| 摘要 |
A closure cap for a container has a mounting part mounted on the container neck with a closure element over the container opening surrounded by small openings, and a movable part for covering the openings around the closure element when it is moved from an opened to a closed position. The movable part has a passage formed by walls in the shape of a truncated cone defining an external orifice of small openings of a given open area and an internal orifice of a larger open area which is recessed inwardly from the external orifice. The difference in orifice area creates a suction force to suck fluid back into the orifices when the container is returned to the upright position.
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