Nestable, stackable, leak-proof container

Claim 1

A nestable, stackable open-ended container comprising a single die cut blank which is scored near the center thereof to form a continuous rectangular shaped base portion; first and second continuous side wall portions each having a pair of diagonally aligned scorings and being integrally joined to opposite sides of said base portion along a first pair of parallel scorings which define said base portion; first and second short lower end walls being integrally joined to the remaining opposite sides of said base portion along the remaining pair of parallel scorings defining said base portion; first, second, third and fourth upper end wall portions; said first and second upper end wall portions each being integrally joined to the ends of said first side wall along the diagonal scorings of said first side wall; said third and fourth upper end wall portions being integrally joined to the ends of said second side wall along the diagonal scorings of said second side wall; the vertically aligned marginal edges of said first and third and said second and fourth upper end wall portions respectively being partially overlapped when said side walls and end walls are folded along the scorings defining said base portion and along the diagonal scorings defining the sides of said side wall portions; first and second gusset portions each having a triangular shape defined on two sides thereof by scorings and a third free unconnected edge; each of said gussets having one of their sides integrally joined to the first lower end wall along one of said scorings and having another one of their sides integrally joined to the first and third upper side wall portions along another one of their scorings; third and fourth gusset portions each having a triangular shape defined on two sides thereof by scorings and a third free unconnected edge; said third and fourth gusset portions each having one of their sides integrally joined to the second short lower end wall along one of their scorings and another one of their sides integrally joined to the second and fourth side wall portions along another one of their scorings; the free edges of each of said gussets being spaced inwardly from the outer edges of the short end wall and upper end wall portions to which the gussets are joined, to define a notch when the container blank is in the flat unfolded position; the gussets being positioned between their associated short end walls and upper end wall portions when said container is folded and fully assembled to provide a lower, leak-proof portion for said container; the upper free edges of said first and second short lower end wall portions being positioned a spaced distance above the free edges of the associated gussets when the carton blank is in the folded position whereby said upper free edges abut the respective exterior surfaces of said first and third and said second and fourth upper end wall portions intermediate their ends; adhesive means securing the partially overlapping portions of said first and third and said second and fourth upper end wall portions respectively, and securing the upper marginal portions of said first and second short end wall portions respectively to said first and third and said second and fourth end wall portions to form a tapered container having diagonally aligned side and end walls forming an open end dimensionally larger than said rectangular base portion to facilitate stacking of a large plurality of said containers with each such container telescopingly receiving the next upper container.