AN INTERLOCKING ARRANGEMENT

摘要

There is provided an interlocking arrangement for coupling two pieces (10, 11) of paperboard. Projecting portions (17) on one piece (10) and openings on the other piece (11) act as guide means. Locking means comprising parallel sided flaps (20) hinged to said one piece (10) and tongues (24) on said other piece (11) are provided, said tongues (24) being pushed past the flaps (20). The free ends of the tongues (24) are bent back slightly and the flaps (20) engage below the bent back ends.