EP0299005A1 - Supporting bar for a board. - Google Patents
Supporting bar for a board.Info
- Publication number
- EP0299005A1 EP0299005A1 EP88900538A EP88900538A EP0299005A1 EP 0299005 A1 EP0299005 A1 EP 0299005A1 EP 88900538 A EP88900538 A EP 88900538A EP 88900538 A EP88900538 A EP 88900538A EP 0299005 A1 EP0299005 A1 EP 0299005A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- connecting part
- support rod
- shaft rod
- longitudinal
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 77
- 239000002184 metal Substances 0.000 claims abstract description 77
- 238000003466 welding Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 19
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 claims description 13
- 239000011358 absorbing material Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000009941 weaving Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0608—Construction of frame parts
- D03C9/0616—Horizontal upper or lower rods
- D03C9/0625—Composition or used material
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0608—Construction of frame parts
- D03C9/0616—Horizontal upper or lower rods
- D03C9/0633—Heald bars or their connection to other frame parts
Definitions
- the invention relates to a support rod for a heald frame consisting of a shaft rod and an associated Li tzentragschi ene.
- the supporting rods of which two each connected by ten Gap form a frame called a heald frame, consist of a hollow profile made of light metal.
- the Li tzentragschi ene is integrally connected to the cross-sectionally rectangular hollow profile of the shaft rod via an elongated side wall of this hollow profile.
- the one-piece support rod can be produced as a drawn profile.
- the object on which the invention is based was therefore to produce a support rod for heald frames from steel, which is very suitable in terms of properties such as flexural strength, machinability, etc., but in a lightweight construction which, in terms of weight, is one in comparison with a support rod made of light metal 1 professional 1 leads to a more favorable result and can also be realized with comparable manufacturing costs in relation to the end product.
- the support rod has the features of claim 1. It therefore essentially consists only of flat sheet metal sections, which guarantees that a support rod several meters long and produced by joining sheet metal sections does not warp.
- very thin sheets are used, which means the use of a high-speed one Device for assembling allowed, whereby it is expedient to work with laser welding.
- the wall-forming sheet metal sections of the longitudinal narrow sides of the shaft rod preferably have a material thickness that is several times greater than that of the sheet metal sections of the longitudinal broad sides of the shaft rod, which are welded to the former.
- Fig. 1-8 and 12 different embodiments of a support rod in the vertical cut and shown graphically and broken.
- FIG. 9,10 and 11 different embodiments of the support rod according to FIG. 8 in the vertical cut.
- the support rod for a heald frame shown in FIG. 1 has a shaft rod 1 forming a hollow body and a connecting part 2 adjoining its lower end and a lithium support rail 3 arranged on the latter.
- the structure of the supporting rod thus corresponds to that of a conventional light metal professional 1 rod.
- the support rod according to the invention forms a welded structure made of flat sheet metal sections of different materials, each forming a wall, the sheet metal sections extending over the entire length of the support rod.
- the shaft rod 1 is assembled from a U-shaped sheet metal section 4 forming the upper longitudinal narrow side and a sheet metal section 5 forming a longitudinal broad side at the front, further a sheet metal section 6 forming a longitudinal broad side at the rear, and from the lower Longitudinal narrow sheet metal sections 7 and 8 with a much larger material Strength.
- the 1-shaped sheet-metal section 8 simultaneously forms the upper longitudinal narrow side of the connecting part 2, which is also formed as a flat sheet-metal section of the hollow body, which is considerably narrower than the shaft rod 1
- Hollow bodies are the sheet metal sections 9 and 10, which form the broad sides and have a very small wall thickness, are welded to the lei-shaped sheet section 8 and also welded to a 1 egg-shaped body 11 at the lower end.
- the sheet metal section 9 of very low materi al thickness is also still welded to the sheet metal section 7 forming the narrow side and at the lower edge of the connecting part to a lei stenformi sheet section 12 which, like the 1 egg-shaped sheet section 11, is substantially larger Materi al strength than the sheet metal sections 9 and 10 forming the broad sides.
- All the sheet metal sections 4, 7, 8, 11 and 12 forming the longitudinal narrow sides which have a greater material strength, provide the flexural rigidity of the supporting rod and the possibility that the sheet metal sections 5, 6, 9 and 10 can be welded with a much lower material thickness, this material strength also being significantly lower than the material thickness of the corresponding wall sections in a conventional light metal 1 supporting rod. In comparison with the latter, the lower weight of the support rod according to the invention is also achieved in the end result.
