Stackable storage bin

Claim 1

A stackable bin including rear and sidewalls extending upwardly from a bottom wall and sloping slightly outwardly so that the interior size of said bin decreases slightly from the top toward the bottom thereof, outwardly extending flanges adjacent the bottom edges of said sidewalls extending along substantially the full length of said bin, said rear and sidewalls being stepped outwardly adjacent the top of said bin to provide support shoulders, the distance across said shoulders on said sidewalls being substantially the same as the distance between the outer edges of said flanges so that said flanges on an upper bin are supportable on said shoulders of a lower bin, projections extending inwardly from said sidewalls above said shoulders generally parallel thereto and in forwardly spaced relationship to said rear wall, generally vertical ribs extending outwardly from said sidewalls and upwardly from said flanges, said ribs on an upper bin stacked upon a lower bin being located closely adjacent said projections on the lower bin and between said rear wall and said projections on the lower bin to block forward sliding movement of the upper bin relative to the lower bin, and said flanges on the upper bin being received beneath said projections on the lower bin to block vertical separation of the bins, whereby the same said projections which cooperate with said ribs also cooperate with said flanges to perform the dual function of blocking vertical separation and forward sliding movement of an upper bin relative to a lower bin.