Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2005-09-16
2008-10-28
Goodrow, John L (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S137200
Reexamination Certificate
active
07442482
ABSTRACT:
A process for preparing a toner including the steps of (I) melt-kneading a raw material mixture containing a resin binder, a wax, and a colorant with an open-roller type kneader; (II) cooling the melt-kneaded mixture obtained in the step (I) and pulverizing the cooled mixture; and (III) classifying the pulverized product obtained in the step (II) to give a toner, wherein the wax is contained in the toner in an amount of from 2 to 15% by weight, and has a number-average particle size in the toner of 1 μm or less, wherein the toner has a volume-median particle size (D50) of from 3.5 to 7 μm, and a standard deviation in volume base particle size distribution of ¼ of D50or less, and contains 5% by volume or less of particles having particle sizes of (1.4×D50) μm or more, and 5% by number or less of particles having particle sizes of 3 μm or less. The toner can be used, for instance, for the development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
REFERENCES:
patent: 6171744 (2001-01-01), Nakazawa et al.
patent: 6326119 (2001-12-01), Hollenbaugh et al.
patent: 7078144 (2006-07-01), Ota et al.
patent: 2005/0233236 (2005-10-01), Eida et al.
patent: 2005/0233237 (2005-10-01), Eida et al.
patent: 2005/0233238 (2005-10-01), Eida et al.
Patent Abstracts of Japan, JP 2002-365847A, Dec. 18, 2002.
Patent Abstracts of Japan, JP 2003-076056A, Mar. 14, 2003.
U.S. Appl. No. 11/228,259, filed Sep. 19, 2005, Eida.
U.S. Appl. No. 11/423,792, filed Jun. 13, 2006, Eida, et al.
Goodrow John L
Kao Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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