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:
Mar. 21, 1978
Filed:
Feb. 03, 1977
Ragnar Mandersson, Lund, SW;
AB Ziristor, Lund, SW;
Abstract
A laminated web comprising an internal base layer of paper faced with external thermoplastic layers is cut longitudinally into a plurality of separate webs each of which is then used in a packaging machine and formed into a tubular configuration with an overlapped edge seam. In order to prevent a 'wicking' action at the internal base paper layer located on the inside of the package tube which could take place when the package is filled with a liquid, a mode of cutting the web into the separate strips is utilized wherein one of the plastic outer layers along one edge of each strip projects laterally beyond the edge of the internal paper layer and the edge of the opposite outer plastic layer. When each web is thereafter formed into a tube in the packaging machine by the overlapped seam technique, the laterally projecting edge portion of the plastic layer is then adhered to the adjacent plastic layer thus effectively sealing off the edge of the internal paper layer from the liquid contents of the package.