Thermal reservoir type work support

Claim 1

IN APPARATUS FOR SUPPORTING A GLASS SHEET FOR THERMAL TREATMENT COMPRISING AN ELONGATED RAIL EXTENDING CIRCUMFERENTIALLY ABOUT SAID APPARATUS AND ENCLOSING AN AREA SIMILAR IN OUTLINE TO AND SLIGHTLY SMALLER THAN THE OUTLINE OF THE SUPPORTED GLASS SHEET, SAID GLASS SHEET SUPPORT COMPRISING THE UPPER EDGE SURFACE OF SAID RAIL, AND REINFORCING MEANS CONNECTED TO SAID RAIL AND LOCATED OUTWARDLY OF AND ADJACENT TO SAID RAIL, THE IMPROVEMENT COMPRISING A VERTICAL WALL MEMBER EXTENDING IN SPACED RELATION TO SAID RAIL AND PROVIDED WITH AN UPPER EDGE LOCATED IN A HIGHER HORIZONTAL PLANE THAN THAT OCCUPIED BY SAID GLASS SHEET SUPPORT MEANS, SAID UPPER EDGE EXTENDING FOR A PORTION ONLY OF THE LENGTH OF SAID RAIL, A HORIZONTAL LEDGE MEMBER AT LEAST COEXTENSIVE IN LENGTH WITH SAID VERTIAL WALL MEMBER INTERCONNECTING SAID RAIL AND SAID VERTIAL WALL MEMBER IN A PLANE SPACED BELOW THE UPPER EDGE SURFACE OF SAID RAIL, SAID VERTICAL WALL MEMBER BEING PROVIDE CLEARANCE FOR THE OUTLINE OF THE SUPPORTED GLASS SHEET, YET CLOSE ENOUGH TO SAID RAIL TO HAVE THE THERMAL CAPACITY OF SAID VERTICAL WALL MEMBER AND THAT OF SAID HORIZONTAL LEDGE MEMBER MODERATE THE CHANGES IN TEMPERATURE AT THE EDGE PORTION OF SAID GLASS SHEET ADJACENT THERETO RESULTING FROM SAID THERMAL TREATMENT SO AS TO TEND TO EQUALIE THE TEMPERATURE OF SAID EDGE PORTION WITH THAT OF THE CENTRAL PORTION OF SAID SUPPORTED GLASS SHEET, SAID VERTICAL WALL MEMBER BEING OF SUFFICIENT EXTENT TO COOPERATE WITH SAID HORIZONTAL LEDGE MEMBER TO PROVIDE A HEAT RESERVOIR IN THE VICINITY OF THE OUTLINE OF SAID SUPPORTED GLASS SHEET.