Bags are typically filled by a valve pack machine or other upstream filling and sealing equipment. They are then placed on an outfeed conveyor and conveyed to a palletizing system. Optional check weighing, bag flattening, bag labeling, or bag squaring equipment can be utilized to reduce order inaccuracies and increase load stability.
Once the bag reaches the robotic palletizer, a "clam" style gripper picks up the bags without puncturing them and places them on the pallet. An interlocking pattern and tier sheets can be applied to the load in order to increase load stability. Once a load is complete, it can be picked up by a fork lift operator or conveyed automatically to a stretch wrapper. Finally, a new pallet is presented to the robot manually or via conveyance from a pallet dispenser.