Method of manufacturing tube glass

Details Method of manufacturing tube glass Method of manufacturing tube glass

1992-02-19

1993-05-25

Woodard, Joye L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 31, 65 601, 65 86, 65126, 65DIG4, 427237, C03B 1514

Patent

active

052135993

ABSTRACT:
In the manufacture of tube glass, in which following the drawing of a tube from molten glass the inside surface of the tube is treated with a chemically reactive gas or gas mixture, a gas or gas mixture which is not reactive at the drawing temperature of the glass is dispensed into the tube in the direction of drawing. At a location in the tube where the tube has cooled down so far that the diameter is constant, the gas or gas mixture is made to react by means of a plasma which is generated in the tube.

REFERENCES:
patent: 3870497 (1975-03-01), Spiessens
patent: 4175941 (1979-11-01), Lagos et al.
patent: 4493721 (1985-01-01), Auwerda et al.
patent: 4717607 (1988-01-01), Pfizenmaier et al.
Philips Tech. Review No. 44, pp. 241-249 May 1989 "Manufacturing Optical Fibres by the PCVD Process" Geittenr et al.

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