EP0579809A1 - Verfahren zum herstellen von fertigbauteilen aus spannbeton mit sofortigem verbund, insbesondere von spannbetonschwellen, sowie einrichtung zum durchführen des verfahrens. - Google Patents
Verfahren zum herstellen von fertigbauteilen aus spannbeton mit sofortigem verbund, insbesondere von spannbetonschwellen, sowie einrichtung zum durchführen des verfahrens.Info
- Publication number
- EP0579809A1 EP0579809A1 EP93903923A EP93903923A EP0579809A1 EP 0579809 A1 EP0579809 A1 EP 0579809A1 EP 93903923 A EP93903923 A EP 93903923A EP 93903923 A EP93903923 A EP 93903923A EP 0579809 A1 EP0579809 A1 EP 0579809A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tensioning
- wires
- frame
- clamping
- prestressed concrete
- 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.)
- Granted
Links
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 230000002787 reinforcement Effects 0.000 claims description 23
- 239000004567 concrete Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 3
- 230000000284 resting effect Effects 0.000 abstract 1
- 241001669679 Eleotris Species 0.000 description 25
- 238000009415 formwork Methods 0.000 description 7
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
- E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
- E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
- E01B3/34—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement with pre-tensioned armouring or reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles
Definitions
- the invention relates to a method for producing prefabricated components from prestressed concrete with an immediate bond, in particular prestressed concrete sleepers, according to the preamble of claim 1 and to a device for carrying out the method according to the preamble of claim 4.
- Prestressed concrete sleepers are mass articles which are pronounced as prefabricated concrete components and where everything is important, at least while maintaining, but if possible, while improving the quality, to save manufacturing costs. This can be done either by saving material for the sleepers themselves or by saving production costs, be it in terms of the equipment to be kept available for production or in terms of the working time to be used.
- This known prestressed concrete sleeper can be produced both with ortress against the hardened concrete and subsequent assembly, as well as in the prestressed bed, ie with immediate assembly.
- the sleepers in the prestressed bed in which the individual tension wires are anchored at their ends by adhesive bonding, for example the partially considerable expenditure for the anchoring parts of the individual span elements, which is tensioned against the hardened concrete in the case of prestressed concrete sleepers with a subsequent connection, can be avoided Need to become .
- Prestressed concrete sleepers with an immediate bond are usually manufactured in the long prestressed bed.
- the tensioning wires are first laid out, tensioned against fixed end abutments and concreted in when tensioned.
- a large number of formwork forms are required, which are to be arranged on the fitted bed.
- the tension wires are only released from their anchors or cut between the individual sleepers after the hardening of the sleeper bodies, whereby the tension force entered as tensile force in the tension wires is transmitted to the sleepers as pretensioning force.
- the tensioning wires are first cut to length, then guided into the tensioning frame and tensioned relative to the tensioning frame by means of a tensioning device integrated in the tensioning frame.
- the invention has for its object to come to a more economical way of working in the production of prestressed concrete sleepers with immediate bond using stenter, especially to improve the processes of inserting the tension wires into the stenter and the tensioning process itself, especially to simplify and accelerate.
- this object is achieved by the method steps specified in the characterizing part of patent claim 1 and by the device specified in the characterizing part of claim 4.
- the basic idea of the invention is that the tensioning wires, which run directly from one or more wire rolls, are inserted into the tensioning frame, then tensioned and only then cut to length. Since it, the work steps previously divided into several production stations, such as cutting, inserting and tensioning the wires, are combined in a single station; the tedious and laborious, as well as time-consuming handling of the previously cut individual wires is eliminated.
- the prerequisite for this, however, is that a wire reel is provided for each of the tensioning wires in a reinforcement consisting of several tensioning wires in order to be able to insert all of the tensioning wires into the tensioning frame in a single feed operation.
- the insertion of the tensioning wires into the tensioning frame can be considerably facilitated and accelerated by a wire guiding device according to claim 9 with a number of guide channels for a tensioning wire, which simultaneously, orderly and sag-free insertion of all wires for both parallel and crossing tension wires for Prestressed concrete sleepers allowed.
- This not only eliminates the need to arrange the tensioning wires after pulling them in; Since the tension wires have no or at least all the same sag, the pretension can be applied simultaneously and in one pull.
- this device is not limited to stenter frames.
