Patent ID: 6508047
Filing Date: 2003-01-21
Classification: B65B

Abstract:
A method for capping cans having an upper part formed of a substantially flat top end, an upper frustoconical neck and a circular rim which connects the flat top end to the neck, comprising the steps ofplacing a portion of a film of thermoformable plastic material on the upper part of the can in contact with an upper edge of the rim to define a closed chamber in combination with the upper edge of the rim; heating the film to a thermoformable temperature; extracting air from the chamber followed by cooling which causes the film to harden and intimately adhere to the flat top end of the can which it covers, retaining its shape, wherein the air is extracted from the chamber by a thrust action exerted by a compressed air jet applied to the top of the film covering the upper part of the cans.