Abstract: Systems and methods of indicating to a line worker when there is a defective zipper profile extruded onto a generally flat plastic web while moving in a feed direction in a re-sealable container production line. The system includes a sensor for detecting the defective zipper profile and a web distortion device that actuates in response to the sensor detecting the defect. The web distortion device keeps the web bunched together while it spools onto a roll support device located downstream thereby making it readily apparent to a line worker that the bunched segment contains the defective segment.

Abstract: Systems and methods of indicating to a line worker when there is a defective zipper profile extruded onto a generally flat plastic web while moving in a feed direction in a re-sealable container production line. The system includes a sensor for detecting the defective zipper profile and a web distortion device that actuates in response to the sensor detecting the defect. The web distortion device keeps the web bunched together while it spools onto a roll support device located downstream thereby making it readily apparent to a line worker that the bunched segment contains the defective segment.

Abstract: A system and method for extruding film with a thickened profile section. In some embodiments, the film forms bags with integral zipper profiles. Plastic film is extruded to form a tube. During extrusion, cooling jets direct cooling gases toward the thickened profile section below the frost line to preferentially cool the thickened profile sections. In some embodiments, warm air is drawn out of the tube interior through hot air intakes located below the frost line. In certain embodiments, the film is extruded at a higher rate of speed than conventional processes. Likewise, the extruded film tube is expanded at a lower blow up ratio than conventional processes in certain preferred embodiments. In some embodiments, the extrusion system includes an air flow surface oriented relative to the film tube to define an air flow gap of substantially uniform thickness.

Abstract: A system and method for extruding film with a thickened profile section. In some embodiments, the film forms bags with integral zipper profiles. Plastic film is extruded to form a tube. During extrusion, cooling jets direct cooling gases toward the thickened profile section below the frost line to preferentially cool the thickened profile sections. In some embodiments, warm air is drawn out of the tube interior through hot air intakes located below the frost line. In certain embodiments, the film is extruded at a higher rate of speed than conventional processes. Likewise, the extruded film tube is expanded at a lower blow up ratio than conventional processes in certain preferred embodiments. In some embodiments, the extrusion system includes an air flow surface oriented relative to the film tube to define an air flow gap of substantially uniform thickness.

Abstract: Compositions of a mixture of a thiol material and a material that contains a reactive unsaturated carbon-carbon bond that can be polymerized to form a charge-transporting or luminescent film are described, as is an organic light-emitting diode (OLED) device comprising at least one such charge-transporting or emissive layer that has been formed by polymerizing a thiol material and an ene material. The process for forming such an OLED, including the deposition of a layer of material comprising the polymerizable composition, from solution, exposing said layer to actinic radiation through a mask, and then optionally developing said film to form a photopatterned film, is also disclosed.

Abstract: A detector apparatus and method for detecting radiation emitted from a target comprising: a first transmissive polarizer (302) for polarizing radiation incident on the target; a second transmissive polarizer (304) for polarizing the radiation emitted from the target (303) and absorbing any remaining light polarized by the first polarizer; and at least one reflective polarizer (306) arranged between the first and second transmissive polarizers.

Abstract: Device and detection system comprising two polarising elements and a measuring zone located between said polarising elements, wherein the measuring zone is being bounded on one side by the first polarising element. The device further comprises an inlet reservoir, an outlet reservoir and a flow channel. Method of fabricating said device, comprising the step of depositing an antibody into the measuring zone.

Abstract: Compositions of a mixture of a thiol material and a material that contains a reactive unsaturated carbon-carbon bond that can be polymerised to form a charge-transporting or luminescent film are described, as is an organic light-emitting diode (OLED) device comprising at least one such charge-transporting or emissive layer that has been formed by polymerising a thiol material and an ene material. The process for forming such an OLED, including the deposition of a layer of material comprising the polymerisable composition, from solution, exposing said layer to actinic radiation through a mask, and then optionally developing said film to form a photopatterned film, is also disclosed.

Abstract: Compositions of a mixture of a thiol material and a material that contains a reactive unsaturated carbon-carbon bond that can be polymerised to form a charge-transporting or luminescent film are described, as is an organic light-emitting diode (OLED) device comprising at least one such charge-transporting or emissive layer that has been formed by polymerising a thiol material and an ene material. The process for forming such an OLED, including the deposition of a layer of material comprising the polymerisable composition, from solution, exposing said layer to actinic radiation through a mask, and then optionally developing said film to form a photopatterned film, is also disclosed.

Abstract: A detector apparatus and method for detecting radiation emitted from a target comprising: a first transmissive polariser (302) for polarising radiation incident on the target; a second transmissive polariser (304) for polarising the radiation emitted from the target (303) and absorbing any remaining light polarised by the first polariser; and at least one reflective polariser (306) arranged between the first and second transmissive polarisers.

Abstract: A photovoltaic device comprising a first electrode, a second electrode, an active layer between the two electrodes and an interlayer between the active layer and at least one of the electrodes. The interlayer is formed from a non-conducting material and has a thickness such that charge carriers can tunnel through. The device shows significantly improved voltage-current characteristics compared to prior art devices and is particularly suitable as a low light level detector.