- Such a wire guide device can also be used in production methods in which the tensioning wires are inserted and clamped against a tie form.
- FIG. 1 schematically shows the formation of a prestressed concrete sleeper with te ls parallel to one another, partly crossed tension wires,
- Fig. 3 is an end view of the prestressed concrete threshold in the direction III-III and
- Fig. 5 in a schematic representation of a plan view
- F g. 6 is a view of a device according to the invention.
- Fig. 7 is a plan view of a wire guide device in the closed state
- Fig. 8a and b end views of the wire guide device along "the line VIII-VIII in Fig. 7 in the closed and open state, the 9a and b cross sections through the
- Fig. 10 is a view of a movable outer part of the
- the sleeper body 1 consists of two comparatively wide lateral support bodies 2 and 3 which carry the rail fastening (not shown for the sake of clarity) and a central part 4 with a comparatively narrow, high cross-section.
- the prestressing reinforcement consists of eight straight tension wires 5, which are additionally labeled a to h to make their course clear.
- the prestressing reinforcement comprises two pairs of tension wires a and b or e and f, which pass through the sleeper body 1 parallel to its longitudinal axis, and two further pairs of tension wires c and d or g and h, which cross each other i the central axis of the sleeper body 1 .
- the end anchors of the tensioning wires 5, which are made by adhesive bonding, are distributed evenly at the ends of the threshold over their cross-section (FIG. 3); in the central axis of the sleeper body 1, the tension wires 5 are very strongly concentrated in a vertical axis (FIG. 4).
- the relatively wide support body 2, 3 with slim Middle part 4 of the sleeper body 1 enables, of course, other embodiments are also conceivable and can be implemented both by the method and by the device according to the invention, for example reinforcements that consist exclusively of parallel tensioning wires, as well as reinforcements that consist exclusively of one another tension wires crossing the central axis.
- the tension wires 5 In order to be able to produce a pre-stressed concrete tie with an immediate bond in this way, the tension wires 5 must be brought together in advance in a position that results in the desired reinforcement and tensioned in this position and held within a formwork form until the concrete in which the tension wires are are embedded in the formwork form, compacted and hardened. This is done according to the invention by means of a tenter and by means of a device which is shown schematically in FIGS. 5 and 6.
- the device according to the invention comprises a feed path 6 which extends over rows of supports 7 and over which a number of clamping frames can be pushed in the direction of arrow 9, of which only one clamping frame 8 is shown.
- a support structure for a stenter frame is sufficient if these are supplied in a different way.
- a station S is formed, at which the tensioning wires 5 can be fed and brought into their positions in the tensioning frame 8.
- a wire bearing with a number of wire rings 10 is assigned to the side of the station S, which corresponds to the number of individual tensioning wires from which the respective reinforcement is composed. In FIG. 5, only two Draht ⁇ 'length 10 is shown; further wire rings connect to the outside.
- the station S is assigned to a feed device 11 for the tensioning wires 5, which also has a number of wires corresponding to the number of wires, and a number of driven roller pairs 12, as well as a tensioning device 13, which is supported in a bridge-like manner with two tensioning cylinders 14 relative to the tensioning frame 8.
- the feed device 11 and the tensioning device 13 are combined as a unit on a carriage 15 which can be moved by means of rollers 16 in the direction of the axis of symmetry of the reinforcement to be produced in order to be able to absorb the elongation of the wires which occurs during tensioning.
- the tensioning device 13 is equipped with a known clamping device 17, by means of which the tensioning wires 5 running between the clamping plates can be clamped and released again by a single lifting movement.
- the clamping frame 8 consists of a re hteckför i gene frame from two side longitudinal members 18, a front edge cross member 19, a rear edge cross member 20 and an intermediate cross member 21.
- the clamping frame 8 are formed as a steel structure expediently from rolling profi les.
- the clamping frame 8 shown in FIGS. 5 and 6 comprises positions I to IV, in which a prestressed concrete sleeper can be produced.
- lemming anchors 17 are arranged in the area of the edge cross members 19 and 20, which correspond to those on the tensioning device 13.
- REPLACEMENT LEAF 5 has reached the position shown in Fig. 5, the tension wires 5 are advanced by the wire rings 10 by means of the feed device 11 in the direction of arrows 23 and brought into the position required for the respective reinforcement in positions I and II.
