Carton blank

• US 5,632,404 A
• Filed: 01/17/1996
• Issued: 05/27/1997
• Est. Priority Date: 12/21/1992
• Status: Expired due to Term

• Current Assignee: Graphic Packaging International Incorporated
• Original Assignee: Graphic Packaging Corporation
• Inventors: Walsh, Joseph C.
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US08/587,467
• Time in Patent Office: 496 Days
• Field of Search: 220/416, 220/418, 220/460, 220/461, 220/462, 220/463, 229/125.05, 229/125.32, 229/198.2, 229/246, 229/3.1, 428/34.2, 428/35.7
• US Class Current: 229/5.81
• CPC Class Codes: B31B 2105/001 made from laminated webs, e.g. including laminating the webs
• CPC Class Codes: B32B 37/12 characterised by using adhesives
• CPC Class Codes: B65D 5/563 Laminated linings; Coatings

Abstract

A carton blank comprising a relatively rigid material having an inner surface, having a central body portion and opposite edge portions and wherein a relatively flexible material, preferably fluid impervious, having a central body portion and opposite edge portions has its central body portion secured to the central body portion of the relatively rigid material and the opposite edge portions of the relatively rigid material and the relatively flexible material are not secured to each other. In some instances strips of another relatively flexible material are secured to the opposite edge portions of the relatively flexible material but are not secured to the opposite edge portions of the reactively rigid material. In other instances, a plurality of spaced apart strips of a relatively flexible material are superposed over portions of a relatively rigid material and a plastic coating is applied to the exposed surfaces thereof.

Claims

1. A carton blank comprising:

a unitary sheet of a relatively rigid material having an inner surface and an outer surface;

said unitary sheet of a material having a left side edge, a right side edge, a top edge and a bottom edge;

said unitary sheet of a relatively rigid material having a plurality of cut and fold lines for dividing said unitary sheet of relatively rigid material into a plurality of sidewall panel portions, a glue tab panel portion, and top and bottom panel portions extending outwardly from said sidewall panel portions;

each of said plurality of sidewall panel portions, said glue tab panel portion and said top and bottom panel portions having an inner surface;

a first sheet of a relatively flexible material having an inner surface and an outer surface superposed over said inner surface of said top panel portions and portions of said sidewall panel portions adjacent to said fold lines between said sidewall panel portions and said top panel portions and a portion of said inner surface of said glue tab panel portion;

a second sheet of a relatively flexible material having an inner surface and an outer surface superposed over said inner surface of said bottom panel portions, and other portions of said sidewall panel portions adjacent to said fold lines between said sidewall panel portions and said bottom panel portions and another portion of said inner surface of said glue tab panel portion; and

a continuous coating of a plastic material covering said inner surfaces of said first and second sheets of relatively flexible material and the portion of said inner surfaces of said plurality of sidewall panel portions and said glue tab panel portion between said first and second sheets of a relatively flexible material.

2. A carton blank as in claim 1 wherein:

said coated first and second sheets of relatively flexible material and said portion of said inner surfaces of said plurality of sidewall panel portions and said glue tab panel portion between said first and second sheets of a relatively flexible material are fluid impervious.

3. A carton blank as in claim 1 wherein:

said plurality of sidewall panel portions comprise a back panel portion, a right side panel portion, a front panel portion and a left side panel portion; and

said glue tab panel portion extends outwardly from one of said left side and right side panel portions.

4. A carton blank as in claim 3 wherein:

said relatively rigid material is paperboard; and

said relatively flexible material is paper.

5. A carton blank as in claim 1 and further comprising:

said glue tab panel portion having an upper edge and a lower edge;

a first cut-out portion in said glue tab panel portion extending inwardly from said upper edge; and

a second cut-out portion in said glue tab panel portion extending inwardly from said lower edge.

6. A carton blank as in claim 5 wherein:

said first and second cut-out portions extend completely through said glue tab panel portion so that portions of said first and second sheets of a relatively flexible material are exposed through said first and second cut-out portions.

