Sewing machine differential feed

Details Sewing machine differential feed Sewing machine differential feed

1985-12-12

1986-11-25

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

112323, D05B 2724

Patent

active

046242023

ABSTRACT:
A sewing machine which has two substantially independent sets of feed dog teeth comprising a set of main fabric feed dog teeth and secondary or differential feed dog teeth and includes a drive therefore defined by a main drive shaft and a two piece interconnected secondary shaft. Feed dog teeth supporting brackets are mounted between the shafts. A stirrup interconnects the support brackets so that both sets of dog teeth are moved cyclically and in a synchronized manner with one another.

REFERENCES:
patent: 4067274 (1978-01-01), Marforio
patent: 4469039 (1984-09-01), Marchesi
patent: 4527497 (1985-07-01), Kerr et al.

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