EP0403901A2 - Dispositif de tri pour des éléments plats découpés - Google Patents

Dispositif de tri pour des éléments plats découpés Download PDF

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Publication number
EP0403901A2
EP0403901A2 EP90110940A EP90110940A EP0403901A2 EP 0403901 A2 EP0403901 A2 EP 0403901A2 EP 90110940 A EP90110940 A EP 90110940A EP 90110940 A EP90110940 A EP 90110940A EP 0403901 A2 EP0403901 A2 EP 0403901A2
Authority
EP
European Patent Office
Prior art keywords
switch
sorting
transport
blank
blanks
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.)
Granted
Application number
EP90110940A
Other languages
German (de)
English (en)
Other versions
EP0403901B1 (fr
EP0403901A3 (fr
EP0403901B2 (fr
Inventor
Erwin Jeske
Manfred Ott
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.)
Bielomatik Leuze GmbH and Co KG
Original Assignee
Bielomatik Leuze GmbH and Co KG
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
Family has litigation
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Application filed by Bielomatik Leuze GmbH and Co KG filed Critical Bielomatik Leuze GmbH and Co KG
Publication of EP0403901A2 publication Critical patent/EP0403901A2/fr
Publication of EP0403901A3 publication Critical patent/EP0403901A3/fr
Publication of EP0403901B1 publication Critical patent/EP0403901B1/fr
Application granted granted Critical
Publication of EP0403901B2 publication Critical patent/EP0403901B2/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
    • B65H29/58—Article switches or diverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/38—Collecting or arranging articles in groups
    • 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
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2022—Initiated by means responsive to product or work
    • Y10T83/2024—Responsive to work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2074—Including means to divert one portion of product from another
    • Y10T83/2083—Deflecting guide
    • Y10T83/2085—Positionable gate in product flow path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2074—Including means to divert one portion of product from another
    • Y10T83/2087—Diverging product movers

