Plastic stacking and transport case

Claim 1

An integrally molded plastic stacking and transport case adapted for assembly and mutual interlock with a number of similar cases in a stack as well as for transport by a wheel conveyor of the type comprising a plurality of equispaced cross rods mounted on side bars and carrying rows of freely rotatable supporting wheels, said case comprising: 1. a rectangular bottom wall having a length-to-width ratio greater than 1 and less than 1.5; 2. side and end walls extending at right angles from said bottom wall; 3. two rows of spaced and aligned rectangular framelike extensions of substantially rectangular cross section and projecting outwardly from said bottom waLl, each said rows comprising three extensions equally spaced from the lengthwise centerline of said bottom wall, to provide a lengthwise channel intersected by a pair of cross-channels bounded by the inner walls of said extensions; 4. said channels having equal widths in excess of twice the thickness of the upper edges of said side and end walls; 5. the outer sidewalls of said extensions being aligned with the inside surfaces of the adjoining side and end walls of the case and the centerlines of each of said cross-channels being spaced from the opposite short sides of said bottom wall by distances equal to the width of said bottom wall and to the difference between the length and width of said bottom wall, respectively; and 6. supporting means within the extensions adjoining the corners of said bottom wall, to provide discrete bearing surfaces for the wheels of said conveyor flush with the outer surfaces of said extensions.