Dam construction for controlling tin currents in a float glass c

Details Dam construction for controlling tin currents in a float glass c Dam construction for controlling tin currents in a float glass c

1979-12-03

1981-07-21

Kellogg, Arthur D.

Glass manufacturing

With fluid support for article or preform

Means for treating or maintaining molten metal

65 99A, 651825, C03B 1818

Patent

active

042796342

ABSTRACT:
This specification is directed to a dam structure which may be used in a float glass chamber for separating a hot entry end of the chamber from a cold exit end of the chamber. The dam has been specially designed so that it will mix tin currents sheared from a glass ribbon moving thereover of higher temperature with colder tin moving around the edges of the dam and returning from downstream of the float chamber. The mixing of the tin currents occurs at a position spaced outwardly fromm the position of movement of the glass ribbon over the dam so that glass ribbon is not subjected to zones of tin having varying temperatures which could cause optical distortions therein.

REFERENCES:
patent: 3607199 (1971-09-01), Itakura et al.
patent: 3925051 (1975-12-01), Lawhon
patent: 4131446 (1978-12-01), Dickenson
patent: 4183239 (1979-02-01), Nier et al.

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