| 摘要 |
<p>The invention relates to valves for controlling the dispensing of liquids from a flexible plastic bag that is disposed in a box of corrugated board. Prior art devices have failed to provide a valve that is easily actuated yet capable of being locked in a non-use position and constructed to reduce oxygen permeation into the bag. The instant invention overcomes these disadvantages by providing a lockable slide valve that includes a sealing arrangement to reduce oxygen permeation. The invention includes a dispensing valve made as a separate unit to be mounted on a flexible bag (B) disposed in a box (C) and including a slide valve member (21) slideably disposed in a guide sleeve member (20) for axial movement between closed sealing position and opened dispensing position. A locking arrangement (31, 40, 42) is provided for keeping the slide in fully closed position and to prevent the slide from being accidentally opened. It also includes a sealing arrangement (36, 37, 38) at the outer end of the slide member (21) and guide sleeve (20) for sealing the slide member (21) and guide sleeve member (20) to facilitate gripping by the fingers to push the slide member into closed position in the guide sleeve member (20). </p> |
