Sewing machine having top and bottom feed synchronizing means

Details Sewing machine having top and bottom feed synchronizing means Sewing machine having top and bottom feed synchronizing means

1974-12-04

1976-05-04

Krizmanich, George H.

Sewing

Stitch forming

Chain or double chain

112212, 226111, D05B 2706

Patent

active

039540715

ABSTRACT:
A sewing machine for sewing two material layers to each other in aligned positions, comprises a top feeding mechanism engageable with a top layer for feeding it and a bottom feed mechanism engageable with a bottom layer of material for feeding it. The top and bottom feeding mechanisms are connected to a synchronizing device which regulates the relative speed between the two. A sensor or measuring means is engageable with the material being fed and is connected to the synchronizing means in order to vary the relative speed of the top and bottom feeds in accordance with the actual feed of the material layers.

REFERENCES:
patent: 1060799 (1913-05-01), Van Horn
patent: 3782310 (1974-01-01), Stockel
patent: 3867889 (1975-02-01), Conner

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