Stitch balancing thread tension device for sewing machine

Details Stitch balancing thread tension device for sewing machine Stitch balancing thread tension device for sewing machine

1993-05-07

1995-01-17

Nerbun, Peter

Sewing

Elements

Tensioning

D05B 4702

Patent

active

053817443

ABSTRACT:
A stitch balancing thread tension device for a sewing machine, the body of which is inserted into the opening portion of the sewing machine body, wherein the thread tension device body for supporting a stem on which a pair of tension discs are fit, comprises a projecting portion which contacts the outer side surface of the sewing machine body and pawls which are retained at the circumferential edge of the opening portion by the inner side surface of the sewing machine body for clamping the sewing machine body therebetween. The pawls are elastically invaginable into the thread tension device body to release the sewing machine body from clamping. Since the thread tension device can be attached to or detached from the sewing machine body in one-shot operation, the operability is remarkably improved in efficiency.

REFERENCES:
patent: 4111141 (1978-09-01), Thomson
patent: 4466371 (1984-08-01), Larsen
patent: 5191847 (1993-03-01), Kojima et al.
patent: 5211122 (1993-05-01), Lin

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