7. A carton blank comprising:

a unitary sheet of a relatively rigid material having an inner surface and an outer surface;

said unitary sheet of a relatively rigid material having a left side edge, a right side edge, a top edge and a bottom edge;

said unitary sheet of a relatively rigid material having a plurality of cut and fold lines for dividing said unitary sheet of relatively rigid material into a plurality of sidewall panel portions, a glue tab panel portion and top and bottom panel portions extending outwardly from said sidewall panel portions;

each of said plurality of sidewall panel portions, said glue tab panel portion and said top and bottom panel portions having an inner surface;

a sheet of a relatively flexible plastic material superposed over said inner surface of said unitary sheet of relatively rigid material;

first securing means extending between said right side edge and said left side edge for securing a first portion of said sheet of a relatively flexible plastic material to portions of said inner surfaces of said sidewall panel portions located between said fold lines between said sidewall panel portions and said top and bottom panel portions and a first portion of said glue tab panel portion;

a first sheet of a relatively flexible material secured to a second portion of said sheet of relatively flexible plastic material and superposed over said top panel portions and the portions of said inner surfaces of said sidewall panel portions between said first portion of said sheet of relatively flexible material and said fold lines between said sidewall panel portions and said top panel portions and a second portion of said glue tab panel portion; and

a second sheet of a relatively flexible material secured to a third portion of said sheet of a relatively flexible plastic material and superposed over said bottom panel portions and the portions of said inner surfaces of said sidewall panel portions between said first portion of said sheet of relatively flexible plastic material and said fold lines between said sidewall panel portions and said bottom panel portion and a third portion of said glue tab panel portion.

8. A carton blank as in claim 7 wherein:

said sheet of a relatively flexible plastic material is fluid impervious.

9. A carton blank as in claim 7 wherein:

said first and second sheets of a relatively flexible material are not directly secured to said sheet of relatively rigid material.

10. A carton blank as in claim 9 wherein:

said first and second sheets of a relatively flexible material comprising paper; and

said sheet of a relatively rigid material comprising paperboard.

11. A carton blank as in claim 7 wherein:

said plurality of sidewall panel portions comprise a back panel portion, a right side panel portion, a front panel portion and a left side panel portion; and

said glue tab portion extends outwardly from one of said left side and right side panel portions.

12. A carton blank as in claim 7 and further comprising:

said glue tab panel portion having an upper edge and a lower edge;

a first cut-out portion in said glue tab panel portion extending inwardly from said upper edge; and

a second cut-out portion in said glue tab panel portion extending inwardly from said lower edge.

13. A carton blank as in claim 12 wherein:

said first and second cut-out portions extend completely through said glue tab panel portion so that portions of said first and second sheets of a relatively flexible material are exposed through said first and second cut-out portions.

14. A carton blank comprising:

a first layer comprising a unitary sheet of a relatively rigid material having an inner surface and an outer surface;

said unitary sheet of a relatively rigid material having at least a left side edge, a right side edge, a top edge and a bottom edge;

said unitary sheet of a relatively rigid material having a plurality of cut and fold lines for dividing said unitary sheet into at least a plurality of sidewall panel portions, a glue tab panel portion and top and bottom panel portions extending from said sidewall panel portions;

a second layer comprising a fluid impervious material having an inner surface and an outer surface;

at least a portion of said inner surface of said first layer secured to at least a portion of said outer surface of said second layer; and

at least one sheet of a relatively flexible material located between said first and second layers and being secured to said second layer and not secured to said first layer.

15. A carton blank comprising:

a unitary sheet of a relatively rigid material having an inner surface and an outer surface;

said unitary sheet of a relatively rigid material having a left side edge, a right side edge, a top edge and a bottom edge, said left and right side edges being perpendicular to said top and bottom edges;

said unitary sheet of relatively rigid material having a plurality of cut and fold lines for dividing said unitary sheet of relatively rigid material into a plurality of sidewall panel portions, a glue tab panel portion and top and bottom panel portions extending outwardly from each of said sidewall panel portions;

each of said plurality of sidewall panel portions, said glue tab panel portion and said top and bottom panel portions having an inner surface;

a first sheet of relatively flexible, fluid impervious material superposed only over portions of said inner surface of said sidewall panel portions and a portion of said inner surface of said glue tab panel portion;

first securing means extending continuously between said right side edge and said left side edge for sealing and securing a portion of said first sheet of relatively flexible material to portions of said inner surface of said sidewall panel portions adjacent to said fold lines between said sidewall panel portions and said top panel portions and to said portion of said glue tab panel portion and leaving a remaining portion unsecured;

a second sheet of relatively flexible, fluid impervious material superposed only over other portions of said inner surface of said sidewall panel portions and another portion of said inner surface of said glue tab panel portion; and

second securing means extending continuously between said right side edge and said left side edge for sealing and securing a portion of said second sheet of relatively flexible material to said inner surface of said sidewall panel portions adjacent to said fold lines between said sidewall panel portions and said bottom panel portions and to said another portion of said glue tab panel portion and leaving a remaining portion unsecured.

