Sewing – Method of sewing – Stitch forming
Patent
1996-04-10
1998-06-23
Izaguirre, Ismael
Sewing
Method of sewing
Stitch forming
112200, D05B 6100
Patent
active
057690189
ABSTRACT:
In a looper thread control device for a double chainstitch sewing machine, the sewing needles are lowered securely into a thread triangle, even under the conditions of low thread tension and high speed operation, and with an elastic looper thread, without rib formation or skipped stitches in the fabric. A looper thread support member 1 moves up and down in cooperation with sewing needles NL, NR near the left end of the looper L. The looper thread support member 1 enters into the triangle prior to the descent of the sewing needles, and seizes the looper thread LT. The looper thread support member 1 holds the looper thread until the eyelet LE on the looper moves to the right side of the looper thread support member 1, thereby pulling out the looper thread LT from the thread source, and then releases the looper thread.
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patent: 3753410 (1973-08-01), Kostenowczyk
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patent: 4325314 (1982-04-01), Niem
patent: 4480562 (1984-11-01), von Hagen et al.
patent: 4974534 (1990-12-01), Eberhahn et al.
Izaguirre Ismael
Pegasus Sewing Machine Mfg. Co. Ltd.
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