EP0501213B1 - Dispositif de transport et d'empilage d'objets plats - Google Patents

Dispositif de transport et d'empilage d'objets plats Download PDF

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Publication number
EP0501213B1
EP0501213B1 EP92102172A EP92102172A EP0501213B1 EP 0501213 B1 EP0501213 B1 EP 0501213B1 EP 92102172 A EP92102172 A EP 92102172A EP 92102172 A EP92102172 A EP 92102172A EP 0501213 B1 EP0501213 B1 EP 0501213B1
Authority
EP
European Patent Office
Prior art keywords
conveyor
vacuum chambers
vacuum
endless belts
stepwise
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
Application number
EP92102172A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0501213A1 (fr
Inventor
Jean-Luc Mion
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Martin SA
Original Assignee
Martin SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Martin SA filed Critical Martin SA
Priority to AT92102172T priority Critical patent/ATE92882T1/de
Publication of EP0501213A1 publication Critical patent/EP0501213A1/fr
Application granted granted Critical
Publication of EP0501213B1 publication Critical patent/EP0501213B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/32—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from pneumatic, e.g. suction, carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/323—Overhead suction belt, i.e. holding material against gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated

Definitions

  • the invention relates to a device for transporting and stacking flat objects, in particular cut sides, plates or cardboard boxes, of the type comprising a conveyor with sequentially driven endless belts acting jointly with a vacuum chamber and ejectors for moving flat objects away from the conveyor's endless belts for stacking in a store.
  • US Patent No. 3,820,779 relates to a device using, for transporting the corrugated sheets, a conveyor equipped with a plurality of parallel conveyor belts spaced laterally from each other. These conveyor belts are driven sequentially using a member in the form of a Maltese cross, making it possible to slow down and stop the conveyor belts at each advancement cycle of the plates.
  • a vacuum device intended to suck the cardboard plates against the conveyor belts, the suction being effected through spaces left free between each of these belts.
  • the lower part of the vacuum device consists of support members for the belts which are also spaced from one another so that the space left free between the belts is preserved.
  • the device described also comprises means for ejecting the plates, intended to move the latter away from the belts so as to drop them, by gravity, into one or more stores.
  • These ejection means consist of two arms connected to each other, at their lower part, by a strip intended to come into contact with the upper face of the cardboard plate to be ejected.
  • These arms are controlled in synchronism with the sequential movement of the belts.
  • the two arms are provided with a valve arranged inside the vacuum device.
  • the valve When establishing the suction, the valve is moved away from the upper face of the support members of the belts by means of stops mounted on each of the arms of the ejection means. The suction is then cut off, during the ejection operation of a plate, by the return by gravity of the valve which will thus close the upper part of the spaces separating each support member from the belts.
  • the ejection members are controlled by means which are permanently coupled to the sequential control means of the conveyor belts. This feature is inconvenient when it is desired to use several successive stacking magazines, because, in this case, it is not possible without other to place two transport devices, as described, one following the 'other. In fact, since the action of the ejection members cannot be neutralized, it will be compulsory to provide for transport of the plates on two levels and to use a path deflector to direct the plates towards one or the other of the devices. transport and stacking as well as adding at least one additional transporter to this set. This will be costly and will further increase the risk of stack disturbance.
  • the object of the present invention is to remedy these drawbacks by solving the problem of transporting and stacking flat objects in machines for converting cardboard or corrugated cardboard.
  • the device for transporting and stacking flat objects comprises a conveyor with endless belts driven sequentially, arranged side by side, the upper part of their lower strand respective is in contact with support members arranged so as to leave between them a space, communicating with a vacuum member, in which are placed ejection members equipped with means acting on the support members of the endless belts , so as to close the space left free between said support members, said ejection members being moved sequentially from top to bottom and from bottom to top, characterized in that the upper face of the lower strands of the endless belts bears against the lower face of a vacuum member composed of several separate vacuum chambers separated one from the other others by a channel, each of said vacuum chambers being provided with suction orifices located in the vicinity of the lateral edges of the endless belts, in that each of the vacuum chambers is connected to a common suction hood and in that that the ejection members, arranged in each channel separating two consecutive vacuum chambers, are constituted by elements pivoting sequential
