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:
Nov. 29, 1988
Filed:
Jan. 28, 1988
Willem A Nikkel, Covington, VA (US);
Westvaco Corporation, New York, NY (US);
Abstract
Apparatus for forming and fabricating single-faced paperboard, the lower corrugating roll is provided with numerous circumferential grooves which are partially evacuated beneath a traveling overlayment of paper web for the purpose of holding the web tightly against the corrugated roll profile. These grooves are evacuated by groove evacuation tubes connected with one or more vacuum manifolds. Such evacuation tubes have flared, tubular distal ends to match the slotted socket of respective tube holders. Each holder also includes a spring loaded mandrel to secure each tube in its respective socket in such a manner as to permit rapid removal and replacement of such tubes.