EP0560091A1 - Procédé et dispositif pour dresser des poutrelles de section H - Google Patents
Procédé et dispositif pour dresser des poutrelles de section H Download PDFInfo
- Publication number
- EP0560091A1 EP0560091A1 EP93102497A EP93102497A EP0560091A1 EP 0560091 A1 EP0560091 A1 EP 0560091A1 EP 93102497 A EP93102497 A EP 93102497A EP 93102497 A EP93102497 A EP 93102497A EP 0560091 A1 EP0560091 A1 EP 0560091A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- straightening
- rollers
- carrier profile
- profile
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000011156 evaluation Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
- B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0071—Levelling the rolled product
Definitions
- the invention relates to a method and a device for straightening especially heavy, large, H-shaped support profiles between vertically movable tools arranged above and below the guideline.
- Heavy profiles or beams are usually straightened by bending the crooked areas. First of all, this presupposes visual detection of an existing curvature. The profile is then bent in a suitable straightening machine between three punches against the curvature until it disappears, i.e. the profile is straight. When operating the straightening machines used for this purpose, the operating personnel determine the use of the stamp and the stamp stroke based on their experience.
- the invention has for its object to provide a method and an apparatus with which the aforementioned disadvantages can be avoided and the straightening of heavy, large, H-shaped support profiles can be achieved in continuous operation.
- straightening rollers set to the height of the carrier profile support the carrier profile via the outer flange surfaces and that straightening rollers engaging right and left in the chambers of the carrier profile are set against the inner flange surfaces.
- the support profile is curved over the web - bend up or down - the thickness of the flange, which is too short, is reduced and lengthened with the rollers surrounding it at the top or bottom.
- the carrier profile is curved over the flange - bend to the left or to the right - then by adjusting the associated chamber rollers, the left or right upper and lower flange parts can be extended until the curvature is eliminated.
- the flange regions to be deformed, the degree of rolling and the position of the rollers can be determined from the measurement data and thus a fully continuous production process can be promoted.
- a straightening roller set can have rollers with different bale lengths, which are positioned against the flanges of the carrier profile. It is recommended to use a straightening roller set with at least three vertically adjustable roller pairs, of which one roller pair has a larger bale length of its rollers than the other roller pairs and supports the carrier profile with an upper and a lower roller over the outer flange surface, while the roller pairs with the shorter bale lengths on the right and are arranged on the left in the chambers of the carrier profile and lie against the inner flange surfaces of the carrier profile.
- the rollers lying on the outside which have the longer bale length, support the carrier at the top and bottom, and the roller pairs with the smaller bale lengths of their rollers which engage in the chambers of the carrier profile from both sides are between the upper and lower long rollers.
- the camera rollers are separated from each other by the profile web, which they also do not touch, and only have contact with the inner flange surfaces or with parts thereof.
- the two rollers arranged in a chamber of the carrier profile form a pair of rollers.
- roller pairs or their rollers can be arranged in a wide variety of variations, for large support profiles preferably one above the other in an alignment. If the chamber dimensions require a more compact design of the straightening roller set or the arrangement of the straightening rollers in the case of smaller carrier profiles, the upper and the lower roller can be offset and vertically aligned with the adjacent rollers of the roller pairs with the shorter bale lengths.
- the rollers of the roller pairs with the shorter bale lengths can be arranged to overlap one another in the vertical plane and in this case are moved out of the axis of symmetry of the carrier profile or the guideline.
- An arrangement with chamber rollers overlapping one another in the vertical plane allows at least two lower or upper rollers and at least one upper or lower roller with rollers of short bale length assigned to them to form a straightening roller set.
- At least one curvature sensor is connected upstream of the straightening roll set and is preferably connected to a roll adjustment via an evaluation unit, the rolls to be used for straightening by reducing the thickness of the flanges can be adjusted according to the measured values before the curvature runs in.
