Upper feed dog automatic regulator for overlock machine

Details Upper feed dog automatic regulator for overlock machine Upper feed dog automatic regulator for overlock machine

1983-09-12

1985-03-12

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

112320, D05B 2708

Patent

active

045037949

ABSTRACT:
An upper feed dog automatic regulator for an overlock machine has an upper feed dog divided into a front part and a rear part. The greatest lower bound in a locus of motion of the upper feed dog varies automatically in response to the thickness of fabric being sewn so as to avoid uneven material feed, puckering between the front and rear upper feed dogs, and other sewing troubles.

REFERENCES:
patent: 3326157 (1967-06-01), Hayes et al.
patent: 3450079 (1969-06-01), Lukin
patent: 3611817 (1971-10-01), Smith
patent: 4140070 (1979-02-01), Travaglini

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