ES516347A0 - "procedimiento para la fabricacion continua de un tubo hendido longitudinalmente a partir de una banda de material esponjoso termoplastico". - Google Patents

"procedimiento para la fabricacion continua de un tubo hendido longitudinalmente a partir de una banda de material esponjoso termoplastico".

Info

Publication number
ES516347A0
ES516347A0 ES516347A ES516347A ES516347A0 ES 516347 A0 ES516347 A0 ES 516347A0 ES 516347 A ES516347 A ES 516347A ES 516347 A ES516347 A ES 516347A ES 516347 A0 ES516347 A0 ES 516347A0
Authority
ES
Spain
Prior art keywords
pipe
thermoplastic
closure
continuous manufacture
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES516347A
Other languages
English (en)
Other versions
ES8400696A1 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6143887&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES516347(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of ES516347A0 publication Critical patent/ES516347A0/es
Publication of ES8400696A1 publication Critical patent/ES8400696A1/es
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/58Snap connection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36Bending and joining, e.g. for making hollow articles
    • B29C53/38Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B29C53/52Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively using external forming surfaces, e.g. sleeves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/02Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022Mechanical pre-treatments, e.g. reshaping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114Single butt joints
    • B29C66/1142Single butt to butt joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49Internally supporting the, e.g. tubular, article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/106Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined using flames coming in contact with at least one of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2005/00Elements of slide fasteners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/22Tubes or pipes, i.e. rigid
    • B29L2023/225Insulated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/74Auxiliary operations
    • B31B70/81Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813Applying closures
    • B31B70/8131Making bags having interengaging closure elements
    • B31B70/8132Applying the closure elements in the machine direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007Running or continuous length work
    • Y10T156/1008Longitudinal bending
    • Y10T156/1013Longitudinal bending and edge-joining of one piece blank to form tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)
ES516347A 1981-10-10 1982-10-08 "procedimiento para la fabricacion continua de un tubo hendido longitudinalmente a partir de una banda de material esponjoso termoplastico". Expired ES8400696A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3140388A DE3140388C2 (de) 1981-10-10 1981-10-10 Verfahren und Vorrichtung zum kontinuierlichen Herstellen eines längsgeschlitzten Rohres aus einer Bahn aus einem thermoplastischen Schaumstoff

Publications (2)

Publication Number Publication Date
ES516347A0 true ES516347A0 (es) 1983-11-01
ES8400696A1 ES8400696A1 (es) 1983-11-01

Family

ID=6143887

Family Applications (1)

Application Number Title Priority Date Filing Date
ES516347A Expired ES8400696A1 (es) 1981-10-10 1982-10-08 "procedimiento para la fabricacion continua de un tubo hendido longitudinalmente a partir de una banda de material esponjoso termoplastico".

Country Status (6)

Country Link
US (1) US4419158A (es)
EP (1) EP0076929B1 (es)
AT (1) ATE12367T1 (es)
CA (1) CA1200356A (es)
DE (2) DE3140388C2 (es)
ES (1) ES8400696A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2595617B1 (fr) * 1986-03-17 1988-09-09 Gefrem Dispositif de fermeture a pression pour reunir les bords de nappes en matiere plastique
US5421371A (en) * 1993-04-19 1995-06-06 Nmc Of North America, Inc. Multi-layered bonded closure system for foam tubes or profiles
WO2010151774A1 (en) 2009-06-25 2010-12-29 Nomaco Inc. Self-adjusting insulation, including insulation particulary suited for pipe or duct
US9157566B2 (en) 2012-05-11 2015-10-13 Nomaco Inc. Insulation systems employing expansion features to insulate elongated containers subject to extreme temperature fluctuations, and related components and methods

