EP0392533B1 - Dispositif allumeur décomposant - Google Patents

Dispositif allumeur décomposant Download PDF

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Publication number
EP0392533B1
EP0392533B1 EP90107028A EP90107028A EP0392533B1 EP 0392533 B1 EP0392533 B1 EP 0392533B1 EP 90107028 A EP90107028 A EP 90107028A EP 90107028 A EP90107028 A EP 90107028A EP 0392533 B1 EP0392533 B1 EP 0392533B1
Authority
EP
European Patent Office
Prior art keywords
igniter
disintegrating
charge
ignition
igniter device
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
EP90107028A
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German (de)
English (en)
Other versions
EP0392533A2 (fr
EP0392533A3 (fr
Inventor
Guido Stang
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.)
Buck Chemisch Technische Werke GmbH and Co
Buck Werke GmbH and Co
Original Assignee
Buck Chemisch Technische Werke GmbH and Co
Buck Werke GmbH and Co
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 Buck Chemisch Technische Werke GmbH and Co, Buck Werke GmbH and Co filed Critical Buck Chemisch Technische Werke GmbH and Co
Publication of EP0392533A2 publication Critical patent/EP0392533A2/fr
Publication of EP0392533A3 publication Critical patent/EP0392533A3/fr
Application granted granted Critical
Publication of EP0392533B1 publication Critical patent/EP0392533B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0826—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators

Definitions

  • the invention relates to an ignition disassembly device for projectiles, grenades, cartridges, projectiles and the like, consisting of a thin-walled aluminum sleeve, an ignition disassembly charge arranged therein, optionally an ignition aid arranged in this charge, and a flange piece arranged at the head end of the aluminum sleeve and having an axial bore.
  • Such an ignition disassembly device is usually arranged axially in projectiles, grenades, cartridges, throwing objects and the like and normally penetrates them more or less overall in the area which contains the active charges of such devices, so that the igniter disassembly device is generally completely embedded in the respective active charge .
  • the active charge is normally an ignitable and combustible charge, such as an ignitable and combustible throwing means of known type, which, after more or less complete reaction of the igniter charge contained in the igniter device, which is initiated via an ignition delay piece arranged in the axial bore of the flange piece, and tearing open Aluminum sleeve ensures a spontaneous and comprehensive ignition of the active charge and subsequent disassembly of the container containing this charge.
  • the active charge can consist, for example, of conventional sentences based on red phosphorus or also of flammable thin leaflets which are ignited by the igniter charge of the igniter device and are distributed in the desired manner in the environment after the wall of the respective container has been disassembled.
  • a throwing body for the representation of an infrared surface radiator is known, the flammable thin flakes present as throwing material are ignited with a burning layer consisting of a fire paste via an igniter device of the above type and after disassembling the throwing agent container to the desired infrared surface radiator
  • This ignition disassembly device accordingly also consists of a thin-walled aluminum sleeve, at the head end of which an axial bore for receiving an ignition delay piece has a flange piece, the ignition disassembly charge located in the sleeve being axially penetrated by an ignition liner as an ignition aid.
  • a corresponding throwing body is also known from DE-B 28 11 016, but its igniter device does not contain an igniter core.
  • the known ignition disassembly devices fulfill their purpose in principle, but have the disadvantage of insufficient mechanical strength.
  • firing with a high launch acceleration as can be the case especially with projectiles and grenades, where accelerations of 15,000 to 20,000 g and above are to be expected, there is therefore a strong deformation and premature tearing of the thin-walled Aluminum sleeve, which brings various undesirable and even very disruptive consequences.
  • the deformation-related occasional tearing of the aluminum sleeve leads, for example, to a trickle of the igniter charge.
  • the active charge surrounding the ignition disassembly device is sensitive to friction and / or impact, such as, for example, in the case of a payload containing red phosphorus, then the friction on the aluminum sleeve can cause the active charge to ignite prematurely and thus also ignite the sprinkled ignition disassembly charge come.
  • the consequence of this is a premature detonation of the igniter charge and thus also a disassembly of the payload and the body housing the payload. All of this can also be initiated by the influence of the impact on the possible ignition aid, in particular an ignition liner, which in turn ultimately leads to undesired premature or at least irregular disassembly.
  • a strong deformation or even tearing of the aluminum sleeve naturally has the overall disadvantage of weakening this sleeve at certain points, with the result that the aluminum sleeve is not disassembled evenly, practically at the same time and over its entire circumference, when the igniter charge reacts through.
  • an ignition disassembly device with comparatively low mechanical strength is indispensable, since, for example, if the aluminum sleeve containing the ignition disassembly charge is too high, the payload would be distributed into particles that are too small or else the payload would be damaged in some other way.
  • the invention has for its object to provide a lighter breakdown device that remains fully functional even at high shot loads, such as occur at accelerations of 15,000 to 20,000 g or even higher, so that its functional image corresponds to a lighter breakdown device with an essentially intact aluminum sleeve .
  • the plastic jacket on the aluminum sleeve is preferably made of a shrink tube, which advantageously also has an inner adhesive coating.
  • a shrink tube expediently has a shrinking temperature of 100 to 200 ° C., preferably 125 to 175 ° C. It can therefore be easily attached as a piece of tubing with the required length to the aluminum sleeve of the fully ignited ignition disassembly device and then fixed to it by heating to the respective shrinking temperature, for example to 125 ° C., the inner adhesive coating preferably present on the shrinking tube for a further improvement of such a composite of the aluminum sleeve and the plastic jacket produced thereon by shrinking the shrink tube.
  • Shrink sleeves are products familiar to the person skilled in the art, which are based on a wide variety of cold-stretched thermoplastic materials, which return to their original stress-free arrangement when heat-treated. This is a consequence of the so-called memory or elastic shape memory of the plastic molecules from which such shrink sleeves are made.
  • shrink tubes as well as other plastic compositions, which can also be used to produce a thin-walled plastic jacket on the aluminum sleeve of the present igniter device, can optionally contain conventional additives, such as fillers, extenders and in particular reinforcing agents of various types, or else Pigments.
  • Shrink sleeves are already used in electrical engineering, for example, in order to isolate and protect cable bundles.
  • Shrink sleeves based on polyethylene are available, for example, from T & B, Thomas & Betts GmbH, D-6073 Egelsbach, under the various type designations PLG (Shrink-Kon).
  • the thin-walled plastic jacket present as an essential element in the ignition disassembly device according to the invention as a coating on its aluminum sleeve can either be produced from a shrink tube in the preferred manner or it can, if under some circumstances, also be made from liquid preparations of the respective plastics, for example by immersion, Brushing, spraying or rolling on and then curing the applied liquid plastic preparation in the usual way.
  • the liquid plastic preparations to be used here may also contain conventional fillers, extenders and reinforcing agents or other auxiliaries, including crosslinking agents and polymerization catalysts.
  • the formation of thin-walled plastic shells on the respective aluminum sleeves based on liquid plastic compositions is therefore within the scope of the usual professional skill.
  • the thin-walled plastic jacket present on the aluminum sleeve of the ignition disassembly device according to the invention is preferably based on any thermoplastic material, polyolefins or copolymers thereof being preferred.
  • suitable plastics are polyethylene, which is particularly preferred, polypropylene, polyisobutylene, polybutene or Copolymers thereof or also polyethylene terephthalate or polyvinyl chloride.
  • any other plastics such as silicones, can also be used, which ensure that the aluminum sleeve is equipped in such a way that the functional appearance of the ignition disassembly device according to the invention is almost unchanged when disassembled by the respective thin-walled plastic jacket.
  • the decomposition temperature of such a plastic jacket must of course be far below the temperature that occurs during the function of the igniter charge and the disassembly of the aluminum sleeve, which means that the thermal and mechanical effects on the payload by the igniter device must not be changed significantly by the thin-walled plastic jacket .
  • the plastic sheath should result in such an improvement in the strength of the aluminum sleeve that this sleeve preferably no longer tears open or that any weak points or cracks do not allow the igniter charge to trickle into the surrounding payload.
  • the plastic jacket present on the aluminum sleeve as a coating should therefore in any case also prevent contact between the igniter charge located in the igniter device and the surrounding payload if the aluminum sleeve should become defective at all.
