Overlock sewing machine
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United States of America Patent
Stats
-
Jan 27, 1998
Grant Date -
N/A
app pub date -
Mar 5, 1996
filing date -
Mar 30, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An overlock sewing machine which can switch its operation from an ordinary over-edge chain stitch to a rolled seam or vice versa with no requirement for a complicated operation of adjusting thread tension is obtained. This overlock sewing machine is provided with a spring for providing a thread with prescribed tension. The overlock sewing machine is further provided with a switching mechanism for switching the thread tension between that for the rolled seam and that for the over-edge chain stitch by switching the spring between a tensioning state and a non-tensioning state. Thus, the thread tension is readily switched between that for the rolled seam and that for the over-edge chain stitch.
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Cited Art Landscape
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