Method of heat treating moving glass sheets on modified gas bed

Details Method of heat treating moving glass sheets on modified gas bed Method of heat treating moving glass sheets on modified gas bed

1978-09-25

1980-05-27

Kellogg, Arthur D.

Glass manufacturing

Processes

Utilizing parting or lubricating layer

65114, C03B 2700

Patent

active

042048451

ABSTRACT:
This invention relates to the tempering of glass sheets, and particularly concerns cooling heat-softened glass sheets sufficiently rapidly to induce a stress pattern through the thickness of the glass of sufficient magnitude to temper the glass sheets with minimum surface deformation in a process where flat glass sheets are conveyed while supported on a modified gaseous bed that comprises an upstream portion having opposed modules with thin slotted openings that provide thin, discrete, laminar streams of tempering medium against the opposite major surfaces of said glass sheets and a downstream portion having opposed modules that provide a smoother support bed than said discrete streams through a more diffuse pattern of tempering medium.

REFERENCES:
patent: 3223500 (1965-12-01), Misson
patent: 3300290 (1967-01-01), Misson
patent: 3395943 (1968-08-01), Wilde
patent: 3607198 (1971-09-01), Meunier
patent: 3672861 (1972-06-01), Ritter, Jr. et al.
patent: 4046543 (1977-09-01), Shields

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