EP0277591B1 - Vorrichtung zur Erzeugung von dünnen Brettern - Google Patents

Vorrichtung zur Erzeugung von dünnen Brettern Download PDF

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Publication number
EP0277591B1
EP0277591B1 EP88101211A EP88101211A EP0277591B1 EP 0277591 B1 EP0277591 B1 EP 0277591B1 EP 88101211 A EP88101211 A EP 88101211A EP 88101211 A EP88101211 A EP 88101211A EP 0277591 B1 EP0277591 B1 EP 0277591B1
Authority
EP
European Patent Office
Prior art keywords
pressure
feed rollers
squared timber
cutting
cutting means
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
EP88101211A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0277591A2 (de
EP0277591A3 (en
Inventor
Gönner Siegmar
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.)
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Original Assignee
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
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 Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik filed Critical Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Priority to AT88101211T priority Critical patent/ATE79584T1/de
Publication of EP0277591A2 publication Critical patent/EP0277591A2/de
Publication of EP0277591A3 publication Critical patent/EP0277591A3/de
Application granted granted Critical
Publication of EP0277591B1 publication Critical patent/EP0277591B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/04—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed chains or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/06—Cutting strips from a stationarily- held trunk or piece by a rocking knife carrier, or from rocking trunk or piece by a stationarily-held knife carrier; Veneer- cutting machines
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6476—Including means to move work from one tool station to another
    • Y10T83/6483—Tool stations staggered relative to one another
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6584—Cut made parallel to direction of and during work movement
    • Y10T83/6587—Including plural, laterally spaced tools
    • Y10T83/6588—Tools mounted on common tool support

