EP0521244B1 - Weaving loom - Google Patents
Weaving loom Download PDFInfo
- Publication number
- EP0521244B1 EP0521244B1 EP92105253A EP92105253A EP0521244B1 EP 0521244 B1 EP0521244 B1 EP 0521244B1 EP 92105253 A EP92105253 A EP 92105253A EP 92105253 A EP92105253 A EP 92105253A EP 0521244 B1 EP0521244 B1 EP 0521244B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- weaving loom
- servomotor
- loom according
- mechanical weaving
- 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
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/60—Construction or operation of slay
Definitions
- the invention relates to a weaving machine, in particular for weaving screens, with a shutter drive, a shaft drive and a shooter drive.
- Such weaving machines are used for the production of fabrics of different widths and lengths.
- the productivity of these machines is largely determined by the number of blows. This cannot be increased arbitrarily, since sufficient time must be available for the insertion of the weft thread between the warp threads.
- dimensions result that are longer in the direction of the weft threads than in the direction of the warp threads. This does not have an impact on the dimensioning of the weaving machines, which must have weaving widths of more than 30 m for such applications.
- Sufficient time must be available for the weaving shop to insert these long weft threads during a working cycle. The maximum possible number of strokes is limited accordingly.
- the mass of the sley has to be moved, which also increases approximately proportionally with the width of the weave and thus additionally limits the possible number of blows.
- EP 0 321 974 A1 discloses a drive for a weaving machine for a weaving machine, with one by one Complementary curve drive toggle lever, which is articulated on the one hand on the machine frame and on the other hand on the loom support.
- the complementary curve drive imposes a non-uniform pendulum motion on the sley, which leaves more time for weft insertion during a work cycle.
- a disadvantage of the cam controls of the shutter drives is that when the number of impacts increases, the rollers tend to lift off the cam disc and, as a result of the inertia, disadvantageous backlashes occur.
- the object of the invention is to increase the productivity of a weaving machine.
- the shutter drive has a program-controlled servomotor, a self-locking gear being arranged between the servomotor and the shutter.
- a self-locking transmission is represented, for example, by the known cam drive.
- the entire cam drive can also be replaced by a worm gear with possibly further gear stages.
- the work cycles of the sley can be arbitrarily influenced by simple reprogramming.
- the sley can be driven symmetrically. Inertial twisting of the sley is avoided.
- the measures have the same purpose in that means for synchronizing the two drives and means for comparing the servomotor torques are provided. Overall, this improves the precision of the movements.
- the loom has sensors, which are preferably designed as absolute value decoders.
- the other movements such as those of the dobby and the shooter, can thus be locked with the weaving movement via the control and operational disruptions avoided.
- a further optimization of the motion sequences can be achieved if the shaft drive also has a servo motor.
- a drive is connected as a master drive.
- the deviations to be determined by the control as The difference between the setpoint and actual value for the generation of corresponding correcting actuating variables always takes place in relation to the master drive.
- the interface to the electronic control can be realized with less means if the servomotor is designed as an electrical servomotor.
- the servomotor is designed as a hydraulically driven servomotor, preferably with an axial piston pump.
- the axial piston pump has the advantage that a self-locking gear can be dispensed with.
- the object is also achieved in that a program-controlled servo motor is provided in a loom as a drive for a sley in connection with a self-locking gear.
- the weaving machine shown in FIG. 1 has a frame wall 1, a crankshaft 2, crank connecting rods 3, shop shooters 4, a weaving drawer 5 and a reed 6, through which the warp threads 7 are drawn in.
- the woven fabric 8 is exactly one of the three fabric trees 9a, 9b and 9c by a fabric tree regulator, not shown, for each working cycle of the weaving machine deducted the same piece constantly.
- a dobby also not shown, moves the heald frames 10a and 10b with the strands 11a and 11b, through the eyes of which the warp threads 7 run and thereby form the shed 12, into which the weft thread is inserted by a shooter, not shown.
- support element 13 is provided, via which the warp threads 7 coming from the warp beam 15 are guided.
- the warp beam 15 is mounted in bearings 19 and is driven by a motor, not shown.
