Abstract: Thermally curable wet-impregnated rovings are disclosed in which the fibers of the roving are impregnated with a liquid polyepoxide having dispersed therein a latent heat-activatable epoxy curing catalyst, such as dicyandiamide, the polyepoxide dispersion having a room temperature viscosity of from 2000 to 5000 centipoises and a tack of less than about 6 on a Thwing-Albert inkometer. The rovings are produced without organic solvent by passing a dry multifillament roving through an elevated temperature bath of the polyepoxide dispersion, this elevated temperature being insufficient to activate the curing catalyst and functioning to lower the viscosity to enable uniform impregnation. The wet rovings are stored in a supply package.

Abstract: Methods for coating acoustical surfaces without substantially clogging the pores and reducing the sound absorption characteristics. The compositions applied to the surfaces of the acoustical materials in the coating method comprise an aqueous mixture containing a disinfectant, a pigment such as titanium dioxide, a quaternary ammonium compound of the following formula ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon containing from 16 to 20 carbon atoms, R.sub.2 is an alkyl group containing from 1 to 3 carbon atoms, and R.sub.3 is selected from the group consisting of R.sub.1 and R.sub.2, and an air freshener.

Abstract: A sufficiently thick gliding layer is produced on the recording surface of a record carrier of the type comprising an aluminum layer applied over a lacquer layer coated on a support layer. The back surface of the support layer is also coated with a lacquer layer. A fatty acid or a mixture of fatty acids is admixed with one of the two lacquer layers and a metal-diketone or a metal-keto-ester is admixed with the other lacquer layer in approximately in a stoichiometric ratio to the fatty acid. Following the coating of the material with aluminum in a vacuum, the record carrier material is wound into a roll, and stored.

Abstract: A body of steel heated to a high temperature of at least 300.degree. C., e.g. a slab coming from a hot-rolling stage, is marked with alphanumerical characters by training a jet of molten metallic material, preferably consisting at least predominantly of aluminum or copper, onto a face of that body from a nozzle which is two-dimensionally displaceable parallel to that face under the control of a programmable microprocessor. The nozzle is part of a working head to which the marking material is fed in the form of a wire whose leading end is atomized by an electric arc generated between that end and an adjoining counterelectrode. The working head is mounted on a carriage movable toward and away from the steel body to be marked.

Abstract: In a method of roughening the surface of a concrete slab for roads to provide anti-skid properties, an agent for retarding the setting of the concrete is distributed over the slab which has been recently laid and a water-impermeable sheet of plastics material is spread over the upper surface simultaneously with the spraying operation. After the underlying or subjacent layer of concrete has set, the plastic sheet is lifted away and the still soft upper layer of concrete is removed by brushing and spraying with pressurized water.

Abstract: Apparatus for cleaning, plating and/or coating articles comprising a container adapted to contain a liquid cleaning, plating or coating material. A barrel is at least partially submerged in the container and supported for rotation about its longitudinal axis. A novel support for the barrel comprises a pair of rings concentric with the barrel and suspended by a plurality of rollers. Laterally spaced stationary end walls are mounted in fixed positions covering the ends of the barrel. The barrel has end openings and the stationary end walls fit within the end openings. A novel discharge chute extends from inside the barrel to the exterior thereof.

Abstract: A selective metallization process particularly suited for making printed circuit boards comprises the step of treating a substrate having a negative mask thereon with a reactant, e.g., acetic acid, which modifies the surface of the mask without affecting the substrate so as to remove or prevent an active catalytic layer from remaining on the surface of the mask thereby preventing electroless plating on the mask.

Abstract: A continuous book binding process and a book comprising a backbone made by the process. The process comprises forming a book block, applying a wet coating of a primer composition to the spine area of the block, thermally drying said coating to remove a substantial amount of water to provide a flexible film having a uniformly irregular surface, and applying a coating of a hotmelt adhesive over the film, wherein the primer composition comprises an adhesive latex and an amount of ungelatinized granular starch effective to complex the latex water so that it is evaporated in a diffuse manner during the drying step. The layer of hot melt adhesive is not disturbed by the evaporation of residual water from the primer film.

Abstract: Conforming a layer of porous sheet material having a three-dimensionally patterned exterior surface, the material being applied directly on a smooth base member made of plastic, metal, glass, etc., and then applying a coating of a hard-enable film-forming liquid in an amount just sufficient to cover the "hills" of the patterned material and seal its pores, but not to fill the "valleys" of the material when hardened. As a result, contours of the pattern are not obscured. The desired pattern may be the inherent weave (interlaced threads) of a textile or an ornamental design embossed in a non-woven material, or the like. Penetration of the film-forming liquid through the pores and into the interface between the fabric and base member partially adheres the fabric to that member upon application of the liquid, an adherence only completed upon hardening, so that interim adjustment in positioning is provided.

Abstract: A method for treating plastic containers with a resin to improve barrier properties thereof including conditioning with an ionizing gas, dipping container in latex of barrier resin and drying container including removing drop from bottom thereof. Apparatus for carrying out the process is shown.

