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:
Dec. 24, 1996
Filed:
Jun. 27, 1994
Applicant:
Inventors:
George E Lennon, Newport, TN (US);
James R Martin, Hartsville, SC (US);
Charles D Anderson, Hartsville, SC (US);
Assignee:
Sonoco Products Company, Hartsville, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B31C / ; B31C / ;
U.S. Cl.
CPC ...
493299 ; 493302 ; 156195 ; 156425 ;
Abstract
A single-ply wound paperboard tube is disclosed as is its forming method. The method comprises applying an adhesive to a paperboard ply having relatively thin longitudinal edges and a relatively thick central portion therebetween, then spirally winding the ply about a mandrel in edge-overlapping relation. Preferably, the thinned edges and the thick central portion of the ply share a common face, and the ply is preferably steam-conditioned to raise its temperature and its moisture content prior to the application of the adhesive.