Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1994-10-03
1996-02-20
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
366276, C09D 1110, B01F 1100
Patent
active
054927889
ABSTRACT:
System and process for replenishing liquid developer in equipment, such as a printer, whereby the percent of toner solids is maintained at about 0.5 to 4% by weight based on the total weight of liquid developer, the system comprising at least one liquid toner concentrate vessel containing aggregates of thermoplastic resin particles, median particle size (volume weighted) greater than 15 .mu.m, and with 90% of the particles (volume weighted) not less than 30 .mu.m, composed of 50 to 100% by weight of particles and 0 to 50% by weight carrier liquid; a liquid vessel containing carrier liquid, means communicating each of said vessels with a dispersing vessel containing electric field means for breaking apart agglomerates of liquid toner, wherein contents of the liquid toner concentrate vessel and the liquid vessel are supplied thereto and the resin particles are dispersed in the carrier liquid to form particles having a median particle size (volume weighted) of less than 15 .mu.m, and with 90% of the particles (volume weighted) less than 30 .mu.m in an amount of about 0.5 to 20% by weight of resin particles and about 99.5 to 805 by weight carrier liquid the dispersion being supplied and metered into the supply vessel containing original liquid developer to maintain the desired weight of solids. The system is useful in copying, proofing and ets., and the liquid developer is useful for making copied, proofs, lithographic printing plates and resists.
REFERENCES:
patent: 4707112 (1987-11-01), Hartmann
patent: 4869847 (1989-09-01), Leslie et al.
patent: 5004165 (1991-04-01), Landa et al.
patent: 5048762 (1991-09-01), Landa et al.
patent: 5078504 (1992-01-01), Landa et al.
Denton Gary A.
Levy Michael J.
Bean II Lloyd F.
Goodrow John
Xerox Corporation
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