Plastic packaging box for packing butter, has ring integrated to tank limitedly at level of radial protrusion managed under free upper edge of tank, where protrusion extends from lateral wall defining tank

摘要

The box has a tray or tank (1) blocked by a cover (2). The cover is integrated to a peripheral ring (4) connected closely to a free upper edge (5) of the tank. The cover is articulated on the ring. The ring is integrated to the tank limitedly at level of a radial protrusion (10) managed under the upper edge of the tank. The protrusion extends from a lateral wall defining the tank. The ring is constituted of a skirt supported on the protrusion.