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US 6,283,364 B1Granted
Positive locking clamshell
AssigneeWestvaco Corporation
InventorLarry D. Gray, Sr.
Life of this patent
Estimating the term…
Abstract
A clamshell container for disposable, single-use applications comprising a reinforced positive locking closure that includes an inverted tab closure element located within the front wall of one compartment thereof, and a slot cutout located within the front wall of a corresponding compartment thereof.
Claims7
A clamshell container comprising:
- a) a tray having a bottom panel and upstanding front, side and rear tray walls, wherein the front tray wall includes a fold line forming an extension of said front tray wall;
- said tray having a slot cutout located therein;
- and
- b) a lid having a top panel and downwardly extending front, side and rear lid walls, wherein the front lid wall includes a fold line creating an extension of said front lid wall, said extension having a tab element located therein such that when the extension is folded toward the interior of the container, the tab element is inverted to provide an inverted tab locking means;
- said clamshell container having a positive locking closure means, which is provided by engagement of the slot cutout with the inverted tab locking means.
2 more elements
A blank for forming a clamshell container comprising a first portion for forming a lid portion, a second portion for forming a tray portion, and a score line or perforation connecting the first portion to the second portion;
- said first portion comprising a top panel and front, side and rear lid walls, said front lid wall having an extension that includes a tab locking means as a first positive locking closure means;
- and the second portion comprising a bottom panel and front, side and rear tray walls, said front tray wall having an extension that includes a slot cutout as a second positive locking closure means.
Dependencies are inferred from the claim text.