Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1986-02-27
1987-10-06
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
106DIG1, 252 6255, 252 6256, 252 6258, 252 6259, 252 6260, 252 6262, 252 6263, 252 6264, 430107, 430108, 430135, 430965, G01G 900, G01G 914, G01G 910, C03G 4908
Patent
active
046982892
ABSTRACT:
A process for making a ferrite spherical particulate toner carrier core from a raw fly ash comprising recovering the magnetic particles from the non-magnetic particles of the raw fly ash; selecting a desired size for the particles of the raw fly ash and screening the fly ash to obtain the desired sized particles; and purifying the resultant raw fly ash to obtain a ferrite composition having a particle size from 20-300 microns, in which the particles are essentially spherical, having an apparent density of at least 1.8 g/cm.sup.3, a saturation magnetization of 43-70 emu/g, a remanence of 5 emu/g or less, a Hall Flow of 20 sec. or greater/50 g.
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Studies of the Constitution of Fly Ash Using Selective Dissolution, U.S. Army Eng., Waterways Experiment Station Report, May 1983, Prep. by Betrelle Memorial Inst., Columbus, Ohio.
Aldrich Robert G.
Earl Geoffrey H.
Trunko David W.
Halomet Inc.
Kittle John E.
Lewen Bert J.
Shah Mukund J.
Sternberg Henry
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