Method and apparatus for manufacture of glass film

Details Method and apparatus for manufacture of glass film Method and apparatus for manufacture of glass film

1979-12-03

1981-05-19

Kellogg, Arthur D.

Glass manufacturing

Processes

Forming product or preform from molten glass

65203, 65327, 65DIG4, 65DIG5, 13 6, C03B 502, C03B 1706

Patent

active

042682967

ABSTRACT:
The invention provides a method and apparatus for the manufacture of glass film having a thickness not in excess of 0.003 inches and accomplished by drawing the film through a narrow slot-like orifice. The walls of the orifice are defined by an electrically conductive, hot glass resistant metal and electrical currents are introduced into the metal walls of the orifice to effectively maintain the central portions of the orifice walls at a higher temperature than each of the two lateral end walls of the orifice, thereby producing a temperature differential in the drawn film on the order of 40.degree. F. between the edges of the film and the central portions of the film.

REFERENCES:
patent: 1853842 (1932-04-01), Bates et al.
patent: 2111860 (1938-03-01), Kilian
patent: 3078695 (1963-02-01), Kozak et al.
patent: 3186813 (1965-06-01), Pfaender
patent: 3682609 (1972-08-01), Dockerty

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