Sewing – Work manipulating – Guides
Patent
1981-02-02
1983-05-31
Schroeder, Werner H.
Sewing
Work manipulating
Guides
112168, 1122621, D05B 302
Patent
active
043855725
ABSTRACT:
A drop-in pattern stitch assembly for a straight stitch sewing machine comprised of a first drop-in cam drive sub-assembly located at and driven from the forward end of the machine's existing horizontal drive shaft for controlling the lateral zig-zag motion of the machine's needle bar, and a second drop-in cam drive sub-assembly located at and driven from the rearward portion of the horizontal drive shaft for controlling the rotational action of the machine's feed fork regulator, for, in turn, regulating the action of the machine's feed rock unit which moves material on the machine's needle plate. It is contemplated that a standard straight stitch sewing machine can be easily upgraded, first to a simply zig-zag sewing machine, and thereafter to more complex pattern machines, by installation of appropriate drop-in cam drive sub-assemblies of the invention. A special pattern cam belt is adapted for installment between the two in place cam drive sub-assemblies of the invention.
REFERENCES:
patent: 2854935 (1958-10-01), Benink et al.
patent: 3005427 (1961-10-01), Engel
patent: 3177835 (1965-04-01), Tanaka et al.
patent: 3242890 (1966-03-01), Fresard
patent: 3724282 (1973-04-01), Daman
Falik Andrew M.
Schroeder Werner H.
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