Definitions

  • the invention relates to a device for producing thin boards by cutting the boards without cutting from a log or squared timber on one or respectively opposite sides of the squared timber.
  • the device has a feed path for the squared timber and a cutting device arranged on one side of the feed path with one or more stiff blades which can be staggered one behind the other or can be made to oscillate to separate the boards.
  • the cutting device there is either a pressing device or one of the first corresponding second cutting devices, at least the pressing device or one of the cutting devices being able to be pressed against the squared timber and thus against the opposite cutting device.
  • the apparatus has feed means which advance the square timber against the knife or blades of the cutting devices with at least one pair of feed rollers which grip the square timber on opposite sides.
  • the basic concern with such non-cutting processes is to have a sufficiently good surface quality for the boards to achieve. This is very difficult because of the tendency of the wood to split and tear.
  • a device has been tested which has a cutting knife on one side and a pressure belt with pressure rollers on the opposite side. The pressure belt with the pressure rollers is used both for applying the pressure forces and the feed forces.
  • the contact pressure to achieve a good cut quality does not necessarily correspond to the pressure required to apply the high feed forces required against the cutting knife or the cutting knife set, the contact pressure cannot be selected solely according to the requirements of the cutting quality.
  • the object is achieved in that the feed means moving the squared timber consist of at least one pair of feed rollers gripping the squared timber on opposite sides, each pair of feed rollers being movable in a direction transverse to the feed path regardless of the clamping force exerted on the squared timber is arranged to be able to adapt to the position of the squared timber determined by the contact pressure on the cutting device while maintaining symmetrical clamping forces.
  • each pair of feed rollers including the force-generating means that apply the clamping force, is arranged on a carriage that is freely movable transversely to the feed direction.
  • the force-generating means that apply the clamping force are pressurized fluids that are articulated on the frame and that are articulated to the frame, each of the working cylinders of a pair of rollers being connected to one another by an overflow line.
  • a desired number of pairs of feed rollers can be arranged in front of and behind the cutting device. If, in the case of a device with a cutting device and an opposing pressure device, the latter consists of a sequence of pressure rollers which can be pressed individually against the squared timber and whose pressure force is transmitted to the squared timber via a circumferential rubber band, the rubber band can also wrap around the feed rollers located on the side of the pressure device.
  • the contact pressure of the pressure device or the second cutting device can expediently be controlled independently of the clamping force of the feed rollers.
  • the pairs of feed rollers in front of and behind the cutting device can advantageously be moved apart and adjusted independently of one another so that the front pairs of feed rollers can already be opened for inserting a new square timber if the previous square timber is still held by the rear pairs of feed rollers.
  • the contact pressure to achieve a good cut quality does not necessarily match the pressure required to apply the high feed forces required against the cutting knives, these elements have been separated.
  • the high forces on the feed rollers were not allowed to disrupt the position of the wood determined by the pressure of the wood on the cutting knives. Therefore, the pairs of feed rollers were arranged in a floating position relative to the pressure rollers or the second cutting knife device.
  • the device shown schematically in FIG. 1 in plan view passes through a timber 1 being processed in the direction of arrow 2 on a feed path (not shown), as is known in woodworking devices.
  • This feed path can consist, for example, of an elongated support plate, which is height-adjustable if necessary, on which the square timber 1 rests and slides along.
  • the device processing the squared timber 1 is arranged essentially on both sides of the feed line or the squared timber to be processed. It has a left frame part 3 and a right frame part 4, of which the right frame part 4 can be displaced transversely to the feed direction 2 of the square timber 1, for example by means of a spindle drive 5, on horizontal sliding supports 6.
  • the support structure 7 for the sliding guide 6 of the right frame part 4 can be connected to the left frame part 3 below the transport path by means of a common machine base.
  • the transverse movement of the right frame part 4 only serves to be able to move the left and right parts of the device apart and to be able to adjust the device to squares 1 of different widths.
  • the right frame part 4 is set to a fixed position and can be regarded as fixed to the frame in the following for the description of the operation of the machine like the left frame part 3.
  • the machine is divided into a feed device 8 seen in the feed direction 2 of the wood, which is only surrounded by a dash-dotted line to illustrate its functional relationship, the actual cutting device 9 and a pull-out device 10, which corresponds in structure to the feed device 8 and also for emphasis is surrounded by a dash-dotted line.
  • Each of these three functional groups 8, 9, 10 is divided into a portion that is located on the left frame part and one that is arranged on the right frame part.
  • the cutting device 9 consists of a knife holder 11, a knife 12 fastened to this, a pressure bar 13 arranged upstream of the knife edge and guide surfaces 14 provided on both sides of the knife arrangement.
  • the drawing shows how a thin board 15 from the square timber is laterally shown by the knife 12 1 separated and fed to a schematically illustrated straightening device 16, which, however, is not of particular interest in connection with the present invention.
  • the knife arrangement attached to the frame part 3 is provided on the frame part 4 opposite a sequence of pressure rollers 17. These pressure rollers are each pivotally mounted in a pivot point 19 in the right frame part 4 by means of a pivot arm 18.
  • a pressure cylinder 20 acts on each of the swivel arms 19 and is supported on the right frame part 4 with its other end fixed to the frame.
  • All pressure rollers 17 lie within a circumferential rubber belt 21, which is guided over two deflection rollers 22 and 23, which are also rotatably mounted in the right frame part 4. Via the rubber belt 21, the pressure rollers press the squared timber 1 against the on the pressurized cylinder 20 with pressure fluid opposite frame part 3 located knife assembly.
