FIG. 1 is a plan view of a heated platen for liquifying thermoplastic materials;

FIG. 2 is a side elevational view of the heated platen as oriented in FIG. 1, wherein the front, rear, and side views are all substantially identical;

FIG. 3 is a bottom plan view of the heated platen, rotated 180 the orientation of FIG. 1; and,

FIG. 4 is a cross-sectional view, taken along line 4--4 of FIG. 3.