Gap stitch mechanism for sewing machines

Details Gap stitch mechanism for sewing machines Gap stitch mechanism for sewing machines

1980-10-01

1983-06-21

Nerbun, Peter P.

Sewing

Elements

Driving mechanisms

D05B 6902

Patent

active

043888852

ABSTRACT:
A gap stitch mechanism for a sewing machine containing a needle shaft which is oscillatingly driven by a crank assembly, wherein the crank assembly is provided with means for reducing the crank radius at predetermined intervals during the sewing operation, thereby determining the stroke of the needle shaft and making it impossible for the loop catcher to catch the needle thread.

REFERENCES:
patent: 1191232 (1916-07-01), Richards
patent: 3507236 (1970-04-01), Komuro
patent: 3839972 (1974-10-01), Scott et al.

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