| 摘要 |
<p>A fluid dispenser (D) for use at the bottom of a container (C) includes a base member having therein a vent (24) providing an air passage controlled by a valve (28), and a fluid dispensing passage (16) also controlled by a valve (46). The exterior air vent tube (32) and exterior dispensing tube (16) of the dispenser are usually sealed until the first use of the dispenser. The dispensing action is carried out by pressing a deformable portion of the container or supplying pressurised gas to the container thereby increasing the pressure within the container, and in the normal position of the container with the dispenser at the bottom thereof. Where an air/fluid contact is to be precluded, a bladder may be placed within the container, having fluid communication with the air passage, for expansion and pressure equalization as the dispensing action continues. <IMAGE></p> |
