A particle mixture, illustrated in Figures 1, 2 and 3 falls from the feeder onto the deck. The area immediately
around the feeder is called the STRATIFYING AREA. In this area the vibration of the deck and the lifting
fluidizing action of the air are combined to stratify the material into layers, with heavier layers on the bottom
and lighter layers on the top as shown by Figure 1. Separation cannot occur until the material becomes
stratified. The size of the stratification area will depend on the difficulty of separation and on the capacity at
which the material is being processed. At no time should the stratification area exceed one-third of the deck
surface.