Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2006-10-10
2006-10-10
RoDee, Christopher (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S110200, C430S109400
Reexamination Certificate
active
07118841
ABSTRACT:
The present invention is to provide a toner for developing an electrostatic image, having good fixing property and shelf stability, as well as having a good transferring property without decreasing its printing concentration nor generating a fog, even where it is subjected to a printing condition exposed under various circumstances and for an extended period. The toner of the present invention comprises a colored particle including a rosin ester having an acid value of 2 or less; and an external additive. The rosin ester used in the present invention is an electrification compound of a rosin compound with a polyalcohol. The electrification compound of the rosin ester may be reacted with an epoxy compound. The colored particle has a core-shell structure. The colored particle further comprises a binder resin, a colorant, a charge control agent, a parting agent in the core, and a magnetic material in the core.
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Diamond, Arthur S. (ed.) Handbook of Imaging Materials. New York: Marcel-Dekker, Inc. (1991) pp. 168, 169, 196.
Armstrong Kratz Quintos Hanson & Brooks, LLP
RoDee Christopher
Zeon Corporation
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