DK166743B1 - CIRCUIT BUNDLES CONSISTING OF NUMBER OF PARALLEL FORMS - Google Patents
CIRCUIT BUNDLES CONSISTING OF NUMBER OF PARALLEL FORMS Download PDFInfo
- Publication number
- DK166743B1 DK166743B1 DK278487A DK278487A DK166743B1 DK 166743 B1 DK166743 B1 DK 166743B1 DK 278487 A DK278487 A DK 278487A DK 278487 A DK278487 A DK 278487A DK 166743 B1 DK166743 B1 DK 166743B1
- Authority
- DK
- Denmark
- Prior art keywords
- tube bundle
- tubes
- bundle element
- band
- another
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5227—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
- B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
- B29L2031/602—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- External Artificial Organs (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
DK 166743 B1 iDK 166743 B1 i
Opfindelsen angår et rørbundtelement bestående af et antal parallelt med hinanden forløbende formstofrør, hvor de enkelte rør er sammenfattede ved hjælp af fleksible bånd, og hvor båndene forløber tangentielt til enkeltrørene hen 5 over bredden af rørbundtet og er fast forbundne med definerede overfladeområder på enkeltrørene.BACKGROUND OF THE INVENTION This invention relates to a plurality of tubular members consisting of a plurality of parallel tubular tubes in which the individual tubes are joined by flexible strips and the strips extend tangentially to the single tubes 5 across the width of the tubular bundle and are firmly connected to defined surface areas of the single tubes.
Et sådant rørbundtelement kendes fra tysk brugsmønster nr. DE-U 82 13 407.3. Ved dette kendte rørbundtelement er enkeltrørene ved hjælp af fleksible afstandsstykker 10 sammenfattede til en måtte. Afstandsstykkernes fleksibilitet tillader, at rørelementet fra den stilling, hvor enkeltrørene ligger plant ved siden af hinanden, kan sammenklappes til et rørbundt. Alt efter længden af afstandsstykkerne kan denne sammenklapning ske på en sådan måde, at enkeltrørene berører 15 hinanden linieformet og alligevel fastholdes til hinanden ved hjælp af afstandsstykkerne. Dette rørbundtelement har den ulempe, at det er kompliceret at fremstille, og at der kan være fare for, at afstandsstykkerne afrives, f .eks. når dette til et rrøbundt sammenklappede rørbundtelement trækkes ind i 20 kabelbeskyttelsesrør, der er nedlagt i jorden.Such a tube bundle element is known from German usage pattern No. DE-U 82 13 407.3. In this known tube bundle element, the individual tubes are joined to a mat by means of flexible spacers 10. The flexibility of the spacers allows the tube element from the position where the individual tubes lie flat next to each other can be collapsed into a tube bundle. Depending on the length of the spacers, this collapse can occur in such a way that the individual tubes touch each other in a linear fashion and yet be held together by the spacers. This tube bundle element has the disadvantage that it is complicated to manufacture and that there may be a danger of the spacers being torn off, e.g. when this into a tube bundle collapsed tube bundle element is pulled into 20 cable protection tubes laid down in the ground.
Fra tysk patentskrift DE-A 36 06 767.9 kendes et fleksibelt, lukket rørbundtelement, der er dannet af rør, der er forbundne med hinanden ved hjælp af fleksible bånd. Også i dette tilfælde ligger enkeltrørene parallelt med hinanden 25 i rørbundtelementet, hvor enkeltrørene ved hjælp af de fleksible bånd er forbundne med hinanden med en indbyrdes afstand. I modsætning til den førstnævnte konstruktion, ved hvilken rørene ved hjælp af de fleksible afstandsstykker er forenede til en måtte, fås her et rørbundt, i hvilket alle 30 enkeltrørene er forbundne med hinanden ved hjælp af båndene, der holder dem i afstand fra hinanden. I begge tilfælde opnås, at rørbundtelementet kan oprulles på en tromle, uden at rørbundtelementet skal adskilles.German patent specification DE-A 36 06 767.9 discloses a flexible, closed tube bundle element formed of tubes connected to each other by means of flexible tapes. Also in this case, the single tubes are parallel to each other 25 in the tube bundle element, where the single tubes are connected to each other by a distance from one another by means of the flexible bands. In contrast to the former construction, in which the tubes are joined to a mat by means of the flexible spacers, there is obtained a tube bundle in which all the 30 individual tubes are connected to each other by means of the straps which keep them spaced apart. In both cases, the tube bundle element is obtained on a drum without having to separate the tube bundle element.
