Rotary-gripper counter-hook for double-lock-stitch sewing machines
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United States of America Patent
Stats
-
Jul 3, 1984
Issued Date -
N/A
app pub date -
Mar 23, 1981
filing date -
Jan 30, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A double-lock-stitch sewing machine has a reciprocating needle forming an upper-thread loop with the aid of a rotary gripper assembly. The loop is carried by and formed by a main hook or point of the assembly around a stationary bobbin to engage a bobbin thread in a double-lock-stitch. A counter hook or counter point on the gripper assembly, which normally serves only to control movement of the loop from the main point, is formed on an underside with an auxiliary hook portion for drawing an extra thread length from the supply during each stitch and thus inhibiting bunching of the workpiece.
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Family
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Cited Art Landscape
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