Equipment and method for manufacturing thin glass flakes

Details Equipment and method for manufacturing thin glass flakes Equipment and method for manufacturing thin glass flakes

1983-06-06

1985-07-02

Lindsay, Robert

Glass manufacturing

Processes

Forming product or preform from molten glass

65 88, 65 89, 65190, 65192, 65296, 65300, C03B 903

Patent

active

045266026

ABSTRACT:
A blow-pipe 1 with an upper end 2 shaped to retain a working amount of molten glass is vertically movable from beneath the surface of molten glass 9 in a furnace to an upper position within orifice 10a of cover plate 10 and just below a cylindrical guide tube 11. Upward movement brings the blow-pipe generally into a hotter environment, expands the internal air and thus provides an initial bubble at the blow-pipe end. This is progressively expanded into the guide tube, preferably by two-stage air supply at different pressures, to produce a constrained glass bubble, of a few microns thickness.

REFERENCES:
patent: 2711055 (1955-06-01), Majkrzak et al.
patent: 3342248 (1967-09-01), Bonis et al.
patent: 3729301 (1973-04-01), Heaton et al.
patent: 3734704 (1973-05-01), Fike
patent: 4066428 (1978-01-01), Gunthner

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