Sewing – Method of sewing – Stitch forming
Patent
1998-08-04
2000-09-19
Izaguirre, Ismael
Sewing
Method of sewing
Stitch forming
112199, 112197, D05B 110
Patent
active
061196134
ABSTRACT:
A method and apparatus for preventing a seam from raveling in a double chain stitch sewing machine according to the present invention are applied to sewing of cloth by a double chain stitch sewing machine. Near the sewing end point for forming a double chain stitch by collaboration of a plurality of needles and a looper, the looper thread consecutive to the looper from the cloth is hooked and engaged on the hook at the left side of the needles. After driving the sewing machine for a half stitch or one stitch in this state, the looper thread hooked on the hook is cut off. Simultaneously with this cutting or before or after the cutting, the needle thread loop consecutive to the needles from the sewing end of the cloth through the looper is cut off between the looper and the cloth. Further, capturing the cut looper thread consecutive to the looper from the cloth, the end of the cut looper thread is pulled out from the final needle thread loop at the end of sewing. Therefore, raveling of thread from the sewing end point is prevented, and the length of the thread end consecutive to the sewing end point is short, so that sewn products of good appearance may be obtained.
REFERENCES:
patent: 3386402 (1968-06-01), Ross
patent: 3753410 (1973-08-01), Kostenowczyk
patent: 3867892 (1975-02-01), Ciecior et al.
patent: 5381745 (1995-01-01), Nolle
patent: 5722338 (1998-03-01), Douyasu
patent: 5769018 (1998-06-01), Nakano
Douyasu Osamu
Yamanaka Masami
Izaguirre Ismael
Pegasus Sewing Machine Mfg. Co. Ltd.
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