Patent attributes
A combination of a closing element (28) and a receiving structure (24) is provided wherein the closing element (28) and receiving structure (24) are in an initially assembled orientation which prevents, but which can he subsequently operated to permit, communication through the receiving structure (24). The receiving structure (24) includes at least one laterally projecting shear member (40) and a spout (30) defining (A) an access passage (32). The closing element (28) has an aperture (78) for receiving a shear member (40) of the receiving structure (24). At least one frangible bridge (78) extends across a portion of the aperture (74) for being severed by the shear member (40) during relative rotation between the closing element (28) and the receiving structure (24).
