Jet fired zonal lehr for applying treating medium inside and out

Details Jet fired zonal lehr for applying treating medium inside and out Jet fired zonal lehr for applying treating medium inside and out

1976-07-09

1978-01-31

Kellogg, Arthur D.

Glass manufacturing

Processes

Glass preform treating

65350, 65351, 432 48, C03B 2504

Patent

active

RE0295280

ABSTRACT:
This disclosure relates to a method and apparatus for annealing glassware by passing the ware continuously through a tunnel in which the application of heat and recirculation of the gaseous treating medium is regulated to establish and maintain independently controllable heating and cooling zones. An endless perforated conveyor passes from end to end of the tunnel and the ware is placed on the conveyor in alignment with and beneath a jet-like blast of the treating medium internally and externally of the ware simultaneously to subject all of the ware to uniform treatment in minimum time. The treating medium in the heating zones of the tunnel is recirculated and furnace pressure and temperature is regulated by circulating fans and by dampers between the furnace chambers with the outside atmosphere.

REFERENCES:
patent: 1745362 (1930-02-01), Evans
patent: 2244772 (1941-06-01), Geer
patent: 2982052 (1961-05-01), Lawson
patent: 3303918 (1967-02-01), Larson
patent: 3387962 (1968-06-01), Whitmire
patent: 3463465 (1969-08-01), Fuller

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