Definitions

  • the invention relates to a sorting device for flat blanks, for example sheets of paper to be checked for certain quality features or errors, in particular high-quality papers, such as art paper, security papers for checks, banknotes or the like.
  • Such sorting devices expediently have at least one movement path for the individual successive blanks, which are distinguished optically or differently according to certain criteria during the run and are separated, for example, in such a way that blanks with certain characteristics are separated from at least one group that does not have such characteristics .
  • the blanks are at least first moved in at least two adjacent lanes, whereby all lanes can be sorted side by side at the same time.
  • Sorting devices can have the disadvantage that adjacent blanks can only be moved on together at the sorting point, for example they can be sorted out, even if only one blank contains the corresponding feature. For this reason, the blanks that have been sorted out in this way have to be manually sorted again in order to achieve a clear separation by category. If, for example, sorting is carried out according to errors, a two-way procedure results in a reject that is twice as much if a sorting error has only one cut. The mentioned sorting is complex, cost-intensive and prone to errors, since it requires a high concentration.
  • the invention is also based on the object of avoiding disadvantages of known designs and, in particular, of creating a sorting device of the type mentioned or of a similar type, which makes it possible in a simple manner to separate out cuts running in separate paths independently of one another according to predetermined criteria.
  • the sorting point is preferably formed by a switch mechanically guiding or deflecting the switch, then this sorting switch is divided into separate individual switches for each of the said cuts or multiple groups of such cuts, the individual switches independently of one another in each case in min at least two points can be reversed.
  • the above-mentioned blanks can either be moved on in the same way according to the requirements or can be moved apart individually or in groups in accordance with one or more distinguishing features. If the sorting is used, for example, to remove rejects, only the defective blanks can be sorted out and collected separately from the faultless blanks.
  • the embodiment described can be advantageous for solving the object on which the invention is based, or in addition also for another switch, for example for a distribution switch which can divide the cutting stream into two or more further career sections by reversing.
  • a distribution switch which can divide the cutting stream into two or more further career sections by reversing.
  • means can be provided by which the blanks in the juxtaposed streams can be moved individually or in groups of juxtaposed blanks at different speeds, for example in such a way that a stream comes to a standstill while the other stream is running.
  • this is preferably achieved in that the associated transport path is divided into adjacent individual transport paths of corresponding width, these individual transport paths being independent can be driven or stopped more or less quickly depending on each other, although the two streams previously ran side by side.
  • At least one collecting station is expediently provided, in which the blanks are stacked on top of one another, for example in edge-flush stack.
  • This collecting station or collecting stations are expediently provided in the running direction shortly after the distribution switch, an overlapping station advantageously being arranged immediately adjacent to the respective collecting station, in which the blanks which are initially moved one behind the other in the running direction initially overlap with one another with the major part of their associated extension in a scale-like manner be placed. The transfer to the collection station then takes place from this overlap station.
  • means can also be provided for counting the blanks moving in the adjacent streams independently or separately, the relaxing counting result of the counting as a signal for the reversal the individual switches or for driving the individual transport tracks can be used. It is expedient to count separately in each stream immediately after the sorting gate in the stream associated with each individual gate as well as immediately before being deposited in the collecting station. This makes it possible to determine whether one or more blanks have been lost or removed between the counting zones lying one behind the other in the running direction, which can be particularly important in the case of the processing of security papers.
  • the blanks After sorting, distributing or collecting, the blanks are moved laterally outwards, preferably in stacks by suitable means, transversely to the previously prevailing running direction, so that they can be transferred in a simple manner to a further transport device, the transport direction of which is preferably approximately parallel to the prevailing running direction .
  • the blanks or sheet stacks of separate collecting stations can be introduced one after the other in the transport direction, these collecting stations being supplied with blanks by the common distribution switch.
  • the sorting device is particularly suitable for so-called sorting cross cutters, in which a web fed from a store in its longitudinal direction is first cut longitudinally to divide adjacent useful webs and optionally trimmed at its edges and then divided by cross cutting into the individual blanks lying next to one another.
  • This cross-cutting and, if necessary, the pulling apart of blanks in the running direction can take place directly in front of the sorting gate, with the individual diverters of which the blank to be discharged can then be led downwards out of the main track, while the blanks that cannot be discharged continue essentially straight through the sorting gate.
  • the test according to the criteria mentioned is expediently carried out shortly before the longitudinal cutting, the web of material being checked separately on both sides of the respective dividing line defined by the longitudinal cut, so that the features mentioned can be recorded independently of one another on both sides of the dividing line.
  • a web inspection system is advantageously provided, which, depending on the requirements, works in the reflected light or reflection or transmitted light method and on both sides of the respective dividing line horizontal test cells influence a separate control unit.
  • the individual switches or the individual transport tracks can be automatically controlled directly by these control units to achieve the effects described.
  • the individual diverters of the distribution diverter are expediently controlled via the separate counting devices of the above-mentioned counting zone.
