| 摘要 |
The dispensing device is constituted by an elastic porous membrane 1 whose pores have, in the rest state, a size 2 rendering this membrane 1 leaktight with respect to the product contained in a container provided with a dispensing opening and whose internal pressure may be increased in any appropriate manner and, under the effect of an internal excess pressure, a size 2', 2'', 2''' sufficient to convert the pores into dispensing passages for the product, the said membrane 1 being applied and fixed to the dispensing opening by any appropriate means such as gluing or heat-welding. <IMAGE>
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