Abstract: The subject of the invention is a glass composition of the silica-soda-lime type, having a UV transmission such that T.sub.UV.ISO <15%, and preferably T.sub.UV.ISO .ltoreq.13%, for a glass thickness of between 2.85 mm and 4.

Abstract: A method and apparatus for extruding a plastic spacer directly on an object, in particular on the periphery of window glazing, such as automobile glazing intended to be glued into the opening of a vehicle. In particular the invention relates to properly producing the connection zone between the end and the beginning of the extruded spacer when it forms a closed loop. According to the invention the beginning of the spacer and the remainder of the loop are extruded, with the exception of the connection zone. The object is then provided with an applied anti-adhesive deposit surface that is continuous with the surface of the object. The path of the extrusion head is diverted in relation to the surface of the object so that the extrusion occurs on the applied deposit surface, proximate to and beyond the beginning of the spacer loop. The extruded spacer is then allowed to harden and the extremities of the spacer are cut and adjusted to properly complete the connection.

Abstract: The invention relates to a coated glass substrate, covered with at least one thin layer based on silicon nitride or silicon oxynitride. The thin layer contains the elements Si, O, N, C in the following atomic percentages:Si: from 30 to 60%,N: from 10 to 56%,O: from 1 to 40%,C: from 1 to 40%.The invention also relates to the process for obtaining the coated glass substrate using a gas-phase pyrolysis technique, and to its applications.

Abstract: The invention relates to a process for treating glass substrates, in particular those used as memories for "peripherals" in the field of data processing.According to the invention, the process includes a surface ion-exchange strengthening step and a subsequent substrate surface dealkalization step.

Abstract: A process and a device for duplicate molding on at least one part of a glazing, placed in a mold, particularly a monolithic or laminated glazing, of glass and/or of transparent plastic, by injection of plastic has at least two stations: a main station for the pressurization of a first mold, the injection of a plastic and the release of the molding pressure of the mold. Additional operations are being performed on a second mold at an auxiliary station. Transfers of the molds from the auxiliary station to the main station and vice versa are provided.

Abstract: The present invention relates to a process for the manufacture of glass sheets, according to which molten glass is poured into a liquid support which is denser than the glass to form a glass strip. The glass strip is drawn and is accompanied in its movement using a continuous and flexible guiding element made of a solid material capable of adhering to the molten glass, the elements being brought into contact with the side edges of the strip. The product (P) of the value (s) of the speed of the strip and of the value (t) of its final thickness is less than 2.5.times.10.sup.-4 m.sup.2 s.sup.-1. The process makes it possible to obtain thin glass sheets exhibiting a constant thickness and a satisfactory optical quality.

Abstract: Glass sheets are bent in stages into the final shape in a horizontal position in two successive bending stations. The glass sheets heated to bending temperature are laid on a fabric carrier arranged resiliently on a rigid support frame. The glass sheets are conveyed stepwise with the fabric carrier and the support frame through the bending system, and are bent together with the fabric carrier which adapts to the shape of the glass sheets.

Abstract: The invention relates to a soundproofing window in which an intermediate film provides for damping of vibrations transmitted in particular by structure-borne conduction.

Abstract: The invention pertains to a separation device which is to be temporarily inserted between two sheet products, in particular between two plates of glass, and which has differentiated adhesion with these two sheet products. The separation device is essentially made of a thermofusible material which has an ability to absorb shocks and an ability to obtain for one of its two sides, a controlled and desirable adhesion with the sheets to be separated.

Abstract: The invention relates to a glazing pane having an "A" antireflection coating on at least one of its external faces, which antireflection coating comprises a stack of layers of materials having alternately high and low refractive indices. At least some of the layers of the said stack are pyrolysed layers, especially the final layer.

Abstract: A kit for the installation of a window in a sash (26) IS in the form of a casing having the same surface area as the window and which is installed in sliding manner in a lateral bay window of an airplane cockpit. The kit includes a laminated sheet of glass (10) having at least two sheets of structural glass (12, 14) which are connected to one another by an intermediate layer (16) made of transparent plastic, a joint (22) made of elastomer which is used to cover the side and edge of the sheets of structural glass, and a retaining section (34) in the shape of a casing having the same surface area as the sash. The section is provided with a first wing which is to be bolted to the sash and a second wing capable of securing a peripheral edge of the sheets of structural glass against the sash, and at least one series of bolts (46, 48) used to secure the retaining section on the sash.

