the assembly point p and a winding step in which the packing 14 is wound starting from the assembly point p into a coil in the machine 1 described above the braiding step is effected in an entirely conventional manner by the movement of the movable elements 9 which causes the strands 5b to interlace with the core yarns 5a coming from the reels 4 and by the simultaneous traction exerted by the forced rotation of the roll 15 both on the strands 5b and on the core yarns 5a which unwind respectively from the spools 10 and the reels 4 which are free to rotate in their seats all the elementary yarns 5 namely both the core yarns 5a and the strands 5b meet at the assembly point p to form the packing 14 the winding step occurs at a winding diameter d as a result of the location of the assembly point p on the surface 15 39 of the rotary roll 15 as a result of this rotation those core yarns 5a and strands 5b which at the assembly point are further from the surface 15 39 of the roll 15 or on the extrados surface of the packing 14 are drawn at.