Abstract: A buns making device includes a tube having an upper end for receiving stuff to be stuffed in the buns, a barrel disposed on an outer and lower portion of the tube, an opening formed in the barrel for receiving a strip of dough. The dough is formed into a column of dough and moved downward beyond the barrel, the stuff leaving the tube is contained within the column of dough. The column of dough is then cut and formed into the buns.

Abstract: A method for producing extruded and cut frozen confections (70) containing a first material (20) with particulates such as peanuts, and a second material (16) without particulates. Includes an extruder apparatus (10) with a first conduit (14) disposed to accept the first material, and a second conduit (18) disposed to accept the second material. And comprises diverter cylinders (22) and (24) opening into the conduits to cyclicly extract or inject the materials from the conduits, to produce intermittent flows within the inlet conduits (14) and (18). Next the materials alternately fill a transverse section of a confluence (42) to form a transversely layered extrusion (35). A conventional cutter is timed to transversely sever the transversely layered extrusion when a transverse layer of particulates free material is exiting.

Abstract: A multi-layer, multi-parison extrusion head in which nearly identical parisons are extruded from each extrusion station of the head when operated in an intermittent mode. Resin passages are provided within the extrusion head for supplying each of the resins to each extrusion station with the passages configured in a manner such that the ratio of resin volume for one resin in the passages for a given extrusion station compared to the volume of a second resin in the flow passages to the same extrusion station is the same for all extrusion stations while the volumes of resins feeding each station are not equal. As a result, a relatively simple configuration of passages is provided without requiring all of the passages to be of equal length.

Abstract: An improved apparatus for cutting and shaping a spherical body of a sticky material, composed of an assembly consisting of a number of rotary polygonal members for collectively forming an enclosure at the center thereof to cut and shape the material passing through the enclosure, each of the members with curved side surfaces being associated such that the enclosure is confined through the exposed part of the curved side surfaces of the polygonal members which pivotally swing to open and close the enclosure, and that the tip of each of the polygonal members tracks the exposed curved side surface of the adjacent polygonal member to scrape off the material adhering thereto, and each of the polygonal members having a uniform thickness that is thick enough to preclude the member from wedging into the material and that decreases toward the tip thereof, so that substantially spherical products can be continuously produced without generating any difficulty caused by the material adhering to the cutting members or by

Abstract: A method of manufacturing a multi-layer hollow article which consists of extruding a multi-layer parison having at least a chief resin layer, a sub resin (barrier) layer, and an adhesive resin layer located between the chief resin layer and the sub resin layer. The adhesive resin layer is made of the same essential material as the chief resin material and of the same quality. The sub resin layer is cut off by the use of a raised extrusion pressure of the adhesive resin when the multi-layer parison has been extruded a predetermined length. The parison is received in a mold so that the cut off sub resin (barrier) layer lies within the mold below pinch offs. Flash is produced as a result of the molding. The flash consists of the chief resin material or the chief resin material and the adhesive resin material. The flash is recycled as part of the chief resin material. Collecting a flash of a hollow article made by a blow molding and rebirthing the flash a rebirth chief resin material.

Abstract: Disclosed are resin stream modulation or shut-off control apparatus for use in a multi-layer extrusion die head for forming a multi-layer plastic resin parison tube suitable for blow-molding. The tube can be formed into articles such as containers. By use of the apparatus, the tube, and accordingly articles therefrom can have layers which vary in thickness or can have portions wherein layers are omitted, e.g., portions which become flash. In an apparatus herein, there is a resin channel having an exit orifice defining a merge area where a first resin stream merges with at least one second resin stream. A die member adjacent to the exit orifice can define the resin channel. Movable means and the die element are caused to intermittently abut or contact one another at the merge area to control, i.e., modulate or shut-off, the flow of the first resin. There is preferably no contact downstream of the merge area.

Abstract: A composite parison generally cylindrical in shape and including two or more plastic materials different in characteristic is formed. Using this composite parison, a hollow plastic product of any desired shape having a locally different characteristic, such as in softness, heat-resistance or wear-resistance, can be manufactured with ease, for example, by conventional blow molding.

