| 摘要 |
A removable stopper for sealing elongated openings in any container wall. It is particularly adapted for use in all of the several different beverage can and pull tab opener combinations now available on the market. Essentially the stopper consists of a lever, fulcrum and hook structure in combination with a sealing surface. The latter can be positioned within the can and forced up against the bottom surface of the top of the can by actuation of the lever until the seal is established and the hook is attached to the bulging rim around the top of the can. The advantages of this configuration are that one stopper can be used for all of the different pull-tab-type of elongated openings, that the use of the mechanical advantage of the lever creates a tighter seal than might otherwise be possible, and that any pressure buildup which may develop in the can contributes to, rather than detracts from, the sealing of the container.
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