Convenience opening of containers for liquid products

摘要

An easy opening closure for pressurized fluids and a method of making the same. The container has an end panel with multiple small openings and a tape strip of plastic or plastic coated metal foil is secured to the panel by a heat activated adhesive in a way by which the plastic is extruded into the openings to form hollow bosses each defined by a peripheral annulus or torus formed into the respective opening and at least partially bonded to an uncoated raw edge of the opening, the boss having a disk-like center portion and the surrounding annulus providing a thick cross-section resisting doming of the areas of the tape covering the openings and inhibiting the development of incipient cracks and their propogation resulting in premature peeling of the cohesive bond. The areas of adherence of the adhesive to the external side of the panel are selectively controlled to obtain a desired, preferably uniform, peel resistance to the tape so that upon the tape being pulled by the user to separate it from the container during opening, the user will continue to pull to fully open the pour opening and vent. The invention also provides a permanent securement of the tail end of the strip to the end panel to prevent removal of the strip.