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US 4,801,321 AGranted
Method for the manufacturing of glass sheets
AssigneeVidrio Plano, S.A.
InventorsAntonio Pita, Guillermo Carro-de-la-Fuente, Saul-Roman Ruiz-Ontiveros
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Abstract
A method of manufacturing glass sheets from molten glass contained in a vertical drawing chamber includes the step of placing a stratified liquid layer on the mass of molten glass, the stratified liquid layer comprising at least two phases of densities different to each other, and vertically drawing a glass sheet from the glass mass through the stratified liquid layer.
Claims5
A method of manufacturing glass sheets from a molten glass mass contained in a drawing chamber, including the steps of:
- controlling the temperature and viscosity of said molten glass mass for it to be substantially homogenous;
- placing a stratified liquid layer on said molten glass mass contained within said drawing chamber, said stratified liquid layer being substantially immiscible with said molten glass mass and comprising at least two phases of densities different to each other;
- and,
- vertically drawing a glass sheet through said stratified liquid layer from said molten glass mass;
- whereby, said stratified liquid layer dampens convective currents occurring both in said stratified liquid layer and in said molten glass mass, and applies a uniform hydrostatic pressure to said molten glass mass and to the glass sheet during the drawing thereof in order to promote uniform distribution of thickness throughout the drawn glass sheet and diminish causes of distortion in the drawn glass sheet.
2 more elements
Dependencies are inferred from the claim text.