Abstract: A filter for flowing polymer having a filter element progressively advanced between an on-stream position communicating between the upstream and downstream passages and a backflush position. In the latter position, filtered polymer is forced through a segment of the element in the direction opposite to on-stream flow. The filter is advanced in steps alternately with the energization of a pump for creating the backflush pressure. The steps are determined to cause each filter portion to remain in the backflush position for at least two consecutive steps.

Abstract: Apparatus for filtering plasticized material between two discrete inlets and a main outlet of a housing has two passages each of which connects one of the inlets with the main outlet. Each passage receives a reciprocable cylindrical filter carrier which can establish or interrupt a path for the flow of plasticized material from the respective inlet to the main outlet, depending on the selected axial position of the carrier. In order to expel contaminants which gather at the upstream side of the filter in a carrier, the carrier which is to be relieved of contaminants is moved to an axial position in which the respective inlet is sealed and the space at the downstream side of the filter receives filtered plasticized material substantially centrally of the filter. Contaminants are expelled from the space at the upstream side of the filter by way of a second outlet which is provided in the housing and communicates with the filter chamber of the carrier which is in the process of being relieved of contaminants.

Abstract: An extruder assembly for composite materials, the extruder assembly having a barrrel with feed and compression sections, a rotatable screw adapted to convey a composite material through the barrel, at least one fiber alignment means, and a die. The screw diameter in the feed section is approximately twice the screw diameter in the compression section, and the flight spacing in the feed section is approximately twice the flight spacing in the compression section.

Abstract: A sieve arrangement for cleaning synthetic plastic melts of a high pressure press has a housing having a throughflow opening which is arranged to form a part of a flow passage of a high pressure press, a disc provided with a plurality of perforations and movable in the housing so that at least one of the perforations is always in the region of the throughflow opening and at least one of the perforations is always outside the housing, a plurality of sieve discs arranged inside the perforations, a blockable spraying passage provided at the side of the throughflow opening which is located behind the disc as considered in a flow direction, a slot-shaped spraying nozzle associated with the perforation located away outside the throughflow opening and inside the housing so that the spraying passage opens into the spraying nozzle, an outlet passage provided in the housing at a side of the disc which is opposite to the spraying nozzle.

Abstract: An extruding apparatus having a reservoir for reserving a treatment-object material including a main raw material, additives or auxiliary materials, a screw disposed within a material-conveying passage and for conveying the material to a terminal end, and an extruding die disposed at the terminal end and for extruding the material into a predetermined shape. The material-conveying passage includes a pair of discs disposed at intermediate positions in the conveying direction of the screw and opposed to each other transverse relative to the passage. Each of the discs defines a plurality of slit pores extending in the material conveying direction, with one disc being operatively coupled with the screw to be rotatable relative to the other disc. The disc pair constitutues a milling-kneading mechanism for milling and kneading the material by causing the material to pass through the slit pores formed by the disc pair.

Abstract: In the filtering apparatus for an extrusion machine, a stream of heat-softened plastic material arrives via a flow conduit in a filter housing at an outlet, and thereby permeates replaceable filter means which are carried by a slide which is temporarily slid out of the stream of plastic material. For this, the slide comprises two chambers, forming flow conduit sections and arranged spaced in tandem in the direction of displacement, both of which are closed by filter plates. The slow conduit sections being, at a specified position of the slide in the filter housing internally in flow connection via, in each case, a port, with the outlet conduit in the filter housing and, externally via the filter plates, with the inlet conduit or with a backflow conduit in the filter housing.

Abstract: Apparatus for filtering plasticized material between the inlet and the outlet of a housing has two parallel passages for reciprocable filter carriers each of which is movable between a first position and a second position. When in their first positions, the carriers permit plasticized material to flow from the inlet, through filters in their filter chambers and then into the outlet of the housing.

Abstract: A device for the separation of particulated solids from a pressurized fluid, in particular from a viscous mass of a thermoplastic material, with a cleaning system for the filtration element based on the "return pressure" principle.The device comprises a body having a fluid inlet conduit, two filtration assemblies that are connected to two conduits flowing together into an outlet conduit, and a flow-dividing valve that in rest position connects the inlet conduit with the separation conduits through the filtration assemblies, while in the cleaning position for one of the filtration assemblies the inlet conduit is connected with the other filtration assembly, thus causing part of the fluid that has been separated by this filtration assembly to pass with counterpressure through the filtration unit that is in the cleaning stage and through a discharge outlet housed in a compartment of the valve.In a similar manner the cleaning of the other filtration assembly is performed.

