FR2240105A1 - Welding metallised thermoplastic laminates into hollow profiles - using selective induction heating and concentric mandrels - Google Patents

Welding metallised thermoplastic laminates into hollow profiles - using selective induction heating and concentric mandrels

Info

Publication number
FR2240105A1
FR2240105A1 FR7427120A FR7427120A FR2240105A1 FR 2240105 A1 FR2240105 A1 FR 2240105A1 FR 7427120 A FR7427120 A FR 7427120A FR 7427120 A FR7427120 A FR 7427120A FR 2240105 A1 FR2240105 A1 FR 2240105A1
Authority
FR
France
Prior art keywords
induction heating
hollow profiles
welding
selective induction
metallised
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
FR7427120A
Other languages
French (fr)
Other versions
FR2240105B3 (en
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.)
Hoechst AG
Original Assignee
Hoechst 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
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of FR2240105A1 publication Critical patent/FR2240105A1/en
Application granted granted Critical
Publication of FR2240105B3 publication Critical patent/FR2240105B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/366—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a coating or being printed, e.g. being applied as a paint or forming a printed circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/72—General 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
    • B29C66/723—General 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 multi-layered
    • B29C66/7232—General 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 multi-layered comprising a non-plastics layer
    • B29C66/72321—General 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 multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General 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
    • B29C66/71—General 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

Laminates of plastic sheet or film with metallic interlayers (coatings) welded into hollow profiles by selective induction heating to generate heat in the interlayers. Heat losses from the plastic surfaces are controlled by also using induction heating on the thin wall (0.3-1.0mm) metallic internal and/or external mandrel used. The inner and/or outer mandrel may have a flexible sleeve or lining which can be inflated pneumatically or hydraulically to pressurise and consolidate the heated laminate into a welded structure. The mounting of the sleeve or liming should permit axial rotation The induction coil may be a single loop profile for traversing the length of the profile, or may be a helical element, pref. operating at =10 kHz. For mfr or e.g. impermeable containers from e.g. layers of polypropylene film metallised with an Al coating, where dimensional tolerances are tight.
FR7427120A 1973-08-06 1974-08-05 Welding metallised thermoplastic laminates into hollow profiles - using selective induction heating and concentric mandrels Granted FR2240105A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732339707 DE2339707A1 (en) 1973-08-06 1973-08-06 METHOD AND DEVICE FOR WELDING METAL LAYERS CONTAINING COMPOSITE FILMS TO HILL BODIES

Publications (2)

Publication Number Publication Date
FR2240105A1 true FR2240105A1 (en) 1975-03-07
FR2240105B3 FR2240105B3 (en) 1977-06-03

Family

ID=5888994

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7427120A Granted FR2240105A1 (en) 1973-08-06 1974-08-05 Welding metallised thermoplastic laminates into hollow profiles - using selective induction heating and concentric mandrels

Country Status (12)

Country Link
JP (1) JPS5045062A (en)
AR (1) AR203488A1 (en)
AU (1) AU7142374A (en)
BE (1) BE818506A (en)
CH (1) CH568837A5 (en)
DE (1) DE2339707A1 (en)
DK (1) DK415774A (en)
ES (1) ES428978A1 (en)
FR (1) FR2240105A1 (en)
IT (1) IT1018815B (en)
LU (1) LU70664A1 (en)
NL (1) NL7410116A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577008A1 (en) * 1985-02-04 1986-08-08 Commissariat Energie Atomique DEVICE FOR FIXING A TUBE BY FORMING A BOURRELET, METHOD OF MAKING SAID BOURRELET, AND DEVICES FOR IMPLEMENTING THE METHOD
EP0264012A2 (en) * 1986-10-15 1988-04-20 KMK Karl Mägerle Lizenz AG Process for lap-joining the edges of a multilayered film, and tubular article produced by this process
NL1030304C2 (en) * 2005-10-28 2007-05-03 Kok & Van Engelen Composite St Electromagnetic welding method for thermoplastic parts, comprises pressing parts against die while guiding inductor so that Foucault currents are induced in conductive component

