WO1991009693A1 - Blechband, verfahren und vorrichtung zum herstellen von gefalzten schraubennahtrohren - Google Patents
Blechband, verfahren und vorrichtung zum herstellen von gefalzten schraubennahtrohren Download PDFInfo
- Publication number
- WO1991009693A1 WO1991009693A1 PCT/EP1990/002082 EP9002082W WO9109693A1 WO 1991009693 A1 WO1991009693 A1 WO 1991009693A1 EP 9002082 W EP9002082 W EP 9002082W WO 9109693 A1 WO9109693 A1 WO 9109693A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- web
- sheet metal
- metal strip
- fold
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/121—Making tubes or metal hoses with helically arranged seams with seams being neither welded nor soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/126—Supply, or operations combined with supply, of strip material
Definitions
- Sheet metal strip Method and device for producing folded super-dovetail seams
- the invention relates to a sheet metal strip, a method and a device for the thornless winding of folded screw seam tubes, the sheet metal strip being provided with an edge web protruding from a bending edge, which enters a closable U-web on the second edge during winding until a contact edge is in contact.
- WO-A-89/05201 an attempt is made to compensate for the cross-sectional changes by means of an adjustable offset of the outer area of the sheet metal strip bearing the protruding edge web, the offset representing a step that jumps inwards in the tube, so that the circumferential length of the Edge strip bearing edge strip is smaller by the magnification error.
- This method is for both cylindrical as well as square tubes (with rounded edges) can be used.
- supporting rollers are provided in the interior of the winding that is formed, which contain pressure measuring cells.
- a reduction in the circumference increases the pressure on the rollers and an increase in the circumference reduces the pressure.
- the measured pressure values are compared with a desired value corresponding to the desired circumferential length and a middle bending roller is changed.
- the invention has now set itself the task of enabling the manufacture of folded tubes with a constant circumferential length without changes to the sheet metal strip itself.
- a sheet metal strip is used for this purpose, in which the protruding edge web has a crumple zone, the deformation of which allows the height of the edge web to be reduced.
- a method according to the invention in which the sheet metal strip is wound in such a way that the U-web of the incoming sheet metal strip slides onto the edge web of the last turn during winding and then the fold is closed, and the circumferential constancy of the winding that is produced is checked and in the event of an increase compared to the target value, a reducing corrective measure is initiated, provides that as a reducing corrective measure during the closing of the fold between the last turn and the incoming sheet metal strip is compressed at least the crumple zone of the edge web perpendicular to the sheet metal strip.
- the crumple zone can be in each at an edge web
- Sheet metal tape feasible way. It is thus conceivable, for example, to form a strict zone in the edge web by means of longitudinal slits or punchings and to extend it to a large initial height of the edge web. In the subsequent upsetting, the height of the edge web can then be reduced to a maximum of the original height.
- the crumple zone comprises at least one laterally bent area between the support edge and the bending edge of the edge web.
- the free leg of the U-web also has a crumple zone which can be deformed together with the crumple zone of the rim web.
- the crumple zone in the free leg of the U-web can also be formed in any way. If, for example, an expanded metal-like zone is also provided here, the regions of the edge web and the free leg that have burrs and edges hang when the U-web is closed. A fold formed in this way can also be folded over in a conventional manner.
- the crumple zone of the free leg of the U-web is preferably also formed by a bent region, the two bent regions lying one inside the other when the fold closes.
- the crumple zone is compressed to the desired or required extent in order to reduce the height of the edge web. This is preferably achieved by at least pressing the edge region of the last turn close to the fold relative to the incoming sheet metal strip.
- the ring shoulder of the closing roller lying in the edge region of the last turn is, as has been shown, only necessary for closing the fold, but not for the installation of the last turn of the tube, which presses against the counter pressure body, so that it presses against it Adjustment dimension can have the appropriate distance.
- the adjustment of the pressure surface therefore presses the last indication towards the closing roller, while the position of the incoming sheet metal strip remains unchanged and the height of the edge web lying with its contact edge in the U-web is reduced.
- the fold that closes in the process prevents springback when leaving the fold-closing device, so that the formed step is retained.
- the element of the counterpressure body pressing against the edge region of the last turn has a rotatable sleeve and a plurality of rolling rollers mounted in the sleeve, the spacings of which differ from the axis of the sleeve.
- the sleeve can thus be rotated from the outside without any problems, and the maximum eccentricity of the pressure surface can be achieved, for example, after a rotation of approximately 90 °.
