METHOD AND APPARATUS FOR EFFECTING RELATIVE MOVEMENT OF CONTAINERS

摘要

A head block assembly (105) comprising a first head block (120) having a first pair of cable engaging sheaves (130); a second head block (125) having a second pair of cable engaging sheaves (135); a separation device (140) mounted intermediate the first and second head blocks (120, 125), for effecting relative transverse movement of said head blocks; wherein the first pair of sheaves (130) are selectively disengagable from the first head block (120), and selectively engagable with the second head block (135).