Fabric tensioning device in a double cylinder circular knitting machine
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United States of America Patent
Stats
-
Aug 7, 1990
Grant Date -
N/A
app pub date -
Sep 22, 1989
filing date -
Sep 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A knitwork tensioning device has a fabric locking mechanism normally disposed in the lower needle cylinder of a double cylinder circular knitting machine. The fabric locking mechanism has a set of locking fingers capable of fluid pressure actuation for locking the fabric being knitted against the bottom end of an inner movable tube within the upper needle cylinder. The fabric locking mechanism is itself capable of fluid pressure actuation for movement into the upper needle cylinder. Locked against the inner movable tube by the locking fingers, the fabric is stretched as the fabric locking mechanism travels with the inner movable tube up into the upper needle cylinder under fluid pressure. The upper needle cylinder has also mounted therein an outer movable tube slidably fitted over the inner movable tube. The outer movable tube can be lowered into locking engagement with the fabric for holding the same under tension, so that the knitting operation can be continued when the fabric locking mechanism, after completing its upward stroke, is retracted back into the lower needle cylinder for reengaging the fabric at its lower part.
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