- crankshaft 2 The drive for crankshaft 2 is shown schematically within the break line of frame wall 1.
- spur gear 14 is firmly connected, which meshes with pinion 16.
- Pinion 16 is in turn firmly connected to worm wheel 18, in which worm 20 engages.
- crankshaft 2 The position of the crankshaft 2 is removed via a gearwheel, not shown, which is arranged coaxially to the crankshaft 2 and is firmly connected to it.
- toothed belt 23 On this toothed wheel and a further toothed wheel 24, toothed belt 23 is applied in a meshing manner, to which mark 25 is fastened.
- the mark 25 is recognized by the sensor 26 and converted into a corresponding signal, which is forwarded to the control system, also not shown, via lines (not shown).
- the arrangement described is provided on both sides of the loom.
- One drive is connected as a master drive and the other as a slave drive.
- the even introduction of torque into the crankshaft is monitored by comparing the motor currents and, if necessary, readjusted by the control.
- the exact synchronization of the drives on both sides is made possible by the control with the aid of the signals from the sensors 26.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
Die Erfindung betrifft Webmaschine, insbesondere zum Weben von Sieben, mit einem Webladenantrieb, einem Schaftantrieb und einem Schützenantrieb.The invention relates to a weaving machine, in particular for weaving screens, with a shutter drive, a shaft drive and a shooter drive.
Derartige Webmaschinen werden zur Herstellung von Geweben unterschiedlicher Breite und Länge benutzt. Die Produktivität dieser Maschinen wird wesentlich von der Schlagzahl bestimmt. Diese läßt sich nicht beliebig erhöhen, da für den Eintrag des Schußfadens zwischen die Kettfäden ausreichend Zeit zur Verfügung stehen muß. Je nach Verwendungszweck des Gewebes ist es erforderlich, Kett- und Schußfäden dem beabsichtigten Verwendungszweck entsprechend auszurichten. Für gewebte Papiermaschinensiebe ergeben sich beispielsweise Abmessungen, die in Richtung der Schußfäden länger sind als in Richtung der Kettfäden. Dies bleibt nicht ohne Einfluß auf die Dimensionierung der Webmaschinen, die für derartige Anwendungsfälle teilweise Webbreiten von über 30m aufweisen müssen. Zum Eintrag dieser langen Schußfäden muß während eines Arbeitsspiels der Weblade ausreichend Zeit zur Verfügung stehen. Entsprechend wird die maximal mögliche Schlagzahl begrenzt. Darüber hinaus muß die Masse der Weblade bewegt werden, die ebenfalls mit der Webbreite etwa proportional wächst und somit zusätzlich die mögliche Schlagzahl begrenzt.Such weaving machines are used for the production of fabrics of different widths and lengths. The productivity of these machines is largely determined by the number of blows. This cannot be increased arbitrarily, since sufficient time must be available for the insertion of the weft thread between the warp threads. Depending on the intended use of the fabric, it is necessary to align warp and weft threads in accordance with the intended use. For woven paper machine screens, for example, dimensions result that are longer in the direction of the weft threads than in the direction of the warp threads. This does not have an impact on the dimensioning of the weaving machines, which must have weaving widths of more than 30 m for such applications. Sufficient time must be available for the weaving shop to insert these long weft threads during a working cycle. The maximum possible number of strokes is limited accordingly. In addition, the mass of the sley has to be moved, which also increases approximately proportionally with the width of the weave and thus additionally limits the possible number of blows.
Zur Erhöhung der Produktivität und Vermeidung der mit höheren Schlagzahlen verbundenen Nachteile ist durch EP 0 321 974 A1 ein Webladenantrieb für eine Webmaschine bekannt, mit einem durch ein Komplementärkurventrieb bewegten Kniehebel, der einerseits am Maschinenrahmen und andererseits an der Webladenstütze angelenkt ist. Durch den Komplementärkurventrieb wird der Weblade eine ungleichförmige Pendelbewegung aufgezwungen, die für den Schußfadeneintrag während eines Arbeitsspiels mehr Zeit läßt.To increase productivity and avoid the disadvantages associated with higher impact rates, EP 0 321 974 A1 discloses a drive for a weaving machine for a weaving machine, with one by one Complementary curve drive toggle lever, which is articulated on the one hand on the machine frame and on the other hand on the loom support. The complementary curve drive imposes a non-uniform pendulum motion on the sley, which leaves more time for weft insertion during a work cycle.