Abstract: The invention relates to a glass composition intended for the manufacture of thermally stable substrates or panes, which comprises the following constituents in the following proportions by weight:______________________________________ SiO.sub.2 55-70% Al.sub.2 O.sub.3 0-5% or 5-10% ZrO.sub.2 5-10% or 0-5% B.sub.2 O.sub.3 0-3% Na.sub.2 O 2-6% K.sub.2 O 5-11% MgO 0-6% CaO 2-11% SrO 4-12% BaO 0-2% ______________________________________with the following relationships:Na.sub.2 O+K.sub.2 O.gtoreq.8%MgO+CaO+SrO+BaO>10%the said composition having a strain point which is in excess of 600.degree. C.

Abstract: A door or wall of an environmental chamber and in particular a glazed door or wall includes an insulating panel. The insulating panel includes at least two glass substrates between which a vacuum has been created. The at least two glass substrates being separated from each other by mounts distributed over the entire surface of the at least two glass substrates. The at least two glass substrates joined together around their periphery by an inorganic seal.

Abstract: The present invention relates to a process for preparing a sheet of plastic coated with a hard varnish on at least part of at least one of its sides, including:1) preparing a sheet of plastic by injection molding,2) applying the varnish to the said sheet, and3) heating the combination at a temperature at least equal to the softening point of the plastic of which the sheet is made, the varnish of at least a central part of the said combination being free of any mechanical contact other than that with the said sheet; the flat or curved transparent sheet thus obtained; its application as a motor-vehicle component containing a transparent part forming glazing and as motor-vehicle glazing.

Abstract: A glazing is described, which includes at least one active layer and at least one reflecting coating on the active layer. A pane, partition, mirror, or door is also described that includes the glazing. A method for making is also described. The glazing exhibits superior thermal and radiative durability, and is capable of modulating the optical appearance of the active layer.

Abstract: An insulating glazed element composed of at least two glass sheets separated from each other by a small space in which a vacuum has been created is provided with a heating element on an internal face of at least one of the glass sheets. Two current supply collecting lines are positioned on at least part of the internal face of the at least one of said glass sheets. The heating element includes at least one conductive layer deposited on at least part of the internal face of the at least one of the glass sheets. The conductive layer extends between the two current supply collecting lines.

Abstract: A method and apparatus involving combustion for melting glass. The fuel and oxidizer of the combustion are both supplied in such a way as to spread out the fuel/oxidant contact over time and to increase the volume of the contact. This limits the temperature peaks and reduces No.sub.x emissions. The invention also relates to the glass furnace which implements the method.

Abstract: A glazing assembly is provided made of at least one transparent substrate having a stack thereon that includes an alternation of n functional layers and n+1 coatings, wherein the functional layers have reflection properties in the infrared and/or solar radiation and wherein n.gtoreq.1 and where, in order to maintain the quality of the stack when the substrate is subjected to a heat treatment step, at least one of the following must be satisfied:the coating placed on top of at least one of the functional layers includes at least one barrier layer providing a barrier to at least oxygen and water; andat least one absorbent or stabilizing layer made of a material capable of absorbing or stabilizing the constituent material of the functional layer forms a part of either the coating placed on top of the functional layer and under the barrier layer or the coating placed beneath the functional layer; and a method for production of the glazing assembly.

Abstract: A method for bending a sheet of glass heated to a bending temperature in a horizontal furnace through which it is conveyed by a plane conveyor delivering the glass sheet to a bending cell heated to substantially the same temperature as the bending temperature. A concave annular recessed portion provides gravity preshaping and then moves the glass sheet vertically towards a solid convex projecting portion within the cell, so that the sheet is squeezed between the concave and convex portions. A device for carrying out the method and its use for producing glazing with a particularly complex shape are are disclosed.

Abstract: A substrate having the following layers in the following order thereon; first dielectric layer, first layer with infrared reflection properties, second dielectric layer, second layer having infrared reflection properties, and third dielectric layer. The thickness of the first layer with infrared reflection properties is 50% to 64% of that of the second layer having infrared reaction properties. The optical thickness of the first dielectric layer is greater than the thickness of the third dielectric layer by at least 100%. The substrate and the layers together exhibit an external reflection color in the range of blue to blue-green at both 0.degree. and 60.degree. incidence angles.