Method and apparatus for heating glass sheets in preparation...

Details Method and apparatus for heating glass sheets in preparation... Method and apparatus for heating glass sheets in preparation...

2006-10-31

2006-10-31

Vincent, Sean (Department: 1731)

Glass manufacturing

Processes

Glass preform treating

C065S119000, C065S349000

Reexamination Certificate

active

07127918

ABSTRACT:
A method and apparatus for heating glass sheets in preparation of tempering. A furnace (1) is provided with upper and lower convection blasting conduits (11, 14) extending lengthwise of the furnace. The furnace is also provided with upper and lower radiation heating elements (12, 16). The convection heating air is pressurized with a compressor (3), cleaned with a filter (4). The upper convection heating air is heated with air discharged from the furnace in a plurality of separate heat exchangers (7), through which the convection heating air is passed into the upper convection blasting conduits (11). The amount of air discharged from the furnace (1) through the heat exchangers (7) is substantially equal to that blasted into the furnace for convection heating.

REFERENCES:
patent: 4390359 (1983-06-01), Reunamaki
patent: 5057138 (1991-10-01), Vehmas et al.
patent: 5938810 (1999-08-01), De Vries et al.
patent: 5951734 (1999-09-01), Friedel et al.
patent: 6845633 (2005-01-01), Vitkala
patent: 6901773 (2005-06-01), Thomas et al.
patent: 2002/0134109 (2002-09-01), Vitkala
patent: 83072 (1991-02-01), None
patent: 98/01398 (1998-01-01), None

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