Overview of linear sorter systems

1. April 2025

The linear sorter, also known as a shoe sorter, is an automated sorting and distribution system on which goods are transported and distributed to their intended stations by a sliding mechanism.

This sorting and distribution system is a continuous material handling system. The inventory is transported from A to B on an automatic, continuously running conveyor belt. However, in a large warehouse, there are more than just two stations to which the inventory can be transported. Depending on the situation, different goods are distributed to different storage areas for storage or shipping.

How the linear sorter works

The process is comparable to that of a large main road with many different junctions. The conveyor belt is always in motion and the individual goods turn into the junctions assigned to them. The junctions have different functions depending on the warehouse. For example, the goods are sorted by order, for picking or delivery. In another case, the inventory is sorted by type if the products are to be put into storage. The system scans the inventory or measures the weight and/or dimensions of the respective item before each turn and uses this information to determine whether the inventory must turn at that turn or whether it should continue on the main conveyor belt. If the inventory is to be pushed onto the diverting conveyor belt, the push-off elements extend. These are located between the rollers of the conveyor belt or above them and therefore have no influence on the conveyor belt when not in use. The shoes then move back and the inventory is on its way. The entire sorting and distribution system does not have to be stopped for this process.

The linear sorter is designed for goods with smooth surfaces (boxes or containers) and has a speed of approximately 3m/s. In addition to the linear sorter, there are other types of sorting and distribution systems, such as carousel sorters, tilt tray sorters or drop flap sorters.

More information about sorting systems can be found at Circular Sorter.

More information about conveyor aids can be found under Conveying Aids.