The feed of items from the discharge end of a fixed conveyor on to a second conveyor which is mounted for longitudinal movement relative to the first conveyor to achieve an equal spacing of the items on the second conveyor irrespective of the relative positions of the first and second conveyors is controlled...http://www.google.fr/patents/US4008796?utm_source=gb-gplus-shareBrevet US4008796 - Control method for feeding items on a conveyor
