Patent ID: 7134308

Claim:
An extruder tool for producing a plastic cylindrical extrusion having at least one inner bore comprising: (a) an extruder nozzle having a tapered region and an opening piece having a cylindrical channel; (b) a carrier support having a number of filaments secured to said carrier support, the number of filaments corresponding to a number of inner bores to be produced, or having a number of channels corresponding to the number of inner bores to be produced for pressing a volatile filling material into an extrudable material as the material is being extruded, said carrier support comprising a number of radially adjustable carrier elements corresponding to the number of inner bores to be produced, each carrier element being secured to the extruder nozzle near the opening piece or in the tapered region; and (c) a sensor for determining a spacing of the at least one inner bore from an outer surface of the extrusion, said sensor outputting signals to a setting unit for radial adjustment of the carrier elements in dependence on the spacing determined by the sensor.