| 摘要 |
The present invention relates to a cover composed of two partially separated films, for leaktight closure of receptacles, and methods for assembling such a cover. Cover characterised in that it comprises two films 1 and 2 which are single-layer or multilayer, solidly attached together by adhesive bonding or heat-sealing only at the zone 3 provided for the welding or sealing of the said cover onto the receptacle 4, the upper film 1 allowing a penetration of air, or the welding between the two films 1 and 2 being partial and the lower film 2 being perfectly leaktight. <IMAGE> |
