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. 14, 2020
Filed:
Dec. 04, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Nozomu Komatsu, Toride, JP;
Masayuki Hama, Toride, JP;
Takeshi Hashimoto, Moriya, JP;
Ichiro Kanno, Kashiwa, JP;
Yuto Onozaki, Saitama, JP;
Megumi Ikeda, Kashiwa, JP;
Akifumi Matsubara, Narashino, JP;
Hitoshi Sano, Matsudo, JP;
Takakuni Kobori, Toride, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner having chargeability and fluidity that do not change to a great extent is provided. The toner includes toner particles containing a binder resin and includes inorganic fine particles A, wherein the shape factor SF-2 of primary particles of the inorganic fine particles A is 116 or less, and regarding the particle size distribution on a volume basis of the inorganic fine particles A on the toner particle surfaces, the particle diameter when a cumulative value from the small particle side reaches 16% by volume is denoted as D16, the particle diameter when a cumulative value reaches 50% by volume is denoted as D50, and the particle diameter when a cumulative value reaches 84% by volume is denoted as D84, D50 is 80 nm or more and 200 nm or less, and the particle size distribution indicator A represented by D84/D16 is 1.70 or more and 2.60 or less.