Abstract: The present invention aims at improving pool cleaners. The improved pool cleaners utilize toroidal vortex technology to provide efficient fluid flow in a sealed system. The sealed system prevents dirt from escaping into surrounding fluid and retains kinetic energy of the flowing fluid. The present invention is also quieter, lighter, and simpler than conventional designs.

Abstract: A chromatography column suitable for small-scale laboratory use as a column tube resembling that of a syringe and a movable plunger which slides in the column tube. End filter arrangements are mounted by direct integration, e.g. melt-bonding of glass, into these components. A tubular stem providing an internal flow conduit to the end filter arrangement at the front end of the plunger is also integrally bonded behind the permeable filter portion. By making all of these operational components out of a formable, melt-bondable material, preferably glass which can also make sliding seals with itself, the resulting chromatography column is simple to use and unlikely to leak by comparison with conventional laboratory columns which use many discrete components.

Abstract: A microchip-based electrospray ionization device and column with affinity adsorbents is disclosed. The invention includes a microchip array and a capillary tube or alone or attached in combination. At least a portion of the device or column has immobilized affinity adsorbents. Methods for using the device are provided as well for affinity capture of biomolecules to meet the needs for the modern life sciences such as proteomics and drug discover.

Abstract: An apparatus is provided for separation of suspended solid particles from fluids, for separation and mixing of fluids, and for dissolving gases in aqueous fluids. The apparatus employs a grooved ring to divide the fluid stream and impart a high velocity on each of the divided or sub-streams. A grooved ring with any number of grooves that may be spiral in shape is used to create a high velocity circular motion on a divided stream for separation of suspended solid particles by centrifugal force in a cyclone filter and for saturation of liquid with gases in a fluid mixer where gases are introduced through a diffuser. A grooved ring with any number of grooves that may be radial is used in a fluid mixer to divide a stream of fluid, produce a high velocity flow through each groove, introduce a second fluid through an orifice into the first fluid flowing through each groove, and direct the fluid mixture to a center impact zone where the various streams collide to complete the mixing.

Abstract: The present invention relates to a point-of-use water treatment system unit (10). The unit (10) includes a filter housing assembly (60) having a filter tank assembly (66) and a closure (64) which utilizes a handle and (152) cammed reciprocating lock blades (146, 150) to secure the closure to the filter tank assembly (66). A UV tank assembly (300) includes a planar baffle (322) and a vaned baffle (324) to induce plug flow about a UV lamp assembly (280). The UV lamp assembly (280) is used which simultaneously electrically and sealingly mounts to UV tank assembly (300) and electrical cap assembly (290) using a bayonet mount. A bi-planar manifold assembly (40) is used to interconnect components of the WTS unit and to provide an envelope for accommodating a water pipe assembly (34). The bi-planar manifold assembly (40) enhances the compactness of the design of the WTS unit (10).

Abstract: A filter for use in a waste water discharge system including a first channel defining a receptacle for a filter and a second channel connected generally orthogonally to the first channel providing an outlet from the filter receptacle. The filter has an axial support of a pre-selected length, a plurality of bristles fixed to the axial support extending radially outward to define an outer margin. The outer margin of the bristles, at some portions along the pre-selected length, are at least equal to an inside dimension of the channel defining the receptacle. A handle is fixed to the axial support facilitating the placement and withdrawal of the filter element in the filter receptacle. A shield member is provided that is generally conformable to the inside surface of the filter receptacle. The shield member has a length dimension sufficient to cover the outlet leading to the second channel for blocking any flow of waste water into the second channel during replacement of the filter element.

Abstract: An electrically energised device for coalescing a first conductive fluid, emulsified in a second fluid, comprising a tube member (1), having at least one fluid inlet (2) and at least one fluid outlet (3), the tube B member (1) defining a flow channel (4) for an emulsion of the first and second fluid from its inlet side to its outlet side and comprising at least one electrically insulating layer portion, the channel B (4) having a generally circular or elliptic cross section, and an interacting pair of a first and a second electrode (5, 6) that are arranged outside and adjacent to the at least one insulating layer portion, that separates the electrodes (5, 6) from the channel (4) and thereby from immediate contact with the emulsion, and supplied with a pulsed or alternating voltage for the purpose of subjecting the first and second fluid flowing through the flow channel to an electrostatic field.

