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. 09, 2001
Filed:
Feb. 29, 2000
Hiroshi Nakazawa, Minamiashigara, JP;
Jun Igarashi, Minamiashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
Provided are a toner for electrophotography, a method for producing it, and a method of image formation with it. The toner fuses little in the apparatus where it is produced, and its productivity is high. The toner has good characteristics including charging characteristics and coloring characteristics, and the amount of coarse grains in the toner is small. The method for producing the toner includes a step of kneading at least a toner-forming material to prepare a kneaded mixture, a step of grinding and classifying at least the kneaded mixture to prepare toner grains, and a step of mixing at least an external additive in the toner grains. In the method, an inorganic oxide containing the same metal element at least for its core is added to the system in all of the kneading step, the grinding and classifying step and the external additive-mixing step.