Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1975-01-02
1976-01-27
Miller, J. D.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
250325, H01T 1900
Patent
active
039355179
ABSTRACT:
Application of a constant density of surface charge on a dielectric medium by non-contact charging is accomplished by a rotatable charging roll having a relaxable layer surrounding a conductive axle and a protective leaky insulator overcoat layer applied to the relaxable layer. The charging roll is spaced from the dielectric medium to define an air gap of about 0.010-0.060 inch and the surface velocity of the charging roll is adjustable relative to the velocity of the moving dielectric medium. A constant current power source is coupled to the conductive axle to generate a charge buildup on the surface of the relaxable layer; part of this charge is transferred across the air gap to the surface of the dielectric medium. A blade or brush is provided to clean the charging roller as it rotates.
REFERENCES:
patent: 3233156 (1966-02-01), Jarvis et al.
patent: 3254215 (1966-05-01), Oliphant
patent: 3716755 (1973-02-01), Marx
patent: 3781105 (1973-12-01), Meagher
Miller J. D.
Moose Jr. Harry E.
Xerox Corporation
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