Patent ID: 7331509

Claim:
A severable carton wall comprising: a substantially vertically disposed 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 removable upper portion of said composite wall; wherein the frangible line includes an extensively-weakened segment that substantially traverses the seam, wherein the extensively-weakened segment is shaped and disposed such that the extensively-weakened segment defines a notch in said removable upper portion within said seam of said removable upper portion, said extensively-weakened segment including a pair of cut lines formed respectively in said end portions of said panels such that the cut lines define a pair of secured protrusions formed respectively from said panels and extending upwardly from a lower portion of said composite wall, wherein the frangible line further includes a fold line segment extending away from said protrusions to facilitate separation of the composite wall along the extensively-weakened segment when said removable upper portion is pivoted about said fold line segment, and wherein said protrusions are joined directly to the lower portion of the composite wall without a hinged connection.