Sub-harmonic phase control for an ink jet recording system

Details Sub-harmonic phase control for an ink jet recording system Sub-harmonic phase control for an ink jet recording system

1974-12-16

1976-07-13

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 75, G01D 1800

Patent

active

039697339

ABSTRACT:
Sub-harmonic charging and detection of charging phase synchronization in an ink jet system employing electrostatic deflection of individual ink jet droplets. The phase control employs filtration
arrow-band amplification at a sub-harmonic frequency from the normal drop repetition frequency, such that noise and extraneous drop rate machine signals are filtered. Sensing may best be accomplished by an inductive charge sensing element and detection of the filtered sensed signals by integration and by level detection.

REFERENCES:
patent: 3465351 (1969-09-01), Keur et al.
patent: 3761941 (1973-09-01), Robertson
patent: 3769630 (1973-10-01), Hill et al.
patent: 3769632 (1973-10-01), Julisburger
patent: 3836912 (1974-09-01), Ghougasian et al.

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