EP0416252B1 - Appareil pour enlever le revêtement de plaques formant double plancher ou de pièces similaires - Google Patents

Appareil pour enlever le revêtement de plaques formant double plancher ou de pièces similaires Download PDF

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Publication number
EP0416252B1
EP0416252B1 EP19900113628 EP90113628A EP0416252B1 EP 0416252 B1 EP0416252 B1 EP 0416252B1 EP 19900113628 EP19900113628 EP 19900113628 EP 90113628 A EP90113628 A EP 90113628A EP 0416252 B1 EP0416252 B1 EP 0416252B1
Authority
EP
European Patent Office
Prior art keywords
stripping
carriage
holding plate
threaded spindle
frame member
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
EP19900113628
Other languages
German (de)
English (en)
Other versions
EP0416252A1 (fr
Inventor
Günther Brückner
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.)
Mero Werke Dr Ing Max Mengeringhausen GmbH and Co
Original Assignee
Mero Werke Dr Ing Max Mengeringhausen 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 Mero Werke Dr Ing Max Mengeringhausen GmbH and Co filed Critical Mero Werke Dr Ing Max Mengeringhausen GmbH and Co
Publication of EP0416252A1 publication Critical patent/EP0416252A1/fr
Application granted granted Critical
Publication of EP0416252B1 publication Critical patent/EP0416252B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10S156/918—Delaminating processes adapted for specified product, e.g. delaminating medical specimen slide
    • Y10S156/929—Delaminating component from building, e.g. wall paper, shingle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10S156/934—Apparatus having delaminating means adapted for delaminating a specified article
    • Y10S156/935—Delaminating means in preparation for post consumer recycling
    • Y10S156/94—Means adapted for delaminating component from building, e.g. wall paper, shingle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1059—Splitting sheet lamina in plane intermediate of faces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
    • Y10T156/1168—Gripping and pulling work apart during delaminating
    • Y10T156/1179—Gripping and pulling work apart during delaminating with poking during delaminating [e.g., jabbing, etc.]
    • Y10T156/1184—Piercing layer during delaminating [e.g., cutting, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/19—Delaminating means
    • Y10T156/1961—Severing delaminating means [e.g., chisel, etc.]
    • Y10T156/1967—Cutting delaminating means
    • Y10T156/1972—Shearing delaminating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/02—Other than completely through work thickness
    • Y10T83/0267—Splitting
    • Y10T83/0296—With infeeding of work

