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:
Jun. 22, 2010
Filed:
Nov. 10, 2006
Osamu Uchinokura, Mishima, JP;
Fumihiro Sasaki, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Hidetoshi Noda, Kyoto, JP;
Tsuyoshi Fukushima, Kyoto, JP;
Koutaro Kitano, Kyoto, JP;
Osamu Uchinokura, Mishima, JP;
Fumihiro Sasaki, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Hidetoshi Noda, Kyoto, JP;
Tsuyoshi Fukushima, Kyoto, JP;
Koutaro Kitano, Kyoto, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present invention provides a method for producing a toner including preparing an emulsified dispersion which contains emulsion particles by emulsifying or dispersing an oil phase containing at least a pigment and any one of a binder resin and a binder resin precursor in an aqueous medium, and granulating toner base particles by converging the emulsified dispersion, wherein the Casson yield value of the single oil phase before being emulsified or dispersed in the aqueous medium is 0.5 Pa to 20 Pa; and the temperature Tn of the emulsified dispersion in the preparation of the emulsified dispersion, the temperature Ts of the emulsified dispersion in the granulation of the toner base particles, and the glass transition temperature Tg of the toner base particles satisfy the relation Tn<Ts<Tg.