Upper thread cutting unit in buttonhole sewing machines
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United States of America Patent
Stats
-
Mar 5, 1985
Grant Date -
N/A
app pub date -
Oct 6, 1983
filing date -
Oct 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An upper thread cutting unit in buttonhole sewing machines wherein a lever is provided for connecting and disconnecting the support of the thread cutting unit to and from a supporting member, connected via a lever and rod system, to the stop device of the sewing machine. Two appropriately set springs force the thread cutting unit, at the end of the sewing cycle, under the needle to catch and cut the upper thread and force the unit away from the needle to permit raising higher the work presser frame.
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Cited Art Landscape
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