- the heddle support rail 3 is welded. This consists of a Blechabschni t 13 and a welded to the upper edge of the lei-shaped sheet section 14.
- the heddle support rail can also have a different shape or dimension, depending on the weaving system. All sheet metal sections are joined by means of laser welding on the long broad sides. Four weld connecting lines 15 are shown in dashed lines on the front side visible in the drawing. In a corresponding manner, the welding is also carried out on the back.
- a corrosion-resistant sheet with a small wall thickness of approx. 0.25 mm is used for the sheet for the production of the support rod.
- the material thickness of the sheet metal sections on the longitudinal narrow sides, which is several times greater, is approximately 1 mm to 1.5 mm, i.e. the multiple value of the thin sheet sections.
- This construction allows the production of very long supporting bars with a high bending strength and with a weight that is less than an equally long supporting bar made of a conventional light metal 1-section.
- a material 16 is introduced into the cavity of the shaft rod 1, which fills the cavity as a sound-absorbing foam material and with the function of a support and holding body for the sheet metal sections forming the broad sides prevents their bulging outwards as well as inwards.
- This material which holds and supports the sheet metal sections on the broad sides, makes it possible to use sheet metal sections with an extremely small wall thickness.
- the embodiment according to FIG. 2 differs from the embodiment according to FIG. 1 only in one detail at the connection point between the shaft rod 1 and the connecting part 2.
- the sheet metal section 7 forming the longitudinal narrow side has a recess 16 in a lower longitudinal edge into which the connection ⁇ part 2 is inserted with its upper longitudinal narrow side 8. "," -, "/ 05837 '
- the parts of the support rod consisting of shaft rod 1 and connecting part 2 can be welded together even better from box-shaped structures previously produced separately.
- FIG. 3 The longitudinal narrow side of the shaft rod 1 is formed here by a cross section Z-shaped profile 17, of which one leg forms the upper longitudinal narrow side of the hollow body-shaped connecting part 2, on which leg the sheet metal sections 9 and 10 are welded.
- the profile 17 is also arranged such that the part of the profile 17 connecting the two legs runs obliquely upwards at an angle of approximately 6 ° so that it extends into the shaft rod 1 from below, not shown in the drawing Strive screws for example for holding elements of means or the like are more accessible.
- the heddle support rail 3 prevents the actuation of such screws when they extend vertically upwards into the shaft rod.
- the connecting part 2 can also be designed to taper downwards, so that in this embodiment the two sheet metal sections 9 and 10 are welded directly to one another at the bottom.
- the lower longitudinal narrow side of the shaft rod 1 can be formed by a U-profile 18 in a further modification.
- the connecting part 2 with the two sheet metal sections 9 and 10 is welded.
- the other leg of the U-profile creates on the front a so-called retaining lug 19 for attaching plug-on guides, retaining elements or drive elements which are fastened by reaching around the shaft rod, as is also known in the case of conventional supporting rods made of metal 1 profi 1.
- a retaining lug 20 can also be formed on the lower edge of the connecting part 2 by appropriate dimensioning of the lower 1 egg-shaped longitudinal narrow side 11 of the connecting part.
- FIG. 6 it is also possible to reduce the number of sheet metal sections forming the support rod by using a multi-angled, one-piece sheet metal section 21 for the front of the support rod, which thus thus covers the two longitudinal narrow sides of the shaft rod 1 and the broad side of the shaft rod as well as the front broad side of the connecting part 2 comprises.
- the reinforcement to achieve the bending rigidity is provided by a welded-on U-profile 22 placed on top.
- the modified embodiment according to FIG. 6 can also be designed on the rear so that the shaft rod 1 and the connecting part 2 have a flat sheet metal section 23, which extends in one piece over the entire height of the support rod, as a common longitudinal broad side. This rear side, which extends in one piece over the entire support rod, can also be used in the previously described embodiments according to FIGS. 1 to 5.
- the deviation from the embodiment according to FIG. 1 is that an inverted U-profile with the two legs pointing upwards is arranged on the upper longitudinal narrow side.
