Threading apparatus for a lower looper of an overlock sewing mac

Details Threading apparatus for a lower looper of an overlock sewing mac Threading apparatus for a lower looper of an overlock sewing mac

1991-03-28

1991-12-31

Schroeder, Werner H.

Sewing

Stitch forming

Chain or double chain

112162, 112302, D05B 5700

Patent

active

050761811

ABSTRACT:
A threading device for threading a lower looper of an overlock sewing machine, an orifice and a slot are formed in an arm of the lower looper, a hook if formed on a rear end of the arm and obliqued from the arm at a sharp angle, a holder is formed on one end of a lever, a thread threaded through the orifice of the arm can be carried by the holder toward the rear end of the arm, the thread will slip over the hook and located behind the hook when the holder moves beyond the hook, and the thread can be hooked by the hook and received in the slot of the arm when the lever is released.

REFERENCES:
patent: 541518 (1895-06-01), Woodward
patent: 2778329 (1957-01-01), Howell et al.
patent: 3333560 (1967-08-01), Wiener et al.
patent: 4649843 (1987-03-01), Muroi et al.
patent: 4977842 (1990-12-01), Fukao et al.

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