EP0504110B1 - Vorrichtung für das Vermeiden von Schussbanden in eine Webmaschine - Google Patents
Vorrichtung für das Vermeiden von Schussbanden in eine Webmaschine Download PDFInfo
- Publication number
- EP0504110B1 EP0504110B1 EP92810168A EP92810168A EP0504110B1 EP 0504110 B1 EP0504110 B1 EP 0504110B1 EP 92810168 A EP92810168 A EP 92810168A EP 92810168 A EP92810168 A EP 92810168A EP 0504110 B1 EP0504110 B1 EP 0504110B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cloth fell
- loom
- warp
- tension
- displacing
- 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
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
-
- 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
- D03D49/04—Control of the tension in warp or cloth
- D03D49/06—Warp let-off mechanisms
- D03D49/10—Driving the warp beam to let the warp off
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/002—Avoiding starting marks
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/005—Independent drive motors
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
- D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
Definitions
- the present invention relates to an apparatus in a weaving loom for preventing formation of a weaving bar on a woven fabric caused by cloth fell beating by the reed during slow forwgrd or reverse rotation ef the foom which is usually performed subsequently to a stop of weaving operation.
- weaving bar appearing on the fabric is so-called "Ayamakura (Japanese)", i.e., a weaving bar in which wefts are dislocated alternately up and down with respect to the plane of the fabric, thereby forming a swelled defective portion on the fabric surface.
- This type of weaving bar which tends to be formed on a twill fabric, is caused when the cloth fell of a fabric is beaten up by the reed during slow rotation of the loom in either forward or reverse direction.
- this kind of weaving defect is referred to as swelled weaving bar hereinafter. None of the above conventional apparatuses are capable of preventing the formation of such swelled weaving bars.
- the present invention provides an apparatus in a jet loom comprising displacing means for displacing the position of cloth fell of a woven fabric along warps by changing the tension of such warps, control means for controlling the driving amount of safd cloth fell displacing means, detecting means for detecting the driving amount of said cloth fell displaying means, and detecting means for detecting the tension of said warps, said control maans having first function of driving said displacing megns to displace the cloth fell for a predetermined distance toward the fabric from the normal position thereof in advance of rotating the loom at a slow rate in forward or reverse direction, second function of driving said displacing means to move the cloth fell back to said normal position after completion of said slow rotation of the loom in the forward or reverse direction, third function of determining whether or not the cloth fell displacement has been accomplished properly from the information from said driving amount detecting means representative of detected driving amount of said cloth fell displacing means and, in the event of
- the control means causes the cloth fell displacing means to be driven reverse from the information representative of abnormality and transmitted from the driving amount detecting means. This reverse driving is continued until the warp tension becomes the tension detected by the warp tension detecting means immediately before the commencement of the cloth fell displacement, and the cloth fell is returned to its original position, accordingly.
- FIGS. 1 through 21 show the following:
- reference symbol M designates a main motor whose operation is controlled by a computer control C.
- Reference numeral 1 depicts a let-off motor provided independently of the main motor M and operable reversibly for driving a warp beam 2.
- An array of warps T unwound from the warp beam 2 extends over a back roller 3 and tension roller 4 and then are passed through healds 5 and a reed 6 in a known manner.
- a woven fabric W extends over an extension bar 7, surface roller 8, press roller 9 and crease-removing guide member 10 and is wound round a cloth roller 11.
- the tension roller 4 is mounted at one end of a tension lever 12, the other end of which has a tension spring 13 to urge the tension roller 4 in such direction that applies a predetermined tension to the warps T.
- the tension lever 12 is rotatably supported at one end of a detecting lever 14, the other end of which is operatively connected to a load cell 15 for detecting the warp tension.
- the warp tension is transmitted to the load cell 15 by way of the tension roller 4, tension lever 12 and detecting lever 14, and the load cell 15 is adapted to generate to the computer control C an electrical signal corresponding to the magnitude of the warp tension detected by the load cell.
- the computer control C is operable to control the rotational speed of the let-off motor 1 according to the information from comparison between a predetermined reference tension and the above electrical signal representativs of the warp tension being detected by the load cell 15 and also to the information of the current warp beam diameter which can bs datermined by a detection signal transmitted from a rotary encoder 16 for mlnitoring the rotational angle of the loom. Because the warp tension is adjusted during the weaving operation by controlling the rotational speed of the let-off motor 1 so as to maintain the tension substantially constant, formation of a weaving bar during the weaving operation can be prevented.
