Sewing machine for covering chain stitch
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United States of America Patent
Stats
-
Jul 17, 2012
Grant Date -
Apr 1, 2010
app pub date -
Sep 25, 2009
filing date -
Sep 26, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a sewing machine for covering chain stitch according to the present invention, a thread push member is mounted on a top cover shaft which drives a cover thread looper, and the thread push member is arranged on the cover thread guide. When swinging backward in association with a movement of the cover thread looper, the thread push member pushes the top cover thread passing through a guide hole of the cover thread guide, forcibly moves the top cover thread and keeps the top cover thread near a back end of the guide hole. The top cover thread is arranged at a predetermined position on a surface of a cloth without being affected by a force from the needle thread, and a covering chain stitch can stably be formed with the excellent appearance.
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