Abstract: Hydrophilic layers are made to adhere to dimensionally stable polyester film supports by applying to an unstretched or only longitudinally stretched polyester film an adhesive layer from an aqueous coating composition comprising a chlorine-containing copolymer formed of 45 to 99.5 % by weight of at least one of the monomers vinylidene chloride and vinyl chloride, 0.5 to 10 % by weight of an ethylenically unsaturated mono- or dicarboxylic acid or of N-vinyl pyrrolidone, and 0 to 54.5 % by weight of at least one monomer taken from acrylamides, methacrylamides, esters of acrylic acid, methacrylic acid and maleic acid, and N-alkyl maleimides. Immediately thereafter, without drying of the adhesive layer, a subbing layer is applied thereto from an aqueous gelatin solution comprising a plasticizer for the gelatin. After drying of the two layers, they are biaxially or transversally stretched together with the polyester film support, and heat-setted. Finally a hydrophilic layer is applied to the subbing layer.

Abstract: A reaction mixture comprising terephthalic acid and bis(2-hydroxyethyl) terephthalate in a molar ratio of from 1:1 to 1.1:1, and ethylene glycol in a molar ration of from 0.3:1 to 0.9:1 with respect to the terephthalic acid, is heated at a temperature between 240.degree. and 310.degree. C and in an inert atmosphere to produce a precondensate consisting of a low molecular weight esterification product. A first part of the precondensate thus formed is then polycondensed further at a temperature of from 260.degree. to 300.degree. C at subatmospheric pressure to form a high molecular weight linear polyethylene terephthalate, and a second part is pre-glycolised with ethylene glycol to bis(2-hydroxyethyl) terephthalate, which is processed in like manner to the first, and so on in a continuous or batch process.

Abstract: The radiation spectrum from a scene is split according to two wavelength regions to provide two spaced images of the same scene, each from the radiation of a different one of said regions, on the cathode of an image intensifier tube. The images are intensified by means of a desired number of image intensifier tubes and the images thus produced on the anode of the last tube are recombined each in an added different color.

Abstract: A method is described for developing silver halide emulsions wherein development is activated by incorporating in the developing composition or the emulsion a homopolymer or copolymer comprising (meth)acrylate or (meth)acrylamide units in which the ester linked or amide linked group contains at least one thioether sulphur atom.

Abstract: Lysine is optically resolved by forming a salt with sulphanilic acid and selectively crystallizing one of the antipodes from a supersaturated solution thereof. The salt of lysine and sulphanilic acid is a novel compound.

Abstract: A diazo recording process which comprises the steps of (1) information-wise exposing to ultra-violet light and (2) overall heating a recording material comprising a compound yielding an amine on heating, an ultra-violet light-sensitive diazo compound and a coupling component capable of yielding a dyestuff by reaction with unaffected diazo compound when heating said material and wherein the compound yielding an amine on heating corresponds with the following general formula: ##EQU1## in which: R.sub.1 represents1. an aliphatic group or a cycloaliphatic group,2. an aryl group,3. a heterocyclic group, or4. an acyl group,R.sub.2 represents an aliphatic group or a cycloaliphatic group,R.sub.3 represents1. hydrogen,2. an aliphatic group including a cycloaliphatic group, orR.sub.3 and R.sub.2 form together part of a heterocyclic ring.

Abstract: The invention is for an improved process for chemically forming a protective, color receptive coating on the surface of aluminum. The aluminum may be aluminum parts or substrates coated with a layer of aluminum. Absent conventional steps such as water rinses and the like, the process comprises cleaning the aluminum surface to the extent necessary, including desmutting, and contacting the part with a spray comprising an aqueous alkaline solution of a ferricyanide compound, with or without added oxygen, for a time sufficient to form the coating. The treatment is believed to be a chemical oxidizing step similar to the formation of an oxide film electrically using a conventional anodizing process.

Abstract: Composite materials which comprise a matrix of a complex refractory superoy and embedded in said matrix filiform particles of carbide and, in the matrix, a fine precipitation of carbide of the same nature as the one of the filiform particles.

Abstract: A process for producing continuous tone images on an image-receiving material in a diffusion transfer process.

Abstract: Toner powders for developing electrostatic images are provided with improved control of the polarity and the color of the particles by forming them of thermoplastic resin containing in dissolved state therein a normal salt of an organic basic dye, e.g. a Safranine dye, and an organic acid, e.g. a phenoxy acetic acid, having at least 6 carbon atoms and having a dissociation constant less then 4 as measured in water at 25.degree.C.

