Abstract: An apparatus for molding plastic preforms into plastic containers, includes a clean room, at least one blow station having a blow mold for shaping the plastic preforms by at least one process pressure, and a venting device for venting or reducing the process pressure into the atmosphere. The venting device has at least one venting valve through which pressure can be vented into the atmosphere via a sound absorber, and a pressure drop safety device for closing the venting valve before the atmospheric pressure level on the venting device is reached.

Abstract: A template for creating designs upon a surface. The template has apertures that are so positioned and shaped as to create the desired design upon the surface after such apertures have been filled with mud and the template has been removed. The template is a substantially planar structure which has a thickness equal to the desired depth for the desired three-dimensional design and adequate length and width to accommodate the length and width of the desired design and which is substantially impervious to the mud. Optionally, the template the template is permanently shaped so that when the template has been placed in position for the creation of the design, no gap will exist between the template and the surface upon which the design is to be placed. One or more edges of the template may be shaped to accommodate the shape of a structure which is on or rises from the surface on which the design is to be applied and which is adjacent to the location where the design is to be placed.

Abstract: An embossing system comprising a base having a plurality of posts positioned on the outer portion thereof. A lower template includes a plurality of shapes formed therein and a plurality of regions on the outer portion thereof for alignment with the posts. A textured plate is positioned between the base and lower template, and an upper template includes a plurality of regions on the outer portion thereof for alignment with the posts and the regions of the lower template. A plurality of shapes are formed on the upper template. The shapes on the upper template align with the shapes of the lower template when the posts and the regions of the upper template and lower template are in alignment.

Abstract: Apparatus for impregnating surfaces, including edge surfaces, of fiberglass insulation batts with synthetic fibers, comprising a conveyor for advancing the batts in a common direction and, initially, in a side-by-side orientation. Separators thereafter interrupt the side-by-side orientation, exposing the edges of the batts. Extrusion heads located in the area of side edge exposure impregnate the exposed edges with synthetic fibers while other extruder heads apply synthetic fibers to one or optionally both of the top and bottom surfaces.

Abstract: Apparatus for fabricating chip boards or fiber boards of cellulosic material, includes a press, and a press form station arranged upstream of the press and having a storage bin for retaining a material in the form of chips or fibers and a conveyor belt arrangement extending from an outlet end of the storage bin to a receiving end of the press, with the conveyor belt arrangement including a first section forming a vertical, funnel-shaped compaction zone aNd a second arcuate section arranged downstream of the first section for deflecting the material along a curved path from a vertical disposition into a horizontal disposition.

Abstract: The apparatus for manufacturing the nonwoven fabric contains at least one, and may contain up to forty or more, spinneret devices, such as rectangular spinneret plates or round spinneret disks. The spinneret devices may be arranged in rows or in staggered arrangement above a linearly moving collector belt. Spinning orifices on the spinneret devices are respectively dedicated to producing a monofilament or a bicomponent filament from a melt and, viewed in the direction of motion of the collector belt, are arranged with respect to one another so as to correspond in their totality to the cross sectional structure of different filament types in the nonwoven fabric.

Abstract: The present invention provides an apparatus for applying discrete particles of absorbent material to a predetermined location on a fibrous web. The apparatus comprises a continuously rotating mask, and a means for directing a supply stream of absorbent particles to form an acute included angle with a diverting surface on the rotating mask. The mask diverting surface splits the supply stream of absorbent particles into a first intermittent stream passing through the mask and a second intermittent stream deflected by the diverting surface. The absorbent particles in one of the first and second intermittent streams is directed to the fibrous web.

