Abstract: A method and a device are provided for joining the ends of strips with two or more surfaces arranged flat on top of each other, more particularly metal sheets that can be coiled, in order to draw these successively through a treatment or machining system. It is provided that the strip ends are joined by means of a plurality of eyelets arranged essentially transversally to the strip direction, wherein initially all holes are simultaneously punched in a first stroke and then all eyelets are pressed in a second stroke. The device has a clamping device and a machining unit, which has a working tool with a plurality of punching and pressing tools, wherein the working tool and a die are displaceable by the distance between two neighboring individual tools and wherein above the punching and pressing tools, a pressing device is provided.

Abstract: A device for compensating variations in tension and/or for adjusting the tensile stress on a conveyed flexible metal material strand, in particular a metal strip, having at least one movable dancer roll which can be wound around by the material strand. At least one dancer roll can be displaced along a path inclinable to the perpendicular, wherein the inclination angle of the path can be adjusted by means of an adjustment unit.

Abstract: Disclosed is an annealing frame, especially for conveying molded aluminum parts during a heat treatment process. The invention is characterized in that said annealing frame comprises at least one annealing frame element (1) that is provided with at least one annealing basket (13) which can be placed therein and can be adapted to the annealing material. Annealing material having the most different shapes can be accommodated in a non-tipping and slip-proof manner in said annealing basket (13) while being conveyed during the thermal treatment process.

Abstract: A device for the levitated guidance of web-shaped material, particularly metal strips, with at least one first radial fan and with at least one flow channel system that is assigned to the at least one first radial fan provides that the at least one first radial fan generates a fluid flow that is transported through the at least one flow channel system to the surface of the web-shaped material for the levitated guidance thereof. The device is characterized in that at least one additional radial fan for increasing the pressure in the fluid flow is arranged in the at least one flow channel system downstream of the at least one first radial fan referred to the fluid flow direction.

Abstract: An oil removing device for cleaning pipes that are present in the form of coils in a furnace that accommodates and heats the pipes, with or without associated cooling zone, has a gas guiding device for feeding a scavenging gas to or removing it from the pipes. The gas guiding device is provided with connections for detachably and sealingly linking with a gas feed line and a gas discharge line. Ends of every pipe are separately connected to one and the same connecting head that has a gas inlet and a gas outlet opening the axially aligned therewith. The end of the gas feed line and the end of the gas discharge line are opposite each other and can be displaced along with the gas inlet opening and/or the gas outlet opening while sealingly connected.

Abstract: The invention relates to a pusher furnace (1) for the annealing treatment of aluminum bars for instance. Rails (7) with plate-shaped sliding supports (8) are provided. Said supports cover the entire width of the rails (7) and are produced with grooves (12) on the upper sides thereof. The grooves extend in the longitudinal direction of the rails (7) in an arrow-shaped manner and serve for receiving driven material. Several sliding supports (8) are juxtaposed and thereby form arrow-shaped expansion joints. The rails (7) and the sliding supports (8) can be easier produced and assembled by virtue of the inventive embodiment of said rails (7) and sliding supports (8). Furthermore, the material (10) can be transported without jolts in as far as possible, whereby said material is mounted on sliding shoes (9).

Abstract: For optimum induction heating of metallic strips (1) of differing widths—particularly in the edge region—one multicoil transverse field inductor is positioned both above and below the strip (1) to be heated, whose coil axes are positioned vertically to the strip surface. In this case, each inductor comprises at least one inductor segment (2, 3; 7; 15; 17), which is constructed as a coil composite of multiple approximately rectangular coils (8, 9, 10; 16; 18) which extend predominantly transversely to the transport direction of the strip (1), the coils (8, 9, 10; 16; 18) having different, stepped transverse extensions and the coil having the highest transverse extension extending at most up to the lateral edges of the widest strip and the coil having the lowest transverse extension extending at most up to the lateral edges of the narrowest strip.

Abstract: The present invention relates to a Zinc alloy yielding anti-corrosive coatings on ferrous materials; characterized as consisting of zinc plus its usual impurities and possibly aluminum and/or lead as well as alloying metals consisting of between x and y% by weight of nickel together with between v and w% by weight of at least one of the metal: vanadium and chrome wherein: x is equal to or higher than 0.001% by weight, preferably higher than 0.04% by weight, y is lower than or equal to 0.6% by weight, preferably lower than 0.2% by weight, v is equal to or higher than 0.001% by weight, preferably higher than 0.03% by weight, w is lower than or equal to 0.6% by weight, preferably lower than 0.04% by weight.

Abstract: A top hat annealing furnace with pivoting features. The annealing furnace has an annealing understructure, an annealing hood, a heating hood and a cooling hood. The annealing understructure and the annealing hood are supported so that they can be tilted between an operating position and a loading position. The heating hood and the cooling hood are provided with doors, which can be closed when the furnace is in use, and opened when it cycle is completed. When the doors of either hood are open and the hood is oriented vertically, the hood can be moved horizontally relative to the annealing hood.

Abstract: A coreless induction furnace includes a vertical melting crucible defining a melting chamber having upper and lower chamber portions and at least two coils. A first one of the coils is disposed so as to surround the upper chamber portion and a second one of said coils is disposed so as to surround the lower chamber portion. The furnace also includes a single-phase load-commutated oscillation circuit converter, a plurality of capacitors and an electrical circuit system electrically connecting the coils, the capacitors and the converter. The electrical interconnection is such that the first one of the coils is electrically connected in series with a first one of the capacitors having a first capacitvie impedance to thereby present a first oscillation circuit, and the second one of the coils is electrically connected in series with a second one of the capacitors having a second capacitive impedance to thereby present a second oscillation circuit.

