| 摘要 |
<p>- A vacuum valve for a container, produced as a single piece of plastic material and comprising a base (1) delimiting an orifice (2) and a stopper (3) intended to close the said orifice (2) and attached to the said base by means of a connection tongue (4) joined to the periphery of the said base. - This valve is characterised in that the said base (1) comprises a peripheral zone (5) which is provided in order to be welded onto the said package, and in that that part of the said peripheral zone (5) which is covered by the said connection tongue, folded over when the stopper is housed in the said orifice (2), comprises a recess (24) enabling the corresponding part (4A) of the said connection tongue (4) to be received at least partially therein. - Production of a weldable valve which is simple and easy to manufacture. <IMAGE></p> |
