Abstract: The closure is made of a thermosetting plastic foil that is brought in contact with a projecting lip on the rim of a bottle neck whereby a central part of the foil is irreversibly deformed by heating and stretching over the upper surface of the lip. The closing of the bottle by stretching the heated foil portion is made in a single operational step.
Type:
Grant
Filed:
October 11, 1978
Date of Patent:
April 8, 1980
Assignee:
Institut fur Leichtbau und Okonomische Verwendung Von Werkstoffen