[1][2][3] The term pallet inverter is also used to cover machines that turn the palletised load through 90 degrees only.
The primary reason is have access to the bottom of the load without having to manually unload all of the boxes or bags.
Sometimes a manufacturer simply needs to turn their products to stop their contents settling.
Processes can utilize freezer spacers between each tier of boxes on a pallet: these promote air flow for controlled and accelerated refrigeration.
This rotates the load ninety degrees to allow easy removal and reuse.