Abstract: A method and system (10) for producing a composite material (108) from particles (102) and binder (104), is described. The system includes a feed zone (12), a unilayering zone (14), a mat reforming zone (16) and a compaction zone (18) all closely coupled to reduce time and allow the use of fast setting binders. A preformed feed mat (100) is fed into the spike wheels (22 and 24) of the feed zone. The spike wheels extract particles from the premat and impinge the particles onto an oscillating shield (26) in the layering zone. The oscillating shield moves across the thickness of the mat-forming zone depositing the particles uniformly on the trailing edge of the reformed mat (106) at the top (48A) of the tunnel conveyor (48) of the mat reforming zone. As the particles move past the lower end (26B) of the shield a binder is added to the particles. Overlays or release films (50) are introduced at the top of both sides of the tunnel conveyor so as to engage the surfaces of the reformed mat.

Abstract: A rapid prototyping method utilizing a powder sintering process and an apparatus for fabricating a product, utilizing the method. The rapid prototyping method includes steps of slicing an image of a product to be fabricated into a number of layers, preparing a mold sheet for each of the slices of the product with a cavity adapted to the profile of the corresponding slice, laying the mold sheet in place on a one-on-the-other basis, feeding the cavity of the mold sheet with a powdery material, pressurizing the material, repeating the preceding steps for each slide to form a multilayer structure for a complete product, and sintering the multilayer structure to produce a finished product. The rapid prototyping method according to the invention provides major advantages over comparable known methods in terms of cost, processing time, and profiling accuracy.

Abstract: A method and apparatus for aligning discontinuous fibers (F 101, 212) is described. A feeder apparatus (20, 120, 220, 220A) is used to align the fibers in a horizontal plane for feeding to the aligning apparatus (40, 140, 240, 240A) providing an electrical (E) field to orient the fibers in one preselected direction. A support or conveyor (70, 170, 270) receives the aligned fibers. The method and apparatus provides composite products having improved physical properties because of the alignment. The fibers can be of different lengths and a mixture of different types to make composites with controlled microstructure and properties. The composite materials can be in the form of non-woven, discontinuous fiber reinforced thermoplastic stampable sheets with controlled fiber orientation distribution. The composites are useful for a variety of goods.

Abstract: An arrangement for fibre-laying on a moving air-permeable conveyor path (2) fibre bodies which are comprised of at least two different layers. The arrangement includes for each fibre layer a succession of air-laying units disposed sequentially in the direction of movement of the conveyor path, wherein each of the units includes elements (6, 7) for passing a stream of air-borne fibres to a region above the moving conveyor path (2), elements (3, 4) for generating a subpressure beneath the air-permeable conveyor path in the proximity of the region in which the stream of air-borne fibres is delivered, and elements (6, 7) for shielding the stream of air-borne fibres from ambient air.

Abstract: Method and apparatus of forming an air laid paper web. Superabsorbing powder is introduced at an intermediate stage between the initial supply of the fibers to the air laying unit and the final formation of the web. A first coarse distribution of the powder is effected in a compulsory manner, independently of the initial supply of fiber material while the final distribution of powder is effected by means of the same air flows which cause the final distribution of the fiber material for forming the even web layer. In this manner the powder is effectively mixed evenly into the fiber material.

Abstract: A stencil printing paper and a process for perforating and engraving the same having the advantages in that the production of the stencil printing paper is easy, the resulting production cost can be thereby reduced and there is no generation of any problem at a time of stencil-making. In a stencil printing paper constituted by laminating a solvent-soluble resin layer to a porous substrate, the present invention comprises a stencil printing paper containing an acetalized polyvinyl alcohol having an acetalization degree of 1-70 mol % and a process for perforating and engraving the stencil printing paper by a mixed solvent containing water and an alcohol type solvent.

Abstract: An absorbent core for use in an absorbent article for absorbing discharged bodily fluid includes a first absorbent material dispersed throughout the core, and a second absorbent material provided in a discrete strip, and substantially surrounded by the first absorbent material. An apparatus and method for producing such cores includes a mold support advanceable in a predetermined direction and having at least one mold therein, and a tubular conduit for the second material alignably positioned such that a portion of the conduit will pass through at least a portion of the mold as the mold support is advanced. The mold support may include a forming drum or a forming belt. The tubular conduit has a distal end through which the second absorbent material may be expelled.

