Sewing machine-driving apparatus

Details Sewing machine-driving apparatus Sewing machine-driving apparatus

1991-07-09

1992-09-15

Nerbun, Peter

Sewing

Elements

Starting or stopping

112300, 112163, D05B 6918, D05B 6922

Patent

active

051468620

ABSTRACT:
A sewing machine-driving apparatus forms an accurate and stable seam at a first stitch in a conventional double chain stitch or covering chain stitch sewing machine. Its motor is controlled so as to drive the sewing machine in a direction reverse to that of the usual sewing operation for a limited time period between the completion of a thread cutting operation and a point of time when the sewing machine needles reach their needle-down position. Thus, the stitching needles reach their lowest points without scooping a looper thread at the first stitch; assuring the formation of a stable and accurate seam in the second stitch.

REFERENCES:
patent: 4955306 (1990-09-01), Sato et al.
patent: 5018466 (1991-05-01), Hasegawa

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