METHOD AND APPARATUS FOR THERMALLY TOUGHENING A GLASS SHEET

摘要

A method and apparatus for thermally toughening a glass sheet and a glass sheet toughened by the method, including heating the sheet (1) to a temperature near to its softening point and then lowering the sheet into a gas-fluidised bed (5) of particulate material.
A void region (11) is established beneath the lower edge of the sheet (1) as it is initially immersed in the fluidised bed (5).