Chain-off forming apparatus for cover stitch sewing machines
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United States of America Patent
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-
Aug 8, 2000
Grant Date -
N/A
app pub date -
Jul 28, 1999
filing date -
Sep 22, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A needle plate of a cover stitch sewing machine, adapted to introduce double chain stitch chain-off's, which are formed below a needle plate by the intertwining of threads on three needles and a thread on a looper in accordance with actions of the needles and looper occurring when fabrics to be sewn are not fed, onto the portion of an upper surface of the needle plate which is behind needle points, and feed out the chain-off's continuously with the chain-off's held between rear feed dogs on the rear side of the needle points and a chain-off thread gripper, is provided with a thread positioning spreader formed of retainers 10A, 10B having inclined portions indexed to the needle points and provided between recesses of the needle plate so that the chain-off stitches can be sewn continuously in a stable condition by a simple structure.
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Family
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Cited Art Landscape
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