- the positioning of the individual tensioning wires 5 is served by a wire guide device 24, of which two identical units are arranged one behind the other in the direction of the reinforcement axis.
- the wire guide devices 24 can by a. vertical lifting movement in the plane of the clamping frame 8 or removed from this level. From this wire guide device 24, which will be explained in more detail with reference to FIGS. 7 to 10, the left unit is raised into the plane of the clamping frame 8 according to FIG. 6, the right unit is shown lowered.
- a clamping frame 8 can be retracted into the station S in a horizontal feed.
- the two wire guide devices 24 are then raised in the positions I and II of the clamping frame 8.
- the tensioning wires 5 are inserted and first anchored to the front edge cross member 19 by means of the clamping anchor 17.
- the tensioning wires 5 are tensioned by means of the tensioning device 13 and also anchored by means of the clamping anchor 17 on the rear edge cross member 20.
- the wires 5 are then cut by means of a wire cutting device 25 and the clamping anchor 17 on the tensioning device 13 is released.
- the clamping frame 8 is transported in the feed direction (arrow 9) until the positions III and IV in the station S are above the wire guide device 24.
- the tensioning wires 5 are inserted, tensioned and anchored in the same way at these positions.
- the clamping frame 8 provided with tensioned tensioning wires in this way is then transported further in the feed direction (arrow 9). It is then brought together with the formwork forms, which are pushed over the tensioned tension wires and into which the concrete can finally be introduced.
- the formwork can be removed before the concrete is completely hardened by means of immediate demoulding.
- the stenter is initially left in its position with respect to the fresh sleepers until the concrete has completely hardened and the tension can be transferred to the sleeper body by loosening the clamping anchors 17. Thereafter, the tenter 8, if necessary, are cleaned and reused via the feed path.
- a wire guide device 24 is shown in plan view in FIG. 7 and in further views or sections in FIGS. 8 to 10.
- the wire guide device 24 is used to position the tensioning wires 5 for reinforcement, as is the case with a prestressed concrete sleeper according to FIGS. 1 to 4.
- this reinforcement arrangement is chosen only as an example; the wire guide device 24 according to the invention can of course also be used in an analogous manner for other forms of reinforcement.
- the wire guide device 24 consists of a number of partially fixed, partially movable components, each of which two in the closed state shown in FIGS. 7 and 8a and 9a form guide channels 30 for each a tension wire 5.
- 7 according to the image of the reinforcement symmetrical to the central axis of the threshold, consists of two fixed triangular inner parts 31 and two fixed, also triangular outer parts 32.
- Two movable outer parts 33 and two act with these movable inner parts 34 together. While the fixed parts 31 and 32 have flat smooth side surfaces, the movable parts 33 and 34 have longitudinal grooves in the surfaces facing the fixed parts 31 and 32, respectively, which cooperate with the flat surfaces of the fixed parts 31 and 32, respectively form closed guide channels 30 (Fig. 8a, 9a).
- FIG. 8a shows in the end view along the line VIII-VIII in FIG. 7 the reinforcement guide which approximately corresponds to the end view of the sleeper according to FIG. 3.
- FIG. 9 shows, in section along the line IX-IX in FIG. 7, an image roughly corresponding to the cross section of FIG. 4.
- Wire guide device 24 can be lowered in the direction of arrow 37 before the wires are tensioned and a new operation begins elsewhere.
- Fig. 10 still shows the arrangement of the grooves in the inner surface of the movable outer part 33 in a view along the line X-X in Fig. 7.
