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:
Jun. 19, 1979
Filed:
Dec. 30, 1977
Jerry F Sansbury, Hartsville, SC (US);
Sonoco Products Company, Hartsville, SC (US);
Abstract
A composite container comprising a tubular body formed of spirally wound plies of paperboard or the like and an internal vacuum accommodating liner substantially coextensive with the length of the tubular body and adhesively affixed solely at the opposed ends thereof to the tubular body. The container is completed by the mounting of opposed end caps which are hermetically sealed to the adhesively secured opposed ends of the liner for the accommodation of an internally developed vacuum within the liner. Formation of the tubular body and liner is effected utilizing conventional spiral winding equipment and involves (1) spirally forming a continuous liner with wide bands of adhesive spaced to correspond generally to the length of tube desired, (2) spirally forming a continuous length of composite tubing about the liner, the liner bonding peripherally to the tubing at the adhesive bands, and (3) severing the continuous tubing at a point generally centrally of each adhesive band whereby each formed tube will have the liner thereof adhesively secured solely at the opposite ends.