the receiving conveyor 22 the individual grippers 100 are supported on horizontal bars 120 extending between like positions on the two adjacent chains and guided at various times on guides at each end of the bars 120 by cam like slide devices to determine the angular orientation position of the center line of the grippers as suggested in fig1 in region 36 the angular orientation of the bars 120 is further determined by a slide member 42 positioned to intersect and stabilize the bars at the position immediately above the entry to the receiving conveyor 22 as disclosed in the foregoing patent the downward slope of the gripper trajectory in region 44 is the same as the upward slope in region 46 so that by spacing the grippers slightly further apart on the chain than the containers in the cases to be unloaded and by having the linear speed of the chain slightly higher than the linear speed of the cases in accordance with the incline of chain sections 44 and 46 the grippers will generally be accurately aligned with the container positions in the cases both in the downward portion of the trajectory in section 44 and during the container removal portion of the trajectory section 46 the construction of the individual grippers 100 is illustrated in fig2 through 6 fig2 is a view taken along line 2 2 of fig1 illustrating one possible orientation of the.