US Patent 8979524 Method and apparatus for making a light weight container

An apparatus for forming a blow-molded container includes a mold, a mandrel, and a die. The mold includes a bottom section for forming a container bottom, a sidewall section for forming a plurality of sidewalls, a spout section for forming a spout, and a neck section for forming an upwardly converging neck member coupling the sidewalls to the spout having a convex radius transition section of approximately three inches in a container having an overall height of approximately ten inches. The mandrel and the die are operative to form a parison that assumes an ovoid cross-section within the mold with the outer surfaces of the parison positioned approximately equidistant from sidewall section of said mold.