Vorrichtung zum Querschweissen und Trennen einer Kunststoffolien-Doppelbahn

摘要

An apparatus for making bags from a multilayer synthetic-resin strip workpiece has a transporter for conveying the workpiece longitudinally in a transport direction along a path, an upper vertically displaceable welding element along the path having relative to the direction an upper upstream welding tool extending across the path and generally parallel thereto an upper downstream welding tool, and respective vertically displaceable lower upstream and downstream welding tools vertically aligned with the upper upstream and downstream tools. A blade extends transverse to the path between one of the upstream tools and the respective downstream tool. Displacement together of the tools with a workpiece between them welds the workpiece together along upstream and downstream seams at the respective tools and cuts the workpiece across with the blade between the seams, and away from one another frees the severed downstream end section of the workpiece. A stack support downstream of the tools catches and holds the severed end sections in a stack. This stack support is displaced in the transport direction synchronously with displacement of the tools for offsetting the trailing ends of succeeding severed end sections in the stack. Thus the offset ends of the bag-forming end sections do not lie on each other so they will not fuse together.