Abstract: Blends of high molecular weight linear polyethylene and low molecular weight linear polyethylene provide improved fiber-forming capabilities over that found with either polymer taken alone. Preferably at least one of the polymers used in the blend is a linear low density polyethylene, LLDPE, which is a linear polyethylene comprising ethylene copolymerized with an amount of a higher alpha-olefin which causes the density of the copolymer to be less than that of a homopolymer made using the same process and catalyst. The higher alpha-olefin can be at least one in the C.sub.3 -C.sub.12 range, preferably in the C.sub.4 -C.sub.8 range.

Abstract: The blade of composite materials and its manufacturing process according to the invention are such that the spar includes at least one bundle (10a, 10b) extending longitudinally in the shell (4), between the fillings of the leading edge (12a) and the trailing edge (12c) and which adheres directly to the laminated pressure face and suction face coverings, (4a, 4b) of the rigid shell (4).Beyond the blade footing (3), the spar is shaped to form a root loop flexible in torsion (8) and passing round an attaching socket (9) on the hub.Application to variable pitch multi-blade propellers for the streamlined tail rotors of helicopters.

Abstract: A method of welding porous tube ends onto a tube sheet is disclosed, wherein tube ends projecting over the tube sheet are fused into a melt. Part of the melt is conducted to the outside in a radial direction, so that it lies on the end face of the tube sheet. Melt and tube sheet are then welded together. The tube end is preferably cooled from the inside by a metal pin is inserted into the tube end.

Abstract: This invention relates to a process for preparing fiber-reinforced thermoplastic (FRTP) molded articles comprising stacking sheet prepregs comprising unidirectionally arranged reinforcing fibers impregnated with thermoplastic resin and molding the same, and to a process for preparing FRTP molded articles by using woven reinforcing fibers in place of unidirectionally arranged reinforcing fibers. The FRTP molded articles obtained by the process of this invention have high quality and can be molded without unevenness in strength.

Abstract: An optical recording medium and a method for manufacturing an optical recording medium from a first substrate having a first surface and a second substrate having a second surface facing the first surface of the first substrate. At least one of the first and second substrates includes an information recording layer. An adhesive material is selectively applied to one of the first and second surfaces. The first surface of the first substrate is then positioned in close facing engagement with the second surface of the second substrate, and the first and second substrates are adhered under predetermined partial vacuum conditions. Preferred materials, adhesives, viscosity of the adhesives, pressures for adhering the substrates, and degree of vacuum are disclosed.

Abstract: A self propelled enclosed apparatus for coupling sections of plastic pipe by fusion together to form a pipeline. The apparatus comprises a housing having a forwardly extending boom or trough for receiving pipe sections. Pipe sections are loaded onto the boom and fed to a fusion machine in the housing. The fusion machine is provided with hydraulically operated clamps and rollers to align and hold a section of pipe in mating relationship with a pipeline and a heating plate for forming a fused joint between the pipe section and the pipeline. Cooling apparatus is provided at the joint to reduce its temperature following fusion. Kick out rollers are provided, and the fused together pipeline exits the apparatus to a trailer towed thereby to be laid on the earth's surface or in trench. The trailer, self propelled apparatus, and boom are equipped with pipe support members to provide strain relief on the joint during fusion.

Abstract: Apparatus is provided for introducing and joining diaphragms in slotted walls. The slotted inner connecting pipe of one diaphragm is introduced into the slotted outer connecting pipe of another diaphragm. Furthermore apparatus for fusing together the two connecting pipes is placed within the interior of the inner pipe and can move through the latter. The apparatus has a heating device for heating and fusing the two connecting pipes together.

Abstract: An apparatus for manufacture of a pneumatic tire in which an annular component, such as a tread/breaker assembly, is accurately located in a supporting box (30)(15). Other tire components such as sidewalls, and carcass, are assembled to said annular component while it is held in the box. The box (15) (30) is a transfer box which is detachable from a rotatable conveyor (11) for relocation in turn at each of a number of tire building stations (16)(26)(36) to pick a respective component(s) at each station. After picking up the respective component(s) at a station the box (15)(30) returns to the conveyor (11) for movement of the box to the next building station.

