| 摘要 |
A dispenser comprising a valved aerosol container and a unitary flexible barrier member having a wall portion terminating in sealing means, which sealing means is joined to the container in either a top seal or bottom seal relationship. The wall portion has first and second wall portions, the first wall portion terminating in a central piston region and the second wall portion terminating in a sealing flange, the wall portion being steeply frusto-conical and sufficiently thick and rigid to be free-standing before incorporation into a container. The barrier is nestable with like barriers.
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