Abstract: A spun-bond apparatus has at the lower edge of the diffuser below the filaments stretching shaft, cooler and spinneret, partitions which run from the lower edge of the diffuser to upper rollers and pressing roller pairs upstream and downstream of the diffuser along the perforated collecting belt on which the spun-bond web is formed. These partitions parallel to the belt and spaced 15 to 50 mm from the collecting surface have been found to limit turbulence which tends to affect the structure of the web in earlier spun-bond fabricating apparatus.

Abstract: A method of casting-masking-molding a thermoplastic resin product, includes the steps of placing a molding sheet 1 on an upper surface of a heated table plate 4, the molding sheet including a molding die 2, and a mask 3 including a plurality of mask constituting pieces 3a, 3b, 3c, ...

Abstract: A distinctive method and apparatus (20) for forming a composite fibrous web (22) includes a web supply (24, 25), which provides at least two appointed fiber layer sections (26, 28) of desired fiber material. Each of the layer sections (26, 28) has a selected composition. A fiberizer (30) disintegrates each of the fiber layer sections (26, 28) into individual, laterally adjacent fiber streams (32, 33) while substantially maintaining a lateral separation of the fiber streams while the fiber streams (32, 33) are moving through the fiberizer (30). A directing channel (34) delivers the fiber streams (32, 33) from the fiberizer (30) to a forming chamber (40). The forming chamber (40) is configured to substantially maintain the separation of the fiber streams.

Abstract: An apparatus and method are disclosed for forming a sanitary napkin having a multi-segment core. Such a core is formed using a mold having a deposition cavity which is divided into cavity segments by at least one partition. Each partition can comprise a passageway for interconnecting adjacent cavity segments.

Abstract: A multilayered absorbent structure is disclosed. The absorbent structure has a plurality of absorbent planar regions defined by decreasing pore size with increasing depth into the region. Generally, each planar region has an absorbent layer having relatively large average pore sizes at the top, body facing surface, and relatively small average pore sizes at the bottom, garment facing surface. A subsequent absorbent region has a top body facing surface with an average pore size which is larger than the bottom, garment facing surface of the previous absorbent region. The top surface of each subsequent planar region is in fluid communication with the lower surface of the planar region above.

Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.

Abstract: A method for applying particulate powder material to a moving, pre-formed, fibrous substrate. In this method, particulate powder material is entrained in a continuous airstream. The air-entrained stream of particulate material exits a nozzle to be applied to the substrate or recirculated. The stream of air-entrained particulate matter has a velocity component in the direction of movement of the fibrous substrate.

Abstract: A forming station used to make a substrate. The forming station has a forming chamber which deposits particles and fibers from an air carrier onto a forming screen movable relative to the forming chamber. Inside the forming chamber is at least one baffle, which creates a velocity gradient and low pressure zone for the air carrier. Different sized components of the substrate have different momentums, and thus are differently affected by the velocity gradient and low pressure zone. This difference causes the different sized components to be sorted according to size. The sorted components are then distributed according to size within the substrate.

Abstract: An apparatus for depositing fibers on a wire (12) for the production of primarily paper products includes a wire (12) and one or more distributors (1) which are diagonal in relation to the wire (12). This minimizes disadvantages which occur when using traditional apparatuses as, in the present invention, impellers (2) mounted in the distributor (1) are provided in rows (4) which, like the distributor (1), are arranged at an angle between 0.degree. and 90.degree. in relation to the direction of movement (D) of the wire (12).

Abstract: A sheet of an absorbent material which, comprises a blend of a fibrous substance and of a granulated substance in which the granulated substance is non-uniformly distributed in the sheet, there being alternating zones of higher and of lower density of said substance along the sheet, is prepared by vacuum depositing (16) a dispersion of the fibrous substance (20) on a moving screen (14) and continuously applying the granulated substance (24) while changing the zone of application in a pendulum-like fashion (34, 36) along the screen.