Abstract: The prefilter assembly is provided with a central cavity in which a plurality of tubular porous tubular elements are provided with the remaining space being filled by a mass of shattered metal particles. During filtration, the shattered metal particles eliminate dead space within the filter while also filtering out micro gels which may be in the polymeric material. The shattered metal particles also reduce the possibility of gel formation due to cross-linking of the polymer mass therethrough.

Abstract: An extrusion head for forming a two-part laminated sheet from a single tubular-shaped extrudate stream emitted from the outlet of a single extruder. The stream flow into an enclosed chamber which diverges the stream in width and converges it in thickness. This stream is split by a wedge divider insert which extends across the outlet end of the chamber into multiple parallel, horizontal streams. Each stream then passes through a breaker plate or screen to remove any foreign particles present in the extrudate. A converging preform die in combination with a triangular preform insert converges the upper and lower streams into a single stream at a final die producing the unitary two-part laminate, preferably symmetrical about the horizontal plane. The extrudate preferably is an elastomer and the resulting laminated sheet is used as a tire innerliner.

Abstract: A filter exchange device in a molten resin passage in an extrusion molding machine, which includes at least one filter casing for airtightly enclosing a spare filter and having port means for exhausting air out of the filter casing and filling the interior thereof with a gas inactive to molten resin. Fish eyes contained in the molded product after filter exchange reduced in number.

Abstract: Spinning apparatus for the production of monofilament yarn includes a spinning tool having a flow channel in the form of a flattened U for providing polymer melt to a group of nozzles, the flow channel having a cross-sectional area which becomes larger, at least in an upper part thereof, in a direction of polymer melt flow therethrough.

Abstract: A screening device for a melt of plastic material includes a housing provided with a throughflow boring forming a part of a high pressure plastic press. A screen plate is movable transversely across the boring and includes a series of screening openings arranged at the level of the throughflow boring and being separated one from each other by an narrow web. To minimize the formation of pressure gradients in the throughflow boring when a new screening opening is entering the boring, each web has at its interface with the housing a narrow overflow slot which sets up a gradual connection for an inflow current of the melt during the entry of a new evacuated opening into the region of the throughflow boring.

Abstract: A filter apparatus is provided comprising a number of cylindrical candle filters, each of which contains a displacement body forming a space of uniform width between itself and the candle filter. The filter material of the candle filter is supported by a cylindrical supporting body which has passages through which a plastic melt to be filtered can flow. A number of filter apparatuses can be arranged on concentric circles on a cylindrical filter housing so as to minimize the dwelling time of the plastic melt flow through the filters and to minimize the pressure loss over the length of the filters.

Abstract: An improved continuous polymer filter of the screen belt type employs a valve arrangement to selectively apportion the extruder output flow through at least two filter paths. In the neutral valve position both filter paths receive polymer at equal flow rates creating a pressure across the screen belts that is too high to permit the screen belts to be advanced when a clogged belt section requires replacement with a clean section. To effect screen belt advancement, the valve is actuated to reduce the flow rate in the filter path requiring the replacement while increasing the flow rate to the same degree in the other filter path so that the net flow rate remains substantially constant. The screen belt receiving the reduced flow experiences a sufficiently reduced pressure drop thereacross to permit it to be advanced in a conventional manner, after which the valve is returned to its neutral state.

Abstract: A method of extruding a ceramic batch supplied from a vacuum auger machine into a formed body by a plunger molding machine, included the steps of loosening and crushing a supplied ceramic batch in the vacuum auger machine, extruding the loosened and crushed ceramic batch from the vacuum auger machine into a formed columnar body which is of a size able to be inserted into a cylinder of the plunger molding machine, and extruding the formed columnar body from the plunger molding machine to form a formed body of a predetermined shape. An apparatus for extruding a ceramic batch includes a vacuum auger machine having of a vacuum kneading section for kneading a ceramic material to produce a ceramic batch, a columnar body forming section for forming the kneaded ceramic material into a columnar body, and a batch transfer section having an auger for transferring the ceramic batch to the columnar body forming section.