  • the design according to the invention is also suitable for materials other than paper webs.
  • the device according to the invention can work according to a method in which at least two materials running side by side flow at least on at least one section of the respective individual career path, the material streams coming from a common inlet can be driven differently, but side by side, with these common sections of the material streams Branch is assigned with at least two other similar sections so that the material flows can be continued independently and reversible at any time on one of the two branched ways to compensate for differences in quantity that result from the different flow of the adjacent material flows.
  • the amounts of the material streams running side by side at the ends of the respective branch line can be influenced as desired, independently of one another.
  • the ends of the branch lines are then expediently connected to a common outlet in such a way that the amounts of material or stack that are in the the respective branch line have been collected from the respective material flow, are fed to the outlet one after the other.
  • a sorting device two narrow, for example single-use, separate sorting devices can be placed directly next to one another and their overlapping or collecting stations can be connected to the common outlet via common transverse transport devices and possibly at least one lifting device.
  • the drawing shows a sorting device according to the invention as part of a sorting cutter in a partially simplified perspective view.
  • the subject matter of the invention has a sorting device 1 with which those cuts produced by the cutting device which have been recognized as rejects are discharged from further processing and fed to a reject stack while the remaining blanks are further conveyed for further processing and are initially overlapped in different planes and collected in a number of stacks which is an integral multiple of the number of usable widths 4, 5 produced by the cutting device.
  • a test device 7 is initially provided which, for example, has a test head lying above the conveyor track 3, each with at least one test unit 8 for each useful width 4, 5 has, so that can be checked independently on each width.
  • the test device 7 is followed in the conveying direction arrow 6 by a slitter 9, which divides the material or paper web 14 running on the conveying path 3 in the middle with a longitudinal section, so that two individual webs running side by side are formed.
  • Edge trimmers are expediently provided laterally adjacent to the longitudinal cutter 9 and are used to cut the paper web 14 to the desired width dimension on the longitudinal edges.
  • the slitter 9 and the edge trimmers are followed, for example, by a web feed device 10 having two transport rollers lying one above the other, with which the paper web 14 is pulled off a paper roll and moved by the testing device 7 or the cross cutter 9.
  • the conveyor track is not through conveyor belts, but through free-running rollers, support plates or the like. educated.
  • a cross cutter 11 which expediently has two cutting tools one above the other, one of which is preferably designed, in particular the lower one, for example as a fixed, strip-shaped lower knife 13 and the other as a cutting roller 12.
  • the longitudinally divided paper web 14 passing between the cutting tools is cross-cut by the cross cutter 11 into two aligned, equally sized blanks 15, 16 which are aligned by corresponding acceleration after the Cross-cuts are moved ahead so that consecutive pairs of blanks are separated from each other without contact and at a short distance from one another.
  • the conveyor track 3 which works in the same way over the full width of the web, connects to a sorting switch 17, which has a separate and separately reversible individual switch for each of the two mutually synchronous cutting streams 18, 19.
  • the two essentially identical individual switches 18, 19 are designed such that they either divert any individual cut 15 or 16 of the respective stream transversely to the level of the conveyor track 3 downward to a reject collector 20 or approximately in the direction of conveyance arrow 6 to one above and approximately in the level of the conveyor track 3 lying conveyor 21 can forward.
  • the conveyor 21 expediently also works synchronously across all widths 4, 5.
  • a distributor switch 22 connects to the conveyor 21, with which the material flows running next to one another are either forwarded approximately in the conveying direction arrow 6 to a subsequent transport path 23 lying approximately in the plane of the conveying path 3 or of the conveyor 21, or transversely to this plane, for example can be diverted down to a branch transport track 24.
  • the distribution switch 22 likewise has a separate individual switch 25 or 26 for each utility width 4 or 5, so that each individual incoming cut can either be forwarded or redirected identically designed individual switches 24, 25 can, for example, as movable guide or switch bodies for the blanks each have an acute-angled wedge profile lying transversely to the conveying direction, the wedge tip of which adjoins the conveyor 21 is directed approximately in the opposite direction to the conveying direction The wedge tip lies approximately in the conveying plane, so that the upper wedge flank forwards the respective blank and in the other switch position the wedge tip is raised above the conveying plane, so that the respective blank runs onto the lower wedge flank and is diverted downward onto the transport path 24 .
  • the switch bodies can be pivoted about a common axis, approximately parallel to the conveying plane and perpendicular to the conveying direction, which lies in the region of the wedge edge facing away from the wedge tip, directly adjacent to the transport path 23.
  • the individual switches of the sorting switch 17 and the distribution switch 22 are expediently of the same design.
  • right single switch 18 of the sorting switch 17 is shown so that the associated blank 15 is transferred to the conveyor 21 and the left single switch 19 is shown so that an associated blank 16 'is deflected downwards.
  • the right single switch 25 of the distribution switch 22 is shown in such a way that the associated blank 15 is deflected downward, while the left single switch 26 forwards the associated blank.
  • the two transport tracks 23, 24 deviate in height up and down by approximately the same amount from the conveying level of the conveyor 21, which is thus approximately in a middle plane between the transport tracks 23, 24.
  • an overlap station 31 which lies approximately in the plane of the conveyor track 3, in which the blanks of each of the two adjacent streams of blanks can be stacked on top of one another with suitable overlapping units by suitable acceleration or deceleration.
