Box with reinforced closure

A box comprising a body having a front panel and a rear panel interconnected by two side panels, the side panels and the front and rear panels being made by folding a sheet material, the body of the box having at least one opening with an associated closure device, said closure device comprising two side flaps each extending the respective lateral panel via a respective fold, each side flap having a front edge situated adjacent to the front panel, the closure device also comprising a closure flap formed to extend the rear panel, said closure flap having a cover-forming portion for folding down onto the side flaps and a tongue for inserting between the front panel and the front edges of the side flaps when the closure device is in its closed configuration, the tongue having an inside face situated facing the rear panel when the closure closure device is in its closed configuration, the tongue including at least one abutment-forming surface beside the inside face of the tongue and suitable for projecting beneath the side flaps when the closure device is in its closed configuration, wherein the abutment-forming surface is constituted by an extra thickness of the tongue.

A box comprising a body having a front panel and a rear panel interconnected by two side panels, the side panels and the front and rear panels being made by folding a sheet material, the body of the box having at least one opening with an associated closure device, said closure device comprising two side flaps each extending the respective lateral panel via a respective fold, each side flap having a front edge situated adjacent to the front panel, the closure device also comprising a closure flap formed to extend the rear panel, said closure flap having a cover-forming portion for folding down onto the side flaps and a tongue for inserting between the front panel and the front edges of the side flaps when the closure device is in its closed configuration, the tongue having an inside face facing the rear panel when the closure device is in its closed configuration, the tongue including at least one abutment-forming surface beside the inside face of the tongue and suitable for projecting beneath the side flaps when the closure device is in its closed configuration, wherein the abutment-forming surface is constituted by a portion of the tongue that is folded down onto itself, said side flaps being independent of the closure flap and said side flaps being arranged to fold down into the opening of the body of the box without overlapping each other.