Automatic character height control for ink jet printers

Details Automatic character height control for ink jet printers Automatic character height control for ink jet printers

1992-01-30

1995-03-07

Grimley, A. T.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 74, 347 76, 347 79, 347 80, B41J 212

Patent

active

053962737

ABSTRACT:
A microprocessor-based control system for use in ink jet printers periodically measures flow rate of marking fluid, flow time or flight time of marking fluid drops and adjusts the voltage supplied to deflection electrodes-to maintain constant character height notwithstanding changes in the printer operating environment that would otherwise result in undesirable variation in character height. An alternate embodiment uses the flow time, flow rate or flight time information to adjust the charge amplifier gain, rather than the deflection voltage, to achieve the same result.

REFERENCES:
patent: 4015267 (1977-03-01), Kasubuchi et al.
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patent: 4542385 (1985-09-01), Jinnai et al.
patent: 4555712 (1985-11-01), Arway et al.
patent: 4562442 (1985-12-01), Jinnai et al.
patent: 4797688 (1989-01-01), Furukawa
patent: 4827280 (1989-05-01), Stamer et al.
patent: 4847631 (1989-07-01), Naruse et al.

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