Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1974-10-10
1976-03-30
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425396, 425369, B29D 714
Patent
active
039472060
ABSTRACT:
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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DeLigt John
Talbert David F.
Flint, Jr. J. Howard
Marcontell W. Allen
Schmalz Richard L.
Westvaco Corporation
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