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:
Nov. 12, 2002
Filed:
Apr. 26, 2002
Chiaki Suzuki, Minamiashigara, JP;
Masahiro Takagi, Minamiashigara, JP;
Satoshi Inoue, Minamiashigara, JP;
Yosuke Tsurumi, Minamiashigara, JP;
Kozo Ota, Minamiashigara, JP;
Sakon Takahashi, Minamiashigara, JP;
Tomohito Nakajima, Minamiashigara, JP;
Atsuhiko Eguchi, Minamiashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A toner for developing an electrostatic latent image, a process for producing the same, and a developer for developing an electrostatic latent image using the same are provided, in which the toner flowability, the charging property, the developing property, the transferring property and the fixing property are simultaneously satisfied in a long period of time. The toner for developing an electrostatic latent image comprising a colored particles containing a binder resin, a coloring agent and a releasing agent, and an external additive, the external additive containing a monodisperse spherical inorganic oxide having a true specific gravity of from 1.3 to 1.9 and a volume average particle diameter of from 80 to 300 nm. It is preferred that the inorganic oxide is silica, the colored particles have a shape coefficient of 125 or less, and the external additive further contains a reaction product of metatitanic acid and a coupling agent, which has an electric resistance of 10 &OHgr;·cm or more.