Abstract: A material deposition unit includes a radiation unit designed to emit electromagnetic radiation in a directed manner onto a workpiece along a beam axis, and a powder discharge device that has multiple powder discharge units configured to discharge powder in a directed form onto the workpiece through powder-outlet openings. The material deposition unit further includes a powder division unit having multiple powder channels. A number of powder channels corresponds to a number of powder discharge units. The powder division unit is designed to distribute a central powder stream guided to a feed channel uniformly over the powder channels. Each respective powder channel is connected to a respective powder discharge unit by an exchangeable connecting element. At least one powder discharge unit has an exchangeable powder discharge element, which is elongate, has a first end and a second end, and is arranged at least partially within the corresponding powder discharge unit.

Abstract: A laser processing machine is provided which has a machine frame and a laser generator fastened to the machine frame. The laser generator is movable relative to the machine frame.

Abstract: A laser processing machine having a laser processing head that is open to a workpiece has a device for providing gas to the laser beam guide that introduces a first gas through a first gas inlet into the laser beam guide and introduces a second gas through a second gas inlet into the laser beam guide.

Abstract: ABSTRACT A laser processing machine having a laser processing head that is open to a workpiece has a device for providing gas to the laser beam guide that introduces a first gas through a first gas inlet into the laser beam guide and introduces a second gas through a second gas inlet into the laser beam guide.

Abstract: A laser processing machine is provided which has a machine frame and a laser generator fastened to the machine frame. The laser generator is movable relative to the machine frame.

Abstract: The invention relates to a process for producing a hollow profiled section (7) with bulges (37) which is provided with an end-side closure cover (7), and to a jack bracket (32) produced by means of this process. To allow simple production of an expanded hollow profiled section (6) provided with a closure cover (7) and to demonstrate a jack bracket (32) produced by this process which entails only a low level of manufacturing outlay yet nevertheless ensures a high ability to withstand mechanical stresses, it is proposed that a cup-like cover (7) be pushed into the hollow profiled section (6), with the hollow profiled section (6) being placed into a hydroforming die (1). After the latter has then been closed, an axial ram (8) is introduced into the cover (7) and into the end of the hollow profiled section, in such a manner that the rim side of the cover (7) is radially pressed to the surrounding hollow profiled section (6). The hollow profiled section (6) is then widened by means of hydroforming pressure.

Abstract: A laser processing head collision protection apparatus includes a carrier member, and a laser processing head detachably coupled to the carrier member by a plurality of pairs of truncated cones.

Abstract: The invention relates to a method for producing a peripherally closed hollow profiled element by means of internal high-pressure forming, a hollow elongated blank (5) being inserted into an internal high-pressure forming tool (1), and the blank (5) located completely inside the forming tool (1) after the insertion being compressed in a region lying between its ends (9, 10) during the closing operation of the forming tool (1), after which the compressed blank (5) is expanded into the final shape of the hollow profiled element by means of fluidic internal high pressure.

Abstract: A laser processing head collision protection apparatus includes a carrier member, and a laser processing head detachably coupled to the carrier member by a plurality of pairs of truncated cones.

Abstract: The hot, vinyl chloride-containing gases leaving the cracking furnace heat liquid 1,2-dichloroethane in a first container to the boiling point or to its immediate vicinity, and the 1,2-dichloroethane is transferred into a second container in which it is partly evaporated under a lower pressure than in the first container. The evaporated 1,2-dichloroethane is fed into the cracking furnace, and the nonevaporated 1,2-dichloroethane is fed back into the first container. By supplying fresh, optionally prewarmed 1,2-dichloroethane into the second container, the amount of product evaporated therein is replaced, the prewarming advantageously being regulated through the level of the liquid 1,2-dichloroethane in the second container. The prewarming of the 1,2-dichloroethane can take place in the convection zone of the cracking furnace or by means of a temperature-control medium, for example steam, which has been heated in the convection zone of the cracking furnace.

Abstract: The inventive combination provides for a profitable and efficient utilization of low-pressure waste heat in conjunction with medium-pressure steam. The combination of mechanical and thermodynamic compression for the generation of superheated low-pressure steam is a method that has better results regarding energy and cost than any other known configuration.

