Patent ID: 9394072
Filing Date: 2016-07-19
CPC Classification: B65D

Claim Text:
1. A plastic container comprising: an upper portion having a mouth defining an opening into the container; a base movable to accommodate vacuum forces generated within the container thereby decreasing the volume of the container, the base including: a contact ring that supports the base upright, an upstanding circumferential wall extending from the contact ring towards the upper portion, a central push-up portion at an axial center of the base, and an inversion ring extending between the upstanding circumferential wall and the central push-up portion; wherein the inversion ring is flexible and configured to: move away from the upper portion upon filling of the container; and move towards the upper portion due to vacuum forces within the container upon capping, sealing, and cooling the container, thereby moving the inversion ring from a convex shape relative to an exterior of the base to a generally straight shape; a plurality of triangular surface features included on the inversion ring configured to increase flexibility of the inversion ring in order to adsorb vacuum forces as the inversion ring moves towards the upper portion from the convex shape to the generally straight shape, the plurality of triangular surface features are confined to the inversion ring and spaced apart from the central push-up portion and the upstanding circumferential wall; wherein neighboring triangular features share a common sidewall; and a substantially cylindrical portion extending between the upper portion and the base.