Abstract: Methods and systems are disclosed for encapsulating viable cells which produce biologically-active factors. The cells are encapsulated within a semipermeable, polymeric membrane by co-extruding an aqueous cell suspension and a polymeric solution through a common port to form a tubular extrudate having a polymeric outer coating which encapsulates the cell suspension. For example, the cell suspension and the polymeric solution can be extruded through a common extrusion port having at least two concentric bores, such that the cell suspension is extruded through the inner bore and the polymeric solution is extruded through the outer bore. The polymeric solution coagulates to form an outer coating. As the outer coating is formed, the ends of the tubular extrudate can be sealed to form a cell capsule. In one embodiment, the tubular extrudate is sealed at intervals to define separate cell compartments connected by polymeric links.

Abstract: A plurality of cores are covered with the same jacketing material by passing the cores through respective dies of a plate, while flowing the jacketing material through sub-channels in the plate and into coating relationship with the cores. Any of the sub-channels can be shut off by diverting the jacketing material a flow diverting path without affecting the flow in the other sub-channels.

Abstract: An apparatus (10) is disclosed for simultaneously forming two dough sheets from a single cooker extruder (12), with the dough sheets each being formed by a plurality of dough ropes which are guided by guide posts (44) at equally spaced intervals on a conveyor (16) for passing between the pressing rollers (42) of a sheeting device (18). Specifically, the die (24) attached to the die head (20) of the cooker extruder (12) includes a roof-shaped extension formed by first and second die plates (26) interconnected by their front edges at an obtuse angle. Top and bottom pates (28) are interconnected to the top and bottom edges of the die plates (26). The back edges of the die plates (26) and of the top and bottom plates (28) are interconnected to an annular connection plate (30) which is attached to the die head (20) by bolts (34) passing through counterbored bores (32) in the connection plate (30) and threaded into the die head (20).

Abstract: The rubber products forming a part of the structure of a tire are laid onto a rigid core by means of a volumetric extruder having an outlet orifice of small size positioned close to the surface on which the rubber is to be applied. The rubber products are built up by a meridian displacement of the orifice relative to the receiving surface with the extrusion of a controlled volume of rubber.

Abstract: Methods and systems are disclosed for encapsulating viable cells which produce biologically-active factors. The cells are encapsulated within a semipermeable, polymeric membrane by co-extruding an aqueous cell suspension and a polymeric solution through a common port to form a tubular extrudate having a polymeric outer coating which encapsulates the cell suspension. For example, the cell suspension and the polymeric solution can be extruded through a common extrusion port having at least two concentric bores, such that the cell suspension is extruded through the inner bore and the polymeric solution is extruded through the outer bore. The polymeric solution coagulates to form an outer coating. As the outer coating is formed, the ends of the tubular extrudate can be sealed to form a cell capsule. In one embodiment, the tubular extrudate is sealed at intervals to define separate cell compartments connected by polymeric links.

Abstract: The present invention relates to a method and apparatus for charging a high-viscous material in a material tank into a charging tank. The high-viscous material, namely, putty is used preferably as a material for correcting the dynamic unbalance of a rotary body. When the material is charged from the material tank into the charging tank through a nozzle, the pressure of air in the charging tank is reduced and the pressure of air in the material tank is increased to drop the high-viscous material in droplets without taking air thereinto and air which has permeated into the material in the material tank can be removed.

Abstract: A free-standing die assembly, for use in the production of extruded products, which is mounted as a separate unit apart from the extruder in which product ingredients are processed. The die assembly includes a center plate having a die unit secured to one or more planar faces of the plate, with each of the die units having at least one die orifice in the outer surface thereof. Hot flowable dough processed in an extruder is carried via suitable tubing to the center plate from where it is distributed to the planar faces of the plate and into the die units, from which it is extruded through the die orifices in the die units. The die assembly may be modified to permit the production of coextruded product from the die orifices in the die units of the assembly. One or more of the die assemblies may be associated with a single extruder. In accordance with a preferred embodiment, die units are secured to opposing side faces of the center plate to provide a free standing, dual-faced die assembly.

