Stitch quality monitoring system for sewing machines

Details Stitch quality monitoring system for sewing machines Stitch quality monitoring system for sewing machines

1996-05-17

1998-05-05

Nerbun, Peter

Sewing

Elements

Thread sensing

D05B 6936

Patent

active

057461457

ABSTRACT:
Stitch quality monitoring system for use in combination with a sewing machine having one or more stitch threads and comprising sensor means for at least one of said one or more stitch threads for detecting thread motion during each sewing stitch cycle. Encoder means is operatively associated with the sewing machine for creating a predetermined constant number of sensor means sampling signals for each stitch cycle of the sewing machine, and circuit means is electrically connected to the sensor means and encoder means for detecting stitch defects during the formation of potentially defective stitches.

REFERENCES:
patent: 4429651 (1984-02-01), Tajima
patent: 4938159 (1990-07-01), Shibata
patent: 5233936 (1993-08-01), Bellio
Publication by J. Lewis Dorrity and L. Howard Olson, Thread Motion Ratio Used to Monitor Sewing Machines, Textile Process Control 2001 International Conference, Manchester, England (May 18, 1995).

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