Ultrasonic web edge guide circuit
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United States of America Patent
Stats
-
Oct 16, 1990
Grant Date -
N/A
app pub date -
Feb 6, 1990
filing date -
Feb 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic servo controller circuit is disclosed which is used to detect the edge of a web and adjust the web position as it is dispensed from a pay-off roll to packaging machinery. The circuit is utilized to control a motor which operates a linear actuator to 'de-oscillate' the web thereby providing the packaging machinery with a steady, non-oscillating sheet of material.
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