Abstract: A roller type conveyor has a series of rotors on a frame, each rotor being continuously driven and having a pair of spaced discs overlapping the discs of adjacent rotors. The discs have aligned notches for sequentially engaging the parts and carrying the parts to the next rotor downstream where they are picked up for another movement when the notches of the downstream rotor engage the parts. Gates journaled on each rotor have levers which are actuated by a part on a rotor to move stops into the path of part movement to prevent pickup of a second part by a rotor as long as the rotor is occupied.