Method for two-color development of a xerographic charge pattern

Details Method for two-color development of a xerographic charge pattern Method for two-color development of a xerographic charge pattern

1976-11-26

1978-03-14

Klein, David

Gas separation: apparatus

Magnetic separating means

427 19, G03G 1301

Patent

active

040789292

ABSTRACT:
A charge pattern of a single polarity and having at least three different levels of potential is developed in two colors by utilizing relatively negatively charged toner particles of one color and relatively positively charged toner particles of a second color.

REFERENCES:
patent: 2777418 (1957-01-01), Gundlach
patent: 2784109 (1957-03-01), Walkup
patent: 2879397 (1959-03-01), Lehmann
patent: 2890968 (1959-06-01), Giaimo
patent: 3013890 (1961-12-01), Bixby
patent: 3045644 (1962-07-01), Schwertz
patent: 3094429 (1963-06-01), Howell
patent: 3702483 (1972-11-01), Fantuzzo
patent: 3854043 (1974-12-01), Hukase et al.
patent: 4039831 (1977-08-01), Lehmann
Schaffert, Electrophotography, 1965, pp. 153-159.

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