Endvidere kendes fra DE-A 32 10 404 et rørbundtele-35 ment bestående af et antal parallelt med hinanden forløbende formstofrør, hvor enkeltrørene er sammenfattede ved hjælp af et fleksibelt bånd. Båndet forløber derved ensidigt tangenti- DK 166743 B1 2 alt over rørbundtelementets bredde og er med definerede overfladeområder fast forbundet med enkeltrørene. Lignende rørbundtelementer kendes fra DE-A 33 08 279 og DE-A 25 39 210.Furthermore, from DE-A 32 10 404 there is known a tube bundle element consisting of a plurality of parallel pipes, the single tubes being joined by a flexible band. The band thereby extends unilaterally tangent to the entire width of the tube bundle element and is fixedly fixed to the single tubes with defined surface areas. Similar tube bundle elements are known from DE-A 33 08 279 and DE-A 25 39 210.
5 Formålet med opfindelsen er, under videreudvikling af den kendte teknik, at tilvejebringe et rørbundtelement, i hvilket enkeltrørene ud over den ensidige radiale forskydelighed inden for forud fastlagte grænser også er aksialt forskydelig. Dette opnås ifølge opfindelsen ved, at enkel-10 trørene sammenholdes til rørbundtelementet af et spiral viklet bånd.The object of the invention, in further development of the prior art, is to provide a tube bundle element in which the single tubes, in addition to the unilateral radial displacement within predetermined limits, are also axially displaceable. This is achieved according to the invention by comparing the single tubes to the tube bundle element of a spirally wound band.
Fremstillingen af et sådant rørbundtelement kan ske på enkel vis. Enkeltrørene kan her fremstilles med simple rørværktøjer. Efter fremstillingen fastholdes de liggende 15 plant parallelt med hinanden i strakt tilstand og det spiralviklede forbindelsesbånd er fast forbundet med de pågældende overfladeområder på enkeltrørene. Denne faste forbindelse kan f.eks. ske ved svejsning, fortrinsvis ved ultralydsvejsning. Forbindelsen kan også ske ved klæbning. I 20 en foretrukket udførelsesform befinder båndets viklinger sig i definerede indbyrdes afstande.The manufacture of such a tube bundle element can be accomplished in a simple manner. The single pipes can be manufactured here with simple pipe tools. After manufacture, the lying planes are held parallel to each other in the stretched state and the coil wound band is firmly connected to the respective surface areas of the single tubes. This solid compound can e.g. is done by welding, preferably by ultrasonic welding. The dressing can also be bonded. In a preferred embodiment, the band windings are at defined spacing.
En særlig fordel i forhold til tangentialt på tværs af rørakserne anbragte holdebånd består i, at den spiralfor-mige vikling tillader aksial forskydning af rørbundtelemen-25 tets enkeltrør indbyrdes.A particular advantage over tangentially arranged straps arranged across the pipe axes is that the helical winding allows axial displacement of the pipe bundle member's single pipe.
Denne forskydningsmulighed er især af interesse, når rørbundtelementet skal udlægges som et bånd af ved siden af hinanden anbragte enkeltrør uden omsluttende kabelbeskyttelsesrør i jorden. På grund af den aksiale forskydelig-30 hed for enkeltrørene indbyrdes optræder der i dette tilfælde, eksempelvis ved udlægning af rørbundtelementet i en bøjning, ikke skadelige over- eller underindgribning af et eller flere enkeltrør under henholdsvis over et andet rør i rørbundtet.This displacement option is of particular interest when the pipe bundle element is to be laid out as a band of adjacent single pipes without enclosing cable protection pipes in the ground. Due to the axial displacement of the individual tubes, in this case, for example, when laying the tube bundle element in a bend, no harmful over or under engagement of one or more single tubes occurs, respectively, over another tube in the tube bundle.
Den ved krumningen nødvendige længdeudligning opnås ifølge 35 opfindelsen ved enkeltrørenes indbyrdes længdeforskydelighed under samtidig fastholdning af disse i rørbundtet.According to the invention, the length equalization required by the curvature is achieved by the longitudinal displacement of the individual tubes while simultaneously retaining them in the tube bundle.
Enkeltrørene kan også hensigtsmæssigt være fikseret 3 DK 166743 B1 i defineret indbyrdes afstand parallelt forløbende ved siden af hinanden ved hjælp af det spiralviklede bånd. Derved opnås en ekstra radial og aksial forskydningsmulighed for rørbund-telementet i forhold til rørbundtelementet ifølge opfindelsen 5 med op ad og langs hinanden liggende enkeltrør.The single tubes may also conveniently be fixed parallel to one another by means of the spirally wound band. Thereby, an extra radial and axial displacement possibility is obtained for the tube bottom element relative to the tube bottom element according to the invention 5 with single and adjacent single pipes.
