The IMP.A.C. 21 A is used in high productions where capacity exceeds 1500 cartons-bundles/h. The high production (max. 2400 cartons-bundles/h) and the great flexibility of palletising cartons with dimensions from a min. of 200x150x25 to a max of 500x400x300, allow this type of palletizer to be widely used in all industrial sectors. The cartons coming from an upstream line is oriented according to the pre-set formation and sent into the layer pre-forming area. The layer thus composed is transferred onto a platform with a central opening, which, upon opening, deposits the layer on top of the pallet carried in the loading position by the lifter, which positions it by means of a photoelectric barrier. The cycle will repeat itself until the completion of the pallet, which will be evacuated and replaced, to start a new cycle. All the synchronisms of the movements are coordinated by a programmable modular system (PLC). The machine can be programmed to palletize cartons of different sizes, formations and number of layers.