Arrangement for setting thread tension

Details Arrangement for setting thread tension Arrangement for setting thread tension

1997-08-08

1998-12-01

Mansen, Michael

Winding, tensioning, or guiding

Tension control or brake

Supply controlled

242150R, 242154, 2424197, B65H 5922, B65H 5912

Patent

active

058426612

ABSTRACT:
The arrangement can control the pulling tension of a thread 1 during its wind-off or wind-up, from or to a spool 3. The arrangement includes a thread brake 5 having a local portion 6 and a portion 8 movable relative thereto, between which the thread 1 is pulled during the wind-up or wind-off and which provides a frictional force upon thread 1. Furthermore, the arrangement includes an actuator 13 for applying a frictional force applied by thread brake 1 to thread 1 may be controlled. Preferably included is a piezoelectric sensor 14 which may be deformed by the force applied by the thread to the sensor 14. In the prior art, the actuator comprises a setting nut and a spring whose operation is time-consuming. In order to simplify the operation of the actuator 13, in accordance with the present invention, the preferred actuator 13 is piezoelectrically deformable element which is constructed as a unit with sensor 14 and is so connected with the movable portion 8 of the thread brake 5 that the deformation movement of the actuator can be transferred to the movable portion 8 of thread brake 5 and the sensor 14.

REFERENCES:
patent: 3650717 (1972-03-01), Canfield
patent: 3688958 (1972-09-01), Rydborn
patent: 4880175 (1989-11-01), Yamauchi et al.
patent: 4884763 (1989-12-01), Rydborn
patent: 5056734 (1991-10-01), Uchida et al.

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