  • the plastic sheath which is much softer than the aluminum of the aluminum sleeve, is also said to significantly reduce the risk of ignition of the payload due to friction or impact, such as occurs with relatively high launch loads and can then lead to premature ignition and reaction.
  • the plastic jacket is also intended to protect the aluminum sleeve against corrosion by the action of the components of the payload.
  • the thin-walled plastic jacket present on the aluminum sleeve of the ignition disassembly device according to the invention suitably has a tensile strength of 700 to 1,300 N / cm2, and preferably 1,000 to 1,100 N / cm2, and suitably has an elongation at break of 200 to 400%, preferably of 250 to 350%. It generally has a wall thickness of 0.2 to 1.5 mm, preferably 0.3 to 0.8 mm. Furthermore, this plastic jacket should not melt, be well resistant to the chemicals of the respective payload and have a temperature resistance of generally from -40 ° C to +120 ° C, preferably from -30 ° C to +70 ° C.
  • the wall thickness of the aluminum sleeve of the ignition disassembly device according to the invention is of course dependent on the particular device in which it is used, but is generally 0.1 to 1.5 mm, and preferably 0.2 to 0.8 mm.
  • Such aluminum sleeves are usually produced by conventional extrusion from an aluminum molded body.
  • the ignition disintegration charge present in the aluminum sleeve can be based on any powder set that is customary for this purpose and is preferably based on a powder set consisting of magnesium and barium nitrate, in which these two components are present in particular in a weight ratio of approximately 30:70%, this set also expediently also approximately 1 % Contains aluminum oxide. It is therefore a relatively insensitive powder batch.
  • the essential element of the ignition disassembly device according to the invention is the coating made of a thin-walled plastic jacket arranged on the aluminum sleeve.
  • an ignition aid is also arranged in the igniter charge of the igniter device according to the invention, which improves the reaction pattern of the igniter charge in the desired manner.
  • the ignition aid must of course be much more sensitive than the igniter charge, since the igniter should ensure that the igniter charge is ignited and reacted as quickly as possible. Nitrocellulose powder is preferably used for this.
  • the ignition disassembly device has a practically optimal spectrum of action especially when its aluminum sleeve is not only covered with a thin-walled plastic jacket, but when an ignition aid is also arranged in its ignition disassembly charge, which can be designed in different ways.
  • ignition particles are arranged in a statistically distributed manner in the igniter charge, preferably based on nitrocellulose powder.
  • These ignition particles are preferably granules or cut extrudates based on the respective ignition charge, which have a grain size of approximately 0.5 to 2.5 mm, preferably approximately 1 to 2 mm.
  • Such ignition particles which are statistically distributed in the igniter charge, ensure a rapid and reliable through-reaction of the igniter charge and, particularly in comparison to a likewise possible ignition core based on the respective ignition charge, which penetrates the igniter charge axially, have the further advantage that the embedding of the highly inflammable particles in the ignition disassembly kit makes this less sensitive to impact compared to a kit with a continuous ignition core. The risk of inflammation caused by the launch shock, which is relatively low anyway, is thereby further reduced.
  • the combined The use of a plastic jacket and of ignition particles, which are statistically distributed in the ignition disassembly charge, thus represents a particularly preferred embodiment of the ignition disassembly device according to the invention.
  • the firing aid can also consist of a firing core which axially penetrates the firing splitter charge, as is already provided, for example, in the firing splitter device of the throwing body described in DE-B 35 15 166.
  • the amount of igniter based on the amount by weight of the igniter charge, is generally 2 to 7 percent by weight and preferably 3 to 5 percent by weight.
  • the advantages that can be achieved with the invention are, in particular, that the strength and resilience of the aluminum sleeve of the present ignition disassembly device can be increased in a metered manner by the thin-walled plastic jacket present on the aluminum sleeve, without this resulting in a substantial increase in the insulation of this sleeve with the result of a uncontrolled and violent disassembly of the sleeve and thus the throwing body provided with such an igniter device.
  • the possible, in principle, pure increase in the wall thickness of the aluminum sleeve would therefore not lead to the desired goal.
  • the invention can be used with all projectiles, grenades, cartridges, projectiles and the like, and the igniter decomposition device according to the invention can therefore, for example, only be based on an incandescent charge, an igniter charge or a decomposer charge, with devices in which this igniter decomposition device is used can be, for example 60 mm mortar grenades, 81 mm mortar grandsons, 120 mm mortar cartridges, 105 mm bullets, 155 mm bullets or corresponding small devices, such as hand flame cartridges and in particular projectiles.
  • the use of the device according to the invention therefore arises automatically for the person skilled in the art.
  • FIG. 1 shows an ignition disassembling device 1 (for a projectile) made of a thin-walled aluminum sleeve 3, which is a sleeve produced by extrusion with a wall thickness of approximately 0.35 mm, a base thickness of approximately 1.5 mm and an outer diameter of approximately 12 mm and a length of about 180 mm, and of a flange piece 7 arranged at the head end of the aluminum sleeve 3, which is also made of aluminum and which has an annular groove 15 on its neck piece, via which it is connected to the aluminum sleeve 3 by a crank.
  • the flange piece 7 has a threaded axial bore 17 into which an ignition delay piece, not shown, can be screwed.
  • An existing external thread 19 on the neck piece of the flange piece 7 is used for fixing in the bottom part of a projectile, also not shown.
  • the aluminum sleeve 3 of the ignition disassembly device 1 is covered with a thin-walled plastic jacket 9, which has a wall thickness of approximately 0.35 mm and is made from a shrink tube with an inner adhesive coating.
  • the shrink tube used for this is a plastic tube made by extrusion and cross-linked and modified by radiation and modified on the basis of polyethylene, the shrinking temperature of which starts at approximately 125 ° C. and which has a tensile strength of at least 1,000 N / cm2 and an elongation at break of at least 250%. This shrink tube can be used in a temperature range from -55 ° C to +115 ° C and does not melt.
  • Shrink tubes of this type are available, for example, from T & B, Thomas & Betts GmbH, D-6073 Egelsbach, under the type designations PLG (Shrink-Kon), a shrink tube with the product number PLG 500-XY being used in the present case is.
  • the interior of the aluminum sleeve 3 is filled with an ignition decomposition charge 5, which is a common and relatively insensitive powder set based on magnesium and barium nitrate in a mixing ratio of 30:70 parts by weight, which still contains about 1 percent by weight of aluminum oxide.
  • ignition particles 11 based on nitrocellulose powder, which consist of a cut extrudate of the mass of the ignition aid are arranged in statistical distribution as ignition aid.
  • the ignition particles 11 can of course also be produced in any other suitable manner and, for example, also represent a more or less coarse-grained granulate.
  • the igniter charge 5 is about 18 g, while the amount of igniter particles 11 is about 0.6 g and thus makes up about 3.3% by weight of the igniter charge 5.
  • FIG. 2 shows an ignition disassembly device 1 (for a throwing body), which differs from the ignition disassembly device shown in FIG. 1 only in that, instead of the ignition particles 11 as ignition aid, an ignition core 13 which penetrates the ignition disassembly charge 5 axially, again on the basis of nitrocellulose powder, is present .
  • This kindling consists of an extrudate of the mass of the kindling aid which, in contrast to the kindling particles 11 in FIG. 1, is therefore not cut. Instead, the igniter core 13 can of course also be produced in any other suitable manner.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
  • Road Signs Or Road Markings (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Braking Arrangements (AREA)
  • Laminated Bodies (AREA)

