Patent ID: 6748721
Filing Date: 2004-06-15
Classification: B29C,B29L

Abstract:
A thermoforming method for film on blister packaging machines comprising:pinching a film, fed intermittently in synchronization with the movement of a forming die and a heating die on a thermoforming system, between the forming die and the heating die of the thermoforming system, locally heating a plurality of pocket forming portions of the film by pressing the pocket forming portions of the film into contact with the surface of a plurality of hot plugs disposed facing a plurality of pocket holes of the forming die, by injecting compressed air from the forming die side, stopping the injection of compressed air from the forming die side, injecting compressed air from the heating die side, and extending the heated pocket forming portions of said film along an inner circumferential face of the pocket holes of the forming die to form a plurality of pockets.