Abstract: A method of extrusion for the production of a plastic band profile with reinforcing profiles disposed and enclosed at right angles to the longitudinal axis of the band, arranged at a distance one from the other whereby two streams of plastic are brought together at a sharp angle to the longitudinal axis of extrusion and where the profiles are uniformly pushed from behind and in the direction of extrusion into the region of the angle where the two streams meet and where they are enveloped and taken with the plastic streams and extruded into the shape of the band profile. The two plastic streams are produced independently one from the other in two parallel planes one lying above the other and with respect to their flow parameters are independently controllable one from the other.