Patent ID: 8464871

Claim:
A blank for forming a container, the blank comprising: a central portion; an outer edge; and a marginal portion between the outer edge and the central portion, the blank comprising a radius extending from a center of the blank to the outer edge, the marginal portion comprising a plurality of radial score lines having an angular spacing between respective adjacent radial score lines, the plurality of score lines comprising a plurality of first score lines and a plurality of second score lines, the first score lines each having a respective first length and the second score lines each having a respective second length, the first length being less than the second length, the blank has a machine direction corresponding to the feed direction of the blank into a forming tool and a cross-direction that is perpendicular to the machine direction, the marginal portion has a first cross-direction portion at one cross-directional end of the blank, a second cross-direction portion at a second cross-directional end of the blank, a first machine-direction portion at one machine directional end of the blank, and a second machine-direction portion at a second machine-directional end of the blank, the blank comprises weakening features in each of the first cross-direction portion and the second cross-direction portion for weakening the blank to promote stretching of the blank in the first cross-direction portion and the second cross-direction portion, and strengthening features in each of the first machine-direction portion and the second machine-direction portion for strengthening the blank to resist stretching of the blank in the first machine-direction portion and the second machine-direction portion, the weakening features comprise the plurality of first score lines and at least a portion of the plurality second score lines, the strengthening features comprise at least a portion of the plurality of second score lines, and the strengthening features are free from any of the first score lines in the first machine-direction portion and the second machine-direction portion.