#$%^&*AU2012201309A120130919.pdf#####ABSTRACT A head bail assembly comprises a. primary support frame including a base side support members and an overhead member. A pair of bail arms are provided and mounted in opposing relationship and capable of movement responsive movement of an operating member between an open state in which a through passage is created between the bail anns and a closed state in which the passage is at least partially blocked by the bail arms. An actuating assembly is provided for operating the opening and closing of the bail arms. The actuating assembly is connected at first and second locations on the primary support frame and including an auxiliary assembly connected to a lifting arm and a bail arm operating assembly respectively associated with each bail arm. The bail arm operating assemblies are arranged so that when the actuating assembly is actuated the auxiliary assembly activates the bail arm. operating assemblies to urge the bail arms between the open state and closed state. 22
