Abstract: At least one plane blank (20) is cut out from a sheet of metal material, the blank comprising a main part having the developed shape of the wall of the structural element and at least one additional overlap and fixing tab (26, 27, 28), the cutout blank (20) is folded along a plurality of lines (23) so as to form the wall of the structural element comprising a plurality of annular segments that are not in axial alignment out of folded portions (22, 24, 24?, 25) of the main part of the cutout blank (20), and welding is used to fix at least one additional overlap and fixing tab (26, 27, 28) on at least one of a folded portion (22, 24, 24?, 25) and a second overlap tab.

Abstract: Method for producing parts for passive electronic components according to which: a laminated strip (1) is produced which is constituted by at least one stack of a thin metal strip and a layer of adhesive material, and at least one part (6) is cut from the laminated strip (1), the cutting operation being carried out using a method which comprises at least one step for etching by means of sandblasting. Parts produced.

Abstract: The invention concerns a treatment method which consists in coating at least one surface of a brittle thin metal strip (1) with a coating film (3, 3?) comprising at least a polymer material, to obtain on the strip an adhering coat with a thickness ranging between 1 and 100 ?m, modifying the working and breaking properties of the brittle thin metal strip (1); then carrying out a step wherein the brittle thin metal strip (1) is subjected to stresses, such as a cutting operation, on the brittle thin metal strip (1) coated with the film coating (3, 3?). The method is particularly useful for producing magnetic parts from strips or ribbons with nanocrystalline structure.

Abstract: The invention concerns a treatment method which consists in coating at least one surface of a brittle thin metal strip (1) with a coating film (3, 3?) comprising at least a polymer material, to obtain on the strip an adhering coat with a thickness ranging between 1 and 100 ?m, modifying the working and breaking properties of the brittle thin strip (1); then carrying out a step wherein the brittle thin metal strip (1) is subjected to stresses, such as a cutting operation, on the brittle thin metal strip (1) coated with the film coating (3, 3?). The method is particularly useful for producing magnetic parts from strips or ribbons with nonocrystalline structure.

Abstract: A method of forming a tubular workpiece which consists in pre-bending a metal plate along at least two longitudinal lines of bend (12–13) then in bending the plate along at least one of the lines of bend (12–13) using a bending member (103–104) that exerts an external clamping force (F7, F8) along a part (23, 24) of the plate towards the at least one of the lines of bend (12, 13). Thereby preventing any sliding of part (23, 24) of the plate along the bending member (103–104) as the bending member bends the part. The bending member is articulated about a virtual geometrical axis (a, c) located inside a tubular section of the workpiece.

Abstract: At least one plane blank (20) is cut out from a sheet of metal material, the blank comprising a main part having the developed shape of the wall of the structural element and at least one additional overlap and fixing tab (26, 27, 28), the cutout blank (20) is folded along a plurality of lines (23) so as to form the wall of the structural element comprising a plurality of annular segments that are not in axial alignment out of folded portions (22, 24, 24?, 25) of the main part of the cutout blank (20), and welding is used to fix at least one additional overlap and fixing tab (26, 27, 28) on at least one of a folded portion (22, 24, 24?, 25) and a second overlap tab.

Abstract: At least one plane blank (20) is cut out from a sheet of metal material, the blank comprising a main part having the developed shape of the wall of the structural element and at least one additional overlap and fixing tab (26, 27, 28), the cutout blank (20) is folded along a plurality of lines (23) so as to form the wall of the structural element comprising a plurality of annular segments that are not in axial alignment out of folded portions (22, 24, 24′, 25) of the main part of the cutout blank (20), and welding is used to fix at least one additional overlap and fixing tab (26, 27, 28) on at least one of a folded portion (22, 24, 24′, 25) and a second overlap tab.

Abstract: A shadow mask support frame for a color cathode ray tube has a rectangular shape overall comprises two end uprights and two lateral uprights. The lateral uprights have a straight main part and two end parts each connected by at least one joining portion to an end upright. The lateral uprights have axes parallel to each other situated in a plane parallel to a reference plane of the frame. Each of the joining portions is in contact through a lateral face with an internal face of a substantially flat wall perpendicular to the reference plane of the frame, so that the end uprights of the frame are in abutment on the joining portions.

Abstract: The invention concerns a method which consists in pre-bending a metal plate along at least two longitudinal edges (12-13) then in bending said plate along at least one edge (12-13) using a bending member (103-104) by exerting, during the bending process (F1, F3), a clamping force (F7, F8) of part (23, 24) of the plate relative to the bending member (103, 104). Said clamping force (F7, F8) can be globally oriented towards the edge (12, 13). The installation comprises at least a member for bending (103-104) the metal plate along a longitudinal edge (12-13) of a tubular section of the frame. The bending member (103-104) is equipped with means (103f-104f) for exerting on a part (23, 24) of the plate a clamping force (F7, F8) countering the sliding of part (23, 24) of the plate along the bending member (103, 104). The bending member is articulated about a virtual geometrical axis (a, c) located inside the corresponding tubular section of the component to be produced.

