Glass manufacturing – Processes – Forming and fire polishing or product
Patent
1974-10-15
1976-01-06
Kellogg, Arthur D.
Glass manufacturing
Processes
Forming and fire polishing or product
65 99A, 65182R, C03B 1802
Patent
active
039308294
ABSTRACT:
Movable lateral and longitudinal dam barriers are provided in a glass forming chamber of the type containing a molten metal. The movable lateral dam barriers control longitudinal convection currents in the molten metal to control the temperature of the glass as it moves through the forming chamber. The lateral dam barriers can be moved to change longitudinal convection currents to achieve the optimum temperature conditions in the glass ribbon for producing flat glass of a specific thickness at any desired ribbon speed. The lateral dam barrier can also be moved to change convection currents and glass ribbon temperature to facilitate the change over from producing a glass ribbon of one thickness to a glass ribbon of a different thickness. The movable longitudinal dam barriers control lateral convection currents in the molten metal to flatten the edge-to-edge temperature profile across the ribbon of a glass ribbon moving through the chamber supported on the molten metal.
REFERENCES:
patent: 3317302 (1967-05-01), Misson
patent: 3420647 (1969-01-01), Charnock
patent: 3485617 (1969-12-01), Lawrenson
patent: 3539320 (1970-11-01), Plumat et al.
patent: 3843345 (1974-10-01), Harrel et al.
Kellogg Arthur D.
Lepiane Donald Carl
PPG Industries Inc.
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