  • the pressure rollers 17 can be acted upon individually, but also jointly with pressure fluid.
  • the pressure bar 13 of the knife arrangement protrudes somewhat more in the direction of the square timber 1 than the guide surfaces 14.
  • the pressure bar 13 is pressed into the square timber 1 which is moving past. This is necessary in order to avoid splitting of the wood in front of the knife 12 when the boards 15 are cut without cutting.
  • the pressure and the manner in which the squared timber 1 is pressed against the knife arrangement is decisive for the quality of the products obtained, which is why the arrangement and design of the pressure rollers and the control of their contact pressure are of particular importance.
  • a device with a single knife 12 is shown. If necessary, however, a plurality of knives can also be arranged in a staggered manner one behind the other. Furthermore, it is possible to arrange the knife arrangement in a separate holder in the left frame part 3 in order to give it an oscillating movement in a direction perpendicular to the plane of the drawing which runs in the direction of the feed direction 2 during the cutting process.
  • the feed device 8 has two pairs of feed rollers 24 and 25, each of which has a left feed roller 26 and a right feed roller 27. Every feed roll 26, 27 is pivotally mounted in a pivot point 29 in one of the frame parts 3 and 4 by means of a pivot arm 28.
  • the pair of pinch rollers 24 is shown again separately in part in FIG. 3.
  • the working cylinders 30 of the feed rollers 26 and 27 can be acted upon with pressure fluid via a line 31.
  • the feed rollers 26 and 27 must generally be subjected to a higher contact pressure than is the case for an optimal cutting result with the pressure rollers 17.
  • the pressure rollers 17 and the feed rollers 26, 27 can therefore preferably be controlled separately with regard to their pressurization.
  • the rubber belt 21 also wraps around the right feed rollers 27.
  • the feed forces must therefore also be transmitted to the square timber 1 here via the rubber belt 2I.
  • This is pure Appropriate measure for constructional reasons, since if the deflection rollers 22 and 23 are arranged for the rubber belt outside the feed rollers 27, the latter can be positioned closer to the cutting device 9.
  • a front measuring barrier 33 and a rear measuring barrier 34 are also provided, which are located in the area of the pull-in device and the pull-out device. These measuring barriers are intended to signal the presence of a squared timber in the pull-in device 8 or the pull-out device 10 for a corresponding control of the device. It is within the meaning of the invention if not only the working cylinders 30 of each pair of feed rollers 24 and 25 are connected to one another by an overflow line 32, but all feed rollers can also be connected to one another by overflow lines in order to achieve a uniform contact pressure everywhere. The only important thing is that the feed rollers do not impose a position on the squared timber 1 which differs from that which is specified by the cutting device 9.
  • the feed rollers of the feed device 8 and the pull-out device 10 are separately controllable. With a continuous sequence of wood, it would basically suffice, just one To provide feed device.
  • the provision of a second feed device in the form of the draw-off device essentially has the purpose of being able to pull the end of a squared timber that is being processed through the cutting device 9 while the feed device is already engaging a new squared timber. If the end of a square timber passes one of the measuring barriers 33, 34, the associated feed device opens. If the start of a new square timber enters the measuring barrier, the associated feed device closes again.
  • FIG. 2 shows the schematic top view of a variant of the device according to FIG. 1, which has opposite knives 12, in order to simultaneously cut off a thin board 15 from opposite sides of the square timber 1.
  • the left cutting device shown above in the drawing corresponds exactly to that according to FIG. 1.
  • the right cutting device 35 shown below in FIG. 2 differs from the left one in that it is arranged within the right frame part 4 on an independent support 36. which is articulated at one end at 37 to the right frame part 4 and is supported at its other end by means of a pressure cylinder 38 on the frame part 4. By applying pressure fluid to the pressure cylinder 38, the pressure can be set with which the cutting devices 9 and 35 are pressed against the square timber 1.
  • the pressure-adjustable version of the cutting device 35 replaces the pressure rollers 17 of the embodiment according to FIG. 1. Since two cutting devices are provided according to FIG. 2, the rubber belt 21 surrounding the pressure rollers in FIG. 1 is also omitted. All the feed rollers 26, 27 are therefore located directly at Kantholz 1. In this version, too, the working cylinders of pairs of opposing feed rollers are connected to one another by an overflow line.
  • FIG. 4 shows another embodiment for the freely movable arrangement of a pair of feed rollers.
  • the feed rollers 40 and 41 are located on a carriage 42 which can be freely moved back and forth in guides 43 in the direction transverse to the feed direction 2. Since the carriage 42 can move transversely, it is only necessary in this embodiment to provide a feed roller of a pair of feed rollers, in the example the feed roller 40, with a working cylinder 44 which is supported on the carriage 42 itself.
  • This arrangement not only has the disadvantage that it is structurally more complex than the arrangement according to FIGS. 1-3, it also has the disadvantage that, with a limited working stroke of the working cylinder 44, the machine cannot be easily moved apart as a whole, such as this is provided by the provision of the movable frame part 4 in the embodiments of FIGS. 1-3.
  • the overflow pressure line 32 between the feed cylinders opposite to each other can be laid with enough reserve length to move both side parts of the machine as a whole apart.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Lubricants (AREA)
  • Glass Compositions (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Fats And Perfumes (AREA)
  • Details Of Cutting Devices (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
  • Physical Vapour Deposition (AREA)
EP88101211A 1987-01-31 1988-01-28 Vorrichtung zur Erzeugung von dünnen Brettern Expired - Lifetime EP0277591B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88101211T ATE79584T1 (de) 1987-01-31 1988-01-28 Vorrichtung zur erzeugung von duennen brettern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873702909 DE3702909A1 (de) 1987-01-31 1987-01-31 Vorrichtung zur erzeugung von duennen brettern
DE3702909 1987-01-31

