Verfahren zum wasserdichten Verschliessen eines nicht-metallischen Behälters mittels eines nicht-metallischen abziehbaren und wiederverwendbaren Deckels

摘要

The method for sealing a non-metallic container with a non-metallic cover (lid), in which a liquid-tight (leaktight) sealing surface is formed by compressing, between two jaws, at least one of which is equipped with a sealing means, is characterised in that the sealing means is a generator of ultrasound and in that the energy dissipated over the sealing surface is controlled by the supply of a predetermined quantity of energy so as to obtain a cover which is peelable, with a reproducible and predetermined opening force, and reusable.