Device for regulating upper thread tension of a sewing machine

Details Device for regulating upper thread tension of a sewing machine Device for regulating upper thread tension of a sewing machine

1985-11-07

1987-09-01

Schroeder, Werner H.

Sewing

Elements

Tensioning

D05B 4704

Patent

active

046900829

ABSTRACT:
A device for regulating upper thread tension in a sewing machine having an upper thread tension device with two discs receiving an upper thread therebetween, a spring pressing the discs one against the other, a presser body positioned between the spring and the discs, and a manually operated dial for actuating the presser body, the regulating device having an indicator for indicating a thread tension of a proper value and operatively connectable to the dial and movable thereby, in which a relation between a moving amount of the presser body and a moving amount of the indicator is regulated and a pressure of the thread tension is adjusted to the movement of the thread tension indicator.

REFERENCES:
patent: 3722439 (1973-03-01), Newman
patent: 4221180 (1980-09-01), Coulombe

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