Evacuation system for inking chamber
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United States of America Patent
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Nov 24, 1992
Grant Date -
N/A
app pub date -
Aug 2, 1991
filing date -
Aug 2, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for evacuating ink from the inking trough of a flexographic printing machine uses an air ejector nozzle in the ink drain line to draw ink from the trough. The apparatus includes an air-operated control system in which air valves control an air-bladder pinch valve in the ink drain line and an oil-bladder pinch valve in the air ejector line. An air pressure regulator maintains a pressure charge on an accumulator associated with the oil-bladder pinch valve, in order to provide a gradual increase of air flow to the ejector nozzle to prevent sudden vacuum surge that might over-flex the doctor blades.
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