| 摘要 |
An improved nozzle assembly for manually actuated foam generating and dispensing units in which a tapered bottle cap fitted at its interior end with a dip tube subassembly, is provided with a movable porous element which, upon discharge of foam from the dip tube subassembly, effects a further reduction in bubble size in the foam thereby to provide a stiffer and more consistent foam. The movable porous element floats in the nozzle between a position of seating against the tapered internal nozzle surfaces and a retracted position allowing air to return about the member back to the interior of the generating and dispensing unit.
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