Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Reexamination Certificate
2006-03-09
2009-12-22
Huff, Mark F (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
Reexamination Certificate
active
07635550
ABSTRACT:
A method of producing a liquid developer which comprises an insulation liquid and toner particles dispersed in the solution is provided. The method comprises the steps of: preparing a kneaded material containing a coloring agent and a resin material; dispersing the kneaded material into an insulation liquid to obtain a molten state kneaded material dispersed liquid in which the kneaded material in a molten state is finely dispersed; and cooling the molten state kneaded material dispersed liquid to solidify the molten state kneaded material; wherein the insulation liquid contains as its major component an unsaturated fatty acid. According to the method, it is possible to provide a liquid developer in which toner particles having a small particle size distribution and a uniform shape are dispersed so that properties of each component of the toner particles can be exhibited sufficiently. The liquid developer mentioned above is also harmless to environment.
REFERENCES:
patent: 3857549 (1974-12-01), Snelling
patent: 5308734 (1994-05-01), Sacripante et al.
patent: 5780196 (1998-07-01), Fujiwara et al.
patent: 07-234551 (1995-09-01), None
patent: 2000-19787 (2000-01-01), None
English translation of abstract of JP 2000-19787 A, published Jan. 2000.
Hogan & Hartson LLP
Huff Mark F
Seiko Epson Corporation
Vajda Peter L
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