Patent ID: 7017763
Filing Date: 2006-03-28
Classification: B65D

Abstract:
1. A non-round base structure for a blow-molded container having rectangular sidewalls, comprising: a support heel comprising a bearing edge and a flexible vacuum absorbing area having an outer portion and a roughly ellipsoidal inner portion, said outer portion merging with the container rectangular sidewalls and said inner portion merging with a central concave wall; the central concave wall having an apex and a plurality of ribs extending outward from the apex along the concave wall, each rib having a rounded edge extending outward from the interior of the container; and whereby the vacuum absorbing area and ribs cooperate to enhance the structural integrity of the container by rigidifying said central concave wall and by providing multiple paths of interengageable surfaces that make it difficult for deflection, once initiated, to propagate to undesired distortion.