Saint-Gobain Vitrage International

Saint-Gobain Vitrage

Saint-Gobain Glass France

Saint-Gobain Recherche

Jean-Marc Petitcollin

Jean-Luc Lesage

Arnaud Borderiou

Jean-Pierre Douche

Denis Mathivat

Bernard Letemps

Daniel Philibert

Francis Perin

Jean Lissillour, Deceased

Marc Watin

Luc Vanaschen

Gilles Garnier

Jacques Chaumette

Dany-Ange Plebani

Herve Prouveur

Philippe Girard

Heinz-Bernd Rissmann

Claude Aubry

Werner Gatzweiler

Thierry Franco

Pascal Tinelli

Jurgen Zeitzen

Gerard-Jean Harle

Andre Taworski

Pierre Marchal

A device for cooling bent glass sheets running along a roller conveyor. Blowing boxes are inserted between the rollers and have a surface opposite the glass sheet at a distance of less than 30 mm and preferably less than 10 mm. The surface is perforated with several holes through which air is discharged in the direction of the glass sheets.

Device for cooling convex glass sheets

A furnace for heating glass sheets moving along the axis of the furnace has at least one differentiated heating cell, the heating elements of which disposed at the vault side are constituted of sets of electrical resistors controlled in temperature or in power independently for each set. A portion of the electrical resistors are mounted parallel to the axis of the furnace, the other heating cells each constituting a longitudinal heating zone independent of the other longitudinal zones and having, at the vault side, heating elements composed of sets of electrical resistors subdivided into several independent transverse sub-zones, in which the electrical resistors are mounted perpendicularly to the axis of the furnace. The invention is applicable to the manufacture of curved and toughened panes.

Method for heating moving glass sheets

In a process and to an apparatus for bending a glass sheet heated to the bending temperature in a horizontal furnace, through which it is passed by a motor roller conveyor, which passes it into a bending cell where it is kept at an ambient temperature substantially identical to the bending temperature, the glass sheet is immobilized in the bending cell in an upper bending mold perpendicular to an annular countermold surrounding an element for supporting the central part of the glass sheet in the bending cell. The annular countermold is raised in order to press the glass sheet against the upper bending mold.

Process and apparatus for bending a glass sheet

A device for supporting and transferring, in a shaping station (2), at least the central part of glass sheets which have been heated to their shaping temperature. The device includes a pressurized box (21) generating an air cushion. The box has a plurality of individual compartments (53), transverse with respect to the axis of travel of the glass sheets (28), each of the compartments (53) having a width measured parallel to said axis which is small by comparison with the 'height' of the glass sheets and, being provided with gas having at least two pressure distribution levels.

Process and device for supporting and transferring glass sheets in a

A process for bending a glass sheet according to which the glass sheet is heated in horizontal position until its bending temperature is reached and is brought into contact with an upper bending form by a force of a pneumatic nature. A fluid barrier is generated at the periphery of the glass sheet, the fluid barrier limiting the entry and exit of air near the upper bending form.

Process for bending glass sheets using fluid barrier

A device for bending glass sheets which includes a furnace for heating the glass, a conveyor, a bending station within which there is suspended, notably from a plate, an upper bending mold at least partly disposed inside the skirt of a peripheral suction box, and the lower face of which is covered with a covering in such a way that this covering is supported by an attachment device which can be removed and is not integral with the upper mold.

Device for bending glass sheets on bending mold having a cover

Device for bending glass sheets using fluid barrier

Plastic sheets of good optical quality suitable for use in the glazings of automotive vehicles, eye glasses etc., are made by depositing a hardenable liquid mass upon a taut moving ribbon of plastic which has been pretreated by tensioning and heating to remove wrinkles and creases which otherwise would render optically unsatisfactory the sheet formed on the ribbon upon hardening of the liquid mass. The temperature range within which the pretreatment should be conducted is 60.degree.-100.degree. C., with 70.degree.-90.degree. C. being preferred; the tension applied in the pretreatment should be a dekanewton or more per square millimeter, preferably 1.5-7.5 dekanewtons per mm.sup.2 ; and the time of pretreatment is at least a minute and preferably 5 or more minutes. The lateral tension is preferably applied by means of pairs of opposed idler rollers positioned along the opposite side edges of the moving ribbon and biased toward each other to pinch the ribbon between them, with their axes angled outwardly by a few degrees from a direction normal to the direction of travel of the ribbon. The pretreatment heating is preferably applied in two successive ovens providing successive temperatures of about 70.degree. and 90.degree. C., respectively.

Method for the manufacture of plastic sheets of good optical quality

A glass sheet is transferred from a bending cell to a tempering cell on a continuous frame, after which it is held during tempering by discontinuous gripping device. Lifting studs lift the glass sheet above the frame prior to gripping.

Apparatus for tempering glass sheets

Process for bending and tempering glass sheets with lifting and gripping

Process for bending glass sheets with limiting air flow by utilizing gas

A furnace for heating glass sheets moving along the axis of the furnace has at least one differentiated heating cell, the heating elements of which disposed at the vault side are constituted of sets of electrical resistors controlled in temperature or in power and adjustable in height independently for each set. A portion of the electrical resistors are mounted parallel to the axis of the furnace, the other heating cells each constituting a longitudinal heating zone independent of the other longitudinal zones and having, at the vault side, heating elements composed of sets of electrical resistors subdivided into several independent transverse sub-zones, in which the electrical resistors are mounted perpendicularly to the axis of the furnace. The invention is applicable to the manufacture of curved and toughened panes.

Furnace for heating glass sheets

In positioning of a glass sheet relative to cambering and/or other heat treatment tools during a treatment, the glass sheet (2) heated to beyond its softening point travels flat on a conveyor (3) before being stopped beneath a generally shaping upper element (8) against which it is applied and is then released onto a lower element (10) by which shaping optionally continues and/or the glass sheet is transferred to another device, particularly a cooling device by thermal tempering. The position of the glass sheet (2) relative to the upper element (8) and/or the position of the upper element (8) relative to the lower element (10) are controlled by members integral with the upper element (8).

Method and apparatus for positioning of a glass sheet relative to

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Thourotte, France

Jean-Marc Petitcollin