  • the underside of the vacuum chambers has a convex surface whose curvature is defined by the arrow of the lower strand of the endless belts.
  • the latter provides a device for transporting and stacking flat objects comprising sequentially pivoting elements constituted by ejector levers acting on a linear member constituted by a strip of flexible material, anchored by one of its ends, to a first cross member placed at the upstream part of the conveyor, while its other end is held by compensating means, constituted by compression springs, fixed on a second cross member placed at the downstream part of the carrier.
  • the latter provides a device for transporting and stacking flat objects, comprising channels, separating the vacuum chambers from one another, which are connected to the atmosphere or, according to a preferred embodiment, to a pressure source.
  • the device for transporting and stacking flat objects comprises ejection members which are constituted by pivoting levers whose sequential drive is disengageable with respect to the sequential drive of the endless belts of the conveyor.
  • the advantages obtained thanks to this invention consist essentially in that the transport and stacking of the flat objects can be carried out at high speed without there being any relative movement between the members for ejecting the flat objects and the upper face of these at the time of their distance from the conveyor belts and in that it is possible to achieve, using two identical devices, according to the invention, stacking flat objects in two consecutive stores by moving said objects in a single plane corresponding to the plane defined by the lower faces of the lower strand of the conveyor belts. Consequently, the device for transporting and stacking flat objects is distinguished by very high operating safety at high speed, by very high stacking precision and by the absence of deterioration of the flat objects transported and stacked.
  • the receiving station 1, of a corrugated cardboard processing machine, represented in FIG. 1 is formed by two lateral frames 2 and 3 connected to each other by crosspieces 4, 5, 6, 7, 8, 9, 10, 11 and 12.
  • the conveyor 13 is suspended at crosspieces 5 and 6.
  • a stacking magazine 14 comprising a front wall 15 and a rear wall 16 is arranged below the conveyor 13.
  • This stacking magazine 14 is, for its part, placed above a package evacuation device 17 resting on the crosspieces 8 and 11 and comprising two roller conveyors 18 and 19.
  • the drive members of the endless belts 19 as well as the drive members of the ejector members, for example ejector levers 20, are arranged in a casing 21 fixed against the external face of the frame 3.
  • the transport and stacking device shown in FIG. 2 comprises a transport element composed of an endless belt 19 passing around a drive pulley 22 placed downstream of the transport element and around another pulley 23 placed upstream thereof.
  • the drive pulley 22 is crossed by a control shaft 24 connected to sequential drive members (not shown) which can be in the form of a conventional cam and lever drive capable of transmitting an appropriate movement to the belts 19
  • sequential drive members (not shown) which can be in the form of a conventional cam and lever drive capable of transmitting an appropriate movement to the belts 19
  • This movement is advantageously chosen so that the belts 19 move at high speed during a first part of their advance and that their deceleration, to reach the stop, is as judicious as possible to preserve an optimum stop tempe. during which the corrugated cardboard 25 transported will be moved away from the endless belts 19 for stacking.
  • the upper face 26 of the lower strand 27 of each belt 19 (see FIG. 3) is in contact with the lower face 28 of each of the chambers depression 29 during the suction phase of a corrugated cardboard plate, that is to say when it is being moved in the device.
  • the corrugated cardboard plate 25 is represented in its ejection phase, that is to say when it has been moved away from the endless belts 19.
  • ejector levers 20 mounted on the pivoting shafts 31 are used.
  • the pivoting shafts 31 are connected, so that they can be temporarily disengaged, to drive members (not shown) whose movement, when transmitted, is synchronized with the movement or stopping of the endless belts 19.
  • the ejector levers 20 will be actuated by in such a way that their action on a linear member such as, for example, a flexible strip 32 or a section of belt causes the corrugated cardboard plate 25 to move away then to fall into the stacking magazine 14.
