May. 16, 2005
Yasuhito Yuasa, Osaka, JP;
Hidekazu Arase, Hyogo, JP;
Mamoru Soga, Osaka, JP;
Masahisa Maeda, Osaka, JP;
Yasuhito Yuasa, Osaka, JP;
Hidekazu Arase, Hyogo, JP;
Mamoru Soga, Osaka, JP;
Masahisa Maeda, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Toner of the present invention is produced by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispersion in which wax particles are dispersed and heating and aggregating the mixed dispersion. The main component of a surface-active agent used for the resin particle dispersion is a nonionic surface-active agent. The main component of at least one surface-active agent selected from a surface-active agent used for the wax particle dispersion and a surface-active agent used for the colorant particle dispersion is a nonionic surface-active agent. With this configuration, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process. The toner and a two-component developer can achieve oilless fixing, eliminate spent of the toner components on a carrier to make the life longer, and ensure high transfer efficiency by suppressing transfer voids or scattering during transfer.