Abstract: A shaped body of ice cream built up of layers is described. The individual layers (3) of ice cream consist of extruded strands (2) that are laid down in the form of curves, for example an eight, beside and on top of one another.Further, an apparatus for preparing such shaped bodies is described wherein a plurality of nozzles are arranged side by side and with the outlets underneath in a moveably mounted support plate. The supply side of each nozzle is connected via a supply line with a distributor head and the support plate is moved in curves by means of a mechanism. A moveable substrate for the extrudate, for example a conveyor belt or a tray, is arranged underneath the nozzles.

Abstract: A mold station of a food patty molding machine in which a food pump pumps a moldable food product through a fill passage into mold cavities in a cyclically reciprocating mold plate, with a multi-orifice plate interposed in the fill passage and a stripper plate, slidably mounted immediately adjacent the orifice plate, having a multiplicity of fill openings aligned one-for-one with the fill orifices; a stripper plate drive, synchronized with the mold plate drive, slides the stripper plate a short distance to a seal-off location once in each mold plate cycle. The spacings between fill openings in the stripper plate are made large enough to close all of the fill orifices when the stripper plate is moved to its seal-off location; the stripper plate drive shifts the stripper plate to its seal-off location before movement of the mold plate toward its discharge position can create an open outlet path from the food pump through the mold cavities to outside of the mold station.

Abstract: Polymer filtration apparatus comprising a body having a pair of upstream passages each terminating at a slide channel and a pair of downstream passages respectively opposing the upstream passages, and a slide member in the channel having apertures for a pair of replaceable filters each normally communicating between an upstream passage and a downstream passage. The extents of the channel surfaces between the pairs of passages and between each passage and the exterior of the body, and the extents of the filter apertures on the slide member are related so that one filter remains active when the slide member is in position for replacing the other filter. After a filter has been replaced the new filter may be prefiled without pressure loss in the polymer or excessive leakage thereof.

Abstract: A filtering system for use in coextrusion apparatus, and particularly for removing carbon particles from a core extrudate of thermally degradable barrier material which has been preencapsulated with a preencapsular material. The filter includes a casing and a frame mounted to the casing. A coarse filter screen through which the component streams can flow is also provided. The coarse filter screen is mounted to the frame and is composed of a web of woven strands having a sufficiently small diameter so as to permit the preencapsulated core extrudate to pass through and emerge from the coarse filter screen without substantial mixing of the barrier material and the preencapsular material. The fine filter screen is supported by the coarse filter screen upstream of the coarse filter screen.

Abstract: A filter changing apparatus for use in an extrusion press, comprising a frame, filter support members hydraulically displaceable in the frame, in a direction which is substantially at right angles to the flow of material through the press and filters disposed in each of the filter support members, at least one of the filter support members being detachably mounted in the frame, and a support member for discharging residues of rubber or thermoplastics material from the extrusion press, the support member being detachably mountable in the frame in place of the at least one detachably mounted filter support member, the support member having associated therewith a discharge plate for displacing residual material in the extrusion press to a discharge station.

Abstract: An extrusion die has at least one distribution bore which communicates with a central bore which receives extruded material from an extruder. Each distribution bore extends perpendicularly with respect to the longitudinal central axis of the central bore and then terminates in a first chamber which has an substantially rectangular cross-section. Each first chamber receives the extruded material from its associated distribution bore and terminates in a counter-pressure distribution plate having a cross-section corresponding with that of the first chamber and having a plurality of bores uniformly distributed therein for forming extruded material from the first chamber into a plurality of strands which are received by a second chamber.

Abstract: Apparatus for continuously filtering a flow of melted plastic which includes means for purging the filter without interrupting continuous operation. A filter assembly consists of a trap plate and breaker plate between which filters are disposed. The trap and breaker plates each defines triangularly shaped openings diposed in a circular array, each of which is subdivided into smaller passages for filtering larger contaminants. Individual filters also of triangular configuration are sandwiched between registering openings between the trap and breaker plates, each filter consisting of a fine and coarse screen. A collector head is rotatably disposed for selective registration with each of the openings of the trap plate, and an indexing mechanism is included for stepping the collector head for stationary registration with each opening. The collector head communicates with a contaminant discharge passage that is open and closed in timed sequence with movement of the collector head.

Abstract: A method of forming foamed fibers which comprises the steps of forming a melt of a polymer of fiber-forming molecular weight in which is admixed a blowing agent, and a closed-cell-forming additive, extruding said melt through a spinnerette, quenching said melt downstream of said spinnerette under conditions at which bubbles form in said melt, and drawing said melt as it is quenched to produce a foamed fiber having fine bubbles contained therein is disclosed. The product fibers may contain substantially only closed-cells and/or substantially uniform cross sectional area cells.

