wires 6 the lower fabric 2 in turn is a double layer with longitudinal wires 4 and upper transverse wires 7 and lower transverse wires 8 the lower tranverse wires 8 have long floats on the running side so that in case of a flat woven papermachine screen a so called weft runner is realized the lower fabric 2 can be a 10 harness weave in order to avoid paper marks the transverse wires 6 of the fabric 1 and the upper transverse wires 7 of the fabric 2 are of equal thickness amd are made of the same material the longitudinal wires 3 of the fabric 1 are preferably thinner and are made of a more elastic material than are the longitudinal wires 4 of the fabric 2 this is possible since the longitudinal wires 3 of the fabric 1 serve primarily to form the paperside of the screen while the fabric 2 like a transmission belt serves to take up the entire driving load in the paper forming section of the paper machine typically the longitudinal and transverse wires may comprise polyester filaments also the longitudinal wires and particularly the transverse wires of the lowermost fabric may also comprise polyamide filaments on account of the higher wear resistance of these filaments in accordance with the principles of the present invention and in order to obtain as firm a connection between the fabrics 1 and.