Patent ID: 6378193
Filing Date: 2002-04-30
Classification: B21C,Y10T

Abstract:
A process for manufacturing a flexible continuous tube from two spiral wires whose T-shaped or U-shaped cross-sections comprise lateral bosses at a base of the U or a stroke of the T, the two wires being arranged in relation to one another so that the bosses of one wire face the bosses of the other wire, stapling being performed by partial overlapping of one wire over another wire, comprising:injecting each wire into independent bending means comprising of at least three rollers arranged in relation to one another so that the wire, after bending, has the shape of a spiral of determined diameter and pitch, adjusting the rate of injection of each wire according to the real length of each wire for the same number of turns, arranging each bending means in relation to one another so that the turns of the wires are coaxial and that the wires, once bent, cross each other to perform stapling by means of an elastic deformation in the radial and longitudinal direction.