Oven for treating articles

Claim 1

AN ELONGATED OVEN STRUCTURE COMPRISING IN COMBINATION SIDE, END, TOP AND BOTTOM WALLS OF INSULATING REFRACTORY MATERIAL DEFINING A CENTRAL CHAMBER, A PAIR OF SPACED APART PARALLEL ENDLESS REACHES OF CHAIN, A PLURALITY OF CROSS MEMBERS ATTACHED AT THEIR ENDS TO SAID CHAINS FOR CARRIAGE THEREBY, A PLURALITY OF ARTICLE CHUCKS CARRIED ON SAID CROSS MEMBERS FOR HOLDING AND CONVEYING ARTICLES THEREBY, TRANSVERSE SHAFTS MOUNTED NEAR EACH END OF SAID CENTRAL CHAMBER, A PAIR OF SPACED APART SPROCKETS ON EACH SHAFT, AN ENTRANCE TO SAID CHAMBER, AN EXIT FROM SAID CHAMBER, THE SAID PARALLEL CHAINS CONTINUOUSLY MOVING THROUGH THE ENTRANCE, RESPECTIVELY, AROUND SAID SPROCKETS AT OPPOSITE ENDS OF THE CHAMBER AND THROUGH THE EXIT IN A REVERSING PATH OF TRAVEL LONGITUDINAL OF SAID CHAMBER, A LONGITUDINALLY DISPOSED SUPPLY HEADER ALONG THE TOP OF SAID CHAMBER, AN AIR HEATER, A BLOWER, CONDUIT CONNECTIONS BETWEEN SAID HEATER AND THE BLOWER AND THE BLOWER AND SAID SUPPLY HEADER, A PLURALITY OF AIR DIFFUSERS HOUSED IN SAID SUPPLY HEADER AND SPACED LONGITUDINALLY THEREALONG AND EACH CONNECTED INTO SAID CENTRAL CHAMBER FOR DISTRIBUTING AIR SUPPLIED FROM SAID HEATER DOWNWARDLY THROUGH SAID CHAMBER NEAR ACROSS ARTICLES TRAVELING THERETHROUGH, A PLURALITY OF AIR EXHAUST DUCTS CONNECTED INTO SAID CENTRAL CHAMBER NEAR THE BOTTOM THEREOF AND EXTENDING VERTICALLY UPWARDLY ALONG THE SAID CHAMBER, A LONGITUDINALLY DISPOSED EXHAUST HEADER AND INTERIORLY DISPOSED IN THE OVEN STRUCTURE OVERLYING SAID SUPPLY HEADER, EACH OF THE SAID AIR EXHAUST DUCTS BEING CONNECTED INTO SAID EXHAUST HEADER, A CONDUIT CONNECTION BETWEEN SAID EXHAUST HEADER AND SAID AIR HEATER, AND ADJUSTABLE DAMPERS IN EACH OF SAID EXHAUST DUCTS FOR REGULATING THE FLOW OF AIR THERETHROUGH.