Device for clamping the workpiece in a sewing machine

Details Device for clamping the workpiece in a sewing machine Device for clamping the workpiece in a sewing machine

1976-05-07

1977-06-28

Hunter, H. Hampton

Sewing

Special machines

Buttonhole

D05B 300

Patent

active

040318354

ABSTRACT:
This invention relates to a device for selectively actuating the workpiece clamp of an automatically controlled bar tacker sewing machine utilizing electrically operated pneumatic cylinders operatively connected to the upper clamping element to cause release of the workpiece. The clamp feet are releasably independent of other sewing operations. The upper clamping plate and the feed plate are secured to the clamp assembly by quick change fittings.

REFERENCES:
patent: 2040260 (1936-05-01), Kenny
patent: 2963999 (1960-12-01), Braun et al.
patent: 3572267 (1971-03-01), Beazley
patent: 3669043 (1972-06-01), Nicolay
patent: 3859936 (1975-01-01), Bianchi

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