Abstract: A filter apparatus, particularly for filtering extruded thermoplastic synthetic plastics material, has a housing, within which two carrier members are shiftably arranged, each of which carries a sieve means consisting of two filter sieves. The material to be filtered is supplied to the entry side of the sieve means via an inlet passage. Within each carrier member there is provided a rinsing passage being in connection with the outlet side of the sieve means. The rinsing passage can be connected with the outlet passage when shifting the carrier member into a rinsing position. In this rinsing position, the entry side of the sieve means is at least partially connected with a space receiving the sieve contaminations or opens into atmopshere, respectively.

Abstract: Cryogenic cleaning apparatus using dry ice pellets having a pellet extruder and static means to break the extruded dry ice.

Abstract: An annular extrusion die for the production of a tubular thermoplastic film web material, such as an annular extrusion die including a filtering arrangement for the formulation of a more consistently or uniformly distributed polymer melt conveyed to the die orifice of the extrusion die which will impart improved properties to the extruded thermoplastic film material. Also disclosed is a method of producing an improved extruded thermoplastic film web material through the utilization of the inventive extrusion die arrangement. A cavity or die flow chamber within the body of the annular extrusion die is filled with a particulate inert material of either uniform granular size or of random sizes, so as to force the polymer melt being conveyed towards the die orifice to randomly flow through the interstices which are present between the particles of the granular material, and thereby uniformly fill the cavity.

Abstract: The filter assembly is constructed of outer sleeves of wire screen, a mass of shattered metal particles within the sleeves and at least one tubular filter element within the shattered metal particles. The mass of shattered metal particles serves to remove micro-gels from the polymeric material flowing through the filter assembly while the inner filter element serves to remove particulate matter.

Abstract: Apparatus is disclosed for the separation of admixtures from contaminated thermoplastic materials. The apparatus has a distributor screw, a retainer chamber and return flow holes for contaminated materials to pass from the retainer chamber into an annular space formed between the distributor screw and the screening element within the pressure chamber. The materials circularly travel around saw-like teeth of the distributor screw and back through the flow holes into the retaining chamber. The retainer chamber and the annular space are openly connected to each other at the inlet side of the pressure chamber. Purified materials exit through one outlet exit and admixtures exit through a second exit.

Abstract: A synthetic resin plate having at least two different colors is prepared by a process having the steps of supplying at least two polymerizable liquid materials differing in the color from at least two inlets, passing them through at least two groups of flow paths alternately arranged, extruding and injecting the polymerizable liquid materials into a polymerization apparatus, polymerizing the liquid materials, and withdrawing a plate-shaped product having a striped pattern extending from the surface to the interior or a plate-shaped product having said striped pattern in which the boundary area between the adjacent stripe lines of different colors is gradated.

Abstract: An apparatus is disclosed for optimizing a method of producing a foam or expanded thermoplastic material, the material usually being mixed with a propellant. The apparatus comprises a filter unit which is disposed between and connects, a fusing and homogenizing extrusion device and a dynamic cooling device. The material is fed into the apparatus at one end of the extrusion device and passes sequentially through the extrusion device, the filter unit and the cooling device. Separate drive means are provided for the fusing and homogenizing extrusion device and the cooling device respectively. Both the extrusion device and the cooling device are disposed on a common longitudinal axis. The connections of the two devices to the filter unit is effected by means of flange mountings. The filter units also includes interchangeable filters which are traversed by the material. In the filter unit, the material flows through a conduit which flares conically outwardly from the filter to the inlet of the cooling device.

Abstract: A filter device for a screw extruder for the handling of molten plastic comprising a filter housing having inlet and outlet bores and a slide displaceable in the housing transverse to the direction of the flow of the melt. At least one recess in the slide forms a portion of a melt channel and receives a screen member. In order to obtain uniform distribution of the flow of melt in the filter device and of the pressure forces acting on the filter surface, the recess is formed by an annular milling which is surrounded by a replaceable cylindrical screen member. A flow passage in the slide extends from the melt channel to the outlet bore.

