Container having an automatically locking bottom and blanks for making the same

• US 7,886,958 B2
• Filed: 09/12/2008
• Issued: 02/15/2011
• Est. Priority Date: 09/12/2008
• Status: Active Grant

• Current Assignee: WestRock Shared Services, LLC (WestRock Company)
• Original Assignee: Smurfit-Stone Container Enterprises Incorporated (WestRock Company)
• Inventors: Smith, Kenneth Charles
• Primary Examiner(s): Elkins; Gary E
• Application Number:
  US12/209,949
• Publication Number:
  US 20100065620A1
• Time in Patent Office: 886 Days
• Field of Search: 229/108.1, 229/109, 229/110, 229/117, 229/157
• US Class Current: 229/117
• CPC Class Codes: B65D 5/029 the tubular body presenting a special shape pyramidal B65D5/008
• CPC Class Codes: B65D 5/10 with end closures formed by inward-folding of self-locking flaps hinged to tubular body
• CPC Class Codes: B65D 5/3621 collapsed along two fold lines of the tubular body

Abstract

A blank of sheet material for forming a container including automatically locking bottom panels is provided. The blank includes a pair of end panels, a pair of side panels and at least one corner panel that are interconnected. The corner panel extends between an adjacent end panel and side panel. The blank includes bottom end panels extending from the end panels and bottom side panels extending from the side panels. A first coupling tab is integral with a bottom end panel, and a second coupling tab is integral with a bottom side panel. The first coupling tab attaches to a bottom side panel, and the second coupling tab attaches to a bottom end panel. The coupling tabs upwardly direct the bottom panels when the container is moved to a flat position and downwardly direct the bottom panels when the container is moved from the flat position to an erected position.

Claims

1. A blank of sheet material for forming a container including automatically locking bottom panels, said blank comprising:

a pair of end panels, a pair of side panels and at least one corner panel interconnected to form a pair of opposing end walls, a pair of opposing side walls and a corner wall of the container, said at least one corner panel extending between an adjacent end panel and side panel;

a plurality of bottom panels for forming a bottom wall of the container, said bottom panels comprising a pair of bottom end panels each extending from a bottom edge of each of said pair of end panels along respective end fold lines, and a pair of bottom side panels each extending from a bottom edge of each of said pair of side panels along respective side fold lines, a first bottom side panel having a free edge spaced a first distance from a first side fold line of the respective side fold lines;

a first coupling tab integral with a first bottom end panel of said pair of bottom end panels, the first coupling tab having a free edge spaced the first distance from a first end fold line of the respective end fold lines for connecting the first bottom end panel to a first end panel of the pair of end panels, the free edge of the first coupling tab being substantially parallel to the free edge of the first bottom side panel; and

a second coupling tab integral with a second bottom side panel of said pair of bottom side panels, the second coupling tab having a free edge spaced the first distance from a second side fold line of the respective side fold lines for connecting the second bottom side panel to a second side panel of the pair of side panels, the free edge of the second coupling tab being substantially parallel to the free edge of the first bottom side panel,

wherein said first coupling tab attaches to one of said pair of bottom side panels, and said second coupling tab attaches to one of said pair of bottom end panels, said coupling tabs configured to upwardly direct said bottom panels when the container is moved from an erected position to a knocked-down flat position and downwardly direct said bottom panels when the container is moved from a knocked-down flat position to an erected position.

2. A blank of sheet material in accordance with claim 1 further comprising a plurality of corner panels, each corner panel extending between each adjacent end panel and side panel for forming a substantially octagonal-shaped container.

3. A blank of sheet material in accordance with claim 2 wherein each of said plurality of corner panels comprises a bottom edge, at least one of said pair of bottom end panels and at least one of said bottom side panels comprise a corner portion extension proximate each of said bottom edges of said plurality of corner panels.