Definitions

  • the invention relates to a device for automatically separating coverings on raised floor panels or the like, which has a separating device.
  • the invention has for its object to a powerful device for automatically separating the coverings from raised floors or the like create, which avoids any risk of damage to the supporting plate part during the separation process.
  • a device for automatically separating coverings from raised floor panels or the like which has a separating device which contains a motor-driven cutting knife and is pivotally or adjustably attached to a receiving plate about a horizontal axis and which is fastened in a horizontal or roughly horizontal plane on a transversely arranged frame part of the device is mounted such that it can move to a limited extent in the direction of the longitudinal axis of the device, a slide with brackets for a raised floor plate being arranged below the separating device and parallel to the separating knife of the separating device or in parallel can be moved back and forth by motor to the longitudinal axis of the device.
  • Embodiments of the invention emerge from the subclaims. It is expedient if a support and guide bar for the cutting knife is provided on the slide, which holds or guides the cutting knife to the level required for separating a cover at the beginning of a feed movement of the slide.
  • This support and guide bar for the cutting knife represents an additional security feature of the device according to the invention, which ensures that the point of attack of the cutting knife at the start of a separation process is at the correct level, i.e. between the underside of the covering and the top of the load-bearing plate part of a raised floor plate.
  • the mounting plate is arranged on the transverse frame part of the device in an adjustable manner.
  • the working height of the separating device can be changed in a simple manner, in order to adapt to different types of raised floor panels constant fixed working angle of the cutting knife.
  • the sub-claims 4, 5 and 6 are directed to a structurally particularly simple, reliable storage of the separation device on the frame of the device.
  • a plurality of cut-off devices are mounted laterally next to one another via their own mounting plates on the transversely arranged frame part, cut-off knives with a correspondingly small working width can advantageously be used, which in turn manage with correspondingly weaker engine outputs.
  • the storage of such separation devices on the transverse frame part of the device is also correspondingly easier.
  • three separation devices are provided, of which the middle one is offset in relation to the two outer separation devices in the axial direction of the device, e.g. is arranged in a projecting manner.
  • This version is particularly suitable for processing raised floor panels with a floor plan of 600 x 600 mm, whereby the working width of the separating knives is slightly more than 200 mm.
  • the fact that the middle of the three separating devices is offset from the other two in the axial direction of the device reliably prevents a lateral collision of the separating knives which oscillate during operation.
  • a preferred, weight-saving design of the slide receiving the raised floor plate is achieved if it consists essentially of a frame-shaped part, at the corners of which the holders for the Raised floor plate are arranged, wherein the carriage is expediently mounted on two guide rods on the frame of the device.
  • a structurally simple and nevertheless robust drive of the slide is achieved in that a running nut seated on a threaded spindle is attached to it, and the threaded spindle on the frame of the device is rotatable, but axially fixed and alternately motor-driven in both directions of rotation.
  • a slip clutch is preferably installed in the drive train between the drive motor and the threaded spindle.
  • the threaded spindle is expediently encased by a conical spring for protection against contamination.
  • the device according to the invention is suitable for automatically separating most of the usual coverings from raised floor panels, in particular from carpets and PVC coverings or the like.
  • the reference number 10 in Fig. 1 denotes a raised floor panel, the cover 12, z. B. a carpet from the supporting plate part 11 to be removed or separated.
  • Such raised floor panels 10 are known to be supported on footrests at a distance from an unfinished floor, so that a space for accommodating various installation lines is present between the raised raised floor panels and the unfinished floor.
  • the removal of the coverings 12 from the load-bearing plate parts 11 may be necessary for various reasons, but as a rule wear of the coverings 12 is decisive for this.
  • the separation or peeling of the cover 12 from the load-bearing plate part 11 takes place completely automatically by means of a device 13. It should be emphasized at this point that the device 13 is also suitable for separating coverings from other relatively small-sized floor plates, for. B. of plates so-called assembly floors.
  • the device 13 has a supporting frame 14 numerous, interconnected square tubes.
  • a frame part 15, which runs transversely to the longitudinal axis of the device 13, is supported on the frame 14 via two standing side parts 16. With its two side parts 16, the frame part 15 forms a portal-like supporting structure for, for example, three similar separating devices 17, each of which has an oscillating separating knife 18 driven by an electric motor.
  • the suspension or storage of each of the three separation devices 17 on the frame part 15 is of the same type and therefore only one is described in detail below.
  • the middle of the three separating devices 17 is offset or arranged in a projecting manner in relation to the two outer separating devices 17 in the direction of the longitudinal axis of the device 13 in order to prevent the cutting blades 18 of the three separating devices 17, which oscillate during operation, from colliding avoid.
  • the working paths of the separating knives 18 can overlap somewhat laterally due to the above arrangement.
  • the raised floor plate 10 shown in FIGS. 1 and 2 has, for. B. a floor plan of 600 x 600 mm and the working width of the cutting knife 18 is 210 mm.
  • the cover 12 can therefore be separated or peeled off from the three separating devices 17 in one operation from the supporting plate part 11 of the raised floor plate 10 when the device 13 is in operation, which will be explained in detail.