- the longitudinal channel between these legs is filled with fiber composite material, in particular a material 24 containing carbon fibers, which is five times lighter than steel. You can achieve a very high flexural rigidity with this material and you can choose a U-profile that is even smaller in wall thickness.
- a longitudinal channel is formed between the connecting part 2 and the heddle support rail 3 by appropriate design of the profile strip 25 connecting these two parts, which is filled with fiber composite material 26.
- recesses 27 are formed in the connecting part 2 at regular longitudinal distances from one another in the support rod according to FIG. 8, which in addition to reducing the weight have the function of preventing dust from collecting between the heddle support rail and the connecting part .
- These cutouts 27 can expediently be present in all the embodiments according to FIGS. 1 to 7.
- the recesses are also known for the support rods made ofcht etal 1 - profile. With the configuration of the support rod from individual sheet metal sections described here, the cutouts 27 can be produced in different ways.
- the cross sections through the support rod according to FIGS. 9, 10 and 11 show three different embodiments of the recess which are produced in different ways. According to FIG.
- the rear sheet metal section 10 is deformed by deep drawing, so that it bears against the front sheet metal section 9 around the cutout edge. Then the two sheet metal sections are connected to one another by laser welding. The edge of the recess is then finished. 10, the cutout 27 is produced in such a way that first the front and the back sheet metal sections 9 and 10 are punched out and that the back sheet metal section 10 is placed on a mandrel (not shown in the drawing) with one of the size of the cutout appropriate cross-section is placed and then a cover 28 in the form of a tire is placed on this mandrel. The front sheet metal section is then connected
- Another method consists in the space between the front sheet metal section 9 and the rear sheet metal section in the case of a support rod according to FIG. 11
- a glass fiber reinforced hard foam in the form of a plate with a recess formed therein can be inserted between the two sheet metal sections at this point.
- the connecting part 2 is produced from a one-piece strip-shaped sheet metal section which has a substantially greater material thickness than the sheet metal sections 5 and 6 of the longitudinal broad sides of the hollow body-shaped shaft rod 1.
- This connecting part 2 is the longitudinal narrow side of the shaft rod 1 forming sheet metal section 7, with the laser weld seam simultaneously forming the broad side of the shaft bar sheet metal section 6 on the connecting part 2 and this being welded onto the sheet metal section 7, which is done with laser welding and because of the small amount Strengthening materi al is possible.
- the connecting part 2 is connected to the stranded rail 3 which extends in parallel by means of a profile rod 12 inserted between the latter and the connecting part by means of welding.
- the number of sheet metal parts to be welded is also reduced compared to the previously described embodiments.
- a thin rubber-elastic intermediate layer 30 is further arranged between the longitudinal broad sides 5 and 6 of the shaft rod, which are made of sheet metal, and the sound-absorbing material 16 filling the cavity, which is adhesively bonded to the sheet metal and also to the sound-absorbing material.
- This intermediate layer which is only about 0.3 mm thick, prevents the core, which is preferably made of rigid foam, from tearing at its boundary layer with the sheet metal as a result of the very high stress caused by the rapid up and down movement of the supporting rod.
- this intermediate layer also additionally has a sound-insulating effect.
- This rubber-elastic intermediate layer 30 can of course be provided in all the previously described embodiments according to FIGS. 1-11. 77
- the above-described support rod made of sheet metal sections joined together has, apart from the already mentioned advantages of the high level of flexure resistance and the comparatively favorable weight, a further advantage over a support rod made of light metal 1 profi 1.
- threaded bushes can be welded on the inside of the upper longitudinal narrow part at the respectively required location, for example to fasten the drive plate for the heald frame.
