Treatment of electrophotographic toner compositions

Details Treatment of electrophotographic toner compositions Treatment of electrophotographic toner compositions

1974-11-26

1977-10-04

Lutter, Frank W.

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

106309, 210 43, B03B 100, B03D 306

Patent

active

040522989

ABSTRACT:
Electrophotographic toner compositions, particularly concentrates, are emulsified in water; then subject to pigment and associated charged body material extraction by a mineral spirit liquid which is rich in charge control agent; after which separation the emulsified composition and the extracted pigment material are individually recovered for re-use or other desired disposition.

REFERENCES:
patent: 932548 (1909-08-01), Hopkins
patent: 1585755 (1926-05-01), Borcherdt
patent: 1819462 (1931-08-01), Grossman
patent: 2271324 (1942-11-01), Yee
patent: 2403143 (1946-07-01), Tuit
patent: 2982635 (1961-05-01), Dille
patent: 3432030 (1969-03-01), Olivier
patent: 3712824 (1973-11-01), Kiyokowa

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