Plastic molding
AssigneePhillips Petroleum Company
InventorsLarry P. Mozer, Bill T. Morgan
Life of this patent
Estimating the term…
Abstract
A die ring for use in a blow molding apparatus is provided with depressions at the downstream end of the land to provide the parison with a longitudinally thickened rib and depressions at the upstream end of the land to counteract parison deformation caused by the downstream depressions.
Claims7
A parison having a longitudinal axis and a cross-section, in a plane normal to the longitudinal axis, characterized by a pair of opposed first lobes and a pair of opposed sets of second lobes positioned about normal to the pair of opposed first lobes, each of the opposed pair of the second lobe sets comprising a plurality of second lobes.
Dependencies are inferred from the claim text.