Self-locking stackable tapered container with partial top stucture

• US 7,207,473 B2
• Filed: 09/26/2003
• Issued: 04/24/2007
• Est. Priority Date: 09/27/2002
• Status: Active Grant

• Current Assignee: International Paper Company
• Original Assignee: International Paper Company
• Inventors: Fry, Stanley L.
• Primary Examiner(s): Elkins; Gary E.
• Application Number:
  US10/672,428
• Publication Number:
  US 20050040217A1
• Time in Patent Office: 1,306 Days
• Field of Search: 229/174, 229/175, 229/177, 229/178, 229/179, 229/915, 229/918, 229/919
• US Class Current: 229/174
• CPC Class Codes: B65D 5/0015 the container being formed by folding up portions connected to a central panel
• CPC Class Codes: B65D 5/0035 the ledges being located between side walls and doubled-over extensions B65D5/0025 takes precedence
• CPC Class Codes: B65D 5/22 held erect by extensions of one or more sides being doubled-over to enclose extensions of adjacent sides
• CPC Class Codes: B65D 5/28 with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
• CPC Class Codes: Y10S 229/918 Corner construction

Abstract

A stackable container for carrying produce. The container has tapered side walls or end walls to aid in the stacking of like containers. Also, the container has locking flaps that allow the container to be erected manually and without the need for fasteners. Further, at least one tapered wall of the container has a reinforcement flap that creates a partial top structure in the upper part of the container that helps prevent bulging of the walls. The reinforcement flap also creates doubled stacking tabs and diagonal corner posts that aid in the stacking of like containers.

Claims

1. A container formed from a blank, the container comprising:

a base panel, wherein the base panel further comprises at least one stacking slot cut into the base panel, the at least one stacking slot positioned to accept the at least one doubled stacking tab extending from an angled side wall of a sub-adjacent container and the at least one stacking slot is positioned adjacent to at least one of the side walls;

two opposing end walls connected to the base panel at substantially a 90°

angle;

two opposing side walls connected to the base panel at an angle less than 90°

, the side walls having a width equal or greater than the width of upper edges of the end walls, each side wall having a side flap connected to opposing sides of the side wall, each side flap having a lock recess along a top edge thereof, wherein at least one of the side walls has a first thickness and further comprises a crushed area, the crushed area having a second thickness, the second thickness being less than the first thickness, wherein a bottom of the crushed area is adjacent to the at least one stacking slot;

locking flaps connected to the end walls by at least one pair of lock hinge assemblies, wherein each locking flap folds inwardly to sandwich at least one side flap adjacent thereto between the locking flap and an end wall adjacent thereto and further, wherein each locking hinge assembly locks into the lock recess of the adjacent side flap; and

a reinforcement flap connected to at least one of the side walls by at least one doubled stacking tab, wherein the reinforcement flap lies flush against an inner surface of the side wall to which the reinforcement flap is connected.

2. The container according to claim 1, wherein at least one of the side flaps has a bottom edge that angles divergently upward from a bottom edge of at least one of the side walls.

3. The container according to claim 1, wherein the reinforcement flap further has at least one corner flap attached to opposing edges thereof and further, wherein at least one corner flap extends diagonally towards at least one of the locking flaps.

4. The container according to claim 3, wherein at least one of the locking flaps has at least one lock slot disposed along an outer edge thereof, at least one lock tab projects from a side edge of the at least one corner flap and further, wherein the at least one lock tab extends into the at least one lock slot.

5. The container according to claim 1, wherein a bottom tab projects from a bottom edge of at least one of the side flaps and at least one tab slot is disposed on the base panel adjacent to at least one of the end walls and further, wherein the bottom tab extends into the at least one tab slot.

6. The container according to claim 1, further comprising a flap tab disposed on the base panel adjacent to the at least one stacking slot, the flap tab having a contact edge disposed adjacent and parallel to the at least one stacking slot.

7. The container according to claim 1, wherein the width of at least one of the upper edges of at least one of the end wall is slightly less than the width of at least one bottom portion of at least one of the end walls.

8. The container according to claim 1, wherein at least one of the side walls taper towards an interior space of the container.

