Stretch blow molded oblong or oval container
AssigneeContinental PET Technologies, Inc.
InventorsSuppayan M. Krishnakumar, Wayne N. Collette
Life of this patent
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Abstract
This relates to the stretch blow molding of containers having bodies of oblong or oval cross section starting with an injection molded plastic preform. First there is the discovery that the preform does not axially stretch evenly as occurs with circular or generally circular cross sectional container bodies but includes a lesser stretching at the center of sides of such container bodies. Having made this discovery, it is proposed to provide such containers with oval or oblong cross sectional bodies with radially inwardly directed ribs wherein the ribs conform to the differential in axial stretching of the material of the preform.
Claims13
A stretch blow molded plastic container comprising an open top, a closed bottom and a tubular body, said tubular body being of an oval or oblong cross section and including wide sides and narrow ends, said body being axially elongated and stretched in a hoop direction, and the axial elongation of said body being a minimum in central portions of said sides and a maximum in said ends, and planar transverse lines formed on a preform of said container appear as upwardly arched lines on said sides.
A stretch blow molded plastic container comprising an open top, a closed bottom and a tubular body, said tubular body being of an oval or oblong cross section and including wide sides and narrow ends, said body being axially elongated and stretched in a hoop direction, and the axial elongation of said body being a minimum in central portions of said sides and a maximum in said ends, said container having a radially inwardly directed rib molded into at least one of said sides with said rib being arched upwardly.
Dependencies are inferred from the claim text.