Closure for a food container and method for using the same

1. A closure for a container having a bottom, at least one sidewall extending generally upwardly from the bottom, and a substantially planar flange extending generally outwardly from a top of the at least one sidewalls, the closure comprising:

a base having a substantially planar flange trap, a base seal lock, and an opening, the flange trap having a generally horizontal orientation, the opening being defined inside of the flange trap, and the base seal lock extending beyond the flange trap; and

a top cover having a seal boss, a top cover seal lock, a substantially planar flange boss, and a top surface, the top cover seal lock being disposed to align with and contact the base seal lock when the closure is in a closed position, the flange boss being located inside of the top cover seal lock and being disposed to align with the flange trap when the closure is in the closed position, the seal boss being located inside of the top cover seal lock and the flange boss and outside the top surface, the seal boss having an open V-shaped configuration defined by first and second members joined at an apex extending downwardly beyond the top surface and the flange boss such that the seal boss extends into the base to contact at least one sidewall of a container positioned in the base when the closure is in the closed position.

2. The closure of claim 1 further comprising a hinge connecting the base to the top cover and allowing the closure to exist in an open position or a closed position.

3. The closure of claim 1 , wherein the closure comprises a polymer.

4. The closure of claim 3 , wherein the closure comprises oriented polystyrene (OPS).

5. The closure of claim 3 , wherein the closure comprises polyethylene terephthalate (PET).

6. The closure of claim 3 , wherein the closure comprises polypropylene.

7. A closure and a container combination comprising:

a container having a bottom, at least one side wall, and a substantially planar flange, the at least one side wall joining the bottom to the flange, the flange being generally horizontal and extending around a perimeter of the at least one side wall, the flange extending outwardly from the at least one side wall;

a closure having a base, a top cover, and a hinge;

the base having a substantially planar flange trap, a base seal lock, and an opening, the flange trap having a generally horizontal orientation, the opening being defined inside of the flange trap, and the base seal lock extending beyond the flange trap, the opening being sized so that the container bottom fits through the opening, the flange trap being positioned and sized to contact a bottom surface of the container flange;

the top cover having a seal boss, a top cover seal lock, a substantially planar flange boss, and a top surface, the top cover seal lock being disposed to align with and contact the base seal lock when the closure is in a closed position, the flange boss being located inside of the top cover seal lock and being disposed to align with the flange trap and contact the top surface of the container flange when the closure is in the closed position, the seal boss being located inside of the top cover seal lock and the flange boss and outside the top surface, the seal boss having an open V-shaped configuration defined by first and second members joined at an apex extending downwardly beyond the top surface and the flange boss such that the seal boss extends into the base and contacts the at least one side wall of the container when the lid is in the closed position; and

a hinge connecting the base to the top cover and allowing the closure to exist in an open position or a closed position.

8. A closure for a container comprising:

a base having a substantially planar flange trap, a base seal lock, at least one base sidewall, and an opening, the flange trap having a generally horizontal orientation, the at least one base sidewall extending downwardly from the flange trap to the opening, the opening being defined inside of the flange trap, and the base seal lock extending beyond the flange trap; and

a top cover having a seal boss, a top cover seal lock, a substantially planar flange boss, and a top surface, the top cover seal lock being disposed to align with and contact the base seal lock when the closure is in a closed position, the flange boss being located inside of the top cover seal lock and being disposed to align with the flange trap when the closure is in the closed position, the seal boss being located inside of the top cover seal lock and the flange boss and outside the top surface, the seal boss having an open V-shaped configuration defined by first and second members joined at an apex extending downwardly beyond the top surface and the flange boss such that the seal boss extends into the base to contact at least one sidewall of a container positioned in the base when the closure is in the closed position.

9. The closure of claim 8 , further comprising a hinge connecting the base to the top cover and allowing the closure to exist in an open position or a closed position.

10. The closure of claim 9 , wherein the closure comprises a polymer.

11. The closure of claim 10 , wherein the closure comprises oriented polystyrene (OPS).

12. The closure of claim 9 , wherein the closure comprises polyethylene terephthalate (PET).

13. The closure of claim 9 , wherein the closure comprises polypropylene.

14. A method of using a closure for a container and a container combination, the method comprising

providing a closure having a base, a top cover, and a hinge, the base having a substantially planar flange trap, a base seal lock, and an opening, the flange trap having a generally horizontal orientation, the opening being located inside of the flange trap, and the base seal lock extending beyond the flange trap, the top cover having a seal boss, a top cover seal lock, a substantially planar flange boss, and a top surface, the top cover seal lock being disposed to align with and contact the base seal lock when the closure is in a closed position, the flange boss being defined inside of the top cover seal lock and being disposed to align with the flange trap when the closure is in the closed position, the seal boss being located inside of the top cover seal lock and the flange boss and outside the top surface, the seal boss having an open V-shaped configuration defined by first and second members joined at an apex extending downwardly beyond the top surface and the flange boss such that the seal boss extends into the base and contacts at least one sidewall of a container positioned in the base when the closure is in the closed position, the hinge connecting the base to the top cover and allowing the closure to be moved between an open position and a closed position;

providing a container having a bottom, at least one side wall, and a substantially planar flange, the at least one side wall joining the bottom to the flange, the flange being generally horizontal and extending around a perimeter of the at least one side wall, the flange extending outwardly from the at least one side wall;

arranging the closure and the container such that the container bottom is within the opening of the closure base;

positioning the closure so that the flange trap of the closure base contacts the container flange;

moving the top cover of the closure about the hinge so that the flange boss of the top cover contacts the container flange and the seal boss is within the at least one sidewall of the container; and

securing the top cover of the container to the base so that the top cover seal lock engages the base seal lock.

15. The closure of claim 1 , wherein the seal boss contacts the at least one sidewall at a location below the flange trap when the closure is in the closed position.

16. The closure of claim 1 , wherein the seal boss is configured to form a seal with the at least one sidewall.

17. The closure of claim 1 , wherein the top surface of the closure is substantially aligned with the flange boss.

18. The closure of claim 1 , wherein the closure is secured to the container only when the closure is in the closed position.

19. The method according to claim 14 , wherein the seal boss contacts the at least one sidewall at a location below the flange trap when the closure is in the closed position.

20. The method according to claim 14 , wherein the seal boss is configured to form a seal with the at least one sidewall.

21. The method according to claim 14 , wherein the top surface of the closure is substantially aligned with the flange boss.

22. The method according to claim 14 , wherein the closure is secured to the container only when the closure is in the closed position.

23. The closure of claim 1 , wherein at least the top cover is made of a single sheet of material.

24. The closure and container of claim 7 , wherein at least the top cover is made of a single sheet of material.

25. The closure of claim 8 , wherein at least the top cover is made of a single sheet of material.

26. The method of claim 14 , wherein at least the top cover is made of a single sheet of material.