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| Number | Title | Issue Date |
| 7410602 | High flow rate dialysis catheters and related methods High flow rate catheters, and related methods, are useful in dialysis and other procedures. A catheter according to the invention comprises a hub and a generally elongated conduit. The conduit has a substantially continuous and smooth wall. The conduit also defines ... | 08/12/2008 |
| 7204946 | Method for forming a golf ball A method and apparatus for forming a golf ball or components of a golf ball is disclosed. In one embodiment, a method includes the steps of forming a die having an opening having a perimeter comprising plurality of inwardly convex surfaces; preparing a golf ball com... | 04/17/2007 |
| 6946094 | Adjustable sizing tube There is provided a plastic extrusion sizing tube having a cylinder with a split along its length to allow for radial expansion and reduction of the sizing tube. The cylinder has holes to allow an extrusion within the cylinder to be drawn to the cylinder by a vacuum... | 09/20/2005 |
| 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 |
| 6779994 | Apparatus for cooling and calibrating an extruded plastic profile An apparatus for cooling and calibrating and extruded plastic profile (2) is described, with a cooling tank (4) which receives a cooling liquid (12) and can be charged with a pressure below atmospheric, and with at least one calibrating device (... | 08/24/2004 |
| 6719942 | Method and apparatus for production of tubing A method and apparatus for producing an extruded product includes a machine that cooperates with an extruder. The machine is commonly used as a corrugator and the extruded product is often corrugated piping. The machine has a frame supporting a trackway in a continu... | 04/13/2004 |
| 6645410 | Manufacturing apparatus and method for multiple containment tubing A manufacturing apparatus and method for multiple containment tubing produces continuous, nested tubing, or one tube within another tube, without having to fix the space between the tubes or position them concentrically. Consequently the tubing is very fl... | 11/11/2003 |
| 6620354 | Apparatus and method for producing and cutting extruded material using temperature feedback An apparatus and method for extruding, cooling and cutting an extrusion using temperature feedback can include an extruder for producing an extrudate which can be fed through appropriate sizing, support and cooling devices, which can include one or more o... | 09/16/2003 |
| 6582643 | Method for producing hollow extrusions Hollow extrusions are formed by initially extruding a plurality of separate strands adapted to form segments of the completed hollow extrusion in their positions corresponding to the locations of those segments in the finished extrusion. Webs between thes... | 06/24/2003 |
| 6579484 | Co-extruded taper shaft An apparatus and method for providing a co-extruded, tapered multi-layer shaft. A co-extruded, tapered multi-layer shaft may be fabricated by selecting a first material for the inner layer of the shaft and a second material for the outer layer of the shaf... | 06/17/2003 |
| 6488873 | Apparatus and method for producing and cutting extruded material using temperature feedback An apparatus and method for extruding, cooling and cutting can include an extruder for producing an extrudate which can be fed through appropriate sizing, support and cooling devices, which can include a vacuum chamber, cooling chamber, and calibrators, w... | 12/03/2002 |
| 6478992 | Extrusion molding method for a thin tube An extrusion molding method including plasticizing and kneading a raw material (1), composed of a synthetic resin material having high heat-resistance and strength, extruding the material from a molding die (3) to form a tubular body (51), passing the tub... | 11/12/2002 |
| 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 |
| 6352785 | Shrinkable film The present invention provides a shrinkable film characterized by being a laminate film having at least one layer formed of a gas barrier resin composition satisfying the following expressions (1) and (2) and by having an average shrinking rate in its lon... | 03/05/2002 |
| 6296804 | Biaxial stretching of plastic tubes A continuous process and apparatus for producing oriented plastic tube comprising the steps of extrusion, temperature conditioning, diametrical expansion and cooling, characterized by the step of inducing axial draw of the tube between first and second ha... | 10/02/2001 |
| 6287102 | Extruder with a shaping device The invention describes an extrusion system (1) with a shaping device (3), which has at least one calibrating device (9) comprising in particular a plurality of calibrating tools disposed in succession in the extrusion direction. The calibrating device (9... | 09/11/2001 |
| 6217963 | Seamless tubular composite film and method for producing the same A seamless tubular composite film wherein a seamless tubular film comprising fluororesin with a film thickness of 5-20 μm stretched 2-10% in circumferential direction is fitted on the outside of a seamless tubular film comprising a thermosetting polyimid... | 04/17/2001 |
| 6210617 | Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe The present invention relates to an apparatus for producing pipes of a moldable material, preferably plastic, comprising an extruder, a cylindrical mold comprising chill molds (4, 5), a mandrel (8) inside the extruder and a kernel (9) as an extension of t... | 04/03/2001 |
| 6153132 | Control method for the manufacture of oriented plastic tubes A method of expanding a tube of plastics material in which a longitudinally travelling tube is progressively diametrically expanded in internal fluid pressure in an expansion zone between an upstream plug and an expandable downstream plug. Expansion of th... | 11/28/2000 |
| 6135748 | Apparatus for manufacturing a replacement pipe liner in reduced form An apparatus for manufacturing a liner for installation in an existing conduit in reduced form. The apparatus includes an extruder for extruding heated thermoplastic pipe material through a die to form a tubular shape, a shaping station for shaping the ex... | 10/24/2000 |
| 6135159 | Composite conduit for carrying fuel oil An elongate deformable conduit and method of fabrication thereof adapted for the subterranean conveying of petroleum products and petrochemicals has an inner copper tube to which is bonded an outer layer of flexible polyvinyl chloride up to about one-thir... | 10/24/2000 |