Abstract: A liquid filter for removing contaminants from liquids such as lubricating oil, water or fuel, comprising a filter housing (10), a filter element (15), a support body (16) and a slide valve (17), which, when closed, prevents liquid from flowing from an unfiltered liquid area or from a filtered liquid area to a filter outlet (24). When the filter housing is opened, the slide valve moves axially and opens the filter outlet (24) so that the filter housing can empty. The slide valve (17) is detachably snapped together with the support body (16), which in turn is connected to a housing cover (12). This enables the slide valve to be detached from the support body, and reduces the level of maintenance required by the liquid filter.

Abstract: Multi-layer microfluidic devices incorporating a filter element are provided. A filter element is compressively restrained between device layers, such that the compression promotes a tight seal between device layers and resists fluid leakage around the filter element.

Abstract: The present invention relates to filtration media having both hydrophobic (water-repellent) properties. The filtration media are produced using a fluorothermoplastic material, such as a terpolymer of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene. The invention also relates to methods of preparing such filtration media using casting solution phase inversion.

Abstract: A grit extractor includes inlet and outlet flumes arranged to inject and extract liquid tangentially into a round chamber. The velocity entering and leaving the chamber is controlled by the width of the outlet flume. The velocity is maintained within an optimal region over a ten to one flow range. An effective ten to one variation in flow is achieved with a velocity in the range of 1.5 feet per second to 3.5 feet per second.

Abstract: A method and apparatus for treating fluids includes a vortex nozzle assembly having improved vortex nozzles. The overall system and system layout, which includes an elbow design, are improved as well as vortex system methods. The vortex nozzle assembly includes an access port and methods for measuring physical properties at the fluid flows. A frame assembly provides support for the vortex system.

Abstract: An apparatus is provided for separation of suspended solid particles from fluids, for separation and mixing of fluids, and for dissolving gases in aqueous fluids. The apparatus employs a grooved ring to divide the fluid stream and impart a high velocity on each of the divided or sub-streams. A grooved ring with any number of grooves that may be spiral in shape is used to create a high velocity circular motion on a divided stream for separation of suspended solid particles by centrifugal force in a cyclone filter and for saturation of liquid with gases in a fluid mixer where gases are introduced through a diffuser. A grooved ring with any number of grooves that may be radial is used in a fluid mixer to divide a stream of fluid, produce a high velocity flow through each groove, introduce a second fluid through an orifice into the first fluid flowing through each groove, and direct the fluid mixture to a center impact zone where the various streams collide to complete the mixing.

Abstract: The wastewater treatment systems have a plurality of treatment modules between the inlet and the outlet, each for treating water with a selected process. Influent is directed to a fixed-film reactor. Water then flows to a hydroponic reactor, in which aquatic plants are suspended atop the liquid for achieving aquatic-root-zone treatment. A filtration device removes any remaining suspended solids following the hydroponic reactor. Recycling may occur to the fixed-film reactor to enhance nitrogen removal from one or both of the hydroponic reactor and the filtration device.

Abstract: An apparatus for the fixed-film anaerobic digestion of flushed livestock manure includes an enclosed digester tank (fixed or flexible roof), internal media for biofilm development, a biogas collection and flare system, various pumps, and hydraulic control systems. The preferred media has substantially vertically-oriented, uninterrupted channels to promote enhanced bacterial attachment and biofilm development. The immobilization of microbial biomass within the reactor as a biofilm allows effective treatment of the wastewater at ambient and higher temperatures, as well as reasonable hydraulic retention times. The composition and concentration of bacterial groups in the biofilm developed on the media in the fixed-film digester result in a significantly enhanced anaerobic degradation process. This novel fixed-film digester design expands the potential application of anaerobic digestion to dilute livestock waste with significant levels of suspended solids.

Abstract: The invention relates to a process and installation for treating a polluted aqueous liquid having a COD value caused by organic compounds present therein and a BOD/COD ratio smaller than 0.2. To reduce the COD value, the polluted aqueous liquid is percolated through a packed filter bed (7) of a carrier material, in particular of activated carbon, which is colonised with aerobic bacteria and which forms an adsorbent for at least part of said organic compounds. To provide a thin, fully aerated biofilm of bacteria on the carrier material so that no oxygen has to be dissolved under pressure in the liquid, the filter bed is kept at the most partially submerged in the liquid percolating therethrough.

