| 摘要 |
A cap for sealing the top opening of a fluid-carrying vessel, the vessel having an upstanding narrow neck with a central opening leading into the vessel, the neck of the type wherein it is surrounded by a short, thickened border of circular periphery about the opening, the cap including a substantially non-flexible top cap portion for positioning transversely atop the neck of the vessel to cover the central opening therein, the top cap portion defined by an outer perimeter, extending beyond the periphery of the border, and spaced-apart top and bottom surfaces, a circular, flexible bottom cap portion, adapted to extend about the outside of the neck of the vessel, a flexible center band joining the top cap portion and the bottom cap portion, extending about the neck of the vessel below the border thereof and having an outer perimeter substantially less than the respective perimeters of the top cap portion and the bottom cap portion and to form a groove therebetween, a planar, stretchable cinch ring surrounding the neck of the vessel for location in the groove, and a lever defined by first and second spaced-apart terminal ends engaging the cinch ring between the terminal ends and moveable between a first position wherein the cinch ring is relaxed in the groove and a second position wherein the cinch ring is tightened against the groove to seal the cap tightly about the neck of the vessel.
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