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| Number | Title | Issue Date |
| 7695183 | Static mixer apparatus for impregnating a polymer melt with a fluid expanding agent or additive The apparatus is provided for impregnating a melt of polymer with a fluid working medium, such as, an expanding agent or an additive. Impregnation is carried out for the purpose of manufacturing foamed shaped parts using an injection molding machine. The impregnatin... | 04/13/2010 |
| 7322739 | Sparging device for adding a processing fluid to a foodstuff A sparging device (10) includes a number of sparger or screen passages (14) each extending from a respective passage inlet to a respective passage outlet. The sparging device (10) further includes a fluid chamber (25) that defines a chamb... | 01/29/2008 |
| 7303706 | Device for producing expanded plastic moulded parts in an injection moulding process, using compressed physical expansion fluids The manufacture of foamed polymer trim parts making use of physical blowing agents requires the diffusion and sorption of the blowing agent in the polymer melt. Said diffusion and sorption are achieved by intensive mixing. Therefore a statical mixing device is enclo... | 12/04/2007 |
| 7093973 | Sparging device and method for adding a processing fluid to a foodstuff A sparging device (10) includes a number of sparger or screen passages (14) each extending from a respective passage inlet to a respective passage outlet. The sparging device (10) further includes a fluid chamber (25) that defines a chamb... | 08/22/2006 |
| 7083321 | Single screw extruder The invention relates to a single screw extruder comprising a barrier screw and a barrel in which the barrier screw is held in a manner that permits to rotate and comprising at least one feed zone longitudinal section and at least one melting zone longitudinal secti... | 08/01/2006 |
| 6997596 | Plastic extruder screw tip A plastic extruder screw tip having a conical inwardly and forwardly tapering melt converging surface; having first and second dashers fixedly attached to and extending laterally outwardly from the melt converging surface, the dashers being opposingly arranged and h... | 02/14/2006 |
| 6925929 | Screw press A screw press provided with a rear excess fluid outlet is described herein. The rear excess fluid outlet includes a circular screen provided at a longitudinal end of the screw press body, near a material inlet. Scraper blade assemblies are provided to prevent the sc... | 08/09/2005 |
| 6607299 | Apparatus for removing debris from thermoplastic materials An apparatus for filtering thermoplastic synthetic plastic material has a screw (5) bearingly supported within a housing (1) for rotation around its longitudinal axis for the transport and preferably also plasticizing of the synthethic plastic material. T... | 08/19/2003 |
| 6468067 | Composite extruding apparatus of rubber and method of extruding unvulcanized rubber With the same screw diameter as in conventional screw extruders, the screw length is reduced, whereby the material residue is reduced, the throughput is increased, the screw motive power is reduced, the temperature control is facilitated to prevent rubber... | 10/22/2002 |
| 6375450 | Extrusion apparatus for ceramic honeycomb articles An improvement in a process of making honeycomb articles, which process utilizes a co-rotating, intermeshing twin screw extrusion apparatus to mix, screen, and extrude a batch of ceramic materials through a die, the improvement which comprises the steps o... | 04/23/2002 |
| 6206558 | Extrusion system An extrusion system is provided with a screen changer between in-line screw sections. An in-line seal diverts high pressure, high temperature foamable material toward the screen changer. The seal may have reverse flights to provide a visco-dynamic seal. T... | 03/27/2001 |
| 6062717 | Chopper mixing screw An apparatus and process for chopping and mixing a polymeric material having an elongated hollow barrel element with a material inlet end and a material outlet end and housing a rotatable extruder screw. The rotatable extruder screw includes at least one ... | 05/16/2000 |
| 5567463 | Cooker-extruder apparatus and process for cooking-extrusion of biopolymers A cooking-extruding apparatus and method for the cooking-extrusion of biopolymers for the production of thermally treated food granulates, snack products, cereals or similar products. The cooker-extruder having a feeding hopper, a conveying screw, an exit... | 10/22/1996 |
| 5499869 | Device for adjusting the pressure of the plastic material in a screw extruder A throttle for the adjustment of the pressure of plastic material in screw extruders in which the throttle is a cylindrical plunger submerged in the melt flow in a melt channel. In order to eliminate dead spaces downstream of the throttle, the plunger is ... | 03/19/1996 |
| 5472275 | Assembly for the continuous plasticising and filtration of materials Assembly for the continuous plasticising and filtration of materials. The materials include polymers in the pasty, viscous, or molten state, visco-elastic products and proteoleaginous products. The assembly includes two modules, a plasticising module and ... | 12/05/1995 |
| 5419634 | Apparatus for filtering and extruding synthetic plastic scrap material An apparatus for filtering and extruding plastic scrap consists of an extruder housing having an interior chamber and an extruder worm received and supported for axial rotation in the chamber. The extruder worm includes a centrally located set of return t... | 05/30/1995 |
| 5335991 | Plastic melt extruder having an adjustable throttling gap of non-uniform width An extruder for processing plastic material has a housing with a longitudinal bore in which an extruder screw is coaxially fitted for rotation around an axis of the screw to advance plastic material through the bore by threads on the screw. A plurality of... | 08/09/1994 |
| 5267847 | Compact precision extrusion system A compact and precision extrusion system for extruding strips of rubber compounds with profiles of accurate dimensions. Strips of rubber compound are uniformly heated and mixed in an extruder and then passed through a low pressure drop strainer to remove ... | 12/07/1993 |
| 5253994 | System for molding a synthetic-resin using plastic scrap A synthetic-resin article is molded by plastifying a virgin granulate into a fluent stream and plastifying a recycle granulate into another fluent stream. The recycle stream is then filtered while still plastified to removing particulate impurities from i... | 10/19/1993 |
