A tooling for forming a sheet of glass includes a forming die made of electrically conductive material and a heating unit, distant from the forming die. The forming die includes a molding surface, a support to hold a sheet of glass away from and opposite the molding surface, and an induction circuit having an inductor extending in a cavity in the forming die. The heating unit includes a surface configured to produce thermal radiation opposite the molding surface, and an induction circuit having an inductor extending in a cavity of the heating unit. A connector connects the induction circuits to a high-frequency current generator.

Glass sheet forming and annealing disclosed provides control of edge stresses by maintaining a press formed glass sheet on an annealing ring (72) below a heated upper forming mold (58) within a forming station (12) for slow cooling toward the glass strain point temperature.

The present invention is devised to solve the problems of the above-described conventional technologies. The purpose of the present invention is to provide a tempered glass cutting method and cutting apparatus which can prevent the defects of the tempered glass breaking when same is cut and improve the reliability of the product. To this end, provided is a tempered glass cutting method which comprises: a tempering step of generating compressive stress on a glass sheet to temper the glass sheet; a compressive stress relaxation step of applying heat to the cut portion of the tempered glass sheet to relax the compressive stress; and a cutting step of cutting the cut portion.

A method of forming a glass body, the method including pressing titania-doped silica soot to form a molded body, consolidating the molded body by heating the molded body, annealing the consolidated molded body, and polishing at least one surface of the annealed molded body to form the glass body. After the polishing, the at least one surface of the glass body has a waviness amplitude of about 0.60 nm or less in the spatial frequency range of 0.05 mm.sup.1 or more and 0.2 mm.sup.1 or less.

A method for producing ultra-thin glass sheets is provided that results in glass sheets with high edge strength. The method includes: hot forming a continuous glass ribbon with a glass thickness from molten glass; annealing the glass ribbon with an annealing rate chosen based on the glass thickness; producing a laser beam focus area that is longer than the glass thickness; introducing filamentary defects into the glass ribbon using the laser beam so that the filamentary defects extend from one face to the opposite face and are spaced apart from one another along the breaking lines to produce transverse breaking lines and longitudinal breaking lines with margins each comprising a thickened bead; separating the beads along the longitudinal breaking lines and separating glass sheets by severing along the transverse breaking lines.

Photosensitive lithium zinc aluminosilicate glasses that can be selectively irradiated and cerammed to provide patterned regions of glass and lithium-based glass ceramic, and composite glass articles made from such glasses and glass ceramics are provided. Compressive and tensile stress at the interface of the lithium-based glass-ceramic and lithium zinc aluminosilicate glass may be used to frustrate crack propagation in such a composite glass/glass ceramic article. Methods of making composite glass articles comprising such lithium-based glass ceramics and lithium zinc aluminosilicate glasses are also provided.

A method of manufacturing a glass sheet laminate to be formed by integrally laminating two glass sheets includes: laminating the two glass sheets by bringing surfaces thereof in a vicinity of an outer peripheral portion into surface contact with each other; performing laser fusing so as to cut and remove a part of a surface contact portion under a state in which the surface contact portion has a surface roughness of 2.0 nm or less; and processing a fusing end surface of the surface contact portion into a curved surface and sealing the fusing end surface with heat generated when the laser fusing is performed.

An article includes a glass substrate and an insert within the glass substrate, the surface roughness (Ra) of the glass substrate and the insert is about 0.05 m to about 0.2 m.

A method for producing ultra-thin glass sheets is provided that results in glass sheets with high edge strength. The method includes: hot forming a continuous glass ribbon with a glass thickness from molten glass; annealing the glass ribbon with an annealing rate chosen based on the glass thickness; producing a laser beam focus area that is longer than the glass thickness; introducing filamentary defects into the glass ribbon using the laser beam so that the filamentary defects extend from one face to the opposite face and are spaced apart from one another along the breaking lines to produce transverse breaking lines and longitudinal breaking lines with margins each comprising a thickened bead; separating the beads along the longitudinal breaking lines and separating glass sheets by severing along the transverse breaking lines.

A method for fabricating self-healing glass includes processing a water-based or water-containing oxide material for fabrication of self-healing glass. The method includes performing a thermal annealing process on the material, and manufacturing the self-healing glass from the thermal annealed material.