Abstract: In a process and apparatus for the discontinuous production of preforms for producing hollow bodies from thermoplastic material, the wall of which is a laminate having at least first and second layers, by extrusion blow molding, the flow of material for forming the laminate is guided within the extrusion head which serves to produce the preforms, by suitable dimensioning of the volume of the duct system accommodating the laminate, such that regions of disturbed laminate occur in the end portions of the preform which are squeezed off the extruded preform by the blow molding mold as a waste portion.

Abstract: In a process and apparatus for the production of hollow bodies from thermoplastic material, having a wall of a laminate formed by at least first and second layers, by means of extrusion blow molding, a preform having a wall structure with a suitable number of layers is first produced in a batch-wise procedure using an extrusion head. The material required to produce the preform is guided in the extrusion head in such a way that disturbed portions of the laminate pass into the waste flash portions at the ends of the hollow body produced from the preform, so that the wall of the finished hollow body is devoid of disturbed laminate portions of that kind.

Abstract: Striped films of the invention can have two or more preferably polymeric layers, of which at least one continuous or discontinuous layer includes a pigmented resin. The striped film is produced by modifying conventional coextrusion dies to restrict the flow of a pigmented melt stream. The result is a striped film useful for identifying the contents of a package made from the film, tamper evidence, counterfeit protection and verification of properties. The stripes can be of one or more colors, and vary in width and spacing. The pigment can be a material visible in ordinary light, or a material invisible in ordinary light but visible in e.g. ultraviolet light.

Abstract: A nozzle device for extruding multiple synthetic resins as a resin composite, including a main extrusion flow passage having a main extrusion opening, a subsidiary extrusion flow passage having a subsidiary extrusion opening, at least a downstream portion of the subsidiary extrusion flow passage being disposed in the main extrusion flow passage, and an opening-closing member for opening or closing the subsidiary extrusion opening. The nozzle device has an auxiliary extrusion flow passage which has an auxiliary extrusion opening and at least a downstream portion of which extends through the main extrusion flow passage as it surrounds the downstream portion of the subsidiary extrusion flow passage. The auxiliary extrusion opening is positioned downstream of the subsidiary extrusion opening and the downstream end portion of the auxiliary extrusion flow passage has a tapered part.

Abstract: An improved apparatus for cutting and shaping a spherical material, which is composed of an assembly consisting of a number of rotary polygonal members for forming an opening at their center to cut and shape the material passing through the opening. Each of the members with curved side surfaces that are opposite each other is associated with each other such that when the members make a pivotal movement, the curved surface of each member slides over the curved surface of an adjacent member, and each of the members has a uniform thickness except for the area near the tip, where the thickness nonequiangularly decreases toward the tip so that substantially spherical products completely covered by an outer cover of a uniform thickness can be produced.

Abstract: Coextrusion apparatus for varying the inner profile of a generally tubular extrudate formed by a first stream of elastomeric material by an axially movable inner die ring which varies the size of an orifice and consequently the flow of a second stream of elastomeric material which is deposited on the inner surface of the tubular extrudate. A compensating ring is axially slidably mounted within the inner die ring and moves generally in an opposite direction to the movement of the die ring to compensate for pressure changes within the second stream of material caused by varying the size of the orifice, to provide an accurately controlled initiation and termination of the material. Pistons are formed integrally on the inner die ring and compensating ring and are located within annular fluid pressure chambers whereby the flow of fluid into the chambers will coordinate the movement of the die ring and compensating ring.

Abstract: Apparatus for producing flexible kink resistant tubing having one or more non-reinforced section(s) and one or more spirally-reinforced section(s). The apparatus includes a rotatable member having an extrusion passgeway for extruding a second thermoplastic material in a filament within a first thermoplastic material to form a reinforcing filament in tubing formed by the first thermoplastic material. The rotatable member is rotated at a predetermined velocity to form the reinforcing filament in a spiral or helical pattern in the wall of the tubing. A diverter valve is provided for selectively providing the second thermoplastic material so that filament reinforced and non-reinforced longitudinal sections of tubing may be formed without interruption. A method of producing such kink resistant tubing is also disclosed.

Abstract: A method and apparatus (10) is provided for producing vinyl siding (76) having aesthetically pleasing, wood-like striations embedded therein. Apparatus (10) includes processing structure (12) for processing topcoat compound and substrate compound at extruders (18, 20) respectively. Acrylic colorant is discharged from feeders (64, 66) into barrel (34) via adapter (72) and thereby mixed with the topcoat compound. The interval of discharge is four seconds every twenty seconds. Adapter (72) utilizes a water jacket to keep colorant cool prior to its introduction into barrel (34) where it experiences a temperature sufficient for melting, usually about 380.degree. F. Due to the interval of discharge and the twenty second period thereof, striations (82) are uniform and continuous in nature so as to simulate wood grain.

