Glazing pane and method for its production
AssigneeSaint-Gobain Vitrage International
InventorsFranz Kramling, Herve Charrue, Frederic Weber, Bernard Letemps, Claude Didelot
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Abstract
A method for the preparation of glass sheets with a view to laminating them consists of curving the glass sheets by causing them to pass one after another along a curved trajectory, then cooling them by passage between blowing chests, and of dispatching them by batches to the assembling station, and a laminated pane, the sheets of which have, in the central zone, a core compressive stress of from 1 to 50 MPa.
Claims11
A glazing pane comprising a glass sheet having a thickness of from 1.5 to 4 mm, the sheet of glass having undergone a thermal hardening treatment and having a central region in which a surface compressive stress is from 40 to 100 MPa, a marginal region having an edge stress of from 50 to 100 MPa and an intermediate region which is disposed between the central region and the marginal region, said intermediate region having an anisotropic thickness stress which, when averaged throughout the thickness of the glass sheet, corresponds to a tensile stress of less than 10 MPa.
Dependencies are inferred from the claim text.