Abstract: Novel method and apparatus for forming a substrate or honeycomb article with multi-cellular densities and/or multi-cellular geometries by positioning a pair of extrusion dies adjacent one another, such that one surrounds the other, and such that discharge slots of one die produce different cellular densities and/or geometries from that of the other. Further, an annular batch reservoir is formed between the mating surfaces of such dies so as to facilitate the flow of batch material from one die to the other, and an integral inner skin is formed between the differing cellular structures.

Abstract: An apparatus for mixing powder and liquid together continuously comprises a housing (1) which has a conical surface (16), and a rotor (7) which is journalled for rotation in the housing and which has a conical surface (9). The housing has provided therein a liquid inlet (20) through which liquid is delivered to a gap between the conical housing and rotor surfaces, and a powder inlet (12) through which powder is delivered to the upper surface (8a) of the rotor. As the rotor rotates, a liquid film is formed on the conical housing surface while, at the same time, powder is thrown onto the liquid film with the aid of rotor-carried guide vanes (10). The mixture is worked and pressed out through an outlet (30) by wing-like elements (11) carried by the rotor.

Abstract: An apparatus for dividing a mass of dough into a plurality of individual streams by means of a manifold and fine tuning the flow rate of the individual streams by weir type diaphragm valves so the streams have identical flow rates. Each of the individual streams of dough are simultaneously cut into identical dough pieces by a rotating driver by a four-bar link mechanism.

Abstract: The agglomerator includes a disk-shaped annular chamber which is confined on its periphery by an annular perforated die, the outside of which is swept by knives. The annular chamber narrows towards its periphery, and at least one pressing blade rotates in the chamber. The blade has an active flank which forms, with the perforated inside wall of the perforated die, a revolving plasticizing chamber which narrows in the direction opposite to that of revolution. Plastics wastes in the form of chips, flakes or a fleece, resulting from precomminution, are fed axially into the annular chamber and are precompacted by the pressing blade in the revolving plasticizing chamber. The wastes are degassed and plasticized by autogenously controlled pressure and temperature conditions and are forced through the perforated die. The narrowing of the chamber toward the periphery results in increased throughput capacity without causing thermal damage to the material.

Abstract: An apparatus for producing a novel extruded composite confection product comprising slotted extrusion means arranged to extrude in succession at least four thin superimposed layers of a first confection material having a thickness of less than 5 mm. The apparatus further contains a take-off conveyor arranged to receive the output of the slotted extrusion means and spray nozzles arranged for spraying a second confection material between successive extruded layers of the first confection material.

Abstract: A screw type, polymeric material extruder with an elongated body having a cylindrical bore with a hollow screw in the bore, the screw having external and internal threads. A cylindrical body is within the internal threads, and the screw with the wall of the bore and with the cylindrical body forms, respectively, an external material flow chamber and an internal material flow chamber. The cylindrical body can have channels for heating fluid and for additives or dyes. The screw can have openings for feeding one material to a single extrusion head with one mouth by way of both chambers, or the chambers can be supplied with the same or different materials which are fed by way of the chambers to an extrusion head with two mouths for applying the latter materials separately.

Abstract: Pipe made from thermoplastic polymeric material and comprising a transversely corrugated outer wall and a smooth inner wall of constant diameter fusion welded to the inner crests of the corrugations of the outer wall is produced by an improved method involving simultaneous extrusion of two tubes, blow molding of the outer wall and fusion of the two walls while the inner wall is supported by an internal shaping and cooling mandrel. Even when the polymeric material is polyvinyl chloride, good fusion welds and lack of brittleness are achieved by the manner in which extrusion is carried out, control of the location at which the fusion welds are established, and the extrusion formulation. The finished pipe is characterized by the fact that, when the fusion welded areas have been cut for inspection, no line of demarcation between the materials of the two walls can be observed.

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: An article is provided having a plurality of straight spaced parallel extruded elements separated by a regularly undulated extruded element having an aspect ratio of at least about two, with undulations having opposed apexes on either side thereof, with apexes on one side of the undulated element being bonded to one of the parallel extruded elements and the apexes on the other side of the undulated element being bonded to the other of said parallel extruded elements.

