Flip-top reclosable carton and method of making the same

• US 5,505,374 A
• Filed: 07/13/1995
• Issued: 04/09/1996
• Est. Priority Date: 07/13/1995
• Status: Expired due to Fees

• Current Assignee: Caraustar Industries Incorporated (Greif Incorporated)
• Original Assignee: Packaging Corporation of America
• Inventors: Stone, James L.
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US08/501,996
• Time in Patent Office: 271 Days
• Field of Search: 229/145, 229/154, 229/226, 229/227, 229/905, 493/128-132, 493/162, 493/167-174, 493/183
• US Class Current: 229/227
• CPC Class Codes: B65D 5/0263 with end closures formed by inward folding of flaps, three of them being formed of a continuous strip, the fourth being a separate flap
• CPC Class Codes: B65D 5/5415 the lines of weakness being provided in one or more closure flaps and in the container body so as to form after rupture a lid hinged to a side edge of the container body

Abstract

A side-filled, flip-top reclosable carton comprises opposing top and bottom walls and opposing front and back walls where the front wall includes inner and outer panels. First and second top minor flaps extend from opposing ends of the top wall. First and second bottom minor flaps extend from opposing ends of the bottom wall. First and second back major flaps extend from opposing ends of the back wall. First and second wing flaps extend from opposing ends of the front inner panel. First and second front major flaps extend from opposing ends of the front outer panel. The first and second front major flaps and the front outer panel including a continuous horizontal tear strip for opening up the carton from a sealed form to form a lid hingedly attached to a base section. The first top and bottom minor flaps, the first front and back major flaps, and the first wing flap are uniquely designed to permit sealing of the first side wall using a conventional flap folding sequence so that the carton is entirely compatible with conventional form-fill-seal equipment. The various second flaps are similarly folded and glued using the conventional folding sequence to form a second side wall opposing the first side wall.

Claims

1. A side-filled, flip-top reclosable carton composed of a unitary, continuous blank, comprising:

opposing top and bottom walls;

opposing front and back walls bridging said opposing top and bottom walls, said front wall including a front inner panel and a front outer panel;

first and second top minor flaps extending from opposing ends of said top wall;

first and second bottom minor flaps extending from opposing ends of said bottom wall;

first and second back major flaps extending from opposing ends of said back wall;

first and second wing flaps extending from opposing ends of said front inner panel; and

first and second front major flaps extending from opposing ends of said front outer panel, said first and second front major flaps and said front outer panel including a continuous horizontal tear strip for opening up the carton from a sealed form to form a lid hingedly attached to a base section;

said first top and bottom minor flaps, said first front and back major flaps, and said first wing flap cooperating with each other to form a first side wall, said first top and bottom minor flaps and said first wing flap being disposed between said first front and back major flaps, said first front major flap abutting an outer surface of said first top minor flap, said first back major flap abutting inner surfaces of said first top and bottom minor flaps;

said second top and bottom minor flaps, said second front and back major flaps, and said second wing flap cooperating with each other to form a second side wall opposing said first side wall, said second top and bottom minor flaps and said second wing flap being disposed between said second front and back major flaps, said second front major flap abutting an outer surface of said second top minor flap, said second back major flap abutting inner surfaces of said second top and bottom minor flaps, said first and second side walls bridging said opposing top and bottom walls and bridging said opposing front and back walls.

2. The carton of claim 1, wherein said first and second bottom minor flaps are attached to said respective first and second back major flaps.

3. The carton of claim 2, wherein said first and second bottom minor flaps abut and are attached to said respective first and second front major flaps.

4. The carton of claim 1, wherein said first and second top minor flaps are unattached to said respective first and second back major flaps.

5. The carton of claim 4, wherein said first and second top minor flaps are attached to said respective first and second front major flaps.

6. The carton of claim 5, wherein said first and second top minor flaps are generally co-planar with and non-overlapping relative to said respective first and second wing flaps.

7. The carton of claim 6, wherein said first and second top minor flaps are immediately adjacent to said respective first and second wing flaps.

8. The carton of claim 1, wherein said first and second wing flaps are attached to said respective first and second back major flaps.

9. The carton of claim 8, wherein said first and second wing flaps are unattached to said respective first and second front major flaps.

10. The carton of claim 9, wherein said first and second wing flaps are hingedly connected to at least uppermost portions of said respective opposing ends of said front inner panel.

11. The carton of claim 1, wherein said first and second back major flaps are attached to said respective first and second front major flaps.

