Carton end closure and reinforcing construction

摘要

In a carton of the type wherein a supplemental reinforcing panel is disposed within the carton immediately rearwardly of the front panel, with the supplemental reinforcing panel being hingedly connected to a first bottom dust flap which is hinged to one of the carton side panels, and a second bottom dust flap is hinged to the other of the carton side panels, locking shoulders are provided on the bottom dust panels for engagement with locking slots on the carton bottom panel, thereby providing a double lock for the bottom panel to create a stronger box closure.