| 4881886 | Compression head for machine for continuously densifying vegetable matter A compression head for a machine for continuously densifying vegetable matter, wherein radial or virtually radial bars are included in the front face of the disc of the head and are made of a material presenting a coefficient of friction greater than that... | 11/21/1989 |
| 4792238 | Continuous dispersion apparatus having multi-step dispersion chambers An apparatus having a cylindrical structure which has therein a rotary shaft extending along the axis of the cylindrical structure to project beyond the lengthwise end portions thereof, and a plurality of dispersion chambers and an arbitrary number of rec... | 12/20/1988 |
| 4712992 | Extruder with screw having core portion of polygonal cross-section A screw for use in an extruder barrel for plasticizing plastic material from a solid phase to a viscous form wherein the feed screw has a cylindrical core with a helical flight extending for the full length of the screw. A selected portion or portions of ... | 12/15/1987 |
| 4629411 | Apparatus for the separation of admixtures from contaminated thermoplastic materials Apparatus is disclosed for the separation of admixtures from contaminated thermoplastic materials. The apparatus has a distributor screw, a retainer chamber and return flow holes for contaminated materials to pass from the retainer chamber into an annular... | 12/16/1986 |
| 4510110 | High efficiency, fast extruders for extruding and refining soap and detergents A method for extruding and/or refining soap, which comprises supplying soap to one end of a helix disposed in a casing and rotating the helix to move the soap lengthwise along the casing and out of the casing. The helix rotates at a speed between 20 and 5... | 04/09/1985 |
| 4478516 | Apparatus for mixing and blending constituents of a flow of thermoplastics material The constituents of a flow of thermoplastics material or the like are mixed and blended by passing the flow through a mixing structure which defines an array of elongate side-by-side passages. The passages are not all alike in that at least some of them h... | 10/23/1984 |
| 4468126 | High efficiency screw feeders for continuous extrusion and refining of soaps, detergents and other similar plastic products Screw feeder or Archimedian screw for pasty materials, such as soap, wherein the winding angle of the screw ranges between 15° and 25°, and the screw height, diameter and thrust length depend on the section of bar extrusion and/or free passage area of t... | 08/28/1984 |
| 4391575 | Kitchen appliance for making farinaceous products A kitchen appliance for and method of making farinaceous products such as spaghetti, fettucini, macaroni, manicotti, lasagna, pizza crusts, taco shells, bagels, breadsticks and like dough products, use a mixing chamber for receiving the product ingredient... | 07/05/1983 |
| 4363264 | Counter current diffusion extractor A counter current extractor in which material to be extracted is caused to move in counter current with an extracting liquid by a screw conveyor characterized in that the direction of rotation of the screw conveyor is intermittently reversed. A process fo... | 12/14/1982 |
| 4358262 | Filter or tool-changing device for screw extruders In a screw extrusion device used for extruding plastics materials, a filter or tool-carrier is disposed at the downstream or outlet end of the extruder, an annular pressure element bearing on the carrier so as to secure and seal the carrier in its operati... | 11/09/1982 |
| 4350657 | Low-energy extruder-pump system Method and apparatus are disclosed for the low energy melting, extrusion and pumping of material comprising feeding, metering, melting and mixing of such materials in an extruder having a melter screw and subsequently passing the resultant extrudate, thro... | 09/21/1982 |
| 4318677 | Small volume outlet apparatus with a sieve changing device for multiple shaft screw machines 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.... | 03/09/1982 |
| 4304054 | Screw press for drying elastomeric polymers A screw press for drying elastomeric polymers and the like having a cylindrical barrel and intermixed, substantially solid and apertured, discontinuous screw flights for more quickly initiating pressure and temperature increase of polymer in the barrel wi... | 12/08/1981 |
| 4257901 | Cleanable filter and method of cleaning same 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 s... | 03/24/1981 |
| 4227870 | Apparatus for working rubber compounds An extruder for working rubber and other elastomeric compounds having an extruder screw with a feed section, metering section and a transition section. The transition section has a plurality of working sections in succession with each section having a pai... | 10/14/1980 |
| 4170446 | Plastics-processing machine The plastics processing machine employs a mixer which has a static mixing device formed of at least one insertion member composed of guide elements in layers which form flow channels. The hydraulic diameter dh is made no more than eight millime... | 10/09/1979 |
| 4169679 | Apparatus for the extrusion of cellular thermoplastic material The invention provides apparatus for the production of cellular thermoplastic material comprising an extruder having a hollow barrel, screw means mounted in said barrel to advance material therethrough, mixer head means mounted in said barrel and gaseous ... | 10/02/1979 |
| 4154535 | Screw-type plastics extruder A one-screw extruder in which the mechanical thrust function is assigned to a first portion of the screw and of the cylinder, and in which the uniform heating of the material to be extruded is the function of a second portion, thus making it possible for ... | 05/15/1979 |
| 4152076 | Extruder and method for uniformly fluxing and blending thermoplastic materials An extruder apparatus with an extrusion screw having an end member which blends molten and solid thermoplastic materials moving through the apparatus into a uniformly fluxed consistency, and a method for uniformly fluxing and blending thermoplastic materi... | 05/01/1979 |
| 4150932 | Extruder strainer plate 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... | 04/24/1979 |
| 4107260 | Methods of working expandable thermoplastic materials in an extruder Methods are provided for processing expandable thermoplastic materials with a typical compression relief design extruder screw having a helical flight for advancing and working a thermoplastic material. The screw is modified to shorten the feed and compre... | 08/15/1978 |
