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. 24, 2012
Filed:
Jul. 09, 2009
Tsuyoshi Itou, Izunokuni, JP;
Takayasu Aoki, Mishima, JP;
Takashi Urabe, Sunto-gun, JP;
Yasuhito Noda, Mishima, JP;
Motonari Udo, Mishima, JP;
Satoshi Araki, Izunokuni, JP;
Masahiro Ikuta, Mishima, JP;
Takafumi Hara, Mishima, JP;
Asumi Matsumoto, Sunto-gun, JP;
Tsuyoshi Itou, Izunokuni, JP;
Takayasu Aoki, Mishima, JP;
Takashi Urabe, Sunto-gun, JP;
Yasuhito Noda, Mishima, JP;
Motonari Udo, Mishima, JP;
Satoshi Araki, Izunokuni, JP;
Masahiro Ikuta, Mishima, JP;
Takafumi Hara, Mishima, JP;
Asumi Matsumoto, Sunto-gun, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
The method for producing a developing agent according to the invention contains subjecting the toner material dispersion liquid to mechanical shearing to make the granular mixture into fine particles, thereby providing a dispersion liquid containing fine particles having a smaller particle diameter than a particle diameter of the granular mixture. The toner material dispersion liquid is subjected to mechanical shearing under a temperature of a glass transition point Tg of the binder resin or more and a pressure of 10 MPa or more, and the resulting dispersion liquid containing the fine particles is depressurized with two or more stages while maintaining the temperature of a glass transition point Tg of the binder resin or more and then cooled to a temperature of a glass transition point Tg of the binder resin or less.