Ink-drop print-head

Details Ink-drop print-head Ink-drop print-head

1978-02-27

1980-01-15

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1516

Patent

active

041841697

ABSTRACT:
A drop-on-demand ink-drop printer (as opposed to a continuous-droplet-stream printer) has a printhead through which ink flows continuously. In the vicinity of the orifice through which drops are expelled there is a constriction, for instance a Venturi tube, which (a) maintains a negative meniscus at the orifice, and (b) prevents any accumulation of detritus or gas at the orifice. The ink drop is expelled by some form of shock-wave producing means.

REFERENCES:
patent: 3747120 (1973-07-01), Stemme
Brownlow et al., Ink on Demand using Silicon Nozzles, IBM Tech. Disc. Bulletin, vol. 19, No. 6, Nov. 1976, pp. 2255-2256.

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