  • Each separating device 17 is pivotably or adjustably mounted about a horizontal axis 19 in a U-shaped holder 20 in order to be able to adjust the working angle of the separating knife 18 in accordance with the respective requirements which are predetermined by the type of cover layer 12 and the supporting plate part 11 .
  • each separating device 17 In its In the setting position, each separating device 17 is fixed to the U-shaped holder 20 by screws, not shown.
  • the holder 20 is rigidly attached to a mounting plate 21, for. B. screwed.
  • the rectangular receiving plate 21 is supported by four eyebolts 22, which are hinged to the four corners of the receiving plate 21 by means of bolts 23.
  • the eyebolts 22 extend with lateral play through bores 24 in the frame part 15 and are supported by nuts 25 on the upper side of the frame part 15. Corresponding nut locks are designated by 26.
  • a compression spring 27 is clamped between the center of each mounting plate 21 and the frame part 15.
  • Four screws 28 arranged symmetrically on the frame part 15 engage on the upper side of the receiving plate 21. The lower ends of these screws 28 secured in their setting positions form abutments for the receiving plate 21 when the nuts 25 are tightened.
  • the mounting plate 21 can be mounted in a horizontal or roughly horizontal, cushioned manner, to a limited extent, parallel to the longitudinal axis of the device 13, which is necessary in order to transmit vibrations generated by the separating devices 17 to the frame 14 to keep it at an acceptable level.
  • the mounting plates 21 of the three separating devices 17 are mounted on the frame part 15 so that they can be adjusted in height, so that the device 13 can be adapted to raised floor plates 10 of different heights.
  • a carriage 29 is mounted on the frame 14 so as to be able to be moved back and forth by a motor transversely to the separating knives 18 or parallel to the longitudinal axis of the device 13.
  • the carriage 29 has a frame-shaped part 30, at the four corners of which angular brackets 31 for the raised floor plate 10 are attached.
  • the double base plate 10 rests with its corner regions on the heads of screws 32 which can be locked by lock nuts on the brackets 31, which serve for height adjustment of the double base plate 10.
  • opposite brackets 31 extends a support and guide bar 33 for the three separating knives 18.
  • the support and guide bar 33 can also be attached directly to the frame-shaped part 30 via supports.
  • This support and guide bar 33 ensures at the beginning of a feed movement of the slide 29 (according to FIGS. 1 and 2 in the direction of the arrow to the left) that the separating knives 18 are at the level required for separating the cover layer 12 and at the same time reliably prevents damage of the edge or edge area of the supporting plate part 11 by the separating knife 18 while they are performing their oscillating movements.
  • the frame-shaped part 30 of the slide 29 is mounted on two guide rods 35 by means of four bearings 34.
  • the guide rods 35 extend parallel to the longitudinal axis of the device 13 and are fixed at their ends in rails 36, which in turn are attached to the frame 14, e.g. are screwed on.
  • a running nut 38 is connected to the frame-shaped part 30 of the slide 29 via a driver 37, which nut sits on a threaded spindle 39.
  • the threaded spindle 39 is supported at its ends in roller bearings 40 which are fastened to one rail 36 or to part 41 of the frame 14.
  • the threaded spindle 39 is thus rotatable on the frame 14, but axially fixed.
  • Your drive to generate a feed movement of the carriage 29 is carried out by a variable-speed gear motor 42 fastened to the frame 14, the driving pinion 43 of which is connected, for example, via a drive chain 44 to a toothed wheel 45, which forms part of a slip clutch 46 which is connected to the threaded spindle 39 in terms of drive.
  • the slip clutch 46 forms a securing element in the event that there is a malfunction when the cover 12 is separated from the load-bearing plate part 11.
  • the threaded spindle 39 is rotated via the pinion 43, the drive chain 44, the toothed wheel 45 and the slip clutch 46 in such a way that the running nut 38 and thus the slide 29 with the inserted double floor plate 10 according to FIG. 1 and 2 move to the left.
  • the feed speed of the carriage 29 is selected so that the three cutting knives 18 of the cutting devices 17, which are now also switched on, cut off or peel off the covering 12 from the supporting plate part 11 in one operation.
  • the beginning of this separation process is indicated in Fig. 1.
  • the cover layer 12 is completely removed from the plate part 11 and can then be removed from the device by hand or also by ejector devices (not shown).
  • the variable-speed gear motor 42 is switched off, for example via limit switches (not shown), and a further drive motor 47 is switched on, which causes the carriage 29 with the plate part 11 to be returned to the starting position shown on the right in FIG. 1.
  • This return of the carriage 29 with the plate part 11 into the starting position is preferably carried out with a much higher speed than the feed of the slide 29.
  • the drive motor 47 is connected with its drive pinion 48 via a drive chain 49 to a gear 50 of a slip clutch 51.
  • the slip clutch 51 sits on the threaded spindle 39 and also serves as a securing element, which comes into operation in the event of a malfunction.
  • the drive motor 47 When the drive motor 47 has moved the slide 29 back into the starting position shown in FIG. 1 by corresponding rotation of the threaded spindle 39, the drive motor 47 is driven e.g. B. switched off again by a limit switch, not shown, and the supporting plate part 11 can now be lifted out of the brackets 31 of the carriage 29 and removed from the device 13. The device 13 is now ready for a new operation.
  • the reference numbers 52 and 53 indicate two cover hoods for the device 13 in dash-dotted lines, which can simply be folded down to open the device 13.
  • the threaded spindle 39 can be encased by a conical spring clamped between the driver 37 and the slip clutch 51, which protects the threaded spindle 39 against contamination.
  • One of the two drive motors 42, 47 provided in the exemplary embodiment for the threaded spindle 39 can be dispensed with if one is provided which can be activated alternately in two directions of rotation.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Floor Finish (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Coating Apparatus (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (12)