Opfindelsen vil i det følgende blive nærmere forklaret i forbindelse med nogle udførelseseksempler for rørbundtelementet og under henvisning til tegningen, hvor fig. 1 viser et kendt rørbundtelement med forbindelsesbånd og 10 parallelt ved siden af hinanden anbragte enkeltrør, fig. 2 det i fig. 1 viste rørbundtelement i sammenklappet tilstand, og fig. 3 et rørbundtelement ifølge opfindelsen med spiralformet omviklet forbindelsesbånd.The invention will be explained in more detail below with reference to some exemplary embodiments of the tube bundle element and with reference to the drawing, in which fig. 1 shows a known tube bundle element with connecting strips and 10 parallel tubes arranged parallel to one another; FIG. 2 shows the embodiment of FIG. 1 in the collapsed state, and FIG. 3 shows a tube bundle element according to the invention with a helical wound band.
15 Det i fig. 1 viste rørbundtelement består af fire enkeltrør 11-14. I definerede overfladeområder på enkeltrørene 11-14 er fastgjort forbindelsesbånd 2, 3.15 The embodiment of FIG. 1 tube bundle element consists of four single tubes 11-14. In defined surface areas of the single pipes 11-14, connecting strips 2, 3 are attached.
I det viste eksempel er hvert forbindelsesbånd 2, 3 fastgjort til hvert af forbindelsesrørene 11-14 via to 20 svejsesteder 21, 22 og 31, 32.In the example shown, each connecting strip 2, 3 is attached to each of the connecting tubes 11-14 via two 20 welding locations 21, 22 and 31, 32.
Forbindelsesbåndene 2, 3 kan fastgøres til overfladen af enkeltrørene 11-14 i en hvilken som helst ønsket afstand fra hinanden. I stedet for den beskrevne sammensvejsning ved hjælp af ultralyd kan der også anvendes andre 25 svejsemetoder eller fastklæbning af båndene 2, 3 i overfladeområderne af enkeltrørene 11-14. Forudsætningen herfor er, at der vælges et passende klæbemiddel.The connecting strips 2, 3 can be attached to the surface of the individual tubes 11-14 at any desired distance from one another. Instead of the described welding by ultrasound, other welding methods or bonding of the strips 2, 3 in the surface areas of the single tubes 11-14 can also be used. The prerequisite for this is that an appropriate adhesive is selected.
Ved den i fig. 1 viste vandrette stilling for enkeltrørene, hvor disse ligger vandret plant ved siden af 30 hinanden, kan rørbundtet på grund af formstoffets iboende bøjelighed nemt oprulles på en tromle. Herunder er de i de definerede overfladeområder af enkeltrørene 11-14 fastgjorte bånd 2, 3 tilstrækkelige til at holde rørbundtet sammen under oprulningen på tromlen og under den efterfølgende 35 oplagring samt under rørbundtets senere afrulning fra tromlen.In the embodiment shown in FIG. 1 in the horizontal position of the individual tubes, where they lie horizontally flat next to each other, the tube bundle can be easily wound on a drum due to the inherent flexibility of the plastic material. Below, the straps 2, 3 fixed in the defined surface areas of the single tubes 11-14 are sufficient to hold the tube bundle together during the reel on the drum and during subsequent storage and during the subsequent reel of the tube bundle from the drum.
Fig. 2 viser rørbundtet 1 i sammenklappet stilling.FIG. 2 shows the tube bundle 1 in the collapsed position.
4 DK 166743 B14 DK 166743 B1
Enkeltrørene er klappet sammen i den af de fastgjorte forbindelsesbånd 2, 3 definerede retning.The single tubes are folded together in the direction defined by the fastening straps 2, 3.
