With Upstream Screen Or Perforated Plate For Straining, Homogenizing, Or Mixing Material To Be Shaped Patents (Class 425/197)
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Patent number: 4343068Abstract: A method and apparatus are disclosed in which mold parts are provided for defining a mold opening and in which a foraminous member is provided with apertures communicating between an upstream side and downstream side of the member. The foraminous member is disposed with the downstream side adjacent the mold opening. Pressurized food material is forced from the upstream side of the foraminous member through the apertures to the downstream side of the foraminous member and into the mold opening as discrete extrudate masses which together define a packed array forming the patty. At least some of the mold parts are then moved away from the foraminous member to expose the downstream side of the foraminous member and a plurality of rigid probe members are inserted into at least some of the foraminous member apertures from the downstream side to dislodge tissue fibers that may have lodged in the upstream side of the member.Type: GrantFiled: January 19, 1981Date of Patent: August 10, 1982Inventor: James A. Holly
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Patent number: 4332541Abstract: 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.Type: GrantFiled: November 20, 1980Date of Patent: June 1, 1982Assignee: Hermann Berstorff Maschinenbau GmbHInventor: Dietmar Anders
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Patent number: 4321228Abstract: 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.Type: GrantFiled: March 25, 1980Date of Patent: March 23, 1982Assignee: Wavin B.V.Inventor: Johan de Kok
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Patent number: 4318677Abstract: The invention relates to a small volume outlet apparatus for multiple shaft screw machines for highly viscous materials at the discharge end of a multiple shaft screw having a sieve changing device arranged in it.Type: GrantFiled: August 21, 1979Date of Patent: March 9, 1982Assignee: Bayer AktiengesellschaftInventors: Martin Ullrich, Heinz Gemperlein
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Patent number: 4304745Abstract: Multi-colored detergent bars can be manufactured by extruding detergent material through a multi-apertured plate in a detergent plodder and injecting a visually distinctive liquid at the plate. The liquid is distributed throughout the detergent material in the form of striations as the material is compressed in the extrusion cone.A specific form of external striping and the use of increased amounts of injected liquid can be achieved by having some of the apertures positioned peripherally on the plate. These apertures form `walls` of extruded material which constrain the liquid into stripes.The manufactured bar has a distinctive appearance because the external striations are wider than the internal striations.Type: GrantFiled: March 31, 1980Date of Patent: December 8, 1981Assignee: Lever Brothers CompanyInventors: David A. Alderson, Raymond C. Stott
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Patent number: 4285648Abstract: A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.Type: GrantFiled: November 16, 1979Date of Patent: August 25, 1981Assignee: Societe Industrielle de Liaisons Electriques SilecInventor: Robert Jocteur
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Patent number: 4280907Abstract: A separating device for separating materials from each other having different melting points, particularly a mixture of plasticized and non-plasticized solid material, includes a housing having a bore and a plurality of successively arranged disc within the bore. The discs are located relative to each other and are of such configuration as to define screening gaps. The plasticized material is separated by passage through the screening gaps as the mixture including substantially all of the solid material passes through the bore.Type: GrantFiled: August 14, 1979Date of Patent: July 28, 1981Inventor: Wilhelm Haberle
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Patent number: 4265756Abstract: A change device for sieves used for filtering plastic materials. The change device comprises a sieve holder having a bore for the throughflowing material and a slot extending transversely thereto, in which there are sealingly retained in work position sieve supports or carriers containing sieves. By means of a work cylinder it is possible, without interrupting the transport of the material which is being processed, to eject and replace the contaminated sieve by a new sieve. The rapid change device is particularly suitable for installation in an extruder for fabricating rubber hoses for automobile tires, the installation of such rapid change device advantageously being accomplished between the extruder and the injection head.Type: GrantFiled: December 13, 1979Date of Patent: May 5, 1981Assignee: Schiesser AGInventor: Walter H. Schiesser
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Patent number: 4260350Abstract: An improved replaceable filtration unit for high viscosity fluids, of the self sealing semi-disposable type and having inert granular material supported by a screen within a housing, wherein the improvement comprises having the screen's rim swaged into the housing, preferably with an interference fit within the range 0.005 to 0.015 inches. The invention improves the performance of packs used to filter and extrude molten polymer into shaped articles.Type: GrantFiled: April 16, 1980Date of Patent: April 7, 1981Assignee: Fiber Industries, Inc.Inventor: Luther O. Russell, Jr.
