Multiple hem stitches and apparatus for forming the same

Details Multiple hem stitches and apparatus for forming the same Multiple hem stitches and apparatus for forming the same

1984-03-05

1986-04-08

Reynolds, Wm. Carter

Sewing

Stitch forming

Overseaming

112166, 112199, 112438, 112441, D05B 110, D05B 122, D05B 5706

Patent

active

045805148

ABSTRACT:
Multiple hem stitches are produced for joining a plurality of superimposed fabric materials along their edges by employing a sewing machine having a pair of vertically reciprocating needles each carrying a needle thread and a pair of loopers each carrying a looper thread. The first and second needle threads extend along the fabric edge and in parallel with each other on the upper face of the fabrics and penetrate through the fabrics to form a first and second needle thread loops on the underside of the fabrics. The first needle thread loop is distended laterally to the fabric edge by the first looper. The first looper thread encompasses the first needle thread at each penetration point and extends laterally on the upper face of the fabrics to form a first looper thread loop which is caught by the descending first needle to be interlocked with the first needle thread loop along the fabric edge. The second looper thread extends on the underside of the fabrics beneath the second needle thread and pierces the second needle thread loop to form a second looper thread loop which is looped about the first needle thread at each penetration point.

REFERENCES:
patent: 1640201 (1927-08-01), Maier
patent: 2248907 (1941-07-01), Lutz
patent: 3126850 (1964-03-01), Sigoda
patent: 3145672 (1964-08-01), Marforio
patent: 4117792 (1978-10-01), Navlyt

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