Needle thread tension control including separate stopping and ad

Details Needle thread tension control including separate stopping and ad Needle thread tension control including separate stopping and ad

1988-05-16

1989-12-12

Falik, Andrew M.

Sewing

Elements

Tensioning

112229, 112250, 112255, 112302, D05B 4704

Patent

active

048860042

ABSTRACT:
In a sewing machine provided with a thread supply stopping device for selectively controlling supply of a needle thread between a needle thread supply source and a take-up lever, an adjustable pre-tension exerting device exerts a tension equal to or lower than a tension of a bobbin thread on the needle thread between the needle thread supply source and the thread stopping device.

REFERENCES:
patent: 2955775 (1960-10-01), Johnson
patent: 2993456 (1961-07-01), Herbst
patent: 4235178 (1980-11-01), Ackermann
patent: 4429649 (1984-02-01), Eguchi et al.
patent: 4632048 (1986-12-01), Matsubara
patent: 4694765 (1987-09-01), Diehl
patent: 4776293 (1988-10-01), Yoshida
patent: 4791876 (1988-12-01), Sasaki et al.
patent: 4793273 (1988-12-01), Hara et al.

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