A memory address decoding method for determining if a given address is located in one of a plurality of sections. A composite product is formed for use as or in forming a feedstock in plastics manufacture may be broken down under heat and mechanical shearing in a plastics extrusion machine to release the major fraction of the fibers, or the product may be useful as an intermediate product in other form or as an end product. The frame can be shifted between an open configuration in which the bag is opened so that it can be filled, and a folded configuration. The anchor member includes a plurality of stations defined by passageways transversing the anchor member and extending from the anchor member top towards the anchor member base. The negative feedback insures that the thyristor only operates at its breakover boundaries of the latching condition with the NPN transistor portion of the thyristor operating in the active region. An impact on one side of the structure will compress that side, increasing the pressure of the gas between that side and the baffle.