A process for producing elongated profile members made of thermoplastic synthetic resins having a coating over at least a portion of their circumference of at least one additional thermoplastic polymeric material which includes the steps of extruding a coating of a thermoplastic secondary material, simultaneously...http://www.google.fr/patents/US4204821?utm_source=gb-gplus-shareBrevet US4204821 - Process and apparatus for the extrusion of coated skein-shaped profiles, preferably of thermoplastic synthetic resins
Process and apparatus for the extrusion of coated skein-shaped profiles ...