Abstract: An apparatus for recording information on a dielectric material in the form of electrostatic charge patterns is provided in which a plurality of recording electrodes are provided at one side of the dielectric material, whereas a corona device which is partially screened is situated at the other side of the dielectric material. The screen is in the form of a metallic plate provided with a slit and is kept at a constant DC voltage. An electrostatic charge is built-up at the surface of the dielectric material when the recording electrodes are not energized, and vice versa.

Abstract: An electron beam-sensitive recording material that has a sensitivity to ultra-violet radiation not high enough to provide an optical density in the visible spectrum range of more than 0.2 when exposed with said radiation under the described test conditions, wherein said material comprises:A. at least one dye precursor compound, which is capable of forming a dye when being in working relationship with an electron beam-exposed compound of the group mentioned here under (B), andB. a halogen-containing polymer undergoing dehydro-halogenation on electron beam impact and/or an organic compound containing one or two halogen atoms linked to a same carbon atom that is further linked to at least one electron-withdrawing group, and/or an organic compound that contains at least one non-halogen carrying carbon atom bound to at least one hydrogen atom and at least two electron-withdrawing groups, and/or a polyhalogenated aromatic hydroxy compound.

Abstract: A tank for liquid drainable towards an outlet is disclosed which may be u in appliances where the action of gravity is neutralized such as in artificial satellites. The tank comprises a casing and inside said casing a porous retention material in contact with the inner surface of the casing and designed as a structure with compartments, the sections of the compartments decreasing in size in the direction towards the tank outlet and the dimensions of the pores decreasing in the said direction.

Abstract: There is described a method for sodium-deactivating and/or stocking irradiated nuclear fuel elements, said elements being contacted with a fluid, in which use is made as fluid, of a molten salt mixture which is uncorrosive for the element stainless steels, inert relative to uranium and plutonium oxides by the deactivating temperature and reactive with sodium metal without producing a detonating gas.

Abstract: Photographic silver halide materials are described which comprise as antifogging agent a compound of the formula: ##SPC1##Wherein:X is a hydroxy or carboxy group or a substituent or fused-on azole heterocyclen is 1 to 4, andR is hydrogen, halogen, alkyl, alkoxy, alkoxycarbonyl, sulpho, aryl, fused-on benzene or X.

Abstract: A safety valve which may be used in a pipette or in medical or biological equipment such as collection bottles, employs a carrier which is inserted in a flow line and contains a material which swells in the presence of an unwanted fluid to block the line and provide protection against contamination.

Abstract: Compounds of the class of imidazo[1,2-a]-imidazoles, imidazo[1,2-a]pyrimidines and pyrimido-[1,2-a]pyrimidines useful as central nervous system (CNS) antidepressants; and certain novel precursors therefor.

Abstract: In purifying a normally solid organic peroxide by heating an aqueous suspension of the organic peroxide in an impure state to a temperature above the melting point of the peroxide for converting the suspension to an aqueous emulsion and then separating the resulting aqueous and liquid peroxide phases so that the separated peroxide phase can be solidified by cooling; the heating of the aqueous suspension is effected by injecting finely divided steam therein during its continuous transport in one or more paths leading to the separator for obtaining complete melting immediately prior to entry of the emulsion into the separator without substantial decomposition of the organic peroxide.

Abstract: Images of fusible toner particles on flexible sheet material, such as applied to paper sheets in electrostatic photocopying machines, are fixed to the material by feeding it through a heating zone in which the particles are softened without fusing them and then passing the material through the nip between smooth rigid pressure roller surfaces which are constantly pressed together under a force sufficiently great to join the heated toner particles superficially one to another and to the sheet structure without forming them into brittle resinous films. An apparatus for carrying out the fixing comprises a set of smooth rigid feed rollers constantly pressed together, preferably by structures like those used for the pressure rollers, under a selected pressure suited for advancing the material into and through a radiant heating zone at a constant speed and thence into the nip of the pressure rollers which are driven at the same peripheral speed.

Abstract: This invention relates to new composite materials having, along a director plane, noteworthy mechanical properties, wherein they comprise a resistant material, in flat form disposed parallel to the director plane and flakes or bands or substantially flat form, constituted of or comprising a material with high modulus, said flakes or bands also being disposed parallel to the director plane.