Looper drive for a buttonhole sewing machine
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United States of America Patent
Stats
-
Feb 2, 1999
Grant Date -
N/A
app pub date -
Feb 21, 1996
filing date -
Feb 21, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A looper drive assembly for a buttonhole sewing machine includes a long arm which is driven by a double cam, followers and an oscillating plate at one end and the arm generally reciprocates longitudinally. V-shaped plates are pivoted at a second end of the arm. Ends of the V-shaped plates are connected to rocking links which carry the looper needles. The links are pivoted on shafts and support the V-shaped plates and the second end of the arm. As the arm reciprocates, the V-shaped plates swing, pull and push lower ends of the link and oscillate the links around shafts for alternating engagement of the looping needles with thread carried through a fabric by a main needle.
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Family
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Cited Art Landscape
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