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:
Apr. 24, 1979
Filed:
Mar. 16, 1977
Applicant:
Inventor:
Ingemar W Ohlsson, Malmo, SE;
Assignee:
Tetra Pak Development, Lausanne, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
156 69 ; 156 84 ; 156218 ; 264 25 ; 264230 ; 264248 ; 264321 ; 264342 ; 264571 ; 264D / ;
Abstract
A method is disclosed for fabricating packing containers comprised of a heat-shrinkable material. A web or blank of the material is heated on one side to an extent such that the material acquires a tendency to assume a tubular shape. Overlapping longitudinal ends of the web or blanks are heat and pressure sealed to form a tubular member. The ends of the tubular member are folded inwardly under the effect of heat to form flange-like portions to which end plates may be attached to form the packing container.