Reinforced spring hinge box

Claim 1

IN A BOX OF CARDBOARD OR SIMILAR MATERIAL, A BODY SECTION AND A COVER SECTION, EACH HAVING SIDE AND REAR WALLS WITH THEIR EDGES ABUTTING, MEANS FOR REINFORCING AND HINGEDLY ATTACHING SAID SECTIONS TOGETHER COMPRISING A RIGHT ANGULARLY FORMED SHEET METAL MEMBER FITTED TO THE JUNCTURE OF THE SIDE AND REAR WALLS OF EACH SECTION AND EXTENDING ALONG THE INNER SURFACE OF THE SIDE AND REAR WALLS OF EACH SECTION, SAID MEMBER HAVING A PLURALITY OF INTEGRAL PROJECTIONS EMBEDDED IN THE WALLS OVER WHICH IT EXTENDS WITH THE FREE ENDS OF THE PROJECTIONS DEFLECTED IN A PLURALITY OF DIFFERENT DIRECTIONS AND CLENCHED OVER THE OUTER SURFACE OF THE SAID WALLS FIRMLY SECURING THE MEMBER TO THE SECTION, INWARDLY EXTENDING PRONGS ON THE PORTION OF THE MEMBER EXTENDING ALONG THE REAR WALL OF EACH SECTION, A HINGE HAVING PLATES WITH OPENINGS RECEIVING SAID PRONGS, WITH THE PRONGS BENT OVER THE INNER SURFACE OF THE PLATES, SAID PLATES EACH HAVING AN OPENING PROVIDING A LIP, AND AN ARCUATE SPRING WITH INTURNED ENDS ENGAGING SAID LIPS AND URGING THE PLATES AND THE MEMBERS ATTACHED THERETO IN AN OPENING OR CLOSING DIRECTION DEPENDING ON THE RELATIVE POSITION OF SAID PLATES.