EP0014686A1 - Verfahren zur Umhüllung wenigstens eines longitudinalen Teils der Oberfläche wenigstens eines länglichen Leiterelementes mit wenigstens einer Isolierschicht sowie Vorrichtung zur Durchführung dieses Verfahrens - Google Patents

Verfahren zur Umhüllung wenigstens eines longitudinalen Teils der Oberfläche wenigstens eines länglichen Leiterelementes mit wenigstens einer Isolierschicht sowie Vorrichtung zur Durchführung dieses Verfahrens Download PDF

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Publication number
EP0014686A1
EP0014686A1 EP80810036A EP80810036A EP0014686A1 EP 0014686 A1 EP0014686 A1 EP 0014686A1 EP 80810036 A EP80810036 A EP 80810036A EP 80810036 A EP80810036 A EP 80810036A EP 0014686 A1 EP0014686 A1 EP 0014686A1
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EP
European Patent Office
Prior art keywords
particles
coated
drum
contact
layer
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.)
Ceased
Application number
EP80810036A
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English (en)
French (fr)
Inventor
Claude Guignard
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.)
Battelle Memorial Institute Inc
Original Assignee
Battelle Memorial Institute Inc
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 Battelle Memorial Institute Inc filed Critical Battelle Memorial Institute Inc
Publication of EP0014686A1 publication Critical patent/EP0014686A1/de
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0033—Apparatus or processes specially adapted for manufacturing conductors or cables by electrostatic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0281—After-treatment with induction heating