Abstract: A solid phase mixed solvent polymer, compositions and methods for removing and retaining solvated organic compounds and inorganic ions from water, wastewater, superficial and ground water, soil and other environmental sources, a soil amendment and method resulting from adhesively coating the polymer onto sand along with at least one ion exchange material, and methods for the containment, reduction, and prevention of organic leaching from soils, agricultural, industrial, and commercial environments, and in particular, sports and athletic turf facilities such as golf courses where pesticides are frequently applied.

Abstract: The present disclosure relates to a method for removing anions such as nitrate ion, sulfate ion, chloride ion, and phosphate ion existing in underground water, surface water or waste water. The method involves adding alumina cement and a calcium compound to the water containing the anion followed by applying an electric field thereto, thereby forming a chemical precipitate which is an insoluble complex salt. The disclosure also relates to a continuous process for removing the anion by continuously performing the above method for removing anions.

Abstract: A wastewater treatment system for use on marine vessels or land-based applications treats wastewater by solids separation and oxidation. The system includes a solids separation tank, an oxidation tank having a plurality of chambers and a fluid circuit for re-circulating treated wastewater into the solids separation tank and oxidation tank for further treatment. An ozone generator produces ozone which is dissolved in the treated wastewater in the re-circulating fluid conduit and is used for the solids separation and oxidation processes. The treated wastewater is periodically discharged into the environment.

Abstract: An apparatus and a method for controlling and optimizing the performance of the activated sludge process and the plant or process so controlled by measuring the parameters of most importance over time, i.e., the sludge's settling, compacting, and flocculating characteristics; manipulating said measurements to determine whether changes in them are significant; processing the changes; and taking appropriate control actions.

Abstract: A dialysis machine may include a main control unit provided with a memory that stores the parameters of a dialysis treatment carried out on a patient and a plurality of slave control units interacting with the main control unit. The slave control unit may provide the control of the dialysis treatment carried out on the patient. A functionality checking unit may include a memory that stores dialysis treatment parameters and interacts with the main control unit to carry out checking of the functionality of the dialysis machine. At predetermined intervals of time, the functionality checking unit may send the dialysis treatment parameters stored in its memory to the main control unit, and the main control unit may compare the dialysis treatment parameters stored in its memory with those sent from the functionality checking unit, and generate an alarm signal if the dialysis treatment parameters do not coincide with each other.

Abstract: An adjustable curb guard filter apparatus for filtering liquid flowing into a curbside drain and method for deploying the same. In accordance with one embodiment, the adjustable curb guard filter apparatus includes a filter sheet disposed between an upper and a lower of a pair of support bar members. The curb guard filter apparatus is deployed onto the curbside drain such that the ends of each of the support bar members exert an outwardly directed pressure against the inner lateral surfaces of the curbside drain enabling the filter sheet to form a substantially complete seal thereon. In a preferred embodiment, the lower end of the filter sheet is wrapped in a scroll-like manner around the lower support bar member such that when installed onto the curbside drain, the wrapped lower support bar member simultaneously provides dam and liquid filtration functionality along the bottom edge of the curbside drain.

Abstract: An apparatus is provided for separation of suspended solid particles from fluids, for separation and mixing of fluids, and for dissolving gases in aqueous fluids. The apparatus employs a grooved ring to divide the fluid stream and impart a high velocity on each of the divided or sub-streams. A grooved ring with any number of grooves that may be spiral in shape is used to create a high velocity circular motion on a divided stream for separation of suspended solid particles by centrifugal force in a cyclone filter and for saturation of liquid with gases in a fluid mixer where gases are introduced through a diffuser. A grooved ring with any number of grooves that may be radial is used in a fluid mixer to divide a stream of fluid, produce a high velocity flow through each groove, introduce a second fluid through an orifice into the first fluid flowing through each groove, and direct the fluid mixture to a center impact zone where the various streams collide to complete the mixing.

Abstract: A method and apparatus for controlling water impurity level and temperature uniformity within large water-containing reservoirs including a pump located in the body of water, the pump ejecting a jet of water therefrom and ingesting water at a point remote from said ejecting and an eductor positioned in the jet of water for pulling in low pressure water and flowing a stream of water therefrom providing mixing and circulation of water within the reservoir to remove temperature gradients. Water purity is controlled by a controller.