Abstract: A method of providing a composite sheet material which has soft and pliable hand characteristics, despite being dense, and also high resistance against discoloration and deterioration. The method comprises impregnating and/or coating a fibrous sheet with a mixture of (A) a polyurethane elastomer containing a sterically hindered amino group within its molecular chain, (B) a compound selected from the group consisting of a polybasic acid and its halide, metal salt and ammonium salt, wherein one or more hydrogen atoms remain unreacted, which amount of (B) is within the range of 0.8-5 molar equivalents relative to the sterically hindered amino group, and (C) a solvent for the polyurethane elastomer (A), and subjecting the resulting material to wet coagulation.

Abstract: A process for patterning a target for lasing at X-ray wavelengths from materials which cannot be readily shaped. A substrate of one material is placed in a gaseous atmosphere of another material, and the substrate is cooled below the freezing point of the other material so that a frozen layer of the other material condenses onto the substrate. Part of the frozen layer of the other material is masked, and the unmasked part of the frozen layer is vaporized so that the substrate of the one material is coated with the other material according to the pattern of the mask. The target made by the process is also disclosed.

Abstract: A method of preparing a mold surface for forming a pattern on a molded article includes masking the mold surface, sandblasting the exposed surface of the mold, cleaning the mold surface and then depositing a metal layer on the mold surface to provide a metal coated mold surface having areas of altered surface texture corresponding to the pattern. The mold is then used to bond a resin coating to a masonry unit to provide a decorative surface pattern to the exterior molded surface of the resulting composite masonry unit.

Abstract: A process for treating the interior surface area of a glass nozzle for use in an ink jet printer device. The process includes cleaning of the surface area with a hydrofluoric acid solution under controlled conditions, rinsing and then protecting the cleaned area with a blocking agent to prevent contamination by the atmosphere prior to use of the nozzle in a printer device. The disclosed process is useful in minimizing air bubble formation and lock within the nozzle during use, and in facilitating ejection or purging of such air bubbles as may become ingested by the nozzle during service.

Abstract: A method for continuously manufacturing silicon tapes which are predominantly coated on one side of the carrier, for solar cells. In an exemplary embodiment, a carrier body consisting of a graphite network is conducted vertically upwards through a guide channel situated in the floor of a silicon melt bath and travels through a crystallization region where the molten silicon crystallizes on the carrier body. The surfaces of the guide channel at each side of the carrier path in the vicinity of the crystallization region are wetted by the molten silicon and have different dimensions in a direction at right angles to the carrier path. As a result of the differential in surface tension forces at the two sides of the path, a meniscus is formed which is asymmetrical relative to the channel opening thereby causing asymmetrical coating of the carrier body.

Abstract: Thermally curable wet-impregnated rovings in which the fibers of the roving are impregnated with liquid polyepoxides lacking polymerizable unsaturation and having dispersed therein a latent heat-activatable epoxy curing catalyst, such as dicyandiamide. The polyepoxide dispersion has a room temperature viscosity of from 2000 to 5000 centipoises and a tack of less than about 6 on a Thwing-Albert inkometer. The rovings are produced without organic solvent using an elevated temperature which is insufficient to activate the curing catalyst and which lowers the viscosity to enable uniform impregnation in the absence of excess impregnant. The wet rovings can be stored without running in a supply package which may be cop wound, and running is also resisted in a void-free wet fiber composite so that the wet composite can be wrapped and then heated to cure the same.

Abstract: A multifilament yarn of an aromatic polyamide, in particular poly-p-phenylene terephthalamide, having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex is provided with a water-soluble size, the filaments of the yarn having a cohesion corresponding to a Manra number not higher than 40. The yarn is made by subjecting a non-sized yarn having a moisture content which is lower than its equilibrium moisture content, while under a tension of at most 0.25 cN/dtex, to a continuous wetting treatment with an aqueous solution of a size and subsequently winding the treated yarn into a yarn package. The yarn package contains a single continuous length of the sized yarn. The sized yarn is suitable as warp and weft yarn in the weaving industry.

Abstract: A process for producing colored, resin-impregnated paper sheets with a three-dimensional surface structure. A paper sheet is printed with a pattern using aqueous printing ink. The printing ink which is printed on regions which are to have a thinner lacquer film contains a lacquer repelling material. After the printed sheet is dried, it is lacquered with an aqueous lacquer having a viscosity of 15 to 40 seconds in an AK-4 beaker. The lacquer includes as binder a mixture comprising(A) a mixture of urea and/or melamine resin, dissolved in water, and an aqueous acid as hardener, which cures in less than 100 seconds at a temperature above 100.degree. C. after the aqueous resin solution is mixed with the acid, and(B) a binder selected from the group consisting of(a) water-dilutable polyester resin,(b) acrylate resin, and(c) ethoxylated derivative of glycerin,there being 10 to 250 parts by weight of solids of binder (B) for every 100 parts by weight of solids of binder (A).

Abstract: A decorative laminate and method of manufacture therefor are provided wherein the laminate has a differential texture and a differential gloss wherein the textured regions contain PVC resin particles and have a lower gloss than adjoining regions without PVC resin particles. The decorative article is useful as a floor covering.

Abstract: A method and apparatus for masking from treatment selected surfaces of a turbine blade. The blade is positioned in an apparatus which includes a holder enclosing the airfoil section of the blade and a distinct spaced apart mask member elastically secured to the holder and having a deformable surface covering a surface of the blade spaced from the airfoil.