Claims (16)

  1. Dispositif d'allumage et de désintégration (1) pour des balles de fusil, des obus, des cartouches, des projectiles et semblables, constitué d'une douille en aluminium (3) à paroi mince, d'une charge d'allumage et de désintégration (5) disposée dans celle-ci, d'une aide à l'allumage (11, 13) disposée dans cette charge (5) et d'un morceau de bride (7) disposé au bout de la douille en aluminium (3) et présentant un trou percé axial (17), caractérisé en ce que la douille en aluminium (3) est recouverte d'une enveloppe en matière plastique (9) à paroi mince.
  2. Dispositif d'allumage et de désintégration selon la revendication 1, caractérisé en ce que l'enveloppe en matière plastique (9) est préparée à partir d'une gaine thermorétractable.
  3. Dispositif d'allumage et de désintégration selon la revendication 2, caractérisé en ce que la gaine thermorétractable présente une couche interne de colle.
  4. Dispositif d'allumage et de désintégration selon la revendication 2 ou 3, caractérisé en ce que la gaine thermorétractable utilisée présente une température de rétrécissement de 100 à 200°C, de préférence de 125 à 175°C.
  5. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que l'enveloppe en matière plastique (9) est constituée d'une matière plastique thermoplastique.
  6. Dispositif d'allumage et de désintégration selon la revendication 5, caractérisé en ce que l'enveloppe en matière plastique (9) est constituée d'une polyoléfine ou d'un copolymère de celle-ci.
  7. Dispositif d'allumage et de désintégration selon la revendication 5, caractérisé en ce que l'enveloppe en matière plastique (9) est constituée de polyéthylène, de polypropylène, de polyisobutylène, de polybutène ou d'un copolymère de ceux-ci.
  8. Dispositif d'allumage et de désintégration selon la revendication 5, caractérisé en ce que l'enveloppe en matière plastique (9) est constituée de poly(éthylène téréphtalate) ou de poly(chlorure de vinyle).
  9. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que l'enveloppe en matière plastique (9) présente une résistance à la rupture par traction de 700 à 1 300 N/cm² et un allongement à la rupture de 200 à 400 %.
  10. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que l'enveloppe en matière plastique (9) présente une épaisseur de paroi de 0,2 à 1,5 mm, de préférence de 0,3 à 0,8 mm.
  11. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que la douille en aluminium (3) présente une épaisseur de paroi de 0,1 à 1,5 mm, de préférence de 0,2 à 0,8 mm.
  12. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que la charge d'allumage et de désintégration (5) est à base d'une composition de poudre à base de magnésium et de nitrate de baryum.
  13. Dispositif d'allumage et de désintégration selon l'une quelconque des revendications précédentes, caractérisé en ce que l'aide à l'allumage (11, 13) est à base d'une composition à base de poudre de nitrocellulose.
  14. Dispositif d'allumage et de désintégration selon la revendication 13, caractérisé en ce que l'aide à l'allumage (11) est constituée de particules d'allumage (11) à base de poudre de nitrocellulose réparties de manière aléatoire dans la charge d'allumage et de désintégration (5).
  15. Dispositif d'allumage et de désintégration selon la revendication 13, caractérisé en ce que l'aide à l'allumage (13) est constituée d'une âme d'allumage (13) à base de poudre de nitrocellulose traversant axialement la charge d'allumage et de désintégration (5).
  16. Dispositif d'allumage et de désintégration selon la revendication 13, 14 ou 15, caractérisé en ce que la quantité de l'aide à l'allumage (11, 13) est de 2 à 7 % en poids, rapportés à la masse de la charge d'allumage et de désintégration (5).
EP90107028A 1989-04-13 1990-04-12 Dispositif allumeur décomposant Expired - Lifetime EP0392533B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3912183 1989-04-13
DE3912183A DE3912183A1 (de) 1989-04-13 1989-04-13 Anzuendzerlegervorrichtung

