초록 ▼

A plastic container having a reinforcing ring in its base to strengthen the base. The ring reinforces the base to prevent deformation of the base which would result in an unstable container and also reduces the potential for stress cracking found in one-piece containers having reinforcing ribs in th

A plastic container having a reinforcing ring in its base to strengthen the base. The ring reinforces the base to prevent deformation of the base which would result in an unstable container and also reduces the potential for stress cracking found in one-piece containers having reinforcing ribs in the base structure. The reinforcing ring has a weight that is less than the weight of a typical base cup used to provide a supporting surface for a two-piece composite bottle. The ring is attached to the base portion of the container by one of three methods: molding the reinforcing ring into the base; providing a ring and a base which snap fit together, or adhesively bonding the ring to the base of the container. When the contianer is filled with a carbonated beverage, the pressure within the container acts to maintain the ring in an assembly relation with the container base in which the ring reinforces the base and acts to maintain the structural integrity of the base by resisting eversion of the base.

대표청구항 ▼

A plastic container for carbonated liquid having a tubular side wall and a base structure merging with a lower end portion of the side wall, said base structure comprising: a bottom wall extending downwardly from said side wall and closing said container, said bottom wall having a raised center port

A plastic container for carbonated liquid having a tubular side wall and a base structure merging with a lower end portion of the side wall, said base structure comprising: a bottom wall extending downwardly from said side wall and closing said container, said bottom wall having a raised center portion forming an annular heel portion at the periphery of said center portion; said center portion having an upwardly extending annular recess adjacent to and radially inwardly of said heel portion; and an annular reinforcing ring seated in said recess, said recess being configured to engage and encapsulate a portion of said ring, said bottom wall being flexible so that when said container is filled with said carbonated liquid, the bottom wall forming said recess is forced against said ring to secure said ring to said bottom wall, said ring strengthening said bottom wall to resist eversion of said raised center portion.