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AssigneeTetra Laval Holdings & Finance S.A.
InventorsTom Kjelgaard, Bengt Andersson
Estimating the term…
The disclosure relates to a method of producing a blank (50a, 50b) of thermosealable and creased packaging laminate for a microwave-friendly packaging container, comprising the steps of: (a) advancing a continuous web (1) of a base laminate (10) in a conversion line for the packaging laminate so that continuous blanks for said packaging containers are oriented with their top-to-bottom direction transversely of the machine direction of the conversion line and with a top-to-bottom interface (51), (b) providing said base laminate (10) with creases and cutting into said blanks (50a, 50b) of the packaging laminate, a continuous strip (2) of a material which conducts heat and electricity being applied in the machine direction in a region over said top-to-top/bottom interface (51) and in conjunction with step (a), and an elongate opening indication (53) being provided, before or after the application of the strip (2) so that the opening indication is positioned within the region of said strip. The disclosure also relates to a thus produced blank, as well as a packaging container which is formed using such a blank as the point of departure.
A blank of thermosealable and creased packaging laminate for a microwave-friendly packaging container, said blank of packaging laminate having a top end provided with an elongate opening indication comprising a perforation extending along the top end in a widthwise direction of the blank, and a continuous strip of a material which conducts heat and electricity disposed on one side of the packaging laminate and adjacent said top end so that it covers said opening indication, wherein the perforation extends across the entire width of the blank.
A blank of thermosealable and creased packaging laminate for a microwave-friendly packaging container, said blank of packaging laminate having a top end provided with an elongate opening indication comprising a perforation extending along the top end in a widthwise direction of the blank, and a continuous strip of a material which conducts heat and electricity disposed on one side of the packaging laminate and adjacent said top end so that it covers said opening indication, wherein the strip of conductive material extends across the entire width of the blank.
A blank of thermosealable and creased packaging laminate for a microwave-friendly packaging container, said blank of packaging laminate having a top end provided with an elongate opening indication comprising a perforation extending along the top end in a widthwise direction of the blank, and a continuous strip of a material which conducts heat and electricity disposed on one side of the packaging laminate and adjacent said top end so that it covers said opening indication, wherein both the perforation and the strip of conductive material extend across the entire width of the blank.
Dependencies are inferred from the claim text.