discussed in connection with special forms of embodiment of the support belt 20 with reference to fig8 to 10 alternatively or additionally further surface structures can also be introduced into this outer surface 50 the profiling or structuring of the first outer surface 50 of the support belt 20 in that case is carried out in advantageous manner during the embedding step of the at least one tensile carrier 42 in the first belt layer 46 according to a preferred alternative method in the said embedding step the part belt 66 is extruded with an unprofiled plane forming the first outer surface 50 of the support belt 20 after the subsequently described second production step the support belt 20 is so re processed in a separate further production step that it has the afore mentioned ribs extending in longitudinal direction of the support belt advantageously this re processing of the support belt is carried out by grinding with profiled grinding discs which are particularly suitable for grinding elastomeric materials the removed material is in that case sucked away and recycled in an advantageous development of the invention the first molding wheel 56 or its circumferential surface is constructed in such a manner that the connecting surface 52 of the part belt 66 is provided with a surface structure during the embedding step as indicated in fig6 preferably at least the sections of the connecting surface 52 between the tensile.