Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1997-11-21
2000-11-28
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 218
Patent
active
061525596
ABSTRACT:
An ink supply device is fluidly connected to a ink-jet head by first and second ink channels. The first ink channel connects an ink tank of the ink supply device to an inlet of a manifold of a ink-jet head, and the second ink channel connects an outlet of the manifold to the ink tank. In the ink-jet head, a plurality of pressure chambers each communicating with the manifold and a plurality of nozzles each connected to each pressure chamber are formed. During purging, ink is expelled by increasing pressure in the ink tank so that the ink flows through the manifold, pressure chambers, and nozzles, in that order. At the same time, ink flows through the first ink channel, the manifold, and the second ink channel to be collected in the ink tank. During the purging, the amount of ink expelled and the amount of ink collected can be maintained at appropriate values since the flow resistance In the plurality of parallel ink channels connecting the pressure chambers and nozzles is set from about 1 to 5 times the flow resistance of the second ink channel.
REFERENCES:
patent: 4121222 (1978-10-01), Diebold et al.
patent: 4380770 (1983-04-01), Maruyama
patent: 4558326 (1985-12-01), Kimura et al.
patent: 5818485 (1998-10-01), Rezanka
Brother Kogyo Kabushiki Kaisha
Le N.
Nghiem Michael
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