4. A blank in accordance with claim 1 wherein said pair of end panels comprises a first minor side panel and a second minor side panel, said pair of side panels comprises a first major side panel and a second major side panel, said at least one corner panel comprising a first corner panel, a second corner panel, and a third corner panel, wherein:

said first minor side panel comprises a first side edge and a second side edge;

said first corner panel extends from said second side edge of said first minor side panel;

said first major side panel extends from a side edge of said first corner panel that opposes said first minor side panel;

said second corner panel extends from a side edge of said first major side panel that opposes said first corner panel;

said second minor side panel extends from a side edge of said second corner panel that opposes said first major side panel;

said third corner panel extends from a side edge of said second minor side panel that opposes said second corner panel, said first, second, and third corner panels being narrower than said first and second minor side panels; and

said second major side panel extends from a side edge of said third corner panel that opposes said second minor side panel, said first and second major side panels being wider than said first and second minor side panels,

wherein said pair of bottom end panels further comprises a first minor bottom panel and a second minor bottom panel and said pair of bottom side panels comprises a first major bottom panel and a second major bottom panel,

said first minor bottom panel extending from a bottom edge of said first minor side panel, said first minor bottom panel comprising a base panel and said first coupling tab connected along a first tab fold line, a side edge of said first minor bottom panel at least partially defining said first coupling tab, wherein at least a portion of said side edge is at an acute angle to a bottom edge of said first corner panel;

said first major bottom panel extending from a bottom edge of said first major side panel;

said second minor bottom panel extending from a bottom edge of said second minor side panel; and

said second major bottom panel extending from a bottom edge of said second major side panel, said second major bottom panel comprising a base panel and said second coupling tab connected along a second tab fold line, a side edge of said second major bottom panel at least partially defining said second coupling tab, wherein at least a portion of said side edge is at an acute angle to a bottom edge of said third corner panel, said first and second major bottom panels being wider than said first and second minor bottom panels.

5. A blank in accordance with claim 4 wherein said first major bottom panel comprises an extension portion extending from a side portion thereof toward said second minor bottom panel, and said second major bottom panel comprises an extension portion extending from a side portion thereof away from said second coupling tab.

6. A blank in accordance with claim 4 wherein said first coupling tab is adjacent to a side edge of said first major bottom panel and said second coupling tab is adjacent a side edge of said second minor bottom panel.

7. A blank in accordance with claim 1 further comprising a plurality of top panels for forming a top wall of the container, said top panels comprising a pair of top end panels each extending from a top edge of each of said pair of end panels, and a pair of top side panels each extending from a top edge of said pair of side panels.

8. A blank in accordance with claim 7 wherein each of said plurality of corner panels comprises a top edge, at least one of said pair of top side panels comprises a corner portion extension proximate each of said top edges of said plurality of corner panels.

9. A blank in accordance with claim 7 wherein said pair of top end panels comprises a first minor top panel and a second minor top panel, and said pair of top side panels comprises a first major top panel and a second major top panel, wherein:

said first minor top panel extends from a top edge of said first minor side panel;

said first major top panel extends from a top edge of said first major side panel;

said second minor top panel extends from a top edge of said second minor side panel; and

said second major top panel extends from a top edge of said second major side panel.

10. A blank in accordance with claim 9 wherein said first major top panel comprises a first side extension that extends from said first major top panel toward said first minor top panel and a second side extension that extends from said first major top panel toward said second minor top panel, and wherein said second major top panel comprises a third side extension that extends from said second major top panel toward said second minor top panel and a fourth side extension that extends from said first major top panel away from said second minor top panel.

11. A blank in accordance with claim 7 wherein said pair of top side panels each comprise a pair of opposing slots and said pair of top end panels each comprise a pair of interlock tabs.

12. A blank in accordance with claim 11 wherein a first top side panel comprises a first slot and a second slot defined therein and a second top side panel comprises a third slot and a fourth slot defined therein, a first top end panel comprises a first interlock tab and a second interlock tab defined in a free edge thereof and a second top end panel comprises a third interlock tab and a fourth interlock tab defined in a free edge thereof, said first interlock tab is sized to be received within said fourth slot, said second interlock tab is sized to be received within said first slot, said third interlock tab is sized to be received within said second slot, and said fourth interlock tab is sized to be received within said third slot.

13. A blank in accordance with claim 1 further comprising:

a first glue tab extending from a side edge of one of said pair of end panels; and

a second glue tab extending from a side edge of one of said pair of side panels.

14. A blank in accordance with claim 1, wherein the bottom end panels and the second bottom side panel have free edges spaced at a second distance from respective fold lines, the second distance smaller than the first distance.