Publications (3)

Publication Number Publication Date
EP0277591A2 EP0277591A2 (de) 1988-08-10
EP0277591A3 EP0277591A3 (en) 1989-11-15
EP0277591B1 true EP0277591B1 (de) 1992-08-19

Family

ID=6319954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101211A Expired - Lifetime EP0277591B1 (de) 1987-01-31 1988-01-28 Vorrichtung zur Erzeugung von dünnen Brettern

Country Status (8)

Country Link
US (1) US4825917A (zh)
EP (1) EP0277591B1 (zh)
JP (1) JPS63214403A (zh)
AT (1) ATE79584T1 (zh)
CA (1) CA1316083C (zh)
DE (3) DE3702909A1 (zh)
FI (1) FI86697C (zh)
NO (1) NO164584C (zh)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926396A1 (de) * 1989-08-10 1991-02-14 Linck Masch Gatterlinck Vorrichtung zum spanlosen zerlegen eines baumstammes in holzerzeugnisse
DE4042357A1 (de) * 1989-11-01 1991-10-24 Linck Masch Gatterlinck Verfahren zum spanlosen erzeugen von brettern gleicher dicke
DE4026346A1 (de) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Verfahren zum spanlosen aufteilen eines kantholzes in bretter gleicher dicke
DE3936314A1 (de) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Mehrschichtmassivholzerzeugnisse wie balken, bretter und leimbinder sowie verfahren zu deren herstellung
DE3936312A1 (de) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Verfahren zum herstellen einer mehrschicht-massivholzplatte
DE4026349C1 (en) * 1990-08-21 1991-11-14 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De Slicing thin sheets of wood - involves forcing series of sharp knives through wood for cutting without formation of chips
DE4033471A1 (de) * 1990-10-20 1992-04-23 Linck Masch Gatterlinck Verfahren und vorrichtung zum spanlosen abtrennen von holzlamellen von einem kantholz
DE4038486A1 (de) * 1990-12-03 1992-06-04 Linck Masch Gatterlinck Vorrichtung zur schneidenden erzeugung von duennen brettern
DE4117474A1 (de) * 1991-05-28 1992-12-03 Hamberger Industriewerke Gmbh Verfahren und vorrichtung zur herstellung von holzlamellen
DE4201339C1 (zh) * 1992-01-20 1992-07-23 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De
US5400843A (en) * 1992-04-14 1995-03-28 Gebruder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co. Kg Apparatus for controlling the taper of wood boards formed by a chipless cutting operation
DE4244310C1 (de) * 1992-12-28 1993-10-28 Linck Masch Gatterlinck Verfahren und Anlage zum schneidenden Aufteilen eines Kantholzes in Bretter vorbestimmter Dicke
CA2114672C (en) * 1993-11-12 1999-03-16 Aaron U. Jones Sawing apparatus
US5771586A (en) * 1994-09-07 1998-06-30 Flexible Steel Lacing Company Apparatus for skiving belt ends
US5881786A (en) * 1997-06-10 1999-03-16 Weyerhaeuser Company Method of producing wood strips for conversion into composite lumber products
EP0932123B1 (de) * 1998-01-23 2003-12-03 BEB Industrie-Elektronik AG Vorrichtung zur Verarbeitung von wertpapierähnlichen Gegenständen
US6378692B1 (en) * 1999-10-04 2002-04-30 Lockheed Martin Corporation Take-away mechanism for mail or other flat article handling system
NL1023232C2 (nl) * 2003-04-22 2004-10-26 Franciscus Antonius Ma Heijden Werkwijze voor het produceren van massief houten planken of balken.
JP5512648B2 (ja) * 2011-12-28 2014-06-04 セイコープレシジョン株式会社 Ｘ線処理装置
US20160221327A1 (en) * 2012-10-12 2016-08-04 Heidelberger Druckmaschinen Ag Web insertion device for a flat-bed die-cutting machine, manufacturing system for packages and method for feeding a web of printing material
US11090896B2 (en) * 2012-10-12 2021-08-17 Heidelberger Druckmaschinen Ag Web insertion device for a flat-bed die-cutting machine, manufacturing system for packages and method for feeding a web of printing material
CN114179175A (zh) * 2021-12-21 2022-03-15 杭州简筑装饰工程有限公司 一种防护效果好的家装板材切割装置
IT202200002024A1 (it) * 2022-02-04 2023-08-04 Ecosys S R L Apparato per lavorazione e/o trattamento di una regione di bordo di un pezzo da lavorare

