Patent ID: 6109000
Filing Date: 2000-08-29
Classification: B29C,B29L,B65B

Abstract:
A device for heat-welding a covering band made of a thermoplastic material to a blister band to form multiple packages, with control and adjustment for centering messages printed on said covering band with respect to each single package defined in said blister band, said device comprising:primary pulling means for driving said blister band and said covering band heat-welded therewith in a longitudinal motion;secondary pulling and pre-heating means, located upstream of said primary pulling means, said secondary pulling and pre-heating means comprising of a single roller, around which the covering band turns, for pulling said covering band at a peripheral speed lower than a speed of said primary pulling means and for heating the covering band to a temperature lower than a temperature necessary for heat-welding of the covering band with said blister band;means for heating the covering band to the temperature necessary for heat-welding with said blister band, said heating means being located in an area between a pre-heating area and an area where the covering band is applied to the blister band.