Abstract: A method for production of a door for a motor vehicle is provided for at least one door inner piece (1) and at least one door outer sheet (2), which are produced separately from each other and are then combined into one. The method includes making the door inner piece entirely or partially of cast aluminum. The door outer sheet is made of aluminum. The edge (13) of the door outer sheet (2) is folded towards the door inner piece (1). The folded edge (13) of the door outer sheet (2) is brought into contact with a mating surface (12) of the outer edge (11) of the door inner piece (1). The door inner piece (1) and the door outer sheet (2) are connected to each other by a laser-welded seam (7) produced by a laser beam directed in the gap between the mating surface (12) and the edge (13).

Abstract: An edging device or hemming device is disclosed with a machine frame (1), an edging bed (2) which is positioned inside said frame where it is raised and lowered with an edging lift and/or a displacement lift. A plurality of edging jaws are provided, which can be moved into the working area of the edging bed (2). Drive mechanisms are provided for the edging bed (2) and the edging jaws (3). The drive mechanisms for the edging lift and the displacement lift are configured as electromechanical drive mechanisms (7) which move the edging bed (2) using driven eccentric cams (12) or cranks. This simplifies the control of the drive mechanisms and reduces the masses of the structural parts being moved.

Abstract: The invention concerns a method and a device for feeding, clamping, and processing, particularly for geometric welding of automobile body components in a work station. The invention method consists of side-section clamping frames which, after receiving a body side section with the help of portal robots which travel along an elevated four-axle portal in the X-Y axis, are brought into the geometrical welding station, positioned at both sides of the body conveyer system for geometrical welding. The device is characterized in that a four-axle portal (2) is arranged above the geometrical welding station and along which four-axle portal (2), on each side of the body conveyer system (1), at least one portal robot (3), from which side-section clamping frames (9) are hung, can travel in the X-Y axis between a position for receiving the body side sections (8) and a position for clamping and welding the body.

Abstract: A motor vehicle door or hatch with an outer sheet and an inner sheet which are mutually supported and secured together at the edge region. An edge strip of the inner sheet is bent down towards the inside of the door to form a bead and secured to an edge strip of the outer sheet also bent downwards towards the inside of the door. A laser weld seam fills the gap between the two edge strips.

Abstract: A process for the embedding or containment of waste materials, especially of radioactive waste materials, by embedding in a ceramic matrix through the intermediary of the chemical precipitation of a hydrosol of the matrix, which is formed through the reaction of a nitrate with ammonia or ammonium hydroxide. In this process, the hydrosol is trickled in a pouring column into a precipitation bath, subsequent to the introduction of the material which is to be embedded, in which the hydrosol particles which are formed during the trickling gelatinize into gel particles. The gel particles are removed from the precipitation bath, washed, dried and finally sintered.

Abstract: In a plant for the mechanical-biological treatment of sewage, an immersion element is rotatably mounted within a settling tank so that the element rotates about a horizontal axis. The immersion element includes a perforated outer tube and an inner tube spaced concentrically within the outer tube. The opposite ends of the tubes are connected by plates so that the immersion element forms an enclosed space filled with support elements for biological growth. The outer tube is formed of sheet metal and holes, elongated in the rotational direction, are punched out of the sheet metal with the punched material forming outwardly directed projections. The immersion element is rotated by a drive motor and during rotation at relatively high speeds the projections from the outer tube extend above the water level and draw air into the sewage and form a sewage-air mixture rotating at high speed.

Abstract: An apparatus charges weakly acidic cationic ion exchange resin particles with uranyl ions by contacting the particles stepwise with aqueous uranyl nitrate solution at higher uranium concentrations from stage to stage. An alkaline medium is added to the uranyl nitrate solution in each stage to increase the successive pH values of the uranyl nitrate solution contacting the particles in dependance upon the uranium concentration effective for maximum charging of the particles with uranyl ions.

Abstract: The reaction gas throughout of the supply duct feeding gas to the bottom of a fluidized bed reactor of the kind shown in U.S. Pat. No. 4,153,004, issued May 8, 1979, is increased by providing the reaction gas supply tube in the form of a bundle of tubes of small cross-section of about 2 mm diameter. Subdivision of the supply tube into hexagonal ducts in honeycomb arrangement maximizes the useful cross-sectional area of the supply tube. With the smaller elemental tube diameters, a higher rate of flow is maintainable without loss of laminar flow behavior, which behavior is maintained in the jet issuing from the subdivided reaction gas supply duct as it flows towards the constricted entrance into the fluidized bed container while being surrounded by a sheath of inert carrier gas supplied by an annular duct surrounding the reaction gas tube.

Abstract: Weakly acidic cationic ion exchange resin particles are charged with uranyl ions by contacting the particles step wise with aqueous uranyl nitrate solution at higher uranium concentrations from stage to stage. An alkaline medium is added to the uranyl nitrate solution in each stage to increase the successive pH values of the uranyl nitrate solution contacting the particles in dependence upon the uranium concentration effective for maximum charging of the particles with uranyl ions.