Abstract: The present invention provides an apparatus and method for forming a composite web having selected discrete pocket regions which are distributed on a carrier layer and contain high-absorbency material. The invention includes a pattern chamber having opposed side walls, an entrance end wall and an exit end wall. A particulate supplying mechanism provides particles of high-absorbency material into the pattern chamber, and a web supplying mechanism provides a gas permeable carrier layer. A foraminous forming mechanism moves the carrier layer through the pattern chamber, and the forming mechanism includes a pattern of openings which are formed therethrough and are arranged to provide for a selected pattern of the discrete pocket regions. A vacuum supplying mechanism provides a selected level of relatively low gas pressure at an underside region of the forming mechanism to produce a selected gas-flow through the carrier layer and the foraminous forming mechanism to form the pocket regions.

Abstract: A method and apparatus for forming a layer structure, such as an airlaid fibrous web, include a supplying mechanism for providing a stream of particulate material, such as fibers. Also included is a substantially endless, foraminous forming belt which has an appointed outward surface and a minimum thickness of at least about 3/16 inch. A selected contour is formed into the outward surface of the belt at selected locations, and the contour is distributed along a lengthwise machine-direction of the forming belt. The forming belt is configured to flex along a thickness direction thereof, and to recoverably bend and substantially straighten when traveling along a selected belt path circuit. A conveying mechanism moves the forming belt past the supplying mechanism along a forming path section of the belt circuit which is substantially straight, and moves the forming belt along a return path section of the belt circuit which includes curved portions therein.

Abstract: An apparatus and method for making absorbent products in which a first material, such as absorbent fluff formed from wood pulp, is introduced into a vacuum forming chamber. A portion of the fluff is deposited into the cavity of a mold transported through the forming chamber by a forming wheel so as to form a layer of pure fluff within the bottom of the mold cavity. A second material, such as superabsorbent particles or heat stabilized fibers, is introduced into the forming chamber so that streams of the first and second materials collide within a mixing zone. As the mold continues it travel through the forming chamber, a mixture of first and second materials from the mixing zone is deposited within the mold cavity, thereby filling it. The portion of the mixture that extends above the surface of the mold is scraped off by a scarfing brush that directs the mixture back into the mixing zone, thereby creating turbulence that ensures thorough mixing of the two materials.

Abstract: An air laying forming station (ALFS) forms a nonwoven substrate from a first material and a second material having at least one physical characteristic substantially different from the first material. The ALFS includes a forming chamber and a forming screen, moving relative to the forming chamber, for receiving deposit of the first and second materials. A first distributor supplies the first material. A vacuum source provides an air flow which deposits the first material onto the forming screen. A second distributor delivers the second material, independently from the first material between the first distributor and the forming screen, by gravity along one or more baffle members.

Abstract: An apparatus and method for forming a discrete layer of particulate material within a composite fibrous web includes a first forming chamber and a supplying mechanism for providing a flow of a selected fibrous material into the first forming chamber. A second forming chamber is selectively located within the first forming chamber to selectively divide the flow of fibrous material. A conveying mechanism transports a particulate material into the second forming chamber. A depositing mechanism is located within the second forming chamber to selectively dispense the particulate material. A foraminous forming layer is movably disposed within the first forming chamber and receives the fibrous material and the particulate material.

Abstract: A fiber reinforced inorganic hardened body is manufactured from raw material consisting of a mixture of reinforcing fiber such as bamboo fiber, water-hardening inorganic binder and water by a manufacturing apparatus for stirring and mixing such raw material and forming it into a mat configuration laminated with the thin layers of fine fibers on both the front and rear sides of the thick layer of the normal raw material. The fine fiber material adhered with the water-hardening binder is partially separated from the main raw material at both the material supply side and material discharge side of a set of pin-type rolls. The portion of the fine fiber separated from the main raw material is first supplied to the upstream side of the forming conveyor to form a first layer of fine fiber.