Nachteilig an den Kurvensteuerungen der Webladenantriebe ist, daß bei Erhöhung der Schlagzahl die Rollen zum Abheben von der Kurvenscheibe neigen und infolge der Massenträgheit dadurch nachteilige Umkehrspiele entstehen.A disadvantage of the cam controls of the shutter drives is that when the number of impacts increases, the rollers tend to lift off the cam disc and, as a result of the inertia, disadvantageous backlashes occur.
Andere bekannte Konstruktionen versuchen der Weblade durch Verwendung elliptischer Zahnräder oder speziell ausgebildeter Kurbeltriebe eine ungleichförmige Bewegung aufzuzwingen.Other known designs attempt to impose a non-uniform motion on the sley using elliptical gears or specially designed crank mechanisms.
Aufgabe der Erfindung ist es, die Produktivität einer Webmaschine zu erhöhen.The object of the invention is to increase the productivity of a weaving machine.
Diese Aufgabe wird dadurch gelöst, daß der Webladenantrieb einen programmgesteuerten Servomotor aufweist, wobei zwischen Servomotor und Weblade ein selbsthemmendes Getriebe angeordnet ist. Ein solches selbsthemmendes Getriebe stellt beispielsweise der bekannte Kurventrieb dar. Überraschenderweise hat sich gezeigt, daß durch Überlagerung der Geschwindigkeitssteuerung durch Kurventrieb mit zusätzlicher Steuerung durch einen Servomotor sich die mechanische Grenze der bisherigen Geschwindigkeitssteuerung bei Webladen überwinden lassen und damit höhere Schlagzahlen zu erzielen sind, was wiederum zu einer verbesserten Produktivität der Webmaschine führt.This object is achieved in that the shutter drive has a program-controlled servomotor, a self-locking gear being arranged between the servomotor and the shutter. Such a self-locking transmission is represented, for example, by the known cam drive. Surprisingly, it has been shown that by superimposing the speed control by means of a cam drive with additional control by a servo motor, the mechanical limit of the previous speed control in web shops can be overcome and higher impact rates can thus be achieved. which in turn leads to improved productivity of the weaving machine.
Überraschenderweise läßt sich aber auch der gesamte Kurventrieb durch ein Schneckengetriebe mit ggf. weiteren Getriebestufen ersetzen. Dadurch lassen sich in Verbindung mit der Programmsteuerung durch einfache Umprogrammierung willkürlich die Arbeitsspiele der Weblade beeinflussen.Surprisingly, however, the entire cam drive can also be replaced by a worm gear with possibly further gear stages. In connection with the program control, the work cycles of the sley can be arbitrarily influenced by simple reprogramming.
Dadurch, daß an beiden Enden der Weblade ein Antrieb vorgesehen ist, kann die Weblade symmetrisch angetrieben werden. Trägheitsbedingte Verwindungen der Weblade werden vermieden.Because a drive is provided at both ends of the sley, the sley can be driven symmetrically. Inertial twisting of the sley is avoided.
Denselben Zweck verfolgen die Maßnahmen, daß Mittel zur Synchronisierung der beiden Antriebe und Mittel zum Vergleich der Servomotormomente vorgesehen sind. Insgesamt wird die Präzision der Bewegungen dadurch verbessert.The measures have the same purpose in that means for synchronizing the two drives and means for comparing the servomotor torques are provided. Overall, this improves the precision of the movements.
Zur Überwachung der Webladenbewegung weist die Webmaschine Sensoren auf, die vorzugsweise als Absolutwertdekoder ausgebildet sind. Über die Steuerung lassen sich somit die anderen Bewegungen, wie die der Schaftmaschine und der Schützenschlag, mit der Webladenbewegung verriegeln und Betriebsstörungen vermeiden.To monitor the movement of the loom, the loom has sensors, which are preferably designed as absolute value decoders. The other movements, such as those of the dobby and the shooter, can thus be locked with the weaving movement via the control and operational disruptions avoided.
