Tamper evident plastic food container
AssigneeAnchor Packaging, Inc.
InventorKevin Krueger
Life of this patent
Estimating the term…
Abstract
A method of thermoforming a container includes forming a lid having a lid rim, and forming a base including a base rim. The method also includes forming a foldable section that joins the lid rim and the base rim and includes a lid hinge panel extending from the lid rim to a hinge and a base hinge panel extending from the base rim to the hinge. The method also includes forming a frangible line that extends from an edge of the lid hinge panel, across a portion of the lid hinge panel to a first point, from the first point across the lid hinge panel to the hinge, across the hinge, across the base hinge panel from the hinge to a second point on the base hinge panel, and from the second point across a portion of the base hinge panel to an outside edge of the base hinge panel.
Claims19
A method of thermoforming a tamper evident container comprising:
- forming a lid from a portion of a single sheet of plastic material, the lid having a lid rim;
- forming a base from a portion of the single sheet, wherein the base includes a base rim defining a periphery of the base;
- forming a foldable section from a portion of the single sheet, wherein the foldable section joins the lid rim and the base rim and the foldable section includes a lid hinge panel extending from the lid rim to a hinge and a base hinge panel extending from the base rim to the hinge;
- forming a frangible line that extends:
- a) from an outside edge of the lid hinge panel and longitudinally across a portion of the lid hinge panel to a first point;
- b) from the first point transversely across the lid hinge panel to the hinge;
- c) across the hinge in a manner that transects the hinge and then transversely across the base hinge panel from the hinge to a second point on the base hinge panel;
- and
- d) from the second point longitudinally across a portion of the base hinge panel to an outside edge of the base hinge panel.
A method of forming a tamper evident container comprising:
- forming a lid having a lid rim, a base having a base rim, and a foldable section that joins the lid rim and the base rim and includes a lid hinge panel extending from the lid rim and a base hinge panel extending from the base rim, the foldable section having a first side edge and a second side edge that each extend between the lid rim and the base rim, and a hinge line that hingedly connects the lid hinge panel and the base hinge panel, wherein the hinge line extends between the first side edge and the second side edge;
- and
- forming a frangible line on the foldable section that extends between the first side edge and the second side edge and, in extending between the first side edge and the second side edge, the frangible line transects the hinge line.
Dependencies are inferred from the claim text.