Abstract: Compositions of a mixture of (A) a polymerizable compound, which undergoes polymerization on exposure to heat or to actinic radiation, having the general formula wherein Q is an organic charge transporting fragment, L is a linker group, X is a group capable of undergoing free radical or anionic polymerization on exposure to heat or actinic radiation, m is 0 or 1, and n is an integer having a value of 2 or more; and (B) a phosphorescent material are described, as is an organic light-emitting diode (OLED) device comprising at least one emissive layer that has been formed by polymerizing such a composition. A method for forming an OLED, including depositing a layer containing the polymerizable composition from solution and exposing the layer to heat or actinic radiation to induce polymerization, is also disclosed.

Abstract: Compositions of a mixture of (A) a polymerisable compound, which undergoes polymerisation on exposure to heat or to actinic radiation, having the general formula wherein Q is an organic charge transporting fragment, L is a linker group, X is a group capable of undergoing free radical or anionic polymerisation on exposure to heat or actinic radiation, m is 0 or 1, and n is an integer having a value of 2 or more; and (B) a phosphorescent material are described, as is an organic light-emitting diode (OLED) device comprising at least one emissive layer that has been formed by polymerising such a composition. A method for forming an OLED, including depositing a layer containing the polymerisable composition from solution and exposing the layer to heat or actinic radiation to induce polymerisation, is also disclosed.

Abstract: Compositions of a mixture of a thiol material and a material that contains a reactive unsaturated carbon-carbon bond that can be polymerised to form a charge-transporting or luminescent film are described, as is an organic light-emitting diode (OLED) device comprising at least one such charge-transporting or emissive layer that has been formed by polymerising a thiol material and an ene material. The process for forming such an OLED, including the deposition of a layer of material comprising the polymerisable composition, from solution, exposing said layer to actinic radiation through a mask, and then optionally developing said film to form a photopatterned film, is also disclosed.

Abstract: A method of providing a layer including a metal or silicon or germanium and oxygen on a surface, the method including the steps of forming an adsorbed layer less than 12 monolayers thick on the surface by exposing it to a liquid or vapor containing metal-, silicon-, or germanium-containing organic molecules, and treating this layer by exposure to a glow discharge in an oxygen containing gas, thereby converting the adsorbed layer to a layer including silicon (or germanium) and oxygen.

Abstract: Photoluminescent compounds are described having no-ligand. These have formula (I) in which Ln represents a lanthanide ion, each of X, Y, and Z, which may be the same or different, represents hydrogne, an optionally substituted aromatic group or an optionally substituted aliphatic or cycloaliphatic group, such that at least one of X, Y and Z represents a said aromatic group which is conjugated with the pyrazolone ring system and such that when X or Y represents a said group, said group can optionally be attached via a hetero atom. These compounds possess useful electroluminescent properties such that they can be used in electroluminescent devices.

Abstract: A display arrangement comprises an image intensifier tube or some other device which provides a representation of a viewed scene at an input. A supertwist LCD and associated polarizers and are located between the input and a viewer. A ferroelectric liquid crystal shutter is located between the LCD and second polarizer and is controlled to produce symbology. By switching the shutter the polarization of the incident radiation is switched between two states differing by 90.degree.. This causes the LCD to operate in two states. In one state the viewed scene is transmitted through the LCD and in the other state it is absorbed and any symbology on the LCD is contrasted with a dark absorbing background. The shutter is switched sufficiently quickly that the viewer perceives the symbology overlaid on the viewed scene. In another arrangement, lens means having focusing properties which are dependent on the incident polarization is included to allow switching between different display modes.

Abstract: In a method of driving a ferroelectric liquid crystal display, a blanking pulse of width 2t.sub.s followed, after a delay of n.multidot.t.sub.s (where n is an integer), by a writing pulse of width t.sub.s and of opposite polarity to the blanking pulse are applied to successive row address lines at intervals of 2t.sub.s. Pairs of bipolar data pulses of width t.sub.s are applied to column address lines so that the data pulses coincide with the blanking pulse applied to the ith row and the writing pulse applied to row i-(n+1)/2 for odd values of n and to row 1-(n+2)/2 for even values of n. The data pulse amplitude may be varied in order to obtain variable grey levels in the display.

Abstract: In a method of driving liquid crystal cells in an active matrix addressed display of the resistively-coupled transistor type whereby interlacing of alternate rows of pixels is achieved, rows N-1, N+1, N+3, - - - of the cells are addressed in sequence in a first field period by applying transistor turn-on pulses to the associated row address lines while reference signals are applied to the row address lines associated with rows, N, N+2, N+4, - - - in sequence, the turn-on pulse for the row N-1 and the reference signal for the row N being coincident. During a second field period of the transistor turn-on pulses are applied to the address lines for rows N, N+2, N+4, - - - while reference signals are applied to the address lines for rows N-1, N+3, N+5, - - - the turn-on pulse for the row N and the reference signal for the row N+1 being coincident. The reference signal may be of two different magnitudes which alternate at the line rate or at the frame rate of a television video signal.

Abstract: A device for indicating whether a rise in temperature above a predetermined value has occurred includes a support member, such as a label, on which a temperature-sensitive material is deposited. The material includes a large number of fracturable microcapsules containing a medium which changes from a solid state to a liquid state at the predetermined temperature value. The viscosity of the medium in its liquid state and the material of the support member are chosen such that the distance d.sub.1 by which the medium flows across the support member after the fracturing of the microcapsules so as to activate the device is indicative of the time between activation of the device and cooling of the device to below the predetermined temperature value. If the temperature is subsequently allowed to rise above the predetermined value, the medium will again assume its liquid state and will flow further across the support member, reaching a distance of, say, d.sub.