Chain-stitch sewing machine with yarn feed adjusting

Details Chain-stitch sewing machine with yarn feed adjusting Chain-stitch sewing machine with yarn feed adjusting

1997-08-08

1998-09-01

Izaguirre, Ismael

Sewing

Special machines

Buttonhole

112255, D05B 306, D05B 4700

Patent

active

057995990

ABSTRACT:
A apparatus for forming a knot where a knot is formed in chain-stitching. In the method, a first loop is formed by a stitch to an article to be sewn, two stitches ahead of a final stitch, is drawn through a second loop which is formed by a stitch one stitch ahead of the final stitch, whereby a knot where the first loop is fastened by the second loop is formed, such that a third loop is inserted through the second loop and is then cut. The sewing machine including a single needle and a rotary looper and including a yarn feed adjusting device for adjusting a degree of feed of a yarn to the single needle. The yarn feed adjusting device sets a fed volume of the yarn during formation of the second loop to a value larger than that of the final or third loop and the first loop.

REFERENCES:
patent: 1415250 (1922-05-01), Leveque
patent: 1438848 (1922-12-01), Miller
patent: 1525643 (1925-02-01), Fifield
patent: 4215641 (1980-08-01), Dobrjanskyj et al.
patent: 5381745 (1995-01-01), Nolle

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