Abstract: In a fluidized bed reactor total gas feed is through a constricted opening at the bottom of the reactor. A carrier gas supply duct communicates with said bottom. A reaction gas supply tube, disposed within said duct, has an outlet spaced from said bottom and is comprised of a bundle of tubes arranged to dispense an annular stream.

Abstract: A hydrosol containing, in nitrate form, a fuel or fuel-and-breeder material which is projected horizontally in the form of droplets into a gas phase containing gaseous ammonia and allowed to fall in a drip-casting column into a precipitation bath containing ammonium hydroxide. In the gas phase, the droplets are hardened just enough to prevent their deformation upon penetrating into the precipitation bath where the hardening is completed. A falling height of 5 cm is suitable. The granules are washed free of ammonium nitrate, then dried, and then sintered. The heavy metal content in the hydrosol is between 1.5 and 3 moles per liter, and the pH value of the precipitation bath is between 8 and 9. The hydrosol contains the heavy metal in oxide form and the process can be used with a thorium oxide hydrosol or a hydrosol that, in addition to thorium oxide, contains the oxide of hexavalent uranium, in the latter case the hexavalent uranium being present in a proportion up to 25% by weight of the total heavy metal.

Abstract: Radiation-contaminated ammonium nitrate is heated in solution to about 100.degree. C. in the presence of finely powdered calcium oxide or lithium hydroxide. Ammonia and water vapor are given off leaving an alkaline or alkaline earth nitrate which can then be safely decomposed by calcination into a metal oxide and oxides of nitrogen. The metal oxide can be recycled in a continuation of the process. The oxides of nitrogen can be passed through water to produce nitric acid useable in dissolving oxides of fissionable materials and the ammonia may be used in aqueous solution to react with nitrates of nuclear fuel or breeder metals in the very process that produces the by-product ammonium nitrate. Thus, all by-products and reagents can be reconverted and recycled.

Abstract: A method of making metallic oxide or carbide particles of uranium, which prises fuels or breeder materials for nuclear reactors. An aqueous solution of uranyl nitrate or chloride and, if necessary, colloidal carbon is added dropwise into an organic ketone or ketone mixture phase which is located above an aqueous ammonia solution. The thereupon formed particles are sintered.

Abstract: The red mud by-product of the Bayer process by which aluminum oxide is reed from bauxite as an aluminate, is digested with concentrated sulfuric acid or with sulfur trioxide gas to produce sulfates that can be leached out to the resulting mass with water. The solution is then heated at a pH of 1 to precipitate titanium oxide hydrate by hydrolysis. The remaining sulfates of the solution are then obtained in solid form by evaporation, or by precipitation with acetone, and the solid is then roasted to convert the aluminum and iron to the oxide. After leaching out the sodium sulfate with water, the aluminum and iron oxide are separated by the Bayer process, which works in this case even though x-ray diffusion patterns show that the aluminum oxide is mainly .alpha.Al.sub.2 O.sub.3.

Abstract: After separating brine from the slime and drying the same with solids therein, dried solids are subjected to roasting in an oxydizing temperature of 350.degree. to 400.degree. C, and then leaching the roasted material with predetermined acid and withdrawing sulfur oxides from waste gases generated during the roasting step.

Abstract: A method of regenerating fuel and/or breeder elements with thorium as brer material for nuclear reactors. The fuel and/or breeder material is dissolved in an acid such as nitric acid, sulfuric acid or the like and the thus obtained solution is subjected to a liquid-liquid reaction with an extraction substance such as tributyl phosphate dissolved in an organic solvent. The fuel material and breeder material are enriched in the organic phase and the fission products remain in the aqueous phase, whereafter the fuel material and/or breeder material are converted into oxides, carbides etc. Prior to the above mentioned liquid-liquid extraction, the acid solution containing the fuel material and/or breeder material is passed over a sorption column in such a way that the number of mols of adsorbed .sup.233 Pa per time unit equals the number of mols of .sup.233 Pa disintegrating per time unit in the sorption column to form .sup.233 U.

Abstract: A method of making spherical metallic oxide and metallic carbide particles, especially particles consisting of fuel or breeder material for nuclear reactors such as oxide or carbide compounds of uranium, plutonium, thorium and the like with a diameter of from 0.1 to 1.5 millimeters, according to which an aqueous solution of a metallic nitrate or a metallic chloride or a mixture of metallic nitrates or metallic chlorides in which the metallic ions and anions are in a stoichiometric ratio to each other, is added dropwise to an organic phase. The method according to the invention is characterized primarily in that the drops formed from said aqueous solution after congealing, are washed in an aqueous solution containing ammonia and from 0.001% to 0.1% of a non-ionic surface active agent, especially an ethylene oxide condensate, enveloping said particles and preventing them from clumping during the following drying step, drying the thus hardened particles in an air current having a temperature of from 150.degree.