| 摘要 |
<p>A plastic container having a base portion (20) adapted for vacuum pressure absorption. The base portion including a contact ring (34) upon which the container is supported, an upstanding wall (44) and a central portion (36). The upstanding wall being adjacent to and generally circumscribing the contact ring. The central portion being defined in at least part by a central pushup (40) and an inversion ring (42) which generally circumscribes the central pushup. The central pushup and the inversion ring being moveable to accommodate vacuum forces generated within the container.</p> |
