Patent ID: 6994821

Claim:
An extrusion head assembly for a vertical rotary blow molding machine using molds having radially inner and radially outer mold cavities; the assembly comprising a body having an outer side; a first extrusion head in the body, the first extrusion head having a first head annular flow passage and a first head mouth opening in the direction of rotation of the wheel for extruding a first parison for capture in inner mold cavities; a second extrusion head in the body, the second extrusion head having a second head annular flow passage and a second head mouth opening in the direction of rotation of the wheel for extruding a second parison for capture in outer mold cavities, the second extrusion head located outwardly of the first extrusion head and between the first extrusion head and the outer side of the body; a first resin passage in said body, said first resin passage extending from an inlet end at the outer side, into the body, past the second head flow passage, and to the first head flow passage; and a second resin passage in said body, said second resin passage extending from an inlet end at the outer side of the body, into the body and to the second head flow passage.