Abstract: The present invention relates to a method of inhibiting the growth of killing algae, bacteria, yeast and/or fungi in a recirculating water system which comprises adding to the water a polymeric biguanide and an adjuvant of the Formula (1) or a salt thereof: wherein: R1 is an optionally substituted C8 to C12 or C18 to C22 alkyl group; and R2 and R3 each independently is H or optionally substituted C1-4-alkyl.

Abstract: A method and apparatus for treating fluids includes a vortex nozzle assembly having improved vortex nozzles. The overall system and system layout, which includes an elbow design, are improved as well as vortex system methods. The vortex nozzle assembly includes an access port and methods for measuring physical properties at the fluid flows. A frame assembly provides support for the vortex system.

Abstract: An apparatus is provided for separation of suspended solid particles from fluids, for separation and mixing of fluids, and for dissolving gases in aqueous fluids. The apparatus employs a grooved ring to divide the fluid stream and impart a high velocity on each of the divided or sub-streams. A grooved ring with any number of grooves that may be spiral in shape is used to create a high velocity circular motion on a divided stream for separation of suspended solid particles by centrifugal force in a cyclone filter and for saturation of liquid with gases in a fluid mixer where gases are introduced through a diffuser. A grooved ring with any number of grooves that may be radial is used in a fluid mixer to divide a stream of fluid, produce a high velocity flow through each groove, introduce a second fluid through an orifice into the first fluid flowing through each groove, and direct the fluid mixture to a center impact zone where the various streams collide to complete the mixing.

Abstract: A method of manufacturing a micromachined component includes using a first liquid to etch a first layer (140) located underneath a second layer (150), exposing the second layer to a second liquid that is inorganic and miscible in carbon dioxide, and supercritical drying the micromachined component with carbon dioxide.

Abstract: A method for producing an ink jet recording head, comprising steps of forming, on a substrate, a solid layer composed of soluble resin and having a pattern for constituting a liquid flow path; forming an inorganic film by low temperature film formation so as to cover the solid layer; forming a layer of a head forming material so as to cover the inorganic film; removing a part of the inorganic film for forming a discharge port; and removing the solid film thereby forming a liquid flow path communicating with the discharge port.

Abstract: A method for producing hydrophobic polyolefin-containing fibers or filaments, in particular cardable staple fibers, using spin finishes applied after spinning and stretching, that comprise at least one water-insoluble ester of a mono-, di-, tri- or tetrahydric alcohol with a molecular weight not exceeding 500 and a branched or straight chain fatty acid with between 12 and 30 carbon atoms, e.g. a water-insoluble ester of ethylene or propylene glycol, glycerol, neopentyl glycol, trimethylolethane or trimethylolpropane and at least one saturated or unsaturated fatty acid residue having 12-24 carbons atoms, an anionic or nonionic antistatic agent preferably being applied after crimping; fibers produced by the method; and nonwovens produced from such fibers.

Abstract: The subject invention provides a magnetorheological (MR) composition having improved resistance to oxidation and increased dispersability in a carrier fluid. The composition includes a plurality of metal particles and a surfactant including a hydrocarbon with at least one of a hydroxyl, a carbonyl, and an amine group bonded to the hydrocarbon for reacting with the metal particles. The surfactant is present in an amount such that from about 1% to about 20% of the amount of the surfactant is adsorbed to the metal particles. The surfactant is reacted with the metal particles such that about 75% to about 100% of a maximum amount of the surfactant adsorbs to the metal particles for improving the resistance of the metal particles to oxidation and for increasing the dispersability of the magnetorheological composition in the carrier fluid. The MR composition according to the subject invention is utilized in a magnetorheological (MR) fluid.

Abstract: In the method for manufacturing ferrite type permanent magnets according to the formula M1-xRxFe12-yTyO19: a) a mixture of the raw materials PM, PF, PR and PT of elements M, Fe, R and T, respectively, is formed, Fe and M being the main raw materials and R and T being substitute raw materials; b) the mixture is roasted to form a clinker; c) wet grinding of said clinker is carried out; d) the particles are concentrated and compressed in an orientation magnetic field to form an anisotropic, easy to handle green compact of a predetermined shape; and e) the anisotropic green compact D is sintered to obtain a sintered element. The surface are GS and percentage of at least one of the substitute raw materials is selected according to the surface area and percentage of the iron raw material to obtain magnets with high squareness and overall performance index properties.

