Abstract: A process and a device for producing a plastic sheet of high optical quality and including at least one layer having a base of a polyurethane exhibiting energy-absorbing properties. The polyurethane layer is obtained by extrusion followed immediately after by a finishing by a pressing at a temperature higher than the temperature of the softening point of the polyurethane layer. The finishing imparts to the sheet optical quality making it suitable for use in the production of laminated glazings.

Abstract: Disclosed are techniques of heating and bending glass sheets by gravity, in particular for the production of laminated automobile glazings. In the techniques considered, the glass sheet is carried in a horizontal position by a carriage that brings it step by step into the cells of a furnace where it remains successively during its heating. According to the invention, the heat capacity of walls (26) of the cells has a value lower than that of carriage (18) and of the glass sheet. To heat all the glass sheets in the same way and to limit the reaction time of the furnace, the temperature of heating resistors (31) is regulated, and the weight of the carriage to be heated is limited. The latter can advantageously consist of two parts, one of which remains outside the furnace.

Abstract: A blow box for the thermal tempering of panes of glass. To temper different sizes of glass, the air supply to selected blow tubes or blow tube groups in a blow box having a blow nozzle field disposed to handle relatively large panes of glass is blocked in the edge areas of the blow box, and in this manner the blow nozzle field supplied with forced air is adapted to the shape and size of the glass pane to be tempered. The adaptation of the blow nozzle field to the shape and size of the glass panes takes place, for example, with the aid of a template-like slide block having an opening corresponding to the glass pane, which slide block is arranged inside the air distributing box immediately in front of the front plate provided with the nozzle pipelets and which can be exchanged for a different slide block.

Abstract: The invention relates to the tempering of sheets of glass and optionally their bending by the so-called contact process. It proposes a process in which the edge stresses of the glass sheets are reinforced by cooling the edges of the glass sheets in relation to their central zone, particularly by blowing on these edges with a cooling gas. It also proposes a device to perform this preferred cooling of the edges, as well as glass sheets thus tempered. The invention applies to the production of glazings having nonfragile edges, particularly for the automobile.

Abstract: A blow box for thermal tempering of panes of glass is disclosed. To temper different sizes of glass, the air supply to selected blow tubes or blow tube groups in a blow box having a blow nozzle field disposed to handle relatively large panes of glass is blocked in the edge areas of the blow box. In this manner, the blow nozzle field supplied with forced air is adapted to the shape and size of the glass pane to be tempered. The adaptation of the blow nozzle field to the shape and size of the glass panes takes place, for example, with the aid of a template-like slide block having an opening corresponding to the glass pane, which slide block is arranged inside the air distributing box immediately in front of the front plate provided with the nozzle pipelets and which can be exchanged for a different slide block.

Abstract: The invention relates to a connecting part between a rigid mechanical element and a hose in which a fluid at high pressure travels. The connecting part has a hollow tubular part B enlarged at one end into a head (1) and driven into a hose A, an internal locking pipe C in the hollow tubular part B, and a clamp D.

Abstract: The invention pertains to a process and device for the gripping at a storage station, transfer and placement of a sheet of flexible plastic material at the stacking station in an automatic production process for compound structures, especially compound panes. In accordance with the process, the sheet made of flexible plastic material is grasped by suction connected to a swinging stamp, first exerting suction on the median part of the sheet, while extending this suction progressively up to one end of the sheet, then by swinging back, extending said suction over the entire surface thereof, while the sheet is simultaneously placed flush on its support, generally the subjacent sheet.

Abstract: In glass tempering using a cooling gas, the impact of gas jets on glass is modified through the use of perturbations to which said jets are subject. The perturbations may be introduced laterally with respect to the tempering jets, and spaced from the opening providing said tempering jets. The characteristics of the perturbations vary cyclically. The invention makes it possible to obtain homogeneous tempering, even for highly bulged glass sheets.

Abstract: An automatic routing device for sheets made of plastic material utilized especially in compound panes has a cutting head with a band having a sharp edge in the form of a band saw blade. The cutting head is mounted to a structure allowing the cutting head to move along three orthogonal cartesian axes and to rotate along two orthogonal rotation axes. An electronic and numeric command and control device is provided to control the head.