Abstract: For purposes of producing barrier layers on the surfaces of thermoplastics, the surfaces are exposed to a treatment gas containing fluorine. The barrier layers are effective against mixtures of polar or non-polar substances such as, for instance, fuels containing methanol. In order to improve the barrier effect, the cooled-off treatment gas is left to act upon the surface, whose temperature at the beginning of exposure is kept between 60.degree. C. and 250.degree. C. [140.degree. F. and 482.degree. F.].

Abstract: A shielding gas for the arc welding of aluminum consists of argon or mixtures of argon and helium. The shielding gas also includes an admixture of 80 ppm to 250 ppm of nitrogen.

Abstract: Argon having a high degree of purity or else a mixture having a high degree of purity consisting of argon, helium, hydrogen, oxygen and/or carbon dioxide are used as the inert gas for TIG, MIG, MAG and plasma welding. For purposes of improving the welding result, 80 ppm to 250 ppm, preferably 120 ppm to 180 ppm of nitrogen are added to the inert gas.

Abstract: A fire extinguishing device has a storage tank for a low-boiling liquefied gas which serves as the extinguishing agent. At least one connection line is equipped with a shut-off valve and an outlet nozzle leading from the storage tank into the area to be protected. A fire monitoring device which actuates the shut-off valve has sensors in the area to be protected. A cryo-compressor is located in the head space of the storage tank connected with an external cooling mechanism.

Abstract: A device to freeze free-flowing and pourable substances in a bath consists of a bath for a low-boiling liquified gas located inside an insulated housing having openings for the introduction of the substances to be frozen and the gas as well as for the removal of the frozen substances. The bath is located in a rotatable hollow cylinder having a rotational axis tilted with respect to the horizontal plane. The inner wall of the cylinder has a ribbon screw above whose lowest point there is a feed mechanism for the substances to be frozen.

Abstract: A temperable treatment chamber for performing therapeutic procedures for patients includes a gas supply unit located outside of the chamber for a breathable gas with at least one inhalation site opening into the patient treatment chamber. An activation device is located inside the chamber for controlling the supply of the breathable gas by the patient.

Abstract: A process for producing and processing multicomponent mixtures on the basis of reaction plastics provides that the liquid mixture is cooled off to a temperature that allows virtually dry further processing. This is done in that the cooled reaction plastic mixture is shaped as a solid piece from which material is rubbed off while it is applied onto a surface to be coated. The rubbed off material melts on the surface to be coated and hardens within a short period of time.

Abstract: The total sulfur content of samples consisting of chemical compounds is determined by the use of gas chromatographic separation of the sulfur and its flame-photometric detection. The samples are subjected to a catalytic reaction in a pipe reactor before the separation whereby all sulfur-containing compounds are completely converted into hydrogen sulfide. The pipe reactor is made from an aluminum oxide material in a purity of at least 99.8% of the corundum type.

Abstract: An absorption mass consists of an oxidic porous carrier substance saturated with CuSO.sub.4. The CuSO.sub.4 is in the form of a monohydrate or with CuSO.sub.4 free from water of crystallization.

Abstract: In processes for high pressure extraction, a gaseous solvent under high pressure is conducted through an extractor filled with solid material and in this process takes on organic components from the solid materials. These are subsequently separated in a separator and the solvent is again delivered to the extractor. In particular, when gas mixtures having a reduced solvating power are used as solvent to increase the selectivity of the components to be dissolved out, high gas throughputs become necessary to produce a certain amount of product. In order to reduce the high gas throughputs, the solid materials are soaked with a gaseous solvent under high pressure without gas extraction before the circulation process begins. The solvent composition as well as the soaking conditions may deviate from the extraction conditions. In this process, prior to the extraction stage, the solid material in the extractor is soaked with a gaseous solvent under high pressure without the occurrence of a gas flow.

Abstract: In order to have a preservation process that is environmentally safe and that prevents bacterial or enzymatic decomposition of the hides, the hides are treated with CO.sub.2 immediately after being pulled off.

Abstract: In a device for the cryogenic pelletization of liquids by dripping the liquids into a coolant having a temperature sufficiently cold to solidify the drops, said device including a liquid container mounted above a coolant reservoir, a dripping unit at the bottom of said container, said dripping unit including an inner disk disposed toward the interior of said container, an outer disk against said inner disk, said outer disk being disposed toward said coolant reservoir, flow openings in said inner and outer disks alignable with each other to permit liquid reservoir, means for rotating one of said disks with respect to the other of said disks to adjust the effective size of said flow openings by adjusting their degree of alignment, the improvement being in that nozzle-like drip-off elements being mounted in said flow openings of said outer disk, and said elements being detachably mounted to comprise replaceable insert elements.

Abstract: A cooling device for cooling a liquefied gas having a low boiling point includes two cooling gas containers connected to each other by vacuum-insulated cooling-line segments. The liquid-gas line runs continuously through the cooling-line segments and the cooling-gas containers.

Abstract: A liquid-jet cutting torch for cutting with liquid oxygen, includes a cutting-oxygen line surrounded all the way to the outlet of the cutting nozzle by a cooling-medium line, by a vacuum insulation and by a cooling-water casing.

Abstract: A valve for safeguarding the outer container of a double wall vacuum-insulated container for low boiling liquified gases against a pressure increase in the insulation space after a loss of vacuum comprises a valve housing fastened in the outer container, a valve plug and an O-ring which, as a result of deformation, act as a sealing element between the valve housing and the valve plug. The dimensions of the valve housing and seal plug causing deformation of the O-ring in the radial direction and the influence of the outside air pressure causing simulataneous deformation in the axial direction.

Abstract: Molded parts are deburred by being cooled down and treated with an abrasive. The parts are cooled down and circulated by a conveying gas which circulates in a circulation chamber, while the parts are treated with an abrasive introduced into the circulation chamber.

Abstract: In longitudinal cutting of continuous castings with high pressure, liquid stream cutting tips, a preheating torch conducted to the liquid stream cutting tip is used for heating up to the ignition temperature.

Abstract: A valve socket for a gas bottle valve of compressed gas containers made of high-alloy chrome-nickel steels consists of a cylindrical neck piece welded-in in the upper cap of the container. An insert is provided with a threaded opening for the vlave. The insert is connected gas-tight and detachable with the neck piece whereby the inside diameter of the neck piece is larger than the diameter of the threaded opening of the insert.

Abstract: A process for blow molding and fluorination of a hollow thermoplastic article includes bringing a blank to rest against the inside wall of the blow mold as a result of introducing an inert blow gas. An inert gas/reaction mixture is then introduced in the hollow article for fluorinating the inside surface of the hollow article. After the inside surface of the hollow article has cooled off, the inert gas/reaction gas mixture is blown in below the melting point of the thermoplastic material.

Abstract: The invention relates to a process for producing a compressed gas container made of austenitic steels by cryodeformation in which the container is cooled by a refrigerated cooling medium to below the prevailing martensite transformation temperature and is expanded to the desired size by the introduction of a pressure medium into the container. Trichlorofluoromethane is employed as the pressure medium.