| 摘要 |
A device for forming a tube provided with gussets out of a single- or multi-layer, continuously pre-stressed material web consists of divided upper and lower folding plates mounted on the machine frame that determine the width of the tube to be formed when it is laid flat, which approach one another with regard to their distance from one another approximately in the shape of a wedge and in a manner perpendicular to the plane of the tube to be formed, beginning from the approach sides, with the wedge angle being adjustable, and with the device having two rows of insertion discs respectively mounted on carriers reaching between the folding plates for forming the gussets, whose distance from one another may be adjusted in the plane of the tube to be formed. In order to decrease the number of adjustment procedures when changing the format, an adjustment device of both rows of insertion discs on the middle level between the upper and lower folding plates is directly or indirectly connected to a device for displacing both rows of insertion discs in such a manner that the angle formed by the common tangents of both rows of insertion discs is sufficiently large that the insertion discs essentially firmly supply the interior folding edges of the gussets. |
