Snap action thread and gimp trimming on a buttonhole machine
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United States of America Patent
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Sep 5, 1995
Grant Date -
N/A
app pub date -
Sep 29, 1993
filing date -
Sep 29, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to thread trimming devices for eyelet buttonhole machines. The invention comprises a thread trimming device having a snap action spring arm knife. As the thread hook positions the thread and gimp, a cam lifts up the end of the spring arm. The cam then releases the knife whose torque snaps down and cuts the thread and gimp against a second knife edge. The thread and gimp are also held together at this point for the next buttonhole by a thread retainer which is built into the knife.
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