Eine weitere Optimierung der Bewegungsabläufe läßt sich erreichen, wenn auch der Schaftantrieb einen Servomotor aufweist.A further optimization of the motion sequences can be achieved if the shaft drive also has a servo motor.
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß ein Antrieb als Leitantrieb geschaltet ist. Die von der Steuerung zu ermittelnden Abweichungen als Differenz zwischen Soll- und Istwert zur Erzeugung entsprechender korrigierender Stellgrößen erfolgen immer in Bezug auf den Leitantrieb.In a further embodiment of the invention it is provided that a drive is connected as a master drive. The deviations to be determined by the control as The difference between the setpoint and actual value for the generation of corresponding correcting actuating variables always takes place in relation to the master drive.
Die Schnittstelle zur elektronischen Steuerung läßt sich mit geringeren Mitteln verwirklichen, wenn der Servomotor als elektrischer Servomotor ausgebildet ist.The interface to the electronic control can be realized with less means if the servomotor is designed as an electrical servomotor.
Alternativ ist möglich, daß der Servomotor als hydraulisch angetriebener Servomotor ausgebildet ist, vorzugsweise mit einer Axialkolbenpumpe. Dabei weist die Axialkolbenpumpe den Vorteil auf, daß auf ein selbsthemmendes Getriebe verzichtet werden kann.Alternatively, it is possible that the servomotor is designed as a hydraulically driven servomotor, preferably with an axial piston pump. The axial piston pump has the advantage that a self-locking gear can be dispensed with.
Die Aufgabe wird auch dadurch gelöst, daß ein programmgesteuerter Servomotor in einer Webmaschine als Antrieb für eine Weblade in Verbindung mit einem selbsthemmenden Getriebe vorgesehen ist.The object is also achieved in that a program-controlled servo motor is provided in a loom as a drive for a sley in connection with a self-locking gear.
Im folgenden wird eine bevorzugte Ausführungsform der Erfindung unter Bezugnahme auf die beigefügte Zeichnung erläutert.In the following a preferred embodiment of the invention is explained with reference to the attached drawing.
Es zeigt:
- Fig. 1
- einen schematischen Querschnitt durch eine Webmaschine mit angebautem Antrieb für die Weblade.
- Fig. 1
- a schematic cross section through a loom with attached drive for the sley.
Die in Fig. 1 dargestellte Webmaschine besitzt eine Gestellwand 1, eine Kurbelwelle 2, Kurbelpleuel 3, Ladenschützen 4, eine Weblade 5 und ein Webblatt 6, durch welches die Kettfäden 7 eingezogen sind. Die gewebte Ware 8 wird von den drei Warenbäumen 9a, 9b und 9c durch einen nicht dargestellten Warenbaum-Regulator bei jedem Arbeitsspiel der Webmaschine um ein genau gleiches Stück konstant abgezogen. Eine gleichfalls nicht dargestellte Schaftmaschine bewegt die Webschäfte 10a und 10b mit den Litzen 11a und 11b, durch deren Augen die Kettfäden 7 laufen und dadurch das Webfach 12 bilden, in welches der Schußfaden durch einen nicht dargestellten Schützen eingetragen wird. An der Rückseite der Gestellwand 1 ist Stützelement 13 vorgesehen, über welches die vom Kettbaum 15 kommenden Kettfäden 7 geführt werden. Der Kettbaum 15 ist in Lagern 19 gelagert und wird von einem nicht gezeichneten Motor angetrieben.The weaving machine shown in FIG. 1 has a
Innerhalb der Bruchlinie von Gestellwand 1 ist schematisch der Antrieb für Kurbelwelle 2 dargestellt. Mit Kurbelwelle 2 ist Stirnrad 14 fest verbunden, das mit Ritzel 16 kämmt. Ritzel 16 ist seinerseits mit Schneckenrad 18 fest verbunden, in das Schnecke 20 eingreift. Über Kupplung 21, die die Achse der Schnecke 20 mit der Achse des Servomotors 22 verbindet, kann das Antriebsmoment von Servomotor 22 über den beschriebenen Getriebzug an Kurbelwelle 2 abgegeben werden.The drive for
