EP0781170B1 - Device for projecting a magnetic element charged coating - Google Patents

Device for projecting a magnetic element charged coating Download PDF

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Publication number
EP0781170B1
EP0781170B1 EP95931244A EP95931244A EP0781170B1 EP 0781170 B1 EP0781170 B1 EP 0781170B1 EP 95931244 A EP95931244 A EP 95931244A EP 95931244 A EP95931244 A EP 95931244A EP 0781170 B1 EP0781170 B1 EP 0781170B1
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EP
European Patent Office
Prior art keywords
coating
gun
ferrite ring
magnetic
magnetic elements
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.)
Expired - Lifetime
Application number
EP95931244A
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German (de)
French (fr)
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EP0781170A1 (en
Inventor
Jean-Jacques Bodin
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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Publication of EP0781170A1 publication Critical patent/EP0781170A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties

Definitions

  • the subject of the invention is a device for project a coating loaded with magnetic elements on surfaces of sizes and complexities different.
  • the magnetic elements contained in it coating should be oriented.
  • a known method for orienting the elements magnetic coating involves placing the surface to cover in a magnetic field and then to coat this surface with the adequate coating according to a classic technique for those skilled in the art. This technique is to use a pistol projection. According to this process, when the coating comes close to the surface to cover, magnetic elements, subject to the field magnetic reigning around the surface, are placed following the field lines created by this field magnetic. The coating including the magnetic elements are oriented can then be dried or polymerized.
  • the object of the invention is precisely to remedy this disadvantage. To this end, it offers a system projection of a coating in which the field magnetic is created around the nozzle of the projection gun to orient the elements magnetic as soon as they come out of the gun.
  • the invention relates to a device for spraying a loaded coating of magnetic elements, including a pistol projection suitable for projecting the coating onto a chosen surface.
  • This projection device is characterized by the fact that it includes means orientation of the magnetic elements of the coating, these orientation means being fixed around the gun projection and ensuring the orientation of magnetic elements from out of the projection gun.
  • the means of orientation include a ferrite ring surrounding the gun projection and around which is wrapped a electrical conductor connected to a source power supply to create inside of the ferrite ring a magnetic field.
  • This ferrite ring has an air gap allowing, on the one hand, the passage of the coating when it is projected by the pistol and, on the other hand, the orientation of the magnetic elements of this projected coating.
  • the orientation means include a shield cylinder positioned between the gun and ferrite ring to protect said magnetic field gun created by the ring of ferrite, and prevent the magnetized elements obstruct the gun.
  • This shielding cylinder has an opening of section significantly greater than the section of the gap of the ferrite ring.
  • the projection device according to the invention can be on a robot.
  • the single figure schematically represents the device of the invention comprising a pistol projection surrounded by means to orient the magnetic elements of the coating.
  • This device in perspective.
  • This device includes a projection gun referenced 1.
  • This spray gun projection is of a completely classic type. he can advantageously be automatic.
  • This gun is connected to power supplies compressed air and coating, not shown on the figure for simplification.
  • This figure also shows a ring of ferrite 3 arranged around this spray gun 1.
  • This ferrite ring 3 is itself surrounded, at the less on one part, of an electrical conductor called winding wire 5.
  • This winding wire 5, of preferably copper, is wound in multi-layers around the ferrite ring 3 and connected on a power supply 8 stabilized in direct current in order to create a magnetic field in ring 3.
  • the ferrite ring 3 comprises an opening making an air gap 7. This opening allows the passage of the coating sent by the gun 1 towards the surface to be covered. The magnetic field reigning in this air gap 7 then makes it possible to orient the magnetic elements contained in the coating when the latter crosses the air gap 7 and until that it applies to the part to be coated.
  • the ferrite ring 3 is made from nickel and zinc. It has a width of 90 mm, a diameter 280 mm outside, an inside diameter of 250 mm and therefore a thickness of 15 mm.
  • the air gap 7 has a width of about 50 mm.
  • a shielding cylinder 2 is positioned between the spray gun 1 and the ferrite ring 3. More precisely, the ring of ferrite 3 is fixed, by its inner face, on the shield cylinder 2. This shield cylinder 2 is able, moreover, to support the spray gun 1 which is fixed on the inside of this cylinder.
  • this armor cylinder is made of mild steel and has a external diameter of 210 mm and a length of 200 mm.
  • the shielding cylinder 2 prevents unwanted field lines do not disturb the supply of paint, resin or spray gun slip.
  • this shielding cylinder 2 has an opening 4 substantially aligned with the air gap 7 to allow the passage of the coating from gun 1 to the surface to be covered.
  • the pistol moves parallel by in relation to opening 4, i.e. in the direction suggested by the double arrow 9.
  • the opening 4 of the shielding cylinder has a section significantly higher than that of the air gap 7 of so that the entire coating emitted by the gun 1 can be subjected to the magnetic field of air gap 7.
  • the spray gun 1 is therefore centered at inside the shielding cylinder 2 then fixed on this shield cylinder so as to be in the axis of the ferrite ring 3. In this way, the nozzle of the projection gun opens into the air gap 7.
  • the DC power supply must first be switched on so that a field magnetic be created in the air gap 7 of the ring of ferrite 3. Automatic projection of the coating can then be performed. Magnetic elements contained in the coating projected by the spray gun projection 1 are deposited on the surface to be covered after being referred from the moment of their passage in the air gap 7, until the moment of the application.
  • the nozzle of the projection gun must be about a distance from the surface to be covered 70 to 80 mm, or 20 mm from the surface outside of the ferrite ring 3.
  • the device described above is on board a robot.
  • This device therefore has the advantage of allowing the covering of all types of surfaces and, in particular, surfaces located in hostile environments since it can be installed on a robot arm.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)