  • a corresponding overlap station 32 which is offset transversely to the conveying plane 3 or is located below it, is also assigned to the transport path 24 and is expediently opposite the overlap station 31 or offset against the direction of conveyance by at least one useful length or vertically above it.
  • the overlapping station 32 which also has separate overlapping units lying next to one another and is arranged parallel or horizontally to the overlapping station 31, is connected to the distribution switch 22 via an inclined intermediate transport path that overcomes the height difference.
  • the blanks of the two adjacent material flows can be moved independently of one another on this transport route.
  • Most of the intermediate transport section has a driven conveyor, this is expediently formed by individual conveyors which can be driven independently of one another and are located next to one another.
  • a collecting station 33 or 34 is provided, to which the overlapped blanks of each stream of blanks are transferred independently of one another and are stacked independently of one another in separate, edge-flush stacks, so that each collecting station 33 or 34 has juxtaposed, separate and independently working collection units for the cutting streams.
  • Each overlap unit and the associated collection unit form at least one separately drivable and controllable individual transport track 27, 28 or 29, 30 of the associated transport track 23 or 24. Also useful are the transport sections which follow one another in the conveying direction and belong to the respective overlap unit and the subsequent collection unit formed by separately controllable or drivable individual conveyors.
  • the adjacent individual conveyors of the overlap station 31 have separate drives 35, 36, while the adjacent individual conveyors of the collecting station 33 have separate drives 37, 38.
  • Corresponding separate drives also have the individual conveyors the overlap station 32 and the collecting station 34.
  • the juxtaposed overlap units and / or the juxtaposed individual conveyors or their drives are expediently able to be coupled rigidly to one another via a clutch 39, so that they can also be driven exactly synchronously. In certain cases, this results in higher working accuracy.
  • the sorting device 1 or the sorting cutter of FIG. 2 can also be operated with one use, that is to say that there is no longitudinal cut, but rather the longitudinal cutter 9 is out of operation, without the risk that the respective one, then moved by two individual conveyors lying next to one another , wider cut runs into the overlap section at an angle due to the inaccuracy of these two individual conveyors.
  • a cross conveyor 40 or 41 immediately adjoins each collecting station 33 or 34, on which the cut stacks of the adjacent collection units are transferred independently of one another by their single conveyors and then transversely or at right angles to the direction of conveyance arrow 6, but parallel to the plane the conveyor track can be moved.
  • the two superimposed transverse conveyors 40, 41 of the two transport tracks 23, 24 convey in the same transverse direction, but are expediently offset from one another in the conveying direction arrow 6, as described with reference to the overlapping stations 31, 32 or the collecting stations 33, 34, expedient to achieve the Offset between an overlap station and the associated collecting station a correspondingly lengthened intermediate section is provided.
  • the upper cross conveyor 40 opens laterally adjacent to the transport track 24 or to the overlap station 32 in a lifting device 42, for example a scissor lift table, with which the associated stack of blanks can be lowered from the level of the cross conveyor 40 to the level of the cross conveyor 41.
  • the lowered stacks are transferred to a trans via an intermediate conveyor 44 in the cross-conveying direction Transfer port device 43, which feeds the stacks or sheet packets approximately parallel to the direction of conveyance arrow 6 for further processing.
  • the transport device 43 is expediently located at the level of the collecting station 34 or the cross conveyor 41, which transfers the stacks fed to it directly to the transport device 43 at a point which is offset in the conveying direction with respect to the transfer point by the intermediate conveyor 44.
  • separate, independently operating counting devices 45, 46 and 47, 48 are also provided for the juxtaposed blanking streams.
  • a counter 45 or 46 is expediently provided for the cuts of each stream immediately after the sorting switch 17 in the region of the conveyor 21.
  • Corresponding separate counting devices 47, 48 of a further counting system work before the overlapped blanks are stored in the respective collecting station 33 or 34, so that each collecting unit is assigned a separate counting device.
  • Corresponding separate counting devices can also be provided in the area between the sorting switch 17 and the reject collector 20.
  • the left overlap section is therefore briefly shut down via a corresponding coupling of the drive 36 in order to compensate for the intermediate distance between successive blanks 16, which is increased by the removal of the blank 16 '.
  • the two individual stacks of the respective collecting station 33 and 34 cannot reach their predetermined number of blanks, for example 500 pieces, at the same time, but only successively, by discharging individual blanks, so that they only reach the associated cross conveyor 40 or 41 in succession can be handed over. This is possible due to the separately driven individual conveyors of the collecting stations 33, 34.
  • the Distribution switch 22 this individual switch changed so that the other blanks are deflected onto the transport path 24 and thus fed to the associated collecting unit of the further collecting station 34.
  • the stack located above can be transferred from the collecting station 33 to the associated cross conveyor 40 and passed on to the transport device 43 via the lifting device 42.
  • the device according to the invention is very safe to operate and can be easily manufactured and designed to be space-saving.
  • a cut shredder can be provided for the discharged blanks, which, for example, breaks these blanks into strips as soon as they pass through the associated single diverter or immediately after leaving them, so that Misuse of discharged blanks is prevented in an advantageous manner.
  • the component labeled 20 can be a device for further comminution or destruction of these strips.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Details Of Cutting Devices (AREA)
  • Sorting Of Articles (AREA)
EP90110940A 1989-06-22 1990-06-09 Dispositif de tri pour des éléments plats découpés Expired - Lifetime EP0403901B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920417A DE3920417A1 (de) 1989-06-22 1989-06-22 Sortiereinrichtung fuer flaechige zuschnitte
DE3920417 1989-06-22

