| Patents for B29L 23 - Tubular articles (4,866) |
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| 06/07/1989 | CN1004407B Device for the production of a tubular object |
| 05/23/1989 | CA1254360A1 Method and apparatus for protecting a pre-formed projecting appendage during plastic molding |
| 05/16/1989 | US4830808 Process for manufacturing shells of mineral fibers |
| 05/16/1989 | CA1254338A1 Poly(vinylidene fluoride) compositions having enhanced flexibility and their use particularly for manufacturing flexible tubes |
| 05/10/1989 | EP0315586A1 Hot runner channel injection mould for producing throw-away syringes and the like |
| 05/10/1989 | CN1032850A 连接器 Connector |
| 05/03/1989 | EP0313731A1 Method and device for welding tubular parts made from a thermoplastic material |
| 04/26/1989 | EP0312712A1 Method and device for welding the front ends of tubular thermoplastic parts together |
| 04/12/1989 | EP0310602A1 Method and extruder head for manufacturing extrusion products from melted plastic |
| 04/04/1989 | US4818551 Method of making a liquid smoke impregnated shirred casing stick |
| 04/04/1989 | US4818467 Process for cooling a tubular sleeve of thermoplastic material and a device for making use thereof |
| 03/22/1989 | CN1031812A Method and apparatus deforming reformable tubular pipe liners |
| 03/15/1989 | EP0307206A2 Heat recoverable article |
| 03/15/1989 | EP0307205A2 Conductive polymer composition |
| 03/14/1989 | US4812274 Heating and melting exterior surface only; then cooling to give uniform crystal structure through out |
| 03/08/1989 | EP0305874A2 Method and apparatus for manufacturing an extruded stretched and seamless tube |
| 03/08/1989 | EP0305664A2 Apparatus for welding tubular thermoplastic elements together |
| 03/01/1989 | EP0304572A2 Apparatus for supporting thermoplastic tubular elements during welding |
| 03/01/1989 | EP0304571A2 Method and apparatus for producing a welded joint of tubular thermoplastic elements |
| 03/01/1989 | EP0304476A1 Method of joining articles. |
| 02/23/1989 | WO1989001402A1 Process for producing heat-shrinkable polyethylene film |
| 02/15/1989 | CN1031047A Process and apparatus for manufacturing ribbed tube of plastics |
| 02/09/1989 | WO1989001109A1 Corrugated pipe connector and method of molding |
| 02/09/1989 | DE3727786A1 Verfahren und vorrichtung zum installieren einer neuen rohrleitung innerhalb einer bestehenden rohrleitung Method and apparatus for installing a new pipeline within an existing pipeline |
| 02/01/1989 | EP0301697A2 A method and apparatus for producing a deformed pipe liner of tubular cross-section. |
| 02/01/1989 | EP0301189A2 Method and apparatus for manufacturing a ribbed plastic pipe |
| 01/24/1989 | CA1249112A1 Device and process for cooling plastic sheets |
| 01/18/1989 | EP0299814A1 Method and apparatus for continuously manufacturing profiled bodies of stabilizable material by means of a mandrel and a support |
| 01/04/1989 | EP0297257A1 Equipment for producing packaging containers |
| 12/29/1988 | WO1988010191A1 Decorative article and production thereof |
| 12/15/1988 | WO1988009713A1 Process for manufacturing a cock consisting of a plug and a housing for medical equipment |
| 12/15/1988 | WO1988006517A3 Method of joining articles |
| 12/15/1988 | DE3716884A1 Coextrusion head |
| 11/23/1988 | EP0291515A1 Radio frequency method of sealing an article. |
| 11/22/1988 | CA1245096A1 Process for production of a tubular sheathing section gathered into a bellows-like hollow member for processing, especially as a peel-skin for the production of small sausages, as well as the hollow members which are produced |
| 11/17/1988 | WO1988008784A1 Plastic tube with solid cross-ribs on the outer surface, a moulding device therefor; installation comprising such a device and a method for moulding a plastic tube |
| 11/17/1988 | EP0291136A1 Plastic tube with solid crossribs on the outer surface, a moulding device therefor; installation comprising such a device and a method for moulding a plastic tube |
| 11/16/1988 | CN88102551A Process and apparatus for manufacturing plastic molding products reinforced with glass fibres |
| 11/15/1988 | CA1244619A1 Heat recoverable coextruded articles |
| 11/09/1988 | EP0289781A1 Method of manufacturing fibre-reinforced plastic articles |
| 11/08/1988 | US4783299 Method and apparatus for extrusion of plastic pipes with composite walls |
| 11/02/1988 | EP0289369A1 Process for making a flexible pipe with marking and/or fixing means |
| 11/02/1988 | EP0153342B1 Method of and apparatus for producing tubular articles of biaxially oriented polymers |
| 10/25/1988 | US4779651 Plastic corrugated tube with integrally molded sleeve coupler |
| 10/19/1988 | EP0287551A1 Method of controlling the thickness of an extruded plastic article |
| 10/18/1988 | CA1243158A1 Blowing head for making tubular plastic films |
