Charge timing evaluation in an ink jet system printer of the cha

Details Charge timing evaluation in an ink jet system printer of the cha Charge timing evaluation in an ink jet system printer of the cha

1980-02-26

1982-05-11

Hix, L. T.

Recorders

Record receiver deforming

G01D 1800

Patent

active

043296955

ABSTRACT:
In an ink jet system printer of the charge amplitude controlling type, an electric current flows through an ink droplet issuance unit to ink liquid when an ink droplet is properly charged by a charging tunnel. A detection circuit is connected to the ink droplet issuance unit for detecting the electric current flowing through the ink droplet issuance unit, a determination output of the detection circuit being used for the phase synchronization purposes. A search pulse comprises a first group of search pulse of a predetermined phase and a second group of search pulse of another phase deviated from the predetermined phase. These two groups are alternatingly applied to the charging tunnel at a given selection frequency. If the application of either one group of the search pulse is timed in agreement with the droplet separation phase, an alternating current of a frequency corresponding to the selection frequency of the search pulse group is detected by the detection circuit.

REFERENCES:
patent: 3769632 (1973-10-01), Julisburger et al.
patent: 4012745 (1977-03-01), Brown et al.
patent: 4025926 (1977-05-01), Fujimoto et al.

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