| 摘要 |
TENSIONING DEVICE FOR A THREAD, TAPE OR THE LIKE UNREELED FROM A REEL Tensioning device for keeping constant the tension of a thread, tape or the like unreeled from a reel, including a friction disk acting directly on a rotating element which is kinematically connected to the reel, an internally threaded bush rigidly connected to the friction disk and freely screwed upon the rotating element supporting shaft, and an adjustable biasing spring connected to the friction disk for opposing a rotation thereof which spaces the friction disk from the rotating element.
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