Abstract: The described device includes a bearing element positioned to engage a bead core and subjected to the action of a friction wheel acting in such a way as to make the bead core rotate around its own axis. Two pressure discs arranged specularly with respect to the lying median plane of the bead core act on opposite sides of a filler to apply the same on the outer peripheral chafer of the bead core while this latter is rotating. The pressure discs lie according to respective planes convergent toward the bead core and divergent in the sense of rotation of the bead core to favor the release of the filler from the pressure discs. The pressure discs are thrust on the filler through a pneumatic cylinder which exerts a constant force on an oscillating support according to an axis parallel to the bead core axis and bearing the discs themselves.

Abstract: Improved apparatus for dispensing tape of a thermoplastic matrix composite material onto a recipient surface comprising in combination support means for mounting a reel of tape; feed means for unwinding the tape from the reel and advancing it along a path of travel to the mandrel; a guillotine knife in the path of travel for cutting the tape at a predetermined angle with respect to the path of travel; a slotted, box-type pre-heater for the tape located in the path of travel following the knife for providing heat to the tape; a heated pressure roller located in the path of travel following the pre-heater for providing additional heat to the tape for effecting a process operating temperature and for applying the required pressure to the tape for lamination of the tape onto the recipient surface; cooling means located in the path of travel beyond the pressure roller for reducing the process heat from the laminated tape on the recipient surface and to smoothing it for thereby obtain the desired surface finish; an

Abstract: A portable device for guiding a length of pressure sensitive adhesive coated tape partially onto the outer wrap of a roll of masking material adjacent one of its edges to provide a composite masking sheet for use in masking surfaces comprising a length of the sheet material having the tape adhered along and extending widthwise past one edge by which the composite masking sheet can be adhered to a surface. The outer edge of the tape is not guided by the device, and a tendency that otherwise exists for the tape being adhered along the edge portion of the roll of masking material to move transversely away from the masking material so that less and less of the tape is adhered to the masking material is restricted by a tracking member mounted on a frame of the device between a hub supporting a roll of the tape and the roll of masking material.

Abstract: Apparatus for aligning an elongate web with respect to a predetermined path of travel. The web is supplied from a supply roll formed by the web being wound around an inner web layer and having an outer web layer. The apparatus includes a frame, and an axle assembly on the frame adapted to hold the supply roll for rotation about an axis to afford unwinding of the web from the supply roll, and adapted for axial movement of the supply roll. An alignment device is provided comprising web-guiding rollers mounted on the frame and generally rigid in the direction parallel to the axis of the rotatable-holding means. The web-guiding rollers guide the opposite edges of the outer web layer of the web laterally with respect to the longitudinal direction of the web, with the axle assembly affording translation of the supply roll to accommodate telescoped or non-uniformly wound supply rolls, thereby to maintain alignment of the outer web layer with respect to the predetermined path of travel.

Abstract: A process for the preparation of a single crystal of a biopolymer by growth from a solution, which comprises continuously changing one factor having an influence on the conditions for crystallization of a solution of a biopolymer, fractionating the solution, and independently crystallizing the resultant fractions. The process may be carried out by an apparatus comprising a means for feeding a crystallizing agent solution, a means for feeding a bioploymer solution, a means for producing a series of changes of predetermined crystallization conditions, said means continuously changing at least one factor having an influence on the conditions for crystallization of the biopolymer solution, and a means for fractionating the solution and independently crystallizing the resultant fractions.

Abstract: The invention relates to a process for the preparation of berlinite crystals AlPO.sub.4, with a high Q factor, from seeds or crystalline flakes of AlPO.sub.4, by a hydrothermal method. It is characterized in that the crystallization solution is a sulfuric solution of AlPO.sub.4. The invention also relates to the berlinite monocrystals obtained by this process.

Abstract: A method of testing the quality of a conductor film laminated onto a surface of a substrate, is carried out by the steps of mounting a testing stand having a T-shaped cross section on the surface of the substrate, the testing stand being provided with an undercut portion around the entire side periphery thereof, laminating a conductor film having a predetermined thickness on the surface of the substrate, and forming on the top surface of the testing stand a wiring pattern formed with a conductor film insulated from the first mentioned conductor film laminated onto the substrate. An electric current is then applied to the wiring pattern. A characteristic test of the conductor film can therefore be performed immediately after the laminating of the conductor film to significantly reduce the testing time.

Abstract: A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized to produce signals representative of the actual Kappa Number and the residual acid concentration in the digester. The expected perturbations in Kappa Number and the residue chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same.

