Thread feeding apparatus for multi-needle sewing machine

Details Thread feeding apparatus for multi-needle sewing machine Thread feeding apparatus for multi-needle sewing machine

1988-04-28

1989-07-04

Nerbun, Peter

Sewing

Stitch forming

Multiple needle

112302, 11212111, D05B 108, D05B 4500

Patent

active

048439860

ABSTRACT:
When two stitch lines parallel with the hem of a workpiece are stitched by a multi-needle sewing machine, a thread feeding apparatus positively feeds threads to each needle in proportion to the radius of the stitch line curvature such that well-balanced stitch lines are performed. Sensors located adjacent to said needles, and CPU (Central Processing Unit) operate cooperatively to drive each stepping motor which positively feeds the exactly required stitch length to each needle.

REFERENCES:
patent: 3609373 (1971-09-01), Desai et al.
patent: 4664048 (1987-05-01), Naganuma et al.
patent: 4766827 (1988-08-01), Matsubara
patent: 4784071 (1988-11-01), Sadeh et al.

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