Biasing arrangement for a corona discharge device

Details Biasing arrangement for a corona discharge device Biasing arrangement for a corona discharge device

H - Electricity

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H01T 19/00 (2006.01) A01K 79/02 (2006.01) A61N 1/14 (2006.01) B65H 29/60 (2006.01) B65H 31/00 (2006.01) B65H 39/115 (2006.01) G03G 15/00 (2006.01) G03G 15/02 (2006.01) G03G 21/00 (2006.01) G11B 15/66 (2006.01) H03K 3/53 (2006.01)

Patent

CA 1051087

ABSTRACT OF THE DISCLOSURE A biasing arrangement for a corona discharge device including a conductive shield partially surrounding a corona electrode comprising means for applying a first high D.C. potential to the wire and a second high D.C. potential to the shield, the potential difference between the wire and the shield being sufficiently small to substantially inhibit corona current. A high voltage pulse train is superimposed on the shield which periodically increases the potential difference between the wire and the shield to foster ion generation adjacent the wire. Between pulses, the shield is returned to the second potential to again inhibit further ion generation while concurrently permitting ion movement toward a surface to be charged rather than toward the shield itself. Pulse duration and repetition rate are selected to enhance the efficiency of the corona device.

241893

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