(57) A folding container such as a tray, carton or the like constructed of paperboard
includes a interior end panel (22) articulated to a bottom wall panel (12) and including
a relief slit (44) to ensure full engagement of a thread and punch lock on first and
second end panels (26, 30) articulated to opposite sidewall panels (14, 16). The first
locking end panel (26) includes a locking assembly comprising a tongue (34) and cooperating
locking tab (38). The second locking end panel (30) includes a receipt aperture (40)
for the lock assembly. When locked in overlapping relation, the tongue and tab are
respectively threaded and snapped into the receipt aperture to provide secure engagement.
The relief slit is substantially U-shaped with the open end of the U directed toward
the lock assembly receipt aperture when the end panels are in overlapping relation.
The relief slit extends substantially around the tab engaging edge of the lock assembly
receipt aperture so as to provide sufficient relief for the full and complete engagement
of the locking tab.
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