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:
Sep. 07, 2021
Filed:
Mar. 04, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprising: a toner particle; and an external additive, wherein the external additive includes spherical silica particles and hydrotalcite particles, a number average particle diameter Da of the spherical silica particles is from 10 nm to 40 nm, a circularity of the spherical silica particles is at least 0.80, and the toner satisfies formula (1) below:{×(1−/100)}/{×(1−/100)}≥0.050  (1)wherein Ga: a content of the spherical silica particles with respect to 100 parts by mass of the toner particle; Gb: a content of the hydrotalcite particles with respect to 100 parts by mass of the toner particle; Ka: a fixing ratio (%) of the spherical silica particles on a surface of the toner particle; and Kb: a fixing ratio (%) of the hydrotalcite particles on the surface of the toner particle.