Flexible hinge clamshell food service package

• US 8,733,626 B2
• Filed: 01/18/2011
• Issued: 05/27/2014
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: Pactiv Packaging Incorporated (Pactiv)
• Original Assignee: Pactiv Packaging Incorporated (Pactiv)
• Inventors: Learn, Angela E.
• Primary Examiner(s): Elkins, Gary
• Assistant Examiner(s): DEMEREE, CHRISTOPHER R
• Application Number:
  US12/929,342
• Publication Number:
  US 20110315753A1
• Time in Patent Office: 1,225 Days
• Field of Search: 229/124, 229/100, 229/902, 229/407, 229/905, 229/938, 229/107, 229/142, 229/77, 220/890, 206/551, 206/45.25
• US Class Current: 229/145
• CPC Class Codes: B65D 2585/366 Pizza
• CPC Class Codes: B65D 5/2023 the folded-up portions being folded along non-rectilinear fold-lines
• CPC Class Codes: B65D 5/667 Lids in the form of an inverted tray

Abstract

There is herein described a disposable clamshell food service package which includes a novel flex-hinge panel between the lid and bottom of the package. This construction permits the package to open easily when the lid is pushed upwardly resulting in a flat tray like configuration devoid of the typical upstanding wall or divider and which may be used as a serving plate by the consumer. The container may be easily snapped closed and locked to allow later consumption of any uneaten food products.

Claims

1. A foldable clamshell food service container formed from a single blank of paperboard material or the like, comprising;

a lid and a base, an intermediate panel joining said lid and said base, the intermediate panel forming the rear wall of the container;

a fold line between the intermediate panel and each of the lid and the base;

said fold lines each having an arcuate portion at opposite ends thereof extending to and intersecting at a point adjacent to and spaced from opposite sides of the lid and the base, said intermediate panel forming a flexible hinge construction with each of the lid and base, said container when open having a flat configuration to serve as a tray.

2. The container as defined in claim 1, wherein said lid and base each having locking means adapted to interengage with each other to lock the container in a closed position.

3. The container as defined in claim 2, wherein said locking means includes hooks on one of the lid or base and recesses to receive said hooks on the other of the said lid or base.

4. The container as defined in claim 1 and further including side sections extending laterally from each side of each of said lid and base, said side sections adapted to overlap one another when the container is closed to provide the sides of the container.

5. The container as defined in claim 4, wherein said side sections taper outwardly from a point where the side sections on the lid and base join each other, the arcuate portion of said fold lines meeting where the side sections join each other.

6. The container as defined in claim 4, wherein said side sections taper inwardly from a point where the side sections on the lid and base join each other, the arcuate portion of said fold lines intersecting adjacent to and spaced from where the side sections join each other.

7. The container as defined in claim 4, wherein, the point at which the arcuate portion of said fold lines intersect is adjacent to and spaced from where the side sections join each other.

8. The container as defined in claim 1 and further including flap means extending from each of said lid and base and adapted to overlap each other when the container is closed to provide a front surface of the container.

9. The container as defined in claim 1, wherein said fold lines are perforated along a portion of their length to provide venting for the container.

10. A blank for forming a flexible clamshell food service container, said blank being preformed from a flat sheet of paperboard, said blank being scored laterally adjacent its center by a pair of opposed spaced apart fold lines each having an arcuate portion at opposite ends thereof, a lid portion of the blank located above one of the fold lines defining a lid of the container, a base portion of the blank located below the other fold line defining a base of the container, a pair of generally longitudinal score lines on opposing sides of each of said lid and base portions of said blank spaced inwardly of the opposing sides thereof to define foldable sides of the container, the arcuate portions of each fold line extending to and intersecting at a point adjacent to and spaced from the opposing sides of said lid and base portions of said blank.

11. A blank as defined in claim 10, wherein the opposing sides extend outwardly from the center of the blank.

12. A blank as defined in claim 10, wherein the opposing sides extend inwardly from the center of the blank.

13. A blank as defined in claim 10 and further including flap portions extending from each of said lid and base portions of said blank.

14. A blank as defined in claim 13 and further including a locking hook formed adjacent the end of said flap portion that extends from either of said lid or base portion of the blank.