Die Stellung der Kurbelwelle 2 wird über einen nicht dargestelltes, koaxial zur Kurbelwelle 2 angeordnetes fest mit ihr verbundenes Zahnrad abgenommen. Auf diesem Zahnrad und einem weiteren Zahnrad 24 ist kämmend Zahnriemen 23 angelegt, an dem Marke 25 befestigt ist. Die Marke 25 wird von Sensor 26 erkannt und in ein entsprechendes Signal umgewandelt, das über nicht dargestellte Leitungen an die ebenfalls nicht dargestellte Steuerung weiterleitet wird.The position of the
Die beschriebene Anordnung ist auf beiden Seiten der Webmaschine vorgesehen. Ein Antrieb ist als Leitantrieb geschaltet und der andere als Folgeantrieb. Bei elektrischen Servomotoren wird die gleichmäßige Momenteinleitung in die Kurbelwelle durch Vergleich der Motorströme überwacht und von der Steuerung ggf. nachgeregelt. Die exakte Synchronisation der beiderseitigen Antriebe wird von der Steuerung mit Hilfe der Signale der Sensoren 26 ermöglicht.The arrangement described is provided on both sides of the loom. One drive is connected as a master drive and the other as a slave drive. At electrical servomotors, the even introduction of torque into the crankshaft is monitored by comparing the motor currents and, if necessary, readjusted by the control. The exact synchronization of the drives on both sides is made possible by the control with the aid of the signals from the
Auf diese Weise ist ein präzise arbeitender Webladenantrieb möglich, der im Vergleich zu bisherigen Bauformen höhere Frequenzen des Arbeitsspiels zuläßt, ohne daß die Schützengeschwindigkeit nachteilig erhöht werden müßte.In this way, a precisely working weaving machine drive is possible, which allows higher frequencies of the working cycle in comparison to previous designs, without the shooter speed having to be increased disadvantageously.
- 11
- GestellwandRack wall
- 22nd
- Kurbelwellecrankshaft
- 33rd
- KurbelpleuelConnecting rod
- 44th
- LadenschützenShopkeepers
- 55
- WebladeDrawer
- 66
- WebblattReed
- 77
- KettfädenWarp threads
- 88th
- WareWould
- 99
- WarenbäumeMerchandise trees
- 1010th
- WebschäfteHeald frames
- 1111
- LitzenStrands
- 1212th
- WebfachShed
- 1313
- StützelementSupport element
- 1414
- StirnradSpur gear
- 1515
- KettbaumWarp beam
- 1616
- Ritzelpinion
- 1717th
- TragstrukturSupport structure
- 1818th
- SchneckenradWorm wheel
- 1919th
- Lagercamp
- 2020th
- Schneckeslug
- 2121
- Kupplungclutch
- 2222
- ServomotorServo motor
- 2323
- ZahnriemenTiming belt
- 2424th
- Zahnradgear
- 2525th
- Markebrand
- 2626
- Sensorsensor
Claims (12)
- Mechanical weaving loom, in particular for weaving sieves, having a shaft drive, a shuttle drive and a sley drive which comprises a program-controlled servomotor (22), a self-locking gearing being disposed between the servomotor (22) and the sley (5).
- Mechanical weaving loom according to claim 1, characterized in that the gearing takes the form of a cam drive.
- Mechanical weaving loom according to claim 1 or 2, characterized in that the gearing takes the form of a worm gear (18, 20).
- Mechanical weaving loom according to claim 1, 2 or 3, characterized in that a drive is provided at both ends of the sley (5).
- Mechanical weaving loom according to claim 4, characterized in that means of synchronizing the two drives are provided.
- Mechanical weaving loom according to claim 4 or 5, characterized in that means of comparing the servomotor torques are provided.
- Mechanical weaving loom according to claim 1, 2, 3, 4, 5 or 6, characterized in that it comprises sensors (26), preferably in the form of absolute-value decoders, for monitoring the sley motion.
