These generally fall into one of two categories:
The first type is using pneumatically operated multi stage ejectors to generate the vacuum, suitable for non-porous and lightweight applications. These ejectors can be fitted with quick release valves and also reverse blow off for fast placement.
The second type is using a side channel blower to generate a lower level of vacuum with a much higher airflow, these are more suitable for porous and heavy duty applications.
Vacuum grippers can carry out multi functions such as product palletising, layer pad handling and pallet handling. A combination of additional features allow for re-spacing of products for acetate loading.