Definitions

  • the subject of the present invention is a method for coating at least one insulating layer with at least a longitudinal portion of the surface of at least one elongated conductive element, as well as an installation for carrying out this method.
  • electrostatic processes are particularly well suited for continuously coating elongated conductive elements of relatively large lateral dimensions, such as metal strips or sheets, since the coating can then in this case be implemented by scrolling these metal bands at the level of the bodies responsible for ensuring the electrostatic deposition of the particles, this scrolling being able, moreover, to be operated at relatively high speeds (electrostatic processes in fact implying in principle no limitation as to the speed of scrolling of the items to be coated).
  • electrostatic processes in fact implying in principle no limitation as to the speed of scrolling of the items to be coated.
  • the implementation of such electrostatic processes however becomes more problematic to carry out as it is a question of coating elongate elements of relatively smaller lateral dimensions.
  • electrostatic deposition can only be carried out satisfactorily if the dimensions of the article to be coated serving as a passive electrode remain relatively large compared to those of the corona organ serving as active electrode, this deposition
  • the electrostatic coating methods mentioned above have the additional disadvantage of remaining practically limited to the deposition of monolayers, since the electrically charged particles constituting the first layer then tend to oppose the deposition of subsequent layers (by exerting electrostatic repulsion on particles intended to constitute these subsequent layers), so that such processes can only give rise to thin coatings (depending on the particle size of the particles deposited).
  • the object of the present invention is precisely to at least partially remedy the aforementioned drawbacks, by proposing a method for coating elongated conductive elements, which is capable of allowing the elongation of elongate elements of very small lateral dimensions, while also being capable of allow the implementation of high running speeds and / or obtaining relatively thick coatings.
  • the present invention also relates to an installation for the implementation of such a method.
  • the present invention finally relates to a slender element coated according to such a method.
  • the expression “electrically insulating thermoplastic material” intends to designate all the types of electrically insulating materials normally present in the form solid at room temperature, which have the property of softening under the action of heat and harden on cooling. This expression must therefore be understood in a much more general sense than that under which it is usually understood in the field of plastics. It thus intends in particular to include both organic insulating materials such as most of the so-called “plastic” materials as well as inorganic insulating materials such as the various types of glass.
  • the expression “particles made of an insulating thermoplastic material” means meanwhile very finely divided parts of the material as defined above.
  • one of the essential characteristics of the process which has just been defined resides in the use of an electrically conductive intermediate support, which intermediate support makes it possible to produce the desired coating by application of two successive stages, namely first of all electrostatic deposition of a layer of insulating thermoplastic particles on the surface of the intermediate support, followed by the transfer of at least part of these particles onto the desired longitudinal portion of the elongate element to be coated, by placing in contact with the surface thus coated with particles of the intermediate support with said desired longitudinal portion of the elongate element.
  • the electrostatic deposition of the layer of insulating thermoplastic particles on the surface of the electrically conductive intermediate support can be carried out by any suitable known electrostatic method, the insulating thermoplastic particles being able, moreover, according to the method used, to be electrically charged before d 'be deposited on the intermediate support or on the contrary only after being deposited on this intermediate support.
  • the electrical charge of these particles is in all cases ensured, whatever the method used, by a corona discharge member disposed at a distance from the electrically conductive intermediate support, this intermediate support being normally connected to ground, while the member corona is brought to a high potential, which can be either positive (in order to positively charge the insulating thermoplastic particles), or preferentially negative (in order to negatively charge these particles).
  • the electrical charge of these insulating particles has in particular the function of allow them to remain fixed to the electrically conductive intermediate support by electrostatic adhesion, after being deposited on the latter.
  • the transfer to the desired longitudinal portion of the elongate element to be coated with at least a portion of the particles thus fixed electrostatically on the intermediate support can then in principle be effected by simple contacting of this intermediate support with said desired longitudinal portion .
  • the intermediate support as well as the elongated conductive element to be coated being normally both connected to ground, the probability that the electrically charged particles can go to be fixed electrostatically on the elongate element is indeed of the same order of magnitude as that for that these particles remain fixed electrostatically to the intermediate support, so that about half of the particles thus brought into contact is transferred to the elongate element.
  • Such a random transfer can nevertheless be considerably improved, by providing for applying to the elongate element any suitable pretreatment capable of forcing the particles brought into contact with it to be permanently fixed therein.
  • any suitable pretreatment capable of forcing the particles brought into contact with it to be permanently fixed therein.
  • pretreatments it is thus possible, by way of example, to apply pretreatments such as preheating of the elongate element (so as to soften the particles brought into contact sufficiently so that they adhere to them in a suitable manner), or although still pre-sizing of the elongate element (that is to say prior deposition of a layer of adhesive intended to force the particles brought later in its contact to adhere to it definitively).
  • the elongate element is then in principle cooled, so as to harden the continuous coating thus obtained. Before operating such cooling, it is still possible, however, if necessary, to apply to this continuous coating which is not yet hardened any suitable additional known operation intended to allow a well-defined type of coating to be obtained.
  • the method according to the invention is particularly well suited for coating elongated conductive elements with small lateral dimensions, such as metallic wires or ribbons, taking into account that the electrostatic deposition is here carried out indirectly on the intermediate support electrically conductor (which intermediate support can retain relatively large dimensions compared to the corona member used in this electrostatic deposition), and no longer directly on the elongated element to be coated as in the prior art.