Abstract: Forming thin-wall honeycomb structures using novel extrusion die; method of making the die. The die has feed holes feeding to slots of a primary extrusion grid. A secondary grid is milled between slots of the primary grid, and successive subsequent grids can be provided between previously milled slots (secondary grid, tertiary grid, quaternary grid), and so on. Extrudable material is fed to the die under pressure; the material flows through the feed holes longitudinally to the primary grid, when the material flows to subsequent grid or grids. The material emerges from the die face as a thin-walled honeycomb structure. It is then rigidified to prevent deformation.

Abstract: For producing a plastic film having a plastic fastener, with male and female interlockable profiles, and accessory strips, such as ribs and strips, in preparation of a reclosable plastic bag, there is provided a first forming die which extrudes the accessory strips, a separate second forming die which extrudes the fastener, a pair of nip rolls for press-bonding the accessory strips onto the surface of the film being fed in the vicinity of the first forming die, and a bonding roll for receiving the film with press-bonded accessory strips and the fastener from the second forming die placed onto the film surface such that the fastener is bonded to the surface of the film at the bonding roll by virtue of heat.

Abstract: A method of and apparatus for making the cable core of a telecommunication cable water-tight in the longitudinal direction, in which a filling material having a base of petroleum jelly is heated to a temperature above the drop point, is supplied under pressure to a filling head (5), is divided into a number of jets distributed over the circumference of the cable core, is passed through the filling head (5) with simultaneous conversion of the static pressure into kinetic energy and is injected through the outer layer of the cable core into the heart of the cable core, in which a reconversion of the kinetic energy into static pressure is effected and all the interstices and gaps between the single wires of the cable core are filled with the filling material.

Abstract: A discharge nozzle connected to the outlet of an extruder is built wedge-shaped in vertical longitudinal section and comprises a lower housing part and an upper housing part. The upper housing part is adapted to be swung open by being pivoted around a pivot axis, thus causing the nozzle to open. This opening of the nozzle occurs under the influence of a control and actuating member, as soon as a predetermined value of twisting moment, pressure or temperature is exceeded. The nozzle discharge opening has shutting locking bolts associated with it, adapted to shut off the discharge channels of the discharge opening of the nozzle. The discharge nozzle may be used to advantage for the continuous processing of electrode material.

Abstract: Apparatus for the simultaneous extrusion from an extrusion discharge station of multiple streams of a food product having fibers therein, from a single mass of the food product, where the desired product spacing between the streams at the extrusion discharge station is less then the greatest expected fiber length. Converging extrusion channels communicate at a channel entry station with a feed container which holds and directs the flow of the mass of food product, and the distance of closest spacing between the extrusion channels at the channel entry station is greater than the average expected fiber length. Bridging of food fibers between adjacent extrusion channels at the entry station is avoided by the large channel entry spacing, while the decreasing distance between the converging channels allows the food product streams at the extrusion discharge station to be spaced at a desired product spacing less then the greatest expected fiber length.

Abstract: This invention relates to manufacturing a grooved cylindrical core by extrusion. The manufacturing device comprises a single rotating integral die that has a tapered rear portion and a grooved cylindrical front portion. The tapered portion surrounds a stationary central member and guides the material from a main extruder. The front portion has a bore including linear or helical channels. The sealing problems are obviated since the tapered portion and the grooved portion make up an integral die. This die further enables to produce a grooved core perfectly gauged. According to another aspect, the threads or stripes between core grooves are identified by means of auxiliary extruders feeding predetermined die channels with extrusion materials having different colours. This stripe identification is particularly used for a core constituting the central strand of an optical cable.

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: The pelletizer comprises a chamber having a first side and a second side coupled to an extruder. A shaft extends through the first side into the chamber, a rotatable cutter assembly is mounted to the end of the shaft in the chamber and a die assembly is mounted at the second side of the chamber and has a die face facing into the chamber. The cutter assembly is positioned for rotation adjacent the die face. A prime mover is coupled to the shaft for rotating the cutter assembly. Plastic material is extruded through holes in the die assembly into the chamber as the cutter assembly is rotated to cut plastic streams coming out of the die assembly into pellets. A position control assembly automatically controls the position of the cutter assembly adjacent the die face. The cutter assembly has a plurality of cutting blades mounted thereon.

