Abstract: A method of fabricating a through-holed wiring board comprising a step of forming a through hole in a ceramic wiring board with a laser beam, and a step of removing an alteration layer, defined on an inner wall portion of the through hole by solidification after thermal melting, by sandblasting.

Abstract: Process for the manufacture of a containment element for a fluid heated to a temperature exceeding 850.degree. C. A blank made of a refractory metal alloy is coated with a glass-based adhesive, at least one film made of a glass suitable for the material and the plasticity temperature of the blank is laid down on it, the blank is heated to the plastic temperature and subjected to a first stamping operation to shape the chamber of the containment element, followed by a second stamping operation to form the inner or outer flaps of the chamber. The element is then cooled, and finally, heat-treated.

Abstract: The invention is directed to a method for hardening a metallic part by shot blasting. In prior art hardening processes, debris from the projectiles is frequently encrusted on the surface of the part and forms indents whose bottom is often sharp and which may constitute a starting point for rupture caused by metal fatigue. The inventive process allows hardening without damaging the surface of the part. Prior to shot blasting, a metallic protection film which may, for example, be made of nickel or a nickel-base alloy, is electrolytically deposited on the part. The protection film is thick enough to adhere to the metallic part throughout the shot blasting step but thin enough to allow the shot blasting to work harden the part and to impart a residual compressive stress thereto. After the shot blasting is completed, the protection film is removed.

Abstract: A dry sandblasting treatment for spraying abrasives onto a surface of an insulating resin layer, a chemical etching for chemically etching the surface, and a plating process for plating a conductive layer on the resulting insulating resin layer are successively performed. Since the surface of the insulating resin layer is roughened by the dry sandblasting treatment and the resulting surface is subjected to the chemical etching, a minute anchor structure is formed on the surface. Accordingly, the adhesion between the insulating resin layer and a plating layer (i.e., a circuit conductive layer) is improved. Due to the dry sandblasting treatment, the shape of a via hole formed in the insulating resin layer is improved, and an exposed surface of the circuit conductor layer and an inner wall of a through-hole are cleaned.

Abstract: Surface anomalies on pipe are removed preparatory to corrosion coating. The removal is conducted by brushing with wire brush elements or COMAX brush elements which may rotate about axes parallel to the pipe axis or substantially radially off the pipe. Both kinds of brush elements may be used in combination. Before subjecting the pipe to brushing, the surface is particulate blasted to remove ferric oxide and better expose surface anomolies. After wire brushing, the surface is again particulate blasted to provide an anchor pattern of indentations promoting adhesion of the coating.

Abstract: The adjustment cords of a window blind extend downwardly over a first pin fixedly located within a headrail. A second pin in the headrail adjacent the fixed pin has its ends slidably received in a slot enabling movement in a plane closely adjacent to the first pin. The second pin is in continuous contact with the cords and the relative dimensions of the pins and the cofining constraints of the headrail are such that for the standard diameter of the cord, locking engagement will be obtained when the two pins are located in the same horizontal plane. The guide slot for the second pin allows the pin to move to a point past the horizontal plane of normal locking engagement and closer to the fixed pin enabling locking engagement even if the cord diameter is less than normal. The second pin is constructed of a leaded steel subjected to sandblasting which produces a rough and pitted surface on the pin enhancing frictional engagement with the cord.

Abstract: An insert, especially a hard wear resistant insert, such as an insert of cemented hard metal carbide, for use in a mining tool or the like. The insert is especially adapted for being press fitted into the body of a mining tool or the like but may also be brazed or cemented therein. The insert has a rounded outer end and a flat inner end and tapers inwardly immediately adjacent the flat inner end and is rounded at the periphery of the flat inner end thereby eliminating stress risers in the insert and providing for easier insertion thereof into a bore in a tool body into which the insert is seated.

Abstract: A method for treating investment cast superalloy castings wherein the portions of the castings which solidify directly against the mold walls comprise a substantially continuous or encapsulating skin of a metallic and/or nonmetallic composition. In such castings, defects in the form of material voids, including defects present immediately beneath the skin, are eliminated by the application of heat and pressure. The castings are heated to temperatures sufficient to achieve metal movement in the form of yield or creep, and a pressure of at least about 10,000 psi is applied by means of a surrounding gaseous atmosphere. The heat and pressure application deforms the material in the area of the voids and consolidates this material to substantially remove the voids and to thereby improve the performance characteristics of the castings.