- the rolling rollers reduce the friction.
- the element pressing against the edge region of the last turn has a rotatable ring with an eccentric outer surface and a pressure body which is guided against the eccentric outer surface and is radially displaceably guided.
- the pressure body could also be formed by a roller in this embodiment and the angular range of the eccentric pressure surface is limited to a few degrees.
- the sleeve or the ring can be rotated, for example, by means of a servomotor.
- F g. 1 an oblique view of a flat sheet metal strip, ig. 2 to 5 the folding of a first embodiment of the longitudinal edges of the sheet metal strip, FIG. 2 the two webs immediately before their union, FIG. 3 the open fold, FIG. 4 the closed fold without upsetting the crease zone and FIG. 5 the closed one Fold represents at maximum compression.
- 6 to 8 the interlocking of a second embodiment in the positions according to FIGS. 2, 4 and 5,
- FIG. 9 to 11 show the interlocking of a third embodiment in the positions according to FIGS. 2, 4 and 5
- FIG. 12 shows a schematic axial section through a few tube windings with a thread closing device
- FIG. 13 is relevant to the invention Part of a first embodiment of the fold closing device in an enlarged view
- FIG. 14 shows a section along the line XIV-XIV of FIG. 13
- FIG. 15 shows a section along the line XV-XV of FIG. 14, FIG. 16 14 in a position rotated by approximately 90
- FIG. 17 shows a section similar to FIG. 15 through a second
- a sheet metal strip 1 according to FIG. 1 is provided on one longitudinal edge with an edge web 2 and on the other longitudinal edge with a U-web 11, which, as can be seen from FIG. 12, interlock when winding a tube and form a union 20 represent.
- the edge web 2 is provided on the free edge of the winding 1 ′ that is being formed, onto which the U-web 11 of the incoming sheet metal strip 1 slides.
- the fold 20 is closed in the winding device, which consists of the fold-closing roller 24, the body 28 and a bending tool, not shown, during winding. The bending tool is involved in the manufacture of round tubes
- FIG. 12 also shows in a greatly exaggerated representation that ge ickelte tubes 21 expand. This can be counteracted by forming steps between the turns 1 ', the height a of which can be varied. Suitable fold web designs are shown enlarged in FIGS. 2 to 11.
- each edge web 2 has a first section 8, which extends essentially perpendicularly from the bending edge 3 and to which an approximately fourth curved section 6 extends up to lower edge 5 connects.
- a further section 9 extends from the lower edge 5 essentially parallel to section 8 and merges into a second curved area 7, which leads obliquely upwards to the first section 8.
- the height of the edge web 2 to the lower edge 5 is denoted by h.
- the individual sections and regions of the edge web 2 thus enclose an inner cavity 10.
- the U-web 11 has a first leg 14, which extends essentially vertically from the bending edge 18 and is adjoined by a transverse central region 13.
- the support of the last turn 1 'by the locking ring 27 is not necessary, since the U-web 11 rests in the groove 30 and the lower edge 5 of the edge web 2 is supported on the center Iberei ch 13 of the U-web 11.
- the locking ring 27 serves to push the end section 16 of the free leg 12 inwards, so that it engages behind the section 9 and the obliquely curved region 7 of the edge web 2. Since the height h of the edge web 2 remains unchanged, there is no deformation of the crumple zones 4 and 17.
- the last turn 1 ' is pressed downwards by the dimension a, that is, with respect to the tube axis 22, so that it is on the smaller one Lock ring 27 rests.
- the step corresponding to dimension a is formed, by which the incoming sheet metal strip 1 is displaced inwards with respect to the pipe axis 22 (FIG. 12), so that smaller turns are formed.
- the crumple zones 4 and 17 are now deformed, that is to say the first section 8 of the edge web 2 is pressed down until it rests on the middle 13, the first curved region 6 is bent more strongly and into the cavity 10 Folded in partially, the second curved area 7 is bent down parallel to the turn 1 'and the end section 16 of the U-web 11, which is also bent down parallel, is clamped between the area 7 and the turn 1'.
- the bending area 15 of the free leg 12 is more curved and pressed against the locking ring 27.
- the edge web 2 has a bent region 6 following the bending edge 3, which is enclosed by the crumple zone 4. This is followed by a section 8, which ends in the lower edge 5 lying in the U-web 11 and is not deformed.
