Tire casings are retreaded with precured tread strips in a heated pressure vessel provided with pressure connections which effect simultaneous inflation of the tires and pressurization of the vessel while maintaining tire pressure above vessel pressure. Subsequently a pressure relief system permits the tires to exhaust faster than the vessel. Each tire is prepared for retreading by applying a bond...

Polymeric fibrids containing embedded activated carbon are useful as adsorbents.

Oversize agglomerates produced during the agglomeration of small granular tetrafluoroethylene polymer particles, are conveyed to an agitation vessel where they are subjected to agitation to convert them to smaller size agglomerates.

A continuous-operation centrifuge drum for concentrating suspended solids. The concentrated solids are diverted out of an outer solids space through channels into an inner chamber, whence the concentrated solids are continuously extracted. At least one vortical-outflow space is positioned between the channels and the inner chamber, with the points of which the medium enters the channels distribute...

The invention relates to a method of manufacturing a structured foam starting from a first synthetic resin and a blowing agent, characterized in that a concentrate of the blowing agent in a second synthetic resin as a carrier is prepared by mixing an emulsion of the second synthetic resin with the blowing agent, by then isolating from the emulsion in the conventional manner an intimate mixture (co...

La presente invención se refiere a mejoras en método para adherir un refuerzo de poly(p-fenilentereftalamida) a un compuesto de caucho que comprende: tratar dicho refuerzo con una composición que comprende una dispersión alcalina acuosa desde aproximadamente 10 hasta 50, de preferencia desde aproximadamente 15 hasta 25 en peso de sólidos que comprenden: por lo menos un látex de copolímero de vinil...

La presente invención se refiere a procedimiento para fabricar una mezcla a base de cemento que contiene fibras de refuerzo, caracterizada en que se forma una pasta mezclando cemento y por 100 partes en peso de cemento, 5 partes aproximadamente a 20 partes aproximadamente en peso de un primer material pulvurulento cuyos granos presentan un diámetro promedio comprendido entre 175 y 1/10 del diámetr...

Process in which the fibres are impregnated with a polyamide before a pultrusion, characterised in that the fibres impregnated with a polyamide oligomer or prepolymer are treated while heated to cause the elongation of the polymer chain before the calibration by pultrusion.

An electrically heatable transparent panel (1) comprises spaced electrically conductive bus strips (2, 3) interconnected by electrically conductive heating means (4) deposited on a substrate (5) of glazing material. To reduce the visual obtrusiveness of the heating means (4) as compared with linear heating elements as conventionally used in heatable rear windows or motor vehicles, and for other pu...

The attachment means have a shank 3 which is made from resorbable material which expands after it has been implanted. The outer circumference of the shank 3 is formed in such a manner that it can be placed in a hole 6 in the bone tissue by exerting a force only in the longitudinal direction. As a result of expansion, the shank becomes fixed in the hole 6 and may be of relatively small diameter, wi...

Complications of timing recovery in an ATM receiver (200) are overcome by employing a first phase lock loop (208) including a phase comparator (210), filter (211), voltage controlled oscillator (212) and output counter (214) to lock to systems clock reference (SCR) values which are asynchronously received from a remote ATM transmitter. The SCR values represent the instantaneous values of a system ...

A marker for use in an electronic article surveillance system in which the marker comprises a magnetically soft component and exhibits a pinned wall hysteresis characteristic with a step change in flux at a threshold value of applied field and in which the marker further comprises a magnetically hard or semi-hard component integral with the soft component and whose magnetic state can be switched b...

An adaptive technique for encoding and decoding which facilitates the transmission, reception, storage, or retrieval of a scalable video signal. The invention allows this scaling to be performed entirely in the spatial domain. In a specific embodiment of the invention this scaling is realized by adaptively encoding a video signal based upon a selection taken from among a multiplicity of prediction...

An improved technique for efficient frequency scaling wherein the number of coefficients to be included in each sub-block (e.g. 4x4) is selectable (201), and a code indicating the number of coefficients within each layer is inserted in the bitstream at the beginning of each encoded video sequence. This technique allows the original runs of zero coefficients in the highest resolution layer to remai...

Blends of PTFE and perfluorinated ether copolymers of TFE and perfluoro(propyl vinyl ether) provide coating compositions which have reduced crystallinity and useful lives superior to what would be expected from averaging the properties of the unblended resins themselves.

The invention relates to a system for a process to purify (treat) nitrogen-containing wastewater by biological nitrification and denitrification. The system consists of at least two largely separated reactor compartments, a liquid inlet and a liquid outlet, the first, aerated reactor compartment being provided at the top with an overflow to the second, low-oxygen (oxygen-depleted) reactor compartm...

Disclosed are x-ray contrast compositions for oral or retrograde examination of the gastrointestinal tract comprising a polymeric material capable of forming a coating on the gastrointestinal tract, said polymeric material having atoms containing polarizable electrons thereon, in combination with a divalent cation, and an x-ray producing agent of the formula or a pharmaceutically acceptabl...

An orally or rectally administrable X-ray contrast compsn. comprises a contrast agent having the formula (I), or a salt of (I) in an aq. pharmaceutically acceptable carrier contg. at least one surfactant selected from a zwitterionic surfactant, trimethylammonium bromide, sodium lauryl sulphate, sodium heptadecyl sulphate, alkyl benzenesulphonic acid, sodium butyl naphthalene sulphonate, sulpho suc...

An apparatus for the purification of waste water comprises a reservoir (1) including a primary circulation system (2) for the liquid therein, an influent supply (5) and effluent discharge (6) connected to the reservoir (1), propulsion device (4A,4B) for circulating the liquid in the circulation system and simultaneously aerating it. The reservoir (1) is equipped with a denitrification space (7) co...

La presente invención se refiere a un distorsionador digital (pre-distorsionador o post-distorsionador), para los dispositivos de emisión o recepción, de un sistema de telecomunicación digital, con su modulación compleja de amplitudes, especialmente una modulación cuadrada, de las amplitudes, caracterizado por un dispositivo para convertir los datos Io y Qo, que indican el lugar de la señal de lo...