  1. Appareil destiné à détacher les revêtements de dalles de sol doubles ou similaires, comportant une lame de coupe motorisée, caractérisé en ce que
    a) l'appareil de coupe (17) fait partie d'un dispositif de séparation automatique par coupe des revêtements (12) et est fixé pivotant et réglable autour d'un axe horizontal (19), sur une plaque de logement (21) qui est montée déplaçable dans un plan horizontal ou à peu près horizontal, sur une partie de cadre (15) transversale du dispositif (13), de manière à former ressort dans une mesure limitée en direction de l'axe longitudinal du dispositif (13) et
    b) au-dessous de l'appareil de coupe (17), il est prévu un chariot (29) avec des fixations (31) pour une dalle de sol double (10) qui peut être déplacée par un moteur dans un mouvement de va-et-vient, transversalement à la lame de coupe (18) de l'appareil de coupe (17) ou parallèlement à l'axe longitudinal du dispositif (13).
  2. Appareil selon la revendication 1, caractérisé en ce qu'il est prévu sur le chariot (29) une barre d'appui et de guidage (33) pour la lame de coupe (18), qui maintient ou guide la lame de coupe (18) au début d'un mouvement d'avance du chariot (29), au niveau nécessaire pour séparer un revêtement (12).
  3. Appareil selon la revendication 1, caractérisé en ce que la plaque de logement (21) est réglable en hauteur sur la partie de cadre (15) transversale du dispositif (13).
  4. Appareil selon la revendication 1 ou 3, caractérisé en ce que l'appareil de coupe (17) est monté pivotant et réglable dans un support (20) en U, qui est fixé sur la plaque de logement (21).
  5. Appareil selon l'une des revendications 1, 3 ou 4, caractérisé en ce que la plaque de logement (21) est portée par des vis à oeillet (22), suspendues à la partie de cadre (15) transversale du dispositif (13), et en ce qu'entre la plaque de logement (21) et la partie de cadre (15) transversale du dispositif (13), il est tendu au moins un ressort de pression (27).
  6. Appareil selon l'une des revendications 1, 3 à 5, caractérisé en ce que contre la surface supérieure de la plaque de logement (21) s'appliquent des vis (28) qui sont fixées sur la partie de cadre (15) transversale du dispositif (13) et forment des butées pour la plaque de logement (21).
  7. Appareil selon l'une des revendications 1 à 6, caractérisé en ce que plusieurs appareils de coupe (17) sont montés côte à côte, par leurs propres plaques de logement (21), sur la partie de cadre (15) transversale.
  8. Appareil selon la revendication 7, caractérisé en ce qu'il est prévu trois appareils de coupe (17) dont l'appareil central est décalé par rapport aux deux appareils de coupe (17) extérieurs dans la direction axiale du dispositif (13), par exemple de manière à dépasser vers l'avant.
  9. Appareil selon la revendication 1, caractérisé en ce que le chariot (29) est essentiellement constitué d'un élément (30) en forme de cadre aux angles duquel sont prévues les fixations (31) pour la dalle de sol double (10) et en ce que le chariot (29) est monté de manière à pouvoir se déplacer dans un mouvement de va-et-vient sur deux tiges de guidage (35), sur le cadre (14) du dispositif (13).
  10. Appareil selon la revendication 1, caractérisé en ce que sur le chariot (29) est fixé un écrou déplaçable (38) calé sur une broche filetée (39) et la broche filetée (39) est montée sur le cadre (14) du dispositif (13) de manière à pouvoir tourner, mais fixe axialement, et peut être entraînée par un moteur alternativement dans les deux sens de rotation.
  11. Appareil selon la revendication 10, caractérisé en ce qu'un accouplement à friction (46, 51) est monté dans la chaîne de transmission entre le moteur d'entraînement (42, 47) et la broche filetée (39).
  12. Appareil selon la revendication 10, caractérisé en ce que la broche filetée (39) est entourée par un ressort conique afin d'être protégée contre les salissures.
EP19900113628 1989-09-02 1990-07-17 Appareil pour enlever le revêtement de plaques formant double plancher ou de pièces similaires Expired - Lifetime EP0416252B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893929192 DE3929192A1 (de) 1989-09-02 1989-09-02 Geraet zum abtrennen von deckbelaegen an doppelbodenplatten oder dgl.
DE3929192 1989-09-02

