Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1976-04-05
1980-09-16
Martin, Jr., Roland E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
148 635, 148105, 427216, 428403, G03G 914, G03G 910
Patent
active
042230853
ABSTRACT:
Magnetically-responsive electrostatographic nickel carrier particles having semi-conductive and lower triboelectric charging properties are prepared by heat treating nickel particles in an ambient atmosphere as to provide the carrier particles with an oxide coating. More particularly, commercially available nickel particles are placed in a furnace and the particles are heat treated at a temperature of between about 600.degree. C. and about 1,000.degree. C. for a period of time of between about 5 and 10 minutes. When employed with finely-divided toner particles to develop electrostatic latent images in a magnetic-brush development apparatus, the treated carriers have been found to alleviate shorting problems and to provide developed images having lower background densities and higher resolution than prior carrier materials.
REFERENCES:
patent: 3632512 (1972-01-01), Miller
patent: 3679398 (1972-07-01), Geus
patent: 3767477 (1973-10-01), McCabe et al.
patent: 3767578 (1973-10-01), Hagenbach et al.
patent: 3849182 (1974-11-01), Hagenbach
patent: 4018601 (1971-11-01), Hagenbach
Di Orazio Dennis F.
Forgensi Rudolph
Hagenbach Robert J.
Volkers Stewart W.
Frenkel Stuart D.
Martin Jr. Roland E.
Xerox Corporation
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