Abstract: Die for granulation presses, particularly for the manufacture of feed granulates, consisting of a cylindrical, cross-sectionally circular center element (1) having a plurality of granulating bores and connecting flanges (2,3) formed on the two ends of the center element, whereby the center element (1) and the connecting flanges (2,3) consist of separate elements. The center element (1) is made of wear-resistant steel and the flanges (2,3) are made of a highly durable steel. The connecting flanges (2,3) are heat shrunk onto the ends of the center element (1).

Abstract: On a known peat harvesting apparatus for mounting on an agricultural tractor comprising (a) a digging chain for insertion into and movement across a bog so as to form a groove, and (b) a peat extrusion press, a roller (107) is mounted above the digging chain (104) to direct harvested peat into the press and prevent the apparatus from clogging. A single drive transmission connects both digging chain (104) and extrusion press (105) to the tractor power take-off shaft. A macerating mechanism is provided in the extrusion press (105) which allows extrusions of relatively small cross section to be produced.

Abstract: The present invention concerns manufacture of cellular structures of thermoplastics material. In particular the invention concerns apparatus for use in the production of cellular structures of thermoplastics material comprising a supply and injection stage (b) for supplying the thermoplastics material (12), a die stage (c) through which the thermoplastics material supplied by the supply and injection stage is extruded to form the cellular structure (15), and a cooling stage (d) supplied in use with cooling fluid (4) for cooling the extruded thermoplastics material, the different stages being located one above the other and the apparatus further comprising a plurality of regularly spaced cylinders (7), each cylinder (7) having a lower part (10) of lesser diameter provided with heating means (11) and an upper part (8) of greater diameter, the bodies of the cylinders extending through the supply and injection stage and the upper parts thereof forming said die stage.

Abstract: A process for the elimination of wet surface cracking in dual extruded soaps including the steps of extruding two streams of plodded soap from a single cone dual extrusion nozzle, cutting the two streams of plodded soap at right angles to the extrusion axis to form plodder soap blanks or billets of a predetermined size, rotating the plodder soap blanks or billets 90.degree. on the extrusion axis, introducing the rotated plodder soap blanks or billets into a soap press having movable die elements so that the transverse faces of the plodder soap blanks or billets are in registry with the movable die elements, pressing the rotated plodder soap blanks or billets on their transverse faces to form pressed soap bars, and removing pressed soap bars. The process provides soap bars having an essentially laminar or parallel stress pattern.

Abstract: An extrusion die wherein extrusion passageways are provided with a working section having a smooth wall, and a controlled relief section having a rippled wall of similar effective diameter as the working section in order to control pellet expansion and other factors.

Abstract: In a face cutting apparatus having an extrudate feed means with an extrudate delivery end, a die plate and a cutter, an apparatus and method for controlling extrusion back pressure includes a die having a plurality of extrusion orifices through which a heat plastified material is adapted to be extruded, having a varying orifice density along the length of the die, a pressure sensing device for sensing the pressure adjacent the delivery end and an apparatus for moving the die relative to the delivery end in response to changes in the pressure adjacent the delivery end to align a die area of differing orifice density with the delivery end in order to adjust the flow rate of heat plastified material through the die and the extrusion back pressure.

Abstract: An extrusion nozzle arrangement for the production of a product such as a comestible, including a multiple nozzle arrangement through which there can be fabricated a multi-layered slab of a meat analogue product. A bacon-like appearance is achieved in that each extrusion nozzle includes a narrow, elongate bottom outlet orifice arranged to extend transversely above a continually moving horizontal conveyor belt. An insert strip is arranged within the nozzle above the orifice and coextensive with the length thereof, which includes projections extending across the path of flow of the solution extruded through the orifice, with such projections being positioned in a predetermined manner along the insert strip as to cause either restrictions or directional changes in the flow of the solution egressing from the nozzle orifice.

