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. 10, 2008
Filed:
Oct. 18, 2002
Thorbjörn Andersson, Södra Sandby, SE;
Ib Leth, Kävlinge, SE;
Thorbjörn Andersson, Södra Sandby, SE;
Ib Leth, Kävlinge, SE;
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
A packaging laminate for a retortable packaging container, the packaging laminate () including a paper or paperboard layer (), outer, liquid-tight coatings () and an aluminium foil () serving as gas barrier between the paper or paperboard layer () and one of the two outer liquid-tight coatings (). In order to compensate for or counteract possible loss of gas tightness because of crack formations or similar untightness in the tensile-sensitive aluminium foil (), the packaging laminate () includes at least one additional layer () serving as gas barrier between the paper or paperboard layer () and the aluminium foil (). Preferably, said at least one additional gas barrier layer () is bonded to the paper or paperboard layer () by an interjacent lamination or adhesive layer () of polypropylene or other olefin polymer, whereby the thickness or quantity of the additional gas barrier layer () may be reduced without deterioration in gas tightness properties in the finished packaging container.