| 摘要 |
The invention relates to a device (1) for exposing a mass (3) stored in a container (2). Disposed in container (2) is a conventional follower piston (5), the dispensing opening (4) of container (2) being closed by a removable closure cap (11). For generating a vacuum between mass (3) and closure cap (11) there is provided a circumferential gasket (15) disposed between an outer wall portion (9) of container (2) and closure cap (11). For avoiding early wear of this circumferential gasket (15) and the resultant loss of its sealing properties, the invention provides that on removal of the closure cap (11) the circumferential gasket (15) is positively forced into sealing engagement with the outer wall portion (9) of the container (2) by a force generated by the removal of the closure cap and acting in the direction towards said outer wall portion.
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