Bending line along overlapping layers in folding box
First Claim
1. A folding box consisting of a first cut-to-size blank from non-transparent material, and a second cut-to-size blank from transparent stiff plastic foil, which extends over at least one box edge, a bending line provided in the plastic foil, second blank overlapping and being glued to the first cut-to-size blank on an inside surface of said first blank, wherein the overlap between the first and the second cut-to-size glanks exists also at at least one end of the bending line, and the bending line is continued in the first cut-to-size blank by a corresponding groove line, the bending line and groove line being approximately the same width and wherein a box edge of two box walls is formed by said bending line and said groove line, characterized in that the second blank is thinned-down to a fraction of the thickness of remaining portions of the second blank in an area along the bending line and directly adjacent to the bending line at the overlap between the first and the second blanks, the thinned-down area of the second blank extending over the entire width of the overlap.
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Accused Products
Abstract
In a folding box consisting of a cardboard blank part (1) and a plastic foil blank part (3) glued thereto, thinned-down areas (17) are placed in the foil blank part (3) at the overlap spots between the two blank parts in the area of the box edges, which directly adjoin the bend lines (13) and extend at least across the overlap length. The thinned-down areas (17) compensate stresses arising in the foil material at the overlap spots during folding, this compensation being by deformation, without which the cardboard material is stretched at the edge overlap spots so that it tears.
59 Citations
24 Claims
- 1. A folding box consisting of a first cut-to-size blank from non-transparent material, and a second cut-to-size blank from transparent stiff plastic foil, which extends over at least one box edge, a bending line provided in the plastic foil, second blank overlapping and being glued to the first cut-to-size blank on an inside surface of said first blank, wherein the overlap between the first and the second cut-to-size glanks exists also at at least one end of the bending line, and the bending line is continued in the first cut-to-size blank by a corresponding groove line, the bending line and groove line being approximately the same width and wherein a box edge of two box walls is formed by said bending line and said groove line, characterized in that the second blank is thinned-down to a fraction of the thickness of remaining portions of the second blank in an area along the bending line and directly adjacent to the bending line at the overlap between the first and the second blanks, the thinned-down area of the second blank extending over the entire width of the overlap.
- 15. Folding box according to 14 or 2, characterized in that the thinned-down areas are produced by an operation on one side of the plastic foil.
Specification