Procedure and installation to manufacture continuous banding tubes of successful development with welding (Machine-translation by Google Translate, not legally binding)

摘要

Process and installation, to manufacture continuous band tubes of sheet metal in helical development with welding, this comprising a device for driving the strap, a transformer and a welding device, whose procedure is characterized in that when the strap is introduced by driven cylinders In the device for transforming the strip, there is a pressure between the edge of the incoming strip facing the first turn of the nascent tube, and the edge of this first turn facing said strip, making a lateral pressure on the tube, so that the angle between the incoming strip and the axis of the tube decreases. (Machine-translation by Google Translate, not legally binding)