Gable lid clamshell container

• US 5,791,554 A
• Filed: 06/26/1997
• Issued: 08/11/1998
• Est. Priority Date: 06/26/1997
• Status: Expired due to Fees

• Current Assignee: International Paper Company
• Original Assignee: International Paper ZAO (Sylvamo Corp.)
• Inventors: Jensen, Kurt D.
• Primary Examiner(s): Shoap, Allan N.
• Assistant Examiner(s): Mai, Tri M.
• Application Number:
  US08/883,424
• Time in Patent Office: 411 Days
• Field of Search: 229/146, 229/160, 229/126, 229/148, 229/108, 229/116, 229/115, D 9/430, D 9/431, D 9/433
• US Class Current: 229/148
• CPC Class Codes: B65D 5/665 the lid being held in closed position by self-locking integral flaps or tabs

Abstract

A clamshell type paperboard container formed from a unitary blank of paperboard. Two embodiments are described. In the first, the container is square and the lid includes four triangular panels meeting at an elevated and central common point. In the second, the container in rectangular and the lid includes two triangular panels and two trapezoidal panels, and the central elevated portion of the lid includes an elongated ridge or rib. These constructions prevent stacking and hence inadvertent crushing of a closed and filled container. The slanting sides of the lids yield an easel effect for graphics thereon.

Claims

1. A unitary paperboard blank for forming a gable lid clamshell container, said blank having an upper lid forming portion integrally and foldably connected to a lower, tray forming portion along a common fold line, said tray forming portion including a central bottom panel having a periphery, said central bottom panel including two side walls, a front wall, and a rear wall, said tray walls foldably connected to said bottom panel periphery, said tray front wall having a free edge carrying means for releasably latching said tray to said lid, said lid forming portion including a plurality of generally triangular panels arranged such that an apex of each defines a common point of said lid, one of said lid panels having an edge which is partially collinear with said common fold line and about which said lid is adapted to fold over said tray, two of said lid panels adapted to overlie one another to thereby form a lid having four triangular panels, one of which is a double thickness of said paperboard.

2. The blank of claim 1 wherein said partially collinear lid fold edge is longer than said common lid and tray fold line, whereby said partially collinear fold edge extends beyond both ends of said common lid and tray fold line.

3. The blank of claim 1 wherein a plurality of fold lines and a cut line radiate outwardly from said lid common point, each of said fold lines joining several next adjacent pairs of said triangular lid panels, said cut line separating a next adjacent pair of said triangular lid panels.

4. The blank of claim 3 wherein said lid common point is located generally centrally of said lid.

5. A container formed of a unitary blank of paperboard, said container having a lower tray and an upper lid, said tray having a central bottom panel, side walls, a front wall, and a rear wall, said lid foldably connected to said tray rear wall along a common fold line, said lid including a plurality of triangular panels at least one of which is of a double thickness of said paperboard, one of said lid triangular panels being a rear triangular lid panel and having an edge which is partially collinear with said common fold line, said rear triangular lid panel edge extending beyond both ends of said common fold line.

6. The container of claim 5 wherein said triangular lid panels are arranged such that an apex of each defines a common point on said lid, said common point being above all other portions of said lid, and being above said tray.

7. The container of claim 5 wherein said lid overhangs said tray walls.