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| Number | Title | Issue Date |
| 7390455 | Method for continuously producing plastic tubes by biaxial drawing and a production line for carrying out said method The invention relates to a method for continuously producing plastic tubes by biaxial drawing consisting in producing a blank (E) by extrusion, heating said blank to a molecular condensation temperature, radially dilating it by the internal pressure of a fluid appli... | 06/24/2008 |
| 7370766 | Filter cloth and replaceable filter module A filter cloth whose underside comprises substantially parallel, additional yarns 8 that are thicker than the rest of the yarns of the cloth, substantially parallel channels 9 being formed between the yarns, wherein filtered liquid passed through the c... | 05/13/2008 |
| 7314592 | External thickness control and method A plastic resin extrusion line for the production of blown film includes an external thickness control device that provides a controllable amount of air from an inlet side through an annular region to one or two sets of lips. Barriers that can be manually or automat... | 01/01/2008 |
| 7294301 | Die assembly and method for forming honeycomb filters A method for forming honeycomb structures, such as wall-flow honeycomb filters, which utilizes extrusion of multiple material supplies at once. Such methods may be used to form intermittent plugs or other structures in the cell channels during the extrusion process,... | 11/13/2007 |
| 7267535 | Pipe molding apparatus with mold tunnel air turbulence An extruding apparatus which extrudes continuous length of hollow plastic product has an extruder (3) which feeds molten plastic through die equipment (5) to a mold tunnel (7) formed by side by side moving mold blocks (9). The apparatus i... | 09/11/2007 |
| 7264764 | Method of manufacturing branching pipe The manufacturing method of the invention manufactures a fuel filler pipe (branching pipe), where a breather pipe is branched off from a filler pipe main body. The manufacturing method extrudes a first extruded tubular member and a second extruded tubular member, co... | 09/04/2007 |
| 7258141 | Pipe liner apparatus and method A thermoplastic pipe liner assembly and method for installation in a pipeline by pulling the pipe liner assembly through the pipeline in a temporarily folded condition wherein the thermoplastic pipe liner assembly has a core inner liner, an outer liner with optional... | 08/21/2007 |
| 7238317 | Method of continuously producing a twin-wall pipe with a ventilation zone between a socket and an adjacent elevation A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is ma... | 07/03/2007 |
| 7226558 | Method of making an expanded polytetrafluoroethylene structure A high density microwall ePTFE structure and a method for making, involving the manipulation of a standard extruded ePTFE graft. The final product has the desired characteristics of high density, reduced wall-thickness, above-average radial strength and enhanced sut... | 06/05/2007 |
| 7223089 | Infinitely adjustable calibrating shell for continuous extruded plastic parts, in particular plastic pipes Infinitely adjustable calibrating shell includes a central piece formed by strips or bands which are hingedly connected to each other and intersect like an extendable lattice that is formed into a shell. Preferably, the ends of the strips are movably connected to an... | 05/29/2007 |
| 7160499 | Method for making inflation films An inflation film is formed by extruding a raw resin in a molten state through a circular die to form a tubular film, expanding the tubular film by the pressure of a gaseous medium introduced into an inner space of the tubular film, while the tubular film is being c... | 01/09/2007 |
| 7147451 | Apparatus for restoring the necked-down end of a tubular core An apparatus for restoring a necked-down end of a plastic core includes molding and curing stations and a core handling system having a carriage for sequentially positioning the core adjacent the stations. The molding and curing stations are heated and cooled, respe... | 12/12/2006 |
| 7112047 | Infinitely adjustable calibration sleeve for extruded plastic pipes Infinitely adjustable calibration sleeve for extruded plastic pipes includes an inlet head and two strap layers that intersect like a lattice grate and that are linked with each other at the crossing points. In that manner, the inlet head and the strap layers are ad... | 09/26/2006 |
| 7101629 | Polyethylene films A film comprising a polyethylene composition, the polyethylene composition in one embodiment comprising a high molecular weight component having a weight average molecular weight of greater than 50,000 amu and a low molecular weight component having a weight average... | 09/05/2006 |
| 7090927 | Polyethylene films A film comprising a polyethylene composition, the polyethylene composition in one embodiment comprising a high molecular weight component having a weight average molecular weight of greater than 50,000 amu and a low molecular weight component having a weight average... | 08/15/2006 |
| 6905642 | Method and continuous production line of plastic tubes with bi-axial drawing, and resulting plastic tube The invention concerns a continuous manufacturing method which consists in producing a blank (E) by extrusion, bringing said blank to a temperature for molecular orientation, passing said blank around a radial expansion mandrel (12); gauging and cooling while... | 06/14/2005 |
| 6805824 | Process for manufacturing a porous drainage medium In a process for making a porous drainage medium composed of entangled strands of thermoplastic resin, subsequent to forming a tubular preform, the preform is formed with necked-down sections at intervals along the length thereof before proceeding to a cooling tank.... | 10/19/2004 |
| 6680022 | Apparatus for the calibration of hollow chamber sheet extruded lines An apparatus for calibrating hollow chamber sheet extruded lines out of thermoplastic resin includes a vacuum housing and a planar intake area at a first end of the vacuum housing. The planar intake area is configured to receive the extruded line. Support... | 01/20/2004 |
| 6592786 | Method and apparatus for lay flat control in an extruded film production line An apparatus for producing an extruded film tube and supplying said tube to a collapsing and roller assembly includes a die for extruding a molten material in the form of a tube which is in a molten state below a frost line and in a solid state above the ... | 07/15/2003 |
| 6454989 | Process of making a crimped multicomponent fiber web The present invention provides continuously crimped propylene polymer nonwoven fabrics as well as processes for forming crimped multicomponent propylene polymer fibers by melt-attenuating extruded multicomponent fibers with heated or unheated air wherein ... | 09/24/2002 |