Abstract: In the production of growth blocks of sphagnum there are considerable operational problems with the required compacting of the loose sphagnum, as both compaction worms and pistons may easily get stuck. Instead, the invention provides for the use of a suction technique, whereby the loose sphagnum (2) is sucked into a perforated pipe (34) in a suction chamber (28), whereby a marked compaction of the material is achievable without any use of mechanical devices. The compacted block material may be surrounded by a decomposable paper casing, which is laid in successively as a lining hose of air permeable paper. The compacted material can be delivered as a compact string (46) by successive projection movements of the suction chamber (28) for being cut into blocks (56), and the suction chamber can temporarily opened for free return movements into its initial position.

Abstract: A fiber blending system includes an apparatus and method of forming a mat of cellulosic fibers and synthetic fibers, as well as a mat thereby formed. The method includes the steps of fiberizing cellulosic material into cellulosic fibers in a fiberizer, volumetrically metering a metered amount of synthetic fibers, and injecting the metered amount of synthetic fibers into the cellulosic fibers. The cellulosic fibers are blended with the metered amount of synthetic fibers in a blending chamber to form a fiber blend. The fiber blend is dispersed through a fiber disperser having apertures of a preselected size and shape to provide a dispersed fiber blend. A third type of fiber may also be mixed with the dispersed fiber blend. The dispersed fiber blend is collected as a mat on a fiber collector to provide a mat of blended cellulosic and synthetic fibers. The mat may be thermobonded by a thermobonder and sandwiched between a facing sheet and a backing sheet.

Abstract: The invention relates to a high molecular absorbent sheet manufacturing process and the related equipment for employing such manufacturing process. The process includes a step of sending a paper pulp and a high molecular absorbent compound to a trough for mixing by wired cylinders and spreading over a conveyer system, a step of drying the mixture carried on the conveyer system, and a step of squeezing the dried mixture into a roll of high molecular absorbent sheet through two matched hot impression cylinders. A sheet of thermoplastic mesh fabric may be respectively covered on the mixture on two opposite sides before the process of drying.

Abstract: An apparatus and a process for the continuous production of mineral wool nonwovens in the nonwoven formation process on the drums of the accumulating conveyors arranged at the lower end of a chute. Several fiberization units (1, 2, 3, 4) communicate with a chute (9) for the formation of a nonwoven (14). The fibres are deposited under the influence of suction pressure onto the curved surface of the accumulating conveyor (10, 11). At least one of the drum-shaped accumulating conveyors (10) is designed to swivel around a pivot (23) essentially arranged perpendicular to the flow direction (22) of the mineral wool such and to the extent that a discharge gap (21) can be adjusted to a width corresponding to the thickness of the nonwoven (14) to be formed.

Abstract: The present invention relates to a multicomponent fibrous nonwoven structure and the process and apparatus for producing the same. More specifically, the present invention relates to a process for forming nonwoven materials using a forming chamber in conjunction with multiple fiber sources and a forming surface to create multicomponent nonwoven materials with varying features. The materials so produced are suitable for use in a wide variety of applications including personal care products such as diapers, feminine pads and adult incontinence products.

Abstract: An apparatus for applying particulate powder material to a moving fibrous substrate is disclosed. The apparatus includes a volumetric dry material feeder for forming a continuous stream of particulate powder material. The continuous stream is then transmitted through a nozzle and exits at an outlet thereof. The nozzle is movable between a first and second position by a motion control. The motion control includes an adjustable differential gear box and an encoder for synchronizing the dispensing of powder at a predetermined location of the substrate. A flow separator is disposed beyond the outlet of the nozzle and intermediate of the first and second positions. In operation, the motion input drives the nozzle to oscillate between the first and second positions at a variable speed over each product cycle. As the nozzle crosses a plane of the flow separator, the continuous stream of particulate powder material exiting the nozzle is split into two intermittent streams of particulate powder material.

