Phase synchronization for ink jet system printer

Details Phase synchronization for ink jet system printer Phase synchronization for ink jet system printer

1975-03-28

1977-05-24

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 75, G01D 1800

Patent

active

040259269

ABSTRACT:
In ink jet system printers of the charge amplitude controlling type, it is required, to ensure stable printing, that ink drop separation (drop formation) is timed to be in agreement with the application of charging signals. To this end, there are provided phase detecting signals having a period which is an integral multiple of the period of the exciting signals for the ultra-sonic vibrator attached to a jet nozzle, and which phase detecting signals are of opposite polarity to the charging signals. Moreover, in the printing operation, there are provided phase detecting ink drops which are charged by the phase detecting signals, in addition to printing ink drops. After the charge amplitude on the phase detecting drops is sensed, the phase detecting signals are controlled in a manner that the charge amplitude on the phase detecting drops takes the maximum value at all times. The phases of the charging signals are also controlled in a manner to enable the application thereof to the generated ink drops in the optimum phase relation.

REFERENCES:
patent: 3596276 (1971-07-01), Lovelady
patent: 3750191 (1973-07-01), Naylor
patent: 3769630 (1973-10-01), Hill et al.
patent: 3769632 (1973-10-01), Julisburger et al.
patent: 3866237 (1975-02-01), Meier

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