Abstract: A novel method is disclosed for producing honeycomb structures with a virtually non-abrasive smoothly rounded edge between opposed end surfaces of the honeycomb structure and a peripheral bounding wall, so as to avoid detrimental cutting and abrading of surrounding supporting and insulating material utilized in vehicular applications.

Abstract: A soldering method is provided which includes applying a solder paste onto a pad for a surface-mount component on a bottom side of a printed circuit board, applying an adhesive to a surface-mount component receiving site on the bottom side of the board, placing a surface-mount component on the bottom side so as to contact the solder paste and adhesive, and reflowing the solder while curing the applied adhesive to affix the surface-mount component to the bottom side of the board. This method also includes disposing a through-hole component on the top side of the board and mass soldering the bottom side of the printed circuit board to join the through-hole component to the board.

Abstract: A ceramic honeycomb structural body for catalytic converters and filters for removing fine particles can be provided which is secured firmly in the catalytic converters with high reliability, minimum volume and small strength to external pressure without displacements and breakage thereof and a loss of expensive noble metals, by forming at least one step on the outer circumferential surface of the honeycomb structural body so as to form at least one recessed portion or protruded portion on the outer circumferential surface; the recessed portion or the protruded portion has a rough surface or is formed discontinuously to afford firm and safe holding of the ceramic honeycomb structural body in the vessel of the catalytic converter via a sealing member and/or a cushioning member.

Abstract: A catalyst carrier body of flat and corrugated metal strips is arranged in layers mounted in a metallic housing which can be easily manufactured and is suitable for mechanical and thermal stresses, as well as a process for its manufacture. The catalyst carrier comprises an anticlockwise folded coil form which is pressed into the desired final shape and is encased in a metallic jacket.

Abstract: A catalytic converter with a one piece housing is made by inserting catalyst elements into opposite open ends of a sheet metal tube until their support mats abut against preformed annular ribs after which annular ribs are formed in the tube to engage the other ends of the support mats and the ends of the tube are pinched together to form sealed end closures with gas flow passages in them.

Abstract: A process for manufacturing a honeycomb body having a multiplicity of at least partly structured metal sheets defining a multiplicity of channels through which a fluid can flow includes stacking at least partly structured metal sheets into a plurality of bundles of metal sheets having ends. Each bundle is folded about a respective bending line defining a folded edge of each bundle and the folded edges are simultaneously or subsequently moved toward a central region. The ends of the folded bundles are entwined in the same direction, such as by rotating the central region and contracting a form surrounding the bundles. The entwined bundles are encased in a prefabricated jacket by pushing the entwined bundles into the prefabricated jacket or surrounding the entwined bundles with the prefabricated jacket.

Abstract: An apparatus for assembling a catalytic converter, comprising a casing assembling device which includes a stationary receiving stand onto which one of the casing halves is placed with its inner surface directed upwardly, a positioning member movable between a position in which an end face of the catalyst abuts against the positioning member within the casing on the stationary receiving stand and a position outside of the casing, a lift bearer capable of holding the other casing half with its inner surface directed downwardly and liftable above the stationary receiving stand, and welding machines disposed on opposite sides of the stationary receiving stand.

Abstract: In an exhaust gas cleaning apparatus, at least two honeycomb core bodies each carrying a cleaning catalyst are arranged, with at least one axial space therebetween, in a metal casing having an enlarged-diameter portion. The outer peripheral surfaces of the core bodies are fixed to the inner surface of the casing so that each core body is expandable and contractible axially. The result is that separation between each core body and the casing can be prevented, thus improving the durability. Further, an excellent cleaning performance can be achieved not only due to the heat insulating effect as well as the gas stirring effect by the enlarged-diameter casing portion, but also due to the gas turbulent effect by the inter-body space.

Abstract: A method of diametrically contracting a cylindrical body, includes the steps of grasping the cylindrical body with a plurality of elongated grasping members, preparing a cylindrical drawing die having an opening at one end and a tapered inside peripheral surface, drawing the grasping members together with the cylindrical body into the drawing die, through the opening, and applying a compression force to the cylindrical body through the grasping members due to the passage along through the tapered inside peripheral surface, to thereby cause the cylindrical body to be diametrically contracted. During the drawing process, since the cylindrical body does not come into direct contact with the drawing die, neither scratches nor baking cracks are produced on the outside surface of the cylindrical body.

