The present invention relates to a method capable of easily manufacturing a curved thin glass sheet and a curved joined glass sheet to which functionality is added.

A process for manufacturing a bent laminated glazing, includes manufacturing a first bent laminated glazing including at least two glass substrates locally comprising, in each of the at least two glass substrates and facing each other in all the at least two glass substrates, a zone including compressive stresses, and cutting the first bent laminated glazing through its entire thickness along a line included in the zone in order to form local cut edges and, after cutting, a second bent laminated glazing with the local cut edges having compressive edge stresses.

A system and process for forming a curved glass laminate article is provided. The process and system utilizes a separation material, such as solid lubricating material and/or a spray applied separation material that Applicant has determined reduces bending dot formation during co-sagging shaping of glass sheets. The bending dot reduction provided by the separation materials discussed herein is particularly seen when the pair of glass sheets have significantly different thicknesses and/or viscosities from each other.

Gyroscopes are sensors that measure angular rate and angular orientation. A three-dimensional fused silica micro shell rate-integrating gyroscope is presented. One aspect of the gyroscope includes the use of optical sensors to detect motion of the resonator. The proposed gyroscope is attractive because it achieves several magnitudes higher accuracy as well as high vibration and shock insensitivity from a novel resonator design as well as other unique manufacturing processes.

A glass for chemical strengthening has a Young's modulus E of 70 GPa or more. The glass satisfies X.sub.1+X.sub.2+X.sub.3 being 1760 or less. Here, X.sub.1 is a numerical value equivalent to a value [unit: kPa/° C.] obtained by multiplying the Young's modulus E by an average coefficient α of thermal expansion at 50° C. to 350° C., X.sub.2 is a numeral value equivalent to a value of a temperature Tf [unit: ° C.] at which a viscosity of the glass reaches 100 MPa.Math.s, and X.sub.3 is a numerical value equivalent to a value of a difference [unit: 10.sup.5 Pa.Math.s] between the viscosity (100 MPa.Math.s) at the Tf and a viscosity η.sub.+10 at a temperature 10° C. higher than the Tf.

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.

A method for shaping a coated glass sheet involves conveying the coated glass sheet through a furnace to heat the coated glass sheet to a temperature suitable for shaping. The coated glass sheet is then deposited on a first bending tool for supporting the coated glass sheet and is at a first position relative to the first bending tool. A first portion of the coated glass sheet is contacted to move the coated glass sheet to a second position relative to the first bending tool. The coated glass sheet is then shaped on the first bending tool. Other aspects include a method for adjusting the position of a hot coated glass sheet on a bending tool and a shaping line for shaping a coated glass sheet comprising a positioning device for contacting a first portion of a coated glass sheet on a bending tool to adjust the position thereof.

A sheet of glass can be formed in a batch process by introducing molten glass onto a layer of molten tin within a tank. The tank may be outfitted with infrared emitters to control the amount of heat delivered to the tank while the sheet of glass is formed. A lower surface of the tank can have a three-dimensional shape, and the molten tin may be removed from the tank while the sheet of glass is ductile so that the sheet of glass is molded by the three-dimensional shape, thereby producing a shaped sheet of glass. The delivery of infrared energy to the tank may be facilitated by one or more ceramic glass surface.

The present invention relates to a chemically strengthened glass ceramic including a crystalline phase, having two main surfaces opposed to each other, and including an amorphized region in a surface layer of at least one of the main surfaces and a crystallized region inside the glass, in which the amorphized region has a crystallinity of 10 vol % or less at a depth of 100 nm from an outermost surface of the glass.

A windshield according to the present invention includes an outer glass plate, an inner glass plate that faces the outer glass plate, and an intermediate film disposed between the outer glass plate and the inner glass plate, and in at least a partial region of the outer glass plate and the inner glass plate, compressive principal stress on a surface on a vehicle exterior side of the outer glass plate is larger than compressive principal stress on a surface on a vehicle interior side of the inner glass plate.