Overlock sewing machine
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United States of America Patent
Stats
-
Oct 28, 2003
Grant Date -
Oct 31, 2002
app pub date -
Apr 15, 2002
filing date -
Apr 17, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-needle overlock sewing machine comprises a throat plate and a middle tongue. The throat plate has an opening needle hole and an outer tongue. The middle tongue is disposed parallel to the outer tongue, a thread chain is formed so as to envelop both tongues. The presser foot is disposed so as to press the cloth to the throat plate by a spring. A push-up lever lifts up the presser foot by handling. The push-up lever and the middle tongue are coupled together by a transmission mechanism. By raising the presser foot by manipulation of the push-up lever at the finish of sewing operation, the middle tongue draws back simultaneously and retreats from the needle hole. As a result, the manipulation for drawing back the middle tongue during the process of thread chain handling is not needed, and the operation is simplified.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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