| 摘要 |
<p>A dispenser comprises a housing, a product-containing bag (56) disposed within the housing, and a valve (54) for discharging product from the bag (56). An energy-storing member, in the form of a gas-filled bellows (80), or a cellular foam element (200), is disposed beneath the product-containing bag (56) and is raisable thereagainst to pressurize the product within the bag. An overload preventing mechanism (32,34,94) prevents energy-storing member (80) from being excessively compressed. The valve (54) and product-containing bag (56) are removable as a unit from the housing to enable an identical refill unit to be installed.</p> |
