Nozzle test apparatus and method for thermal ink jet systems

Details Nozzle test apparatus and method for thermal ink jet systems Nozzle test apparatus and method for thermal ink jet systems

1983-12-14

1986-05-20

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, G01D 1800

Patent

active

045904820

ABSTRACT:
Apparatus and method for testing and determining the operating status of a plurality of ink-ejecting nozzles in a thermal ink jet array. An electrically conductive plate is placed adjacent the ink-ejecting orifices in a test position. An ink droplet appearing from an orifice will, for some brief moment, be in contact with both the orifice plate and the electrically conductive plate. The droplet completes a circuit with a conduction detector and allows current to flow thereby indicating an operative nozzle.

REFERENCES:
patent: 4241357 (1980-12-01), Anestos
patent: 4323905 (1982-04-01), Reitberger
patent: 4389657 (1983-06-01), McMahon
patent: 4484199 (1984-11-01), Watanabe

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