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. 20, 1993
Filed:
Dec. 17, 1991
Tom Kjelgaard, Lund, SE;
Tetra Alfa Holdings S.A., Pully, CH;
Abstract
A package container fabricated from plastic-coated packaging material includes an upper end wall and a sealing fin that extends across the upper end wall of the container. The sealing fin includes mutually facing material layers between which is located an opening strip. The opening strip includes an inner layer positioned between outer layers that are sealed to plastic coatings of the packaging material, and an intermediate layer positioned between the inner layer and each of the outer layers. The intermediate layer is fabricated from a material whose properties are such that the adhesive bonding strength between all material layers of the opening strip and between the outer layers of the opening strip and the plastic coating of the packaging material is greater than the internally cohesive bonding strength of the intermediate layer.