Abstract: One belting end 12 is joined to an adjacent belting end 13 using the apparatus shown in FIG. 3. The belting comprises a body element and a longitudinally extending constraining element embedded in the body element.The ends 12 and 13 are preferably shaped as shown in FIG. 4 and are pressed by the apparatus against opposite faces of a heating element 21. The application of heat and pressure causes the ends of the constraining element to be displaced transversely with respect to their associated body elements, the displacement of one end taking place in the opposite direction to the displacement of the other end so that in the finished joint the ends of the constraining element form an overlapping joint embedded in the fused material of the body element.