Abstract: An apparatus for manufacturing concrete roof tiles by extrusion includes a coating system adapted to be supplied with green concrete and to apply a continuous layer of green concrete onto a continuous strand of movable, positively advanced bottom molds (14), a compacting roll (25) and a smoothing member (35) immediately downstream thereof in the manufacturing direction for compacting and possibly shaping the basic green concrete layer passing therebeneath on the bottom molds. There is provided downstream--as viewed in the manufacturing direction--of the smoothing member (35) for the basic layer (17) and separated therefrom by a gap (40) extending transversely to the manufacturing direction, at least a further smoothing member (45) for another layer, especially a cover layer (18), to be applied onto the basic layer (17). The material for said other layer is supplied under pressure through the gap (40).

Abstract: An apparatus for shaping and arraying spheroidal bodies is provided. The apparatus comprises a means for continuously supplying a cylindrical body comprising an outer material and a filler material, a cutter assembly having cutter members circumferentially disposed to form a central opening, and an arraying device having an endless belt for transferring a tray. The cutter members slide inwardly to close the opening, and thus the part of the cylindrical body inserted in the opening is shaped into a spheroidal body. An endless belt device is disposed beneath the cutter assembly and the belt is driven intermittently and forwardly and the frame of the endless belt device is moved back and forth in a transverse direction. By moving the belt and frame of the endless belt device so that predetermined positions of its belt are in turn moved to a position directly beneath the opening of the cutter assembly, the spheroidal bodies drop on each predetermined position on a tray placed on the belt.

Abstract: Apparatus for selectively controlling the flow of at least three melt material streams through the nozzle of a machine for injection molding multi-layer plastics articles. The nozzle has, for each stream, a flow passageway terminating at an exit orifice. Sleeve means having an internal axial material flow passageway, communicate with the central channel and with one of the flow passageways and are movable axially and/or rotationally to block and unblock at least two orifices. Each flow passageway can include material flow directing means for balancing stream flow around the passageway and its exit orifice, and a tapered portion adjacent its orifice. Preferably, the orifices are fixed. Means can pressurize melt material in a flow passageway between the flow directing means and the associate orifice so that the start of flow of the material through the orifice is substantially uniform thereabout.

Abstract: An apparatus for manufacturing a hollow plastic product is provided. In accordance with one aspect, into a mold half having a tubular groove portion and a projecting groove portion which projects outwardly from the tubular groove section is supplied a parison into the tubular groove portion and a clump of molding material into the projecting groove portion. When blow molding is carried out by introducing a pressurized gas into the parison, the clump becomes integrated with the parison thereby providing a hollow plastic product of unitary structure. In accordance with another aspect of the present invention, a parison extrusion nozzle is provided with at least two passages each of which is connected, preferably through a valve, to a corresponding dispensing unit for dispensing a desired molding material. A control unit is provided as connected to each of the dispensing units to control the supply of molding material so that there is obtained a parison having regions of different molding materials.

Abstract: A process includes first preparing an adhesive composition containing electron beam-curable PSA polymer matrix, fillers and solvent. The composition is introduced and conveyed through a twin screw extruder. In the extruder, solvent is removed in one or more solvent removal units, and a solvent-free composition is extruded as the carrier layer. Skin layers may be co-extruded with the carrier layer.

Abstract: A steam venting extruder feeder is provided for gravity feeding of flowable solid materials into a food extruder downstream of the first normal first zone feed port. The steam venting extruder feeder feeds the material down a tube while simultaneously venting steam from within the extruder around the periphery of the feed tube inside an outer tube in which compressed air is forced to assist in the flow of steam and pulls air in with the feed material preventing steam condensation and build-up in the feed tube.

Abstract: An article such as a length of plastic tubing is integrally formed by melt extrusion and having opposite ends which in turn are provided with different flexibilities. The apparatus and extrusion method by which such articles are forming in a running length includes a gear assembly rotatable between at least two alternate positions whereby two different but mixable resins are alternatively extruded as product.

