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:
Apr. 29, 2003
Filed:
Sep. 26, 2001
Hiroyoshi Okuno, Minamiashigara, JP;
Akira Matsumoto, Minamiashigara, JP;
Tsutomu Kubo, Minamiashigara, JP;
Teigen Lee, Minamiashigara, JP;
Yuusaku Shibuya, Minamiashigara, JP;
Yutaka Sugizaki, Minamiashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A toner for developing an electronic latent image, including toner particles containing a binder resin and a colorant, and an external additive, is provided. The external additive contains silica formed by a sol-gel method of which the surface is subjected to hydrophobic treatment and which has an average primary particle size of 80 to 300 nm, a water content of 3 to 15% and a volume resistivity of 1×10 &OHgr;cm or more. The invention further provides an image forming method and an image forming apparatus using the same. The toner for developing an electrostatic latent image is good in transferability over a long period of time and gives a high image quality without causing an image defect.