Abstract: A comestible extruding apparatus including a pressure chamber having an outlet, a hollow extrusion die journaled in the outlet, and a hollow seal force fit in the outlet and having a neck extending slidably into the hollow die, the neck and die combining to define a rotary seal for the comestible.

Abstract: Marbleized cookie dough pieces are formed by independently feeding different color doughs into a common extrusion die, in which a rotating impeller is located. The impeller lards portions of each dough into the flow of the other to produce a spiral pattern in the extrudate which is sliced to produce spirally marbleized dough pieces.

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: An improved pellet mill die is disclosed which has improved production efficiency without a corresponding loss in pellet quality or durability. The die comprises a compression side, a discharge side, and a plurality of die holes extending through the die. The die holes have a countersink on the compression side, and preferably at least a portion of die holes have a relief section to thereby define a working section of the die hole where the pellet is formed, and an effective thickness for the die holes which is preferably less than the distance between the compression and discharge side of the die. The die has a ratio of effective thickness to countersink diameter of at least about 1.8 to 1 wherein the countersink diameter is at least about 137% and preferably between about 137-159% of the working section diameter.

Abstract: The invention is relating to a press for compressing a powdery material to grains comprising a loosely arranged, rotatable annular, perforated mould supported and guided by a rotatable mould holder and by an axially displaceable supporting member which supports the mould at the end remote from the mould holder, the side face of a mould engaging the mould holder being urged by the supporting member with a given force against the mould holder in the operational position of the press in a manner such that during the operation of the press the mould is caught along by the mould holder owing to the force produced between the mould holder and the mould, whilst a rotatable roller is arranged in the mould whereby an uninterrupted channel is provided at least at the level of the side face of the mould engaging the drivable mould holder.

Abstract: Extrusion apparatus including rotary shell having plural circumferential rows of extrusion orifices and a stationary inner member, defining with said shell, circumferential channels communicating with said orifices.

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: The adaptor, which can be applied to the delivery end of the extruder barrel, comprises a plurality of ducts for feeding corresponding extrusion heads, radiating from a common manifold chamber and each provided with a butterfly valve for the mutual adjustment of the flows of thermoplastic material in the respective ducts. Preferably the ducts with their respective valves are identical to each other and the valves are adjusted to give extruded products which are identical to each other.

Abstract: An extrusion plate (1) for food paste, such as pasta, has a plurality of extrusion channels (3) each having an inlet section (4) and an outlet section (5) which are each of frustoconical shape having their bases meet to form a constriction (6). The discharge outlet is a larger diameter than the inlet and the cross-section of the channel (3) in the discharge section (5) increases in the direction of discharge of the pasta product so as to vary as a function of the stress associated with the pasta during its passage through the discharge section.

Abstract: For producing a hydrolized food product a stream of product is conveyed to a nozzle head (4) by means of a worm (1) and discharged via nozzles (8). Processed pieces of product are cut off from the stream of product one after another. The interrupter serving for this purpose displays a rotating element (5) that is arranged rigidly on the nozzle head side end of the worm (1) and rotates together with this latter. The rotating element (5) has recesses (10) that intermittently feed the stream of stock to the nozzle inlets (9) and sealing faces (12) that are arranged between the recesses (10) and seal the nozzle inlets (9) against the stream of stock between the feed phases. The edges (14) of the sealing faces (12), leading in the direction of rotation (13), guarantee the intermittent interruption of the stream of stock effecting cut-off of the pieces of product one after another.

Abstract: An improved pellet mill die is disclosed which has improved production efficiency without a corresponding loss in pellet quality or durability. The die comprises a compression side, a discharge side, and a plurality of die holes extending through the die. The die holes have a countersink on the compression side, and preferably at least a portion of die holes have a relief section to thereby define a working section of the die hole where the pellet is formed, and an effective thickness for the die holes which is preferably less than the distance between the compression and discharge side of the die. The die has a ratio of effective thickness to countersink diameter of at least about 1.8 to 1 wherein the countersink diameter is at least about 137% and preferably between about 137-159% of the working section diameter.

