Glass manufacturing – Processes – Glass preform treating
Patent
1987-04-15
1988-04-19
Kellogg, Arthur
Glass manufacturing
Processes
Glass preform treating
65104, 65107, 65273, 65350, 431158, 431173, C03B 2904
Patent
active
047387050
ABSTRACT:
A furnace (12) including a roller conveyor (18) and gas burners (20) distinct from the conveyor for supplying forced convection that is the dominant mode of heat transfer to glass sheets during a heating process. The gas burners (20) have general utility but have particular utility when utilized in a closely spaced relationship to the roller conveyed glass sheet to provide the forced convection heating. Each burner (20) includes a combustion member (38) defining an elongated combustion chamber (42) extending transversely to the direction of conveyance. Gas and air are introduced into the combustion chamber (42) in a tangential relationship with respect to its inner surface to provide a swirling motion that mixes the gas with the air for combustion prior to discharge through outlets (46) to provide the forced convection heating. A glass sheet heated by this gas burner forced convection on the roller conveyor and subsequently cooled has reduced roll-wave distortion and reduced edge distortion as compared to radiantly heated glass sheets.
REFERENCES:
patent: 3223498 (1965-12-01), Davidson, Jr.
patent: 3463601 (1969-08-01), Childree
patent: 4120640 (1978-10-01), Martin
patent: 4144045 (1979-03-01), Starr
Glasstech, Inc.
Kellogg Arthur
LandOfFree
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