Abstract: Disclosed herein is a method of forming strip-shaped electrodes over an end surface of a plate-shaped electronic component and two major surfaces which are in series with the end surface. A slit plate, which is provided with through slits having widths corresponding to the width of electrodes to be formed, is located above an electrode paste bath while an electronic component is arranged above the slit plate so that its end surface extends across the through slits. Before or after this step, the electrode paste is made to swell to a constant level beyond the upper surface of the slit plate, thereby applying the electrode paste to the end surface of the electronic component and the two major surfaces which are in series with the end surface in the form of strips.

Abstract: A cement-bonded particle board with finer particles concentrated at the surfaces of the board and coarser particles concentrated within the board is formed by spreading the particulate material onto a moving carrier (50), the particulate material initially being projected in a first generally horizontal direction above the carrier and allowed to fall gravitationally without interacting with any fixed surface, whilst the falling particles are subjected to a through-flow of air [B] immediately above the carrier in a second direction opposite to that in which the particles are initially projected, the coarser particles being projected preferentially in said first direction and the finer particles being carried preferentially in said second direction by the airstream [B] to effect a second stage of separation.

Abstract: In an apparatus for the shaping and compacting of absorbent pads for absorbing body fluid, which are intended for articles of hygiene and which consist of a plurality of part layers and, if appropriate, are treated with a superabsorbent agent, to form at least one absorbent-pad layer. A rotary band has arranged on it over the entire length of the rotary band, at distances from one another, trough-shaped insertion molds into which shaping insets can be inserted. Along the rotary band production devices are arranged, in twos respectively along the linear outward path and return path, and in the opposite direction to the rotary band there is a driving band which can be pressed against this, and furthermore there is arranged a thermal compacting device which has calender and/or embossing rollers following in the conveying direction and which consists of a heating cylinder with a pressure band arranged on it.

Abstract: A method and apparatus for forming a non-woven pad of fibrous material is provided in which highly moisture-absorbent particles and fibers of thermoplastic material are intermixed with the fibrous material throughout one or more predetermined portions of the thickness of the non-woven pad while maintaining other portions of the thickness of the pad substantially free of highly moisture-absorbent particles and/or thermoplastic fiber material. The non-woven pad is formed on one side of a conveyor moving through a forming chamber which has a duct connected to a source of vacuum operable to draw fibrous material injected into the chamber onto the conveyor.

Abstract: A method and apparatus for depositing straight elongate fiber-bundle strands, such as sugarcane or sweet sorghum rind strands, in a loose pile on a conveyor with the strands randomly oriented in substantially parallel planes during manufacture of structural panel from such strands. The method includes dropping bit by bit a randomly-oriented collection of strands over a drop edge located above the conveyor and flicking the strands onto the conveyor by quick downward motion of counter-rotating arrays of flicker tines in the drop zone.

Abstract: A stencil kit including a case, a drawing panel releasably mountable to said case in the manner of a cover, and multiple stencils selectively mounted to drawing surfaces formed on opposite faces of the drawing panel. The drawing panel includes an integral handle, which, upon a mounting of the drawing panel to the case, provides a handle for the entire kit. Interengaging lugs and a latch and keeper assembly provide for releasable joinder of the drawing panel to the case. Positioning flanges, projections and recesses about each drawing surface and on the associated stencils releasably position the stencils for use.

Abstract: In the continuous production of mineral wool nonwoven fabrics, fiber/gas/air mixtures (3, 4) produced by several shredding units (14 to 17) are directed onto collecting conveyor units (19, 21) with suction surfaces (c, d) running in a curve and being under suction pressure for the formation of a wool nonwoven fabric (25). In this case the arrangement is such that an imaginary suction surface, increasing in its size in the conveying direction, is assigned to each fiber/gas/air mixture formed by the individual shredding units (14 to 17), actually d is larger than c. As a result it is possible, in a space-saving method of construction and per collecting conveyor unit to produce mineral wool nonwoven fabrics from rock wool with constant suction pressure with bulk densities even under 25 kg/m.sup.3 in good product quality. By series connection of several units or an oscillating deposit of an individual nonwoven fabric multilayer felt webs can further be formed.