9. The container according to claim 1, wherein the bottom edge of at least one of the side flaps angles divergently upward from the bottom edge of at least one of the side walls such that the angle of divergence is about 3 degrees.

10. The container according to claim 1, wherein the top edge of at least one side flap angles divergently away from an upper edge of the at least one side wall.

11. The container according to claim 1, wherein the top edge of at least one side flap angles divergently away from an upper edge of the at least one side wall such that the angle of divergence is about 3 degrees.

12. A container formed from a blank, the container comprising:

a base panel;

two opposing end walls connected to the base panel at substantially a 90°

angle;

two opposing side walls connected to the base panel at an angle less than 90°

, the side walls having a width equal or greater than the width of upper edges of the end walls, each side wall having a side flap connected to opposing sides of the side wall, each side flap having a lock recess along a top edge thereof,

locking flaps connected to the end walls by at least one pair of lock hinge assemblies, wherein each locking flap folds inwardly to sandwich at least one side flap adjacent thereto between the locking flap and an end wall adjacent thereto and further, wherein each locking hinge assembly locks into the lock recess of the adjacent side flap;

a reinforcement flap connected to at least one of the side walls by at least one doubled stacking tab, wherein the reinforcement flap lies flush against an inner surface of the side wall to which the reinforcement flap is connected and the reinforcement flap further has at least one corner flap attached to opposing edges thereof;

at least one corner flap extends diagonally towards at least one of the locking flaps;

at least one of the locking flaps has at least one lock slot disposed along an outer edge thereof;

at least one lock tab projects from a side edge of the at least one corner flap; and

the at least one lock tab extends into the at least one lock slot.

13. The container according to claim 12, wherein the base panel further comprises at least one stacking slot cut into the base panel, the at least one stacking slot positioned to accept the at least one doubled stacking tab extending from an angled side wall of a sub-adjacent container.

14. The container according to claim 13, wherein the at least one stacking slot is positioned adjacent to at least one of the side walls.

15. The container according to claim 14, wherein at least one of the side walls has a first thickness and further comprises a crushed area, the crushed area having a second thickness, the second thickness being less than the first thickness, wherein a bottom of the crushed area is adjacent to the at least one stacking slot.

16. The container according to claim 14, further comprising a flap tab disposed on the base panel adjacent to the at least one stacking slot, the flap tab having a contact edge disposed adjacent and parallel to the at least one stacking slot.

17. The container according to claim 12, wherein at least one of the side flaps has a bottom edge that angles divergently upward from a bottom edge of at least one of the side walls.

18. The container according to claim 12, wherein a bottom tab projects from a bottom edge of at least one of the side flaps and at least one tab slot is disposed on the base panel adjacent to at least one of the end walls and further, wherein the bottom tab extends into the at least one tab slot.

19. The container according to claim 12, wherein the width of at least one of the upper edges of at least one of the end walls is slightly less than the width of at least one bottom portion of at least one of the end walls.

20. The container according to claim 12, wherein at least one of the side walls tapers towards an interior space of the container.

21. The container according to claim 12, wherein the bottom edge of at least one of the side flaps angles divergently upward from the bottom edge of at least one of the side walls such that the angle of divergence is about 3 degrees.

22. The container according to claim 12, wherein the top edge of at least one side flap angles divergently away from an upper edge of the at least one side wall.

23. The container according to claim 12, wherein the top edge of at least one side flap angles divergently away from an upper edge of the at least one side wall such that the angle of divergence is about 3 degrees.

24. A container formed from a blank, the container comprising:

a base panel comprising at least one stacking slot cut into the base panel;

two opposing end walls connected to the base panel;

two opposing side walls connected to the base panel, the side walls having a width equal or greater than the width of upper edges of the end walls, each side wall having a side flap connected to opposing sides of the side wall, each side flap having a lock recess along a top edge thereof, wherein at least one of the side walls has a first thickness and further comprises a crushed area, the crushed area having a second thickness, the second thickness being less than the first thickness, wherein a bottom of the crushed area is adjacent to the at least one stacking slot;

locking flaps connected to the end walls by at least one pair of lock hinge assemblies, wherein each locking flap folds inwardly to sandwich at least one side flap adjacent thereto between the locking flap and an end wall adjacent thereto and further, wherein each locking hinge assembly locks into the lock recess of the adjacent side flap; and

a reinforcement flap connected to at least one of the side walls by at least one doubled stacking tab, wherein the reinforcement flap lies against an inner surface of the side wall to which the reinforcement flap is connected.

