Abstract: In a device for planing a sheet metal strip under tension as applicable in particular to rolling mills, the strip is passed between at least two small-diameter working rolls while being subjected to alternate flexural deformations in opposite directions as well as a third working roll located downstream with respect to the first two rolls and supported by a frame which is capable of adjustable pivotal displacement with respect to the first two rolls.

Abstract: The invention consists in a process for consecutively coating a metal band with at least two different coating alloys, on one production line, whereby, to pass from a first product to the second, a secondary tank (8) containing the second alloy is disposed in the main tank (2).The process is used for the continuous production of coated metal sheets.

Abstract: The plasma matrix display unit comprises a plurality of cathodes perpendicular to a scan anode and to at least one display anode in a gastight enclosure. All the cathodes are positioned on a rear plate. A front plate is transparent at least at the level of points aligned in parallel in the proximity of the display anode. In order to avoid fluctuations of distance between an anode and a cathode during heating operations, longitudinal insulating strips are disposed on the rear plate and form grooves therebetween. The grooves extend under the point lines of the front plate. Each anode is supported on an upper slot of an insulating strip and interacts electrically with the portion of the cathodes emerging from the adjacent groove. The cathodes, insulating strips and anodes are obtained by successive deposition and masking on the rear plate before any further heating. This display unit is designed particularly for the display of large-scale luminous patterns.

Abstract: A gas discharge display screen with a self-scanning function is described herein. All the electrodes are positioned coplanary on a single surface of a rear insulating plate. First and second pluralities of parallel electrodes connected respectively independently accomplish respectively the scanning and displaying functions. A third plurality of parallel electrodes perpendicular to the first and second pluralities of electrodes cooperates with a particular electrode for preionizing the first gas cells of the matrix screen lines.