Abstract: Sieve device for cleaning molten plastics in conjunction with a high-pressure press and consisting of a housing with a flow-through bore that constitutes part of the flow channel of the high-pressure press and of a plate or disk that can be displaced or rotated in the housing and that has several perforations or sieve chambers, at least one of which is always in the vicinity of the flow channel and at least one of which is always outside the housing, whereby either a sieve disk is always positioned inside the flow channel or sieve disks are positioned inside the perforations. At least one perforation is always inside the housing but outside the flow channel and can be evacuated before entering the flow channel by a suctioning-out pump or similar device. The sieve chambers are all separated from one another by curved webs, with the surface of one web equal to about 10% or less of the overall surface of one sieve chamber.

Abstract: An assembly of fibers composed of at least two dissimilar fiber-forming polymers, characterized by the fact that(1) it consists of numerous fibers,(2) at least 90% of said fibers have a non-circular cross-sectional shape,(3) the cross-sections of at least 50% of said fibers differ from each other in at least one of shape and size, and(4) at least 50% of said fibers each have in their cross-section taken at right angles to the fiber axis at least two side-by-side coalesced blocks of at least two dissimilar fiber-forming polymer phases with at least a part thereof being exposed to the peripheral surface of the fiber, at least one of the number, shape and size of the blocks varying from fiber to fiber.

Abstract: A molten polymer containing a blowing agent and, usually, a nucleating agent, is spun into fibers with screen packs or equivalent structures upstream of the spinning apertures. The use of screen packs enables the production of fibers with finer bubbles, which are therefore susceptable to greater melt-drawdown and postdrawing and can have better tensile properties. Foamed polyamide fibers are produced with average bubble diameters one-twentieth or less, compared to the effective fiber diameter.

Abstract: A passage for transferring molten plastic material processed in an extruder contains distributing elements for dividing the molten stream into partial streams and for recombining said partial streams in a different relation to each other. In order to minimize boundary layer faults which result from the distribution of the partial streams, the molten stream is divided into partial streams by at least one annular distributing disc, which is provided on its entrance side with an annular series of openings, and in which adjacent ones of said openings are succeeded by bores which extend radially outwardly and radially inwardly, respectively, so that the molten stream is divided into sectorlike partial streams which are conducted radially inwardly and radially outwardly, respectively, in adjacent bores and are then recombined.

Abstract: A cassette filter for molten plastic comprising a filter screen movable transversely of the melt flow and enclosed between plates in a filter casing of an extruder. The superimposed plates are engaged in a guide passage and the inlet and outlet of the filter casing is sealed by cooling of the melt. The surface of the filter screen is clamped between a tooth-shaped surface of a plate and a cover member which interfits in the profile.

Abstract: A diverting plate having the same external configuration as a changeable strainer in a flow line for a molten polymer. Contamination is removed by substituting the plate for a strainer.

Abstract: A sealable discharge die for thermoplastics, comprising a housing, a dieplate which closes the latter except for perforations for discharge of the plastic melt in strands or filaments, and a perforated plate located immediately below or above this dieplate, one of the plates being slidable or rotatable and the perforated plate having orifices which can be brought into alignment with the perforations of the dieplate.

Abstract: The constituents of a flow of thermoplastics material or the like are mixed and blended by passing the flow through a mixing structure which defines an array of elongate side-by-side passages. The passages are not all alike in that at least some of them have configurations which taper along their lengths to degrees or in directions that differ from the configurations of others of the passages, whereby the flows of fluid which discharge from the differently configured passages do so at differing velocities. As the discharging flows of differing velocities recombine to form a common flow having a uniform velocity, a desirable type of mixing and blending action results. In preferred practice, adjacent ones of the passages are tapered oppositely along their lengths to converge or diverge such that fluid flowing through the converging passages is caused to increase in velocity, while fluid flowing through the diverging passages is caused to diminish in velocity.

Abstract: A filter for removing solid contaminants from plastic melt as well as homogenizing the plastic melt prior to injection, including a generally cylindrical filter screen having an inlet passage receiving the unfiltered plastic melt. Axially arranged series of relatively large diameter holes extend between the inlet passage and filter grooves formed in the surface of the filter screen. A first stage, coarse filtration is achieved by flow through the holes radially outwardly from the inlet passage into each of the filter grooves. A second stage, fine filtration occurs by flow from the filter grooves through circumferential clearance spaces located between each of several lands separating the filter grooves and the interior of the filter cavity. Filtered plastic is collected in axially extending discharge grooves also formed in the filter screen surface intermediate the pairs of filter grooves.