Publications (3)

Publication Number Publication Date
EP0392533A2 EP0392533A2 (fr) 1990-10-17
EP0392533A3 EP0392533A3 (fr) 1992-03-04
EP0392533B1 true EP0392533B1 (fr) 1995-08-23

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ID=6378631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107028A Expired - Lifetime EP0392533B1 (fr) 1989-04-13 1990-04-12 Dispositif allumeur décomposant

Country Status (5)

Country Link
US (1) US5345871A (fr)
EP (1) EP0392533B1 (fr)
AT (1) ATE126882T1 (fr)
CA (1) CA2014553C (fr)
DE (2) DE3912183A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5895881A (en) * 1996-08-02 1999-04-20 Rheinmetall Industrie Ag Propellant charge igniter

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DE3912183A1 (de) * 1989-04-13 1990-10-18 Buck Chem Tech Werke Anzuendzerlegervorrichtung
DE29517208U1 (de) * 1995-10-31 1997-02-27 Diehl GmbH & Co, 90478 Nürnberg Hülse für pyrotechnische Ladungen
DE19548436C1 (de) * 1995-12-22 1997-06-26 Buck Chem Tech Werke Schnellnebelhandgranate
DE19818337C1 (de) * 1998-04-23 1999-11-18 Buck Werke Gmbh & Co Kg Pyrotechnische Wirkmasse mit Anzünd- und Abbrandbeschleuniger
FR2802297B1 (fr) * 1999-12-08 2002-10-11 Giat Ind Sa Tube allumeur pour munition d'artillerie
DE102007037699B4 (de) * 2007-08-09 2014-10-30 Rheinmetall Waffe Munition Gmbh Verfahren zur Verbindung des an einem Geschoss angeordneten Hülsendeckels an dem Hülsenmantel einer Patrone

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DE3515166A1 (de) * 1985-04-26 1986-10-30 Buck Chemisch-Technische Werke GmbH & Co, 7347 Bad Überkingen Wurfkoerper zur darstellung eines infrarot-flaechenstrahlers
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DE3912183A1 (de) * 1989-04-13 1990-10-18 Buck Chem Tech Werke Anzuendzerlegervorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5895881A (en) * 1996-08-02 1999-04-20 Rheinmetall Industrie Ag Propellant charge igniter
EP1067358A2 (fr) 1996-08-02 2001-01-10 Rheinmetall W & M GmbH Allumeur pour charge propulsive

Also Published As

Publication number Publication date
CA2014553C (fr) 1995-06-20
CA2014553A1 (fr) 1990-10-13
DE3912183C2 (fr) 1991-02-28
DE59009544D1 (de) 1995-09-28
DE3912183A1 (de) 1990-10-18
ATE126882T1 (de) 1995-09-15
US5345871A (en) 1994-09-13
EP0392533A2 (fr) 1990-10-17
EP0392533A3 (fr) 1992-03-04

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