Forming a falling curtain of molten glass

Details Forming a falling curtain of molten glass Forming a falling curtain of molten glass

1977-08-29

1978-06-13

Kellogg, Arthur D.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 5, 65 16, 65 21, 65 83, 65 99A, C03B 3706, C03B 1700

Patent

active

040946584

ABSTRACT:
A free-falling curtain of molten glass that is uniform in thickness and temperature is formed by flowing the glass over the lip of a forehearth after conditioning the glass in said forehearth. The forehearth is constructed to provide an increasing rate of fall as the glass travels, flows from the furnace through the forehearth and progressively cools. The floor of the forehearth is essentially the mirror image of the viscosity versus temperature curve of the material being treated.
Other molten materials that become viscous as they cool can also be treated by the method of my invention to provide a uniform falling curtain of said material.

REFERENCES:
patent: 3794475 (1974-02-01), Lazet et al.
patent: 3834975 (1974-09-01), Brichard
patent: 3840359 (1974-10-01), Lazet
patent: 4015964 (1977-04-01), Levecque et al.

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