1) Shoe sorter conveyor
The conveying surface consists of continuously linked slats. The linked slats move in a manner similar to a belt. Between each slat, along one side, there is a shoe that moves along with the slats. Each shoe is capable of simultaneous independent lateral movement from one side of the conveyor to the other at the same time as it continues to move forward. At the appropriate time, controls sequence as many shoes as necessary, depending on the size of the load, to move from one side of the conveyor to the other, contacting the side of the load, thus directing the load to one of multiple discharge or take-away lanes. The take-away lanes can be powered by gravity. At the end of the run, after the last take-away lane, and on the return (remember the main sort lines move like a belt), the shoes are all reset to their original side. Such sorters are capable of higher sort rates in the range of 150 cases per minute. Another name for this type of sorter is surfing sorter .