Container box closure

Claim 1

A reusable one-piece closure assembly that may be readily installed on a conventional paperboard box to serve as a closable orifice of the box, comprising two members in the form of strips of material which are fastened together at a common end so as to clamp together a side of box lying between the two members when the inner member is pushed through a slit in the side of a box, with the exterior member fitted with a slidable door member to alternately open or close an orifice in the exterior member, said slidable door member and said exterior member fitted with safety latch means to latch the slidable door member in the closed position of the slidable door member, said safety latch means comprising a flexible flat spring strip, one end of which is mounted to the exterior surface of the exterior member to lie between the slidable door member and the exterior member in the open position of the slidable door member, with the other end of the spring strip member projecting, in the closed position of the slidable door member, into a recess in the exterior face of the slidable door member and against a wall of said recess, said slidable door member being freely slidable over said flat spring member when the flat spring member is manually depressed against the exterior member.