Driving mechanism for the upper looper in overlock sewing machin

Details Driving mechanism for the upper looper in overlock sewing machin Driving mechanism for the upper looper in overlock sewing machin

1989-08-23

1991-02-12

Schroeder, Werner H.

Sewing

Stitch forming

Chain or double chain

112200, D05B 5714

Patent

active

049915258

ABSTRACT:
The driving mechanism comprises a driving arm (10) fastened to a drive shaft (9) operated with an oscillatory movement about its own axis. Pivoted to the free end of the driving arm (10) is a support arm (11) carrying an upper looper (4). The support arm is also fastened to an auxiliary arm (12) pivotally mounted to a bearing pin (13). The bearing pin is eccentrically fixed to an auxiliary pivot pin (15) housed in the machine bed (2), with possibility of rotation about an axis which is offset relative to the axis of the support pin. The auxiliary pin (15) can be selectively oriented about its own axis according to different angular positions for the purpose of modifying the position of the axis of the bearing pin (13) and, as a result, the path taken by the upper looper (4).

REFERENCES:
patent: 1213424 (1917-01-01), Seymour
patent: 1419997 (1922-06-01), Valois
patent: 3871311 (1975-03-01), Ciecior et al.

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