25. The container according to claim 24, wherein at least one of the opposing end walls is connected to the base panel at substantially a 90°

angle.

26. The container according to claim 24, wherein at least one of the two opposing side walls is connected to the base panel at an angle that is less than 90°

.

27. The container according to claim 24, wherein the reinforcing flap lies flush against an inner surface of the side wall to which the reinforcement flap is connected.

28. The container according to claim 24, wherein the base panel further comprises at least one stacking slot cut into the base panel, the at least one stacking slot positioned to accept the at least one stacking tab of a sub-adjacent container.

29. The container according to claim 28, wherein the at least one stacking tab of a sub-adjacent container is a doubled stacking tab.

30. The container according to claim 28, wherein the at least one stacking tab extends from an angled side wall of a sub-adjacent container.

31. The container according to claim 28, wherein the at least one stacking slot is positioned adjacent to at least one of the side walls.

32. The container according to claim 31, further comprising a flap tab disposed on the base panel adjacent to the at least one stacking slot, the flap tab having a contact edge disposed adjacent and parallel to the at least one stacking slot.

33. The container according to claim 24, wherein at least one of the side flaps has a bottom edge that angles divergently upward from a bottom edge of at least one of the side walls.

34. The container according to claim 24, wherein the reinforcement flap further has at least one corner flap attached to opposing edges thereof and further, wherein at least one corner flap extends diagonally towards at least one of the locking flaps.

35. The container according to claim 34, wherein at least one of the locking flaps has at least one lock slot disposed along an outer edge thereof, at least one lock tab projects from a side edge of the at least one corner flap and further, wherein the at least one lock tab extends into the at least one lock slot.

36. The container according to claim 24, wherein a bottom tab projects from a bottom edge of at least one of the side flaps and at least one tab slot is disposed on the base panel adjacent to at least one of the end walls and further, wherein the bottom tab extends into the at least one tab slot.

37. A container formed from a blank, the container comprising:

a base panel;

two opposing end walls connected to the base panel;

two opposing side walls connected to the base panel, the side walls having a width equal or greater than the width of upper edges of the end walls, each side wall having a side flap connected to opposing sides of the side wall, each side flap having a lock recess along a top edge thereof,

locking flaps connected to the end walls by at least one pair of lock hinge assemblies, wherein each locking flap folds inwardly to sandwich at least one side flap adjacent thereto between the locking flap and an end wall adjacent thereto and further, wherein each locking hinge assembly locks into the lock recess of the adjacent side flap;

a reinforcement flap connected to at least one of the side walls by at least one doubled stacking tab, wherein the reinforcement flap lies against an inner surface of the side wall to which the reinforcement flap is connected and the reinforcement flap further has at least one corner flap attached to opposing edges thereof;

at least one of the locking flaps has at least one lock slot disposed along an outer edge thereof;

at least one lock tab projects from a side edge of the at least one corner flap; and

the at least one lock tab extends into the at least one lock slot.

38. The container according to claim 37, wherein at least one of the opposing end walls is connected to the base panel at substantially a 90°

angle.

39. The container according to claim 37, wherein at least one of the two opposing side walls is connected to the base panel at an angle that is less than 90°

.

40. The container according to claim 37, wherein the reinforcing flap lies flush against an inner surface of the side wall to which the reinforcement flap is connected.

41. The container according to claim 37, wherein at least one corner flap extends diagonally towards at least on of the locking flaps.

42. The container according to claim 37, wherein the base panel further comprises at least one stacking slot cut into the base panel, the at least one stacking slot positioned to accept the at least one stacking tab of a sub-adjacent container.

43. The container according to claim 42, wherein at least one of the side walls has a first thickness and further comprises a crushed area, the crushed area having a second thickness, the second thickness being less than the first thickness, wherein a bottom of the crushed area is adjacent to the at least one stacking slot.