Abstract: A method of printing a fluorescent image on a surface of a receiver medium comprises forming on the surface by a thermal dye transfer printing process a first image of a first fluorescent dye; and forming on the first image by a thermal dye transfer printing process a superimposed second image of a second fluorescent dye, the first and second dyes having different emission maxima. The method thus enables production of a non-monochrome fluorescent image (that can be substantially invisible in daylight but that is revealed on irradiation with ultraviolet (UV) light) that can be of substantially better quality than those produced by mass transfer printing processes. The method preferably involves the use of three different fluorescent dyes, for improved color image quality. The invention also provides thermal transfer media suitable for use in the method and the resulting printed material bearing a fluorescent image.

Abstract: The invention concerns a cyclic ether derivative of the formula I ##STR1## wherein Ar.sup.1 is optionally substituted phenyl, naphthyl or a 9- or 10-membered bicyclic heterocyclic moiety;A.sup.1 is a direct link to X.sup.1 or (1-3C)alkylene;X.sup.1 is oxy, thio, sulphinyl, sulphonyl or imino;Ar.sup.2 is optionally substituted phenylene or pyridylene;R.sup.1 includes hydrogen, (1-4C)alkyl, (1-4C)alkoxycarbonyl and (1-4C)alkylthio; andR.sup.2 and R.sup.3 together form a group of the formula --A.sup.2 --X.sup.2 --A.sup.3 -- which, together with the carbon atom to which A.sup.2 and A.sup.3 are attached, defines a ring having 5 to 7 ring atoms, wherein each of A.sup.2 and A.sup.3 is (1-3C)alkylene and X.sup.2 is oxy, thio, sulphinyl or sulphonyl;or a pharmaceutically-acceptable salt thereof.The compounds of the invention are inhibitors of the enzyme 5-lipoxygenase.

Abstract: A polyether polyol having an average hydroxyl value in the range 400 to 650 mgKOH/g which is a alkoxylated derivative of a polyhydric alcohol being itself a single compound or a mixture of compounds according to the general formula (I) ##STR1## where R.sup.1 is --H, --CH.sub.3 or OCH.sub.3R.sup.2 is --H, --CH.sub.2 OH or --CH.sub.2 C(CH.sub.2 OH).sub.3The preparation of polyurethanes, including rigid foams, using these polyols, is also disclosed.

Abstract: A composition for the control of unwanted foaming comprising(a) Soya bean oil(b) a mineral oil(c) a finely divided silica(d) an unsubstituted fatty acid monoester of glycerol(e) an unsubstituted fatty acid ester of a polyoxyalkylated sorbitan.These compositions are valuable for the control of foam especially in fermentations since they are stable to sterilization.Also they may be used in paints since they do not give the defects often associated with silicone antifoams.

Abstract: Process and apparatus for centrifugally spinning a fibre-forming material, e.g. a urea-formaldehyde resin, in which the fibre-forming material is supplied in liquid form to the interior of a spinning cup wherein it is divided into separate streams which are led to the outlets of passages through the wall of the spinning cup.

Abstract: Process and apparatus for cutting filamentary material using apparatus comprising a reel fitted with a plurality of spaced outwardly facing knife blades against which the material to be cut is wound and then severed by applied pressure, wherein entanglement of cut fibre is reduced or obviated by impingement against a divergent surface attached to and rotating with the cutter reel.

Abstract: A gear pump is modified by the incorporation of a hollow rod means to permit a liquid additive to be injected into the gear pump at the point at which the gear wheels separate. At this point the pressure is at or below atmospheric pressure and, as a result, the additive can be added uniformly and independently of the pumped liquid flow and pressure.

Abstract: The present invention provides a method for the manufacture of potentially crimpable, synthetic linear polymer filaments which comprises the steps of melt spinning a plurality of filaments, initially partially cooling the hot filaments evenly with a stream of gas, and asymmetrically cooling the filaments further by causing them to contact continuously renewed thin film of liquid.

Abstract: The present invention relates to a process for improving the adhesion between normally non-adhesive components in a multi-component polymeric fiber by the addition of one or more defined plasticizers to one or more of the components.

Abstract: Melt polycondensation of bis(aminophenyl)sulphone with dicarboxylic acid, especially aliphatic dicarboxylic acid, using as catalyst a specified Group VB compound, or metal salt or complex thereof. Typical catalysts are phosphinates or phosphonates in admixtures with metal salts.

Abstract: Pattern printing apparatus which prints by depositing on a surface to be printed moving relatively to the apparatus successively transverse rows of closely spaced small drops, the apparatus having at least one row of printing guns supplied with printing liquid under pressure to form parallel jets of printing liquid which break up into small drops, charge electrode means for each jet for uniquely charging drops formed in each jet, drop deflection means providing a substantially constant electrostatic field through which the drops formed in the jet path pass, and a drop intercepting device for intercepting drops in each jet which have been charged to a predetermined level, there being further provided signal generating means which make available for application to the charge electrode means a periodic voltage signal the periods of which are of duration sufficient to span the formation of a plurality of drops in each jet path, and, electrical means operative to apply the signal voltage at predetermined voltage l

Abstract: Yarn is simultaneously drawn and false twist crimped at a draw ratio below the standard draw ratio for the yarn when flat drawn, with the false twist passing through the draw necking portion of the yarn.