- a start switch 17 is connected to the computer control C and the latter commands the let-off motor 1 to rotate in forward direction in response to an ON signal from that start switch.
- a rotary encoder 1a is incorporated in the let-off motor 1 for monitoring the rotational speed thereof and transmitting sfgnals to the control C, which in turn feedback-controls the rotational speed of the let-off motor 1 according to the detection signals from the rotary encoder 1a.
- the surface roller 8 is operatively connected to a winding motor 18 provided independently of the main motor M and operable reversibly, and the rotational speed of the winding motor 18 is feedback-controlled by the control C in response to detection signals transmitted from a rotary encoder 18a incorporated in the motor for monitoring its rotational speed.
- An input device 19 is connected to the computer control C for inputting data of cloth fell displacement quantity, and the computer control C is operable to execute the cloth fell displacement controlling program shown by way of flow chart in FIGS. 7 through 21 on the basis of the above input data.
- the computer control C commands a stop of the main motor M, let-off motor 1 and winding motor in response to a stop signal representative of any abnormglity in the weaving operation and transmitted from a weft inser:tion failure detector 20 or a warp break detector 21, both of which are connected to'ths control C.
- the control C issues the same stop command in response to an ON signal which is transmitted thereto from a manual stop switch 22.
- stop command is provided, the motors M, 1, 18 are stopped synchronously as indicated by lines C1, C2, C3 in FIG. 4, and the warp letting-off and cloth winding operations ara stopped, accordingly, with the reed 6 brought to a stop at a position immediately before its beat-up position as shown fn FIG. 2.
- the computer control C stores the data of warp tension F then detscted by the load cell 15.
- the computer control C then commands the let-off rotor 1 to rotate at a slow rate in forward direction for a quantity Q′ the data of which has been inputted into the control C from the input device 19. That is, when the stop signal 51 is generated because of a failure in weft insertion, the let-off motor 1 is slow-rotated forward for in advance of the subsequent slow reverse rotation of the main motor M for removal of the faulty weft which has caused the detector 20 to generate the stop signal 51.
- the faulty weft can be removed from the fabric in a known manner by using such an apparatus as disclosed by Publication of Japanese Patent Application No. 2-61138 (1990). That is, the loom is rotated reverse for gbout one turn and a half to allow the faulty weft to be released from the grip by the warps for removal of the weft. It is noted that during this reverse rotation of the loom the reed 6 is movad swinging by way of the normal position of the cloth fell W1, namaly the beat-up position of the reed.
- the main motor M is rotated reverse at a slow rate for about one turn and a half as indicated by line e1 in FIG. 4 to place the loom where a warp shed is formed with maximum opening. With the shed thus wide open, the faulty weft on the cloth fell W1 is released from the warps T, thus making it possible for the faulty weft to be removed easily.
- the let-off motor 1 and the winding motor 18 are also slow-rotated in the same reverse direction as indicated by lines q1 and r1 in FIG. 4.
- Such synchronous reverse rotation of the motors 1, 18 allows the warps T to be wound back, or rewound, and the fabric W to be moved back, or unwound; for an amount proportional to the reverse rotation of the loom, respectively.
- Such synchronous rewindirig of the warps T and unwinding of the fabric.W in turn allows the cloth fell W1 to be shifted for a distance corresponding to the reverse rotation of the loom.
- the reed 6 is moved from its stopped position, shown in FIG. 2, to its most retracted position, shown by phantom line in FIG. 3, by way of the normal cloth fell position P, or the beat-up position of the reed 6. If the cloth fell W1 were at this beat-up position P, it would be beaten by the reed 6.
- the cloth fell W1 is displaced or retracted toward the fabric W from the beat-up position P in advance of the reversing operation of the loom, the cloth fell W1 is free from beating by the reed 6: Therefore, those wefts which are adjacent the cloth fell W1 woven only loosely will not be subjected to the disturbance by the reed beating. Thus, formation of the aforementioned swelled weaving bar can be prevented successfully.
- the main motor M is rotated at a slow rate in reverse direction again as indicated by line e2 to move the loom to its weaving-start position immediately before the beatup position to avoid insufficient force in beating-up the cloth at the subsequent start-up of the weaving operation.
- the reed 6 is moved by way of the beat-up position P during this reverse rotatiori of the loom, the cloth fell W1 will receive no beatfng-up action by the reed 6 because the cloth fell is set back from the position P.
- ths lat-off motor 1 and winding motor 18 are also rotated in the same reverse direction as indicated by lines q2 and r2 in FIG. 4.
- the cloth felI W1 is moved back for a distance corresponding to the slow reverse rotation of the loom to its weavingstart position.
