Abstract: Machines for sorting objects having a series of carriages fixed at a given interval (P) to two drive belts configured to move along closed-loop paths in two parallel vertical planes are provided. Each path may include a top horizontal section and a bottom horizontal section joined together by two curved connecting end sections. Two end assemblies may be arranged at the curved end sections of the path. Each assembly may include crown gears which are configured to engage with the belts and a series of sliders which are configured to retain the carriages along a semicircular section close to the crown gears. The carriages are thus able to perform a rotary/translational movement along the end connecting sections and keep their support surface horizontally oriented.