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:
Jul. 18, 1989
Filed:
Aug. 02, 1988
Jorgen Niske, Lund, SE;
AB Tetra Pak, Lund, SE;
Abstract
A method for making parallelepiped or brick-shaped containers of greater mechanical strength and better appearance, avoiding any mismatching of the printed patterns due to displaced joints in the middle of the side of the container walls. A longitudinal seal is positioned at the corners rather than on the face of the side walls, thus leaving the side walls without joints or splices. A packaging material web taped coated with thermoplastic material and provided with folding lines is twisted when passing through two bending rollers and one slack-absorbing roller and is converted into a cylindrical shaped and then sealed at the overlapping side edges. The cylindrical container is then filled with a liquid through a filler pipe and sealed at predetermined intervals.