| Patents for B29L 23 - Tubular articles (4,866) |
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| 11/05/1991 | US5062780 Vulcanization apparatus |
| 11/05/1991 | CA1291610C Coinjection of hollow articles and preforms |
| 10/31/1991 | DE4013471A1 Jig for butt welding plastic components |
| 10/30/1991 | EP0454420A2 Biaxially stretched multilayer film and process for manufacturing same |
| 10/30/1991 | EP0454309A2 Material and process for lining pipes |
| 10/30/1991 | EP0453903A2 Apparatus for butt-welding of plastic parts |
| 10/29/1991 | CA1291306C Triple-wall foam coextrusion apparatus |
| 10/17/1991 | WO1991015350A2 Process for manufacturing a tube with a multilayer tube head and tube consisting of a pipe body made of at least one layer of plastic and a multilayer tube head |
| 10/17/1991 | WO1991015349A2 Device for manufacturing tubes |
| 10/16/1991 | EP0304476B1 Method of joining articles |
| 10/15/1991 | US5056346 Method and device for manufacturing bellows pipe |
| 10/15/1991 | CA1290529C Apparatus for extruding composite sided plastic tubes and manufacturing process using same |
| 10/03/1991 | WO1991014896A1 Pipeline and passageway lining materials |
| 10/02/1991 | DE4009656A1 Forming collapsible laminar plastic tube - moulding e.g. three-ply top on to suitable plastic tube and forming final shape in additional stages once each stage has stabilised |
| 09/24/1991 | US5051081 Apparatus for producing spiral pipes with rib |
| 09/10/1991 | US5047104 Profiles of composite fibrous materials |
| 08/27/1991 | US5043126 Method for the production of a stopcock for medical devices consisting of plug and housing |
| 08/21/1991 | EP0441982A1 Construction method of reversal tube lining on conduit without excavation |
| 08/20/1991 | CA1287721C Installation for producing packaging containers |
| 08/14/1991 | EP0441142A2 Functioning method of an installation for manufacturing biaxially stretched plastic tubes |
| 08/13/1991 | US5038455 Method of manufacturing tube coupling bodies |
| 08/13/1991 | CA1287466C Apparatus for unwrapping and removal of rubber tubes |
| 08/08/1991 | WO1991011606A1 Fuel-injection nozzle with an overflow-oil line |
| 08/08/1991 | CA2035802A1 Method and apparatus for producing biaxially stretched thermoplastic tubing |
| 07/23/1991 | CA1286581C Process and apparatus for installing a new pipe inside an existing pipe |
| 07/16/1991 | US5032335 Fluoropolymers |
| 07/03/1991 | CN1052629A Connection component of type with improved electrical resistor for jointing together plastic elements by thermalwelding |
| 07/02/1991 | CA1285360C System for producing tubes |
| 06/25/1991 | US5026267 Apparatus for forming thermoplastic material |
| 06/12/1991 | EP0431000A1 Method and device for joining together of tubular plastic products. |
| 06/11/1991 | US5023115 Method of forming coatings in coated tubular metal members |
| 06/11/1991 | US5023029 Method and apparatus for producing pipe with annular ribs |
| 06/05/1991 | EP0430762A2 Process and apparatus for detecting the heat condition of a plastic element and element for joining plastic parts |
| 06/05/1991 | CN1012721B Process and apparatus for manufacturing ribbed tube of plastics |
| 05/08/1991 | EP0425656A1 Apparatus for forming endless loops from sheet material. |
| 05/02/1991 | DE4034254A1 Plastic ribbed pipe prodn. line - has alternative calibrator vessel for smooth walled tubes for fitting in the rib generator |
| 05/01/1991 | WO1991006419A1 Apparatus for making plastic tubing including mold blocks hingeably openable and closeable |
| 04/23/1991 | US5009587 Injection molding machine for making tubular workpieces from plastic material |
| 04/18/1991 | WO1990011327A3 Process for manufacturing plastic parts, in particular pipes, and diluted mixture for implementing the process |
| 04/10/1991 | EP0421607A1 Tape coating |
| 04/10/1991 | EP0420933A1 Methods and devices which make use of conductive polymers to join articles. |
| 04/09/1991 | US5006376 Joint boot molded of a thermoplastic polyester elastomer |
| 03/27/1991 | EP0418760A2 Method of manufacturing a large calibre plastic pipe and extruder for carrying out said method |
| 03/27/1991 | EP0290429B1 Apparatus and method for the production of ribbed pipes |
| 03/27/1991 | CN1012210B Lining of pipes |
| 03/26/1991 | US5002478 Improvements in suction applying mold blocks in pipe forming apparatus |
| 03/23/1991 | WO1991004147A1 Sizing tool |
| 03/21/1991 | WO1991003366A1 Modular corrugator |
| 03/13/1991 | CN1011955B Extrusion tubes of semicrystalline plastic and their process |
| 03/06/1991 | WO1991003369A1 Construction method of reversal tube lining on conduit without excavation |
| 03/06/1991 | EP0415068A2 Process and apparatus for welding tubular thermoplastic elements |