  • these elongated elements of small lateral dimensions, it is also possible to envisage carrying out both the coating of a single elongated element, as well as the simultaneous coating of a plurality of adjacent elongate elements extending parallel to each other in the same plane (for example with a view to producing a complex structure consisting of a plurality of conductors coated in a single insulating sheath).
  • the method according to the invention is nonetheless also capable of being used for coating elongated conductive elements with larger lateral dimensions, such as metal strips or sheets.
  • a coating extending over the entire surface of the elongate element to be coated for example circumferential coating of a metal wire, or coating on both sides of a tape or a metal strip
  • a coating extending only over a longitudinal portion of this surface for example coating on one side of a tape metal, or partial coating, in any desired configuration, of one or both sides of a metal strip or sheet.
  • the coating can also e p sider to achieve both a coating "monolayer” of small thickness, a “multi-layer” coating of greater thickness, each of the layers of this "multilayer” coating which can furthermore be constituted by an identical insulating thermoplastic material, or on the contrary by a succession of different insulating thermoplastic materials (with a view to producing, for example, a composite coating in its thickness).
  • the production of such a "multilayer” coating can simply be obtained by repetitive application of the process as defined above, however advantageously providing in such a case for carrying out an intermediate heating operation of the wire between two successive transfers of particles. , so as to soften the layer of particles previously deposited sufficiently so that the particles subsequently transferred can adhere to it in a suitable manner, despite the electrostatic repulsion likely to be exerted by this layer previously deposited which is still electrically charged.
  • both a coating made of a single material extending over the entire length of the elongate element to be coated as a coating made of different materials extending alternately along the length of this elongate element (production, for example, of conductive wires provided with an insulating coating comprising colored marks arranged at regular intervals along these wires, the color of these marks can be different for each wire so as to allow their later identification).
  • the coating of elongate conductive elements by the process according to the invention can in principle be carried out both by a discontinuous process and by a continuous process (the coating according to a discontinuous process can for example be carried out using as an intermediate support a support in the form of a plate). It will however be chosen, in a very particularly advantageous manner, to carry out such a coating according to a continuous process, by axially scrolling the elongate element to be coated in a predetermined direction, and then planning to use at least one carrier as an intermediate support.
  • an electrically conductive external surface such as for example a cylindrical metal drum rotatably mounted around its own axis, this drum then being arranged so as to be substantially in contact by its external cylindrical surface with the longitudinal portion to be coated with the elongate element in travel while extending substantially transversely to the direction of travel of the latter.
  • the continuous coating of this longitudinal portion can then essentially be obtained by ef effecting the electrostatic deposition of the layer of insulating thermoplastic particles in an area of the surface of the drum remote from the area of contact of the latter with the elongate element, and by driving the drum in rotation in the direction of travel of the element elongated, at a speed such that its peripheral speed is substantially identical to the speed of travel of the elongate element so as to allow, as the elongate element scrolls, the continuous transfer of at at least part of the insulating particles of the drum on the longitudinal portion to be coated with the elongate element.
  • Such a continuous coating process has the major advantage of allowing particularly high running speeds to be implemented.
  • the continuous coating process described above can give rise to very diverse coatings, depending on the number and the arrangement of the rotary drums used as intermediate supports. It will thus be possible, for example, to envisage making cladding circumferentially coating metallic wires, by providing for the use of at least one pair of rotary drums arranged on either side of the wire (or even a second pair arranged downstream and 90 ° from the first pair), or coverings covering the two faces of metal ribbons or bands, by providing for the use of at least one pair of rotary drums arranged against each of the faces of these ribbons or bands, or coverings covering only one of the faces of these ribbons or bands, by providing to have rotary drums only against this face to be covered.
  • FIGS 1 to 3 illustrate a first embodiment of an installation for implementing the method according to the invention, intended to allow an insulating coating "monolayer" of a single metal wire.
  • This installation comprises a supply coil I of bare metal wire 2.
  • This metal wire 2 which unwinds from the coil I travels, through a whole series of devices which will be described below, a path which leads it to to a storage reel 3, on which it is rewound.
  • the metal wire 2 which is connected to the ground by means of a sliding contact 5, is extracted from the coil 1 by a supply pulley 4, responsible for communicating to the wire 2 a well-defined running speed.
  • the wire 2 thus extracted from the coil I first passes to the right of a preheating device 6, which is in this example constituted by an electrical resistance.
  • the wire 2 thus preheated then passes through a coating device 7, which consists of two identical halves 7a and 7b respectively arranged in line with two opposite portions of wire 2, for example respectively in line with the upper and lower portions of this wire 2.
  • a coating device 7 which consists of two identical halves 7a and 7b respectively arranged in line with two opposite portions of wire 2, for example respectively in line with the upper and lower portions of this wire 2.
  • These two halves 7a and 7b being identical, we will only describe in detail only one of them, in the occurrence half 7a arranged in line with the upper portion of the wire.
  • the upper coating device 7a comprises a cylindrical metal drum 8a rotatably mounted around its own axis.
  • This drum 8a is located transversely to the wire 2, while being arranged so as to be substantially in contact by its external cylindrical surface with the upper portion of the wire 2.
  • the drum 8a which is connected to ground via of a sliding contact 9a, is intended to be driven in rotation in the direction of travel of the wire by an electric motor IOa (direction of rotation indicated by an arrow in the drawing), with a speed of rotation such that its peripheral speed is substantially identical to the thread speed.
  • an electric motor IOa direction of rotation indicated by an arrow in the drawing
