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A rectangular box for transporting multiple pizza pies in a stacked formation formed by a single cardboard blank having scoring and cut-outs for assembling into a multiple pizza box. The box has a bottom wall, four side walls and a lid hinged to one of the side walls. When assembled the box has a pa

A rectangular box for transporting multiple pizza pies in a stacked formation formed by a single cardboard blank having scoring and cut-outs for assembling into a multiple pizza box. The box has a bottom wall, four side walls and a lid hinged to one of the side walls. When assembled the box has a pair of corner shelf supports and a removable shelf for positioning a second pizza pie. The shelf supports also provide a stop for the lid of the box to prevent crushing the contents. Both the rectangular box and a removable shelf can be stored flat when not in use.

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1. An improved cardboard pizza box for transporting two or more pizza pies, said box having a rectangular floor, four side walls integrally connected to the floor and forming four corners and a lid integrally to one of the side walls and spaced from the floor, the improvement comprising:two first in

1. An improved cardboard pizza box for transporting two or more pizza pies, said box having a rectangular floor, four side walls integrally connected to the floor and forming four corners and a lid integrally to one of the side walls and spaced from the floor, the improvement comprising:two first integral shelf supports positioned adjacent the rectangular floor and positioned in adjacent corners of the floor, said two integral shelf supports each formed by perforated and cut portions of the adjacent corners for folding inwardly; anda rectangular foldable shelf having a single perforated fold line parallel and adjacent to one peripheral side of the shelf to form a side wall when said shelf folded along the perforated fold line, wherein said foldable shelf has a dimension for disposition into the pizza box with the side wall of the shelf disposed adjacent to one of the side walls of the pizza box and wherein the one peripheral side rests on the floor and a portion of the shelf opposing the perforated fold line rests on the pair of first integral shelf supports when the box is assembled.2. The improved cardboard pizza box of claim 1, wherein the two integral shelf supports each form a rectangular support.3. The improved cardboard pizza box of claim 1, wherein the two integral shelf supports each form a support having more than two sides.4. The improved cardboard pizza box of claim 1, wherein a second pair of integral shelf supports are positioned at a predetermined space from the rectangular floor for receiving a second rectangular foldable shelf.5. The improved cardboard pizza box of claim 4, wherein the second pair of integral shelf supports are positioned proximate to the two first integral shelf supports.6. The improved cardboard box of claim 4, wherein the second pair of integral shelf supports are positioned in the other corners spaced from the adjacent corners having the two first integral shelf supports.7. The improved cardboard box of claim 1, wherein the side wall of the box opposing the side wall integrally connected to the lid has an extension for folding over to form a dual layer wall.8. The improved cardboard box of claim 7, wherein the side walls of the box adjacent to the dual layer wall have flaps for folding between the extension and corresponding side walls of the dual layer wall.9. The improved cardboard box of claim 1, wherein the two first integral shelf supports form a diamond shape.10. The improved cardboard box of claim 1, wherein the two first integral shelf supports form a triangular shape.11. The improved cardboard box of claim 10, wherein the triangular shaped shelf support has a base orientated parallel to the side walls and perpendicular to the floor when the box is assembled.12. The improved cardboard box of claim 1, wherein one of the side walls is adjacent to the lid when the box is in the unfolded position, and wherein the opposing side wall has extending flaps with inner tabs for disposition within slots disposed between the floor and the side wall which is adjacent to the lid.13. The improved cardboard box of claim 1, wherein the side wall adjacent to the lid when the box is in the unfolded position has a slot between the floor and said side wall, and at least one of the adjacent side walls has an extending flap with an inner tab for disposition within the slot.14. The improved cardboard box of claim 1, wherein the foldable shelf has corners opposing the fold line for disposition on the pair of first integral shelf support for providing a surface parallel to the floor within the box.15. The improved cardboard box of claim 1, wherein the side wall opposing the side wall adjacent to the lid has a slot for receiving a peripheral tab to provide a double layer side wall.16. The improved cardboard box of claim 1, further comprising horizontally extending cut-out tabs providing a gripping and stop means for the lid.17. The improved cardboard pizza box of claim 1, wherein the height of the shelf supports are the same height of the side wall of the shelf.