| 摘要 |
A valve assembly has a spout having a central opening in communication with an interior of the bag, and a circumferential interior sidewall. There is a sliding valve disposed within the central opening, the sliding valve having an open position wherein contents of the bag can flow through the valve, and a closed position, where the valve is sealed against the interior sidewall of the spout. There is a valve actuator connected to a dispensing apparatus. The valve actuator moves the sliding valve from a closed position to an open position when the spout is placed on the actuator, and the actuator moves the sliding valve from an open position to a closed position when the spout is removed from the valve actuator. The sliding valve remains in its set open or closed position until it is moved by the actuator. This arrangement prevents leakage of the container when the container is not being used in a dispensing apparatus.
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