The palletizer IMP.A.C. 11-12 APT with pallet on the ground, is suggested for the low and medium productions (max.500 bags/h) of bags and bundles. Because of its compactness this machine can be placed in small environment. This kind of palletizer is a modular construction, it allows to increase with the customer requirements. It can be completed with the roller conveyors and the empty pallets magazine. The bag, coming from an upstream line, is pressed to become even and compact, then it’s oriented following the preset formation and directed to the preforming zone. The composed layer is transferred on a vertically and horizontally moving platform, the first one for the search and the positioning of the layer unloading, the second one for the transferring of the layer on the firm pallet. The cycle will repeat itself until the finishing of the  pallet that will be emptied and replaced, to begin a new cycle. All the movements synchronisms are coordinated by a programmable modular system (PLC). The machine can be programmed to palletize bags of different dimensions, formations and layers number.