Patent ID: 6592505
Filing Date: 2003-07-15
Classification: B29C,B31B

Abstract:
A device for forming a tube provided with gussets out of a single-layer or multi-layer, continuously pre-stressed material web comprising:divided upper and lower folding plates mounted in a machine frame that determine a width of the tube when it is laid flat and over whose entrance sides the web is deflected in order to raise overlapping edge regions to be pressed in, said plates being adjustable in their distance from one another corresponding to the width of the tube to be formed and approaching one another in a direction of an exit region, at a right angle to a tube-forming plane and approximately in the shape of a wedge with an adjustable wedge angle; two rows of insertion disks, each mounted on carriers and engaging in a middle level between the upper and lower folding plates for forming gussets, a distance between said rows being adjustable in the tube-forming plane; and an adjusting device for both rows of insertion disks on the middle level between the upper and lower folding plates and connected to a device for displacing both rows of insertion disks in such a way that an angle formed by common tangents of both rows of insertion disks is sufficiently large that the insertion disks essentially firmly supply interior folding edges of the gussets, said carriers in said exit region being secured on capping pieces mounted to said frame such that said capping pieces can pivot around a crosswise axis while said carriers can pivot around a vertical axis, said carriers in an entrance region being pivotally mounted on said capping pieces and movable relative thereto in the plane of the insertion disks by a lever mechanism.