Incremental printing of symbolic information – Ink jet – Controller
Patent
1993-03-29
1994-12-06
Hartary, Joseph W.
Incremental printing of symbolic information
Ink jet
Controller
347 68, B41J 3045
Patent
active
053715209
ABSTRACT:
An apparatus discharges ink droplets by use of pressure wave motion which occurs in a ink pressure chamber through shrinkage and expansion of an electromechanical transducing element provided in the ink pressure chamber having nozzles at the tip end. The shrinkage of the transducing element abruptly is caused to occur and also the shrinkage is maintained for a certain period of time, and subsequently expansion is abruptly caused to occur to release shrinkage to a certain level, and further a driving voltage to release gradually the shrinkage is applied on the electromechanical transducing element. A method of driving an ink jet head included in such an apparatus comprises generating a drive pulse that shrinks the transducing element, abruptly expands it to a certain level after a certain period of time and then gradually releases the remaining amount of shrinkage.
REFERENCES:
patent: 4393384 (1983-07-01), Kyser
patent: 4897665 (1990-01-01), Aoki
patent: 4980699 (1990-12-01), Tanabe
Driving Pressure Wave Shape for Drop Ejector, IBM Tech. Disc. Bulletin, vol. 29, No. 7, Dec. 1986, pp. 2922-2923.
Canon Kabushiki Kaisha
Hartary Joseph W.
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