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. 16, 1999
Filed:
May. 19, 1998
Shuji Sato, Sagamihara, JP;
Yasuo Matsumura, Odawara, JP;
Manabu Serizawa, Odawara, JP;
Masaaki Suwabe, Odawara, JP;
Yasuo Kadokura, Odawara, JP;
Hisao Morijiri, Odawara, JP;
Takeshi Shouji, Minamiashigara, JP;
Takahiro Mizukuchi, Minamiashigarashi, JP;
Junichi Tomonaga, Odawara, JP;
Kouichi Sugiyama, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The toner for developing an electrostatic charge image has a sharp particle size distribution, an improved cleaning property even if the toner has small particle diameter, and a stable charging property, developing property and transfer property regardless of change of environment. By use of the toner, a highly precise image may be obtained. In a toner for developing an electrostatic charge image prepared by a wet process, the dielectric loss factor of the toner particles is 100 or less. In addition, when the toner particles are dissolved in an organic solvent and mixed with deionized water, the electrical conductance of the solution is desirably 100 ms or less and the surface tension thereof is desirably 20 mN or more. The toner may be obtained by forming agglomerated particles with stirring in a dispersion in which resin particles are dispersed to granulate; heating the toner particles to Tg or higher of the binder resin; stirring; and cleaning. With a wet process, the added stabilizing agent such as a surfactant can be removed.