A flanged closure insert is provided for the socket of a hermetically sealed thermoplastic container. The closure insert has an outwardly extending peripheral flange that facilitates sealing of the container. The thermoplastic material of the container may be welded to the flange for an enhanced sea...http://www.google.es/patents/US6092682?utm_source=gb-gplus-sharePatente US6092682 - Hermetically sealed container with closure insert
