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. 26, 2019
Filed:
May. 23, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyo Miyakai, Kashiwa, JP;
Junichi Tamura, Toride, JP;
Hayato Ida, Toride, JP;
Takaho Shibata, Tokyo, JP;
Kouichirou Ochi, Chiba, JP;
Yuya Chimoto, Funabashi, JP;
Ryuji Murayama, Nagareyama, JP;
Daisuke Yamashita, Tokyo, JP;
Akemi Watanabe, Hiratsuka, JP;
Takashi Hirasa, Moriya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm)or more and 21.0 (J/cm)or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.