  • This strip f the hose 32 is anchored at one of its ends to the cross-member 7 disposed upstream of the conveyor element while its other end is fixed, after passing around two idler rollers 33 and 34, to a compensating spring 35 mounted on the cross-member 4.
  • the fixing of the flexible strip 32 will be explained in more detail during the description of FIG. 7.
  • Each of the vacuum chambers 29 is connected to a suction hood 36 by channels 37 and 38.
  • the suction hood 36 is equipped with a turbine 39 mounted in the evacuation channel 40.
  • the stacking magazine 14, placed below the conveyor elements has a front wall 15 in the width of which is mounted a series of upper pneumatic cylinders 41 and a series of lower pneumatic cylinders 42.
  • the stacking magazine 14 also has a rear wall 16 in which is mounted, a series of upper pneumatic cylinders 43 and a series of pneumatic lower cylinders 44.
  • the series of cylinders 41 of the front wall 15 is mounted facing the series of cylinders 43 of the rear wall 16 while the series of cylinders 42 of the front wall 15 is mounted opposite the series cylinders 44 of the rear wall.
  • the rods 45, respectively 46 of these jacks 41 to 44 are alternately advanced and withdrawn from the faces of the front 15 and rear 16 walls so as to temporarily form an upper grid and a lower grid for retaining the corrugated sheets 25.
  • the upper grid formed by the rods 45 and 46 of the jacks 41 and 43 which will have been advanced, will retain the corrugated plates 25 from the conveyor elements, and the corresponding rods can be removed from the cylinders 42 and 44 so as to drop the packet 47 of plates located on the lower grid formed by the rods of the lower cylinders on the roller conveyor 18 which will evacuate the packet 47 to the exit of the receiving station.
  • FIG. 3 represents a simplified version of a transport and stacking device in its suction phase, for example at the moment when, the endless belts 19 having stopped, the ejector levers 20 will start to push the flexible strip 32 downwards to move the corrugated cardboard plate away from the belts 19.
  • the conveyor elements used are the same as those described with reference to FIG. 2. Consequently, the reference numbers will be identical.
  • This version relates to a simpler embodiment of the stacking magazine 14, which always includes a front wall 15 and a rear wall 16. However, by a judicious choice of the height at which the jacks 41 and 43 are placed, it is it is possible to use only a series of these jacks to form a grid using rods 45 and 46.
  • the stacking of corrugated cardboard plates 25 is carried out directly on the rollers 48 of the conveyor rollers 18.
  • the height of the pack of plates 47 having been reached, the rods 45 and 46 will be advanced and will retain the corrugated sheets 25 coming from the transporting elements until the packet 47 has been discharged by the roller conveyor 18 The rods 45 and 46 will then be removed and the pack of plates which will have formed on these rods 45 and 46 will again fall on the rollers 48 of the roller conveyor 18.
  • FIG 4 is a sectional view along IV-IV of Figure 3 showing the arrangement of the vacuum chambers 29 in the width of the conveyor 13 with endless belts 19.
  • FIG. 4 only four vacuum chambers 29 have been shown but it is obvious that in practice the number of vacuum chambers 29 can be increased, this depending on the width of the conveyor 13.
  • each of the vacuum chambers 29 is located in a single plane 30 so that the upper face of the lower strand 27 of each endless belt 19 is in contact with its respective vacuum chamber during the suction of a corrugated cardboard plate 25.
  • the vacuum chambers 29 are separated from each other by a channel 49 which either communicates with the atmosphere or is connected to a pressure source as will be described later in relation to FIG. 8.
  • a channel 49 which either communicates with the atmosphere or is connected to a pressure source as will be described later in relation to FIG. 8.
  • each channel 49 provision has been made to mount an ejector lever 20 whose end 50 (see FIG. 3) is permanently in contact with the upper face 51 of the flexible strip 32.
  • the lower part channels 49 has an opening 52 extending throughout each vacuum chamber 29.
  • the ejector levers 20 occupy a position such that the flexible strip 32 will close the opening 52 so that that a vacuum can be established, by the suction orifices 53 arranged in the lower faces 28 of the vacuum chambers 29, in the intervals 54 separating the lower strands 27 from the endless belts 19 and the flexible bands 32.
  • Each ejector lever 20 is made integral with the shaft 31 by conventional fixing means, for example keys 55 and locking screws (not shown).
  • Figure 5 shows the conveyor 13 as it appears in the ejection phase of a corrugated cardboard plate 25.
  • the reference numbers are the same as those of Figure 4 due to the similarity of the two figures.
