Method and apparatus for forming tempered sheet glass with a pyr

Details Method and apparatus for forming tempered sheet glass with a pyr Method and apparatus for forming tempered sheet glass with a pyr

1979-02-09

1980-12-23

Kellogg, Arthur D.

Glass manufacturing

Processes

With coating

65 60B, 65 60D, 65160, 65163, 65181, 65350, 4274194, 4274196, C03B 2700, C03C 1727

Patent

active

042408164

ABSTRACT:
A method and apparatus for filming and tempering a pre-cut glass sheet in a continuous process. The glass sheet is heated initially to a temperature sufficient for pyrolysis. The heated glass is sprayed with a coating composition which reacts with the glass to form a metal oxide film on its surface. The filmed glass is re-heated to both restore the heat lost by spraying and to bring its temperature to a level sufficient for tempering. The glass sheet is then tempered by subjecting it to rapid cooling. The method can be modified to include a secondary spraying wherein after the glass is first sprayed it is re-heated as in the initial step and then re-sprayed before completing the process. Apparatus for carrying out the above described method is also disclosed.

REFERENCES:
patent: 3762902 (1973-10-01), Wagner et al.
patent: 3880633 (1975-04-01), Jordan et al.
patent: 3996035 (1976-12-01), McHenry
patent: 4123244 (1978-10-01), LeClercq et al.

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