Abstract: A semiconductor component having a contact structure for making vertical contact with further semiconductor components and having a substrate (15) which has on a top side with a layer structure having regions with which contact is to be made, includes at least one metal pin (8) which penetrates the substrate (15) perpendicularly with respect to the layer structure. The substrate (15) is thinned until the metal pin (8) projects beyond the underside of the substrate. Metal contacts (12) made of metal having a low melting point are present, if appropriate, on the top side of the component.

Abstract: A welding apparatus for producing at least two spaced welding seams for welding together overlapping ends of two lengths of thermoplastic synthetic resin sheets at a welding station, comprises a frame, a heating device arranged on the frame ahead of the welding station in an operating direction and being displaceable in this direction. The heating device includes at least two spaced welding wedges and a separate heating element arranged in each one of the welding wedges, each heating element being independently thermostatically controllable.

Abstract: A pump for conveying a viscous medium, comprising a feed hose in the pump housing, a support wall extending along the feed hose and supporting the feed hose in the housing, pressure rolls mounted for movement along the feed hose diametrically opposite the support wall and arranged to compress the feed hose between the support wall and a respective pressure roll as the pressure roll moves along the feed hose whereby the feed hose is successively deformed from a normal, expanded shape to a compressed, flattened shape and the viscous medium therein is conveyed from a suction to the output end of the feed hose, and a centering device engaging the feed hose at its periphery for holding the feed hose in alignment with the support wall and for returning the feed hose from the compressed to the normal shape after the pressure roll has passed, the centering device including resiliently yielding support elements mounted in the housing and arranged at both sides of the feed hose, the support wall and the pressure roll d

Abstract: A welding apparatus for welding together overlapping ends of two lengths of thermoplastic synthetic resin sheets at a welding station comprises a wedge-shaped heating device for softening the thermoplastic synthetic resin along the overlapping sheet ends, the heating device being arranged ahead of the welding station in an operating direction and being displaceable in said direction. The apparatus has a frame including two parallel frame parts, a part connecting the two frame parts, the connecting part being rigidly affixed to one of the frame parts and the other frame part being pivotally mounted on the connecting part, and spring steel rods biasing the other frame part for pivoting towards the one frame part. Two oppositely disposed, motor-driven pressure rollers are pressable against each other, one of the rollers being mounted on the one frame part and the other roller being mounted on the other frame part.

Abstract: Holding body for attaching a sealing foil of synthetic material to a foundation, in particular a tunnel wall, consisting of two discs connected to each other and parallel to each other, of which one with its base surface contacts on the foundation, and the other is connected to the synthetic foil, the discs (2,3) being connected integrally to each other by means of at least one bar (4), and the bar (4) having a tearing point of predetermined tearing strength.