- Mechanical weaving loom according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the shaft drive comprises a servomotor (22).
- Mechanical weaving loom according to claim 4, 5, 6, 7 or 8, characterized in that one drive is operated as a control drive.
- Mechanical weaving loom according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that the servomotor (22) takes the form of an electric servomotor.
- Mechanical weaving loom according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that the servomotor (22) takes the form of a hydraulically operated servomotor, preferably having an axial piston pump.
- Use of a program-controlled servomotor in a mechanical weaving loom as a drive for a sley (5) in conjunction with a self-locking gearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4122249 | 1991-07-05 | ||
| DE4122249A DE4122249C1 (en) | 1991-07-05 | 1991-07-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0521244A1 EP0521244A1 (en) | 1993-01-07 |
| EP0521244B1 true EP0521244B1 (en) | 1995-07-12 |
Family
ID=6435483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92105253A Expired - Lifetime EP0521244B1 (en) | 1991-07-05 | 1992-03-27 | Weaving loom |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5285820A (en) |
| EP (1) | EP0521244B1 (en) |
| JP (1) | JPH05179539A (en) |
| DE (2) | DE4122249C1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4308243A1 (en) * | 1993-03-11 | 1994-09-15 | Juergens Masch Gmbh & Co | Projectile wide weaving machine |
| DE19924627C1 (en) * | 1999-05-28 | 2001-05-23 | Dornier Gmbh Lindauer | Method for controlling the sequence of movements of the reed shaft of a weaving machine |
| DE102004045208A1 (en) * | 2004-09-17 | 2006-04-06 | Siemens Ag | loom |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2613693A (en) * | 1950-02-17 | 1952-10-14 | Grosvenor Dale Company Inc | Loom |
| GB1327253A (en) * | 1970-11-16 | 1973-08-22 | Mollart Eng Co Ltd | Machine tools having interchangeable tool carrying units |
| US3822726A (en) * | 1972-04-13 | 1974-07-09 | Rosenfors Bruk Ab | Sley driving system with single or double contact for power looms or hand looms |
| US3964524A (en) * | 1975-01-08 | 1976-06-22 | Wayne H. Coloney Co., Inc. | Loom lay drive linkage |
| FR2359917A1 (en) * | 1976-07-26 | 1978-02-24 | Gagey Etienne | Drive mechanism for loom reed, having double acting spring - with periodic frequency designed to reduce power requirements for driving reed |
| JPS60151346A (en) * | 1984-01-18 | 1985-08-09 | 住友電気工業株式会社 | Loom equipped with wefting apparatus of high density fabric |
| JPS6410088U (en) * | 1987-07-08 | 1989-01-19 | ||
| EP0327613B1 (en) * | 1987-08-12 | 1992-09-16 | BORISCH, Fred | Power loom with a mechanical dobby loom |
| DE3743661A1 (en) * | 1987-12-22 | 1989-07-06 | Wangner Gmbh Co Kg Hermann | WEBBED DRIVE FOR A WEAVING MACHINE |
| DE58901071D1 (en) * | 1988-07-08 | 1992-05-07 | Sulzer Ag | FROSTING PROCESS AND WEAVING MACHINE WITH FLORDERING ORGANS. |
| JP2975387B2 (en) * | 1990-02-01 | 1999-11-10 | 株式会社豊田自動織機製作所 | Method and apparatus for driving a reed |
-
1991
- 1991-07-05 DE DE4122249A patent/DE4122249C1/de not_active Expired - Lifetime
-
1992
- 1992-03-27 EP EP92105253A patent/EP0521244B1/en not_active Expired - Lifetime
- 1992-03-27 DE DE59202856T patent/DE59202856D1/en not_active Expired - Fee Related
- 1992-06-19 US US07/901,246 patent/US5285820A/en not_active Expired - Fee Related
- 1992-06-23 JP JP4163204A patent/JPH05179539A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE4122249C1 (en) | 1992-09-24 |
| US5285820A (en) | 1994-02-15 |
| DE59202856D1 (en) | 1995-08-17 |
| JPH05179539A (en) | 1993-07-20 |
| EP0521244A1 (en) | 1993-01-07 |
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