A process for the manufacture of a polyamide powder comprising polymerizing in solution a reaction mixture comprising a monomer lactam or lactams capable of generating said polyamide in the presence of an N,N'-alkylene bisamide.

PURPOSE:To effectively use a space in a terminal bed made of resin materials by insert-forming a pair of terminals in the terminal bed, by connecting them to both ends of an exciting coil while disposing a diode in a space between the terminals, by connecting lead wires from the diode to both terminals. CONSTITUTION:A terminal bed 16 made of resin materials is fixed to the rear surface of a yoke 3...

A downhole logging tool for use in gathering data within a borehole and sending those data to monitoring equipment at the surface by means of a fiber optic cable (33c), comprises a system for coupling a data signal into at least one optical fiber of the cable, the system comprising: a light emitting diode (233) for receiving an electrical signal indicative of the data and converting the electrical...

A composite foamed product, particularly a prosthesis, is prepared by impregnating a silicone rubber into an open-celled foamed material. The foamed material may be a natural rubber sheet (10) and the silicone rubber is urged into the cells of the foamed material by means of a roller (12).

In well drilling, a downhole telemetry system, employing pressure pulsing of mud flow down a drillstring, comprises a valve having a pattern of orifices which variably chokes mudflow to cause dependent variations in back-pressure at the surface. The pattern of orifices is preferably formed by one or more orifices in each of two mutually telescoping sleeves 116, 120 whose relative positions determi...

PCT No. PCT/GB94/00976 Sec. 371 Date Oct. 12, 1995 Sec. 102(e) Date Oct. 12, 1995 PCT Filed May 6, 1994 PCT Pub. No. WO94/26203 PCT Pub. Date Nov. 24, 1994The invention provides an apparatus and method for delivering laser radiation to a substrate (20,120) involving a laser radiation source (1), delivery means (2) to transmit the laser radiation from the source, a delivery head (3) to direct the l...

The present invention relates to a plant cellulose film composed of by weight 50-90% of plant cellulose, 0.2-40% of modifier and 5-20% of water. The plant cellulose film may contain herbicides, insecticides, germicides, fertilizing nutriments of N, P and K, trace elements and rare-earth elements. The plant cellulose film may be used as decomposable farming film and packaging material for goods, fo...

A braking facility is described for a four wheel drive vehicle having front and rear axles (11,10) with front and rear pairs of wheels (W1, W2), an engine (E) driving the rear wheels (W1) and also connectable to the front wheels (W2) via a four wheel drive clutch (12), and left and right hand brakes (18, 19) on the rear axle (10) operated by a main brake actuating system (20-24). The braking facil...

A retail trading apparatus including a graphics plotter for printing graphical representations of retail store shelves and goods placed on the shelves.

The use of falling-film evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than abou...

Procedure for production of a chemical-resistant halogenous plastic. Reactive groups are added to a halogenous polymer and the polymer is cross-linked by reaction with a multifunctional organic compound under the influence of heat during or after the processing of the material. PVC is a favoured polymer, but the method is also applicable to the production of cross-linked products from other haloge...

A photosensitive article containing: (a) a lower photoresist layer sensitive to radiation in the wavelength range of about 300 to 1000 nm; and (b) a thermoplastic upper layer which is capable of being removed from the photoresist lower layer without affecting the photosensitivity of the lower photoresist layer. A process for transferring and developing an image involving the steps of: (a) producin...

Die Erfindung bezieht sich auf bahnförmige Schaumstoff-Platten aus Polyolefinen, die aus treibmittelhaltigen Polyolefin-Formmassen durch Extrudieren, Aufschäumen und Expandieren dieser Massen hergestellt sind und bei deren Herstellung halogenfreie Kohlenwasserstoffe und/oder CO2 als Treibmittel verwendet werden. Die erfindungsgemäßen Schaumstoffplatten weisen direkt nach ihrer Fertigung, ohne zusä...

(Object) To improve the drivability by controlling a target engine speed according to an engine load and a vehicle running condition to ensure an actual engine speed. (Constitution) In controlling a speed ratio of a continuously variable transmission, an adaptation factor A as an element for deciding a target engine speed is computed according to constants a and b, an average engine load theta th...

This invention provides reinforced composite structures composed of a matrix and a dispersed phase, where the matrix is a hydrogel containing water and a solubilized vinyl alcohol homopolymer, the dispersed phase contains a plurality of uniformly distributed acicular regions comprising fibrils formed from a highly oriented crystalline vinyl alcohol polymer, where the diameter of the said fibrils i...

An apparatus and method for recording information on an optical memory element, characterised in that the condition of a recording unit (2c,3) of the element is checked before and after the recording operation, the recording and checking operations being carried out within the time that a laser beam irradiates the recording unit.

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.