Abstract: Coking system, wherein the coking blends particularly based on hard coal, are fed batchwise to a reactor (1), which is heated indirectly by heat recovery in regenerators (I, II) or recuperators, whereby the reactor is built as a high-capacity coking reactor (100), several high-capacity coking reactors are combined to form a reactor block and the high-capacity coking reactors are built as mutually independent modules, whereby each module can be operated or optionally replaced independently of the neighboring modules, with little or no impairment of the operation of the neighboring modules. The individual reactors are independently operatable in terms of statics and heat supply. The regenerators, or recuperators (I, II, R, R') can be arranged laterally or underneath the reactor chamber. Neighboring reactors can have a common intermediate wall (2). The reactor chambers have a width of at least 0.7 m, a height of at least 8.5 m and a length of at least 18 m.

Abstract: A coke over door jamb cleaner utilizing a unique supporting arrangement, scraper-type cleaning elements and a floor or hearth cleaning tool for effectively cleaning the sealing surfaces of a coke oven door jamb and the floor or hearth of the coke oven adjacent the door.

Abstract: The invention relates to a new process for the purification, by distillation, of thermolabile compounds wherein a thermolabile compound is introduced into a twin screw extruder which is heated, in at least one zone, to the boiling temperature of the compound. The volatilized compound is drawn off and condensed.

Abstract: In electrolytic coating of one side of a moving metal strip, the strip as cathode is in contact with a rotating roller and an insoluble anode is concentric with the roller at a distance from the strip so that a slot is formed in which the electrolytic coating takes place. The electrolyte flows through the slot at a sufficient average velocity that turbulent flow occurs and is fed from a nozzle into the slot with a tangential component opposite to the direction of travel of the strip at the end of the slot at which the strip axis. The conformation of the nozzle is substantially uniform across the whole width of the strip and the electrolyte is fed into the slot at a velocity that nowhere varies more than 10% from the said average velocity of the electrolyte.

Abstract: An acid copper plating bath and process for using with electropositive metals such as aluminum and tungsten is described, wherein the bath contains sulfuric acid, copper sulfate, in solution with urea as a levelling agent, a cationic surfactant as a wetting agent and an ester of a sulfonic acid, Beta-phenylethyltosylate as a brightening agent.

Abstract: A method of manufacturing a high magnetic flux density quaternary alloy electrodeposited thin film, comprising the steps of: forming an FeCoNiCr or an FeCoNiCu quaternary alloy thin film on a cathode by using an electrodepositing electrolyte bath to which four types of ions of Fe, Co, Ni and Cr or Cu have been supplied through sulfate and/or hydrochloride, each of which contains bivalent or tervalent Fe, Co, Ni, Cr and Cu ions, by using a bath having on the basis of the density of [Ni.sup.2+ ] ion such compositions as 0.02<[Co.sup.2+ ]/[Ni.sup.2+ ]<0.9, 0.095<[Fe.sup.2+ ]/[Ni.sup.2+ ]<0.4 and 0.075<[Cr.sup.3+ ]/[Ni.sup.2+ ]<0.4, or 0.001<[Cu.sup.2+ ]/[Ni.sup.2+ ]<0.03; and arranging electrodeposition current density J to be in a range of J<60 (mA/cm.sup.2) at the cathode.

Abstract: A bath for electrodeposition of nickel onto a steel wire substrate from a nickel fluoborate solution. The bath is pumped to a substantial pressure in a specialized high speed, high current density continuous wire plating cell. The bath has a high concentration of nickel ions and a low pH and is operated at very high current densities and elevated temperatures to achieve a good quality nickel plate deposition at a rate far exceeding that of prior art baths. The invention particularly applies to the plating of nickel onto steel wire at current densities of up to 14,500 amps per square foot.

Abstract: Hydroxycarboxylic esters of the general formula ##STR1## where n is an integer from 0 to 10, R.sup.1 and R.sup.2 are each hydrogen, hydroxyl, alkoxy or an aliphatic or olefinic, straight-chain, branched or cyclic hydrocarbon radical, and R.sup.1 and R.sup.2 together may furthermore form an alkylene radical, and the hydrocarbon radicals may furthermore be substituted by halogen, hydroxyl, epoxy or nitrile, and R.sup.3 is a low molecular weight alkyl radical, are prepared by electrochemical oxidation of a hydroxyaldehyde of the general formula ##STR2## in the presence of an alcohol of the formula R.sup.3 OH and of an ionic bromide or chloride in an undivided electrolysis cell.

Abstract: A fluorinated cation exchange membrane made using reinforcement of oriented, hydrolyzed fabric of a cation exchange copolymer, the fabric having a coating of a melt-processible precursor or derivative of a fluorinated cation exchange resin on at least one surface or throughout.

