Drop quality control system for jet printing
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United States of America Patent
Stats
-
May 23, 1995
Grant Date -
N/A
app pub date -
Oct 3, 1991
filing date -
Oct 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus are disclosed for controlling the flight time and composition of a marking fluid used in a continuous jet marking system. A three-way valve permits switching between fresh ink and system ink supplies. Periodically a comparison of pressure required to maintain a constant drop flight time is made by a controller. Because both supplies are in the same operating environment any difference in pressure is due to a change in system ink viscosity. Solvent is added, if necessary, to the system ink via a pump to restore viscosity to desired values.
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Cited Art Landscape
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