Abstract DRAWING 1. A PROCESS FOR PRODUCING A MOLDED, HALLOW, ORIENTED, THERMOPLASTIC ARTICLE FROM A THERMOPLASTIC SLUG HAVING A HOLLOW CENTER AND HAVING AT LEAST ONE OPEN END COMMUNICATING WITH THE HOLLOW CENTER COMPRISING: (A) PLACING THE SLUG IN AN EXTRUSION CHAMBER; (B) EXTRUDING THAT PORTION OF THE SLUG TO BE ORIENTED BY ADVANCEMENT IN ITS AXIAL DIRECTION INTO AN ANNULAR EXTRUSION DIE ORIFICE, WHICH DIE ORIFICE IS CONVERGENT IN ITS CROSS-SECTIONAL AREA IN THE DIRECTION OF EXTRUSION AND EXTRUDES THE SLUG WALLS OUTWARDLY, INTO A MOLD CAVITY, TO A SHAPE RELATIVELY LARGER THAN THE ORIGINAL SHAPE OF THE SLUG, THE EXTRUDED SLUG WALLS BEING WITHIN THE ORIENTATION TEMPERATURE RANGE; AND, WHILE THE EXTRUDATE IS WITHIN THE MOLD CAVITY AND WITHIN ITS ORIENTATION TEMPERATURE RANGE, AND AS EXTRUSION OF THE SLUG CONTINUES, SIMULTANEOUSLY (1) DRAWING THE EXTRUDATE BY EFFECTING RELATIVE SLIDING MOVEMENT BETWEEN THE MOLD AND THE EXTRUSION ORIFICE; AND (2) EXPANDING THE EXTRUDATE TOWARD THE MOLD WALL BY FORCING A FLUID AGAINST THE IINTERIOR OF THE EXTRUATE; AND (C) COMPLETING EXPANSION OF THE EXTRUDATE AGAINST THE MOLD WALL.
A PROCESS FOR PRODUCING A MOLDED, HALLOW, ORIENTED, THERMOPLASTIC ARTICLE FROM A THERMOPLASTIC SLUG HAVING A HOLLOW CENTER AND HAVING AT LEAST ONE OPEN END COMMUNICATING WITH THE HOLLOW CENTER COMPRISING: (A) PLACING THE SLUG IN AN EXTRUSION CHAMBER; (B) EXTRUDING THAT PORTION OF THE SLUG TO BE ORIENTED BY ADVANCEMENT IN ITS AXIAL DIRECTION INTO AN ANNULAR EXTRUSION DIE ORIFICE, WHICH DIE ORIFICE IS CONVERGENT IN ITS CROSS-SECTIONAL AREA IN THE DIRECTION OF EXTRUSION AND EXTRUDES THE SLUG WALLS OUTWARDLY, INTO A MOLD CAVITY, TO A SHAPE RELATIVELY LARGER THAN THE ORIGINAL SHAPE OF THE SLUG, THE EXTRUDED SLUG WALLS BEING WITHIN THE ORIENTATION TEMPERATURE RANGE; AND, WHILE THE EXTRUDATE IS WITHIN THE MOLD CAVITY AND WITHIN ITS ORIENTATION TEMPERATURE RANGE, AND AS EXTRUSION OF THE SLUG CONTINUES, SIMULTANEOUSLY (1) DRAWING THE EXTRUDATE BY EFFECTING RELATIVE SLIDING MOVEMENT BETWEEN THE MOLD AND THE EXTRUSION ORIFICE; AND (2) EXPANDING THE EXTRUDATE TOWARD THE MOLD WALL BY FORCING A FLUID AGAINST THE IINTERIOR OF THE EXTRUATE; AND (C) COMPLETING EXPANSION OF THE EXTRUDATE AGAINST THE MOLD WALL.
Claim 2
Dependent Claim
176 words
A PROCESS FOR PRODUCING A MOLDED, HALLOW, ORIENTED, THERMOPLASTIC ARTICLE FROM A THERMOPLASTIC SLUG HAVING A HOLLOW CENTER AND HAVING AT LEAST ONE OPEN END COMMUNICATING WITH THE HOLLOW CENTER COMPRISING: (A) PLACING THE SLUG IN AN EXTRUSION CHAMBER; (B) EXTRUDING THAT PORTION OF THE SLUG TO BE ORIENTED BY ADVANCEMENT IN ITS AXIAL DIRECTION INTO AN ANNULAR EXTRUSION DIE ORIFICE, WHICH DIE ORIFICE IS CONVERGENT IN ITS CROSS-SECTIONAL AREA IN THE DIRECTION OF EXTRUSION AND EXTRUDES THE SLUG WALLS OUTWARDLY, INTO A MOLD CAVITY, TO A SHAPE RELATIVELY LARGER THAN THE ORIGINAL SHAPE OF THE SLUG, THE EXTRUDED SLUG WALLS BEING WITHIN THE ORIENTATION TEMPERATURE RANGE; AND, WHILE THE EXTRUDATE IS WITHIN THE MOLD CAVITY AND WITHIN ITS ORIENTATION TEMPERATURE RANGE, AND AS EXTRUSION OF THE SLUG CONTINUES, SIMULTANEOUSLY (1) DRAWING THE EXTRUDATE BY EFFECTING RELATIVE SLIDING MOVEMENT BETWEEN THE MOLD AND THE EXTRUSION ORIFICE; AND (2) EXPANDING THE EXTRUDATE TOWARD THE MOLD WALL BY FORCING A FLUID AGAINST THE IINTERIOR OF THE EXTRUATE; AND (C) COMPLETING EXPANSION OF THE EXTRUDATE AGAINST THE MOLD WALL.