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:
Mar. 17, 2015
Filed:
Dec. 26, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Shintaro Kawaguchi, Yokohama, JP;
Katsuyuki Nonaka, Mishima, JP;
Koji Abe, Numazu, JP;
Naoya Isono, Suntou-gun, JP;
Yuhei Terui, Numazu, JP;
Taiji Katsura, Suntou-gun, JP;
Akira Sugiyama, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner having good development durability, storage stability, environmental stability, and low-temperature fixability is provided. The toner contains toner particles each including a surface layer that contains an organic silicon polymer. The organic silicon polymer contains a unit having a specific structure. The average thickness Dav. of the surface layers is a specific value and the silicon concentration determined by ESCA is 2.5% or more. The toner has a shape factor SF-2 of 140 or more and 260 or less and an average circularity of 0.970 or more and 0.990 or less.