Heating – Processes of heating or heater operation – Continous strip – strand or web passed longitudinally through...
Patent
1976-07-19
1977-12-27
Camby, John J.
Heating
Processes of heating or heater operation
Continous strip, strand or web passed longitudinally through...
432128, 432145, 34233, 266261, F27B 900
Patent
active
040652491
ABSTRACT:
An apparatus for heating materials such as aluminum billets to a temperature suitable for extrusion is disclosed. The apparatus has at least two zones arranged in tandem, a preheat zone and one or more primary heating zones. Every zone has inner and outer chambers. The outer chamber is supplied with high temperature gas at a pressure in excess of that of the inner chamber. The chambers are separated by baffles which define narrow slot-like aspirating throats through which secondary gases from a secondary source are jetted after entraining high temperature gases from the primary chamber. The secondary gases are at a lower temperature to provide efficient impingement of the gases on a target such as a billet with the primary gases providing the principle heat source. The apparatus is of the closed type utilizing rapid recycling of gases for efficient use of thermal energy.
REFERENCES:
patent: 2663951 (1953-12-01), Kennison
patent: 3172647 (1965-03-01), Remmey
patent: 3837794 (1974-09-01), Phillips
patent: 3905764 (1975-09-01), Birke et al.
Camby John J.
Oliver Machinery Company
Yuen Henry C.
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