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Patent number: 4259277Abstract: This invention provides a method and apparatus for injecting an additive into a stream of homogenized plastics material. The apparatus includes a homogenizing means such as a screw conveyor for the plastics material and at least one injector for injecting an additive, usually a colorant, into the boundary layer only of the homogenized plastics material prior to the latter being subjected to mastication in a gear pump. The additive is injected into the plastics material at such a position in the boundary layer that as the material passes through the gear pump the additive is mixed substantially wholly with the boundary layer of plastics material and for this purpose the injection of additive is at a position such that it passes through the gear pump in the region of the intermeshing gears of the pump.Type: GrantFiled: October 16, 1978Date of Patent: March 31, 1981Assignee: The General Engineering Company (Radcliffe) LimitedInventor: Alan H. Hill
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Patent number: 4257901Abstract: A filter assembly for an extrusion apparatus comprises a stationary filter having a flat, hard surface and slidable means having a plurality of apertures for both accumulating filtered debris and cleaning the filter surface when the debris is removed by sliding a clogged slide aperture out of position while replacing it with a clean aperture.Type: GrantFiled: August 13, 1979Date of Patent: March 24, 1981Assignee: Western Electric Co., Inc.Inventor: Willard E. Rapp
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Patent number: 4234531Abstract: A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.Type: GrantFiled: February 1, 1979Date of Patent: November 18, 1980Assignee: Societe Industrielle de Liaisons Electriques-SilecInventor: Robert Jocteur
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Patent number: 4219318Abstract: In an apparatus for preparing fresh food paste of the type including a vessel having a bottom and forming a mixing and kneading chamber, the vessel having a closed side wall of circular cross section which is symmetrical about an axis passing centrally through the chamber, a rotatable member mounted within the chamber for rotation about the vertical axis, a drive for rotating the member in a given direction, blades located within the chamber and operatively connected to the rotatable member in a position extending away from the vertical axis, wherein the improvement comprises: the blades including a kneading blade extending into close confronting space relation with the vessel side wall and having a lower surface with leading and trailing edges defined by the given direction of rotation, the trailing edge having a normal position adjacent the vessel bottom and being moveable away from the bottom and the leading edge being positioned at a substantially greater distance from the bottom than the normal positionType: GrantFiled: February 7, 1979Date of Patent: August 26, 1980Inventor: Alfredo Cavalli
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Patent number: 4214861Abstract: A pourable substance is introduced into a container having a perforated bottom which defines, together with a mold, forming space which is to be filled with the pourable substance. The forming space has a configuration substantially corresponding to that of the preform to be made, and the pourable substance passes through the perforations of the bottom of the container and is distributed throughout the forming space, owing to vibrations to which the perforated bottom of the container, either alone or together with the container, is subjected. The pourable substance is compacted within the forming space due to the vibration of the perforated bottom so that the preform can be subsequently taken out of the mold and compressed elsewhere into a profiled article, or the profiled article can be produced from the preform directly in the mold.Type: GrantFiled: May 10, 1978Date of Patent: July 29, 1980Assignee: Werzalit-Pressholzwerk J.F. Werz Jr. KGInventors: Edmund Munk, Hermann Henke
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Patent number: 4174198Abstract: A foreign material removing device in a synthetic resin reclaiming machine including an extruder having a screw shaft, a filter cylinder connected to the extruder, a resin filter mounted within the filter cylinder so as to form a resin chamber therebetween, a scraper shaft positioned within the filter cylinder and including projected strips as scraper which protrude aslant to the axis of the scraper shaft such that the strips contact the inner surface of the filter and interconnect with the screw shaft, a body fixed to the filter cylinder which includes a first guide hole, one end thereof being connected to the inside of the filter cylinder, an ejecting port, and a second guide hole disposed in an orthogonal direction with respect to the axis of the scraper so as to connect the first guide hole to the foreign material ejecting port further including a plurality of resin passages communicating with the resin chamber, a plurality of dies fixed to the body which include connecting passages for ejecting resin andType: GrantFiled: September 8, 1978Date of Patent: November 13, 1979Assignee: Nihon Repro Machine Kogyo Kabushiki KaishaInventor: Tomoo Kinoshita