15. A blank in accordance with claim 1, wherein the pair of bottom side panels overlap without being coupled together when the container is in the erected position.

16. A blank in accordance with claim 1, wherein the free edge of the first bottom side panel, the free edge of the first coupling tab, and the free edge of the second coupling tab are substantially collinear.

17. A container formed from a blank of sheet material, said container including automatically locking bottom panels, said container comprising:

a pair of end walls, a pair of side walls, and at least one corner wall interconnected along a plurality of fold lines, said at least one corner wall extending between an adjacent end wall and side wall;

a bottom wall comprising a plurality of bottom panels, said plurality of bottom panels comprising a pair of bottom end panels each extending from a bottom edge of each of the pair of end walls along respective end fold lines, and a pair of bottom side panels each extending from a bottom edge of the pair of side walls along respective side fold lines, a first bottom side panel having a free edge spaced a first distance from a first side fold line of the respective side fold lines;

a first coupling tab integral with a first bottom end panel of the pair of bottom end panels, the first coupling tab having a free edge spaced the first distance from a first end fold line of the respective end fold lines for connecting the first bottom end panel to a first end panel of the pair of end panels, the free edge of the first coupling tab being substantially parallel to the free edge of the first bottom side panel; and

a second coupling tab integral with a second bottom side panel of the pair of bottom side panels, the second coupling tab having a free edge spaced the first distance from a second side fold line of the respective side fold lines for connecting the second bottom side panel to a second side panel of the pair of side panels, the free edge of the second coupling tab being substantially parallel to the free edge of the first bottom panel,

wherein said first coupling tab attaches to one of said pair of bottom side panels, and said second coupling tab attaches to one of said pair of bottom end panels, said coupling tabs configured to upwardly direct said bottom panels when said container is moved from an erected position to a knocked-down flat position and downwardly direct said bottom panels when said container is moved from a knocked-down flat position to an erected position.

18. A container in accordance with claim 17 further comprising a plurality of corner walls, each corner wall extending between each adjacent end wall and side wall for forming a substantially octagonal-shaped container.

19. A container in accordance with claim 18 wherein each of said plurality of corner walls comprises a bottom edge, at least one of said pair of bottom end walls and at least one of said bottom side walls comprise a corner portion extension proximate each of said bottom edges of said plurality of corner walls.

20. A container in accordance with claim 17 wherein said pair of end walls comprises a first minor side wall and a second minor side wall, said pair of side walls comprises a first major side wall and a second major side wall, said at least one corner wall comprises a first corner wall, a second corner wall, and a third corner wall, wherein:

said first corner wall is connected along a fold line to said first minor side wall;

said first major side wall is connected along a fold line to said first corner wall such that said first major side wall opposes said first minor side wall with respect to said first corner wall;

said second corner wall is connected along a fold line to said first major side wall such that said second corner wall opposes said first corner wall with respect to said first major side wall;

said second minor side wall is connected along a fold line to said second corner wall such that said second minor side wall opposes said first major side wall with respect to said second corner wall;

said third corner wall is connected along a fold line to said second minor side wall such that said third corner wall opposes said second corner wall with respect to said second minor side wall;

said second major side wall is connected along a fold line to said third corner wall such that said second major side wall opposes said second minor side wall with respect to said third corner wall, said first and second major side walls being wider than said first and second minor side walls;

said fourth corner wall is connected to said first minor side wall and said second major side wall along respective fold lines, said first, second, third, and fourth corner walls being narrower than said first and second minor side walls; and

said bottom wall is connected to bottom edges of said major and minor side walls, said bottom wall adjacent bottom edges of said corner walls, said pair of bottom end panels comprising a first minor bottom panel and a second minor bottom panel, said pair of bottom side panels comprising a first major bottom panel and a second major bottom panel, said first minor bottom panel comprising said first coupling tab and said second major bottom panel comprising said second coupling tab, wherein said first minor bottom panel is coupled to said first major bottom panel using said first coupling tab and said second minor bottom panel is coupled to said second major bottom panel using said second coupling tab.

21. A container in accordance with claim 17 wherein said pair of side walls is movable toward each other to collapse said container, wherein, when said container is in a collapsed configuration, said bottom panels are received at least within said side walls, said bottom panels being substantially parallel to said side walls in the collapsed configuration.