Description

Domaine de l'inventionField of the invention

L'invention a pour objet un dispositif pour projeter un revêtement chargé d'éléments magnétiques sur des surfaces de tailles et de complexités différentes.The subject of the invention is a device for project a coating loaded with magnetic elements on surfaces of sizes and complexities different.

Elle trouve une application dans le domaine de la peinture industrielle.It finds an application in the field of industrial painting.

Etat de la techniqueState of the art

Dans l'industrie, il est quelquefois nécessaire de recouvrir des surfaces, souvent de dimensions importantes ou complexes, d'une peinture, d'une résine ou d'une barbotine (eau + céramique) chargée en fibres magnétiques (ou éléments magnétiques). Ces peintures ou résines chargées en fibres magnétiques sont généralement utilisées pour leurs propriétés radioélectriques spécifiques.In industry, it is sometimes necessary to cover surfaces, often of dimensions important or complex, of a painting, of a resin or a slip (water + ceramic) loaded with fibers magnetic (or magnetic elements). These paintings or resins loaded with magnetic fibers are generally used for their properties specific radioelectric.

Dans la suite de la description, on parlera, plus généralement, de revêtements chargés en éléments ou particules magnétiques et destinés à recouvrir une surface.In the following description, we will speak, more generally of coatings loaded with elements or magnetic particles and intended to cover a area.

Toutefois, pour assurer au revêtement toute son efficacité, les éléments magnétiques contenus dans ce revêtement doivent être orientés.However, to provide the coating with all of its efficiency, the magnetic elements contained in it coating should be oriented.

Un procédé connu pour orienter les éléments magnétiques du revêtement consiste à placer la surface à recouvrir dans un champ magnétique puis à revêtir cette surface avec le revêtement adéquat selon une technique classique pour l'homme du métier. Cette technique consiste à utiliser un pistolet de projection. Selon ce procédé, au moment où le revêtement arrive à proximité de la surface à recouvrir, les éléments magnétiques, soumis au champ magnétique régnant autour de la surface, se placent suivant les lignes de champ créées par ce champ magnétique. Le revêtement dont les éléments magnétiques sont orientés peut alors être séché ou polymérisé.A known method for orienting the elements magnetic coating involves placing the surface to cover in a magnetic field and then to coat this surface with the adequate coating according to a classic technique for those skilled in the art. This technique is to use a pistol projection. According to this process, when the coating comes close to the surface to cover, magnetic elements, subject to the field magnetic reigning around the surface, are placed following the field lines created by this field magnetic. The coating including the magnetic elements are oriented can then be dried or polymerized.

