Plastic packaging machine - with two stations for welding and stretching cover foil on plastic flanged cup

摘要

Vacuum or gas-filled food packages of the cup type with flanges, closed by a welded foil, are produced in a machine with two stations. In the first, the foil is partly welded to the flange and heated. In the second, a vacuum is applied and a plunger is moved against the heated foil to stretch the foil into the cup. After the complete welding of the foil and flange, air pressure is applied to press the foil against the contents. This machine is easily adapted to packages of varying shape. It is equally suitable for vacuum- or gas-filled packages.