Device for correcting ink dot misplacement in ink-jet printing

Details Device for correcting ink dot misplacement in ink-jet printing Device for correcting ink dot misplacement in ink-jet printing

1981-03-11

1983-02-01

Schreyer, Stafford D.

Recorders

Record receiver deforming

346146, G01D 1518

Patent

active

043718787

ABSTRACT:
In an electrostatic type ink-jet printer of the type leaving "guard drops" between charged drops, an electronic circuit is provided which generates charge-enabling signals in response to which guard drops are charged. When a sync signal is generated which synchronizes the rotation of a rotary drum with a print signal, one of the charge-enabling signals which is timed to charge an ink drop causes this ink drop to be charged. As compared with the prior art, ink dot misplacement due to the out-of-synchronization which in turn is due to the variations in rotation of the rotary drum can be more finely corrected. In addition, ink dot misplacement can be more precisely corrected by controlling the charge on an ink drop by pulses which have divided periods of that of the sync signals and which are synchronized with the sync signals.

REFERENCES:
patent: 3562757 (1971-02-01), Bischoff
patent: 3588906 (1971-06-01), Van Brimer
patent: 4313123 (1982-01-01), Jinnai

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