  • Plumbing the upper part of the drum 8a (that is to say plumbing the part of this drum substantially diametrically opposite to that in contact with the wire) is also arranged an electrostatic powdering member. 12a, comprising an insulating chamber 13a intended to contain an insulating thermoplastic powder i4.
  • This insulating chamber 13a which is provided with a powder admission orifice 15a as well as a powder ejection nozzle 16a pointing towards the upper part of the drum 8a, is further crossed by a corona electrode 17a the tip-shaped end of which comes out into the ejection nozzle 16a.
  • This corona electrode 17a is connected by its other end to the negative pole of a direct high voltage source 18a, the other positive pole of which is connected to ground.
  • the upper coating device 7a finally comprises an insulating screen 19a, arranged substantially halfway up the drum 8a so as to come to be interposed between the powdering member 12a and the metal wire 2.
  • the lower coating device 7b essentially consists, in a similar manner, of a metallic cylindrical drum 8b also connected to the ground, arranged so as to be substantially in contact by its external cylindrical surface with the lower portion of the wire 2; as well as an electrostatic powdering member 12b provided with a corona electrode 17b, disposed substantially in line with the part bottom of drum 8b.
  • the electrostatic powdering members 12a and 12b of the respective coating devices 7a and 7b have the function of ensuring, in a well known manner, the continuous deposition of a layer of insulating thermoplastic particles 14 on the part located opposite screws of the respective drums 8a and 8b, the corona electrodes 17a and 17b of these members 12a and 12b more specifically having the function of ensuring the electrical charge of the particles 14 emerging from the ejection nozzles 16a and 16b, and these particles thus charged 14 then being conveyed along the field lines to the part located opposite the external cylindrical surface of the respective drums 8a and 8b (part on which they then remain fixed by electrostatic adhesion).
  • Such electrostatic deposition is able to take place under particularly satisfactory and regular conditions, thanks in particular to the fact that the dimensions of the respective drums 8a and 8b (and in particular their axial length) can be chosen sufficiently large compared to those of the corona electrodes 17a and 17b (fig. 2), so as to avoid any risk of the appearance of an inverse corona effect.
  • the layers of particles 14 thus deposited on the respective drums 8a and 8b are then conveyed continuously, due to the rotation of these drums, to the vicinity of the preheated wire 2.
  • Those of these particles which arrive in direct contact (fig 3) with the respective upper and lower portions of the preheated wire 2 are then forced to fix on these wire portions, due to the preheating of the latter (preheating causing a certain softening of the particles brought into contact with the wire, the thus binding to adhere permanently to the thread).
  • the other particles which have not directly contacted the wire 2 remain attached to the respective drums 8a and 8b, from which they are then removed by the scrapers Ila and Ilb, so that the above-described deposition-transfer process can continue continuously.
  • the wire 2, the upper and lower portions of which are thus covered with particles 14 then passes through a heating device 2i, constituted in this example by an electric heating body.
  • This heating device 21 is intended to bring the wire 2 to a temperature sufficient to melt the particles 14 into a continuous sheath around the wire 2 (continuous sheath surrounding the entire periphery of the wire).
  • the wire 2 thus covered with its continuous sheath finally passes through a cooling device 22 intended to harden the continuous sheath thus obtained.
  • the cooling device 22 can for example be constituted by a channel supplied with cooling air.
  • the wire 2 provided with its hardened insulating sheath is finally rewound on the storage reel 3.
  • the thickness of the insulating sheath thus obtained is essentially a function of the particle size of the powder 14 used.
  • the thickness of this sheath can however be more or less modulated at will, for a predetermined particle size, by choosing to drive the respective drums 8a and 8b at a speed slightly higher, or on the contrary slightly lower, at the running speed of the wire 2 (thus making it possible to obtain a certain effect of contraction, or on the contrary of spreading, of the particles along the wire, and therefore a certain modification of the thickness of the final sheath).
  • FIG. 4 illustrates a possible variant of a detail of the installation previously described, according to which drums 8a and 8b are used provided on their external cylindrical surface with circular grooves 23 (instead of using smooth drums as previously).
  • Figures 5 and 6 illustrate another variant of the installation described above, intended to allow the formation (Fig. 6) of a cable 31 consisting of a plurality of conductive wires 32 embedded in a single insulating sheath 33.
  • L installation making it possible to obtain such a cable 31 is identical in all respects to that described in FIGS. I to 3, apart from the fact that the single wire 2 drawn from the supply coil I is here replaced (fig. 5) by a plurality of adjacent wires 32 arranged to extend parallel to each other in the same plane.
  • FIG. 7 illustrates yet another variant of the installation previously described in FIGS. 1 to 3, intended to allow the production of a coating covering only one face with a metal strip.
  • the installation making it possible to obtain such a coating remains identical in all respects to that described in FIGS. 1 to 3, apart from the fact that the wire 2 drawn from the supply reel ballast here replaced by a metallic strip 35, however that the lower coating device 7b is here eliminated and advantageously replaced by a simple guide roller 36.
  • FIG. 8 illustrates a second embodiment of an installation for implementing the method according to the invention, intended to allow the production of a "bilayer" coating on the two faces of a metal strip.
  • This installation is identical in all respects to that shown in FIGS. 1 to 3, apart from the fact that the wire 2 drawn from the supply coil is here replaced by a metallic strip 42, and that downstream of the first device coating 7 is located here arranged a second coating device 7 '(consisting of two identical halves 7'a and 7'b) in all points similar to the first coating device 7, however that between the two devices 7 and 7' there is also interposed an intermediate heating device 43, intended to heat the ribbon 42 covered with the first layer of particles to a temperature sufficient to allow subsequent adhesion of the second layer of particles (despite the electrostatic repulsion liable to be exerted by the first layer still electrically charged).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP80810036A 1979-02-08 1980-02-04 Verfahren zur Umhüllung wenigstens eines longitudinalen Teils der Oberfläche wenigstens eines länglichen Leiterelementes mit wenigstens einer Isolierschicht sowie Vorrichtung zur Durchführung dieses Verfahrens Ceased EP0014686A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1223/79 1979-02-08
CH122379 1979-02-08