- the main motor M may be rotated at a slow rate not in reverse direction but in forward direction to place the loom to the above weaving-start position.
- the let-off motor 1 and the winding motor 18 are both rotated in the same forward direction.
- the let-sff motor 1 is rotated reverse at a slow rate for Q ⁇ so that the warps T are pulled back thereby to shift the cloth fell W1 back to its original position P.
- the computer control C is provided with a first controlling function of driving the let-off motor 1, as the displacing means, to displace the cloth fell W1 from its normal position P toward the woven fabric W in advance of the slow reverse rotation of the loom, and a second controlling function of displacing the cloth fell W1 back to its original position P after completion of the slow reverse rotation of the loom.
- the computer control clears the data of the detected warp tension F. Subsequently, the main motor M, let-off motor 1 and winding motor 18 are set into operation synchronously as indicated by lines D1, D2, D3 in FIG. 4, thus the normal weaving operation being resumed.
- Signal S2 in FIG. 4 represents a stop signal which is generated by other causes than weft insertion failure, i.e. a stop signal which is generated when a warp break is detected by the warp break detector 21 or when the manual stop switch 21 is turned on.
- the control C becomes ready to receive an ON signal from any one of the start switch 17, slow-reversing switch 23 and slow-forwarding switch 24.
- the slow-reversing switch 23 When a weaving flaw on the fabric W is to be removed, the slow-reversing switch 23 is turned on to generate an ON signal S4, shown in FIG. 5, to the computer control C. Accordingly, the let-off motor 1 is rotated forward at a slow rate for Q+, thereby displacing the cloth fell W1 toward the fabric W in advance of the subsequent slowreversing of the main motor M so that the cloth fell will not be beaten by the reed 6 when 11 it is moved to swing.
- the main motor M, let-off motor 1 and winding motor 18 are operated in response to the ON state of the slow-reversing switch 23 to be rotated reverse at a slow rate in synchronism with each other is indicated by lines e4, q4, r4.
- the motors M, 1; 18 are Stopped, which is then followed by slow reverse rotation of the let-off motor 1 for Q ⁇ .
- This reversing operation of the let-off motor 1 pulls back the warps T thereby to shift the cloth fell W1 back to its original position P.
- the slowreversing switch 23 In removing the flaws on the fabric W, the slowreversing switch 23 is operated ON/OFF for as many times as the number of defective wefts to be removed and, for the final adjustment of the cloth fell W1 to move it back to its original position, the slow-forwarding switch 24 may be used. As shown in FIG. 6, the displacement of the cloth fell W1 is performed in the same way in slow-forwarding the motors M, 1, 18 (as indicated by e5, q5, r5) in response to ON/OFF signals 55 from the slow-forwarding switch 24 as in the slow reversing of the motors by use of the slow-reversing switch 23 as shown in FIG. 5.
- Displacement of the cloth fell W1 in advance of the synchronous slow-reversing of the motors M, 1, 18, as inidicated by e3, q3, r3, is done in the same way as in the above case, and it is moved back to its original position after the synchronous slow-reversing of the motors. Because the cloth fell W1 is thus retrccted away from the beat-up position P, it will not be beaten by the reed 6 moving by way of the position P while the loom is being slow-reversed to its weaving-start position.
- the distance ⁇ for which the cloth fell W1 is displaced from its normal position toward the fabric W depends on the kind of fabric to be woven, but it should be set at a minimum requirement to minimize a possible error in returning the cloth fell W1 to its original position.
- the cloth fell displacement should fail to be performed properly, e.g., if the let-off motor 1 has failed to be slow-rotated forward for the desired quantity Q+, as shown by line Q in FIG. 4, this abnormality is determined by the rotary encoder 1a monitoring the rotation of the let-off motor 1. Responding to a signal transmitted from the rotary encoder 1a and representative of such abnormalfty, the computer control C commands the let-off motor to be slow-rotated in reverse direction. Accordingly, the warps T are wound back thereby increasing their tension. The increasing tension is detected continuously by the load cell 15 and the information of such increasing warp tension is sent to the computer control C.
- the computer control C has a third function of determining whether or not the cloth fell displacement has been accomplished properly from the information from the rotary encoder 1a and, in the event of abnormality of the displacement, driving the let-off motor 1 until the warp tension being detected by the lood cell 15 is increased to the stored warp tension F corresponding to the tension detected immediately before the commencement of the cloth fell displacement.
