The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1976
Filed:
Oct. 10, 1974
John DeLigt, Covington, VA (US);
David F Talbert, Millboro, VA (US);
Westvaco Corporation, New York, NY (US);
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.