Fig. 3 viser rørbundtet ifølge opfindelsen med et forbindelsesbånd 2, der er viklet spiralformigt rundt om de 5 plant ved siden af hinanden liggende enkeltrør 11, 12, 13 og 14. Forbindelsesbåndet 2 kan også her være fastgjort til hver af de pågældende overfladeområder af enkeltrørene 11-14 ved hjælp af kun to sammensvejsningssteder 21, 22. Forbindelsesbåndet 2 kan ifølge opfindelsen være anbragt på en sådan 10 måde, at enkeltrørene 11-14 ligger plant ved siden af hinanden med en bestemt eller defineret indbyrdes afstand. Fordelen ved denne anbringelsesmåde er, at det på denne måde dannede rørbundt 1 ikke blot kan forskydes i radial retning, men at enkeltrørene 11-14 også kan forskydes indbyrdes i 15 aksial retning. Dette er her især vigtigt ved lægning af rørbundtet 1 i kurver. Her kan stigningen af forbindelsesbåndets 2 spiralform vælges på en sådan måde, at der ved den aksiale indbyrdes forskydning af enkeltrørene er taget hensyn til de krumninger, f.eks. af et i jorden nedlagt 20 kabelbeskyttelsesrør, som rørbundtelementet skal kunne følge.FIG. 3 shows the pipe bundle according to the invention with a connecting band 2 which is spirally wound around the 5 planar adjacent single tubes 11, 12, 13 and 14. The connecting band 2 may also be attached here to each of the relevant surface areas of the single tubes 11- 14 by means of only two welding locations 21, 22. According to the invention, the connecting band 2 may be arranged in such a way that the individual tubes 11-14 are flush with each other at a certain or defined spacing. The advantage of this method of application is that the tubular bundle 1 thus formed can not only be displaced in the radial direction, but that the individual tubes 11-14 can also be displaced mutually in the axial direction. This is especially important here when laying the tube bundle 1 in curves. Here, the rise of the spiral shape of the connecting band 2 can be chosen in such a way that the curvature of the single pipes takes into account the curvature, e.g. of a grounded 20 cable protection pipe which the pipe bundle element must be able to follow.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3625127A DE3625127C1 (en) | 1986-03-01 | 1986-07-22 | Pipe assembly comprising polymeric pipes |
| DE3625127 | 1986-07-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK278487D0 DK278487D0 (en) | 1987-06-01 |
| DK278487A DK278487A (en) | 1988-01-26 |
| DK166743B1 true DK166743B1 (en) | 1993-07-05 |
Family
ID=6305934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK278487A DK166743B1 (en) | 1986-07-22 | 1987-06-01 | CIRCUIT BUNDLES CONSISTING OF NUMBER OF PARALLEL FORMS |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0253953B1 (en) |
| AT (1) | ATE82818T1 (en) |
| DK (1) | DK166743B1 (en) |
| ES (1) | ES2036538T3 (en) |
| FI (1) | FI86763C (en) |
| GR (1) | GR3006762T3 (en) |
| NO (1) | NO872082L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004059593B4 (en) * | 2004-12-10 | 2009-04-02 | Gabo Systemtechnik Gmbh | pipe Association |
| US20070042148A1 (en) * | 2005-08-19 | 2007-02-22 | Stieler David C | Tether attachment to plastic coated metal tubing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1908993C3 (en) * | 1969-02-22 | 1974-05-22 | Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover | Tube bundle cable |
| DE2539210A1 (en) * | 1975-09-03 | 1977-03-17 | Gerhard Dipl Ing Pruefling | Plastic piping system for central heating - has outer flow and return pipes rigidly connected together for stability |
| DE7613404U1 (en) * | 1976-04-28 | 1976-09-23 | Kunststoffwerk Gebrueder Anger Gmbh & Co Muenchen, 8000 Muenchen | Cable protection tube with corrected pull-in tubes |
| DE3210404A1 (en) * | 1982-03-22 | 1983-09-22 | Thyssen Plastik Anger KG, 8000 München | Cable duct |
| DE3308479C2 (en) * | 1983-03-10 | 1987-01-22 | kabelmetal electro GmbH, 3000 Hannover | Device for laying communication cables with optical fibers in the ground |
-
1987
- 1987-03-26 EP EP87104483A patent/EP0253953B1/en not_active Expired - Lifetime
- 1987-03-26 ES ES198787104483T patent/ES2036538T3/en not_active Expired - Lifetime
- 1987-03-26 AT AT87104483T patent/ATE82818T1/en not_active IP Right Cessation
- 1987-05-19 NO NO87872082A patent/NO872082L/en unknown
- 1987-06-01 DK DK278487A patent/DK166743B1/en not_active IP Right Cessation
- 1987-07-09 FI FI873038A patent/FI86763C/en not_active IP Right Cessation
-
1993
- 1993-01-11 GR GR930400018T patent/GR3006762T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI873038A0 (en) | 1987-07-09 |
| FI86763C (en) | 1992-10-12 |
| DK278487D0 (en) | 1987-06-01 |
| FI873038A (en) | 1988-01-26 |
| ES2036538T3 (en) | 1993-06-01 |
| NO872082D0 (en) | 1987-05-19 |
| EP0253953A2 (en) | 1988-01-27 |
| ATE82818T1 (en) | 1992-12-15 |
| FI86763B (en) | 1992-06-30 |
| GR3006762T3 (en) | 1993-06-30 |
| DK278487A (en) | 1988-01-26 |
| NO872082L (en) | 1988-01-26 |
| EP0253953A3 (en) | 1989-12-20 |
| EP0253953B1 (en) | 1992-11-25 |
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