- the upper and lower rollers 8, 9 of the pair of rollers 5 have a larger bale length 11 than the right and left of the profile web 12 in the chambers 4 of the carrier profile 2 arranged chamber rollers 13, 14 and 15, 16 of the left of the profile web 12 and Right pair of rollers 6 and 7.
- the bale length 17 of the chamber rollers 13 to 16 is designed such that these rollers end at a short distance in front of the profile web 12, ie do not touch it.
- rollers 8, 9 of the roller pair 5 having a larger bale length 11 are used adjusted to the height of the support profile 2; they support the carrier profile 2 from above and below via the outer flange surfaces.
- the roller pairs 6, 7 with the chamber rollers 13, 14 and 15, 16 having the shorter bale lengths 17 engage left and right in the chambers 4 of the carrier profile; they are only in contact with the inner flange surfaces of the carrier profile 2.
- the straightening roller set 1 is preceded by a curvature sensor 18 and electrically connected to an evaluation unit 21 connected to the roller position 19.
- Measurement data obtained by the curvature sensors 18 about the state of curvature of the carrier profile 2 is fed into the evaluation unit 21, which determines the flange regions to be deformed and the level of the degree of rolling, and gives corresponding actuating signals to the roller positions 19, which accordingly actuate those chamber rollers against the inner flange surfaces that are required are together with the upper and lower rollers 8, 9 to reduce the thickness of the flange 3 of the carrier profile 2, which is shorter due to a curvature, and thus to extend it until the curvature is eliminated.
- the upper and lower rollers 108 and 109 are offset from one another and vertically in alignment with the chamber rollers 113 and 114 or 115 and 116 adjacent to them - the latter two are on the other side of the profile web and are not visible in the figure - arranged.
- the chamber rollers 113 and 114 - and accordingly the chamber rollers 115, 116 (not shown) - also overlap in the vertical plane, ie they are shifted up and down out of the longitudinal symmetry axis of the carrier profile 102, which coincides with the guideline 22.
- sufficiently thick straightening rollers can be arranged in the chambers 104 and 204 due to the horizontal and vertical offset of the rollers.
- the embodiment variant of the straightening roller set 201 shown in FIG. 4 differs from the roller arrangement according to FIG. 3 only by a roller group arranged downstream in the direction of passage 24 of the carrier profile 202, consisting of a further roller with a large bale length 11, which extends from below to the outer flange surface of the Carrier profile 202 creates, and in both chambers 204 right and left next to the profile web engaging chamber rollers 26 which are assigned to the roller 25.