| 6368547 | Method for producing an extruded hollow plastic section Apparatus and method for producing a hollow plastic section by extrusion through a die in a horizontal direction. The die has an inner mandrel which forms the cavity in the section. A first sealing plug and a second sealing plug, which sealing plugs are s... | 04/09/2002 |
| 6228315 | Torsion cords and method for molding the same A new and improved apparatus and method for producing torsion cords comprising the steps of: (1) casting a torsion cord of a rubber composition, the mold having a high pressure resistant cylindrical wall and opposite closed ends, (2) efficiently curing th... | 05/08/2001 |
| 6217811 | Process and apparatus for vault-structuring of thin material sheets According to the invention thin sheets of foil are stiffened in a particular way by means of vault-structuring. The vault-structuring occurs either by self-organizing or following a self-organized design with a spade-shaped or drop-shaped pattern.... | 04/17/2001 |
| 6183609 | Sintered laminated structures, electrochemical cells and process for producing such sintered laminated structures A sintered laminated structure including a plurality of ceramic layers made of ceramic materials different from one another, wherein each of the ceramic layers is provided with through-holes passing each of the ceramic layers.... | 02/06/2001 |
| 6143219 | Method and apparatus for producing gas occlusion-free and void-free compounds and composites The present invention discloses a generic method for producing void and gas occlusion free materials, as well as apparatuses for batch and continuous production of same. This generic method can be utilized in the production of a wide variety of polymeric ... | 11/07/2000 |
| 6120791 | Methods for making controlled release devices for pharmaceuticals The invention relates to a process for making a controlled release device suitable for introduction into a human or animal body. The process comprises coextruding a continuous external body comprising a silicone elastomer and one or more elements comprisi... | 09/19/2000 |
| 5992467 | Liner reduction system using pressurized dies and apparatus therefor This application discloses a liner pipe reduction system comprising at least one pressurized die and at least one pressure cell. The pressurized dies and pressure cell are interconnected to form a reduction system to reduce the friction of liner pipe as i... | 11/30/1999 |
| 5891383 | Method and apparatus for cooling extruded film tubes The present invention is directed to a blown film extrusion apparatus in which film is extruded as a tube from an annular die and then pulled along a predetermined path. The improved blown film extrusion apparatus includes a system for gauging and control... | 04/06/1999 |
| 5840244 | High impact LLDPE films with high stalk extrusion Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tu... | 11/24/1998 |
| 5804221 | Air ring for cooling blown plastic film An air ring for supplying cooling air to a hot extruded plastic film after the film has been extruded from an annular extrusion die at an elevated temperature has an annular body which surrounds the tubular film after the film has left the extrusion die. ... | 09/08/1998 |
| 5762860 | Method of and apparatus for producing water soluble polymeric tube A method of and an apparatus for cooling or quenching a tube extruded from a water soluble polymer includes a plurality of cooling rings with bores through which the extruded tube passes. A gaseous cooling medium, such as compressed air, is supplied to ea... | 06/09/1998 |
| 5756041 | Method and apparatus for processing blown tube films Methods and apparatus for the processing of a continuous blown film undergoing collapsing in which a plurality of differential elements of the film follow respective streamline paths which are approximately equal in length to the path of the longest strea... | 05/26/1998 |
| 5733487 | Method of expanding polymeric tubing An apparatus and process for expanding polymeric tubing including a bubble of trapped gas within the polymeric tubing. The tubing is expanded by creating a pressure differential between the inside and outside of the tubing such that the pressure inside th... | 03/31/1998 |
| 5658525 | Cellulose food casing manufacturing method In a method for forming a cellulose tube suitable for use as a food casing, in which a solution of nonderivatized cellulose, tertiary amine N-oxide and water is extruded through a die gap and the extruded tube is downwardly drawn through an air gap while ... | 08/19/1997 |
| 5595623 | Method for making a barrier film with improved extensibility for cheese packaging A method for making a film which is useful in the packaging of newly formed blocks of cheese and demonstrates flexibility, extensibility, and improved sealing strength comprises extruding an ethylene vinyl acetate/very low density polyethylene sealing lay... | 01/21/1997 |
| 5565503 | Chemically degradable polyolefin films The present invention is directed to melt blown polyolefin film which is produced cheaply by melt blowing polyolefin resins which contain 25 to 60 wt % fillers selected from the fillers including an inorganic carbonate, synthetic carbonates, nepheline sye... | 10/15/1996 |
| 5540881 | Apparatus and process for automatically blowing a bubble The present invention relates to an apparatus for automatically blowing a bubble in the production of tubular biaxially stretch oriented thermoplastic flexible film by the "bubble" method comprising a high flow fluid conduit having a proximal end for intr... | 07/30/1996 |
| 5525277 | Method and apparatus for cooling extruded film tubes A method and apparatus for blown film extrusion is described. An annular die receives a molten material and extrudes a film tube. At least one cooling ring is positioned adjacent the annular die for passing an air stream along a particular surface of the ... | 06/11/1996 |
| 5511964 | Apparatus for the production of plastic pipes An apparatus for the manufacturing of plastic pipes has half shells of which two at a time combine as a pair to form a mold. It is provided with a temperature-regulating bell. Supply lines are formed as flexible supply hoses of temperature-resistant plast... | 04/30/1996 |
| 5476630 | Method for manufacturing dental aspirators Method of manufacturing a dental aspirator by extruding a continuous tube with a bellows portion. The tube is angled to form a number of folds, each of which consists of two cup-shaped portions having concave surfaces facing each other. One cup-shaped por... | 12/19/1995 |