12. In a side-filled, flip-top reclosable carton composed of a unitary, continuous blank and including opposing top and bottom wails;

opposing front and back walls bridging said opposing top and bottom walls, said front wall including a front inner panel and a front outer panel;

first and second top minor flaps extending from opposing ends of said top wall;

first and second bottom minor flaps extending from opposing ends of said bottom wall;

first and second back major flaps extending from opposing ends of said back wall;

first and second wing flaps extending from opposing ends of said front inner panel; and

first and second front major flaps extending from opposing ends of said front outer panel, said first and second front major flaps and said front outer panel including a continuous horizontal tear strip for opening up the carton from a sealed form to form a lid hingedly attached to a base section;

said first top and bottom minor flaps, said first front and back major flaps, and said first wing flap cooperating with each other to form a first side wall;

said second top and bottom minor flaps, said second front and back major flaps, and said second wing flap cooperating with each other to form a second side wall opposing said first side wall, said first and second side walls bridging said opposing top and bottom walls and bridging said opposing front and back walls, a method of folding and sealing said side walls comprising the steps of;

folding said first back major flap inward approximately 90 degrees relative to said back wall;

folding said first top and bottom minor flaps inward approximately 90 degrees relative to said respective top and bottom walls so that said first back major flap abuts inner surfaces of said first top and bottom minor flaps;

folding said first wing flap and said first front major flap inward approximately 90 degrees relative to said respective front inner and outer panels so that said first top and bottom minor flaps and said first wing flap are disposed between said first front and back major flaps and so that said first front major flap abuts an outer surface of said first top minor flap;

folding said second back major flap inward approximately 90 degrees relative to said back wall;

folding said second top and bottom minor flaps inward approximately 90 degrees relative to said respective top and bottom walls so that said second back major flap abuts inner surfaces of said second top and bottom minor flaps; and

folding said second wing flap and said second front major flap inward approximately 90 degrees relative to said respective front inner and outer panels so that said second top and bottom minor flaps and said second wing flap are disposed between said second front and back major flaps and so that said second front major flap abuts an outer surface of said second top minor flap.

13. The method of claim 12, further including the step of attaching said first and second bottom minor flaps to said respective first and second back major flaps.

14. The method of claim 13, wherein said first and second front major flaps abut outer surfaces of said respective first and second bottom minor flaps, and further including the step of attaching said first and second bottom minor flaps to said respective first and second front major flaps.

15. The method of claim 12, further including the step of attaching said first and second top minor flaps to said respective first and second front major flaps.

16. The method of claim 15, wherein said first and second top minor flaps are generally co-planar with, non-overlapping relative to, and immediately adjacent to said respective first and second wing flaps.

17. The method of claim 12, further including the step of attaching said first and second wing flaps to said respective first and second back major flaps.

18. The method of claim 17, wherein said first and second wing flaps are hingedly connected to at least uppermost portions of said respective opposing ends of said front inner panel.

19. The method of claim 12, further including the step of attaching said first and second back major flaps to said respective first and second front major flaps.

20. In a side-filled, flip-top reclosable carton composed of a unitary, continuous blank and including opposing top and bottom walls;

opposing front and back walls bridging said opposing top and bottom walls, said front wall including a front inner panel and a front outer panel;

first and second top minor flaps extending from opposing ends of said top wall;

first and second bottom minor flaps extending from opposing ends of said bottom wall;

first and second back major flaps extending from opposing ends of said back wall;

first and second wing flaps extending from opposing ends of said front inner panel; and

first and second front major flaps extending from opposing ends of said front outer panel, said first and second front major flaps and said front outer panel including a continuous horizontal tear strip for opening up the carton from a sealed form to form lid hingedly attached to a base section;

said first top and bottom minor flaps, said first front and back major flaps, and said first wing flap cooperating with each other to form a first side wall;

said second top and bottom minor flaps, said second front and back major flaps, and said second wing flap cooperating with each other to form a second side wall opposing said first side wall, said first and second side walls bridging said opposing top and bottom walls and bridging said opposing front and back walls, a method of sealing said side walls comprising the steps of;

folding said first back major flap inward approximately 90 degrees relative to said back wall;

applying adhesive to an outer surface of said first back major flap, an upper portion of said first back major flap being free of said adhesive;

folding said first top and bottom minor flaps inward approximately 90 degrees relative to said respective top and bottom walls so that said adhesive attaches said first bottom minor flap to an outer surface of said first back major flap, said first top minor flap being in unattached contact with said first back major flap;

applying adhesive to inner surfaces of said first wing flap and said first front major flap;

folding said first wing flap and said first front major flap inward approximately 90 degrees relative to said respective front inner and outer panels so that said adhesive attaches said first wing flap to an outer surface of said first back major flap and attaches said first front major flap to an outer surface of said first top minor flap;

folding said second back major flap inward approximately 90 degrees relative to said back wall;

applying adhesive to an outer surface of said second back major flap, an upper portion of said second back major flap being free of said adhesive;

folding said second top and bottom minor flaps inward approximately 90 degrees relative to said respective top and bottom walls so that said adhesive attaches said second bottom minor flap to an outer surface of said second back major flap, said second top minor flap being in unattached contact with said second back major flap;

applying adhesive to inner surfaces of said second wing flap and said second front major flap; and

folding said second wing flap and said second front major flap inward approximately 90 degrees relative to said respective front inner and outer panels so that said adhesive attaches said second wing flap to an outer surface of said second back major flap and attaches said second front major flap to an outer surface of said second top minor flap.

21. The method of claim 20, wherein said step of folding said first wing flap and said first front major flap includes the step of attaching said first front major flap to the outer surfaces of said first bottom minor flap and said first back major flap, and wherein said step of folding said second wing flap and said second front major flap includes the step of attaching said second front major flap to the outer surfaces of said second bottom minor flap and said second back major flap.