A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer (40) controlling a laser (30) to direct the laser energy onto the powder (26) to produce a sintered mass. The computer (40) either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For eac...

Extruded polyvinyl butyral (PVB) sheet roughness is controlled by use of PVB resin lightly cross-linked through stable intermolecular linkages.

Disclosed is a drafting material comprising a transparent base material with a hydrophilic coating which readily accepts ink, ensures rapid drying of the ink and can be marked in a wipe-resistant manner. The hydrophilic coating of the drafting material includes sulfonate group-containing copolyesters which are preferably present in an amount of 30 to 70 percent by weight. The drafting material can...

A release ski binding comprising a sole plate having thereon a rear jaw for a ski shoe, a central part thereof being pivotal relative to the ski about a vertically upright axis and about a transversely extending axis. The sole plate is held in a skiing position by an elastic holding mechanism on the ski. The holding mechanism is responsive to a swivel movement occurring between the sole plate and ...

PURPOSE:To increase a diameter shrinkage process quantity and raise a critical current density by roughing the surface of a superconductive compound material of which outer sheath is made of cupper and which was subjected to a heat process, inserting the material into a soft cupper tube, applying a tightening process with a specific approach angle, and thereafter applying a diameter shrinkage proc...

PURPOSE:To prevent easily CuTi intermetallic compound from being formed by giving beforehand a metal film coating treatment to the surface of material before making a compound process of juxtaposing NbTi group alloy and Cu group alloy. CONSTITUTION:NbTi alloy rod 1, after metal film coating treatment like Ni plating, etc., is inserted into a Cu pipe 4 and given together a cold drawing process into...

PURPOSE:To acquire a superconducting device which can maintain good superconducting properties by carrying out a variety of heat treatments at a temperature condition of a specified temperature or below to RE-M-Cu-O oxide superconductor layer in a state of high critical temperature. CONSTITUTION:RE-M-Cu-O oxide superconductor layer (RE is at least one kind of element selected from rare earth eleme...

The invention comprises polymer compositions containing cross-linked biodegradable derivatives of chitin for use in preventing adhesion between body tissues.

Alkenyl aromatic thermoplastic synthetic resinous elongate foam bodies having a machine direction, a traverse direction and closed noninterconnecting gas-containing cells are prepared using at least 70 percent by weight of 1,1,1-trifluoroethane and or 1,1,1,2-tetrafluoroethane as a blowing agent or part of a blowing agent mixture. These foam bodies have an average cell size of 0.01 to 0.3 millimet...

A device (30) for sensing fluid behavior, e.g. flow, in a conduit (34) such as downhole in a well, comprises a tool (36) having two or more spaced sensors (38,40) for interacting with a medium within the conduit to produce data signals. The sensor data signals may be compared to determine movement of the medium within the conduit and about the device. The device is particularly suited for determin...

An armature assembly for an electromagnetic clutch includes a plastic spider having a central sleeve which is joined to a central driven hub by insert molding. A circular web is molded integrally with and extends radially from the sleeve and carries an annular armature disc which is adapted to coact with the electromagnetic rotor of the clutch. When the clutch is energized, the web flexes adjacent...

The invention refers to a process of forming shaped articles from starch, which process comprises: (a) heating a composition comprising a pre-processed and essentially destructurized starch/water material, at a water content in the range of from 10 to 20 % by weight based on the weight of the composition to a temperature sufficient to essentially destructure the starch. (b) transferring the me...

This invention concerns polymeric films having slip and anti-static properties. This is achieved by the polyolefin films having on at least one surface a coating of a composition including a silicone slip agent having a viscosity of 10,000 to 600,000 centistokes at 25 DEG C in combination with an anti-static agent including an ethanolammonium cation. The slip agent is preferably polydimethylsiloxa...

Polymers having improved lifetimes and more uniform properties are achievable using the technique of micro-encapsulation to control the release of essential polymer additives such as antioxidants. The micro-capsules are prepared by spraying an emulsion of the polymer additive and aqueous sodium alginate into a cross-linking bath containing an aqueous solution of a di- or multi-valent metal salt. I...

The transducer comprises a protective pressure resistant casing 1, a capacitative sensing element 4, an interface to an electrical connection 2, a pressure interface to the fluid to be measured 3 and an electronic processing circuit 5. Sensor diaphragm 12 moves between fixed electrodes 17 under the influence of an internal fluid which is isolated from the fluid to be measured and the interior of t...

A sonic window suitable for use in sonar applications wherein an elastomer such as natural or synthetic natural rubbers, a low air entrapping fiber or fibril used for reinforcement, fillers, and thermosetting resins are formed into desired window configuration. The low air entrapment associated with the fiber or fibrils produces a remarkably sonicly transparent window.

The metal is surface-plated with a ternary plating alloy comprising Cu (60 - 70 wt%), Ni (4 - 14 wt%) and Zn (the rest). The Zn amt. is controlled as follows. The top surface of the plating contains 4 wt% or less of Zn, to a depth of 50 angstroms the plating has an increased amount of Zn, and when the depth is greater than 50 angstroms the amount of Zn lies between 4 and 14 wt%. The composite is o...

A burner for the partial combustion of a solid carbonaceous fuel wherein coal, e.g., finely divided coal, is supplied to a reactor space via a central channel disposed along the longitudinal axis of the burner, and oxygen-containing gas is supplied via at least an annular channel surrounding said central channel, and heat from the combustion is removed from the hollow front face of the burner by c...