Abstract: An extrusion molding equipment for a multi-layer parison which includes an operation position detecting device for detecting an operation position of an accumulator extruding an layer of resin material invisible from outside the parison. A pressure detecting device is provided for detecting pressure of the inner resin material in an inner resin conduit. An extrusion amount control device for the inner resin material is also provided for controlling an extrusion amount of the inner resin by the use of a signal indicating the operation position from the operation position detecting device, and a signal indicating the pressure from the pressure detecting device.

Abstract: A device for feeding an extrusion head for plastic material includes a main extruder connected to a main die for extruding a continuous main flow of material, and an auxiliary feed mechanism associated with the main die and selectively controlled to cover the outer exit flow of the main die with a surface layer. The auxiliary feed mechanism continuously conducts two auxiliary flows, a first flow forming the surface layer and the second flow being mixed with the main flow. An invertor valve permits selective exchanging of the two auxiliary flows such that the second flow can cover the main flow and the first flow can be mixed with the main flow.

Abstract: The invention provides a method for encapsulating extrudable materials within an extruded stream of another extrudable material. The produced product is an extruded material that contains one or more different materials embedded within the first material. The boundaries between this first encapsulating material and the material or materials thus encapsulated are well-defined and distinct. In the preferred embodiment, the encapsulated and encapsulating materials are plasticized thermoplastic resins. A stream of the encapsulating material is formed in a first extrusion channel. A plasticized stream of the material to be encapsulated, coated by a coextruded layer of the encapsulating material, is simultaneously formed and travels through a second extrusion channel. At any selected time, a cross-sectional segment of the second stream may be removed from its stream and replaces a similar cross-sectional portion of the stream removed from the first channel.

Abstract: A process for coextrusion blowmolding of multilayer polymer articles, wherein a multilayer parison is extruded through a die, introduced into a mold, and blowmolded, the flow of multilayer plastic material being periodically interrupted, and additional plastic material being injected into the extrusion die at timed intervals, so that this additional material forms portion of the parison which later are trimmed from the molded article and reprocessed for reuse.

Abstract: In a method of operating a co-extruder, a co-extrusion die used during a co-extrusion mode of operation is replaced by a simple extrusion die which is used during a simple extrusion mode of operation. The co-extruder has a pair of juxtaposed outlets one of which is blocked by the simple extrusion die during utilization thereof.

Abstract: A method is providing for making a thin-walled catheter of the type having a distal end adapted to be formed into a curve and guided through branching blood vessels or the like so that the catheter is provided with a two-layered tubular body portion having a rigid inner sheath and a flexible outer sheath, which may be radiopaque. The catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while providing excellent liquid flow rates therethrough and excellent strength properties. The tip portion is fuseless with respect to the rest of the catheter, the tip portion being an integral extension of the flexible outer sheath that is formed over a gap between lengths of the rigid inner sheath.

Abstract: An apparatus for shaping a spherical body consisting of dough crust and a filling is provided. A continuously fed cylindrical body, consisting of dough crust and a filling, is constricted by at least three slidable members which form an opening or closes it. The members slide on each other so as to constrict the cylindrical body. The contact area of the members with the surface of the cylindrical body gradually decreases as the opening is closed, thereby constricting the cylindrical body and shaping the spherical body.

Abstract: Apparatus for forming filled dough products comprising: piston extruders for pumping dough and filling to measuring devices which extrudes external dough tube with internal filling through a die head so that part of the dough tube of one item is extruded without filling, a twisting device for turning just extruded item around its longitudinal axis and twisting the empty part of the dough tube, and pinching device for forming closing and separating ends of the items.

Abstract: To produce and package portions of spreadable food products, for example differing types of processed cheese, in multiple layers, the layers are shaped individually in shaping compartments by keeping them separate and, while being ejected, they are guided individually to the bottom of a pre-shaped shell and substantially all traces of spread are eliminated from the shaping compartments.The apparatus comprises a unit for the separate metering of each group of layers of the same nature (7), for the separate and alternate shaping of the layers, for the ejection and guidance of the layers into the shell (5, 6); units for applying a tear strip for quick opening (2, 3) and for stamping a shell (4) upstream of the metering unit (5) and, downstream thereof, units for applying lids (11), for following back the edges (12), for fixing the edges (13) and for removing the packaged portion (14).

