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. 02, 2021
Filed:
Aug. 06, 2019
Fuji Xerox Co., Ltd., Tokyo, JP;
Daisuke Ishizuka, Kanagawa, JP;
Narumasa Sato, Kanagawa, JP;
Yuka Kawamoto, Kanagawa, JP;
Erina Saito, Kanagawa, JP;
Norimasa Ozora, Kanagawa, JP;
Kotaro Yoshihara, Kanagawa, JP;
Noriyuki Mizutani, Kanagawa, JP;
FUJI XEROX CO., LTD., Tokyo, JP;
Abstract
A toner for developing an electrostatic charge image includes toner particles containing a binder resin; and an external additive containing silica particles, in which a coefficient of variation of a Si content is determined by determining the Si content in 0.5 μm×0.5 μm square regions in a surface of each of the toner particles after performing a process of dispersing the toner in water and drying the dispersed toner, and an amount of change between this coefficient of variation of the Si content and a coefficient of variation of a Si content before the process ((coefficient of variation of Si content after process)−(coefficient of variation of Si content before process)) is 0.05 or more and 0.60 or less.