| 摘要 |
A corner lock carton exhibiting improved lock retention includes a base panel, a pair of wall panels, and a locking flap panel joined to one of the wall panels. The other wall panel includes a locking slit formed inwardly thereon to receive the locking flap panel. The slit has a vertical segment, a horizontal segment, and an angled segment connecting the vertical and horizontal segments the ends of the angled segments being disposed at an angle of 40 DEG to the vertical segment. The flap panel includes a lock member having a first edge portion aligned parallel to the vertical segment of the slit when the carton is erected and a second edge portion disposed at an angle of 45 DEG to the first edge portion. When the wall panels are erected, the lock member is disposed through the slit, and the second edge portion of lock member engages the slit at a point adjacent the juncture of the vertical segment and the angled segment to securely interlock the flap panel and slit together. The angled slit segment and the angled edge of the lock member have an angular separation of at least five degrees when interlocked. [Since the point of interlocking engagement is adjacent the base of the lock member and the intersection of the vertical and angled segments, when pressure is applied to the side panels, the point of interlocking engagement does not shift. In one embodiment, the angled segment is formed having an arcuate shape to provide a "double-locking" retention feature. |