  • the endless belts 19 are stopped and the flexible bands 32 have been pushed down under the action of the ejector levers 20 thus forcing the corrugated board plate 25 to fall on the rods 45 and 46 of the cylinders 41 and 43.
  • the suction established through the orifices 53 will be vented, on the one hand, by the zone 56 located between the conveyor 13 and the corrugated cardboard plate 25 and, on the other hand, by the openings 52 of the channels 49.
  • the transport and stacking device shown in FIG. 6 comprises two stacking magazines 60 and 61.
  • These two stacking magazines 60 and 61 are constituted by two conveyors 62 and 63 in all points identical to the transporter 13 described above.
  • These conveyors 62 and 63 arranged one after the other are arranged in such a way that the movement of the ejector levers 20 can be temporarily disengaged so that corrugated cardboard plates 64 are transported at 65 and at 66 in the stacking magazines 60 and 61 and then only ejected by the ejector levers 20 and the flexible bands 32 so as to form, according to a mode already explained, packages 67 and 68 which will then be evacuated by the roller conveyor 69.
  • FIG. 7 represents the method of attachment chosen for the flexible strip 32.
  • one of the ends 72 of the flexible strip 32 is anchored on the cross member 7.
  • This cross member 7 is constituted by a metal tube 73 of rectangular section .
  • a guide piece 74, machined in a metal tube of square section is attached by welding to the tube 73.
  • a reinforcement 75 is welded to the face 76 of the tube 73.
  • the end 72 of the flexible strip 32 is folded around a rod 77 of circular section.
  • a stop shoe 78 has a housing 79 in which the end 72 of the flexible band 32 folded around the rod 77 engages. The end 72 is blocked by tightening, at least with screws. 80, the stop shoe 78 against the reinforcement 75.
  • the flexible strip then passes over the guide piece 74 and its other end 81, also folded around a rod 82, is pinched between a plate 83, welded to the end 84 of a pull tab 85, and a counterplate 86 using screws 88 and nuts 89.
  • the pull tab 85 has, at its end 91, a thread 90 on which a nut 92 engages and a lock nut 93 intended to ensure the tensioning, via the compression spring 94, of the flexible band 32.
  • the compression spring 94 bears on the one hand against the ferrule 95, fixed against the cross-member 4 by screws 96, and on the other hand against a washer 97 retained by the nut 92 blocked by the lock nut 93.
  • the compression spring 94 is mounted in a tube 98 fixed to the ferrule 95.
  • FIG. 8 represents the way in which it is planned to apply an overpressure in the channels 49 separating two vacuum chambers 29.
  • the channels 49 will have been closed at their ends and connected, by a pipe 99, to the channel d 'evacuation 40 by a tu y to 100.
  • the pipe will be fitted with a pressure limiter 101 shown diagrammatically in this figure. It is understood that this way of producing the overpressure device is only an example and that a separate pressure source could also be used to supply the channels 49.
  • FIG. 9 shows a particular embodiment of the lower part of a conveyor 13.
  • This operating arrow 102 disturbs the suction when a vacuum chamber 29 is used, the lower face 28 of which is perfectly straight (see FIG. 3).
  • a vacuum chamber 103 is preferably used, the lower face 104 of which is machined as a function of the arrow 102 of the lower strand 27 of the endless belt 19, which has previously been measured or calculated.
  • the lower surface 104 of the vacuum chamber 103 will therefore be a convex surface against which the endless belts 19 as well as the flexible bands 32 will bear.
  • FIG. 10 shows, by way of example, a method of constructing an ejector lever 20.
  • the ejector lever 20 comprises a body 105 in which recesses 106 will have been provided in order to reduce its mass.
  • Support means such as a roller 107, are mounted at one end of the body 105.
  • This roller 107 could be, for example a ball bearing.
  • the other end of the body 105 is equipped with a shell 108 intended to hold the ejector lever laterally on its axis 31, using the screws 109 and 110.
  • the key 55 ensures the transmission of the pivoting movement of the shaft 31 to the ejector lever 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Making Paper Articles (AREA)
  • Pile Receivers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Packaging Of Special Articles (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Specific Conveyance Elements (AREA)
EP92102172A 1991-02-26 1992-02-10 Dispositif de transport et d'empilage d'objets plats Expired - Lifetime EP0501213B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92102172T ATE92882T1 (de) 1991-02-26 1992-02-10 Transport- und stapelvorrichtung fuer flache objekte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102522A FR2673170A1 (fr) 1991-02-26 1991-02-26 Dispositif de transport et d'empilage d'objets plats.
FR9102522 1991-02-26

