Quick stacking filing trays

A filing tray comprising:

• a substantially rectangular main body having a top surface and a bottom surface defining a plane, first and second longitudinally spaced ends, a front lateral side portion and a rear lateral side portion, said top surface being formed with first and second laterally spaced, elongated grooves adjacent each of said first and second longitudinally spaced ends, said bottom surface being integrally formed with a plurality of longitudinal and lateral ribs;
• first and second end walls laterally from said first and second longitudinally spaced ends extending substantially perpendicular to said bottom surface, each of said first and second end walls including a lateral edge portion spaced from said bottom surface and being integrally formed with first and second, laterally spaced, upstanding rails;
• a back wall extending longitudinally from said rear lateral side portion substantially perpendicular to said bottom surface, said longitudinal back wall being interconnected with said first and second lateral end walls;
• and
• first and second longitudinally spaced side flanges extending from said front lateral side portion oblique to the plane defined by said bottom surface of said main body, said first and second side flanges being longitudinally separated by an opening, whereby the rails of the filing tray can be respectively inserted into the elongated grooves of another filing tray constructed in the same manner so as to permit a plurality of the filing trays to be stacked together.