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Patent number: 4163640Abstract: A die for extruding a honeycomb structural body capable of preventing the deformation of the honeycomb structural body when the honeycomb structural body is extruded.Type: GrantFiled: May 30, 1978Date of Patent: August 7, 1979Assignees: NGK Insulators, Ltd., Institute of Technology Precision Electrical Discharge WorksInventors: Noboru Higuchi, Shoji Futamura
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Patent number: 4150932Abstract: Aramid fiber reinforced hose having the fiber in discrete particles extruded with the elastomer to provide orientation of the aramid fibers in two oppositely helical overlapping directions. A strainer plate is located within the extruder that has a series of apertures on concentric circles with each series of apertures extending through the plate at opposite helical directions.Type: GrantFiled: April 18, 1977Date of Patent: April 24, 1979Assignee: The B. F. Goodrich CompanyInventor: Sharad R. Moghe
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Patent number: 4123209Abstract: A briquetting plant for hot briquetting particulate matter, such as mill waste containing a material that softens when heated, such as iron oxide, which includes a low temperature tumbler type heat exchanger, an intermediate temperature tumbler type heat exchanger, a fluid bed furnace and a compactor, with the feed material being fed therethrough in succession. The briquettes produced by the compactor are first fed from the outlet of the compactor into the intermediate temperature heat exchanger, for liberation of heat therein, separated from the feed material by a screen at the outlet of the intermediate temperature heat exchanger and from such screen transported into the low temperature heat exchanger for further imparting of heat to the feed material. A second screen is provided at the outlet of the low temperature heat exchanger for separating and discharging the briquettes in relatively cooled form.Type: GrantFiled: April 18, 1977Date of Patent: October 31, 1978Inventor: James E. Moore
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Patent number: 4051574Abstract: A device for use with a sausage stuffer having a first tubular conduit forming a flow passage for sausage mix and a laterally orientated second tubular conduit intersecting and disposed generally normal to said first conduit and laterally offset therefrom, a member positioned within the second conduit and extending entirely across the flow passage and laterally outwardly thereof into said second conduit, said member being provided with a plurality of slotted openings of reduced cross-sectional configuration to entrap undesirable hard particles within sausage mix such as bone, gristle, and the like so that such may be subsequently removed by way of said second conduit.Type: GrantFiled: October 26, 1976Date of Patent: October 4, 1977Assignee: Gaspar's Linguica Company, Inc.Inventor: Tobias A. Gaspar
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Patent number: 4025434Abstract: A screen changer mounted between a flowable plastic extruder and a die has a clamp frame movable rectilinearly across the extrusion passage by fluid piston and cylinder means to successively position one of four screen blocks across the passage. A used block is removable from the frame at one end, whereupon latch mechanism retains three blocks while the frame retracts to receive a fresh block. Each block contains a filter recess, a purge recess and a pre-fill groove in the upstream face, so that the incoming block is pre-filled with plastic and purged while moving into position across the passage.Type: GrantFiled: October 6, 1975Date of Patent: May 24, 1977Assignee: Bolton-Emerson, Inc.Inventor: John Mladota
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Patent number: 4017225Abstract: An apparatus for the production of injection-molded synthetic-resin bodies having core portions and skin portions of different densities wherein a blowing agent is introduced into the core material to form macroscopic bubbles or cavities therein within the mold and under the molding conditions so that the expanding body of core material presses the skin material against the walls of the mold. The core material is injected coaxially with the skin material but under conditions such that expansion under the effect of the macropore-producing blowing agent does not occur to any significant extent until the core material is within the mold. This is a division of application Ser. No. 507,465, filed Sept. 19, 1974.Type: GrantFiled: April 29, 1975Date of Patent: April 12, 1977Assignee: Societa Internazionale per lo Sfruttamento di Brevetti S.A.Inventor: Robert Hanning