Publications (1)

Publication Number Publication Date
EP0014686A1 true EP0014686A1 (de) 1980-08-20

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EP80810036A Ceased EP0014686A1 (de) 1979-02-08 1980-02-04 Verfahren zur Umhüllung wenigstens eines longitudinalen Teils der Oberfläche wenigstens eines länglichen Leiterelementes mit wenigstens einer Isolierschicht sowie Vorrichtung zur Durchführung dieses Verfahrens

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EP (1) EP0014686A1 (de)
WO (1) WO1980001734A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568414A1 (de) * 1992-04-23 1993-11-03 Fujikura Ltd. Vorrichtung und Verfahren zum Verbinden von Blattmaterial und ihre Anwendung bei der Herstellung flexiblen Flachkabels
EP1426981A2 (de) * 2002-12-04 2004-06-09 I & T Innovation Technology Entwicklungs- und Holding AG Kontaktieren von Endlosprodukten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936431C1 (de) * 1989-11-02 1991-01-17 Kabelmetal Electro Gmbh, 3000 Hannover, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1360679A (fr) * 1962-06-22 1964-05-08 Sames Mach Electrostat Perfectionnements au revêtement d'objets
US3301932A (en) * 1961-05-31 1967-01-31 Dow Chemical Co Method for producing coated articles
FR2346058A1 (fr) * 1976-03-31 1977-10-28 Caratsch Hans Peter Procede et dispositif de realisation d'une impregnation par points formant reseau d'un materiau en bande a partir d'une poudre de resine synthetique
US4102300A (en) * 1974-08-16 1978-07-25 S.A. Des Cableries & Trefileries De Cossonay Apparatus for continuously coating a metal wire at high velocity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301932A (en) * 1961-05-31 1967-01-31 Dow Chemical Co Method for producing coated articles
FR1360679A (fr) * 1962-06-22 1964-05-08 Sames Mach Electrostat Perfectionnements au revêtement d'objets
US4102300A (en) * 1974-08-16 1978-07-25 S.A. Des Cableries & Trefileries De Cossonay Apparatus for continuously coating a metal wire at high velocity
FR2346058A1 (fr) * 1976-03-31 1977-10-28 Caratsch Hans Peter Procede et dispositif de realisation d'une impregnation par points formant reseau d'un materiau en bande a partir d'une poudre de resine synthetique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568414A1 (de) * 1992-04-23 1993-11-03 Fujikura Ltd. Vorrichtung und Verfahren zum Verbinden von Blattmaterial und ihre Anwendung bei der Herstellung flexiblen Flachkabels
US5387298A (en) * 1992-04-23 1995-02-07 Fujikura Ltd. Apparatus and method for bonding sheet material and its application to manufacture of flexible flat cable
EP1426981A2 (de) * 2002-12-04 2004-06-09 I & T Innovation Technology Entwicklungs- und Holding AG Kontaktieren von Endlosprodukten
EP1426981A3 (de) * 2002-12-04 2004-12-01 I & T Innovation Technology Entwicklungs- und Holding AG Kontaktieren von Endlosprodukten

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Inventor name: GUIGNARD, CLAUDE