Abstract: The disclosed invention relates to piezoelectric rare earth doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds including (zPb(ZrwTi(1−w))O3—(1−z)Pb(Mn1/3Sb2/3)O3+REx) where z is ≦0.95, 0.40<w<0.60, and where RE is a rare earth cation dopant, and 0<x<5.0%. The doped compounds have both improved Qm and (k). The RE dopants employed advantageously generate both “hardening” and “softening” effects in doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds. The RE doped Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds have advantageously high vibrational velocity compared to pure Pb(Zr,Ti)O3—Pb(Mn,Sb)O3 compounds and commercialized hard PZT. The disclosed invention also relates to piezoelectric devices which include the doped piezoelectric ceramic compounds.

Abstract: A heat transfer medium is shown, having a very high heat transfer rate that is simple in structure, easy to make, environmentally sound, rapidly conducts heat, and preserves heat in a highly efficient manner. Also shown is a heat transfer surface and a heat transfer element utilizing the heat transfer medium.

Abstract: The present invention provides a composition and a method for reducing the production of persistent bio-accumulative and toxic pollutants in solid carbonaceous reduction reactions in carbochlorination processes.

Abstract: The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula: CH2(OOR1)CH(OOR2)CH2(OOR3) wherein at least two of R1, R2, and R3 are different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of acids in the presence of a catalyst. Preferably, the mixture of acids includes at least two selected from the group consisting of alkyl acids and aryl acids, with each acid in the mixture containing up to about 11 carbon atoms, and more preferably from about 4 to about 9 carbon atoms each. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.

Abstract: An organic sol is disclosed comprising titanium oxide particles; an organic liquid phase and at least am amphiphilic compound selected among polyethylene phosphate alkyl ethers. In a first embodiment, the method for preparing said sol mixes said amphiphilic compound and the organic liquid phase, and disperses the titanium oxide particles in the resulting mixture. In a second embodiment, the method forms a mixture of titanium oxide and at least said amphiphilic compound, then disperses said mixture in said liquid phase. A solid compound comprising a mixture of titanium oxide particles and at least an amphiphilic compound selected among these mentioned above is also disclosed.

Abstract: A composition for an antistat layer comprising: a chlorinated polyolefin; a conductive agent; and a solvent.

Abstract: Described is a compliant and crosslinkable thermal interface material of at least one silicone resin mixture, at least one wetting enhancer and at least one thermally conductive filler, and a method of making and using same; as well as a method of improving thermal conductivity of polymer and resin systems.

Abstract: This application describes ceramic oxide superconductors, their precursors and methods of preparation. The superconductors contain no copper, but comprise the transition metals Nickel or Cobalt (MT) together with bulky cations of Groups 2 and 1 of the Periodic Table (M2+ and M1+) such as Ba2+ and K1+. Their hexagonal crystal structure comprises parallel chains of highly covalent, octahedrally coordinated oxygen around the transition metal, which exhibits its highest valence +4. The octahedra are facet-linked forming polyacid chains or macroanions that run the full length of crystallites or single crystals along the c axis. The chains are separated by distances that prevent covalency or orbital overlap among them. They are held together by coulombic forces from the cations located between them that also run parallel to the c axis. Electrical current, carried by holes, can only flow within the chains.

Abstract: Disclosed is a photochromic plastic ophthalmic lenses having polymer matrices with an effective amount of at least one photochromic agent distributed therein, applied thereto or associated therewith and at least one ophthalmic filtering dye applied thereto, associated therewith or distributed therein the lens. A group of the filter lenses have dominant wavelengthes between 570 and 605 nm and color purity between 50% and 75%. Another lens product of the present invention is particularly suitable for patients suffering from retinitis pigmentosa. The lenses of the present invention are particularly suitable for individuals bothered by strong or variable illumination intensity.

Abstract: An inexpensive multi-layered holographic read-only memory having a large capacity is provided. In the memory in which single-mode slab waveguides are multi-layered, a periodic scattering center whose period approximately agrees with the period of the guided mode is provided in at least one of a core layer and a clad layer in each waveguide so that a guided wave in the waveguide is diffracted by the periodic scattering center to the outside of the waveguide and a holographic image is generated.

