Automatic back-tack system for industrial sewing machine

Details Automatic back-tack system for industrial sewing machine Automatic back-tack system for industrial sewing machine

1977-12-05

1979-05-15

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

1122621, D05B 6918, D05B 6920

Patent

active

041541790

ABSTRACT:
A high speed electronically controlled industrial sewing machine having an automatic back-tack capability is disclosed. To achieve balanced stitching in the first and last tacks of a seam while still operating at high speed, the stitches in the tacks are counted and additionally a fixed time delay is provided in the feed reversal command circuitry to compensate for system inertias which result in response time delays of the sewing machine to the feed reversal command signals.

REFERENCES:
patent: 3074632 (1963-01-01), Braun et al.
patent: 3363594 (1968-01-01), Kosrow
patent: 4080914 (1978-03-01), Ishida et al.

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