- Lei chtmetal 1 support bars are sufficient in the transverse dimension, small threaded bushings at the precisely measured point, which in turn contributes to a reduction in the overall weight.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Rod-Shaped Construction Members (AREA)
- Body Structure For Vehicles (AREA)
- Laser Beam Processing (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
La barre de support est constituée par une lamette (1) formée d'un corps creux et d'une partie de liaison (2) fermant son côté étroit, pour le maintien de la tringle porte-lisses (3) disposée à son extrémité. Ces parties constitutives de la barre de support sont formées de pièces en tôle plate en acier (4-14) fixées entre elles par soudure. Les côtés longitudinaux larges (5, 6, 9, 10) sont formés de pièces de tôle relativement mince et sont soudés aux côtés longitudinaux étroits (4, 7, 8, 11, 12) formés de pièces de tôle d'épaisseur notablement plus grande. L'utilisation du soudage par laser permet une technique de fabrication précise et une grande production. La barre de support ainsi obtenue est de faible poids et présente une grande résistance à la flexion. Ses caractéristiques concernant la résistance aux contraintes de flexion alternées sont nettement meilleures que celles de la barre de support fabriquée par un profilé en métal léger.The support bar consists of a strip (1) formed of a hollow body and a connecting part (2) closing its narrow side, for holding the heald rod (3) arranged at its end. These constituent parts of the support bar are formed from pieces of flat steel sheet (4-14) fixed together by welding. The wide longitudinal sides (5, 6, 9, 10) are formed from relatively thin pieces of sheet metal and are welded to the narrow longitudinal sides (4, 7, 8, 11, 12) formed from pieces of significantly thicker sheet metal . The use of laser welding allows a precise manufacturing technique and a large production. The support bar thus obtained is light in weight and has a high resistance to bending. Its characteristics concerning resistance to alternating bending stresses are clearly better than those of the support bar produced by a light metal profile.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873702524 DE3702524A1 (en) | 1987-01-28 | 1987-01-28 | SUPPORT FOR A WEBSHAFT |
DE3702524 | 1987-01-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0299005A1 true EP0299005A1 (en) | 1989-01-18 |
EP0299005B1 EP0299005B1 (en) | 1993-02-03 |
Family
ID=6319721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88900538A Expired - Lifetime EP0299005B1 (en) | 1987-01-28 | 1988-01-11 | Supporting bar for a board |
Country Status (8)
Country | Link |
---|---|
US (1) | US4901767A (en) |
EP (1) | EP0299005B1 (en) |
JP (1) | JP2593707B2 (en) |
KR (1) | KR910008041B1 (en) |
CN (1) | CN1017912B (en) |
DE (2) | DE3702524A1 (en) |
SU (1) | SU1701116A3 (en) |
WO (1) | WO1988005837A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1239916B (en) * | 1990-05-15 | 1993-11-23 | Elio Carrara | LICCIRUOLO FOR LICCI PAINTINGS IN COMPOSITE MATERIALS |
DE4023498C1 (en) * | 1990-07-24 | 1991-10-24 | Grob & Co Ag, Horgen, Zuerich, Ch | |
DE4038384A1 (en) * | 1990-12-01 | 1992-06-04 | Grob & Co Ag | WEBSHAFT WITH SOLVABLE CORNER CONNECTIONS |
DE4101512C1 (en) * | 1991-01-19 | 1992-02-06 | Grob & Co Ag, Horgen, Zuerich, Ch | |
EP0504104A1 (en) * | 1991-03-14 | 1992-09-16 | Gebrüder Sulzer Aktiengesellschaft | Heddle frame slat and heddle frame for a loom |
EP0504102A1 (en) * | 1991-03-14 | 1992-09-16 | Gebrüder Sulzer Aktiengesellschaft | Heddle frame slat and heddle frame for a loom |
EP0504101A1 (en) * | 1991-03-14 | 1992-09-16 | Gebrüder Sulzer Aktiengesellschaft | Heddle frame slat and heddle frame for a loom |
JP3162255B2 (en) * | 1994-02-24 | 2001-04-25 | 三菱電機株式会社 | Laser processing method and apparatus |
