Apparatus for producing sheet glass

Claim 1

APPARATUS FOR THE CONTINUOUS PRODUCTION OF WINDOW GLASS COMPRISING, IN COMBINATION, A MELTING CHAMBER, A REFINING CHAMBER, AND A COOLING CHAMBER IN END TO END RELATIONSHIP AND DEFINING A CHANNEL ALONG WHICH A STREAM OF MOLTEN GLASS FLOWS INTO A WORKING RECEPTACLE, SAID WORK-A ING RECEPTACLE INCLUDING OPPOSITE SIDE WALLS AND AN END WALL, A SUBSTANTIALLY CLOSED DRAWING CHAMBER OVER THE WORKING RECEPTACLE, A POT CHAMBER BENEATH AND AROUND THE WORKING RECEPTACLE, MEANS FOR SUPPLYING HEAT TO SAID POT CHAMBER TO HEAT THE MOLTEN GLASS IN THE WORKING RECEPTACLE A LIP-TILE EXTENDING TRANSVERSELY OF SAID WORKING RECEPTACLE OVER SAID END WALL FOR SUBSTANTIALLY SEALING SAID DRAWING CHAMBER AGAINST THE ENTRY OF HOT GASES FROM SAID POT CHAMBER, SAID LIP-TILE INCLUDING A CARRIER FRAME MEMBER OF HEAT CONDUCTING MATERIAL EXTENDING ACROSS SAID WORKING RECEPTACLE AND IN CONTACT WITH SAID HOT GASES, AND A SEALING MEMBER OF HEAT CONDUCTING MATERIAL DEPENDING FROM SAID CARRIER FRAME AND EXTENDING INTO SAID MOLTEN GLASS FOR CONDUCTING HEAT FROM SAID HOT GASES INTO SAID MOLTEN GLASS ALONG SAID END WALL WHEREBY DEVITRIFICATION OF THE MOLTEN GLASS IN THE REAR OF SAID WORKING RECEPTACLE IS PREVENTED, AND MEANS FOR DRAWING A GLASS SHEET UPWARDLY FROM THE MOLTEN GLASS IN SAID WORKING RECEPTACLE.