Abstract: Method and apparatus for manufacturing a food product in which an edible filling material is completely enclosed in an edible coating material, comprising outer, intermediate and inner spaced apart concentrically arranged extrusion conduits; means for extruding the coating material continuously through the channel between the outer and intermediate conduits to form a tube of coating; means for extruding the filling material intermittently through the channel between the intermediate and inner conduits so that it forms a filling within the tube of coating; means for mechanically isolating the filling material, on interruption of extrusion, from the filling within the tube of coating; means for extruding further coating material alternately to the extrusion of the filling material, through the inner conduit so that it flows within the tube of coating at the rear end of the filling; and means for cutting the extruded tube cross-sectionally between positions where filling is located.

Abstract: Multi-colored detergent bars are manufactured by adding a visually distinct liquid to one part of the detergent feedstock before it enters the refiner stage.

Abstract: A mixing and extruding nozzle for two reactant components has a housing formed with a mixing chamber, a pair of parallel and oppositely directed faces flanking and turned away from the chamber, respective injection passages having inner ends opening into the chamber and outer ends opening at the respective faces, and respective outwardly open grooves in the faces offset from the passages. A valve-type rocker pivotal relative to the housing about an axis perpendicular to and traversing the two faces and offset from the passages and grooves has two like halves each formed with a face confronting the respective housing face and a feed passage opening at the respective rocker face offset from the axis.

Abstract: Disclosed is a hand powered, crank operated structure whose principal moving component is a horizontal and generally cylindrical barrel having built thereon a pair of stub loading extending tubes from one side of the barrel. These stub tubes are disported in parallel and side-by-side fashion, and one of them, for instance the dough tube, lies to the left, closer to the discharge end of the barrel than the other, the meat or filler tube. The barrel is allowed to rest on the horizontal base of the machine's framework with its solid end, opposed to the discharge end, supported by and extending through an end wall of the framework and connected to a hand lever.

Abstract: A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position.

Abstract: An apparatus for manufacturing food products, such as knoedels, picnic eggs, knish etc., in which core materials are wrapped with crust materials. The apparatus comprises an outside cylindrical assembly and an inside cylindrical assembly, each assembly having a substantially horizontal axis, further comprises an annular passageway for crust materials which is formed between the opposite surfaces of cylindrical body portions of the two assemblies. Each assembly comprises an outer tube and inner tube which are arranged so that the former abuts the latter and they can periodically rotate in the opposite directions about their common axis. The outer and inner tubes of said outside assembly are provided at the respective body portions thereof with inlet and outlet apertures for the crust material. The outer and inner tubes of said inside assembly are provided at the respective body portions thereof with outlet apertures for the crust material.

Abstract: An extrusion head has at least two preferably co-axial tubes, with an outer tube enclosing at least one inner tube. The end of the inner tube terminates in a flexible sleeve or tube which is supported by a plurality of hinged fingers distributed uniformly around the periphery of the inner tube. Dough is driven under pressure through the outer tube and filling is driven under pressure through the inner tube. When an extrusion valve is closed at the end of the outer tube, the back pressure of the dough closes and folds the flexible sleeve, against the supporting fingers which it surrounds, thereby closing the filling tube and forming a coating of dough for the outer end of the next food product. When the extrusion valve next opens, the coating of dough and the filling are pushed out to extrude and form the outer end of the next encrusted food product.

Abstract: An extruder coating die for depositing protective cushions on the plastic jackets of hoses, tubes or the like. The extruder consists of a fixed part and of at least one movable part which can be adjusted between two end positions and combines the following features:(a) the movable part (8b) is rotatable with respect to the fixed part (8a);(b) the fixed and the movable part are provided with ray-shaped inwardly extending arms of which the inside ends extend as far as the hose or tube surface at the jacket material; and(c) the arms of the movable part (8b) are of widths such that in one of the end positions of the movable part they bare the free spaces between the arms of the fixed part and in the other position they cover them.

Abstract: A process and apparatus for producing a mixture of polymeric phases wherein a plurality of fluid material having different phases are fed into a phase programmer, and said phase programmer separately and sequentially injects pulses of said polymeric materials into a reservoir. The material may be passed through an extrudate shaping device so as to provide a moasic structure comprising an agglomeration of a plurality of said polymeric phases, each of which phases are substantially non-continuous in any dimension and which are interrupted with substantially no intermixing between phases.