Abstract: The high density RF plasma generator of this invention uses special antenna configurations (15) to launch RF waves at low frequency such as 13.56 MHz along a magnetic field supplied by an external magnetic field generator (16.17) in a discharge space (14) where the working gas is introduced and which is used alone or in conjunction with a process chamber (18) where specimen substrates (20) are located to either deposit or etch films from a substrate or to sputter deposit films to a substrate. The plasma etching, deposition and/or sputtering system comprises the high density RF plasma generator, the external magnetic field, the gas injection and control system, the antenna system (15) and associated power supplies (48), the process chamber (18), and the means to couple plasma from the generator to substrates or targets, including magnetic means (36) to enhance plasma uniformity at the substrates (20) or targets (92).

Abstract: A membrane stack unit for performing a multichamber treatment of plural component fluids, composed of a plurality of sealing frames, membranes interposed between the frames, and two end plates with integrated electrodes disposed at respective opposite ends of the unit with the frames and membranes interposed therebetween. Each frame has four side edges enclosing a region constituting a treatment chamber, with one pair of opposed side edges being provided with a set of through bores for conducting fluid, a set of second bores, and inlet and discharge channels each communicating with a respective second bore and with the chamber, and the second pair of opposed side edges being provided with through bores for conducting fluid. Each membrane is provided with openings aligned with all of the bores. The sealing frames are oriented relative to one another such that at least some of the through bores in one frame are aligned with respective ones of the second bores of another frame.

Abstract: Methods of preventing corrosion in which current flows between the to-be-protected substrate and a distributed electrode whose electrochemically active surface is provided by an element which is composed of a conductive polymer and which is at least 500 microns thick. In one embodiment, the electrode is a flexible strip comprising a highly conductive core. e.g. of copper, and a conductive polymer element surrounding the core. In another embodiment, the electrode is a conductive polymer layer which conforms to the surface of the substrate but is separated from it by a layer of insulation.

Abstract: The photooxidation of N,N'-substituted thioureas with oxygen in the presence of an acid-trapping agent gives N,N'-substituted carbodiimides. The carbodiimides can be converted into cyanoguanidines, which are suitable as latent curing agents for epoxy resins.

Abstract: A method for retarding non-corrosive mineral build-up and plugging in check valves utilized with downhole reciprocating rod pumps, comprising ion implanting or ion plating the interior facing metal surfaces of the check valve with a nonferrous metal or metal oxide.

Abstract: Process for coating transparent substrates, for example float glass, with a transparent dielectric layer having a low refractive index (n<1.7) at a high layer growth rate (>6.0A cm.sup.2 /W sec) by means of reactive direct current cathode sputtering. A vacuum chamber includes a cathode 5 which is provided on one of its surfaces with the material (target) to be sputtered and deposited on the substrate 3. The material to be sputtered (target) is a silicide, preferably nickel disilicide (NiSi.sub.2), and the layer deposited on the substrate is the corresponding oxide, for example NiSi-oxide. The reactive gas introduced into the vacuum chamber is oxygen and the process gas is a noble gas.

Abstract: An oxygen sensor having a body formed of a solid electrolyte material on which electrodes are provided, and a diffusion chamber formed on one side of the body. The diffusion chamber is connected to the space in which the gas to be detected exists, i.e., the interior of the intake or exhaust pipe of an internal combustion engine. A plate is mounted on the body in which a pin-hole is formed for controlling the speed of diffusion of oxygen ions so that the concentration of oxygen ions in the diffusion chamber is equal to that in the detection space. A pore of pores is provided in a plate member forming the diffusion chamber, to enable a rapid equalization of the pressures of the detection space and diffusion chamber while maintaining a control of the diffusion of oxygen ions via the pin-hole.

Abstract: A solid state, thin film moisture sensing element is disclosed. The sensing element is fabricated by thin film deposition of at least a pair of two layer electrodes on an insulating surface. The active surface of the element is then coated with a layer of hygroscopic material and placed in a diffusion limiting housing to complete the sensing element assembly.

