Overhead conveyors These material-handling systems, although accompany-ing the load units, however allow for temporary removal from the line, avoiding, among other things, any accumulation of packages for the successive warehouse operations (see Figure 5.12b).....
Automated guided vehicle systems They are material-handling systems that use mobile robots (vehicles) with three or four wheels (see Figure 5.13), which move automatically, without a driver on board, inside a warehouse. These vehicles are fuelled by a system of batteries that supply energy to an electric motor and are driven by a numerically controlled machine that enables them to move along precise and easily programmable routes.