Ink-jet device having phase shifted driving signals and a drivin

Details Ink-jet device having phase shifted driving signals and a drivin Ink-jet device having phase shifted driving signals and a drivin

1996-06-18

1999-06-01

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 11, B41J 2938

Patent

active

059092289

ABSTRACT:
An ink-jet device and a method for driving the ink-jet device, wherein the pulse width WB of a second driving waveform agrees with a one-way propagation time T, 12 .mu.sec, of an ink pressure wave in ink flow passages. Therefore, there is established a relatively high pressure in the vicinity of nozzles of the ink flow passages, ejecting the ink from the nozzles at a relatively high jet velocity. The pulse width WA of a first driving waveform is shorter than the one-way propagation time T, of the ink pressure wave in the ink flow passages so that ink pressure is reduced in the vicinity of the nozzles of the ink flow passages, causing ink ejection from the nozzles at a slower jet velocity as compared with ink projection with the second driving waveform. On a recording medium, therefore, high-quality printing can be effected without deviation of an ink-jet target position, regardless of the phase of the driving waveform.

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patent: 5300968 (1994-04-01), Hawkins
patent: 5550568 (1996-08-01), Misumi

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