Thread control for overedge sewing machine

Details Thread control for overedge sewing machine Thread control for overedge sewing machine

1974-12-12

1976-03-02

Krizmanich, George H.

Sewing

Stitch forming

Overseaming

112241, D05B 5706

Patent

active

039410684

ABSTRACT:
A thread control mechanism for an overedge sewing machine uses only the movable driven components of the needle, lower looper, and upper looper, in combination with stationary thread guides, for feeding and controlling the threads used by the machine to form a seam. The lower and upper looper threads, i.e., the threads which pass through the eye of the lower and upper loopers, respectively, are each engaged by movable thread guides carried on the looper carriers for both loopers so that the coordinated movement of the two loopers cooperate to control and feed both looper threads. A needle thread takeup cam mounted on and driven by the needle arm drive shaft cooperates with stationary thread guides to feed and control the needle thread.

REFERENCES:
patent: 932272 (1909-08-01), Grieb
patent: 1663488 (1928-03-01), Berger
patent: 2494901 (1950-01-01), Rubel
patent: 2704042 (1955-03-01), Wallenberg et al.
patent: 3688711 (1972-09-01), Szostak et al.

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