Abstract: The invention relates to a bending or helix-forming apparatus operating by partial but continuous rolling of a long product on a resilient rim portion of a driven rotatable drum, to which portion it is applied by a plurality of rollers having axes parallel to that of the drum, with a pressure sufficient such that its adherence to the said resilient rim portion of the drum ensures that it is positively driven by the latter.

Abstract: The invention relates to a device for the continuous treatment of a semi-worked filamentary of strand-like metal material of indefinite length, arranged helically, of which the turns, supported and driven by rotating horizontal shafts, are immersed in a treating agent.An apparatus of this kind comprises two capstans or winches fitted with idle satellites or rollers; two strands of material coming from delivery units are bent thereon and assume the shape of two helices supported and driven respectively by pairs of horizontal shafts, and immersed in a treatment agent contained in a tank. The two helices rotate in opposite directions their turns interpenetrating, so that they guide each other; the size of each turn is regulated at the same time, if it increases, by its possible contact with one of the shafts bearing the other helix, and by the distance, adjustable during operation, between the two shafts of the pair bearing it.