Abstract: A method for automatically regulating a thread tension in a bobbin-winding machine having a lower pirn, an upper bobbin, and thread-tension devices, wherein during the entire time thread unwound from the lower pirn is collected on the upper bobbin in formation, the thread-tension devices press on the thread between the lower pirn and the upper bobbin with a pressure action controlled on the basis of a winding speed value of the thread.

Abstract: A method and apparatus serves to wind yarn on a forming bobbin driven by a grooved drive roller in a collection station, in such a manner as to prevent ribbing during the continuous superposing of the various layers of winding, hence rendering the subsequent technical operations to be undergone by the bobbin yarn both possible and simple. The apparatus includes a control unit having a keyboard, a mini-computer and a motive source which angularly positions the bobbin carrier arm such that the collection station operates in regions not in proximity with regions undergoing a ribbing effect.

Abstract: A method and device for winding yarn into bobbins, in an automatic winding machine in which the yarn is cut on command so that the cut end is wound onto the central portion of the surface of the bobbin under formation, in order to facilitate restoration of yam continuity and restarting of winding.