Push-in closure

摘要

This relates to a closure for containers, particularly containers such as containers for beverages and the like which are packaged under pressure. The closure includes an outer retaining ring portion and an inner sealing plug portion which are preferably initially molded as a unitary product, but wherein the sealing plug portion is connected to the ring portion primarily by a rupturable connecting line. The retaining ring portion is interlocked with an extreme end of the neck finish of a container and the sealing plug portion is interlocked in sealing relation with an internal shoulder of the container neck finish, which shoulder defines a pour opening. The sealing plug portion is retained in association with the retaining ring portion by a hinge strap which is elongatable under tension. The sealing plug portion is also provided with a vent opening which is normally closed by a vent valve which is held in its closed position by internal pressure and which is movable manually to a vent position. The closure is opened by first depressing the vent valve to open the same and by continuing the pressure thereon to effect rupture and separation of the sealing plug portion from the retaining ring. When the sealing plug portion is pressed into the interior of the container, it wedges within the pour opening and retains its open position. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.