Abstract: In an extruder of the type including an extruding cylinder with an outlet at one end thereof and an extruding screw rotatably disposed in the cylinder and circumferentially formed with a feed flight member for forwarding a plasticized material through the outlet of said cylinder for extrusion through a screen located at the fore end of the extruding cylinder, a screen/diverter changing mechanism including a retainer box fixed to the fore outlet end of the extruding cylinder and internally defining a flow passage of the plasticized material to be extruded; a slide body movable transversely in a guide bore of the retainer box across the flow passage thereof; a screen unit detachably fitted in the slide body and having a screen and a plurality of nozzles; a diverter unit detachably fitted in the slide body and having a diverting flow passage for diverting the flow of the plasticized material from the cylinder; a drive mechanism linked to the slide body for selectively positioning either the screen unit or divert

Abstract: The material flow within an extrusion die body is adjusted by a metering device to alter the product perforation pattern of an extrusion product produced in the extrusion die without changes of or modifications to any of the various other parts of the extruder system being required. The extruder system is an apparatus which includes, in addition to a hydraulic cylinder powered press, a basic extrusion die, a die body, a set of perforation forming die pins and a ported cover or pin support plate.

Abstract: A screening apparatus for molten plastic material flowing from an extruder comprising a housing mounted on the extruder and having a feed channel for flow of the plastic material therefrom and a slide member mounted for slidable movement in the housing with a clearance therebetween. The slide member contains replaceable screen elements adapted for being positioned in the path of flow of the plastic material flowing from the extruder to effect screening thereof. In order to seal the clearance between the slide member and the housing to prevent outflow of plastic material therefrom, a flange is mounted on the housing to surround the slide member with a gap therebetween. This permits normal free-sliding movement of the slide member in the housing. The flange contains cooling channels to permit flow of a coolant to cool plastic material in the gap and solidify the plastic material to prevent outflow of plastic material from the gap.

Abstract: A filter pack (20) and method of making the same are provided. Finely divided inert material (23) is bound in the filter pack (20) for use in a spin pot. Essential elements are a wall (21) which defines a cavity in which the finely divided inert material (23) is placed, a cap (26), a first cover (25), and a first screen member (24) comprised of at least one screen having a mesh size which prevents passage of the finely divided inert material therethrough but which allows passage of a fluid therethrough. The first screen member (24) forms a press fit between the wall (21) and the first cover (25) to cover the exposed portion of the cavity. The finely divided inert material (23) is compressed in the filter pack (20) by the intrusion of the first cover (25) and the first screen member (24) into the cavity occupied by the finely divided inert material (23).

Abstract: A filtering arrangement of thermoplastics extruding apparatus has a rotatable cylindrical screen unit through which material flows radially inwards and is discharged axially and an outlet aperture for impurities which are washed from the screening unit by reverse flow, i.e. radially outward flow, of part of the filtered material. The outlet aperture for the impurities is variable in cross-section by moving an arcuate segment about the axis of the cylinder to control the extent of reverse flow washing.

Abstract: An apparatus for forming a plastic pipe having a circular cross-section and elongated longitudinal channels in the pipe wall is disclosed. A mass of synthetic plastic material is pressed through an annular space defined by inner and outer annular supports, the annular space having a plurality of spaced pin supports concentrically disposed therein and regulating the quantity of material flow through the annular space, depending on the shape of the pin supports, by selectively moving the walls of the annular supports closer to each other. In a particularly advantageous embodiment, either the wall of the inner annular support or the wall of the outer annular support, or both, are moved closer to each other in the area between adjacent pin supports.

Abstract: Method and extruder for manufacturing plastic pipes provided with longitudinal channels in its wall. Before the extrusion nozzle of the extruder, the stream of plastics to be extruded for forming the pipe is subdivided into two concentric annular streams flowing through two annular division channels formed by means of a dividing member being retained by only a breaker in the outer division channel, the other division channel forming a free passage between the channel inlet and the outlet.

Abstract: A cartridge filter is provided in which a powdered filter medium is encapsulated between screens which are sealed to the side wall of the cartridge. The side wall has a flange which engages the upper surface of a holder into which the cartridge fits. The holder is part of a spin-pack assembly in which the cartridge filters fiber-forming material immediately before the material passes through spinneret capillaries and is formed into filaments.

Abstract: A die for extruding a honeycomb structural body, all parts of which are uniform in mechanical strength, is disclosed. The die is provided with guide grooves between discharge slits and feed inlets for raw stock, said discharge slits having a cross-sectional shape corresponding to that of the honeycomb structural body and said guide grooves having a cross-sectional area larger than that of the discharge slits.