Device for controlling the looper thread of a double chainstitch

Details Device for controlling the looper thread of a double chainstitch Device for controlling the looper thread of a double chainstitch

1985-06-07

1987-02-17

Reynolds, Wm. Carter

Sewing

Stitch forming

Chain or double chain

D05B 110, D05B 5702

Patent

active

046431144

ABSTRACT:
A device for controlling the looper thread of a double chainstitch sewing machine has a looper which can be oscillatingly driven in the sewing direction. A link mechanism is provided to drive the spreader, said link mechanism being designed as a six-bar linkage mechanism with a four-bar linkage and a secondary two-link group. The basic linkage and the two-link group are arranged in such a manner that two links are guided during a movement of the spreader in an extreme position in which it does not spread the looper thread. Thus a spreader movement is produced which is particularly adapted to the sewing process.

REFERENCES:
patent: 1949073 (1934-02-01), Gruman et al.
patent: 3093821 (1975-09-01), Marforio
patent: 4422398 (1983-12-01), Dusch

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