Ink-drop print-head
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United States of America Patent
Stats
-
Jan 15, 1980
Grant Date -
N/A
app pub date -
Feb 27, 1978
filing date -
Mar 1, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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