Print pulse control circuit for electrostatic fluid jet applicat

Details Print pulse control circuit for electrostatic fluid jet applicat Print pulse control circuit for electrostatic fluid jet applicat

1987-07-17

1989-03-14

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Wave form or wave shape determinative or pulse-producing...

346 75, 307107, G01D 1800

Patent

active

048126730

ABSTRACT:
A print pulse control and driver circuit for an electrostatic fluid jet applicator is provided which promotes enhanced image quality by adjustably controlling the rising and falling edge duration of print pulses that are applied to the applicator's charge electrode array. The control circuit in pattern printing applications employs a print pulse drive bus which is shared by a large number of high voltage charge electrode drive circuits. Print pulses present on the bus are selectively used to gate high voltage to individual charge electrodes. In addition, the print pulse control circuit includes circuitry for detecting short circuits on an individual electrode basis.

REFERENCES:
patent: 3596276 (1971-07-01), Lovelady
patent: 3681778 (1972-08-01), Keur
patent: 3761941 (1973-09-01), Robertson
patent: 3789422 (1974-01-01), Haskell et al.
patent: 3868698 (1975-02-01), Dressler
patent: 3928855 (1975-12-01), Helinski et al.
patent: 4060813 (1977-11-01), Yamada et al.
patent: 4087825 (1978-05-01), Chen et al.
patent: 4178597 (1979-12-01), Isayama et al.
patent: 4275402 (1981-06-01), Kern
patent: 4650694 (1987-03-01), Dressler et al.

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