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Patent number: 4005962Abstract: An extruding machine for the extrusion of plastic or other similar materials in variegated forms comprising a series of bar members spaced from one another, wherein said bar members form by their interstitial spaces the extrusion chambers; said bar members having heating elements integrally disposed therein for the purpose of heating, to an amorphous state, the plastic material placed on and contacting the upper surface of said bars for extrusion into a receptacle beneath the bars.Type: GrantFiled: December 4, 1974Date of Patent: February 1, 1977Inventor: Frank R. Kobee
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Patent number: 3971721Abstract: A filter system includes a path of flow for a flowable material to be filtered and a continuous filter element moveable transversely to such flow. The continuous filter element passes through a channel of predetermined and uniform cross section and carries a plurality of seal members at intervals along its length, each seal member being of the same cross sectional size and shape as the channel so as to form moving seals within the channel. The filter member is moved continuously or on demand through the channel, presenting a continuously renewed filter area to the flowable material. The new filter system is illustrated for filtering in the plastics industry.Type: GrantFiled: December 31, 1974Date of Patent: July 27, 1976Inventor: John E. Fogarty, Jr.
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Patent number: 3954365Abstract: An apparatus for the production of extruded profiles of foamed thermoplasts consisting of an extruder having an extrusion screw or helix and a form-giving extruder head having a flow channel there-through, at least part of the length of said flow channel being divided by separating walls having a thickness of 0.2 to 3 mm arranged in the axial direction into individual channels of such a length and cross-section area whereby each individual channel has a nozzle coefficient k of from 0.1 to 2mm.sup.3, characterized in that thorn-like pins are inserted into some of the individual channels; as well as the process of extrusion.Type: GrantFiled: October 31, 1974Date of Patent: May 4, 1976Assignee: Wacker Chemie GmbHInventors: Hansjochen Barth, Johann Bauer
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Patent number: 3940335Abstract: A process and apparatus for filtering substances by introducing a filter band across a passageway through which the substance flows, the filter being passed through inlet and outlet ports sealed to prevent leakage therefrom for example by thermal solidification therein of the substance being filtered or any other suitable sealing substance to form sealing plugs in the ports, and the filter being advanced to locate a fresh part thereof across the passage by supporting the filter upon a reciprocable backing support, moving the backing support in a direction to advance the filter under conditions such that the filter moves with the backing support, and subsequently retracting the backing support under conditions such as to prevent movement of the filter with the backing support.Type: GrantFiled: August 17, 1973Date of Patent: February 24, 1976Inventor: Peter Gabor Kalman
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Patent number: 3938924Abstract: An apparatus for the continuous filtration and flow of molten thermoplastic polymer from a melt source to a shaping apparatus. The apparatus is characterized by the employment of a melt reservoir whose level is regulated by a level control means. Melt flow to the shaping apparatus is regulated by the level control means which controls the flow rate from the melt source as a function of the level in the melt reservoir.Type: GrantFiled: March 28, 1974Date of Patent: February 17, 1976Assignee: Celanese CorporationInventors: Richard M. Abella, Keith D. Dodson, Jerry G. Richardson
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Patent number: 3932102Abstract: A pipehead for an extruder includes a die body and a die pin having a central bore, a plurality of radial ports, and a corresponding plurality of helical grooves with a region of decreasing depth. The helical grooves are located at the blind end of an annular channel having a constricted area and terminating in a die opening. The channel is defined by the die body and the die pin. A breaker plate having a multiplicity of openings may be provided downstream of the grooves to generate a multiplicity of filament-like streams that are subsequently recombined as they pass through the constriction of the annular channel. The diameter of the annular channel generally decreases axially along the head. The pipehead is provided with internal and external heating means for temperature control.Type: GrantFiled: November 1, 1974Date of Patent: January 13, 1976Assignee: Koehring CompanyInventor: Larry A. Rosenbaum