Convertible file for sheet materials

Claim 1

A CONVERTIBLE FILE FOR VERTICAL STORING OF SHEET MATERIAL, COMPRISING: A HOUSING HAVING AN OPEN FRONT WITHOUT INTERMEDIATE CROSS SUPPORTS AND CONFORMING GENERALLY WITH THE PROPORTIONS OF A MULTI-DRAWER VERTICAL FILE; A CONVENTIONAL SUSPENSION SYSTEM SECURED TO THE INNER WALL SURFACES OF THE OPPOSITE SIDES OF SAID HOUSING HAVING MATERIAL SUPPORTING BARS AND ADAPTED TO MOVE THE SUPPORTED MATERIAL ENTIRELY OUT OF SAID HOUSING; A TOP BAR HAVING MEANS AT EACH END TO BE ENGAGED OVER THE TOP OF SAID SUPPORTING BARS AND HAVING MEANS FOR SUPPORTING AND POSITIONING FLAT SHEETS FOR STORAGE; A RIGID FRONT CLOSURE ELEMENT OF SHEET MATERIAL OF A SIZE TO FILL THE SAID OPEN FRONT USED BY SAID SUSPENSION SYSTEM AND THE MATERIALS IT SUPPORTS; SAID FRONT CLOSURE ELEMENT HAVING A DOUBLE LOCKING BOLT MEANS FOR SECURING SAID FRONT CLOSURE ELEMENT TO SAID MATERIAL SUPPORTING BARS AND A HANDLE SECURED TO THE OUTER SURFACE OF SAID CLOSURE ELEMENT FOR MOVING SAID LOCKING AND SUSPENSION SYSTEM.