Originally Posted by
Efrem
As a suitcase on the circulating belt approaches the place where newly arrived suitcases fall onto the belt, it breaks a light beam. If there is a suitcase about to fall onto the belt, a photocell-activated switch stops the conveyor belt carrying the new suitcases, perfectly timed so a new suitcase never falls down onto one that has come full circle.
Haven't seen it in 471 airports; saw one for the first time at MAD (T4) last month. It's a bit misleading...we all know that gorillas have been throwing our bags around behind the wall, so why pretend that bags are treated gently just because we are watching?