Un tel procédé est, cependant, difficile à mettre en oeuvre dans Industrie puisqu'il n'est guère envisageable de réaliser des dispositifs générateurs de champ magnétique suffisamment importants pour contenir des pièces de forme complexe ou de volume important.Such a process is, however, difficult to implement implemented in Industry since it is hardly conceivable to produce devices generating magnetic field large enough to contain pieces of complex shape or large volume.

Un autre système utilisé pour recouvrir une surface avec une peinture magnétique est décrit dans le document JP-A-61 122928 (abrégé). Ce système comporte un ensemble d'aimants permanents disposés à proximité de l'extrémité d'une buse d'éjection d'une peinture magnétique.Another system used to cover a surface with magnetic paint is described in the document JP-A-61 122928 (abridged). This system includes a set of permanent magnets arranged nearby the end of a paint ejection nozzle magnetic.

Exposé de l'inventionStatement of the invention

L'invention a justement pour but de remédier à cet inconvénient. A cette fin, elle propose un dispositif de projection d'un revêtement dans lequel le champ magnétique est créé aux alentours de la buse du pistolet de projection de façon à orienter les éléments magnétiques dès leur sortie du pistolet.The object of the invention is precisely to remedy this disadvantage. To this end, it offers a system projection of a coating in which the field magnetic is created around the nozzle of the projection gun to orient the elements magnetic as soon as they come out of the gun.

De façon plus précise, l'invention concerne un dispositif de projection d'un revêtement chargé d'éléments magnétiques, comprenant un pistolet de projection apte à projeter le revêtement sur une surface choisie. Ce dispositif de projection est caractérisé, par le fait qu'il comporte des moyens d'orientation des éléments magnétiques du revêtement, ces moyens d'orientation étant fixés autour du pistolet de projection et assurant l'orientation des éléments magnétiques dès leur sortie du pistolet de projection.More specifically, the invention relates to a device for spraying a loaded coating of magnetic elements, including a pistol projection suitable for projecting the coating onto a chosen surface. This projection device is characterized by the fact that it includes means orientation of the magnetic elements of the coating, these orientation means being fixed around the gun projection and ensuring the orientation of magnetic elements from out of the projection gun.

Avantageusement, les moyens d'orientation comprennent un anneau de ferrite entourant le pistolet de projection et autour duquel est enroulé un fil conducteur d'électricité connecté sur une source d'alimentation électrique pour créer à l'intérieur de l'anneau de ferrite un champ magnétique.Advantageously, the means of orientation include a ferrite ring surrounding the gun projection and around which is wrapped a electrical conductor connected to a source power supply to create inside of the ferrite ring a magnetic field.

Cet anneau de ferrite comporte un entrefer permettant, d'une part, le passage du revêtement lorsque celui-ci est projeté par le pistolet et, d'autre part, l'orientation des éléments magnétiques de ce revêtement projeté.This ferrite ring has an air gap allowing, on the one hand, the passage of the coating when it is projected by the pistol and, on the other hand, the orientation of the magnetic elements of this projected coating.

Selon l'invention, les moyens d'orientation comprennent un cylindre de blindage positionné entre le pistolet et l'anneau de ferrite pour protéger ledit pistolet du champ magnétique créé par l'anneau de ferrite, et empêcher que les éléments magnétisés n'obstruent le pistolet.According to the invention, the orientation means include a shield cylinder positioned between the gun and ferrite ring to protect said magnetic field gun created by the ring of ferrite, and prevent the magnetized elements obstruct the gun.

Ce cylindre de blindage comporte une ouverture de section sensiblement supérieure à la section de l'entrefer de l'anneau de ferrite.This shielding cylinder has an opening of section significantly greater than the section of the gap of the ferrite ring.

Selon un mode de réalisation de l'invention,, le dispositif de projection conforme à l'invention peut être embarqué sur un robot.According to one embodiment of the invention, the projection device according to the invention can be on a robot.

