Patent ID: 7416631
Filing Date: 2008-08-26
Classification: B65B

Abstract:
1. A method of assembly between: a blister sheet having two plane main faces and comprising at least one product containment blister projecting on a first of said main faces, and a linerboard having two plane main faces and having at least one hole for the passage of said blister, the blister sheet and the linerboard being capable of occupying a defined relative position, in which a first of said main faces of the linerboard is laid against the first main face of the blister sheet, around the blister, and at least one of the first main faces being thermoadhesive or being made thermoadhesive, said method comprising: a) placing the blister sheet and the linerboard in said defined relative position, b) applying to the blister sheet and to the linerboard, which occupy said defined relative position, a pressure for the mutual clamping of their first main faces and a treatment capable of making adhesive said first main face which is thermoadhesive or is made thermoadhesive, for the time necessary for bringing about a mutual thermoadhesion of said first main faces, c) causing the application of said pressure and said treatment to cease, wherein steps b and c are carried out by causing a succession of individualized blister sheets and of linerboards, placed in said defined relative position during step a, to travel jointly and continuously, said step a itself being carried out continuously, wherein step b is carried out by a means selected from the group comprising induction and thermal conduction, wherein a plurality of electrodes and a plurality of counterelectrodes are circulated continuously in a respective closed circuit, said closed circuits comprising a common limited portion, along which the electrodes and counterelectrodes follow a common path, at the same time being matched in a defined relative position in which they offer a respective plane face toward one another, between an entrance, at which the electrodes and counterelectrodes approach one another, at the same time circulating along said respective closed circuit, and an exit, at which the electrodes and counterelectrodes move apart from one another, at the same time circulating along said respective closed circuit, and wherein step b is carried out by introducing a blister sheet and a linerboard, placed in their said defined relative position during step a, between a mutually corresponding electrode and counterelectrode at the entrance of said common path, and by causing the blister sheet and the linerboard, placed in their said defined relative position, to execute said common path between said mutually corresponding electrode and counterelectrode, as far as the exit, at which the mutual spacing apart of said mutually corresponding electrode and counterelectrode carries out step c.