EP0754510B1 - Transferanlage mit Dreiachsentransfer - Google Patents
Transferanlage mit Dreiachsentransfer Download PDFInfo
- Publication number
- EP0754510B1 EP0754510B1 EP96111147A EP96111147A EP0754510B1 EP 0754510 B1 EP0754510 B1 EP 0754510B1 EP 96111147 A EP96111147 A EP 96111147A EP 96111147 A EP96111147 A EP 96111147A EP 0754510 B1 EP0754510 B1 EP 0754510B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive unit
- gripper rails
- gripper
- transfer system
- transverse
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
- B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars
Definitions
- the invention relates to a transfer system with the Features of the preamble of claim 1.
- workpieces are made in stages go through several processing steps, one after the other clocked by several processing stations. These are placed one behind the other along a transport direction and perform special edits on the corresponding one Workpiece.
- the transfer system For transporting the workpieces from one processing station to the next one the transfer system has a transfer device on the workpieces from processing station to processing station transported on.
- For this transportation i.e. for gripping a workpiece, leading it out from a processing station, transport to next subsequent processing station, inserting of the workpiece in this processing station and that Separating the transfer device from the workpiece needed a certain amount of time. This is in the determination the total time to be taken into account for that Workpiece is required. In other words, it determines resulting transport time for the workpiece a cycle sequence, which should be as fast as possible to a high To allow ejection of the transfer system.
- DE-43 10 057 A1 describes a device for Transfer of workpieces through a series of processing stations known by the device with each other are linked.
- the device is a three-axis transfer trained and has two parallel at a distance mutually held gripper rails. These are with Equipped with the gripper means to be transported Workpieces can be brought into and out of engagement.
- the gripper rails are in a horizontal plane arranged.
- the gripper rails are above linear guides suspended on vertically adjustable cross members.
- the linear guides allow longitudinal movement of the Gripper rails, whereby to drive the gripper rails in Electrical transport drive units mounted in the longitudinal direction are provided.
- These as linear drives Trained drive units are for decoupling regarding the respective height of the gripper rails Coupling rods connected to the gripper rails.
- the transfer system points to the drive of their two mutually parallel gripper rails in three from each other independent axes three separate, preferably electrically operated drive units. These are the transport drive unit, the lift drive unit and the cross drive unit. All drive units are stored independently of one another, so that none of the Drive units accelerated or braked as a whole must become. During a transport cycle, only the Gripper rails and any existing holding devices, such as cross members or the like, accelerated and braked, but not the drive units.
- the cross drive unit is the gripper rails temporarily separable from the gripper rails.
- the coupling means each contain two translational movements transmitting coupling halves. With the Gripper rails only remain connected to the coupling halves, which have a low mass. The total mass the moving parts is thereby compared to the state of the Technology significantly reduced, which is an increase in Working speed of the transfer device allows.
- the height of the with respect to the stroke direction Parts connected to gripper rails is small, which is the other way around a particularly large stroke in the vertical or stroke direction enables.
- the gripper rails can be raised particularly far, which makes the tool change by moving the sliding tables out to the side simply designed.
- the Gripper rails in connection with a braking device, which blocks them in the transverse direction when the gripper rails are separated from the cross drive unit.
- the Transition from the release position to the clamping or blocking position is preferably done at or shortly before Separate the coupling halves so that the gripper rails keep a distance from each other during their movement, the same as that set by the cross drive unit Distance is.
- the braking device can be both a clamping device as well as a locking or locking device his.
- a clamping device has advantages if an infinitely variable adjustability Distances between the gripper rail is desired, while a locking device or a locking device are advantageous if only two or a few Positions of the gripper rails must be determined.
- the braking device is preferably one Controlled sensor device that detects whether the gripper rails already coupled to the cross drive unit or are separated from it. This can be done through a Monitoring the distance of the gripper rails from the Cross drive unit can be accomplished.
- the sensor device can also use the coupling agent directly monitor.
- a simple version for the sensor device can be a feeler lever that when the Coupling halves pivoted together from their rest position is what he releases the braking device.
- the braking device can be used as a linear braking unit be trained in the one on its engaged position Too spring-loaded brake pad on one elongated braking surface and supported by the feeler lever Relieved of the spring force or the braking surface is lifted when the feeler lever is out of its rest position is swung out.
- the decoupling of the gripper rails from the cross beams with respect to the stroke direction can be from a linear guide be taken over.
- a linear guide for the transverse direction enables the gripper rails to be moved with respect to the cross member in the lateral direction.
