Heating – Having fluid curtain at chamber port or work path
Patent
1980-03-21
1981-11-03
Camby, John J.
Heating
Having fluid curtain at chamber port or work path
98 36, F24F 900, F27D 700
Patent
active
042983410
ABSTRACT:
An industrial oven in which articles to be heat treated are carried by a conveyor through a heated tunnel space in a tunnel structure which has end walls with access openings, such oven comprising a nozzle directed downwardly into the tunnel space at an inclined angle across at least one access opening, an exhaust opening communicating with the tunnel space in the vicinity of the upper portion of such access opening, and air handling means for withdrawing hot air from the tunnel space through said exhaust opening while blowing hot air into the tunnel space through said nozzle for minimizing the escape of hot air through such access opening. The air handling means may take the form of a recirculating blower connected between the exhaust opening and the nozzle. The oven may have an air heating and recirculating system which withdraws air from the tunnel space. Instead of providing a separate recirculating blower, exhaust and supply ducts may be connected to the intake and discharge sides of such system and may extend to the exhaust opening and the nozzle to circulate hot air out of the tunnel space through the exhaust opening and into the tunnel space through the nozzle.
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