Patent ID: 8162205

Claim:
A blank of foldable material, said blank comprising: a flat, substantially rectangular, blank of foldable material having top, bottom, left and right side edges, and at least five interconnected body panels disposed between said left and right side edges, each of said panels extending from said top edge to said bottom edge; said top edge and said bottom edge having a plurality of peaks and valleys, a first portion of said plurality of peaks and valleys being joined by curvilinear lines and a second portion of said peaks and valleys being joined by straight lines, said curvilinear lines joining said peaks and valleys of said top edge being adjacent at least one of said straight lines joining said peaks and valleys of said top edge; a first plurality of identical arch-shaped fold lines disposed adjacent said top edge and said bottom edge and a first plurality of straight fold lines, said arch-shaped fold lines being arranged side by side and each of said arch-shaped fold lines meeting and terminating at points on the valleys of either said top or bottom edges and a point on one of said straight fold lines, said straight fold lines connecting the peaks of said top and bottom edges; a second plurality of arch-shaped fold lines, each of said second plurality of arch-shaped fold lines being disposed between and connecting adjacent arch-shaped fold lines of said first plurality of arch-shaped fold lines; a third plurality of arch-shaped fold lines, each of said third plurality of arch-shaped fold lines being disposed between and connecting adjacent arch-shaped fold lines of said first plurality of arch-shaped fold lines, said second and third plurality of arch shaped fold lines being disposed generally parallel to each other and forming a first plurality of regions therebetween; and, whereby joining the right and left side edges to first form a cylinder having a circumference defined by said at least five interconnected body panels and then folding the top edge inward and folding the bottom edge inward forms a substantially flat panel at the top and a substantially flat panel at the bottom.