Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1985-01-07
1986-09-16
Goldberg, E. A.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346 75, G01D 1518
Patent
active
046125531
ABSTRACT:
A method and apparatus for monitoring and regulating the ink droplet velocity in the ink supply system of an ink jet printer is proposed which essentially comprises an ink jet propulsion member, a charging electrode, a charge detector, a deflection electrode and an ink droplet catch gutter. In the method, during a non-writing or non-recording dead-time interval (PHASING), a first relatively small number of ink droplets is relatively weakly charged and a second, nearly twice as great, number of droplets remains uncharged. A signal is detected which is nearly proportional to the droplet velocity of the first, weakly charged, ink droplets and is employed for monitoring and regulating the ink droplet velocity or for pressure-dependently regulating an ink jet velocity or both. The apparatus further comprises a control unit with an input conductor for a feedback signal from the charge detector and at least a first output conductor for signals from the control unit for regulating the electrostatic charge on the charging electrode.
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Contraves GmbH
Goldberg E. A.
Kleeman Werner W.
Preston Gerald E.
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