Deflection compensated ink ejection printing apparatus

Details Deflection compensated ink ejection printing apparatus Deflection compensated ink ejection printing apparatus

1979-12-26

1982-01-12

Hartary, Joseph W.

Recorders

Record receiver deforming

G01D 1800

Patent

active

043108466

ABSTRACT:
Prior to printing, ink drops are ejected from an ink ejection head or nozzle (28) and an amount of deflection is sweepingly varied until the ink drops hit a target (57), thereby providing a reference which compensates for variations in an amount of charge of the ink drops, a deflection voltage and an ink drop velocity. The ink temperature or an ejection pump pressure are sweepingly varied, prior to the deflection sweep operation, until a sensed ink ejection velocity and thereby ink drop mass become equal to a predetermined value to provide a desired printing density or darkness.

REFERENCES:
patent: 3465351 (1969-09-01), Keur
patent: 3787882 (1974-01-01), Fillmore
patent: 3866237 (1975-02-01), Meier
patent: 3898673 (1975-08-01), Haskell
patent: 4136345 (1979-01-01), Neville
Ruddy, G. A.; Viscosity Control Circuit; IBM TDB, vol. 16, No. 10 Mar. 1974, p. 3295.

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