- the upper and lower guide channels serve to guide the parallel wires 30a and 30f;
- the middle guide channels serve to guide the crossing wires 30h and 30g on the left side of the outer part 33 and 30c and 30d on the right side.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Wire Processing (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Reinforcement Elements For Buildings (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4203895A DE4203895C2 (de) | 1992-02-11 | 1992-02-11 | Einrichtung zum Herstellen von Fertigbauteilen aus Spannbeton mit sofortigem Verbund, insbesondere von Spannbetonschwellen |
| DE4203895 | 1992-02-11 | ||
| PCT/EP1993/000289 WO1993015889A1 (de) | 1992-02-11 | 1993-02-08 | Verfahren zum herstellen von fertigbauteilen aus spannbeton mit sofortigem verbund, insbesondere von spannbetonschwellen, sowie einrichtung zum durchführen des verfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0579809A1 true EP0579809A1 (de) | 1994-01-26 |
| EP0579809B1 EP0579809B1 (de) | 1996-03-20 |
Family
ID=6451373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93903923A Expired - Lifetime EP0579809B1 (de) | 1992-02-11 | 1993-02-08 | Verfahren zum herstellen von fertigbauteilen aus spannbeton mit sofortigem verbund, insbesondere von spannbetonschwellen, sowie einrichtung zum durchführen des verfahrens |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5439629A (de) |
| EP (1) | EP0579809B1 (de) |
| AT (1) | ATE135621T1 (de) |
| BR (1) | BR9304206A (de) |
| CZ (1) | CZ282632B6 (de) |
| DE (2) | DE4203895C2 (de) |
| ES (1) | ES2086929T3 (de) |
| MX (1) | MX9300709A (de) |
| PL (1) | PL300807A1 (de) |
| SK (1) | SK109093A3 (de) |
| TR (1) | TR27146A (de) |
| TW (1) | TW232040B (de) |
| WO (1) | WO1993015889A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5747074A (en) * | 1995-02-02 | 1998-05-05 | Ollendick; David P. | Apparatus for the manufacturing of prestressed reinforced concrete railroad ties and the like |
| US5766648A (en) * | 1996-10-21 | 1998-06-16 | Cxt Incorporated | Road transportable segmental concrete railroad tie long-line production system |
| KR100243972B1 (ko) * | 1997-12-09 | 2000-02-01 | 허규태 | 침목 제조용 와이어 절단장치(Wire cutting apparatus for manufacturing sleeper) |
| ATE272164T1 (de) † | 2001-02-14 | 2004-08-15 | Boegl Max Bauunternehmung Gmbh | Verfahren und palette zur herstellung eines präzisen betonfertigteiles |
| SG93922A1 (en) * | 2001-06-07 | 2003-01-21 | Housing & Dev Board | Improved pre-stressed concrete formation |
| DE10254973A1 (de) * | 2002-11-26 | 2004-06-09 | Plica, Peter, Dr.-Ing. | Rahmenschwelle mit variabler Anzahl von Schienenbefestigungen und Verfahren zur Herstellung der Schwelle |
| DE102004019278B3 (de) * | 2004-04-21 | 2006-02-09 | Peter Dr.-Ing. Plica | Rahmenschwelle für einen Eisenbahnschotteroberbau |
| DE202009006555U1 (de) * | 2009-05-07 | 2009-07-16 | Rail.One Gmbh | Spannbetonschwelle |
| KR100950715B1 (ko) * | 2009-10-26 | 2010-03-31 | (주)대우건설 | 교량용 프리캐스트 코핑부의 시공 방법 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH238960A (de) * | 1942-11-12 | 1945-09-15 | Vogt Kurt | Verfahren zur Herstellung von vorgespannten Betonkörpern. |
| US2394227A (en) * | 1943-06-30 | 1946-02-05 | Dowsett Engineering Constructi | Production of prestressed reinforced concrete units |
| DE886425C (de) * | 1947-02-01 | 1953-08-13 | Adolf Kirchner | Verfahren und Einrichtung zum Vorspannen von Bewehrungsdraehten |
| GB712892A (en) * | 1949-05-25 | 1954-08-04 | Charles Bernard Mathews | Improvements in or relating to the casting of concrete units |
| GB977175A (en) * | 1964-02-11 | 1964-12-02 | Julian Lee Cone Junior | Apparatus for moulding pre-stressed concrete members |
| US4051216A (en) * | 1971-10-27 | 1977-09-27 | Concrete Industries (Monier) Limited | In-line moulding of prestressed concrete articles |
