| 摘要 |
<p>A valve for use primarily for dispensing liquids from non-reusable containers comprising a conduit (3, 4) formed by bonding a flexible sheet (1) of thermoplastics material to a second sheet (2) of resilient thermoplastics material. The second sheet is of a springy nature and is provided with a shoulder portion (8, 9) directed to the first sheet. The shoulder portion is positioned adjacent to a deformable member (7) formed into the second sheet. The conduit is closed by the first sheet being stretched tightly over the shoulder. However by deforming the deformable member towards the first sheet the latter is raised from the shoulder thereby opening the conduit.</p> |