22. A container in accordance with claim 21 wherein said pair of side walls are movable away from each other to erect said container from the collapsed configuration without use additional bonding material, when said container is in an erected configuration, said bottom panels are automatically re-located with respect to said side walls and said end walls by movement of said side walls.

23. A container in accordance with claim 17 further comprising a top wall comprising a pair of top end panels extending from top edges of said pair of end panels and a pair of top side panels extending from top edges of said pair of side walls, said top panels movable from an opened configuration to a closed configuration.

24. A container in accordance with claim 23 wherein, when said top panels are in the closed configuration, said top end panels interlock with said top side panels to secure said top panels in the closed configuration.

25. A method of forming a container from a blank of sheet material, the blank including a pair of glue flaps, a pair of end panels, a pair of side panels, and at least one corner panel connected in series along a plurality of fold lines, said method comprising:

rotating the side panels, end panels, and the at least one corner panel about respective fold lines toward an interior surface of the blank;

coupling a first glue flap to a second glue flap to form a pair of side walls, a pair of end walls, and at least two corner walls, wherein a first corner wall includes the first and second glue flaps;

rotating a first major bottom panel about a first fold line toward an interior surface of a first side wall, the first major bottom panel having a free edge spaced at a first distance from the first fold line;

rotating a first minor bottom panel about a second fold line toward an interior surface of a first end wall, an interior surface of the first minor bottom panel contacting an exterior surface of the first major bottom panel;

rotating a second major bottom panel about a third fold line toward an interior surface of a second side wall, an interior surface of the second major bottom panel contacting exterior surfaces of the first major and minor bottom panels;

securing a first coupling tab of the second major bottom panel to the first minor bottom panel, the coupling tab of the second major bottom panel having a free edge spaced the first distance from the third fold line, the free edge of the first coupling tab being substantially parallel to the free edge of the first major bottom panel;

rotating a second minor bottom panel about a fourth fold line toward an interior surface of a second end wall, an interior surface of the second minor bottom panel contacting exterior surfaces of the major bottom panels; and

securing a second coupling tab of the second minor bottom panel to the first major bottom panel, the second coupling tab of the second minor bottom panel having a free edge spaced the first distance from the fourth fold line, the free edge of the second coupling tab being substantially parallel to the free edge of the first major bottom panel.

26. A method in accordance with claim 25 further comprising moving the first side panel toward the second side panel to convert the container from an open position to a collapsed position, said moving the side panels together causes the bottom panels to rotate about respective fold lines toward the interior surfaces of the side panels and to be received within the side panels, when the container is in the collapsed position the bottom panels are substantially parallel to the side panels.

27. A method in accordance with claim 26 wherein the at least one corner panel includes a fold line that substantially bisects the at least one corner panel into a first portion and a second portion, wherein said moving the side panels together further comprises rotating the first portion of the at least one corner panel about the fold line toward the second portion of the first corner panel such that an interior surface of the first portion is adjacent an interior surface of the second portion.

28. A method in accordance with claim 26 further comprising moving the first side panel away from the second side panel to convert the container from the collapsed position to an erect position that is substantially similar to the open position without use of additional bonding material, said moving the side panels apart causes the bottom panels to rotate about respective fold lines away from the interior surfaces of the side panels and into the open position without additional manipulation by a user.

29. A method in accordance with claim 25 wherein the blank includes a pair of top end panels that are connected to respective end panels along fold lines and a pair of top side panels that are connected to respective side panels along fold lines, said method further comprising:

rotating the top end panels about the respective fold lines toward a cavity of the container; and

rotating the top side panels about the respective fold lines toward the top end panels to convert the container from an open position to a closed position.

30. A method in accordance with claim 25 wherein the blank includes a pair of top end panels that are connected to respective end panels along fold lines and a pair of top side panels that are connected to respective side panels along fold lines, the top end panels each including at least one interlock tab and the top side panels each including at least one slot sized to receive a respective interlock tab, said method further comprising:

rotating the top side panels about respective fold lines toward a cavity of the container;

rotating the minor top panels about respective fold lines toward the top side panels; and

interlocking the interlock tabs of the top end panels into the respective slots defined in the top side panels to convert the container from an open position to a closed position.