Abstract: Commercially valuable oil is recovered from refinery-produced, Resource Conservation and Recovery Act classified, hazardous waste oil sludges by a series of volatilizing and condensing steps (which may vary depending on the oil, water, and solids content of the sludge) resulting in the production of nonhazardous water and solid waste byproducts. A pumpable, low viscosity, high oil- and/or water-content sludge is first centrifuged to separate free oil and water, while the thick waste oil sludge, centrifuge solids, or other sludges low in oil and/or water content are heated to volatilize the contained water and oil. Dry, friable, deoiled solids are recycled with the oily sludge feed to prevent material agglomeration and heat exchanger fouling. Oil and water vapor from the high-temperature volatilization apparatus is recycled as an indirect heat source to the low-temperature volatilization apparatus.

Abstract: A substantially non-carcinogenic light lubricant and a process for its production. The process comprises the step of blending an effective amount of a substantially non-tumorigenic vacuum distilled hydrocarbon oil of luricating viscosity with a tumorigenic atmospheric distilled light hydrocarbon oil, the tumorigenic light hydrocarbon oil having an initial boiling point of at least 250.degree. F., wherein the resultant blend is substantially non-carcinogenic and of lubricating viscosity.

Abstract: High octane gasoline and high quality distillate are co-produced by a hydrocracking light cycle oil from a catalytic cracking process under conditions of low to moderate hydrogen pressure and severity to produce a high octane, hydrocracked gasoline. The distillate fraction from the hydrocracker is separated to form a first fraction which boils immediately above the gasoline fraction and a second, higher boiling fraction which is withdrawn as product. The first distillate fraction is recycled, preferably to extinction, to the cracker to increase the paraffinic content of the higher boiling distillate product by removal of the hydroaromatic components in the recycled fraction. The recycled fraction may be mixed with fresh feed to the cracker or may be injected at a higher level in the cracking riser as a secondary feed injection. The paraffinic distillate product has a low sulfur content and a high cetane index and is useful as a road diesel fuel.

Abstract: Hydrocarbons containing vanadium are converted to lower boiling fractions employing a zeolitic cracking catalyst containing a significant concentration of a vanadium passivator.

Abstract: A hydrotreating process is provided with at least one deflector to minimize catalyst agglomeration and buildup. Preferably, the deflectors comprise an inner annular baffle and an outer annular baffle.

Abstract: An enhanced process to reduce the sulfur content in petroleum distillate products through fractionation of a feedstock followed by segregated hydrotreating. Improved performance and more controlled desulfurization is achieved.

Abstract: This invention provides a layered catalyst system for hydro-denitrification of hydrocarbons, such as vacuum gas oil, used for hydrocracking to produce various fuels. The layered catalyst system of this invention comprises a first layer of a nickel-molybdenum-phosphorus/alumina catalyst or a cobalt-molybdenum-phosphorus/alumina catalyst and a second layer catalyst comprising a nickel-tungsten/silica-alumina-zeolite or a nickel-molybdenum/silica-alumina-zeolite catalyst. The preferred aspects of the combination of the layered catalysts disclosed herein are: (a) the first layer alumina catalyst has a molybdenum content greater than about 14% by wt.; (b) the first layer alumina catalyst has a relatively large pore size, such as at least about 60 .ANG.; and (c) the second layer catalyst contains at least about 2% of a zeolite component. The layered catalyst system of this invention and the attendant process produces improved denitrification of feedstocks, improved catalyst life and other advantages.

Abstract: Processes and apparatuses are provided for hygienically returning for reuse in subsequent manufacturing processes, the original liquid absorbing materials and moisture sealing materials of used single use collecting and/or absorbing products, previously worn by infants or adults to absorb urine and/or to collect feces. These human wastes are washed out from single use diapers, one use adult diapers, and other like purpose products, and directed into municipal sewer systems, or other systems ending in the treatment of sewage. These used single use collecting and/or absorbing products are heated to reach temperatures high enough to liquidize adhesives originally used, where necessary, to hold together the original liquid absorbing materials and moisture sealing materials, and then the liquidized adhesives are drained clear of these materials. Preferably, this removal of adhesives is completed during the washing of these one use products.

Abstract: A sequence controller system for regenerating a plurality of water treatment units in a water treatment plant. Each of the water treatment units has a timer and a multi-port valve for sequencing each of the water treatments units through successively repeating cycles of service and regeneration. The sequence controller system has a priority specifying means for setting the time intervals by which only one of each water treatment unit that is ready for regeneration, at the same time, is permitted to begin its regeneration cycle. The sequence controller system also has a common interlock connection between all of the water treatment units to lockout all of the water treatment units from beginning their regeneration cycles except for the water treatment unit that has been priority specified by having the lower set time interval before beginning its regeneration cycle.

