Automatic needle thread control apparatus

Details Automatic needle thread control apparatus Automatic needle thread control apparatus

1981-01-28

1983-10-11

Schroeder, Werner H.

Sewing

Elements

Thread guiding or handling

112243, 112278, D05B 4900, D05B 4704

Patent

active

044085540

ABSTRACT:
An automatic thread regulating system having an adjustment mechanism for controlling the thread feed and takeup during the formation of a sewing machine stitch. A central processing unit calculates the length of thread required for a specific stitch formation based on work piece thickness and stitch length. This information is directed to the adjustment mechanism which thereby regulates the appropriate thread amount by feed rolls and a suction apparatus.

REFERENCES:
patent: 4215641 (1980-08-01), Dobnjanskyj et al.
patent: 4295435 (1981-10-01), Uemura et al.

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