Abstract: A sorting and collating apparatus for sorting sheets from a reproduction machine capable of producing simplex or duplex copies, comprising an array of regularly spaced trays fixedly mounted on a suitable frame, a sheets conveyor extending along first and second paths parallel to the opposite sides of the array respectively, a deflector for deflecting sheets to the first path of the conveyor or the second path of the conveyor depending on whether a simplex or duplex sorting is selected, first and second delivering devices connected together and mounted on said conveyor for delivering a transported sheet to a selected tray from either side of the array and a single device for incrementally moving the first and second delivering devices along the array in opposite direction.