| 摘要 |
An elastically deformable shutter has a first portion attached to a fixed wall of a dispenser head, a second portion attached to a drive member, and a third portion between said first and second portions. The deformable shutter in an open configuration enables substance in a receptacle to flow towards the dispenser orifice. In a closed configuration, the substance is prevented from flowing towards the dispenser orifice. A third portion bears against a wall of the dispenser head in the closed configuration. Passage from one configuration to the other is induced by an action other than pressure from substance in the receptacle.
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