Publications (2)

Publication Number Publication Date
EP0416252A1 EP0416252A1 (fr) 1991-03-13
EP0416252B1 true EP0416252B1 (fr) 1993-12-08

Family

ID=6388510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900113628 Expired - Lifetime EP0416252B1 (fr) 1989-09-02 1990-07-17 Appareil pour enlever le revêtement de plaques formant double plancher ou de pièces similaires

Country Status (7)

Country Link
US (1) US5091042A (fr)
EP (1) EP0416252B1 (fr)
AT (1) ATE98148T1 (fr)
CA (1) CA2024427A1 (fr)
DE (2) DE3929192A1 (fr)
DK (1) DK0416252T3 (fr)
ES (1) ES2047771T3 (fr)

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DE102009018156A1 (de) 2009-04-21 2010-11-18 Ev Group Gmbh Vorrichtung und Verfahren zum Trennen eines Substrats von einem Trägersubstrat
DE102012014509B4 (de) 2012-07-23 2015-10-22 Mamuka Kikaleishvili Vorrichtung und Verfahren zum Trennen eines Belages von einer Trägerplatte
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CN108221600B (zh) * 2018-03-20 2023-09-19 夏江 铺砖机行程控制装置
CN111379403B (zh) * 2020-03-30 2021-05-28 温州职业技术学院 一种室内设计用地板快速铺设装置
CN112392285B (zh) * 2020-11-07 2022-11-04 新疆圣源建工集团有限公司 一种建筑墙面处理机器人及其工作方法
CN112412082B (zh) * 2020-11-07 2022-10-18 深圳华澳建科集团有限公司 一种建筑油漆施工工艺

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DE3929192A1 (de) 1991-03-14
ES2047771T3 (es) 1994-03-01
DE3929192C2 (fr) 1992-05-27
CA2024427A1 (fr) 1991-03-03
EP0416252A1 (fr) 1991-03-13
DE59003774D1 (de) 1994-01-20
DK0416252T3 (da) 1994-02-21
ATE98148T1 (de) 1993-12-15
US5091042A (en) 1992-02-25

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