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1162543B (de) * 1964-02-06 Plummer Walter A Verfahren zur Herstellung von Plastikhuellrohren
US3650868A (en) * 1968-03-27 1972-03-21 Furukawa Electric Co Ltd Methods and apparatus for manufacturing pipe-shaped articles from foamed thermoplastic resin
DE1915768C3 (de) * 1968-03-27 1974-02-07 The Furukawa Electric Co., Ltd., Tokio Verfahren und Vorrichtung zum kontinuierlichen Herstellen eines röhrenförmigen Gegenstandes aus einer Bahn aus geschäumten thermoplastischem Harz
US3575769A (en) * 1968-03-27 1971-04-20 American Can Co Tube side seaming method and apparatus
US3853671A (en) * 1972-07-25 1974-12-10 S Ausnit Apparatus for making multiple plastic bags with reclosable fastener thereon
CA997260A (en) * 1973-12-13 1976-09-21 Robert N. Poole Tube forming apparatus and process
DE2512755B1 (de) * 1975-03-22 1976-09-23 Freudenberg Carl Fa Isolierschale
DE2532406C3 (de) * 1975-07-19 1980-04-10 Dynamit Nobel Ag, 5210 Troisdorf Verfahren und Vorrichtung zum kontinuierlichen Herstellen eines Rohres aus einer Bahn aus einem thermoplastischen Schaumstoff
FR2329439A1 (fr) * 1975-11-03 1977-05-27 Flexico France Sarl Procede et machine pour la reunion d'une feuille a au moins une bande portant un profile d'accouplement, les produits obtenus et leurs parties
DE2645771A1 (de) * 1976-10-09 1978-04-13 Nikisch Horst Verfahren und vorrichtung zur kontinuierlichen rohrherstellung

Also Published As

Publication number Publication date
US4419158A (en) 1983-12-06
DE3140388C2 (de) 1984-08-09
EP0076929A1 (de) 1983-04-20
ATE12367T1 (de) 1985-04-15
DE3140388A1 (de) 1983-04-28
ES8400696A1 (es) 1983-11-01
DE3262804D1 (en) 1985-05-02
CA1200356A (en) 1986-02-11
EP0076929B1 (de) 1985-03-27

Similar Documents

Publication Publication Date Title
BE889852A (fr) Procede et appareil en vue de faconner les extremites d'un tube en matiere thermoplastique enroule en spirale et tuyau ainsi realise
MA21356A1 (fr) Bande profilee en matiere plastique.
RU94045957A (ru) Способ сварки при изготовлении спирально-навитой трубы и сварочная головка для осуществления этого способа
SE8302099D0 (sv) Termometerskydd
ES469372A1 (es) Metodo para la fabricacion de un tubo de material plastico provisto de conductos longitudinales en su pared
NO903109L (no) Innretning og fremgangsmaate til fremstilling av roerlegemer
IT7951201A0 (it) Manicotto di saldatura per pezzi formati, in particolare tubi, in materiale termoplastico
SE8203186L (sv) Forfarande for framstellning av ett vermeisolerat ledningsror
BR8205593A (pt) Dispositivo para a fabricacao de tubos de material sintetico termoplastico
ES492959A0 (es) Un procedimiento y un dispositivo para la formacion de un cierre final en una pieza de material tubular plegados y reco-gidos en forma de oruga,especialmente tripa sintetica para
ES516347A0 (es) "procedimiento para la fabricacion continua de un tubo hendido longitudinalmente a partir de una banda de material esponjoso termoplastico".
BR8900759A (pt) Aparelho para formar lances selados de tubo metalico revestido de plastico
CA1086038A (en) Method for manufacturing tubes provided with an insulating covering made of foam plastic
JPS5628825A (en) Method of stretching thermoplastic film material
ZA795036B (en) Composite material consisting of polyvinylidene fluoride and incompatible thermoplastic and process for obtaining this material by coextrusion
ATE61279T1 (de) Verfahren und vorrichtung zur herstellung von rohrkoerpern, insbesondere fuer verpackungstuben.
BR8004814A (pt) Dispositivo para a fabricacao de bolsas ou pecas tubulares a partir de uma faixa de duas camadas de material termoplastico
IT1143139B (it) Procedimento ed apparecchio per la formazione di giunti rivestiti in ternamente in materiale plastico per tubi e simili
BR7901470A (pt) Processo e dispositivo para confeccionar saquinhos a partir de folhas continuas de material em forma tubular ou semi-tubular
JPS57151367A (en) Flexible veneer and its manufacture
MX9302913A (es) Un metodo mejorado para hacer un cuerpo tubular laminado.
ES495059A0 (es) Procedimiento para la fabricacion de una longitud de tuberiade material termoplastico de seccion transversal circular
JPS5452183A (en) Method of producing body of tubular vessel
IT7905277A0 (it) Piegatura. metodo e attrezzatura per la piegatura di tubi in materiale termoplastico con rigenerazione della sezione nella zona di
JPS52138572A (en) Method of repairing pipe made of thermoplastic synthetic resin

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970519