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| Number | Title | Issue Date |
| 8177412 | Kneading apparatus and method for kneading rubber-based composition using the same A kneading apparatus includes a barrel having a cylindrical chamber; a screw assembly rotating in the chamber so that a material to be kneaded is extruded in the axial direction by the rotation, the screw assembly including a screw section having helical blades and ... | 05/15/2012 |
| 7866876 | Device for degassing and filtering plastic melts The invention relates to a device for the extrusion of thermoplastic synthetic material featuring an extruder screw (2) which is mounted on a housing (1) including a plasticizing section (P) at the inlet side, a degassing section which is mounted upstr... | 01/11/2011 |
| 7607817 | Extruder having a set back gas-permeable wall portion An extruder with a housing comprising parallel, partially inter-engaging bores and screws disposed therein is used when applying a method of feeding powdery bulk materials into such an extruder. A solid transport of powdery bulk material takes place in an inlet zone... | 10/27/2009 |
| 7419295 | Extruder An extruder includes a barrel and a kneading screw extending through the barrel in a rotatable fashion. The kneading screw is provided with a devolatilization portion. The devolatilization portion includes a kneading flight that is twisted in a direction for transfe... | 09/02/2008 |
| 7380973 | Method and device for the reprocessing of a thermoplastic polycondensate Method and device for reprocessing a thermoplastic polycondensate, in particular for the recycling of thermoplastic polycondensates, such as polyethylene terephthalate, polyester or polyamide is provided. The polycondensate is introduced into an extruder in a solid ... | 06/03/2008 |
| 7335008 | Apparatus and method for producing woodfuel briquettes, pellets, compounds, agglomerates, granulates, and the like An apparatus and a method for producing woodfuel briquettes, pellets, compounds, composites, agglomerates, or granulates as source material for subsequent processing in injection molding or extrusion processes, includes a pressing screw with screw spirals, which rot... | 02/26/2008 |
| 7322738 | Conical twin-screw extruder and dehydrator In a conical twin-screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material... | 01/29/2008 |
| 7284897 | Extruder for continuously working and/or processing flowable materials An extruder has at least three parallel, co-rotating shafts disposed in a cavity therein along a circle. The shafts are equipped with screw elements closely intermeshing over their whole circumference. At least one screw element is formed as a passage screw element ... | 10/23/2007 |
| 7246936 | Dynamic mixer screw tip The present invention includes a screw tip for an extruder screw for effecting mixing in an extruder. The screw tip has a shaft portion and at least one mixing element ring connected to the shaft portion, or a mixing element having an aperture therethrough, or both.... | 07/24/2007 |
| 7198840 | Profile-extruded poly(vinyl chloride) articles and method of making same A profile-extruded article is disclosed, made of a fiber-reinforced polymer of vinyl-chloride monomer, wherein the article has a ratio of actual specific gravity to theoretical specific gravity of nearly unity. A method of making the article is also disclosed. ... | 04/03/2007 |
| 7188992 | Kneading element and related articles A modified kneading element for a screw extruder, peripherally congruent, aligned, and contiguous with a cross-sectional profile of a modified conveying element, includes a central portion defining a root diameter having a shaft receiving bore defined therein; and a... | 03/13/2007 |
| 7144981 | Process for separating volatile components from polymers A process for concentrating polymers by evaporation is disclosed. The process entails (i) obtaining a mixture containing a polymer and volatile component, the volatile components being present in the mixture at an amount less than 20 wt. % relative to the weight of ... | 12/05/2006 |
| 7137802 | Apparatus for processing thermoplastic synthetic plastic material An apparatus for processing thermoplastic synthetic plastic material to be recycled comprises a first receptacle (1) and a second receptacle (2) for the material to be processed. Within both receptacles (1, 2) tools (21) for mixing and he... | 11/21/2006 |
| 7128464 | Method and device for regulating pressure in a single-screw degassing extruder or in a cascade extruder The invention relates to a method for regulating the minimal value of the pressure in the first half of the metering zone in a direction of conveyance in a single-screw degassing extruder or in a cascade extruder during the conveying of a melt consisting of a thermo... | 10/31/2006 |
| 7123212 | Information transmission and display method and system for a handheld computing device Methods and systems for display of information on an external display using a handheld computing device are provided. An expansion module is configured to attach to a handheld computing device such as a personal digital assistance (PDA). The expansion module include... | 10/17/2006 |
| 7100604 | Latching system and method for pressure chambers A latching mechanism for a pressure chamber for hypobaric use is disclosed. The mechanism includes one or more pin modules positioned on a periphery of a door of the pressure chamber, the door being adapted to open into the chamber and abut a frame of the pressure c... | 09/05/2006 |
| 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 |
| 7083826 | Coating die and method for use The invention is a die comprising a die body. The die body defines an internal cavity and an applicator slot. The cavity is in fluid communication with the applicator slot. A plurality of gas relief passages are in fluid communication with the internal cavity. ... | 08/01/2006 |
| 7083319 | Large-volume reactor having a plurality of process spaces A large-volume reactor (10) for treating a free-flowing material, having a housing (12) which surrounds an interior space (14), a material feed (11) at one end of the housing (12) and a material discharge (13) at the other e... | 08/01/2006 |
| 7080935 | Multi-screw extruder The invention relates to a multi-shaft extruder for the continuous treatment and/or processing of bulk material, especially a powdery, granular or flocculent product, comprising a plurality of shafts (3) which are arranged in a crown-like manner in a cavity (... | 07/25/2006 |