| 03/05/1991 | US4997360 Apparatus for manufacturing heat-shrinkable resin tube |
| 03/05/1991 | CA1280863C Method and apparatus for injection-molding a micro-pipette |
| 02/20/1991 | CN1049311A Double bubble process for making strong, thin films |
| 02/06/1991 | EP0411055A1 Bonded article. |
| 02/05/1991 | US4990383 Plastic coated steel tube and method for preparing the same |
| 02/05/1991 | US4990380 Heat recoverable article |
| 01/30/1991 | EP0410792A2 Double bubble process for making strong, thin films |
| 01/29/1991 | US4988466 Method and an apparatus for the production of ribbed pipes |
| 01/29/1991 | CA1279456C Corrugated mold block |
| 01/24/1991 | WO1991000887A1 Composite sintered polymeric material |
| 01/24/1991 | WO1990014941A3 Welding of plastic pipe elements |
| 01/23/1991 | EP0409021A2 Apparatus and method for producing tubular articles |
| 01/16/1991 | EP0263860B1 Methods and devices for fabricating and laying reinforcement armourings and curved elements reinforced with bars for elongate flexible bodies |
| 01/13/1991 | WO1991000797A1 Apparatus for manufacturing ribbed pipes |
| 01/09/1991 | EP0406596A1 Method for manufacturing collar- or flangelike reinforcements upon fibrous composite elements, particularly upon wound fibrous composite pipes |
| 01/09/1991 | EP0406292A1 Manufacture of a reinforced tubular article. |
| 01/02/1991 | EP0404822A1 Manufacture of a tubular article |
| 01/02/1991 | CN1048189A Hollw elongate mouldings |
| 01/02/1991 | CA1278536C Plastic corrugated tube with integrally molded sleeve coupler |
| 12/27/1990 | EP0404670A1 Method for the optimisation of multilayer pipes made of composite materials and pipes obtained by the implementation of such method |
| 12/27/1990 | EP0328600A4 Corrugated pipe connector and method of molding |
| 12/19/1990 | CN1047825A Profiled sheathed wire intended in particular for forming electric resistance welding insert |
| 12/12/1990 | EP0402201A2 Wire with shaped coating, especially for making an electro-fusion insert |
| 12/12/1990 | EP0401498A2 Hollow, elongate mouldings |
| 12/09/1990 | CA2018555A1 Profiled sheathed wire for forming into an electric resistance welding |
| 12/05/1990 | EP0400339A2 Apparatus for manufacturing reinforced polymeric tubing |
| 11/29/1990 | WO1990014211A1 Apparatus for forming endless loops from sheet material |
| 11/28/1990 | CN1047248A Equipment for welding melt-weldable plastic pipe elements, welding method wherein said equipment is used, pipe fittings to be used with said equipment and in said method, and pipe elements so obtained |
| 11/27/1990 | US4973242 Metal mold for injection molding tubular or columnar products and molded product obtained by using same |
| 11/27/1990 | CA1276766C Heat-shrinkable tubular film material |
| 11/19/1990 | WO1990014941A2 Welding of plastic pipe elements |
| 11/19/1990 | CA2054680A1 Welding of plastic pipe elements |
| 11/14/1990 | EP0396737A1 High speed contact sealer. |
| 11/13/1990 | US4969972 Device for welding tubular components of thermoplastic material |
| 11/06/1990 | CA1275773C Apparatus and a method for the protection of ribbed pipes |
| 10/17/1990 | EP0392914A2 Composite tube with a thermoplastic fiber coating and method for producing such a tube |
| 10/17/1990 | CN1046119A Monoaxially strelched shaped article of polytetrafluoroethylene |
| 10/10/1990 | EP0391887A2 Monoaxially stretched shaped article of polytetrafluoroethylene |
| 10/10/1990 | EP0391835A2 The utilization of polyester in place of lead for use as a sheathing material for curing long length hose |
| 10/09/1990 | US4961892 Device for extruding homogeneous plastic articles and process manufacturing homogeneous articles therewith |
| 10/06/1990 | CA2013122A1 Monoaxially stretch shaped article of polytetrafluoroethylene and process for producing the same |
| 10/04/1990 | WO1990011327A2 Process for manufacturing plastic parts, in particular pipes, and diluted mixture for implementing the process |
| 09/20/1990 | DE3908798A1 Verfahren zur herstellung von kunststoffteilchen, insbesondere rohren, sowie verschnittmischung zur durchfuehrung des verfahrens Process for the manufacture of plastics, in particular pipes and waste-mix for performing the method |
| 09/19/1990 | CN1009630B Extrusion apparatus for plastic tube with compound wall and method producing plastic tube by this apparatus |
| 09/18/1990 | US4957584 Apparatus for forming endless loops from sheet material |
| 09/18/1990 | US4957570 Butt-welding of pipes |
| 09/09/1990 | WO1990010410A1 Method and apparatus for the manufacture of shaped products of biaxially oriented polymeric material |
| 09/05/1990 | EP0385479A2 Apparatus for producing pipes with a helical rib |
| 08/28/1990 | US4952362 Method and apparatus for the production of pipe |