Sewing – Elements – Tensioning
Patent
1987-11-04
1989-02-14
Falik, Andrew M.
Sewing
Elements
Tensioning
242150R, D05B 4702
Patent
active
048039365
ABSTRACT:
A plurality of tension disk assemblies in an overedge sewing machine are disposed on a shaft supported for rotation around its axis and are spaced apart from each other in an axially distributed relationship. Each tension disk assembly comprises first and second tension disks forming a pair for holding therebetween a thread to be tensioned. The first tension disk is movable in opposite directions axially of the shaft, and the second disk is substantially immovable in the direction of the axis of the shaft. The resilient force of a spring acts on each first tension disk, whereby the latter is pressed against the second tension disk associated therewith. When the shaft is turned, as by a manual operating lever, this rotary motion is converted into a linear motion through a cam device. This linear motion removes the resilient force of the spring from the first tension disk. Thus, a thread tension released state is established simultaneously in the plurality of tension disk assemblies.
REFERENCES:
patent: 3356050 (1967-12-01), Urscheler
patent: 3941068 (1976-03-01), Washburn
patent: 3967657 (1976-07-01), Cugini
Koshinaka Osamu
Mikuni Yoshio
Falik Andrew M.
Maruzen Sewing Machine Co., Ltd.
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