Abstract: The present invention relates to a method and an apparatus for manufacturing a fiber slab (32), in which a fiber/air suspension is blown through a nozzle into a forming space (9). The forming space is defined by two mutually facing belt parts of two endless belts (10, 11). For the purpose of manufacturing the novel fiber slab, there is generated between the nozzle exit orifice (8') and the forming chamber a mist of highly liquid adhesive, and the fibers are imparted kinetic energy of such high value that the fibers pass essentially rectilinearly through the mist and into the forming chamber, where they collect on the slab end surface (36) earlier formed in the forming chamber and facing the nozzle.

Abstract: A method of forming and bonding fluff pads for diapers and the like wherein both the steps of forming and bonding are performed on the same vacuum drum.

Abstract: A process for continuously forming a product having elongated members at least about one foot long which are oriented, compressed and bonded is provided, the process comprising depositing elongated members on a moving carrier with an orientation that is substantially parallel to the direction of movement of said carrier, said members being deposited on said carrier over a length of carrier that is at least as long as about one and one-half times the length of the elongated members and is at least as long as about 30 times the final thickness of the compressed, composite product.

Abstract: Method and apparatus for supplying binder to newly formed mineral wool fibres by means of several distribution means like nozzles or spreaders (30-33, 36-36, 41-43) while said mineral wool fibres are suspended in an air or gas stream on their way to a collection means (29), which in one or more steps form a final mineral wool path (F-J), whereby the binder or binder mixtures from the different distribution means (30-33, 35-36, 41-43) are supplied to different parts of the fibre suspension and in such amounts--in relation to the fibre flow in that part of the fibre suspension, which is actuated by the respective distribution means--that different layers (e.g. F+J, G+I, H) of the final mineral wool path get different content of binder.

Abstract: Apparatus and methods for forming improved airlaid fibrous articles are disclosed. Airlaying apparatus is provided which permits at least two types of fibrous materials to be defiberized and transported to a single airlaying apparatus. In a most preferred embodiment, a drum-type airlaying drum having a plurality of deposition cavities is provided. By controlling the airflow and pressure differential, selective placement of each type of fibrous material within a cavity is achieved. Also disclosed are improved deposition cavities which permit multiple materials to be airlaid and retained in position by providing a foraminous surface on at least a portion of the cavity sidewall. Most preferably, a hydrophobic fiber layer is formed and a layer of absorbent fiber is deposited within the first layer; the present invention permits a clear demarcation between the fiber types. Also disclosed is improved apparatus for removing airlaid articles from deposition cavities, using a precisely controlled airstream.

Abstract: An apparatus for making more uniform the distribution in weight per unit area of a one layer or multi-layer mat for the manufacture of wooden chipboard, wooden fiberboard or like boards includes a reverse brushing unit extending over the width of the mat is associated with the mat carrier (1) which is fed by at least one scattering head. A distributor unit (4) disposed in the backward scattering path for the mat particles is inserted in front of this reverse brushing unit (3) in the direction of movement of the mat (2) for the variable deflection of the incident mat particles.

Abstract: An apparatus for laying a mat of fibrous material which includes an upwardly inclined belt onto which the fibrous material is fed, one or more combing roller located above the belt, a stripping roller at the upper end of the belt for removing the material from the belt and passing it into a mechanism for laying the material into a mat. The angle of inclination of the incline belt and the position of the first combing roller as such that the material can build up to reach a critical angle of repose and then slide back down. A second combing roller located upstream of the first combing roller serves to comb the material to a constant depth, and the speed of the incline belt is adjustable to determine the amount of material leaving the incline belt and thus regulate the thickness of the formed mat.