- the cloth fell W1 is returned to its original position P by the restoration of the warp tension, merely turning on the start switch 17 after manually removing the faulty weft will position the cloth fell W1 in place and set the loom into weaving operation as in the previous case.
- the weaving operation can be restarted without intervention of manual adjustment of the cloth fell position.
- the above warp tension restoration is performed in the same manner and the device 25 is energized to alarm the loom operator of the abnormality. Turning on the start switch 17 after the warp tension restoration, the cloth fell W1 is positioned originally and the loom set into weaving operation.
- a possible cause of the cloth fell displacement failure i.e., failure of the let-off motor 1 to rotate forward or reverse for the desired quantity Q+ or Q ⁇ , includes a control communication error, or such a case in which the cloth fell displacement by feedback controlling has failed to be accomplished in a predetermined time.
- the slow reverse rotation of the let-off motor 1 for the warp tension restoration is feedback-controlled on the basis of the detected warp tension.
- the possibility of simultaneous fault with this feedback-controlling and the other feedback-controlling from the rotation detected by the rotary encoder 1a is extremely low. Therefore, the warp tension restoration subsequent to a failure in the cloth fell displacement can be performed with a high degree of certainty and the procedures to be performed subsequent to the failure can be carried out with smoothness.
- an automatic restarting of weaving operation may be substituted with a manual restart by means of the start switch 17.
- Fear of restarting the weaving operation with a swelled weaving bar formed on the fabric may be forestalled if it is so arranged that the alarming device 25 is activated in case of the abnormality.
- the cloth fell displacement is effected by driving the winding motor.
- the cloth fell is displaced toward the fabric by increasing the warp tension.
- the apparatus according to the invention in which the cloth fell is displaced toward the fabric, or retracted away from the swinging area of the reed, in advance of the slow-rotation of the loom in forward or reverse direction so that the cloth fell will not be beaten by the reed moving by way of the beat-up position during the above forward or reverse slow-rotation of the loom, can offer a useful advantage in that the formation of a defective swelled weaving bar to be caused by interference between the reed and the cloth fell can be prevented successfully.
- control is operated so as to restore the warp tansion to the tension detected immediately before the commencement of the cloth fell. displacement, so that the cloth fell is free from beating-up by the reed.
- the apparatus prevents formation of a swelled weaving bar which is caused by interference of the reed and the cloth fell during slow rotation of the loom in forward or reverse direction.
- the let-off motor 1 is rotated at a slow rate in forward direction in advance of the subsequent slow forward or reverse rotation of the main motor M for removal of a faulty weft yarn. Operation of the let-off motor 1 is controlled by a computer control C and the motor is forward rotated for a predetermined amount so as to displace the cloth fell W1 toward the fabric W, or retract it away from the swinging area of the reed 6. In restarting the weaving operation, the let-off motor 1 is slow rotated in reverse direction to return the cloth fell to its original position.
- the rotation of the let-off motor 1 is monitored by the rotary encoder 1a incorporated therein and connected to the computer control C 1a so that the control C can determine whether or not the cloth fell displacement is accomplished properly.
- the warp tension detected by the load cell 15 is restored to the tension F detected by the load cell immediately before the commencement of the cloth fell displacement.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Claims (6)
- Vorrichtung zum Vermeiden von Schussbanden im Gewebe einer Webmaschine, wobei die Vorrichtung umfasst:
eine Einrichtung (1, 2, 1a, 8, 18, 18a) zum Verschieben der Lage der Anschlagkante (W1) eines gewobenen Gewebes in Richtung der Kette, indem die Kettspannung (W) verändert wird,
eine Einrichtung (C) zum Regeln des Betrags der Verschiebung der Anschlagkante durch die Einrichtung (1, 2, 1a, 8, 18, 18a) zum Verschieben und
eine Einrichtung (4, 12, 14, 15) zum Bestimmen der Kettspannung, gekennzeichnet dadurch:
dass sie eine Messeinrichtung (15) zum Bestimmen der Grösse der Verschiebung mit der Einrichtung (1, 2, 1a, 8, 18, 18a) zum Verschieben der Anschlagkante aufweist,
dass die Einrichtung (C) zum Regeln
eine erste Funktion für die Einrichtung (1, 2, 1a, 8, 18, 18a) erfüllt, nämlich das Verschieben der Anschlagkante (W1) um einen vorbestimmten Weg (ρ), in Richtung des Gewebes, aus seiner normalen Lage, bevor die Webmaschine langsam in Drehrichtung vorwärts oder rückwärts dreht,
eine zweite Funktion für die Einrichtung (1, 2, 1a, 8, 18, 18a) erfüllt, nämlich das Verschieben der Anschlagkante (W1) zurück in die normale Lage, nachdem das langsame Drehen der Webmaschine in Richtung vorwärts oder rückwärts erfolgt ist,
eine dritte Funktion ausübt, nämlich aufgrund der Information der Messeinrichtung zum Bestimmen der Grösse der Verschiebung der Anschlagkante festzustellen, ob das Verschieben (ρ) der Anschlagkante mit der Einrichtung zum Verschieben der Anschlagkante richtig beendet ist, oder nicht, wobei die Einrichtung zum Verschieben der Anschlagkante angetrieben wird, bis die Kettspannung so gross ist, dass sie der Spannung entspricht, welche an der Kette von der Einrichtung zum Bestimmen der Kettspannung unmittelbar vor dem Beginn des Verschiebens der Anschlagkante gemessen wurde. - Vorrichtung nach Anspruch 1 oder 2, bei welcher die Kette (W) aus Kettfäden gebildet ist.