- decoupling swing arm suspensions or similar are also possible, however, the linear guides allow a lower overall height. Both linear guides are through an intermediate piece connected. The coupling half assigned to the gripper rail is preferably provided on this intermediate piece.
- the coupling means couples the gripper rail a linear movement in the lateral direction to the Transverse drive unit and can, for example, by a Socket and a pin are formed, their respective Longitudinal direction transverse to the transverse direction of movement to be transmitted is aligned.
- a clutch is special easy to get in and out of engagement.
- the drive units can be mechanical Drive units, but it is advantageous if each driven by separate electric motors are. This allows the movement components in transport, Stroke and cross direction controlled separately from each other be what an easier setting and where appropriate Reprogramming of transfer curves enabled.
- the transfer system shown in Fig. 1 is one Transfer press 1, the four along a transport direction T arranged press stations 3, 4, 5, 6 as processing stations having. Press stations 3, 4, 5, 6 are each only schematically based on a cross Transport direction T running line indicated. To the Press stations 3, 4, 5, 6 do not belong accordingly Sub-tools shown on a common Sliding table 7 are arranged.
- the lower tools are, for example, matrices for forming sheet metal large workpieces.
- the sliding table 7 is mounted so that it is in the transverse direction Q are moved out of the machine frame can to the lower tools and the upper tools if necessary replace that detached from the plungers and on the lower tools are stored.
- the transverse direction is Q thereby a horizontal, perpendicular to the direction of transport T set direction.
- a transport drive unit 22 For moving the gripper rails 16, 17 in and against the transport direction T is a transport drive unit 22 provided that a drive unit 22a for the gripper rail 16 and a drive unit 22b for the Includes gripper rail 17.
- the drive units 22a, 22b are the same as the rest of the transfer unit 15 a longitudinal and vertical median plane symmetrical built up to each other.
- the drive unit 22a has an electric motor 25a, the rotation of which into a linear movement by means of a corresponding gear 26a is implemented.
- a coupling rod 27a is provided with the gripper rail 16, which a longitudinal movement in the transport direction T of transmits the transmission 26a to the transport rail 16 and both an adjustment of the gripper rail 16 in Transverse direction Q and in a stroke direction H enables.
- the coupling rods 27a, 27b can by Linear guides with vertical axis can be replaced, whereby the movements in the lifting and transport directions from each other be decoupled.
- the gripper rail 16 is over at a later point explained linear guides on two parallel at a distance held to each other and extending in the transverse direction Q
- Cross members 30, 31 mounted such that they both adjustable in the transport direction T and in the transverse direction Q. and in the stroke direction H to the cross member 30, 31 is bound. Accordingly, the gripper rail 17 is over Linear guides mounted on the cross beams 30, 31.
- a movement component synchronously around the gripper rails 16, 17 to be able to impress in stroke direction H are the cross members 30, 31 adjustable in height, to which Drive a hub drive unit 35 is provided.
- This contains a drive unit which is mounted on the corner pillars 19 in a stationary manner 35a with an electric motor 36a, which has a Gear means 37b acts on the cross member 30, as well as a Drive unit 35b.
- This has an electric motor 36b and a converting its rotary motion into a linear motion Gear means 37b on the electric motor 36b connects to the cross member 31.
- a transverse drive unit 40 To adjust the gripper rails 16, 17 to one another to and away from each other, i.e. in the transverse direction Q a transverse drive unit 40 is provided, the one Cross member 30 associated drive unit 40a and one Contains cross member 31 associated drive unit 40b. Both drive units 40a, 40b are essentially constructed the same, with an explanation of the details of the drive unit 40a with reference to FIG. 2.
- the spindle drive 46 has a pin provided as an output, which is oriented parallel to the pin 47 is.
- the pins run towards each other or away from each other.
- the pins 47 serve as coupling halves, the corresponding sockets 48 as complementary coupling halves assigned. That of the pin 47 and the bushings 48 coupling means formed each serve for coupling the gripper rails 16, 17 to a corresponding movement the pin 47 in and against the transverse direction Q.
- the coupling halves formed by the bushings 48 are firmly connected with spacers 50, 51, which over for example, linear guides 52 shown in FIG. 3 Cross direction Q slidably on the cross member 30. Via a linear guide arranged at right angles to it 53 is the gripper rail 16 with the intermediate piece 50 connected. A corresponding linear guide is between the intermediate piece 51 and the gripper rail 17 are provided.
- the intermediate piece 50 and the linear guide 52 are can be blocked by means of a corresponding braking device 55.
- This contains a brake shoe 57, which by means of a Compression spring 58 can be pressed against a braking surface 59 which with respect to the cross member 30 rests.
