| 摘要 |
A device for forming an arrangement suitable for venting a package, said arrangement comprising a deformable valve element E joined to packaging material S which is tensioned over said element and has a vent opening a closable by said element, comprises a tool F, having a punch P, which in movement towards a frame D stresses the valve element from a relaxed state, as illustrated by element E', to a deformed state, as illustrated by element E, joins, eg by heat sealing or gluing, the deformed element E to the packaging material S in areas Z, and punches said vent opening a. <IMAGE> |