| 6066288 | Method for cooling and if necessary calibrating articles of plastic A method for cooling and if necessary calibrating elongate articles 7 of plastic, in which the article 7, during its continuous progress has flowing round it only a gaseous cooling medium 42 at a temperature of less than 100° C. at least over a portion o... | 05/23/2000 |
| 6050800 | Sizing apparatus A sizing sleeve for controlling the diameter of plastic tube includes pressurized sizing sleeve portions in which fluid is injected under pressure about the tube circumference to form a lubricating layer. Drainage zones axially separate and isolate adjace... | 04/18/2000 |
| 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 |
| 5943756 | Method of calibrator changeover Calibrators (10-16) are pre-aligned on a base (18) that is positioned on a table (60). A guide (82) includes a first section (84a, 84b) connected to base (18) and a second section (94) connected to table (60). First section (84a, 84b) cooperates with seco... | 08/31/1999 |
| 5945048 | Process and device for extruding polymer melts to form hollow chamber sections In a process for extruding polymer melts (25) to form hollow chamber sections (21) by pressing the polymer melt through a shaping tool (24) with an internal shaping mandrel (26) and by subsequently sizing and cooling the hollow chamber section strand in a... | 08/31/1999 |
| 5942256 | Bubble stabilizer and sizing cage with wear strips An external stabilizer employed in a plastic film blowing apparatus incorporates one or more extruded members that carry a low-friction plastic wear cover. A tubular die, fed with a supply of molten thermoplastic polymer, extrudes a tube of the molten pol... | 08/24/1999 |
| 5911933 | Method for producing a thermoplastic tubular profile and internal cooling unit for such a method A tubular profile made of thermoplastic material is formed by extrusion from an extruder. Downstream from the extruder, the tubular profile is cooled both externally and internally by an external cooling unit and an internal cooling unit mounted on the ex... | 06/15/1999 |
| 5891481 | Tubular calibration unit for machines for extruding plastic strings such as pipes For calibration and stabilization of the discharge product from extruders it is known to use tubular calibration units both for calibration of the product diameter and for cooling of the product for initial stabilization of the product, whereby the calibr... | 04/06/1999 |
| 5868171 | Composite conduit for carrying fuel oil An elongate deformable conduit and method of fabrication thereof adapted for the subterranean conveying of petroleum products and petrochemicals has an inner copper tube to which is bonded an outer layer of flexible polyvinyl chloride up to about one-thir... | 02/09/1999 |
| 5824351 | Molding apparatus with non-reflective mold tunnels A plastic part forming apparatus includes a mold tunnel into which molten plastic is fed to form the plastic part. The mold tunnel is made from thermally conductive material and has a part shaping interior face which is non-reflective such that the interi... | 10/20/1998 |
| 5817270 | Method and device for manufacturing biaxially oriented tubing from thermoplastic material Method and devices for manufacturing biaxially oriented tubing from thermoplastic material. The method includes forcing the tube over a mandrel at an orientation temperature of the plastic material, which mandrel includes an expansion part which produces ... | 10/06/1998 |
| 5785906 | Method and device for manufacturing biaxially oriented tubing from thermoplastic material A method for manufacturing biaxially oriented tubing from a thermoplastic material. The method includes forcing the tube over a mandrel at an orientation temperature of the plastic material, which mandrel is an expansion part which produces expansion in t... | 07/28/1998 |
| 5741384 | Process for making glass fiber-reinforced composite material To prepare a glass fiber-reinforced composite material, a glass fiber strand is drawn through an agitated aqueous powder dispersion of a coupling agent over a deflection body, the water is removed, the powder is melted onto the glass fiber strand and the ... | 04/21/1998 |
| 5725814 | Extrusion of an article of varying content A coextrusion system employs two or more extruders, each with a gear pump at its output connected to a coextrusion die. Different materials are extruded by each extruder. Varying the speed of one or both gear pumps varies the content of the extrudate. The... | 03/10/1998 |
| 5686041 | Method of producing an hydraulic hose having ends of different diameter An apparatus and method for producing an hydraulic hose having ends of different internal diameters. An uncured hose is produced by conventional extrusion. The uncured hose is placed upon a mandrel having a reduced diameter end. That end of the uncured ho... | 11/11/1997 |
| 5645861 | Guide roller assembly for a vacuum sizing tank A guide roller assembly is provided for use with a vacuum sizing apparatus having an elongated vacuum cooling tank containing a water bath through which plastic extrudate passes longitudinally. The guide roller assembly has a plurality of guide rollers ea... | 07/08/1997 |
| 5631069 | Medium modulus molded material comprising substantially linear polyethlene and fabrication method Medium modulus molded polyethylene materials with improved impact strength are made. The polyethylene material is molded to pipes, bars, and sheets. The molded material comprises high molecular weight linear polyethylene and a substantially linear ethylen... | 05/20/1997 |
| 5607638 | Vacuum sizing apparatus and method of using same A vacuum sizing apparatus and method of cooling and sizing plastic extrusions. In one embodiment the molten plastic extrudate enters a first vacuum chamber, passes into an ambient air environment, and then passes into a second water chamber. The first vac... | 03/04/1997 |
| 5593629 | Method for increased productivity of industrial fiber A process for producing industrial denier filaments of a thermoplastic polymer at higher rates of production than those using liquid quenching media is disclosed. Liquid polymer is extruded in the form of hollow filaments at a throughput and rate of take ... | 01/14/1997 |