- the profile 202 is stretched alternately on the lower flange 27 and on the upper flange 28 as it passes through the roller groups. This stretch becomes absolutely smaller from roll group to roll group. In this way, a favorable residual voltage can be achieved. Further roller groups 25/26 can alternately follow on the upper flange 28 and lower flange 27 in order to further reduce the residual tension.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4207297 | 1992-03-07 | ||
DE4207297A DE4207297A1 (de) | 1992-03-07 | 1992-03-07 | Verfahren und vorrichtung zum richten von h-foermigen traegerprofilen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0560091A1 true EP0560091A1 (fr) | 1993-09-15 |
Family
ID=6453503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93102497A Withdrawn EP0560091A1 (fr) | 1992-03-07 | 1993-02-18 | Procédé et dispositif pour dresser des poutrelles de section H |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0560091A1 (fr) |
JP (1) | JPH06106244A (fr) |
KR (1) | KR930019287A (fr) |
CN (1) | CN1076146A (fr) |
CA (1) | CA2091108A1 (fr) |
DE (1) | DE4207297A1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103599968A (zh) * | 2013-12-06 | 2014-02-26 | 攀钢集团攀枝花钢钒有限公司 | 工字钢矫直辊结构 |
CN104014617A (zh) * | 2014-05-29 | 2014-09-03 | 安徽新荣钢构有限公司 | 一种h型钢矫正装置 |
CN106670265A (zh) * | 2016-12-29 | 2017-05-17 | 沈阳中辰钢结构工程有限公司 | 一种小截面h型钢翼缘板焊接变形压力机矫正工装 |
CN107234148A (zh) * | 2017-06-30 | 2017-10-10 | 天津市中重科技工程有限公司 | 一种型钢矫直机机架 |
EP3269462A4 (fr) * | 2015-04-27 | 2018-06-06 | Mitsubishi Heavy Industries, Ltd. | Dispositif de laminage |
CN109513793A (zh) * | 2018-12-29 | 2019-03-26 | 西南铝业(集团)有限责任公司 | 一种槽型型材拉伸工艺及拉伸矫直设备和垫块 |
CN114043010A (zh) * | 2021-12-14 | 2022-02-15 | 广东汇景钢结构有限公司 | 一种特大异型钢构件的矫正补焊装置及其加工方法 |
CN114472604A (zh) * | 2022-04-07 | 2022-05-13 | 四川华川机械技术有限公司 | 一种h型钢材矫直装置 |
DE102020215582A1 (de) | 2020-12-09 | 2022-06-09 | Sms Group Gmbh | Beibiegeeinrichtung |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10329525B4 (de) * | 2003-06-30 | 2006-02-09 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Verfahren und Vorrichtung zum Richten eines warmen Profils sowie Verfahren zum Herstellen eines normgerechten Profils |
CN100448557C (zh) * | 2006-10-14 | 2009-01-07 | 马鞍山钢铁股份有限公司 | H型钢立式轧制方法及装置 |
US9522418B2 (en) | 2011-05-13 | 2016-12-20 | Mannstaedt Gmbh | Method and device for producing metal profiles having a closely toleranced chamber dimension |
JP5854037B2 (ja) * | 2013-03-27 | 2016-02-09 | Jfeスチール株式会社 | 形鋼の曲がり矯正方法 |
JP5854036B2 (ja) * | 2013-03-27 | 2016-02-09 | Jfeスチール株式会社 | 形鋼の曲がり矯正方法 |
EP3412370A4 (fr) * | 2016-04-28 | 2019-10-23 | Nippon Steel Corporation | Procédé de fabrication d'un produit en acier en forme de h |
CN106040788B (zh) * | 2016-08-01 | 2018-08-10 | 珠海东方重工有限公司 | 卧式矫正机 |
KR102371596B1 (ko) | 2016-12-16 | 2022-03-07 | 현대자동차주식회사 | 차량용 멤버 교정장치 및 교정방법 |
CN107186000B (zh) * | 2017-05-22 | 2018-12-11 | 成都飞机工业(集团)有限责任公司 | 一种针对零件变形的校正方法 |
CN109317527A (zh) * | 2017-07-31 | 2019-02-12 | 钱宏毅 | 一种制造隧道专用的弧形铝形材的装置 |
CN110090862A (zh) * | 2018-01-30 | 2019-08-06 | 高明铁企业股份有限公司 | 滑轨滚轧机之成型模具组 |
CN108526251B (zh) * | 2018-05-08 | 2019-10-18 | 广西盛畅物流有限公司 | 一种工字钢生产工艺 |
