Patent ID: 7458799

Claim:
A tapered hollow pole extruder comprising: a) an extrusion mold housing with a plastic material supply inlet; b) a mold bead comprising: i) a cylindrical cam sleeve comprising a plurality of circumferential grooves on the inner surface of said cylindrical cam sleeve; ii) coordinated arms that are rotatable within the mold head and that define a periphery of an extrusion aperture, wherein each of said coordinated arms comprises a plurality of teeth that are adapted to engage said circumferential grooves; and iii) a tapered mandrel that is moveable within the mold head and defines a blockage in a central portion of the extrusion aperture; in which movement of said cylindrical cam sleeve along its longitudinal axis effects rotation of the coordinated arms, and the periphery of the aperture varies in size depending on rotation of the coordinated arms within the mold head, and the blockage of the central portion of the aperture varies in size depending on the movement of the tapered mandrel within the mold head.