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:
Nov. 09, 2021
Filed:
Dec. 27, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shohei Kototani, Suntou-gun, JP;
Kentaro Yamawaki, Mishima, JP;
Tsuneyoshi Tominaga, Suntou-gun, JP;
Masatake Tanaka, Yokohama, JP;
Taiji Katsura, Suntou-gun, JP;
Masamichi Sato, Mishima, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner including a toner particle containing a binder resin, and an external additive, wherein the external additive contains an organosilicon polymer fine particle, the organosilicon polymer has a structure represented by at least one selected from the group consisting of RSiOand RSiO(wherein Rand Rrepresent organic groups), and in the number particle size distribution of the toner as measured within a particle size range of from 2 to 60 μm, the number-average particle diameter T-Dat which the accumulation from the smallest diameter is 50% is from 6 to 12 μm, the number ratio of toner 4 μm or less in size is from 2% to 5% of the total toner, and the number ratio of toner 3 μm or less in size as a percentage of the total toner 4 μm or less in size is from 25% to 50%.