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:
Jan. 03, 1995
Filed:
Oct. 13, 1992
Reiko Akiyama, Minami-shigara, JP;
Chiaki Suzuki, Minami-shigara, JP;
Atuhiko Eguchi, Minami-shigara, JP;
Takayoshi Aoki, Minami-shigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An electrophotographic dry toner comprising a binder resin and a colorant, having externally added thereto an inorganic compound, preferably spherical silica particles, having been surface treated with at least one treating agent selected from the group consisting of a treating agent selected from a polyethylene, a fatty acid metal salt, and a solid alcohol containing from 20 to 60 carbon atoms. The toner is prepared by treating the inorganic compound with a dispersion or a solution of the treating agent in a solvent and adding the thus surface-treated inorganic compound to a toner. The toner exhibits satisfactory fluidity, satisfactory cleanability, excellent environmental stability, and excellent durability and causes no toner filming phenomenon on a photoreceptor, a carrier used in a two-component developer system, or a charging part used in a one-component developer system.