Patent ID: 6929172

Claim:
A severable carton wall comprising: a composite wall formed from a pair of overlapping panels joined along a seam, said seam comprising an overlap of respective end portions of said panels; and a frangible line extending across the composite wall, traversing the seam, defining a a removable portion of said composite wall; wherein a segment of the frangible line that traverses the seam is an extensively-weakened segment, and wherein the extensively-weakened segment is arcuate in shape and disposed such that the extensively-weakened segment defines a notch in said removable portion within said seam of said removable portion, and said extensively-weakened segment includes a pair of arcuate cut lines formed respectively in said end portions of said panels, said arcuate cut lines having different radii and being radially offset from each other to facilitate severance of the composite wall along said arcuate segment.