Abstract: An injection-molding apparatus has a nozzle extending along an axis and formed with an axially forwardly opening outlet, an annular port fixed immediately axially behind or upstream of the outlet, and a central axially forwardly opening port axially fixed behind the annular outlet. Respective plastifiers for feeding respective plastified synthetic resins, normally thermoplastics, are connected to the respective ports. An axially displaceable valve body in the nozzle is displaceable from a fully forward position blocking both of the ports, through a partially back position blocking only the central port, to a fully back position clear of both of the ports. Thus in the fully forward position no resin can enter the nozzle, in the partially back position resin can enter the nozzle only from the annular port, and in the fully back position resins can enter the nozzle through both of the ports.

Abstract: An extruder has a nozzle from which it extrudes a strand formed of a mixture of wood chips and a synthetic-resin binder into a passage formed by a plurality of transversely and longitudinally movable walls. Opposite walls are urged transversely inwardly by respective hydraulic cylinders to compact and densify the strand as it cures, and other cylinders urge the walls upstream toward the nozzle with a force slightly smaller than the extrusion force. Thus as the extrusion force exceeds the opposite longitudinal biasing force the walls will move downstream with the strand, to return upstream between advance steps of the strand.

Abstract: Process for the production of alveolar modules comprising rows of parallel channels, certain of which issue onto the sidewalls of the module, the process consisting of producing the module by extrusion using at least two independent systems each producing rows of identical channels, whereby the formation of one of the systems is interrupted when the row of channels being produced is to issue onto the sidewalls of the module.The apparatus for performing this process comprises a first extrusion system incorporating first extrusion material supply means and a first spinneret complementary to the cross-section of the rows of channels issuing onto the sidewalls of the module and a second extrusion system incorporating second extrusion material supply means and a second spinneret complementary to the cross-section of the other rows of channels, the first and second supply means being controlled independently of one another.

Abstract: An extrusion die for forming a multi-passage, elongated tubular member having transverse passageways formed between adjacent longitudinally extending passageways during the extrusion of the tubular member.

Abstract: Apparatus for the extrusion of a flowable mass onto a conveyor, comprises first and second cylindrical containers. The first container is disposed for rotation about a longitudinal axis and includes first passages for depositing the flowable mass. The second container includes a wall portion which contains a plurality of second passages. The wall portion is disposed against the first container, the latter rotating relative to the second container so that the first and second passages are periodically aligned to enable the flowable mass to be deposited onto the conveyor. The first and second containers define a gap therebetween which creates a negative pressure to suck-in excess mass from the outer periphery of the apparatus. A spatula is provided to push the mass into the gap.

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: Extrusion apparatus for production of a shaped article comprising one or more filling materials enclosed in a coating material. Included in the apparatus are inner and outer conduits through which the materials are extruded toward an iris valve adjacent the terminal portion of the outer conduit. An inner conduit preferably terminates within the outer conduit at a distance from the iris valve equal to the distance between outer surface of the inner conduit and inner surface of the outer conduit. Operation of the iris valve both determines the length of the article and the shape of forward and rearward ends of the article.

Abstract: An apparatus for the production of marbled articles by injecting into the injection molding die of an injection molding machine two confluent streams of plastic raw material of different hue or color which are supplied from two injection units, via separate pulsation channels which open into a common nozzle channel, just ahead of the mold cavity. The plastic raw materials flowing in the two pulsation channels are subjected to an intermittant and alternatingly pulsating advance by means of feed thrust pulsation controls which generate an intermittent advance of the plastification screws of the injection units. At the junction between the two pulsation channels may be arranged a pulsation chamber with oppositely oriented material entry ports which are alternatingly closed by a reciprocating pulsating element which moves with the pulsating plastic streams.

Abstract: A process for extruding patterned sheets or panels of differently colored thermoplastic synthetic resin compositions which include the steps of distributing additional color compositions outside of an extrusion duct of a basic color composition over a number of individual feed channels and introducing the additional color compositions at right angles to the direction of flow of the basic color composition into the interior of the stream of the basic color composition at locations over the width and thickness in an initial flow zone via said channels.

Abstract: The present invention is concerned with the provision of an apparatus for the metering of a viscous fluid, and more particularly to a metering device for controlling the advance of margarine feedstock into a crystallization chamber for molding into print forms by employing a first and second positive open and closure valve mechanism correspondingly operated by independent drive mechanisms.