Bobbin exchange judging apparatus

Details Bobbin exchange judging apparatus Bobbin exchange judging apparatus

1997-02-07

1998-06-23

Nerbun, Peter

Sewing

Special machines

Pattern controlled or programmed

112180, 112278, 112279, D05B 1912, D05B 5902, D05B 5904

Patent

active

057690162

ABSTRACT:
A residual thread removing device detects an amount of thread left in a bobbin of a sewing machine. The bobbin exchange time setting means sets a time to exchange a bobbin set in the sewing machine with a new one to a bobbin exchange time at which an amount of thread providing a minimum of unusable thread is left in the bobbin, on the basis of the detected thread amount. With such an arrangement, a bobbin exchange time can be set to an optimal time at which a waste of the thread in a bobbin is minimized, irrespective of a kind of thread and/or thread count.

REFERENCES:
patent: 4359953 (1982-11-01), Martell et al.
patent: 5020461 (1991-06-01), Hanyu et al.
patent: 5143004 (1992-09-01), Mardix et al.
patent: 5322029 (1994-06-01), Fujita

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