Thread tensioning device for sewing machine

Details Thread tensioning device for sewing machine Thread tensioning device for sewing machine

1993-04-27

1995-01-03

Crowder, Clifford D.

Sewing

Elements

Tensioning

242150R, D05B 4700

Patent

active

053776062

ABSTRACT:
A thread tension device for overlock sewing machines, which provides a thread tensioner and a regulator. The thread tensioner includes a pair of thread tensioning discs supported on a rotatable shaft and slidably movable axially on said shaft and a spring having one end supported on a spring holder threadably movable on a sleeve and the other end abutted against one of the thread tensioning plates. The regulator includes a rotary member fixed to the shaft and rotatably driven with the shaft; and a follower having one side held against the rotary member and the other side abutted against the other one of the thread tensioning plates over the spring.

REFERENCES:
patent: 2937605 (1960-05-01), Dunn et al.
patent: 2955775 (1960-10-01), Johnson
patent: 3150846 (1964-09-01), Laidig
patent: 4611547 (1986-09-01), Kuramoto
patent: 5156105 (1992-10-01), Wang
patent: 5211122 (1993-05-01), Lin
patent: 5216970 (1993-06-01), Sakuma

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