| 摘要 |
The disclosed invention is a plastic liner cap in a two-piece closure on containers for beer, carbonated beverages and the like. The liner cap top panel over the mouth area of the container includes a vent means comprised of an annular channel formed in the cap and a series of spaced vertical slits disposed annularly in the channel. An outer cap of metal includes a tear strip for hand removal of the closure. When the tear strip is initially ruptured, pressure is released through the vent slits and conveyed through the initial rupture of the tear strip. Axial flexing movement of the liner opens or closes the vent slits. The vent means assures positive venting on opening the closure and allows capping of the two-piece closure on the container without registering or orientation of the vents and the tear strip. The liner cap is usable as an independent reclosure device after the container is opened. A second embodiment provides a seal of liner and overcap adjacent the opposite margins of the channel. This minimizes space between the liner and overcap for product to collect and cause a reaction before the container is opened.
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