| 7060788 | Process for stripping monomers and other volatile constituents from polymer melts A process for stripping volatile constituents from polymer melts is disclosed. The process entails introducing the polymer melt into a horizontally oriented cylindrical device that contains a plurality of perforated disks rotating about a common horizontally oriente... | 06/13/2006 |
| 7040798 | Ring extruder feed The invention relates to a multi-screw extruder for the continuous treatment and/or processing of a bulk material, especially a product in powder, granular or flake form, comprising several shafts (3) which are arranged in a ring shape in a cavity (1) ... | 05/09/2006 |
| 7025491 | Homogenizing and/or dispersing device comprising endless screws An apparatus for homogenizing and/or dispersing at least one viscous substance and at least one solid and/or at least one other substance of different viscosity includes in a space in a housing axis-parallel rotatable shafts disposed along a circle with equal centra... | 04/11/2006 |
| 7017732 | Multiple extruder configuration The invention concerns a multiple-extruder configuration in which two co-rotating twin-screw extruders and a counter-rotating twin screw extruder are connected to each other with respect to the flow of material. ... | 03/28/2006 |
| 7008202 | Method and apparatus for forming thermoplastic resin foam The present invention relates to the step of plasticizing a thermoplastic resin material by rotatably driving a screw (20). Also included in the method is the step of injecting an inert gas into a screw cylinder (1) to permeate the melted resin and inj... | 03/07/2006 |
| 7004616 | Kneading apparatus and method for kneading rubber-based composition using the same A kneading apparatus includes a barrel having a cylindrical chamber; a screw assembly rotating in the chamber so that a material to be kneaded is extruded in the axial direction by the rotation, the screw assembly including a screw section having helical blades and ... | 02/28/2006 |
| 6994540 | Injection molding system and pellet feeding unit In a conventionally used injection molding apparatus, undried resin pellet is put in a drier of a predetermined temperature and water and gas in the undried resin pellet is completely removed, and the dried pellet deprived of water and gas is thrown into the injecti... | 02/07/2006 |
| 6913380 | Continuous preparation of heat-vulcanizable silicone compositions High levels of treated fumed silica, processing fluid and high molecular weight silicone polymer are continuously compounded into a homogeneous silica filled heat-vulcanizable silicone composition by forming a premix in a continuous annular layer mixer and continuou... | 07/05/2005 |
| 6869211 | Screw-type extruder An extruder for processing of thermoplastics has a housing (1) in which a screw is pivotally supported. A land (5) which runs in a helical line protrudes from the core (4) of the screw. There is at least one ventilation opening in the housing in... | 03/22/2005 |
| 6811294 | Device and method for degassing plastics An apparatus for degassing plastic materials, e.g., high molecular weight polycarbonate solutions, is described. The apparatus includes a double-shaft extruder having a length-to-diameter ratio of less than or equal to 40, which comprises: (i) two co-rotating and me... | 11/02/2004 |
| 6726464 | Mixing device for manufacturing molding An apparatus for manufacturing moldings by which clear colors and patterns can be brought out without a remarkable lowering of strength. Immediately before delivery to a metal mold, outer resin material positioned on the main cylinder inner wall side is put in the m... | 04/27/2004 |
| 6531079 | Gear extruder having gas vent ports The invention relates to a gear extruder for plasticizing and homogenizing rubber mixtures, having at least two gears disposed in chambers in the extruder housing, with the teeth of the gears meshing with one another, and having a port for feeding the rub... | 03/11/2003 |
| 6527429 | Dust-free rubber mixer To provide a dust-free rubber mixer which does not release contaminants such as dusts generated in the rubber mixer into a working room. In the dust-free rubber mixer comprising a rubber mixing section having a plurality of rubber mixing rolls and a drivi... | 03/04/2003 |
| 6422732 | Device for the extraction of undesired substances from an extruder The device for extracting undesired substances, such as volatile components of low molecular weight, free gases, liquids and the like, from the cylinder of an extruder, in particular for thermoplastic materials, includes a casing defining internally an ob... | 07/23/2002 |
| 6387306 | Deaeration of feed materials in an extrusion process In a method for molding a raw material including a plastic material or a mixture of plastic and non-plastic materials fed into a cylinder, the said raw material is subjected to a melt-kneading performed under oxygen-free conditions, and at the same time t... | 05/14/2002 |
| 6361200 | Gear extruder having gas vent ports The invention relates to a gear extruder for plasticizing and homogenizing rubber mixtures, having at least two gears disposed in chambers in the extruder housing, with the teeth of the gears meshing with one another, and having a port for feeding the rub... | 03/26/2002 |
| 6312148 | Removal of gaseous phase from continuous mixing chamber for rubber compound A continuous mixing apparatus and process for preparing a rubber compound in an elongated mixing chamber defined by the volume between a radially inner surface of a stator and a radially outer surface of a rotor, the constituents being such that their mix... | 11/06/2001 |
| 6302572 | Back vented barrel for an extruding assembly A vent passage (28) extends from a main extruder passage (24) and is spaced from and between a feed extruder passage (26) and a back surface (16) of the barrel (10). The barrel (10) is characterized by the vent passage (28) being disposed to extend from t... | 10/16/2001 |
| 6293690 | Vented single stage barrier screw with a gas vent hole and axial bore in the screw for venting gases A barrel contains an extruder conveying screw which has a drive end, a feed section, a melting section and a pumping section wherein the screw has a vent hole located from 0 to 2 screw diameters from the beginning of the feed section. An axial bore in the... | 09/25/2001 |
| 6190031 | Machine for continuous processing of flowable materials having a housing jacket divided into long and short segments A machine for continuous processing of flowable materials has a plurality of axis-parallel shafts in a space in a housing along a circle. Each shaft includes shaft bearing processing elements which tightly intermesh adjacent shafts. Between a material inl... | 02/20/2001 |
