Patent ID: 8382023

Claim:
A device for the constant tension feeding of elongate feed selected from the group consisting of threads, yarns and metallic wires, said threads or yarns fed to a textile machine or a winding machine or said metallic wire fed to a similar machine for working on the metallic wire, said machine to produce a manufactured product or to process the respective thread or yarn or wire, comprising: tension detecting means, thread or yarn or wire, respectively, accumulating means, control means connected to said detecting means and said accumulating means, said accumulating means and said control means connected to said detecting means and said accumulating means are provided to intervene on the accumulating means based upon a tension value of the elongate feed obtained from said detecting means, as said feeding taking place in a discontinuous way that is with phase sequences wherein the thread or yarn or wire motion takes place with at least a first and at least a second feeding or absorption state by the machine different therebetween, said states following each other in time, a separate compensating means arranged between said accumulating means and said tension detecting means to cooperate with such thread or yarn or wire to compensate a variation of the feeding or absorption state of the thread or yarn or wire upon the passage between each first and each second feeding or absorption state following the first one, this allowing the control means to intervene onto the accumulating means to modify the action thereof onto the thread or yarn or wire and to keep constant in time the tension value detected by the detecting means at a set value, said constant tension value being kept also during the changing phase of the feeding state thanks to the interaction between said thread or yarn or wire and said compensating means, the compensating means being able to move freely under the action of the thread or yarn or wire with respect to a resting position.