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030595A1 (en) * 1980-08-11 1982-03-04 Mannesmann AG, 4000 Düsseldorf METHOD FOR PRODUCING INSIDE AND OUTSIDE PLASTIC-COVERED CORROSION-PROTECTED MULTIPLE PIPES
DE3105146C2 (en) * 1981-02-12 1983-07-14 Automation Industrielle S.A., 1896 Vouvry Method and device for the continuous production of endless, deformable tubes from a laminate film strip
DE3219749A1 (en) * 1982-05-26 1983-12-01 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR WELDING A LID TO A CONTAINER HULL
US4541891A (en) * 1982-09-30 1985-09-17 William C. Heller, Jr. Method and apparatus for heat sealing plastic members
JPH07108554B2 (en) * 1986-05-08 1995-11-22 株式会社新素材総合研究所 Adhesion method
AU681398B2 (en) * 1994-06-29 1997-08-28 J.L. Howell A fold-back pipe-joiner
ATE340644T1 (en) * 1998-11-18 2006-10-15 Haldor Topsoe As METHOD FOR PRODUCING AN OBJECT WITH A CATALYTIC SURFACE LAYER
NL2000615C2 (en) * 2007-04-26 2008-10-28 Kok & Van Engelen Composite St Method and device for electromagnetic welding of molded parts.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577008A1 (en) * 1985-02-04 1986-08-08 Commissariat Energie Atomique DEVICE FOR FIXING A TUBE BY FORMING A BOURRELET, METHOD OF MAKING SAID BOURRELET, AND DEVICES FOR IMPLEMENTING THE METHOD
EP0193425A1 (en) * 1985-02-04 1986-09-03 Commissariat A L'energie Atomique Process for affixing a thin walled pipe between a conical ring and a conical sleeve, and devices for carrying out the process
EP0264012A2 (en) * 1986-10-15 1988-04-20 KMK Karl Mägerle Lizenz AG Process for lap-joining the edges of a multilayered film, and tubular article produced by this process
WO1988002691A2 (en) * 1986-10-15 1988-04-21 Kmk Karl Mägerle Lizenz Ag Process for connecting overlapping edges of a multilayer foil, and tube made according to the process
WO1988002691A3 (en) * 1986-10-15 1988-07-28 Maegerle Karl Lizenz Process for connecting overlapping edges of a multilayer foil, and tube made according to the process
EP0264012A3 (en) * 1986-10-15 1988-09-14 Kmk Karl Magerle Lizenz Ag Process for lap-joining the edges of a multilayered film, and tubular article produced by this process
NL1030304C2 (en) * 2005-10-28 2007-05-03 Kok & Van Engelen Composite St Electromagnetic welding method for thermoplastic parts, comprises pressing parts against die while guiding inductor so that Foucault currents are induced in conductive component

Also Published As

Publication number Publication date
BE818506A (en) 1975-02-05
FR2240105B3 (en) 1977-06-03
DK415774A (en) 1975-03-24
IT1018815B (en) 1977-10-20
CH568837A5 (en) 1975-11-14
LU70664A1 (en) 1976-08-19
JPS5045062A (en) 1975-04-22
DE2339707A1 (en) 1975-02-27
AR203488A1 (en) 1975-09-15
AU7142374A (en) 1976-01-22
ES428978A1 (en) 1976-09-01
NL7410116A (en) 1975-02-10

Similar Documents

Publication Publication Date Title
US3524779A (en) Method of making wound tubular products
US4579617A (en) Method of manufacturing tanks, containers, pipes, etc.
FR2240105A1 (en) Welding metallised thermoplastic laminates into hollow profiles - using selective induction heating and concentric mandrels
US2406051A (en) Apparatus for producing corrugated structures
US3075868A (en) Method of bonding polymer plastics to substrate webs of dissimilar materials
US3620869A (en) Method of making tubes
NO136277B (en)
US3274905A (en) Method of making a composite container
CA2431542A1 (en) Insulated beverage or food container
GB1430393A (en) Laminated articles
GB1503258A (en) Champion international corp laminate foils and the production of packages
US3785899A (en) Method for the manufacture of cellular material for cushioning and other purposes
US2998339A (en) Production of tubes and structural shapes from metal foils
US3329173A (en) Tubular reinforced plastic members
FR2111818B1 (en)
US3399094A (en) Method for forming tubular reinforced plastic members
US3196762A (en) Method of making containers
DE3063832D1 (en) Heat-insulated pipe and process for its manufacture
FR2221259A1 (en) Tube mfre. from composite metal and plastics sheet - using only induction heating of metal layer
US3407107A (en) Apparatus for forming tubular reinforced plastic members
JPH04232015A (en) Manufacture of laminated cylindrical product
GB1295292A (en)
GB1501830A (en) T-welding or butt-welding of plastics laminates
KR910021298A (en) Tubular body and its manufacturing method
FR2077902A1 (en) Wood laminates mfre - as continuous straight or curved profiles without overstraining any plies

Legal Events

Date Code Title Description
ST Notification of lapse