Brève description des dessinsBrief description of the drawings

La figure unique représente schématiquement le dispositif de l'invention comportant un pistolet de projection entouré des moyens pour orienter les éléments magnétiques du revêtement.The single figure schematically represents the device of the invention comprising a pistol projection surrounded by means to orient the magnetic elements of the coating.

Description détaillée de modes de réalisation de l'inventionDetailed description of embodiments of the invention

Sur la figure, on a représenté le dispositif de l'invention en perspective. Ce dispositif comporte un pistolet de projection référencé 1. Ce pistolet de projection est de type tout à fait classique. Il peut être, avantageusement, automatique. In the figure, there is shown the device the invention in perspective. This device includes a projection gun referenced 1. This spray gun projection is of a completely classic type. he can advantageously be automatic.

On peut utiliser, par exemple, les pistolets de projection automatique Kremlin® A1915N13 et A1918N13 destiné aux produits épais et fluides.One can use, for example, the pistols of automatic projection Kremlin® A1915N13 and A1918N13 intended for thick and fluid products.

Ce pistolet est raccordé à des alimentations en air comprimé et en revêtement, non représentées sur la figure par mesure de simplification.This gun is connected to power supplies compressed air and coating, not shown on the figure for simplification.

Cette figure montre, en outre, un anneau de ferrite 3 disposé autour de ce pistolet de projection 1. Cet anneau de ferrite 3 est lui-même entouré, au moins sur une partie, d'un fil conducteur d'électricité appelé fil de bobinage 5. Ce fil de bobinage 5, de préférence en cuivre, est enroulé en multicouches autour de l'anneau de ferrite 3 et connecté sur une alimentation 8 stabilisée en courant continu afin de créer dans l'anneau 3 un champ magnétique.This figure also shows a ring of ferrite 3 arranged around this spray gun 1. This ferrite ring 3 is itself surrounded, at the less on one part, of an electrical conductor called winding wire 5. This winding wire 5, of preferably copper, is wound in multi-layers around the ferrite ring 3 and connected on a power supply 8 stabilized in direct current in order to create a magnetic field in ring 3.

Selon l'invention, l'anneau de ferrite 3 comprend une ouverture réalisant un entrefer 7. Cette ouverture permet le passage du revêtement envoyé par le pistolet 1 vers la surface à recouvrir. Le champ magnétique régnant dans cet entrefer 7 permet alors d'orienter les éléments magnétiques contenus dans le revêtement lorsque ce dernier traverse l'entrefer 7 et jusqu'à ce qu'il s'applique sur la pièce à revêtir.According to the invention, the ferrite ring 3 comprises an opening making an air gap 7. This opening allows the passage of the coating sent by the gun 1 towards the surface to be covered. The magnetic field reigning in this air gap 7 then makes it possible to orient the magnetic elements contained in the coating when the latter crosses the air gap 7 and until that it applies to the part to be coated.

Selon un mode de réalisation de l'invention, l'anneau de ferrite 3 est réalisé à base de nickel et de zinc. Il a une largeur de 90 mm, un diamètre extérieur de 280 mm, un diamètre intérieur de 250 mm et, par conséquent, une épaisseur de 15 mm. En outre, l'entrefer 7 a une largeur d'environ 50 mm. Avec un tel anneau de ferrite 3 et pour une alimentation stabilisée fournissant au fil de bobinage une tension de 14 V et une intensité de 10 A, il règne au centre de l'entrefer 7 un champ magnétique d'environ 160 Gauss.According to one embodiment of the invention, the ferrite ring 3 is made from nickel and zinc. It has a width of 90 mm, a diameter 280 mm outside, an inside diameter of 250 mm and therefore a thickness of 15 mm. In addition, the air gap 7 has a width of about 50 mm. With such ferrite ring 3 and for a stabilized supply supplying the winding wire with a voltage of 14 V and an intensity of 10 A, it reigns in the center of the air gap 7 a magnetic field of about 160 Gauss.

