Abstract: An improved stacker for an automatic document sorter is described. The stacker is vertical and receives documents at the top thereof and expels them at the bottom. The stacker includes a paddle normally disposed at the top for receiving the first document and subsequent documents stacked thereon. As documents enter the stacker, the paddle drops due to the action of a timing belt and sensor arrangement until it reaches the bottom. At the bottom, a horizontally directed timing belt withdraws the paddle from the stacker and the paddle is then returned by reverse action to the top of the stacker and reinserted thereinto for receiving the next stack of documents. Both timing belts are independently driven by motors.

Abstract: A portable firefighting training system is provided that is useful in educating people as to proper firefighting procedures using self-contained supplies of fire extinguishing agents such as fire extinguishers and the like. Class A, B or C fires can be simulated through the use of a portable burner assembly and interchangeable mock-ups simulating burning structures.