- the U-web 11 in turn has a first leg 14 which extends substantially perpendicular to the sheet metal strip 1 and merges obliquely downwards into an upwardly angled center Ibere i ch 13, in the bending region of which the edge 5 of the edge web 2 - lies.
- the second, free leg 12 has a bent-out area 15, from which the end section 16 extends obliquely upwards. The bent region 15 and the end section 16 together form the crumple zone 17 of the free leg 12.
- edge web 2 has a section 9 which is bent back obliquely upwards from the edge 5, so that the two approximately V-shaped sections 8 and 9 form an enlarged contact or support surface in the U-web 11 (FIGS. 10, 11), and an improved hold of the edge web 2 in the U-web 11, especially in FIG not reduced height h (Fig. 10) is achieved.
- the bent-back section 9 has approximately the same height as the section 8, so that, according to FIG. 11, the region 6 rests on the free end of the section 9 in the approach to the bending edge 3 in the case of maximally crushed crumple zones 4, 17.
- the fold web shapes described are based on the mostly present requirement that a flush winding in any case leads to an enlargement of the tube, so that only reductions are necessary. In circumstances that cannot be determined exactly, a flush winding can also lead to a pipe downsizing, which can be corrected by a reverse step training. In this case, too, the sheet metal strip described can be used if it is consciously assumed that the circumferential length is too large, which is reduced to the desired circumferential length in the case of a machine-related reduction, and in the event of changes which do not achieve this dimension corresponding compression of the edge web 2 is carried out.
- a sheet metal strip 1 is also possible possible, on which the first leg 14 of the U-web 11 is shortened, so that with a not reduced height h a flush starting position according to FIG. 4, 7 or 10 cannot be achieved, but an opposite step is formed between the two metal strips , in which the winding 1 'is offset upwards or closer to the tube axis 22.
- the crumple zones 4, 17 are then already slightly deformed for the flush winding.
- the compression of the crumple zone 4, 7 and thus the change in the height h can be set to any intermediate value that results from the changes in the circumferential length checked at least once per turn 1 ′.
- the inner counter pressure body 28 has a pressure surface which can be changed at a distance from the smaller locking ring 27 of the locking roller 24.
- the counterpressure body 28 comprises a fixed bearing axis 29, which extends approximately over the last two turns 1 ', and a sleeve 23 rotatable on the bearing axis 29, in which rolling bodies forming the pressure surface form over a circumferential area of approximately 90 25 are mounted, the distance to the axis 29 increases.
- an actuator not shown
- FIG. 14 shows a roundest shape without the roll body 25 projecting, in which position the fold 20 is closed according to the representations according to FIGS. 4, 7 and 10 with flush inner winding surfaces.
- the maximum rotation of the sleeve 23 by 90 ° is shown in FIG. 16.
- the steps corresponding to the maximum dimension a arise on the inside of the tube, the closure of the fold 20 following the representations according to FIGS. 5, 5, 8 and 11.
- the sleeve 23 has bores on the end face into which the rolling elements 25 are loosely inserted.
- a securing sleeve 33 which axially fixes the rolling elements 25, is pushed onto the bearing axis 29 and is preferably freely rotatable on the bearing axis 29.
- the counter-pressure body 28 in turn comprises a bearing axis 29 on which a sleeve 23 is rotatably mounted.
- the sleeve 23 is connected to a ring 35 of smaller diameter, the outer surface 31 of which is eccentric with respect to the bearing axis 29, as can be seen above all from FIG. 18.
- the ring 35 which is smaller in diameter, extends within the securing sleeve 33, which in this embodiment is fixedly connected to the bearing axis 29 and has a radial guide slot 34.