16. A carton blank as in claim 15 wherein:

said first sheet of a relatively flexible material having an upper edge, a central body portion and a lower edge;

said first securing means securing portions of said central body portion adjacent to said upper edge to said portions of said sidewall panel portions and said portion of said glue tab panel portion;

said second sheet of a relatively flexible material having an upper edge, a central body portion and a lower edge; and

said second securing means securing portions of said central body portion adjacent to said lower edge to said other portions of said sidewall panel portions and said another portion of said glue tab panel portions.

17. A carton blank as in claim 16 wherein:

said plurality of sidewall panel portions comprise a back panel portion, a right side panel portion, a front panel portion and a left side panel portion; and

said glue tab portion extends outwardly from one of said left side and right side panel portions.

18. A carton blank as in claim 17 wherein:

said plurality of sidewall panel portions comprise a back panel portion, a right side panel portion, a front panel portion and a left side panel portion; and

said glue tab portion extends outwardly from one of said left side and right side panel portions.

19. A carton blank comprising:

a unitary sheet of a relatively rigid material having an inner surface and an outer surface;

said unitary sheet of a relatively rigid material having a left side edge, a right side edge, a top edge and a bottom edge;

said unitary sheet of a relatively rigid material having a plurality of cut and fold lines for dividing said unitary sheet of a relatively rigid material into a plurality of sidewall panel portions, a glue tab panel portion and a plurality of top and bottom panel portions extending outwardly in opposite directions from said plurality of sidewall panel portions and joined thereto by fold lines;

said inner surface of said plurality of sidewall panel portions and said glue tab panel portion having a central body portion and opposite edge portions;

said central body portion located between and spaced from said fold lines between said plurality of sidewall panel portions and said plurality of top wall panel portions and said fold lines between said plurality of sidewall panel portions and said plurality of bottom wall panel portions and extending into said glue tab panel portion;

a rectangular sheet of a relatively flexible, fluid impervious material having a central body portion;

said central body portion of said rectangular sheet of a relatively flexible material being secured to said central body portion of said inner surface of said plurality of sidewall panel portions and said glue tab panel portion;

said rectangular sheet of a relatively flexible material having opposite edge portions;

at least portions of one of said opposite edge portions of said rectangular sheet of a relatively flexible fluid impervious material overlying but not secured to one of said opposite edge portions of said sidewall panel portions and said glue tab panel portion; and

at least portions of the other of said opposite edge portions of said rectangular sheet of a relatively flexible fluid impervious material overlying but not secured to the other of said opposite edge portions of said sidewall panel portions and said glue tab panel portion.

20. A carton blank as in claim 19 wherein:

said rectangular sheet of a relatively flexible material is plastic.

21. A carton blank as in claim 19 wherein:

said rectangular sheet of a relatively flexible material is a plastic coated paper.

22. A carton blank as in claim 19 wherein:

said central body portion of said plurality of sidewall panel portions and said glue tab panel portion has a top edge adjacent to but spaced from said fold lines between said plurality of sidewall panel portions and said top wall panel portions;

said top edge of said central body portion extending in a linear direction into said glue tab panel portion;

said central body portion of said plurality of sidewall panel portions and said glue tab panel portion having a bottom edge adjacent to but spaced from said fold lines between said plurality of sidewall panel portions and said bottom wall panel portions; and

said bottom edge of said central body portion extending in a linear direction into said glue tab panel portion.

23. A carton blank as in claim 22 wherein:

said glue tab panel portion having a top edge and a bottom edge;

said glue tab panel portion having a first cut-out portion extending between said top edge of said glue tab panel portion and said top edge of said central body portion; and

said glue tab panel portion having a second cut-out portion extending between said bottom edge of said glue tab panel portion and said bottom edge of said central body portion.