Selon l'invention, un cylindre de blindage 2 est positionné entre le pistolet de projection 1 et l'anneau de ferrite 3. De façon plus précise, l'anneau de ferrite 3 est fixé, par sa face intérieure, sur le cylindre de blindage 2. Ce cylindre de blindage 2 est apte, en outre, à supporter le pistolet de projection 1 qui est fixé sur la face intérieure de ce cylindre.According to the invention, a shielding cylinder 2 is positioned between the spray gun 1 and the ferrite ring 3. More precisely, the ring of ferrite 3 is fixed, by its inner face, on the shield cylinder 2. This shield cylinder 2 is able, moreover, to support the spray gun 1 which is fixed on the inside of this cylinder.

Selon un mode de réalisation de l'invention, ce cylindre de blindage est réalisé en acier doux et a un diamètre extérieur de 210 mm et une longueur de 200 mm.According to one embodiment of the invention, this armor cylinder is made of mild steel and has a external diameter of 210 mm and a length of 200 mm.

Outre son rôle de support, le cylindre de blindage 2 permet d'éviter que des lignes de champs indésirables ne viennent perturber l'alimentation en peinture, résine ou barbotine du pistolet de projection.In addition to its supporting role, the shielding cylinder 2 prevents unwanted field lines do not disturb the supply of paint, resin or spray gun slip.

Selon l'invention, ce cylindre de blindage 2 comporte une ouverture 4 sensiblement alignée avec l'entrefer 7 pour permettre le passage du revêtement depuis le pistolet 1 jusqu'à la surface à recouvrir. On précise que le pistolet se déplace parallèlement par rapport à l'ouverture 4, c'est-à-dire dans le sens suggéré par la double flèche 9. Avantageusement, l'ouverture 4 du cylindre de blindage a une section sensiblement supérieure à celle de l'entrefer 7 de façon à ce que la totalité du revêtement émis par le pistolet 1 puisse être soumise au champ magnétique de l'entrefer 7.According to the invention, this shielding cylinder 2 has an opening 4 substantially aligned with the air gap 7 to allow the passage of the coating from gun 1 to the surface to be covered. We specifies that the pistol moves parallel by in relation to opening 4, i.e. in the direction suggested by the double arrow 9. Advantageously, the opening 4 of the shielding cylinder has a section significantly higher than that of the air gap 7 of so that the entire coating emitted by the gun 1 can be subjected to the magnetic field of air gap 7.

Le pistolet de projection 1 est donc centré à l'intérieur du cylindre de blindage 2 puis fixé sur ce cylindre de blindage de manière à être dans l'axe de l'anneau de ferrite 3. De cette façon, la buse du pistolet de projection débouche dans l'entrefer 7.The spray gun 1 is therefore centered at inside the shielding cylinder 2 then fixed on this shield cylinder so as to be in the axis of the ferrite ring 3. In this way, the nozzle of the projection gun opens into the air gap 7.

Pour réaliser le recouvrement d'une surface, l'alimentation en courant continu doit tout d'abord être mise en marche de façon à ce qu'un champ magnétique soit créé dans l'entrefer 7 de l'anneau de ferrite 3. La projection automatique du revêtement peut ensuite être effectuée. Les éléments magnétiques contenus dans le revêtement projeté par le pistolet de projection 1 se déposent sur la surface à recouvrir après avoir été orientés à partir du moment de leur passage dans l'entrefer 7, jusqu'au moment de l'application.To cover a surface, the DC power supply must first be switched on so that a field magnetic be created in the air gap 7 of the ring of ferrite 3. Automatic projection of the coating can then be performed. Magnetic elements contained in the coating projected by the spray gun projection 1 are deposited on the surface to be covered after being referred from the moment of their passage in the air gap 7, until the moment of the application.

Néanmoins, pour une efficacité optimale du champ magnétique, des distances de projection doivent être respectées. Par exemple, pour les modes de réalisation de l'anneau de ferrite 3 et du cylindre de blindage 2 donnés précédemment, la buse du pistolet de projection doit être distante de la surface à recouvrir d'environ 70 à 80 mm, ou encore 20 mm par rapport à la surface extérieure de l'anneau de ferrite 3.However, for optimal field efficiency magnetic, projection distances must be respected. For example, for the embodiments ferrite ring 3 and shield cylinder 2 given above, the nozzle of the projection gun must be about a distance from the surface to be covered 70 to 80 mm, or 20 mm from the surface outside of the ferrite ring 3.

