BASE FOR PLASTIC CONTAINER BASE FOR PLASTIC CONTAINER BASE FOR PLASTIC CONTAINER

摘要

A moulded polymeric container (10) includes a body portion (12) having a sidewall (18) and an integral champagne type base (16). The base (16) includ es a lower end (20) that defines an annular contact ring (22) for supporting th e container (10) with respect to an underlying surface. An annular step ring (24) is defined immediately radially inwardly of the annular contact ring (2 2) and has a radial length LS. The base (16) further has a central push-up area (26) and a generally concave transition region (28) interposed between the central push-up area (26) and the annular contact ring (22). The transition region (28) further includes a plurality of integrally moulded radially extending ribs (30), each of the ribs (30) having a length LR. According to one advantageous aspect of the invention, the ratio LR/LS is within a range of about 1.0 to about 4.0.