Expandable carton

• US 9,113,648 B2
• Filed: 04/10/2014
• Issued: 08/25/2015
• Est. Priority Date: 11/16/2009
• Status: Active Grant

• Current Assignee: Graphic Packaging International Incorporated
• Original Assignee: Graphic Packaging International Incorporated
• Inventors: Burke, Bradley J.
• Primary Examiner(s): ELKINS, GARY E
• Application Number:
  US14/249,675
• Publication Number:
  US 20140234505A1
• Time in Patent Office: 502 Days
• US Class Current: 1/1
• CPC Class Codes: A23L 5/15 using wave energy, irradiation, electrical means or magnetic fields, e.g. oven cooking or roasting using radiant dry heat
• CPC Class Codes: B65D 2205/02 Venting holes
• CPC Class Codes: B65D 2581/3406 Pizza or bread
• CPC Class Codes: B65D 2581/3421 Cooking pop-corn
• CPC Class Codes: B65D 2581/3437 specially adapted to be heated by microwaves
• CPC Class Codes: B65D 2581/3444 Packages having devices which convert microwave energy into movement
• CPC Class Codes: B65D 5/0005 of variable capacity
• CPC Class Codes: B65D 5/2028 triangular
• CPC Class Codes: B65D 5/4295 Ventilating arrangements, e.g. openings, space elements
• CPC Class Codes: B65D 5/5445 for dividing a tubular body into separate parts
• CPC Class Codes: B65D 5/606 Bags or bag-like tubes loosely glued to the wall of a "tubular" container
• CPC Class Codes: B65D 5/68 Telescope flanged lids
• CPC Class Codes: B65D 81/3453 Rigid containers, e.g. trays, bottles, boxes, cups

Abstract

A package for holding a food product. The package comprises a carton comprising a plurality of panels that extend at least partially around an interior of the carton. The plurality of panels comprises at least two side panels. A tear feature extends at least partially across the plurality of panels for at least partially separating the carton into an upper portion and a lower portion. The package also comprises a liner disposed in the interior of the carton. The liner comprises an expandable region proximate to the tear feature of the carton.

Claims

1. A method of heating a food product in a package comprising:

obtaining a package comprising;

a carton comprising a plurality of panels that extends at least partially around an interior of the carton, the plurality of panels comprising at least two side panels, and a tear feature extending at least partially across the plurality of panels; and

a liner disposed in the interior of the carton, the liner comprising an expandable region proximate to the tear feature of the carton;

at least partially separating the carton into an upper portion and a lower portion at the tear feature; and

heating the package so that the volume of the interior of the carton expands, wherein when the package is heated the expandable region of the liner is expanded and extends between the upper portion of the carton and the lower portion of the carton.

2. The method of claim 1, wherein when the package is heated the upper portion of the carton is moved away from the lower portion of the carton.

3. The method of claim 2, wherein the tear feature comprises a tear strip extending across each panel of the plurality of panels, and the liner comprises an upper region adhered to at least a portion of each panel of the plurality of panels above the tear strip and a lower region adhered to at least a portion of each panel of the plurality of panels below the tear strip.

4. The method of claim 3, wherein the expandable region of the liner extends between the upper region of the liner and the lower region of the liner, and the expandable region comprises a first portion of the liner overlapped with a second portion of the liner so that when the upper portion of the carton is moved away from the lower portion of the carton, the expandable region expands as the first and second portions of the liner unfold.

5. The method of claim 1, wherein the expandable region of the liner is at least partially transparent.

6. The method of claim 1, wherein the at least partially separating comprises activating the tear feature to disconnect the upper portion of the carton from the lower portion of the carton.

7. A method of heating a food product in a package comprising:

obtaining a package comprising;

a carton comprising a plurality of panels that extends at least partially around an interior of the carton, the plurality of panels comprising at least two side panels, and a tear feature extending at least partially across the plurality of panels; and

a liner disposed in the interior of the carton, the liner comprising an upper region, a lower region, and an expandable region proximate to the tear feature of the carton, with the expandable region extending between the upper region and the lower region;

at least partially separating the carton into an upper portion and a lower portion at the tear feature; and

heating the package so that the volume of the interior of the carton expands, wherein the expandable region comprises a first portion of the liner that is folded in face-to-face contact with a second portion of the liner prior to the heating of the package, and during the heating of the package, the first and second portions of the liner unfold.

8. The method of claim 7 wherein the upper portion of the carton is moved away from the lower portion of the carton during the heating the package.

9. The method of claim 7, wherein the upper region is secured to the upper portion of the carton and the lower region is secured to the lower portion of the carton.

10. The method of claim 9, wherein the upper region is secured to at least one panel of the plurality of panels above the tear feature in the upper portion of the carton, the lower region of the liner is secured to the at least one panel of the plurality of panels below the tear feature in the lower portion of the carton, and the expandable region of the liner is free from connection to the carton.

11. The method of claim 9, wherein at least a portion of the upper region of the liner is sealed against another portion of the upper region of the liner in the upper portion of the carton, and at least a portion of the lower region of the liner is sealed against another portion of the lower region of the liner in the lower portion of the container.

12. A method of heating a food product in a package comprising:

obtaining a package comprising;

a carton comprising a plurality of panels that extends at least partially around an interior of the carton, and a tear feature extending at least partially across the plurality of panels; and

a liner disposed in the interior of the carton, the liner comprising an expandable region proximate to the tear feature of the carton, wherein the expandable region comprises a first portion of the liner that is folded in face-to-face contact with a second portion of the liner;

at least partially separating the carton into an upper portion and a lower portion at the tear feature; and

heating the package so that the volume of the interior of the carton expands, wherein the first and second portions of the liner at least partially unfold during the heating of the package.