Abstract: A tray turner for a conveying system which includes a conveyor for moving trays having hand openings on two opposite sides. A tray sensor detects whether the trays are properly oriented, and a turning station is located downstream from the tray sensor for turning those trays which are not properly oriented. The tray sensor detects the proper orientation by moving an arm along the adjacent side of the tray as it moves past the sensor to detect the hand opening and identify the half tray in an incorrect position. The turning section receives signals from the sensor and moves a tray rotator pin into the path of the nearest corner of a mis-aligned tray for momentarily intercepting such tray and moving it angularly 90 degrees into a position in which such tray is facing in the correct direction. The mis-aligned half trays abut against the rotator pin. There is a longitudinal guide immediately upstream from the tray rotator pin.