Abstract: Method for producing an extrusion die and resulting die for making a honeycomb structure provided with axially extending separate passages. Feed passages and interconnected pooling slots are formed in a metallic die body respectively from opposed end surfaces so as to be communicated with each other. A metallic plate is secured to the end surface provided with the interconnected pooling slots and formed in that plate to communicate with the pooling slots are narrower interconnected extrusion slots having the same shape and size as those of walls of the desired honeycomb structure.

Abstract: Method for producing an extrusion die and resulting die for making a honeycomb structure provided with axially extending separate passages. Feed passages and interconnected pooling slots are formed in a metallic die body respectively from opposed end surfaces so as to be communicated with each other. A metallic plate is bonded as by brazing to the end surface provided with the interconnected pooling slots and formed in that plate to communicate with the pooling slots are narrower interconnected extrusion slots having the same shape and size as those of walls of the desired honeycomb structure. Before securing the metal plate to the end surface, holes are made either in the plate or in the end surface, or both, to increase the bonding contact area therebetween.

Abstract: An apparatus for noodling a gelating dispersion which continuously gels and noodles the gelatin dispersion and supplies noodles of the dispersion into cold water in a washing tank, said apparatus comprising a means for supplying a predetermined quantity of said dispersion to an extruder at a predetermined pressure, said extruder comprising a plurality of supply nozzles that extend from a receiving chamber for said dispersion which are preferably made of a material having higher thermal conductivity than the walls of the chamber, and a washing tank to which cold water has free access, the supply nozzles of said extruder being so arranged as to be immersed in the cold water in said washing tank, to thereby promote gelation of said dispersion flowing down through each of said nozzles and to form firmer and stabler noodles.

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.

Abstract: Apparatuses and methods for simultaneously extruding two lengths of plastic tubing wherein each of said lengths includes alternate axial sections of materials having different characteristics (e.g., a harder material and a softer material). The apparatus includes two extruders which feed plastic extrudate to a dual die head having first and second dies for forming tubular lengths. Valves are operatively associated with each extruder for selectively feeding plastic extrudate from each extruder to either of the dies. The valves are intermittently operated so that during one cycle extrudate from the first extruder is fed to the first die and extrudate from the second extruder is fed to the second die, and during alternate cycles extrudate from the first extruder is fed to the second die and extrudate from the second extruder is fed to the first die. A cooling tank receives the tubular length from the dies for setting the plastic material.

Abstract: A method and mechanism for continuously making film with one or more fastener profiles thereon to be used for making reclosable plastic bags. The film is extruded through a T-shaped head having a thin slot die opening, and at least one fastener profile is extruded through a preform die block positioned so that the film and profile will engage and fuse to each other while the plastic is still in the state of fusion. The die block is mounted adjustably to be moved into different positions along the film head with the positions varying across the film width to control the location of the profile relative to the edges of the film or relative to other profiles on the film, with the width of the film also being controllable.

Abstract: An extrusion device for forming and shaping food product to a chosen cross section area and shape such as the filling for Chinese egg rolls, the product requiring mild compressive action for proper binding, and wherein mild shear forces acting on the product are effective to cause separation, breakup and damage. The apparatus comprises a housing with means for forcing the food product through the housing and in which the housing contains means defining a first section receiving a flow of the food product which initially shapes the flow into a predetermined shape and cross section, followed by a stabilizing section smoothly continuously transitioning from the first section and which has an outlet whose dimensions transverse to the longitudinal direction of movement of the product do not increase. By combining the first section with the stabilizing section food product is first shaped and then gently handled so that it binds together properly.

Abstract: A process and die are disclosed for preparing a foamed article of thermoplastic resin having a particular cross section configuration. The die of the invention is provided with a plurality of apertures in its face through which the resin is discharged. The apertures in the face of the die are distributed in a shape corresponding to the cross section of the foamed article which is produced. The apertures are further divided into a plurality of groups in which there is at least one zone which is void of apertures so that the apertures in the same group are actually restricted to a narrow band. The zone on the surface of the die which is void of apertures has a thickness more than twice the average distance between two adjacent apertures belonging to the same group.