Apparatus for forming diagonally corrugated paperboard

Abstract

Apparatus for forming diagonally corrugated paperboard having a longitudinally elongated frame upon which is laterally mounted at least one corrugating unit. Each corrugating unit consists of a conveyor mechanism having a continuous loop belt with parallel grooves formed in its outer surface and a mechanism to force the web of paper being passed through the corrugating unit down into the grooves of the continuous loop belt. The parallel grooves in the outer surface of the continuous loop belt are oriented diagonally with respect to the direction of travel of the conveyor mechanism. The mechanism to force the web of paper down into the grooves of the belt comprises a plurality of rods that extend in a corresponding diagonal direction across the width of the belt and whose opposite ends are not secured to any structure but which are floatingly carried around a closed loop path structure. The mechanism to force the web of paper down into the grooves further comprises a pair of mounting plates positioned on opposite lateral sides of the continuous loop belt with one of the plates positioned forwardly of the other along the longitudinal axis of said loop belt. Each set of plates rotatably support three gear-like members along their inner faces and these gear-like members synchronously carry the rods in a closed loop path while the ends of the rods are being floatingly carried. This closed loop path is defined by retaining members that pass around a major portion of the path and a vertically oriented plate having cam surfaces along its top and bottom surfaces with these cam surfaces forming a portion of the inner guide surface of said closed loop path. The mounting plates are attached to the frame in such a manner that they may be raised and lowered to thus vary the depth of the corrugations formed in the web of paper passing through the corrugating unit.

Dependencies are inferred from the claim text.