Publications (2)

Publication Number Publication Date
EP0501213A1 EP0501213A1 (fr) 1992-09-02
EP0501213B1 true EP0501213B1 (fr) 1993-08-11

Family

ID=9410277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102172A Expired - Lifetime EP0501213B1 (fr) 1991-02-26 1992-02-10 Dispositif de transport et d'empilage d'objets plats

Country Status (11)

Country Link
US (1) US5201513A (ja)
EP (1) EP0501213B1 (ja)
JP (1) JPH0737296B2 (ja)
KR (1) KR950012528B1 (ja)
AT (1) ATE92882T1 (ja)
BR (1) BR9200630A (ja)
CA (1) CA2060637C (ja)
DE (1) DE69200010T2 (ja)
DK (1) DK0501213T3 (ja)
ES (1) ES2043472T3 (ja)
FR (1) FR2673170A1 (ja)

Families Citing this family (22)

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FR2693179B1 (fr) * 1992-07-03 1994-10-14 Martin Sa Organe de retenue de feuilles pour un magasin d'empilage.
TW252087B (ja) * 1993-11-25 1995-07-21 Meinan Machinery Works
US5537936A (en) * 1994-02-02 1996-07-23 Lin Pac, Inc. Support structure for supporting a load
US5676362A (en) * 1995-09-01 1997-10-14 Texo S.R.L. Vacuum-type transport device for printing units for packaging cardboard sheets
US6053695A (en) * 1997-12-02 2000-04-25 Ite, Inc. Tortilla counter-stacker
AU7953701A (en) * 2000-08-18 2002-02-25 Ferag Ag Method and arrangement for the production of crossed stacks
ATE288397T1 (de) 2000-10-10 2005-02-15 Ib Gronbjerg Stapelvorrichtung für stanzprodukte
US20070182776A1 (en) * 2006-02-08 2007-08-09 Bart Parish Optical sensing equipment
JP5111155B2 (ja) * 2008-02-26 2012-12-26 デュプロ精工株式会社 排紙装置
JP5364174B2 (ja) 2009-02-02 2013-12-11 ボブスト ソシエテ アノニム 加工機械の送込みステーション内において板状要素を位置決めする装置
JP2011073873A (ja) * 2009-10-02 2011-04-14 Riso Kagaku Corp 両面印刷装置
CN101746622B (zh) * 2009-12-23 2013-01-02 浙江双友物流器械股份有限公司 板材进料机
EP2711318B1 (de) * 2012-09-25 2015-08-12 Multigraf AG Vorrichtung und Verfahren zur Förderung von Bogen sowie Fördersystem
CN104444527B (zh) * 2014-10-30 2016-11-23 四川成峰机械有限公司 一种纸板出料结构
US11318509B2 (en) * 2017-11-06 2022-05-03 Air Systems Design, Inc. Dust hood
DE102019102774A1 (de) * 2019-02-05 2020-08-06 Koenig & Bauer Ag Bogenauslage, eine Bogenbearbeitungsmaschine und ein Verfahren zum Betreiben einer Bogenbearbeitungsmaschine
