Maintaining Paschen breakdown voltage in electrographic printing

Details Maintaining Paschen breakdown voltage in electrographic printing Maintaining Paschen breakdown voltage in electrographic printing

1979-12-17

1982-11-16

Hecker, Stuart N.

Recorders

Electric recording

Electrochemical

346150, 430 35, 355 14CH, G11B 1560

Patent

active

043597530

ABSTRACT:
In electrographic printing Paschen breakdown must be exceeded for writing to occur, or the Paschen breakdown level can be used as a measure of the suitability of record media for use in such printing. The onset of Paschen breakdown is determined by the appearance or disappearance of second harmonic current flow across a test gap. The DC output of an integrator rises until the onset of Paschen breakdown occurs caused by the combination of the D C output and a sinusoidal voltage from an oscillator.

REFERENCES:
patent: 3179944 (1965-04-01), Dickens
patent: 4139816 (1979-02-01), Sanford
patent: 4297715 (1981-10-01), Tadauchi et al.

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