Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1987-07-27
1989-09-19
Welsh, J. David
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430111, 430137, 427218, 427221, 264 13, G03G 910
Patent
active
048680834
ABSTRACT:
A process for producing a developer carrier is disclosed, which comprises heating a carrier composition containing a resin, magnetic particles and a compound having a lower critical surface energy than the resin, to produce a carrier particle having a higher surface concentration of the compound having a lower critical surface energy. A developer carrier having an average particle size of at least about 50 .mu.m and containing a fluorine-containing compound and fine magnetic particles dispersed in a binder resin is also disclosed. The developer carriers according to the invention when used in magnetic brush development provide superior charge generation, extended life and improved image reproduction.
REFERENCES:
patent: 3873355 (1975-03-01), Queener et al.
patent: 3961106 (1976-06-01), Heytmeijer
patent: 4218530 (1980-08-01), Lu
patent: 4248954 (1981-02-01), Datta
patent: 4434220 (1984-02-01), Abbott et al.
Aoki Takayoshi
Matsumura Yasuo
Nagatsuka Ikutaroh
Suzuki Chiaki
Takeda Masayuki
Fuji 'Xerox Co., Ltd.
Welsh J. David
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