| 10/11/1988 | US4777006 Extruded from die in straight line vertical form, curved, inserted into mold and blown |
| 09/27/1988 | US4773956 Process for connecting bodies having hollow sections to molded bodies made of thermoplastic |
| 09/27/1988 | CA1242399A1 Fusion pad |
| 09/13/1988 | US4770618 Extrusion die for two-ply plastic tubing |
| 09/07/1988 | WO1988006517A2 Method of joining articles |
| 09/07/1988 | EP0281217A2 Corrugated mould block |
| 08/30/1988 | CA1241167A1 Procedure and relevant mechanical execution to obtain the folding section of a plastic drinking straw |
| 08/25/1988 | WO1988006087A1 A method and an apparatus for the production of ribbed pipes |
| 08/16/1988 | CA1240468A1 Methods and apparatus for flanging tubular polymer articles |
| 07/28/1988 | WO1988005377A1 A method and an apparatus for the extrusion of plastic pipes |
| 07/19/1988 | US4758392 Method of spin-welding |
| 07/13/1988 | EP0274424A2 Manufacture of plastic pipe having barrier properties |
| 07/13/1988 | EP0112841B1 The lining of pipelines or passageways |
| 07/06/1988 | EP0156836B1 Extruder assembly |
| 07/05/1988 | CA1238757A1 Method of bonding plastic pipes |
| 06/22/1988 | EP0271598A2 Method for molding corrugated pipe sleeve |
| 06/21/1988 | US4752208 Apparatus for molding corrugated pipe sleeve |
| 06/14/1988 | US4750873 Device for the production of a tubular object |
| 06/07/1988 | CA1237563A1 Extruder assembly |
| 06/01/1988 | EP0269345A2 Method of moulding a micropipette |
| 05/18/1988 | EP0267719A2 Method for extruding and expanding polytetrafluoroethylene tubing and the products produced thereby |
| 05/10/1988 | US4743480 Apparatus and method for extruding and expanding polytetrafluoroethylene tubing and the products produced thereby |
| 05/10/1988 | US4743420 For packaging foods; juices, frozen concentrates |
| 05/03/1988 | US4741794 Equipment for the manufacture of mainly large-diameter flexible hoses having spiralled reinforcement |
| 04/26/1988 | CA1235666A1 Method of and means for forming and sealing helically wound tubes |
| 04/21/1988 | WO1988002619A1 Radio frequency method of sealing an article |
| 04/20/1988 | EP0264102A1 Method of continuously manufacturing a double-walled tube assembly |
| 04/20/1988 | EP0263860A1 Methods and devices for fabricating and laying reinforcement armourings and curved elements reinforced with bars for elongate flexible bodies. |
| 04/12/1988 | US4737330 Process for creating internal strains in a component part of fiber-reinforced plastic layers subjected to tensile stresses |
| 04/12/1988 | US4737214 Method for providing sterile connection of plastic tubes or the like |
| 04/06/1988 | EP0262127A1 Extruder mixer |
| 04/05/1988 | US4735538 Process of forming a biaxially oriented thermoplastic tube including the formation and severance of a bubble forming a radially outwardly flared leading tube end |
| 04/05/1988 | CA1234665A1 Method and apparatus for molding hollow articles |
| 03/30/1988 | EP0261217A1 A method and an apparatus for the production of pipes. |
| 03/23/1988 | EP0260848A2 Improvements in or relating to heat-shrinkable tubular film material |
| 03/15/1988 | US4731138 Apparatus for producing double-walled corrugated pipes |
| 02/16/1988 | CA1232727A1 Process and apparatus for shirring tubular casings |
| 02/16/1988 | CA1232726A1 Method of forming bottomed cylindrical bodies from a cylindrical body of thermoplastic resin |
| 02/09/1988 | US4724111 Method for molding corrugated pipe sleeve |
| 01/26/1988 | US4721594 Method and an apparatus for the production of ribbed pipes |
| 01/26/1988 | CA1231883A1 Method of manufacturing a shape from a composite material and shapes manufactured in accordance with the method |
| 01/20/1988 | EP0253712A1 Device for fastening two cylindrical elements, in particular a pipe with a connection and method of mounting |
| 01/12/1988 | US4718844 Corrugated mold block |
| 01/05/1988 | US4717326 Extrusion molding equipment for multi-layer parison |
| 01/05/1988 | US4717324 Coinjection of hollow articles and preforms |
| 12/22/1987 | US4714578 Molding of integral socket connection in centrifugally cast fiberglass reinforced pipe |
| 12/16/1987 | CN87103629A Apparatus for producing double-walled corrugated pipes |
| 12/15/1987 | US4712993 Extrusion die for externally ribbed plastic tubing |
| 12/09/1987 | EP0248368A2 Apparatus for producing double-walled corrugated pipes |
| 12/09/1987 | EP0248306A2 Method and apparatus for blow-moulding curved plastics articles |
| 11/25/1987 | EP0246512A2 Coinjection of hollow articles and preforms |
| 11/11/1987 | EP0245125A1 Method of manufacturing tubes of polyamid showing an improved resistance to cold shocks and tensile strength |
| 11/04/1987 | CN86108107A Extrusion apparatus for plastic tube with compound wall and method producing plastic tube by this apparatus |
| 11/03/1987 | CA1228705A1 Apparatus for molding thermoplastic pipes |