DE29604326U1 (en) * | 1996-01-13 | 1996-06-05 | Schmeing Gmbh & Co | Heald frame with heddle support rail for weaving machines |
IT1318130B1 (en) * | 2000-07-06 | 2003-07-23 | Nuova O M V S R L | MULTI-COMPONENT CROSSBAR FOR FRAME HOLDERS WITH REDUCED NOISE OF WEAVING FRAMES. |
BE1015131A5 (en) * | 2002-10-04 | 2004-10-05 | Wiele Michel Van De Nv | Method for manufacturing component consists of a whole. |
DE10319959B4 (en) * | 2003-05-02 | 2007-02-01 | Groz-Beckert Kg | Weave for a loom |
DE10325908B4 (en) * | 2003-06-05 | 2005-07-21 | Groz-Beckert Kg | Shaft rod, heald frame and method for producing a shaft rod |
DE10326123B4 (en) * | 2003-06-06 | 2007-01-04 | Groz-Beckert Kg | Shaft rod, manufacturing process for this and weave shank |
FR2857987B1 (en) * | 2003-07-21 | 2005-10-07 | Staubli Sa Ets | FRAME OF LISSES AND WEAVING EQUIPPED WITH AT LEAST ONE SUCH FRAMEWORK |
DE10349382B3 (en) * | 2003-10-21 | 2005-06-09 | Groz-Beckert Kg | Weave in composite construction |
DE102004055381B3 (en) * | 2004-11-17 | 2006-04-06 | Groz-Beckert Kg | Shaft rod for heald frames |
DE102004059319A1 (en) * | 2004-12-02 | 2006-06-08 | Picanol N.V. | heald |
DE102005044474B3 (en) | 2005-09-16 | 2007-01-04 | Groz-Beckert Kg | Shaft rod for a power loom, comprises a hollow profile with at least one oblong recess in the narrow side which tapers off at the ends and into which a reinforcing element is adhesively bonded |
EP1975293B1 (en) * | 2007-03-26 | 2012-01-25 | Groz-Beckert KG | Heald bar made of sheet metal |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH525352A (en) * | 1968-09-13 | 1972-07-15 | Contraves Ag | Rod with high flexural rigidity and use of the same |
BE817535A (en) * | 1973-11-16 | 1974-11-04 | SUPPORT FOR EDGING WEAVING BLADES | |
JPS50118057A (en) * | 1974-03-06 | 1975-09-16 | ||
CH601533A5 (en) * | 1976-04-08 | 1978-07-14 | Sulzer Ag | |
CH610993A5 (en) * | 1976-06-08 | 1979-05-15 | Sulzer Ag | |
CH637702A5 (en) * | 1979-07-13 | 1983-08-15 | Grob & Co Ag | WEBSITE. |
US4484604A (en) * | 1983-09-06 | 1984-11-27 | Steel Heddle Mfg. Co. | Composite dual-face heddle frame slat |
US4633916A (en) * | 1985-06-24 | 1987-01-06 | Rast John L | Roll-formed shear-resistant frame slat |
US4706717A (en) * | 1986-08-25 | 1987-11-17 | Steel Heddle Manufacturing Co., Inc. | Heddle frame for a high speed weaving machine |
JP3123823B2 (en) * | 1992-07-28 | 2001-01-15 | ニッコー株式会社 | Method for manufacturing substrate for thermal head |
-
1987
- 1987-01-28 DE DE19873702524 patent/DE3702524A1/en active Granted
-
1988
- 1988-01-11 JP JP63501123A patent/JP2593707B2/en not_active Expired - Fee Related
- 1988-01-11 KR KR1019880701210A patent/KR910008041B1/en not_active IP Right Cessation
- 1988-01-11 WO PCT/CH1988/000007 patent/WO1988005837A1/en active IP Right Grant
- 1988-01-11 EP EP88900538A patent/EP0299005B1/en not_active Expired - Lifetime
- 1988-01-11 US US07/264,949 patent/US4901767A/en not_active Expired - Lifetime
- 1988-01-11 DE DE8888900538T patent/DE3878059D1/en not_active Expired - Fee Related
- 1988-01-28 CN CN88100331A patent/CN1017912B/en not_active Expired
- 1988-09-27 SU SU884356619A patent/SU1701116A3/en active
Non-Patent Citations (1)
Title |
---|
See references of WO8805837A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR910008041B1 (en) | 1991-10-07 |
JP2593707B2 (en) | 1997-03-26 |
DE3702524A1 (en) | 1988-08-11 |
CN88100331A (en) | 1988-08-31 |
JPH01502682A (en) | 1989-09-14 |
WO1988005837A1 (en) | 1988-08-11 |
SU1701116A3 (en) | 1991-12-23 |
DE3878059D1 (en) | 1993-03-18 |
US4901767A (en) | 1990-02-20 |
CN1017912B (en) | 1992-08-19 |
EP0299005B1 (en) | 1993-02-03 |
DE3702524C2 (en) | 1989-06-08 |
KR890700701A (en) | 1989-04-26 |
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Legal Events
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