An automatic document feeder includes a document input tray, a document discharge tray, a pushing member, and an elastic element. The washer includes one or more concentric ribs that are dielectric rings on both sides. After training, the hierarchical statistical model uses observation vectors extracted from a data set to find a substantially optimal state sequence segmentation. The first power lines and the second power lines are arranged on or above the viewing area and are arranged in the same layer as the first electrode layers or below the first electrode layers. Here, it is provided that a control for the input signal correction and a control of the cylinder equalization are activated alternatively by an alternative circuit unit. A screen sealing system including a plurality of shaker screens, each shaker screen having a screen frame and an inflatable sealing element integrally formed with the screen frame, wherein the inflatable sealing elements of each shaker screen are in fluid communication is also disclosed.