Trailer unloading apparatus and method

Apparatus for selectively compartmentalizing a rectangular container, for transporting comminuted bulk material, having a planar floor provided with discharge openings therein and side and end walls extending upwardly from the floor comprising:

• a plurality of collapsible rectangular liners, each said liner having side walls and end walls substantially coextensive in height with the container side and end walls, and having a collapsible funnel-shaped base adapted to extend below said side and end walls of said liner, said base being further adapted to communicate with a discharge opening in the planar floor;
• means to selectively position said liners within the container with said side and end walls of each said liner substantially extended and said base collapsed upon the planar floor, and communicating with a corresponding discharge opening, to permit each said liner to receive material;
• and,
• means to selectively bodily lift at least one said liner and extend said funnel-shaped base to facilitate gravity discharge of material through a corresponding discharge opening, said means being attached to opposite sides of said liner along the junction between its side walls and the funnel-shaped base.