Torque-resistant closure for a hermetically sealed container

摘要

An improved closure insert (20) is provided for throat region (14) of a blow-moulded container (10). This closure insert (20) is provided with a scabrous perimeter (28) and is permanently molded into the container throat region (14) during container formation from a parison. The resulting seal resists loosening or disturbance when off-axis force or torque force is applied to the closure insert (20) during container opening. The closure insert (20) can be a subassembly constituted by removable parts that provide a variety of access options to the container contents.