Westvaco Corporation

David F Talbert

John DeLigt

The cyclic application of glue to one face of strip elements continuously delivered edge-to-edge into a reciprocating kicker breech to be collimated into a row forming sheet assembly having thickness equal to the width of individual sheets is controlled by a cascaded series of relays whereby the remotely operated glue guns are not actuated by the final triggering event in the cycle unless a trigger safety device is released by a measurable addition to the cumulative sheet product within the preceding kicker cycle. Additionally, growth of the sheet accumulation is continuously monitored with an actual length comparison to a desired, set-point length. When the desired length is reached, glue gun operation is restrained for one cycle to provide an unbonded interface between the final strip of a preceding sheet and the first strip of a successive sheet.

Strip core sheet length control

In a sheet corrugating machine used to fabricate corrugated paper board from rolls of sheet stock, the formed sheet is held tightly to the undulating surface of one corrugating roll between the corrugating nip and a liner sheet application nip by a vacuum system within the corrugating roll. The corrugating roll vacuum system comprises apertures through the roll shell within the corrugation valleys. Such apertures communicate with longitudinal conduits disposed about the internal periphery of the roll shell and extended through one axial end of the roll. A stationary, sliding seal vacuum box evacuates only those conduits rotatively passing through the desired arc thereby leaving the roll journals free to simultaneously conduct roll heating steam therethrough.

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Millboro, VA, United States of America

David F Talbert