DEVICE FOR THE ZIGZAG FOLDING OF STRIP MATERIAL OR PLATE MATERIAL AND THE LIKE

摘要

A device for zigzag folding of strip material and the like by means of two dies, the facing sides of which are provided with teeth. Each of the dies is provided with ducts which open into the toothed die face. During operation, the two duct systems are alternately connected to a source of a pressure, either higher or lower than atmospheric pressure, in order to keep the material alternately against one of the two toothed die faces during open die positions.