Abstract: A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings of the gear wheel, and removing the molded body from the pressing tool. A pressing tool for pressing, as one part, a gear wheel, includes a matrix, cylindrical first and second molding tool parts which can be translated along and then rotated about a longitudinal axis, and a driver coupled to the molding tool parts or driving them. The molding tool parts can be moved towards and away from each other and the inner surface of the matrix delimits the chamber and is shaped to allow a linear axial sliding movement of the compactable material relative to the matrix.

Abstract: A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings of the gear wheel, and removing the molded body from the pressing tool. A pressing tool for pressing, as one part, a gear wheel, includes a matrix, cylindrical first and second molding tool parts which can be translated along and then rotated about a longitudinal axis, and a driver coupled to the molding tool parts or driving them. The molding tool parts can be moved towards and away from each other and the inner surface of the matrix delimits the chamber and is shaped to allow a linear axial sliding movement of the compactable material relative to the matrix.

Abstract: A sinter metal part with a homogeneous distribution of non-homogeneously melting components, essentially comprising non-homogeneously melting non ferrous metal powder mixtures, produced in the following manner: continuous isostatic pressure sintering of the starting material to obtain densities which substantially correspond to the density of a high-temperature isostatically pressed solid having the same composition, using die in conditions avoiding the occurrence of a liquid phase in powder at temperatures of up to 70% of the metal melting point, preferably up to 60% of the metal melting point, forming a sinter profile substantially possessing a final contour.

Abstract: A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings of the gear wheel, and removing the molded body from the pressing tool. A pressing tool for pressing, as one part, a gear wheel, includes a matrix, cylindrical first and second molding tool parts which can be translated along and then rotated about a longitudinal axis, and a driver coupled to the molding tool parts or driving them. The molding tool parts can be moved towards and away from each other and the inner surface of the matrix delimits the chamber and is shaped to allow a linear axial sliding movement of the compactable material relative to the matrix.

Abstract: A method for limiting chippage when sawing a semiconductor wafer into individual pieces which involves providing a dielectric layer at least in some portions of the wafer surface. A border of the dielectric layer is applied to the margins of the individual parts which are to be formed on the surface of the semiconductor wafer, being applied under such conditions that the margins exert a tensile stress on the semiconductor surface. This produces a symmetrical tensile stress distribution for limiting the chippage of the semiconductor material in the sawing region on the surface of the semiconductor wafer.

Abstract: In sheet-fed rotary printing machines, a sheet transfer cylinder having a sheet-bearing cylinder jacket formed of a plurality of jacket segments arranged next to one another in circumferential direction of the cylinder, the jacket segments extending at least over a sheet-bearing circumferential area of the sheet transfer cylinder, includes locking elements located at respective ends of the jacket segments and engaging in corresponding receiving elements on end surfaces of the cylinder, the locking elements being a pair of guide cams located at each end of the jacket segments, and the receiving elements being receiving grooves formed concentrically in a support disc defining an end surface of the cylinder, the guide cams being guided in circumferential direction of the cylinder and lockable in the receiving grooves.

Abstract: Stabilizing the current gain of NPN-silicon transistors by two annealing processes:a high temperature annealing process for at least 30 minutes at a temperature of 510.degree. to 590.degree. C., anda lower temperature annealing process for at least 30 minutes at a temperature of 380.degree. to 460.degree. C.