A pallet inverter or pile turner is a machine that is used to turn over pallets whilst still loaded with products. The reasons for needing to turn over a pallet are varied, but one main reason is the need to replace a broken or inappropriate pallet without unstacking the whole load. Sometimes a manufacturer simply needs to turn their products to stop their contents settling. In some industries, it is necessary to transfer goods from one type of pallet to another – for example, when plastic pallets are used for on-site storage and wooden pallets are used for shipping. Pallet inverters can be built into production lines or be used as a stand-alone product. The term pallet inverter is also used to cover machines that turn the palletised load through 90 degrees only. 
- US4295776A, Payne, "PORTABLE INVERTER FOR TRANSFERRING BULK GOODS BETWEEN PALLETS", published 1981
- US2769557A, Ohr, "Skid inverter", published 1956
- Pallet inverters in warehouse settings generally help reduce product damage and potentially workplace injury if used appropriately. "Premier Pallet Inverters: What is a pallet inverter?"
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