Glass manufacturing – Processes – Glass preform treating
Patent
1974-10-15
1976-02-17
Kellogg, Arthur D.
Glass manufacturing
Processes
Glass preform treating
65 40, 65349, 65351, C03B 2700
Patent
active
039389804
ABSTRACT:
This invention relates to a method and apparatus for forming tempered glass articles, the particularly shaped glass articles. The method includes the step of subjecting the glass article to be tempered to a homogeneous heating source while simultaneously quenching surfaces of said article being heated, whereby there is achieved within said article a differential temperature condition sufficient to effect full tempering thereof. Since the surfaces of said article are quenched as the article is being heated, at least the surface portions of the article are retained at a temperature sufficiently low to provide mechanical support for the article, whereby sagging or deformation of the article under gravitational or other influences is prevented, without the necessity for providing form-fitting molds or like appurtenances physically to prevent distortion of the glass article during tempering.
The invention further relates to an apparatus for practicing the noted method.
REFERENCES:
patent: 2068799 (1937-01-01), Guyer
patent: 3293022 (1966-12-01), Beattie
patent: 3406022 (1968-10-01), Gehenot
Basseches Mark T.
Basseches Paula T.
Kellogg Arthur D.
The Seagrave Corporation
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