Heat treatment furnace for glass

Details Heat treatment furnace for glass Heat treatment furnace for glass

1986-04-11

1987-05-12

Kellogg, Arthur

Glass manufacturing

With fluid support for article or preform

Gaseous support

65103, 65107, 65349, 6537413, C03B 2900

Patent

active

046646922

ABSTRACT:
A gas hearth furnace for heat treatment of a plate glass consists of a plurality of aligned hearth beds on which a plate glass moves to be subjected to heat treatment. Four support pillars are provided for supporting each hearth bed through a pair of support blocks disposed along the opposite sides of the lower surface of the hearth bed. Each support pillar and each support block are made of a refractory having a coefficient of thermal expansion not higher than 10.sup.-7 /.degree. C., thereby rendering negligible the fluctuation of vertical location of the hearth beds due to thermal expansion of a support structure including the support pillar and block.

REFERENCES:
patent: 3223501 (1965-12-01), Fredley et al.
patent: 3332759 (1967-07-01), McMaster et al.
patent: 3375093 (1968-03-01), Reising
patent: 4059427 (1977-11-01), Starr et al.

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