- Vorrichtung nach Anspruch 1, bei welcher die Einrichtung zum Regeln der Einrichtung zum Verschieben der Anschlagkante einen softwareprogrammierbaren Computer (C) aufweist.
- Vorrichtung nach Anspruch 3, bei welcher im softwareprogrammierbaren Computer (C) die Werte der Kettspannung gespeichert sind, welche von der Einrichtung (4, 12, 14, 15) zum Bestimmen der Kettspannung, vor dem Beginn des Verschiebens gemessen werden.
- Vorrichtung nach Anspruch 3 oder 4, bei welcher die Einrichtung zum Verschieben der Anschlagkante um einen Betrag, Motoren (1, 18) aufweist, welche vom Computer (C) geregelt werden.
- Webmaschine, insbesondere Luftdüsenwebmaschine mit einer Vorrichtung nach einem der Ansprüche 1 bis 5.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40327/91 | 1991-03-06 | ||
JP3040327A JP2565004B2 (ja) | 1991-03-06 | 1991-03-06 | 織機における織段発生防止装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0504110A1 EP0504110A1 (de) | 1992-09-16 |
EP0504110B1 true EP0504110B1 (de) | 1995-06-21 |
Family
ID=12577514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92810168A Expired - Lifetime EP0504110B1 (de) | 1991-03-06 | 1992-03-05 | Vorrichtung für das Vermeiden von Schussbanden in eine Webmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0504110B1 (de) |
JP (1) | JP2565004B2 (de) |
DE (1) | DE69203012T2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5538048A (en) * | 1993-01-19 | 1996-07-23 | Sulzer R uti AG | System and method for regulating the cloth fell position in a loom |
DE59309430D1 (de) * | 1993-01-19 | 1999-04-15 | Rueti Ag Maschf | Verfahren zur Regelung der Warenrandstellung und Webmaschine zur Durchführung des Verfahrens |
EP0629725A1 (de) * | 1993-06-15 | 1994-12-21 | Sulzer RàTi Ag | Verfahren zum Starten einer Webmaschine und Webmaschine zur Durchführung des Verfahrens |
EP0629726A1 (de) * | 1993-06-15 | 1994-12-21 | Sulzer RàTi Ag | Verfahren zur Vermeidung eines Webfehlers bei der Gewebebildung und Webmaschine zur Durchführung des Verfahrens |
JP4142474B2 (ja) * | 2003-03-18 | 2008-09-03 | 津田駒工業株式会社 | 織機の織り段防止方法及び装置 |
JP2006336157A (ja) * | 2005-06-02 | 2006-12-14 | Tsudakoma Corp | 織口位置調整装置 |
CN110258008A (zh) * | 2019-07-11 | 2019-09-20 | 台嘉玻璃纤维有限公司 | 一种薄织物断经感应装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2894709B2 (ja) * | 1988-12-28 | 1999-05-24 | 株式会社豊田中央研究所 | 経糸速度制御装置 |
-
1991
- 1991-03-06 JP JP3040327A patent/JP2565004B2/ja not_active Expired - Lifetime
-
1992
- 1992-03-05 EP EP92810168A patent/EP0504110B1/de not_active Expired - Lifetime
- 1992-03-05 DE DE69203012T patent/DE69203012T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0504110A1 (de) | 1992-09-16 |
JP2565004B2 (ja) | 1996-12-18 |
DE69203012T2 (de) | 1996-02-22 |
JPH04281046A (ja) | 1992-10-06 |
DE69203012D1 (de) | 1995-07-27 |
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Legal Events
Date | Code | Title | Description |
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