Sewing machine with upper and lower workpiece transporters

Details Sewing machine with upper and lower workpiece transporters Sewing machine with upper and lower workpiece transporters

1979-10-31

1982-01-19

Hunter, H. Hampton

Sewing

Stitch forming

Feeding work material

112304, D05B 2716

Patent

active

043111068

ABSTRACT:
A sewing machine designed to stitch together two stacked fabric layers advancing at different speeds comprises an upper and a lower conveyor belt coupled with a common drive shaft by a differential gearing. The relative speed of the two conveyor belts can be manually adjusted with the aid of a friction coupling comprising two mutually parallel larger disks with relatively offset axes and overlapping surface areas contacted by a smaller disk perpendicular thereto, the latter disk being displaceable in a common axial plane of the two larger disks to vary their transmission ratio.

REFERENCES:
patent: 2974617 (1961-03-01), Hacklander
patent: 3368507 (1968-02-01), Orth
patent: 3800719 (1974-04-01), Rockerath
patent: 4037546 (1977-07-01), Kleinschmidt
patent: 4109595 (1978-08-01), Ducol et al.

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