- a pressure body 32 in particular a roller, is mounted so as to be radially displaceable, which cooperates with the eccentric outer surface 31 of the ring 35.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI914081A FI914081A7 (fi) | 1990-01-02 | 1990-12-04 | Levynauha, menetelmä ja laitteisto kierresaumattujen putkien valmistam iseksi |
| NO91913099A NO913099L (no) | 1990-01-02 | 1991-08-08 | Platebaand, fremgangsmaate og innretning for fremstilling av falsede skruesoemroer. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT190A AT394815B (de) | 1990-01-02 | 1990-01-02 | Blechband, verfahren und vorrichtung zum herstellen von gefalzten schraubennahtrohren |
| ATA1/90 | 1990-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1991009693A1 true WO1991009693A1 (de) | 1991-07-11 |
Family
ID=3479040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1990/002082 Ceased WO1991009693A1 (de) | 1990-01-02 | 1990-12-04 | Blechband, verfahren und vorrichtung zum herstellen von gefalzten schraubennahtrohren |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0461231A1 (de) |
| JP (1) | JPH04505889A (de) |
| AT (1) | AT394815B (de) |
| CA (1) | CA2047747A1 (de) |
| WO (1) | WO1991009693A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007669A1 (en) * | 1990-10-29 | 1992-05-14 | Bubb, Antony, John, Allen | Improvements in and relating to the formation of helically wound lock-seam tubing |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES1025697Y (es) * | 1993-09-09 | 1994-07-16 | Campillo Jose Rodriguez | Sistema de agrafado compensador del arquero en envases metalicos. |
| EP2138560B2 (de) | 2008-06-24 | 2015-04-01 | Cognis IP Management GmbH | Reinigungsmittel enthaltend Pfropfcopolymere |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3595046A (en) * | 1966-12-21 | 1971-07-27 | Malkki Eino | Method and device for manufacturing helically seamed tube |
| US3621884A (en) * | 1968-10-17 | 1971-11-23 | Johns Manville | Helically wound tubing |
| US3865146A (en) * | 1974-03-22 | 1975-02-11 | Johns Manville | Helically wound tubing and method of forming the same |
| GB1599379A (en) * | 1978-05-31 | 1981-09-30 | Spiro Investment Sa | Tube-forming machines |
| EP0222285A2 (de) * | 1985-11-13 | 1987-05-20 | Fritz Hahn GmbH & Co. KG | Verfahren und Vorrichtung zum Herstellen eines Wellrohres durch schraubenlinienförmiges Wickeln eines gewellten, dünnen Bandes vorzugsweise eines Stahlbandes |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA883780A (en) * | 1970-10-09 | 1971-10-19 | Spir-L-Ok Industries Limited | Apparatus for and the method of, making spiral seamed laminated sheet metal pipe |
| DE2127750C3 (de) * | 1971-06-04 | 1981-04-09 | Westaflex-Werk L. u. F. Westerbarkey GmbH & Co, 4830 Gütersloh | Doppelrohr |
| AT316283B (de) * | 1972-02-21 | 1974-07-10 | Schwarz Walter | Verfahren und Vorrichtung zum Herstellen von Rohren |
| US3940962A (en) * | 1974-05-09 | 1976-03-02 | Pacific Roller Die Company, Incorporated | Conduit making machine with diameter control and method |
-
1990
- 1990-01-02 AT AT190A patent/AT394815B/de not_active IP Right Cessation
- 1990-12-04 EP EP19910901529 patent/EP0461231A1/de not_active Withdrawn
- 1990-12-04 CA CA 2047747 patent/CA2047747A1/en not_active Abandoned
- 1990-12-04 JP JP3501817A patent/JPH04505889A/ja active Pending
- 1990-12-04 WO PCT/EP1990/002082 patent/WO1991009693A1/de not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3595046A (en) * | 1966-12-21 | 1971-07-27 | Malkki Eino | Method and device for manufacturing helically seamed tube |
| US3621884A (en) * | 1968-10-17 | 1971-11-23 | Johns Manville | Helically wound tubing |
| US3865146A (en) * | 1974-03-22 | 1975-02-11 | Johns Manville | Helically wound tubing and method of forming the same |
| GB1599379A (en) * | 1978-05-31 | 1981-09-30 | Spiro Investment Sa | Tube-forming machines |
| EP0222285A2 (de) * | 1985-11-13 | 1987-05-20 | Fritz Hahn GmbH & Co. KG | Verfahren und Vorrichtung zum Herstellen eines Wellrohres durch schraubenlinienförmiges Wickeln eines gewellten, dünnen Bandes vorzugsweise eines Stahlbandes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007669A1 (en) * | 1990-10-29 | 1992-05-14 | Bubb, Antony, John, Allen | Improvements in and relating to the formation of helically wound lock-seam tubing |
Also Published As
| Publication number | Publication date |
|---|---|
| AT394815B (de) | 1992-06-25 |
| EP0461231A1 (de) | 1991-12-18 |
| ATA190A (de) | 1991-12-15 |
| JPH04505889A (ja) | 1992-10-15 |
| CA2047747A1 (en) | 1991-07-03 |
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