State detection arrangement for ink jet system printer

Details State detection arrangement for ink jet system printer State detection arrangement for ink jet system printer

1974-03-12

1977-02-08

Hartary, Joseph W.

Recorders

Record receiver deforming

G01D 1800

Patent

active

040074633

ABSTRACT:
An ink jet system printer of the charge amplitude controlling type wherein a charge amplitude on ink drops charged by the application of phase detection signals to a charging electrode is sensed and then the relationship in phase between charging signals and ink drop separation is compensated in a manner to ensure that the ink drops are charged at an optimum state at all times. In the ink jet system there is provided a phase synchronization detection circuit for producing phase synchronization signals only when the phase relation is maintained at an optimum state due to the compensation, and a phase synchronization time period measuring circuit for determining whether the phase synchronization signals occur in sequence during a specified period of time and for producing printing ready signals if an affirmative answer is obtained.

REFERENCES:
patent: 3769632 (1973-10-01), Julisburger et al.

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