Devices and methods for treating an abdominal incision or hernia are described. A gate signal line driving circuit is placed in parallel with a source signal line driving circuit, so that no driving circuits are provided in at least two opposing directions out of four directions with respect to a pixel region. A controller is operatively connected to the baffle and adapted to cause the baffle to increase or decrease the hopper opening into the truck-unloading conveyor. An attachment assembly is positioned over the housing connection flange and air filter member connection base to releasibly attach the air filter member to the air filter housing. The processed search results are returned to the user. The method comprises the steps of providing a feed screw with a plurality of pins extending from an outer diameter of the feed screw and providing an agitator with a plurality of pins extending from an outer diameter of said outer diameter.