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. 08, 2016
Filed:
Feb. 25, 2014
Morimura Chemicals Limited, Kanagawa, JP;
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Koichi Tsunemi, Koza-gun, JP;
Toshihiko Oguchi, Koza-gun, JP;
Atsushi Suka, Koza-gun, JP;
Takashi Iimura, Koza-gun, JP;
Kazuyuki Matsumura, Annaka, JP;
Muneo Kudo, Annaka, JP;
Masaki Tanaka, Tokyo, JP;
Yoshiteru Sakatsume, Tokyo, JP;
MORIMURA CHEMICALS LIMITED, Kanagawa, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
There is provided an electrostatic image developing toner less likely to cause image degradation even when used for a long period, by controlling CCA particles present on surfaces of toner particles and thereby keeping an amount of tribocharge generated between the toner and a magnetic carrier or the like constant. A charge control agent composition for external addition for controlling charge amount of toner particles includes: at least two types of carrier particles different in average particle size of primary particles; and a charge control agent (CCA), and an electrostatic image developing toner is constituted of a mixture of toner particles and the aforesaid charge control agent composition for external addition.