Patent ID: 6708465
Filing Date: 2004-03-23
Classification: B65B

Abstract:
A method for wrapping a compressed stack of soft elements, comprising the steps of:inserting the compressed stack in a feeding direction into a sleeve having overlapping portions so that the sleeve surrounds the compressed stack, and sealing the overlapping portions of the sleeve in the feeding direction by: providing a flow of air from between the sleeve and the compressed stack, thereby creating a negative pressure, providing an essentially flat surface between the sleeve and the compressed stack along the overlapping portions, the surface being cooled by the flow of air, applying heat to the overlapping portions of the sleeve so that the overlapping portions change into an at least partly molten state, and applying a pressurized fluid towards the partly molten overlapping portions, so that the portions are pressed against the cooled surface and joined together wherein the sleeve at least partly includes a thermoplastic material.