Abstract: A catalytic converter for purifying exhaust gas from an automotive vehicle engine. The catalytic converter is composed of a metallic carrier for catalyst metal, disposed inside a casing. The metallic carrier is constructed of a main sheet metal structure which is formed by turning up an elongate flat sheet metal in a zigzag manner in cross-section, so that the main sheet metal structure has a plurality of parallel flat portions. The adjacent flat portions define therebetween a space. The main sheet metal structure is coated over all of its surfaces with an electrically insulative alumina layer. A plurality of corrugated sheet metal spacers are disposed and secured in the respective spaces thereby to define fine gas passages through which exhaust gas flows. Thus, the main sheet metal structure is electrically insulated from the corrugated sheet metal spacers, so that electric current is passed only through the main sheet metal structure.

Abstract: Flow dividers for dividing a hot gas flow into serveral partial flows through parallel internal channels are used in heat exchangers and as catalyst carriers, and can be produced by shaping the flow divider from metallic aluminium through extrusion or winding, then converting it to hydrated aluminium oxide through anodic oxidation while it is slowly moving down into an electrolyte (4), and finally converting it to alpha-alumina through heat treatment.

Abstract: A catalytic converter of the automotive type comprising a reduced central oval section that compresses a support mat around a catalyst substrate, the reduced central section comprising radially inwardly biased ribs that are parallel to the longitudinal axis of the converter.The converter can be made by inserting a catalyst substrate and surrounding support mat through the open end and into the central portion of an oval sheet metal tube, after which the reduced section and longitudinal ribs are formed in the central portion of the tube to compress the mat and securely engage the substrate, and the ends of the tube are pinched together to form sealed end closures with gas flow passages therein.

Abstract: Disclosed is an apparatus for supporting a ceramic honeycomb element which is anisotropic in modulus of elasticity and in strength. The support apparatus comprises a shock absorber which is interposed between a casing and the honeycomb element so that a force of pressure acts on the honeycomb element in high-strength directions of the honeycomb structure thereof.

Abstract: A catalytic converter of the automotive type comprises a converter housing body with a reduced central section that compresses a support mat around a substrate, the ends of the body being spherical for attachment to spherical flanges on end bushings or being an integral part of the body. The method of manufacturing the converter substrate and converter is also disclosed.

Abstract: A method of producing a metal support for an exhaust gas catalyst. The method comprises the steps of: (a) mating respective end portions of flat and corrugated metal strips in such a manner that respective major portions of the strips extend in opposite directions; (b) putting the mated end portions of the strips between two generally flat holding members; (c) winding the major portions of the flat and corrugated metal strips around the holding members overlapping one on another by a predetermined number of times, thereby to produce an oval structure which includes the flat and corrugated metal strips and the holding members; (d) drawing the holding members from the oval structure thereby to provide a semi-processed oval assembly which has two generally flat bores left therein; and (e) pressing the semi-processed oval assembly in a manner to eliminate the bores thereby to provide a tightly wound oval assembly of the flat and corrugated metal strips.

Abstract: A process and an arrangement for producing a supporting body for a catalytic reactor is disclosed. In order to reduce thermal stress between the casing tube and the wound metal supporting body of an exhaust gas catalyst, the temperatures of which vary significantly during operation, it has been proposed to provide the ring-type composite of metal strips fastened in a casing tube with slots extending in longitudinal direction. This type of production results in high expenditures. The new process and arrangement of the invention provides that incisions are made directly into the metal strips before the winding or folding of the supporting body, so that a subsequent processing becomes superfluous. The thus produced supporting bodies have a plurality of incisions extending within the ring-type composite which can also prevent the buildup of thermal tensions or stress. The new supporting bodies are used for exhaust gas catalysts of motor vehicles.

Abstract: A metal catalyst carrier body assembly and a method of producing the same includes a metal catalyst carrier body having a given length, two end surfaces and a honeycomb structure formed of textured metal sheets through which gas can flow. A jacket tube surrounds the honeycomb structure and is shorter than the given length. At least a portion of the end surfaces is brazed. The jacket tube has ends each being disposed at a distance from a respective one of the end surfaces being greater than the brazed portion.

Abstract: An identification card with an integrated semiconductor circuit (13) which is mounted on a secondary carrier (11) and which is electrically connected to conductor patterns (3, 5) on both sides of the secondary carrier (11). The secondary carrier (11) is mounted in a primary carrier (29) together with the integrated semiconductor circuit (13). The secondary carrier (11) comprises a plated-through hole (7) which is partly removed in order to form a recess (15) in the secondary carrier (11) in which the semiconductor circuit (13) is accommodated. The semiconductor circuit (13) is electrically connected, by means of connection wires (23, 25), to a conductor pattern (3) on the secondary carrier (11) and, also using an electrically conductive glue (21) and the metal hole plating (18) of the remainder (17) of the plate-through hole (7), to the other conductor pattern (5) on the secondary carrier (11).