Cabinet structure and method of assembly

Claim 1

PREFABRICATED SHELVING COMPRISING: A PAIR OF NORMALLY UPRIGHT SIDE PANELS, A NUMBER OF NORMALLY HORIZONTAL SHELVES HAVING END EDGES AND MOUNTING TONGUES PROJECTING FROM SAID END EDGES, RESPECTIVELY, EACH MOUNTING TONGUE HAVING NORMALLY UPPER AND LOWER SIDES AND A GROOVE IN ONE OF SAID SIDES EXTENDING PARALLEL TO THE ADJACENT END EDGE OF THE RESPECTIVE SHELF, EACH TONGUE GROOVE HAVING A WIDTH AT LEAST SUBSTANTIALLY EQUAL TO THE THICKNESS OF A SIDE PANEL AND BEING BOUNDED ALONG ITS INNER SIDE BY A WALL DISPOSED APPROXIMATELY IN THE PLANE OF THE ADJACENT END EDGE OF THE RESPECTIVE SHELF, WHEREBY EACH TONGUE HAS A GIVEN THICKNESS DIMENSION AT ITS RESPECTIVE GROOVE AND A GREATER THICKNESS DIMENSION OUTBOARD OF ITS RESPECTIVE GROOVE, SAID SIDE PANELS HAVING SLOTS EXTENDING TRANSVERSE TO THE LENGTH THEREOF FOR RECEIVING SAID MOUNTING TONGUES, RESPECTIVELY, THE WIDTH OF EACH SLOT BEING AT LEAST SUBSTANTIALLY EQUAL TO SAID GIVEN THICKNESS DIMENSION AND LESS THAN SAID OUTBOARD THICKNESS DIMENSION OF ITS RESPECTIVE MOUNTING TONGUE, AND EACH SIDE PANEL INCLUDING LATERALLY RESILIENT ELEMENTS NORMALLY DISPOSED IN THE PLANE OF THE RESPECTIVE PANEL AND HAVING FREE END EDGES BOUNDING THE RESPECTIVE PANEL SLOTS ALONG AT LEAST ONE LONGITUDINAL SIDE OF EACH SLOT, WHEREBY SAID RESILIENT ELEMENTS MAY BE LATERALLY DEFLECTED FROM THE PLANE OF THEIR RESPECTIVE SIDE PANEL TO ACCOMODATE INSERTION OF SAID MOUNTING TONGUES INTO SAID SLOTS AND RELATIVE MOVEMENT OF SAID SIDE PANELS AND SHELVES TO FINAL POSITIONS OF ASSEMBLY WHEREIN ONE LONGITUDINAL SIDE EDGE OF EACH SLOT ENGAGES IN THE GROOVE OF THE ADJACENT MOUNTING TONGUE AND SAID RESILIENT ELEMENTS ARE DISPOSED IN THE PLANE OF THEIR RESPECTIVE SIDE PANEL.