FR3093097B1 (fr) 2019-02-26 2021-04-23 Bobst Lyon Séparateur pour réception transitoire d’éléments en plaque entre une table élévatrice et un transporteur de sortie de paquets d’éléments
FR3093096B1 (fr) 2019-02-26 2021-04-23 Bobst Lyon Station et procédé de réception d’éléments en plaque pour une machine de fabrication d’emballage
CN109967651A (zh) * 2019-04-12 2019-07-05 安徽政平金属科技股份有限公司 一种冷轧钢板收料机及其使用方法
CN115946459B (zh) * 2023-01-09 2023-11-17 淮安嘉源包装有限公司 一种基于水性油墨的包装盒绿色印刷工艺
DE102023100506A1 (de) 2023-01-11 2024-07-11 Mb Automation Gmbh & Co. Kg System, Vorrichtung und Verfahren zur Herstellung von Modulen oder Vorstufen für Brennstoff- oder Batterie-Zellen
CN117465980B (zh) * 2023-11-21 2024-05-24 龙泉市中泰汽车空调有限公司 汽车空调离合器吸片下料收集设备

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US2987314A (en) * 1959-05-11 1961-06-06 Universal Corrugated Box Mach Bottom feed sheet stacker
DE1115566B (de) * 1959-05-11 1961-10-19 Universal Corrugated Box Mach Bandstapler fuer im wesentlichen steife Zuschnitte aus Wellpappe, Karton od. dgl.
US3305233A (en) * 1963-05-07 1967-02-21 Weyerhaeuser Co Ejector mechanism for vacuum conveyor
FR1542578A (fr) * 1966-07-16 Carl Mueller K G Fa Procédé et installation pour la manutention et le dépôt de matière en feuilles, notamment de feuilles de contreplaqué ou analogues
US3406966A (en) * 1966-08-01 1968-10-22 United Shoe Machinery Corp Machines for stacking flexible sheets
US3820779A (en) * 1972-04-24 1974-06-28 Deritend Eng Co Sheet delivery apparatus
JPS6160560A (ja) * 1984-08-30 1986-03-28 Mitsubishi Heavy Ind Ltd シ−トスタツカ
US4905843A (en) * 1988-04-07 1990-03-06 U.S. Natural Resources, Inc. Veneer stacking system

Also Published As

Publication number Publication date
US5201513A (en) 1993-04-13
KR950012528B1 (ko) 1995-10-18
JPH0543105A (ja) 1993-02-23
CA2060637A1 (en) 1992-08-27
EP0501213A1 (fr) 1992-09-02
ATE92882T1 (de) 1993-08-15
ES2043472T3 (es) 1993-12-16
JPH0737296B2 (ja) 1995-04-26
BR9200630A (pt) 1992-10-27
CA2060637C (en) 1997-03-25
FR2673170A1 (fr) 1992-08-28
DE69200010T2 (de) 1993-12-09
DE69200010D1 (de) 1993-09-16
KR920016323A (ko) 1992-09-24
DK0501213T3 (da) 1993-11-29

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