| US3827132A (en) * | 1971-11-11 | 1974-08-06 | Monier Concrete Ind | Prestressed rod laying means and method |
| GB1460149A (en) * | 1973-12-07 | 1976-12-31 | Dow Mac Concrete Ltd | Moulding reinforced concrete articles |
| CA1028129A (en) * | 1974-10-07 | 1978-03-21 | Concrete Industries (Monier) Limited | Concrete tie moulding method |
| US4186169A (en) * | 1976-10-21 | 1980-01-29 | Universal Development Company Limited | Process and apparatus for continuously prestressing concrete products |
| FR2385510A1 (fr) * | 1977-03-28 | 1978-10-27 | Costamagna & Cie B M | Perfectionnements a la fabrication de produits precontraints |
| SE408535B (sv) * | 1977-04-29 | 1979-06-18 | A Betong Ab | Sett att i en lang formbedd tillverka flera pa varandra foljande byggnadselement samt formbedd for utforande av settet |
| FR2498976A1 (fr) * | 1981-02-04 | 1982-08-06 | Borcoman Mircea | Methode, dispositifs, structures porteuses de moules et installations pour l'amelioration de l'efficacite des procedes pour la fabrication des produits en beton precontraint |
| FR2519898B1 (fr) * | 1982-01-21 | 1987-08-28 | Vagneux Traverses Beton Arme S | Ensemble de moulage d'elements en beton arme precontraint, notamment de traverses, et procede de fabrication de ces elements |
| IT1151920B (it) * | 1982-07-09 | 1986-12-24 | Betong Ab Sabema Material Ab A | Metodo per la produzione di blocchi per traversine in calcestruzzo e serie di matrici per realizzare tale metodo |
| DE3543369A1 (de) * | 1985-12-07 | 1987-06-11 | Trigon Bewehrungstechnik Vertr | Verfahren zum bewehren von vorgefertigten stahlbetonbauteilen sowie vorrichtung zur durchfuehrung des verfahrens |
| IT1206781B (it) * | 1987-04-29 | 1989-05-03 | Scac Spa | Impianto per la fabbricazione di manufatti lineari in cemento armato precompresso. |
| DE3832504A1 (de) * | 1988-09-24 | 1990-04-05 | Dyckerhoff & Widmann Ag | Eisenbahnschwelle aus spannbeton |
| DE3931201C1 (en) * | 1989-09-19 | 1990-11-22 | Wayss & Freytag Ag, 6000 Frankfurt, De | Concrete railway sleepers mfr. - uses moving frame mechanism which releases each sleeper immediately |
-
1992
- 1992-02-11 DE DE4203895A patent/DE4203895C2/de not_active Expired - Fee Related
-
1993
- 1993-02-08 SK SK1090-93A patent/SK109093A3/sk unknown
- 1993-02-08 DE DE59301937T patent/DE59301937D1/de not_active Expired - Fee Related
- 1993-02-08 AT AT93903923T patent/ATE135621T1/de not_active IP Right Cessation
- 1993-02-08 WO PCT/EP1993/000289 patent/WO1993015889A1/de not_active Ceased
- 1993-02-08 CZ CZ932139A patent/CZ282632B6/cs not_active IP Right Cessation
- 1993-02-08 PL PL93300807A patent/PL300807A1/xx unknown
- 1993-02-08 EP EP93903923A patent/EP0579809B1/de not_active Expired - Lifetime
- 1993-02-08 US US08/133,061 patent/US5439629A/en not_active Expired - Lifetime
- 1993-02-08 ES ES93903923T patent/ES2086929T3/es not_active Expired - Lifetime
- 1993-02-08 BR BR9304206A patent/BR9304206A/pt active Search and Examination
- 1993-02-10 TR TR00107/93A patent/TR27146A/xx unknown
- 1993-02-10 MX MX9300709A patent/MX9300709A/es not_active IP Right Cessation
- 1993-07-30 TW TW082106128A patent/TW232040B/zh active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9315889A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4203895A1 (de) | 1993-08-12 |
| WO1993015889A1 (de) | 1993-08-19 |
| CZ213993A3 (en) | 1994-05-18 |
| DE59301937D1 (de) | 1996-04-25 |
| SK109093A3 (en) | 1994-03-09 |
| MX9300709A (es) | 1993-12-01 |
| CZ282632B6 (cs) | 1997-08-13 |
| TW232040B (de) | 1994-10-11 |
| EP0579809B1 (de) | 1996-03-20 |
| US5439629A (en) | 1995-08-08 |
| BR9304206A (pt) | 1994-10-11 |
| ATE135621T1 (de) | 1996-04-15 |
| TR27146A (tr) | 1994-11-09 |
| ES2086929T3 (es) | 1996-07-01 |
| DE4203895C2 (de) | 1996-08-29 |
| PL300807A1 (en) | 1994-03-21 |
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