Abstract: A process of monolithically forming one-piece reflective pavement marker or delineator, including at least one retro reflective face. The process is based on molding the pavement marker or delineator with means to integrally form cube-corner reflective elements and internal hollow cavity air gaps simultaneously. The pavement marker also provides means to enhance agglutination to the roadway. The open ends of hollow cavities at the marker base can be sealed, thereby maximizing the base area for adhesive wetting parameter. The monolithically formed reflective marker can be made, either from one type of plastic, or from two polymers with varied specifications, said polymer is to be from high impact and abrasion resistance thermoplastics. The integrally formed reflective face provided with means to form cube-corner reflective elements on designated cell like areas within the inside surface of said reflective face. The reflective pavement marker further provided with means to enhance abrasion resistant surface.

Abstract: An injection assembly for an injection moulding machine, comprising a screw (2) mounted in a plasticising cylinder and an injection piston (8) which moves the screw (2) in the longitudinal direction and which is mounted in an injection cylinder, wherein there is provided a supply conduit for the injection cylinder having a control valve (13) which can be shut off and there is provided an additional conduit (14) which by-passes the control valve (13) and in which are arranged a device (17) for reducing the amount of the pressure fluid flowing to the injection cylinder (7) and possibly a device (16) for reducing the pressure.

Abstract: A fire-retardant wood-based composite is formed by treating a green wood furnish with an amount of a phosphate/borate fire retardant treatment effective to increase the fire retardancy of the resulting wood-based composite, compared to the fire retardancy of the corresponding wood-based composite lacking the fire retardant. The fire retardant treated green wood furnish is blended with a binder and then bound, as by pressing the furnish, to form a non-leaching fire-retardant wood based composite. Another aspect of the invention is the product formed according to the preceding process. The fire retardant may also act as a catalyst to cure the binder and thus promote binding. Also, the addition of the fire retardant to green wood chips, without the need to dry them to a low moisture content, is believed to be novel.

Abstract: A method of producing a polymer insulator and an end processing apparatus utilized for the method. The insulator has a core, an overcoat member arranged on the core, and a fitting member for securing the core at its both ends, wherein the core and the fitting member are secured under pressure at both ends of the core by contacting a ring-shaped protrusion portion arranged at both ends of the overcoat member to an open inner end of the fitting member. The method includes the steps of: forming the overcoat member on the core; forming the ring-shaped protrusion portion integrally with the overcoat member by processing an end portion of the overcoat member, and securing the fitting member.

Abstract: A method for forming a plurality of composite parts via resin transfer molding in a single molding cycle. The method includes the steps of using a mold having first and second mold members that cooperate to house a plurality of shims and placing a plurality of preform workpiece into the mold cavity such that at least one of the shims is disposed between each of an adjacent pair of the preform workpieces. A liquid resin is then injected into the mold cavity and subsequently cured to thereby form a cured workpiece matrix that is composed of a plurality of semi-finished composite parts and at least one shim separating the plurality of semi-finished composite parts from one another.

Abstract: Footbeds for footwear, especially sandals, are formed from weldable plastic materials, such as industrial and commercial carpeting, and are provided with patterns welded into the material and with decorative prints or patterns welded to the physical patterns. The footbeds are very decorative in appearance and produce very saleable footwear products. A process for conveniently and economically producing the decorative footbeds is also disclosed.

Abstract: A method for forming tear lines in the rear side of an automobile interior article having a cover portion being developed from which an airbag inflates. When either an automobile interior article body having an integrally molded surface portion or an automobile interior article surface portion is to be molded, the mold is opened after tear line forming projections are moved forward and backward with the mold closed. Thus, the tear lines can be formed at the molding time without any visible extrusion marks of the tear line forming projections on the front surface side (the design face).

Abstract: A method of producing a plastic product having a microstructured surface (3a), utilizing an arrangement for moulding plastic products. Said arrangement has at least two mould parts (2, 3) movable towards and away from each other, a predetermined volume of a viscous polymerizable plastic material (9) being supplied to a cavity formed between the mould parts, after which polymerization of the plastic material occurs. After said polymerization of the plastic material (9′), the mould parts are caused to move apart from each other thereby allowing removal of a finished plastic product the outer shape of which conforms to the shape of the cavity produced by the mould parts. Said viscous polymerizable plastic material (9) is supplied to the cavity (6) around a hole (10a) pertaining to the finished plastic product, and said viscous plastic material is distributed in a direction from said hole (10a) towards the peripheral edge area of the plastic product.