Abstract: The installation for curving and tempering a glass sheet (1) comprises a first series (3) of shaping members (20) exhibiting a surface (3a) intended to come into contact with one of the faces of the glass sheet (1) and a second series (4) of members including a central surface portion (5) to which at least one movable part (6, 7) is attached. First adjustment devices (10, 11, 12) enable the profile of the surface (3a) of the first series (3) of members (20) to be modified, jacks (8) control the movement of the movable part (6, 7) of the second series (4) of members in a curve parallel to the profile of the surface (3a) of the first series (3) of members (20), and second adjustment devices are suitable for modifying the profile of the central surface portion (5) of the second series of members (4).

Abstract: An installation for the heating, forming and tempering of glass sheets (8) comprises a furnace (1) for heating glass sheets, at least one forming chamber (4), called a standard forming chamber, and a chamber for tempering the glass sheets, and a series of parallel rotary rollers for supporting the glass sheets and for moving them in the furnace (1) and towards the chambers. The installation further comprises at least one second forming chamber (5), called a deep-forming chamber, in which the forming of the glass sheets is carried out by pressing these on a convex lower surface. Between the furnace (1) and the forming chambers (4, 5) there is provided a turnover chamber (3) comprising a table rotatably mounted for turning over the glass sheets (8) before they are introduced into the second forming chamber (5). The invention is used especially in the production of glazings for motor vehicles.

Abstract: The installation for curving or bending to convex form and tempering a sheet of glass (1) comprises means for heating the sheet and means for bringing this latter between elements (3, 4, 6, 7) for shaping said sheet.One of the series (3) of elements has a surface (3a) which is intended to come into contact with one of the faces of the glass sheet (1). The other series of elements (4, 6, 7) has a stationary portion (5) to which is attached at least one movable portion (6 or 7) which is capable of pivotal displacement through an angle corresponding to the curvature to be given to the glass sheet.

Abstract: A chamber (1) for the thermal treatment of objects comprises in its interior heating means (3, 4) and means (5) to support the objects (2) to be treated, the walls of this chamber comprising a thermal insulating lining, and a portion (30) of these walls being removable to provide access to the interior of the chamber. Substantially all the internal surface of the chamber (1) is lined with cast silica-base plates (13, 14, 15, 16, 17) disposed side by side, having a coefficient of thermal expansion near zero. Used particularly in plate glass tempering furnaces.