Abstract: At least one plane blank (20) is cut out from a sheet of metal material, the blank comprising a main part having the developed shape of the wall of the structural element and at least one additional overlap and fixing tab (26, 27, 28), the cutout blank (20) is folded along a plurality of lines (23) so as to form the wall of the structural element comprising a plurality of annular segments that are not in axial alignment out of folded portions (22, 24, 24′, 25) of the main part of the cutout blank (20), and welding is used to fix at least one additional overlap and fixing tab (26, 27, 28) on at least one of a folded portion (22, 24, 24′, 25) and a second overlap tab.

Abstract: Process for manufacturing a strip made of an Fe—Ni alloy of the “&ggr;′ and/or &ggr;″ structural hardening” type, the thermal expansion coefficient between 20° C. and 150° C. of which is less than 7×10−6/K, in which a hot strip is manufactured either by hot rolling a semi-finished product or by direct casting of a thin strip which is optionally lightly hot-rolled, and the hot strip is subjected to a softening annealing operation consisting of a soak between 950° C. and 1200° C. followed by rapid cooling and optionally a pickling operation, in order to obtain a softened strip; a cold-worked strip is manufactured by cold rolling the said softened strip, with a reduction ratio of greater than 5%; and the cold-worked strip is subjected to a recrystallization annealing operation in an inert or reducing atmosphere, carried out either on the run with a residence time between 900° C. and 1200° C.

Abstract: A shadow mask support frame for a cathode-ray color display tube of generally rectangular shape in top plan view. The shadow mask support frame includes two end upstands, which are located opposite each other and which are intended to support a shadow mask, and two lateral upstands, which are intended to keep the end upstands apart or separated from each other. The end upstands and the lateral upstands are of generally tubular shape and constitute an almost continuous closed hollow body containing at least one plane closed line located entirely inside the hollow body and passing inside each of the end and lateral upstands. It may be produced by folding a single metal strip or by fitting two drawn shells together.

Abstract: A shadow mask support frame for a colour cathode ray tube has a rectangular shape overall comprises two end uprights and two lateral uprights. The lateral uprights have a straight main part and two end parts each connected by at least one joining portion to an end upright. The lateral uprights have axes parallel to each other situated in a plane parallel to a reference plane of the frame. Each of the joining portions is in contact through a lateral face with an internal face of a substantially flat wall perpendicular to the reference plane of the frame, so that the end uprights of the frame are in abutment on the joining portions.

Abstract: Process for manufacturing a strip made of an Fe—Ni alloy of the “&ggr;′ and/or &ggr;″ structural hardening” type, the thermal expansion coefficient between 20° C. and 150° C. of which is less than 7×10−6/K, in which a hot strip is manufactured either by hot rolling a semi-finished product or by direct casting of a thin strip which is optionally lightly hot-rolled, and the hot strip is subjected to a softening annealing operation consisting of a soak between 950° C. and 1200° C. followed by rapid cooling and optionally a pickling operation, in order to obtain a softened strip; a cold-worked strip is manufactured by cold rolling the said softened strip, with a reduction ratio of greater than 5%; and the cold-worked strip is subjected to a recrystallization annealing operation in an inert or reducing atmosphere, carried out either on the run with a residence time between 900° C. and 1200° C.

Abstract: Masking device for a color cathode-ray display tube with a flat scree, of the type comprising a support frame for a tensioned shadowmask and a tensioned shadowmask mounted on the support frame so as to undergo tensioning at room temperature, in which device the support frame is made of a hardened Fe—Ni alloy having a thermal expansion coefficient between 20° and 150° C. of less than 5×1031 6 K−1 and a yield stress Rp0.2 at 20° C. of greater than 700 MPa, and the tensioned shadowmask is made of a hardened FeNi or Fe—Ni alloy having a thermal expansion coefficient between 20° C. and 150° C. of less than 5×10−6 K−1.

Abstract: The frame (30) comprises flat sides (30a, 30b, 30c, 30d) disposed along the lateral faces of a right prismatic surface. The sides (30a, 30b, 30c, 30d) of the frame (30) comprise an outer panel (31) and an inner panel (32) which are assembled and fixed to each other and are each constituted by a portion of a thin metal strip preferably reinforced by ribs. Devices (34) for suspending the frame (30) in the glass case of the cathode ray tube may be fixed by clipping or by welding on corner portions (33) of the frame (30).

Abstract: Martensitic or austenitic structural-hardening conductive alloy connection leads. Electronic component and fabrication process.

Abstract: An encapsulated electronic component containing a plurality of connection leads and an outer case, where the connection leads extend externally to the outer case and contain martensitic structural-hardening conductive alloy.