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. 15, 2002
Filed:
Sep. 26, 2000
Masayuki Hagi, Minoo, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Yoshitaka Sekiguchi, Nishinomiya, JP;
Kenichi Kido, Nishinomiya, JP;
Takeshi Arai, Akashi, JP;
Megumi Aoki, Itami, JP;
Tetsuo Sano, Amagasaki, JP;
Junichi Tamaoki, Sakai, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The present invention provides a toner for developing an electrostatic latent image which suppresses an adhesion and wearability on a surface of a photosensitive member and exhibits an excellent rising property of an electrification. The toner comprises (i) toner particles containing a binder resin and a colorant, (ii) a first external additive consisting of first inorganic particles whose number-average particle size is 5-40 nm, (iii) a second external additive consisting of second inorganic particles whose number-average particle size, which is larger than that of the first external additive, is 20-160 nm, (iv) a third external additive consisting of third inorganic particles whose number-average particle size, which is larger than that of the second external additive, is 80-1200 nm, and (v) a fourth external additive consisting of a metal salt of fatty acid whose volume-average particle size is 1.5-12 &mgr;m, said four external additives being externally added to the toner particles.