Abstract: The present invention relates to a separator for two liquids which are not miscible, consisting of a cylindrical casing (1) in which there are active capacities (9, 10) and passive capacities (8, 35), the passive capacities (8, 35) being disposed at each of the ends of the direction of circulation (FF) of the liquid in the cylinder and serving either as a tranquilizing zone or as a decantation zone or as a buffer zone, at least two active capacities (9, 10) being connected by a common skimmer disposed in the center of the cylindrical casing (1), the active capacities (9, 10) being disposed between the passive capacities (8, 35) and being provided with a rotor-stator assembly (13, 14) adapted to carry out separation by induced air.

Abstract: A liquid filter as disclosed which includes a housing in which a filtering media is disposed. A relief valve permits the liquid filtrate to bypass the media when the pressure differential across the media exceeds a predetermined level. The relief valve includes a valve member consisting of a valve disc from which four legs extend. The valve closure spring engages the legs to maintain the valve closed until the pressure differential attains a predetermined level. The legs are designed so that only two of the legs engage the spring during normal operation of the valve. Accordingly, the other two legs remain unstressed by the valve spring, but can engage the edge of the valve aperture in case of failure of one or both of the other legs to prevent the valve member from falling into the liquid filtrate, thus blocking the flow of liquid filtrate to the engine, causing catastrophic failure of the engine.

Abstract: A water filter cartridge includes a reverse osmosis membrane permeator spirally wound on a central winding tube and surrounded by an impermeable barrier layer which is, in turn, surrounded by a spirally wound prefilter. A post-filter is placed centrally within the winding tube. The cartridge is designed for functional installation in a housing tube fastened and sealed to a valve plate at a first end and closed by a removable end cap at the other, second end. Feed water enters the cartridge through an inlet port in the valve plate at the first end at an outer radius to pass lengthwise in prefilter. Prefiltered water returns from the second end lengthwise through the reverse osmosis permeator to a waste-water outlet port in the valve plate at an intermediate radius. Product water which has permeated through the membrane flows inwardly through holes in the winding tube and into a clearance space surrounding the central post-filter.

Abstract: An apparatus for the desludging of baths includes a separation part with an oblique sieve filter containing a plurality of essentially horizontal slots. A side of the slots over which soiled liquid runs is covered by a filter cloth placed on the sieve plate and consisting of a polyester monofilament filter fabric with a mesh width smaller than the width of the slots between the sieve rods of the oblique sieve. The combination of the filter fabric of the filter cloth and the slots of the oblique sieve yields in spite of the filtering of small solid particles, a high liquid throughput.

Abstract: There is disclosed herein an apparatus and method for performing liquid chromatography analysis with a stable baseline. The apparatus utilizes positive displacement means on each of two flow paths and a control system to regulate the flow such that the flow in both flow paths is identical. Only one flow path has sample injected therein. Each flow path is passed through a separate liquid chromatography column and a common detector at the output end of each column. Since one flow path contains solvent only and the other flow path contains both solvent and sample, any changes in the characteristics of the output streams of the liquid chromatography columns caused by changes in the solvent composition itself have a common mode. Therefore, only the difference signal is output from the detector which indicates changes in the characteristics of the output stream of the sample flow path caused solely by the presence of the sample components.

Abstract: Resilient sealing rings are disclosed including an annular ring of resilient material having a cross-sectional configuration so that when not compressed the cross section of the sealing ring extends substantially longitudinally and when compressed between two parallel sealing surfaces the sealing ring bends so that the longitudinal ends approach each other. This provides acceptable compression force between the parallel sealing surfaces over an extended range of deformation particularly as compared to conventional O-rings.

Abstract: The invention provides a novel thin film composite or coated membrane suitable for reverse osmosis, ultrafiltration and microfiltration applications, and having a porous polymeric substrate with one or more microporous layers to which a thin film or coating comprising a sulfonated polyarylether is attached substantively to provide an oxidatively stable, thin hydrophilic film or coating layer, and a method for manufacturing and using the same.

Abstract: The present invention relates to a sample filtration device of the type employing differential pressure. An outer container filled with a sample to be filtered slidably receives a hollow plunger having filter media disposed near one end and sealing means disposed in an annular groove about the periphery of the plunger. The annular groove of the plunger is formed by two components: an annular shoulder on a collector portion and the axial face of an annular ring formed in a retainer portion. The two portions are frictionally engaged to retain the filter in place and form the annular groove for the sealing means. This construction permits straight-pull molding of the component parts which eliminates mold mismatch flaws.