- the brake shoe 57 is however, connected to the movable intermediate piece 50.
- the brake device 55 also includes a feeler lever 61, which is pivotable at one end on the intermediate piece 50 is mounted and the spring force of the compression spring 58 transmits the brake shoes 57. With its free end protrudes the feeler lever 61 into the interior of the socket 48.
- the transfer press 1 described so far works as follows:
- the rams of the press stations, not shown 3, 4, 5, 6 give a work cycle of the transfer press 1 before, in which the workpieces by means of the transfer unit 15 to pass from press station to press station are.
- the transverse drive unit 40 moves the gripper rails 16, 17 towards each other, so that their grippers 20 with the workpieces come into engagement.
- the lifting drive unit 35 is activated, so that the gripper rails 16, 17 synchronously start lifting. Even before the sockets 48 are completely off Pins 47 are lifted, the feelers 61, each Coupling means are assigned to their rest position pivoted, in which they no longer rest on the pin 48 and the full force of the compression spring 58 on the respective Transfer brake shoes 57. The gripper rails 16, 17 are thereby locked in the transverse direction Q when the sockets are lifted off the pin 47.
- the lifting drive unit lowers 35 the cross beams 30, 31, whereby the bushings 48 again find on the pin 47.
- the pins 47 come in at the end with the feeler levers 61 System and thereby transfer the braking device 55 in Release position.
- the transverse drive unit 40 By actuating the transverse drive unit 40 the gripper rails 16, 17 are separated from one another, whereby the gripper means 20 into the corresponding Release tools of inserted workpieces.
- a transfer unit which is designed as a three-axis transfer unit is.
- the Transverse drive unit acts on coupling means the gripper rails, which is only a drive connection between the cross drive unit and the gripper rails manufacture if these have to be adjusted laterally. Otherwise the cross drive unit is from the gripper rails Cut. The one with the gripper rails up and down masses to be moved and the resulting acceleration forces are significant through this measure decreased. This enables shorter cycle times.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Specific Conveyance Elements (AREA)
- Multi-Process Working Machines And Systems (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
Description
Claims (16)
- Transferanlage (1) zur Bearbeitung von Werkstücken in entlang einer Transportrichtung (T) aufeinanderfolgenden Bearbeitungsstationen (3, 4, 5, 6),dadurch gekennzeichnet,mit einer zum Transport von Werkstücken von Bearbeitungsstation zu Bearbeitungsstation vorgesehenen Transfereinheit (15),die zwei im Abstand parallel zueinander gehaltene, in Transportrichtung (T) angeordnete Greiferschienen (16, 17) aufweist, die zur Durchführung einer Transferbewegung in Transportrichtung (T) sowie unter Beibehaltung ihres Abstandes rechtwinklig zu der Transportrichtung in Querrichtung (Q) verstellbar gelagert sind,die eine Transport-Antriebseinheit (22) für die Transportrichtung (T) enthält, mittels derer die Greiferschienen (16, 17) synchron zueinander in und entgegen der Transportrichtung (T) antreibbar sind,die eine Hub-Antriebseinheit (35) enthält, mittels derer die Greiferschienen (16, 17) mit konstantem Abstand zueinander rechtwinklig zu der Transportrichtung (T) in und entgegen einer Hubrichtung (H) antreibbar sind, unddie eine Quer-Antriebseinheit (40) enthält, mittels derer die Greiferschienen (16, 17) aufeinander zu und voneinander weg in Querrichtung (Q) antreibbar sind, wobeidie Greiferschienen (16, 17) Greifermittel (20) tragen, die mit den zu transportierenden Werkstücken in und außer Eingriff gebracht werden können,daß die Transport-Antriebseinheit (22), die Hub-Antriebseinheit (35) und die Quer-Antriebseinheit (40) jeweils ortsfest gelagert sind,daß zwischen der Quer-Antriebseinheit (40) und den Greiferschienen (16, 17) jeweils ein Kupplungsmittel (47, 48) vorgesehen ist unddaß die Quer-Antriebseinheit (40), die die Bewegung der Greiferschienen (16, 17) aufeinander zu und voneinander weg bewirkt, nur dann antriebsmäßig mit den Greiferschienen (16, 17) gekuppelt ist, wenn diese bezüglich der Hubrichtung (H) in einer festgelegten Stellung befindlich sind, und ansonsten von den Greiferschienen (16, 17) getrennt ist.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die festgelegte Stellung, bei der die Greiferschienen (16, 17) mit der Quer-Antriebseinheit (40) gekuppelt ist, eine untere Extremlage der Greiferschienen (16, 17) ist, in der diese in Bezug auf die Hubrichtung (H) weitestmöglich abgesenkt sind.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Greiferschienen (16, 17) mit einer Bremsvorrichtung (55) in Verbindung stehen, die deren Bewegung in Querrichtung (Q) unterbindet, wenn die Greiferschienen (16, 17) von der Quer-Antriebseinheit (40) getrennt sind.
- Transferanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Bremsvorrichtung (55) eine mittels eines Federmittels (58) auf ihre Blockierstellung zu vorgespannte Linearbremseinheit ist.
- Transferanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Bremsvorrichtung (55) eine Sensoreinrichtung (61) enthält, die den Abstand der Greiferschienen (16, 17) von der Quer-Antriebseinheit (40) erfaßt, die Bremsvorrichtung (55) löst, wenn der Abstand eine vorbestimmte Grenze unterschreitet und die Bremsvorrichtung (55) ansonsten aktiviert.
- Transferanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Bremsvorrichtung (55) eine Sensoreinrichtung (61) enthält, die die Kupplungsmittel (47, 48) überwacht und die Bremsvorrichtung (55) löst, wenn die Kupplungsmittel (47, 48) eingerückt sind, und die die Bremsvorrichtung (55) aktiviert, wenn die Kupplungsmittel (55, 56) getrennt sind.
- Transferanlage nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Sensoreinrichtung (61) ein Fühlhebel ist, der um eine bezüglich der Hubbewegung (H) an die Greiferschienen (16, 17) gebundene Achse schwenkbar gelagert ist und dessen freies Ende zur Betätigung der Bremsvorrichtung (55) mit einem bezüglich der Hubrichtung (H) ortsfesten Element (47) in Berührung kommen kann.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Greiferschienen (16, 17) auf wenigstens zwei im Abstand zueinander angeordneten höhenverstellbaren Querträgern (30, 31) angeordnet und bezüglich der Hubrichtung (H) fest an diese angekoppelt sind.
- Transferanlage nach Anspruch 8, dadurch gekennzeichnet, daß die Hub-Antriebseinheit (35) antriebsmäßig mit den höhenverstellbaren Querträgern (39, 31) verbunden ist.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Greiferschiene (16, 17) und dem Querträger (30, 31) eine Linearführung (52) angeordnet ist, deren Bewegungsrichtung oder -achse mit der Querrichtung (Q) übereinstimmt, und daß zwischen der Greiferschiene (16, 17) und dem Querträger (30, 31) eine weitere Linearführung (53) angeordnet ist, deren Bewegungsrichtung oder -achse mit der Transportrichtung (T) übereinstimmt.
- Transferanlage nach Anspruch 10, dadurch gekennzeichnet, daß das Kupplungsmittel (47, 48) eine erste Kupplungshälfte (48), die über die eine Längsbewegung in Transportrichtung (T) zulassende Linearführung (53) mit der Greiferschiene (16, 17) verbunden ist, und eine zweite Kupplungshälfte (47) aufweist, die mit der Quer-Antriebseinheit (40) verbunden ist.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Greiferschiene (16, 17) mit einer als Buchse ausgebildeten Kupplungshälfte (48) verbunden ist, deren Öffnung in der Hubrichtung (H) orientiert ist, und daß die Quer-Antriebseinrichtung (40) mit einer Kupplungshälfte (47) verbunden ist, die als mit geringem Spiel in die Buchse passender und sich in Hubrichtung (H) erstreckender Zapfen ausgebildet ist.
- Transferanlage nach Anspruch 7 und 12, dadurch gekennzeichnet, daß das Element (47) der Zapfen ist.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Hub-Antriebseinheit (35) eine elektrische Linearantriebseinheit ist.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Quer-Antriebseinheit (40) eine elektrische Linearantriebseinheit ist, die es, wenn die Greiferschienen (16, 17) mit der Quer-Antriebseinheit (40) gekuppelt sind, ermöglicht, die Greiferschienen (16, 17) aufeinander zu und voneinander weg synchron zu bewegen.
- Transferanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Transport-Antriebseinheit (22) jeweils mit den Greiferschienen (16, 17) verbundene Linearantriebseinheiten aufweist, mittels derer die Greiferschienen (16, 17) in Transportrichtung (T) unabhängig von der Stellung der Greiferschienen (16, 17) bezüglich der Quer- und der Hubrichtung (Q, H) synchron bewegbar sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19526490A DE19526490A1 (de) | 1995-07-20 | 1995-07-20 | Transferanlage mit Dreiachsentransfer |
| DE19526490 | 1995-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0754510A1 EP0754510A1 (de) | 1997-01-22 |
| EP0754510B1 true EP0754510B1 (de) | 2001-10-10 |
Family
ID=7767329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96111147A Expired - Lifetime EP0754510B1 (de) | 1995-07-20 | 1996-07-11 | Transferanlage mit Dreiachsentransfer |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5803231A (de) |
| EP (1) | EP0754510B1 (de) |
| CZ (1) | CZ212396A3 (de) |
| DE (2) | DE19526490A1 (de) |
| ES (1) | ES2164197T3 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19721613A1 (de) * | 1997-05-23 | 1998-11-26 | Schuler Pressen Gmbh & Co | Presse mit einer Umsetzeinrichtung für Werkstücke |
| DE10045401A1 (de) * | 2000-09-14 | 2002-03-28 | Kolbus Gmbh & Co Kg | Verfahren und Vorrichtung zum Überführen von Buchblocks in ein Transportmittel einer Buchbindemaschine |
| DE102004005046B4 (de) * | 2004-01-30 | 2008-01-24 | Müller Weingarten AG | Transportvorrichtung für Werkstücke in Pressen |
| DE102004007165A1 (de) * | 2004-02-12 | 2005-09-22 | Schuler Automation Gmbh & Co.Kg | Vorrichtung zum Transport von Werkstücken |
| DE102012110065A1 (de) * | 2012-10-22 | 2014-04-24 | Schuler Automation Gmbh & Co. Kg | Umformanlage |
| CN106364891B (zh) * | 2016-11-22 | 2018-07-27 | 芜湖航天特种电缆厂股份有限公司 | 轴承自动上料机的轴承出料组件 |
| CN106429374B (zh) * | 2016-11-22 | 2018-11-13 | 绍兴市上虞区永和镇鑫鹏轴承厂 | 轴承自动上料机的第一轴承送料装置 |
| CN111532752A (zh) * | 2020-04-15 | 2020-08-14 | 安徽巨一科技股份有限公司 | 一种同步带齿轮联动传动的移栽机构 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6010820B2 (ja) * | 1978-02-23 | 1985-03-20 | 株式会社小松製作所 | 三次元トランスフア装置 |
| JPS5855138A (ja) * | 1981-09-28 | 1983-04-01 | Sumitomo Heavy Ind Ltd | トランスフア−フイ−ド装置 |
| US4540087A (en) * | 1982-08-19 | 1985-09-10 | Kabushiki Kaisha Komatsu Seisakusho | Three-dimensional work transfer apparatus |
| JPH0618676B2 (ja) * | 1984-10-23 | 1994-03-16 | 株式会社小松製作所 | プレス用材料搬送装置 |
| JPS61283426A (ja) * | 1985-06-10 | 1986-12-13 | Intetsuku:Kk | プレス機械用トランスフア装置 |
| JP3090789B2 (ja) * | 1992-08-24 | 2000-09-25 | アイダエンジニアリング株式会社 | トランスファプレス |
| DE4309643C2 (de) * | 1993-03-25 | 2002-06-13 | Schuler Pressen Gmbh & Co | Umsetzeinrichtung für den Werkstücktransport |
| DE4310057A1 (de) * | 1993-03-27 | 1994-09-29 | Schuler Gmbh L | Vorrichtung zum Transfer von Werkstücken durch eine Folge von Bearbeitungsstationen |
| DE4331479A1 (de) * | 1993-09-16 | 1995-03-23 | Guenter Zierpka | Vorschubeinrichtung zum schrittweisen Material- und/oder Werkstücktransport an bzw. in intermittierend arbeitenden Produktionsmaschinen |
-
1995
- 1995-07-20 DE DE19526490A patent/DE19526490A1/de not_active Withdrawn
-
1996
- 1996-07-11 EP EP96111147A patent/EP0754510B1/de not_active Expired - Lifetime
- 1996-07-11 DE DE59607866T patent/DE59607866D1/de not_active Expired - Fee Related
- 1996-07-11 ES ES96111147T patent/ES2164197T3/es not_active Expired - Lifetime
- 1996-07-12 US US08/678,820 patent/US5803231A/en not_active Expired - Fee Related
- 1996-07-17 CZ CZ962123A patent/CZ212396A3/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CZ212396A3 (en) | 1997-09-17 |
| ES2164197T3 (es) | 2002-02-16 |
| EP0754510A1 (de) | 1997-01-22 |
| US5803231A (en) | 1998-09-08 |
| DE19526490A1 (de) | 1997-01-23 |
| DE59607866D1 (de) | 2001-11-15 |
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