| 摘要 |
A creel for supplying cords or wires to a calender, in which the tension in each individual cord is controlled by a pump-motor device capable of pumping an energy medium such as air to a storage chamber while exerting a braking effort on the spool from which the cord is unwound and of rotationally reversing to act as a motor driven by air from the chamber to rewind such cord if broken, or to retension the cord should it become slack.
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