Method of toughening glass sheets

Details Method of toughening glass sheets Method of toughening glass sheets

1978-06-19

1979-12-11

Kellogg, Arthur D.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

Surface modified glass

65114, 65104, C03B 2700

Patent

active

041784146

ABSTRACT:
A method of thermally toughening a glass sheet in which the glass sheet is advanced into a flow of quenching gas directed towards at least one surface of the sheet to induce overall toughening stress in the glass sheet. The advance of the sheet relative to the quenching gas flow is terminated, either by halting the sheet in the flow or by moving the outlets providing the flow with the sheet, so that at least one surface of the sheet is subjected to localized gas flows. The toughened glass sheet so produced has a distribution of regions of more highly toughened glass interspersed with regions of lesser toughened glass.

REFERENCES:
patent: 1960222 (1934-05-01), Long
patent: 2078541 (1937-04-01), Monnier
patent: 2244715 (1941-06-01), Long
patent: 3873295 (1975-03-01), Bates et al.
patent: 4128690 (1978-12-01), Boardman et al.

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