Feed device for flexible workpieces, especially for a sewing mac

Details Feed device for flexible workpieces, especially for a sewing mac Feed device for flexible workpieces, especially for a sewing mac

1977-02-16

1978-07-25

Hunter, H. Hampton

Sewing

Special machines

Darning

112203, D05B 2100

Patent

active

041022807

ABSTRACT:
A feed device for flexible workpieces comprises a clamp for securing two workpieces together. The clamp is movable along a guide in line with the displacement of the workpieces past a sewing station by the sewing machine feed. A retarding force is continuously applied to the clamp to maintain a tension on the workpieces as they are drawn through the sewing station preferably by a turbine driven by compressed air. The retarding force is a continuously applied restoring force which can be switched between a relatively substantial force designed to return the clamp to its starting position and a tension force which can be reduced to substantially a zero value.

REFERENCES:
patent: 3713408 (1973-01-01), Deeks et al.
patent: 3903818 (1975-09-01), Marforio
patent: 4030430 (1977-06-01), Pickert et al.

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