CN109226351B (zh) * | 2018-09-06 | 2023-11-24 | 泰安华鲁锻压机床有限公司 | 一种全自动h型钢卧式矫正机 |
JP7088149B2 (ja) * | 2019-08-30 | 2022-06-21 | Jfeスチール株式会社 | 曲がりの矯正方法及び矯正装置 |
CN110560515A (zh) * | 2019-10-11 | 2019-12-13 | 江苏亚太轻合金科技股份有限公司 | 一种h型材整形装置 |
CN111672938B (zh) * | 2020-06-02 | 2021-11-05 | 马鞍山钢铁股份有限公司 | 一种型钢腹板弯曲矫正工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189019A (ja) * | 1983-04-08 | 1984-10-26 | Sumitomo Metal Ind Ltd | 形鋼の矯正方法 |
DE3322777A1 (de) * | 1983-06-24 | 1985-01-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Verfahren zum richtenden umformen, insbesondere biegerichten und/oder torsionsrichten, von werkstuecken |
JPS63140703A (ja) * | 1986-12-03 | 1988-06-13 | Sumitomo Metal Ind Ltd | 極薄ウエブh形鋼の製造方法 |
JPH02127901A (ja) * | 1988-03-30 | 1990-05-16 | Sumitomo Metal Ind Ltd | 薄肉ウェブh形鋼の製造方法 |
-
1992
- 1992-03-07 DE DE4207297A patent/DE4207297A1/de not_active Withdrawn
-
1993
- 1993-02-18 EP EP93102497A patent/EP0560091A1/fr not_active Withdrawn
- 1993-03-04 KR KR1019930003183A patent/KR930019287A/ko not_active Application Discontinuation
- 1993-03-05 CA CA002091108A patent/CA2091108A1/fr not_active Abandoned
- 1993-03-05 JP JP5045398A patent/JPH06106244A/ja active Pending
- 1993-03-06 CN CN93102408A patent/CN1076146A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59189019A (ja) * | 1983-04-08 | 1984-10-26 | Sumitomo Metal Ind Ltd | 形鋼の矯正方法 |
DE3322777A1 (de) * | 1983-06-24 | 1985-01-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Verfahren zum richtenden umformen, insbesondere biegerichten und/oder torsionsrichten, von werkstuecken |
JPS63140703A (ja) * | 1986-12-03 | 1988-06-13 | Sumitomo Metal Ind Ltd | 極薄ウエブh形鋼の製造方法 |
JPH02127901A (ja) * | 1988-03-30 | 1990-05-16 | Sumitomo Metal Ind Ltd | 薄肉ウェブh形鋼の製造方法 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 12, no. 392 (M-755)(3239) 19. Oktober 1988 & JP-A-63 140 703 ( SUMITOMO METAL IND LTD ) 13. Juni 1988 * |
PATENT ABSTRACTS OF JAPAN vol. 14, no. 361 (M-1006)(4304) 6. August 1990 & JP-A-02 127 901 ( SUMITOMO METAL IND LTD ) 16. Mai 1990 * |
PATENT ABSTRACTS OF JAPAN vol. 9, no. 51 (M-361)(1774) 6. März 1985 & JP-A-59 189 019 ( SUMITOMO KINZOKU KOGYO K.K. ) 26. Oktober 1984 * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103599968A (zh) * | 2013-12-06 | 2014-02-26 | 攀钢集团攀枝花钢钒有限公司 | 工字钢矫直辊结构 |
CN103599968B (zh) * | 2013-12-06 | 2016-08-17 | 攀钢集团攀枝花钢钒有限公司 | 工字钢矫直辊结构 |
CN104014617A (zh) * | 2014-05-29 | 2014-09-03 | 安徽新荣钢构有限公司 | 一种h型钢矫正装置 |
CN104014617B (zh) * | 2014-05-29 | 2016-03-09 | 安徽新荣钢构有限公司 | 一种h型钢矫正装置 |
EP3269462A4 (fr) * | 2015-04-27 | 2018-06-06 | Mitsubishi Heavy Industries, Ltd. | Dispositif de laminage |
US10940515B2 (en) | 2015-04-27 | 2021-03-09 | Mitsubishi Heavy Industries, Ltd. | Milling apparatus |
CN106670265A (zh) * | 2016-12-29 | 2017-05-17 | 沈阳中辰钢结构工程有限公司 | 一种小截面h型钢翼缘板焊接变形压力机矫正工装 |
CN107234148A (zh) * | 2017-06-30 | 2017-10-10 | 天津市中重科技工程有限公司 | 一种型钢矫直机机架 |
CN109513793A (zh) * | 2018-12-29 | 2019-03-26 | 西南铝业(集团)有限责任公司 | 一种槽型型材拉伸工艺及拉伸矫直设备和垫块 |
CN109513793B (zh) * | 2018-12-29 | 2023-05-23 | 西南铝业(集团)有限责任公司 | 一种槽型型材拉伸工艺及拉伸矫直设备 |