Selon un mode de réalisation préféré de l'invention, le dispositif décrit précédemment est embarqué sur un robot. On a d'ailleurs représenté en traits mixtes sur la figure, une portion d'un bras de robot 6 fixé sur le cylindre de blindage 2.According to a preferred embodiment of the invention, the device described above is on board a robot. We have also represented in mixed lines in the figure, a portion of an arm of robot 6 fixed on the shielding cylinder 2.

Ce dispositif a donc pour avantage de permettre le recouvrement de tous types de surfaces et, notamment, de surfaces situées en milieu hostile puisqu'il peut être installé sur un bras de robot.This device therefore has the advantage of allowing the covering of all types of surfaces and, in particular, surfaces located in hostile environments since it can be installed on a robot arm.

Claims (6)

  1. Device for spraying a coating loaded with magnetic elements, comprising a spray gun (1) capable of spraying the coating onto a chosen surface,
    characterized in that it includes means (2, 3, 5) for orienting the magnetic elements of the coating, these orienting means being fixed around the spray gun and ensuring that the magnetic elements are oriented as soon as they leave the spray gun.
  2. Spray device according to Claim 1, characterized in that the orienting means comprise a ferrite ring (3) which surrounds the spray gun and around which is wound an electrically conducting wire (5) connected to an electrical power supply (8) in order to create a magnetic field inside the ferrite ring.
  3. Spray device according to Claim 2, characterized in that the ferrite ring has an air gap (7) allowing, on the one hand, passage for the coating when the latter is sprayed by the gun and allowing, on the other hand, the magnetic elements of this sprayed coating to be oriented.
  4. Spray device according to Claim 2 or 3, characterized in that the orienting means comprise a screening cylinder (2) which is positioned between the gun and the ferrite ring in order to protect the said gun from the magnetic field created by the ferrite ring.
  5. Spray device according to Claims 3 and 4, characterized in that the screening cylinder has an opening (4) with a substantially greater cross-section than the cross-section of the air gap of the ferrite ring.
  6. Spray device according to any one of Claims 1 to 5, characterized in that it is mounted on a robot (6).
EP95931244A 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating Expired - Lifetime EP0781170B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9411016A FR2724581B1 (en) 1994-09-15 1994-09-15 DEVICE FOR PROJECTING A COATING LOADED WITH MAGNETIC ELEMENTS
FR9411016 1994-09-15
PCT/FR1995/001180 WO1996008316A1 (en) 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating

Publications (2)

Publication Number Publication Date
EP0781170A1 EP0781170A1 (en) 1997-07-02
EP0781170B1 true EP0781170B1 (en) 1998-12-09

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EP95931244A Expired - Lifetime EP0781170B1 (en) 1994-09-15 1995-09-14 Device for projecting a magnetic element charged coating

Country Status (4)

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EP (1) EP0781170B1 (en)
DE (1) DE69506568T2 (en)
FR (1) FR2724581B1 (en)
WO (1) WO1996008316A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635830A1 (en) * 1996-09-04 1998-03-05 Weitmann & Konrad Fa Device and method for dusting web or sheet products

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2846623A1 (en) * 1978-10-26 1980-05-08 Basf Ag METHOD FOR THE PRODUCTION OF LAYER MAGNETOGRAM CARRIERS
JPS61122928A (en) * 1984-11-16 1986-06-10 Fujitsu Ltd Production of magnetic disk medium

Also Published As

Publication number Publication date
DE69506568T2 (en) 1999-06-24
EP0781170A1 (en) 1997-07-02
WO1996008316A1 (en) 1996-03-21
FR2724581A1 (en) 1996-03-22
FR2724581B1 (en) 1996-12-06
DE69506568D1 (en) 1999-01-21

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