Glass manufacturing – Processes – Utilizing parting or lubricating layer
Patent
1982-06-17
1984-02-21
Kellogg, Arthur D.
Glass manufacturing
Processes
Utilizing parting or lubricating layer
65 254, 65104, 65106, 651822, 65273, 65286, C03B 23035
Patent
active
044327820
ABSTRACT:
A flat glass sheet of a given outline configuration is supported in a shaping station by a combination of a gas hearth bed portion and readily replaceable flat plate means comprising spaced plates having spaced edges of conforming shape that define an elongated slot conforming to the outline shape of at least a portion of the periphery of the flat glass sheet. The gas support bed portion provides hot gas under pressure to float the flat glass, and the flat plate means is located in close proximity to an end of the gas hearth bed portion to provide a narrow space at the level of the gas hearth bed portion for escaping gas between the flat plate means and the extending glass sheet portion to limit sag of the extending glass sheet portion. The flat plate means may be covered by material that does not mar hot glass, such as boron nitride, in case the glass sheet portion sags a limited distance to slide in contact with the flat plate means before it is lifted on a shaped, ring-like member.
REFERENCES:
patent: 3468645 (1969-09-01), McMaster et al.
patent: 3682613 (1972-08-01), Johnson et al.
patent: 3846104 (1974-11-01), Seymour
patent: 3869271 (1975-03-01), Shaffer et al.
patent: 4204853 (1980-05-01), Seymour
patent: 4229200 (1980-10-01), Seymour
Kellogg Arthur D.
Mates Edward I.
PPG Industries Inc.
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