Abstract: In an exemplary embodiment, the measuring arrangement including the x-ray tube and radiation receiver, is capable of being locked against rotation, and the patient support is capable of being locked against longitudinal movement. The x-ray beam is selectively limited in extent by means of an adjustable diaphragm. In the case of a locked measuring arrangement and patient support and a limited x-ray beam, the measured values of the radiation receiver are detected by a computer which, from them and from information regarding the cross section of a vessel to be examined, determines the concentration and/or quantity of an x-ray contrast agent therein. The information regarding the cross section is obtained with a normal computer tomographic scanning operation.

Abstract: The description covers a process for the manufacture of vinyl chloride by thermal cracking of 1,2-dichloroethane. The hot gas leaving the reaction furnace is cooled to the inlet temperature of the column in which the hydrogen chloride is separated from the products of thermal cracking of the 1,2-dichloroethane. Within the range of 560.degree. to 480.degree. C. and of 220.degree. to 120.degree. C., one or more cooling stages are applied through which the reaction gas mixture passes at high flow velocity, the cooling device being preferably a single-tube cooler. Starting from about 220.degree. C., a liquid substantially consisting of 1,2-dichloroethane may be added intermittently. The heat transferred to the coolant in the stages of indirect cooling is preferably reused within the vinyl chloride manufacturing process.

Abstract: A planigraphic X-ray apparatus for the preparation of transverse tomographic or planigraphic images of an exposure object, which consists of an X-ray measuring arrangement including an X-ray source generating a polyenergetic X-ray beam penetrating through the exposure object, with a radiation receiver which determines the radiation intensity of the X-radiation as a reference value prior to its ingress into the object, and a further radiation receiver which determines the radiation intensity behind the object in the direction of the radiation as attenuated values, through scanning of the projected X-ray beam at sequential equidistant points, a comparator element which forms a measured magnitude from the two values, as well as a drive arrangement for the measuring arrangement, consisting of a pivot mounting for producing rotational movements of the X-ray measuring arrangement through small equidistant angular amounts about a rotational axis generally coincident with the symmetrical longitudinal axis of the expo

Abstract: A tomographic X-ray apparatus for the producing of transverse laminographic or tomographic images, constituted of an X-ray measuring arrangement having an X-ray source which generates an X-ray beam, whose cross-sectional expanse or spread perpendicular to the X-rayed layer is equal to the layer thickness, and in parallel to the layer is equal to the layer thickness or is lesser than the latter; and including a radiation receiver which measures the radiation intensity behind the object at successive equidistant points, as well as a drive installation for the measuring arrangement, consisting of a pivot mounting for producing rotary movements of the X-ray measuring arrangement through small equidistant angular increments about a rotational axis which is approximately coincident with the symmetrical longitudinal axis of the exposure object; as well as a slide carriage located on the pivot mounting for producing a linear scanning movement (scanning lift) of the X-ray measuring arrangement perpendicular to the dir

Abstract: A patient's support installation for a transverse axial scanning or tomographic X-ray apparatus utilized for producing tomographic X-ray images, in particular of the skull as a laminagraphic object; consisting of a base or pedestal portion having a frame and a horizontally displaceable table plate which is supported on the latter; a holding arrangement encompassing the laminagraphic object on all sides thereof, fastened to the head end of the table plate, which possesses an aperture into which there is introducible the laminagraphic object to a desired depth; as well as means for fixing the skull in the desired position; and an X-ray transmitter or generator for generating an X-ray beam transilluminating the holding arrangement together with the laminagraphic object at the elevation of the laminagraphic plane, and for scanning the laminagraphic object from different directions in the laminagraphic plane; as well as including an X-ray measuring arrangement which is operatively connected with the X-ray generato

Abstract: An X-ray diagnostic installation for producing a transverse layer or planigraphic image including a first X-ray measuring arrangement having X-ray source which generates an X-ray beam whose extent of cross-sectional diffusion perpendicular to the layer is equal to the layer thickness, and equal to or less than the layer thickness in parallel to the layer, and a radiation receiver which measures the radiation intensity behind the object at successive equidistantly located points, as well as a drive arrangement for the measuring arrangement adapted to generate a linearly guided scanning motion extending in perpendicular to the direction of the central beam across the total expanse of the object, in an alternating sequence with a rotational motion about small equidistant angles, whose sum comprises 180.degree., and about a center of revolution lying approximately in the central portion of the layer surface on the main radiation beam.