Photoelectrophoretic imaging process employing dark charge injec

Details Photoelectrophoretic imaging process employing dark charge injec Photoelectrophoretic imaging process employing dark charge injec

1974-10-21

1976-07-06

Klein, David

Gas separation: apparatus

Magnetic separating means

96 12, 104181, G03G 1704

Patent

active

039679608

ABSTRACT:
An improved photoelectrophoretic imaging method is disclosed wherein the imaging suspension is brought into contact under a first electrical field with a blocking layer having a coating which interacts, in the dark, with the pigment particles of the imaging suspension so as to provide a uniformly charged imaging suspension. The imaging suspension is then exposed to appropriate electromagnetic radiation while under a second electrical field. A second blocking layer, free of said coating is employed to produce positive and negative images.

REFERENCES:
patent: 3511651 (1970-05-01), Rosenberg
patent: 3535221 (1970-10-01), Tulagin
patent: 3595771 (1971-07-01), Weigl
patent: 3620948 (1971-11-01), Walsh
patent: 3676313 (1972-07-01), Ciccarelli
patent: 3689399 (1972-09-01), Ota
patent: 3689400 (1972-09-01), Ota et al.
patent: 3767392 (1973-10-01), Ota
patent: 3804620 (1974-04-01), Wells
patent: 3850627 (1974-11-01), Wells et al.

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