Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1985-02-19
1988-01-12
Spruill, Robert L.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
432202, 34 68, 34218, A21B 100
Patent
active
047193336
ABSTRACT:
An electrically heated kiln (10) for firing ceramic ware has centrifugal fans (22) communicating with a lower region of the kiln, the fans (22) pulling atmospheric air from externally of the kiln through electric heaters (24) so that heated air is introduced into the kiln to create an air flow which passes around the ware. The air then escapes through dampers (14) at an upper region of the kiln (10). In this way the electric heating elements (16) of the kiln (10) do not require to heat the ware up to such a high temperature as is conventional in order to burn off organic binders under which transfers for the ware are printed and the contaminated air can escape through the dampers (14) to effect a regular complete change of the air within the kiln (10). Alternatively where undecorated ware is to be fired the air within the kiln (10) does not become contaminated and can be recirculated to be introduced by the fans (22) at the lower region of the kiln (10). The efficiency of the kiln is therefore improved while still retaining the advantages of electrical heating.
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Adams, III W. Thad
Portmeirion Potteries Limited
Spruill Robert L.
Weihrouch Steven P.
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