Electrostatic development

Details Electrostatic development Electrostatic development

1973-10-26

1977-04-26

Klein, David

Gas separation: apparatus

Magnetic separating means

252 621R, G03G 902, G03G 1308

Patent

active

040199037

ABSTRACT:
Electrostatographic developer comprised of a toner and an uncoated carrier wherein the carrier is a Group IV metal oxide or a double oxide of tin, hafnium, germanium, zirconium, or titanium and an alkaline earth or lead. These carriers have the desirable properties generally associated with the coated carriers heretofore employed in the art, but are not as prone as the coated carriers to degradation and impactation and therefore have a longer useful life.

REFERENCES:
patent: 2618552 (1952-11-01), Wise
patent: 3272644 (1966-09-01), Nelson
patent: 3545968 (1970-12-01), Sato
patent: 3591503 (1971-07-01), Hagenbach et al.
patent: 3713819 (1973-01-01), Hagenbach et al.
patent: 3767578 (1973-10-01), Hagenbach et al.

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