DE102020215582A1 (de) | 2020-12-09 | 2022-06-09 | Sms Group Gmbh | Beibiegeeinrichtung |
CN114043010A (zh) * | 2021-12-14 | 2022-02-15 | 广东汇景钢结构有限公司 | 一种特大异型钢构件的矫正补焊装置及其加工方法 |
CN114043010B (zh) * | 2021-12-14 | 2022-10-04 | 广东汇景钢结构有限公司 | 一种特大异型钢构件的矫正补焊装置及其加工方法 |
CN114472604A (zh) * | 2022-04-07 | 2022-05-13 | 四川华川机械技术有限公司 | 一种h型钢材矫直装置 |
CN114472604B (zh) * | 2022-04-07 | 2022-06-24 | 四川华川机械技术有限公司 | 一种h型钢材矫直装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH06106244A (ja) | 1994-04-19 |
CA2091108A1 (fr) | 1993-09-08 |
DE4207297A1 (de) | 1993-09-09 |
KR930019287A (ko) | 1993-10-18 |
CN1076146A (zh) | 1993-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0560091A1 (fr) | Procédé et dispositif pour dresser des poutrelles de section H | |
EP1944570B1 (fr) | Procédé destiné à la mesure de la linéarité de produits allongés | |
DE69710610T2 (de) | Vorrichtung zum rollformen von blechformpfetten oder ähnlichem aus metallplatten | |
DE3519382A1 (de) | Walzenbiegevorrichtung | |
DE102005022052A1 (de) | Verfahren und Vorrichtung zum Richten länglicher Werkstücke | |
DE3885019T2 (de) | Verfahren und Vorrichtung zum Richten eines metallischen Bandes. | |
DE19839614B4 (de) | Metallbandbiegerollverfahren zur Herstellung eines elektrisch zu schweißenden Rohres aus einem flachen Metallband | |
DE19901187C2 (de) | Vorrichtung zum kontinuierlichen Walzen eines Blechbandes zu einem Profil mit im Querschnitt geraden Profilschenkeln, insbesondere zum Herstellen eines längsgeschweißten Rechteckrohres | |
EP1641575B1 (fr) | Procede permettant de redresser des profiles chauds | |
DE10153144C1 (de) | Vorrichtung zur Herstellung eines Rohres | |
DE3805364A1 (de) | Fertigwalzverfahren fuer profile | |
DE102005022043B3 (de) | Verfahren und Vorrichtung zum Richten eines länglichen Werkstückes | |
DE3422998C2 (fr) | ||
EP4217125B1 (fr) | Dispositif et procédé de laminage d'une bande métallique | |
DE19725726C2 (de) | Verfahren zur Planheitsmessung von Bändern, insbesondere Metallbändern | |
DE1452114A1 (de) | Fuehrungsvorrichtung fuer Bandwalzwerke | |
AT397624B (de) | Vorrichtung zum biegen von kanten | |
DE4226402A1 (de) | Verfahren zur Herstellung von langen dickwandigen Rohren durch Biegen aus einer Metallplatte und Vorrichtung zur Ausführung des Verfahrens | |
EP0234204A2 (fr) | Procédé et dispositif pour dresser un rail du chemin de fer dans une dresseuse à rouleaux | |
DE3400608C2 (de) | Walzgerüst mit einer zwischen Arbeitswalze und Stützwalze eingefügten versetzten Zwischenwalze | |
DE2902827C2 (de) | Schrägwalzenrichtmaschine für Rohre | |
DE102020117682A1 (de) | Richtmaschine und Verfahren zum Richten eines Metallbandes oder eines flächigen Metallteils | |
DE19613878C1 (de) | Kalander für Papier o. dgl. | |
DE2456782A1 (de) | Verfahren und vorrichtung zum richten von profilstahl | |
DE3245031A1 (de) | Walzgeruest |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19930308 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE ES FR GB IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19940215 |