Abstract: In a process for the operation of coreless induction melting and/or holding furnaces--in which there results in the melting operation at a relatively high induction frequency (as compared to the mains frequency) a slight stirring motion in the melt, but a high degree of effectiveness for the melting process, and in the melting and holding operation at a correspondingly lower induction frequency there results a greater stirring motion in the melt, but a lower degree of effectiveness for the melting process--it is provided that at least one capacitor switched in parallel to the induction coil(s) is provided, which capacitor(s), together with the induction coil(s), form a resonant circuit; and that in the transition from the melting operation with slight stirring motion in the melt to the melting or holding operation with greater stirring motion, or in the reverse transition, the capacitor capacitance and/or the inductance present in the resonant circuit is increased, or as the case may be, decreased.

Abstract: A device for inductive cross-field heating of flat metallic goods has at least one pair of inductors having each one iron core provided with a groove for receiving a lead that extends in the transport direction. The grooves and leads of both inductors of a pair of inductors are mirror symmetrical and the leads of each inductor form two independently switchable lead systems. Each lead system has sections that extend substantially in the transport direction of the metallic goods and whose center lines extend symmetrically to a central axis of the inductor parallel to the transport direction. The individual poles of the lead systems consist of maximum two leads. Each pole of a lead system is arranged between the poles of the other lead system. A uniform temperature distribution in the goods to be heated is achieved by synchronizing the offsetting in time the moments when both lead systems are switched.

Abstract: Described is a low-loss induction coil for heating and/or melting metallic materials, the coil having windings formed by lengths of hollow tubing carrying a fluid coolant. In the central zone of the induction coil, the current is carried by hollow conductors made of copper which at the same time form the hollow tubing. Fitted at least in the windings at one end of the coil is a current-carrying element in the form of at least one braid whose individual conductors are insulated from each other, while remaining windings are designed as hollow conductors connected to the current-carrying element. The use of braids as the current carrier leads, at the end of the coil, to a reduction in eddy-current losses caused by transverse magnetic fields, while the use of hollow conductors in the rest of the coil results in the mean distance between the current flux and the metallic material being heated being kept at the minimum and losses due to this distance thus kept low.

Abstract: A device for inductively heating flat metal objects, with at least one pair of induction coils which form a gap through which the object is moved. The induction coils have an iron core made up of transformer stampings with grooves in which current conductors are arranged. The iron cores of at least one inductor coil have grooves which run in a zig-zag or undulating fashion along the direction of motion of the object being heated. The maximum angle the grooves make with the direction of movement of the object is 60.degree., and the current conductors are disposed in the grooves so as to follow the zig-zags or undulations thereof. The inductor coils of at least one inductor-coil pair include several side-by-side conductors which are arranged so as to carry current in the same direction along the coil. At least some of the current conductors are arranged for selective independent electrical connection to a source of electrical energy.

Abstract: In the operation of a hot metallizing furnace for lengths of metal, in particular metal strip, in which the length of metal to be coated is passed from above through the upper zone of a smelt of a coating material located in a smelt container, the smelt container can be heated by means of an induction coil made up of partial coils arranged axially on top of one another. During hot metallizing the upper partial coil(s) is/are connected to a medium frequency source of electricity in a single-phase manner. For the removal of the deposits which accumulate in the lower area of the smelt vessel, the lower partial coil(s) is/are connected to a three-phase current mains frequency source of electricity. The agitated deposits are then removed from the smelt using a collecting vessel.

Abstract: In an apparatus for contactless guiding of webs of material, in particular metal strips, by means of a gas medium, nozzle boxes are disposed above and below the web of material. The distances of the nozzle boxes from an imaginary, essentially horizontal center plane extending in the direction of transport differs individually or in groups. The positions of the outlet planes of the nozzle boxes are adaptable to the wave form, and each wave trough and each wave crest of the wave form is formed by at least two adjacent nozzle boxes.

Abstract: A sluice for feeding a continually transported material to be annealed into an annealing oven includes two opposing sealing hollow plates spaced from each other to permit the material to pass therebetween and each provided with a coating of ceramic felt. A conduit for feeding buffer gas into the space between two opposing plates opens into that space to fill that space with buffer gas and to prevent oxygen from entering the oven.

Abstract: In a vacuum induction furnace provided with an induction coil, surrounding a furnace crucible, the coil includes a plurality of intermediate layers inserted between the individual windings, and spacer elements also inserted between the individual windings, next to the intermediate layers and at the side of the coil facing the crucible. The spacer elements are formed of insulating material.

Abstract: The device for removing incrustations from the inner wall of a cylindrical vessel comprises a driven shaft supported for rotation in the vessel about its central axis and for a vertical movement along this axis. Impact tools, preferably in the form of prismatic blocks defining a straight edge, are attached respectively to the shaft by a pair of chains in such a manner that the abrading edge of each tool extends parallel to the central axis when the chains are straightened by the centrifugal force.

Abstract: A helical induction coil of large diameter which is to be served with a protective band is suspended from a driving roller having a substantially horizontal axis of rotation so that the coil axis is substantially horizontal. A serving device is supported on the respective convolution to be served and also on immediately adjacent convolutions at the lowermost region of the coil for advancement in the longitudinal direction of the convolutions. Spreading rollers spread the immediately adjacent convolutions from the respective convolution to permit the serving device to advance. The driving roller frictionally entrains the coil and thus rotates the same about the coil axis and the spreading device is advanced at the same speed as but in the opposite direction than the respective convolution so that the position of the serving device diametrally opposite to the driving roller relative to the coil is maintained.