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1503784A (en) * 1922-04-08 1924-08-05 Commw Mfg Company Machine for producing rattan weaving strips
JPS5160084A (en) * 1974-11-20 1976-05-25 Matsushita Electric Ind Co Ltd Itajobuzaino setsudansochi
US3494396A (en) * 1953-02-02 1970-02-10 Weyerhaeuser Co Apparatus for kerfless cutting of wood
US3295569A (en) * 1962-05-31 1967-01-03 Corlise M Sweet Machine for cutting wood with a fixed blade
US3727654A (en) * 1971-04-21 1973-04-17 Marunaka Tekkosho Inc Planer machine
SE431621B (sv) * 1980-07-03 1984-02-20 Kockums Ind Ab Anordning for inleggning av virkesblock lengs en inmatningsbana i en virkesbearbetningsmaskin
AT368929B (de) * 1980-12-22 1982-11-25 Rautio Kauko Zentrier- und vorschubeinrichtung fuer eine maschine zum behauen runder staemme
DE3343294A1 (de) * 1983-11-30 1985-06-05 Gebrüder Linck Maschinenfabrik und Eisengießerei "Gatterlinck", 7602 Oberkirch Vorrichtung zur erzeugung von kantholz durch spanloses abtrennen von seitenbrettern
CA1264433A (en) * 1985-12-23 1990-01-16 Troels A. Jaeger Wood slicing machine

Also Published As

Publication number Publication date
EP0277591A2 (de) 1988-08-10
FI86697B (fi) 1992-06-30
NO880400L (no) 1988-08-01
CA1316083C (en) 1993-04-13
JPS63214403A (ja) 1988-09-07
US4825917A (en) 1989-05-02
DE8701511U1 (de) 1988-05-26
NO880400D0 (no) 1988-01-29
EP0277591A3 (en) 1989-11-15
FI86697C (fi) 1992-10-12
FI880415A (fi) 1988-08-01
ATE79584T1 (de) 1992-09-15
NO164584B (no) 1990-07-16
DE3702909A1 (de) 1988-08-11
NO164584C (no) 1990-10-24
FI880415A0 (fi) 1988-01-29
DE3873782D1 (de) 1992-09-24

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