Publications (4)

Publication Number Publication Date
EP0403901A2 true EP0403901A2 (fr) 1990-12-27
EP0403901A3 EP0403901A3 (fr) 1992-04-01
EP0403901B1 EP0403901B1 (fr) 1995-05-10
EP0403901B2 EP0403901B2 (fr) 1998-03-25

Family

ID=6383305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110940A Expired - Lifetime EP0403901B2 (fr) 1989-06-22 1990-06-09 Dispositif de tri pour des éléments plats découpés

Country Status (5)

Country Link
US (1) US5235883A (fr)
EP (1) EP0403901B2 (fr)
JP (1) JP2901086B2 (fr)
DE (2) DE3920417A1 (fr)
ES (1) ES2071702T5 (fr)

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WO2008052040A3 (fr) * 2006-10-26 2008-07-03 Align Technology Inc Système et procédé de triage d'articles

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993012027A3 (fr) * 1991-12-16 1993-08-19 Du Pont Appareil et procede destines a separer une feuille d'un alignement de feuilles
US5354047A (en) * 1991-12-16 1994-10-11 E. I. Du Pont De Nemours And Company Method for separating a sheet from an array of sheets conveyed along a vacuum conveyor using diverting nozzles
US5441252A (en) * 1991-12-16 1995-08-15 E. I. Du Pont De Nemours And Company Method for separating and stacking lanes of sheets
AU665603B2 (en) * 1991-12-16 1996-01-11 E.I. Du Pont De Nemours And Company Apparatus and method for separating a sheet from an array of sheets
WO2004103656A1 (fr) * 2003-05-26 2004-12-02 E-Ventures Blechschnittsystem Gmbh Dispositif pour couper transversalement des bandes, notamment en tôle ou en plastique
WO2008052040A3 (fr) * 2006-10-26 2008-07-03 Align Technology Inc Système et procédé de triage d'articles
US8030588B2 (en) 2006-10-26 2011-10-04 Align Technology, Inc. System and method for sorting items
US9152145B2 (en) 2006-10-26 2015-10-06 Align Technology, Inc. System and method for sorting items
US10099256B2 (en) 2006-10-26 2018-10-16 Align Technology, Inc. System and method for sorting items
US10766055B2 (en) 2006-10-26 2020-09-08 Align Technology, Inc. System and method for sorting items
US11247242B2 (en) 2006-10-26 2022-02-15 Align Technology, Inc. System and method for sorting items

Also Published As

Publication number Publication date
ES2071702T5 (es) 1998-07-01
JPH0367854A (ja) 1991-03-22
DE3920417A1 (de) 1991-01-03
EP0403901B1 (fr) 1995-05-10
JP2901086B2 (ja) 1999-06-02
EP0403901A3 (fr) 1992-04-01
EP0403901B2 (fr) 1998-03-25
DE59009045D1 (de) 1995-06-14
ES2071702T3 (es) 1995-07-01
US5235883A (en) 1993-08-17

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