Low charge-voltage frost recording on a photosensitive thermopla

Details Low charge-voltage frost recording on a photosensitive thermopla Low charge-voltage frost recording on a photosensitive thermopla

1975-12-01

1978-03-07

Thurlow, Jeffery R.

Gas separation: apparatus

Magnetic separating means

96 13, 264 22, 355 9, G03G 1600

Patent

active

040778037

ABSTRACT:
A method and apparatus are provided for achieving substantially uniform charging of a single layer thermoplastic recording surface in either a positive or negative sense to a potential just below the frost threshold level, for exposing the thermoplastic surface to light in image configuration, and for applying a heat pulse to the thermoplastic surface for a time relatively short compared to the duration of the light exposure interval and during that exposure. The charging event is arranged so that the thermoplastic surface is raised only to a relatively low potential with respect to ground. More specifically, the consequent surface charge density on the thermoplastic surface is of a low enough magnitude that no frost is produced when the medium is cycled without exposure to light; furthermore, the quality of the recording is relatively insensitive to layer thickness.

REFERENCES:
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patent: 3258336 (1966-06-01), Ewing
patent: 3317316 (1967-05-01), Bean et al.
patent: 3333958 (1967-08-01), Giaimo, Jr.
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patent: 3436216 (1969-04-01), Urbach
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patent: 3445226 (1969-05-01), Gundlach et al.
patent: 3547628 (1970-12-01), Wolff
patent: 3672883 (1972-06-01), Ciccarelli et al.
patent: 3719483 (1973-03-01), Bean
Encyclopedia of Chemical Technology, Kirk-Ot mer, vol. 15, 6-1969-"Phthalocyanine Compounds," p. 489.

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