Two air assist fans [A] and [B] comprise the air assist mechanism.
The air flow created by the opposing fans floats the first sheet off the top of the stack. This assists in the separation of the top sheet from the sheet below and prevents double-feeding.
This only works when feeding the following paper types: Thick 2, Thick 3, Special 2, Coated Paper 1, Coated Paper 2 and Coated Paper 3.