Stackable and nestable container

Claim 1

AN INTEGRALLY FORMED STACKABLE AND NESTABLE CONTAINER OF SHEET MATERIAL OF UNIFORM CROSS-SECTION THROUGHOUT COMPRISING INTEGRAL OPPOSITELY DISPOSED SIDE AND END WALLS AND A BOTTOM WALL INTERCONNECTING THE SIDE AND END WALLS, SAID SIDE AND END WALLS DIVERGING UPWARDLY AND OUTWARDLY FROM SAID BOTTOM WALL AND TERMINATING IN A FLANGE CONNECTING THE MARGINAL EDGES OF SAID SIDE AND END WALLS, ONE CONTAINER END WALL HAVING AN OUTWARDLY OFFSET SHELF FORMING RECESS THEREIN, SAID RECESS INCLUDING BOTTOM, SIDE AND END WALLS, THE BOTTOM WALL BEING DISPOSED BELOW THE MARGINAL FLANGE AND MERGING INTO THE SIDE WALL THEREOF, SAID RECESS SIDE WALL BEING DISPOSED OUTWARDLY OF THE CONTAINER END WALL AND MERGING INTO SAID MARGINAL FLANGE, THE END WALLS THEREOF TERMINATING INWARDLY OF THE CONTAINER SIDE WALLS, SAID CONTAINER SIDE WALLS EACH INCLUDING ADJACENT THE OTHER CONTAINER END WALL AN INWARDLY OFFSET PORTION EXTENDING THE ENTIRE HEIGHT OF THE SIDE WALLS AND DEFINED BY ANGULARLY DISPOSED SHOULDERS EXTENDING FROM ADJACENT THE BOTTOM WALL TO SAID MARGINAL FLANGE, SAID OFFSET PORTION BEING OF GREATEST LENGTH ADJACENT THE JUNCTURE WITH THE BOTTOM WALL AND OF LESS LENGTH AT THE JUNCTURE WITH THE SAID FLANGE TO PERMIT NESTING OF SUPERIMPOSED IDENTICAL CONTAINERS, EACH OF SAID OFFSET PORTIONS OF THE SIDE WALLS INCLUDING AN OUTWARDLY EXTENDING SHELF FORMING RECESS, EACH RECESS INCLUDING BOTTOM, SIDE AND END WALLS, SAID RECESS BOTTOM WALL BEING DISPOSED BELOW THE MARGINAL FLANGE AND MERGING INTO SAID SIDE WALL THEREOF, SAID RECESS SIDE WALL BEING DISPOSED OUTWARDLY OF THE CONTAINER SIDE WALLS, ONE OF THE SAID RECESS END WALLS TERMINATING SHORT OF THE CONTAINER END WALL, THE OTHER OF SAID RECESS END WALLS MERGING INTO THE INCLINED SHOULDER, EACH OF SAID SIDE AND END WALL SHELF FORMING RECESSES HAVING A LENGTH SEVERAL TIMES THEIR WIDTH AND EACH RECESS INCLUDING A DOWNWARDLY EXTENDING ANTI-WEDGING POST OF LESS WIDTH THAN SAID SHELF RECESS AND OF A HEIGHT AT LEAST TWICE THE DISTANCE FROM THE BOTTOM WALL OF THE SHELF FORMING RECESS TO THE SAID MARGINAL FLANGE, THE EXTERIOR WALLS OF THE POST DIVERGING OUTWARDLY AND DOWNWARDLY IN NON-PARALLEL RELATIONSHIP BOTH WITH THE CONTAINER WALLS AND A TRUE VERTICAL PLANE AND TERMINATING IN A POST BOTTOM WALL, SAID BOTTOM WALL BEING PARALLEL WITH THE RECESS BOTTOM WALLS AND THE MARGINAL FLANGE OF THE CONTAINER AND EXTENDING INWARDLY AND MERGING WITH THE CONTAINER WALLS.