EP0767272A2 - Dispositif pour couper la bande d'enfilement d'une bande de papier - Google Patents

Dispositif pour couper la bande d'enfilement d'une bande de papier Download PDF

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Publication number
EP0767272A2
EP0767272A2 EP19960111142 EP96111142A EP0767272A2 EP 0767272 A2 EP0767272 A2 EP 0767272A2 EP 19960111142 EP19960111142 EP 19960111142 EP 96111142 A EP96111142 A EP 96111142A EP 0767272 A2 EP0767272 A2 EP 0767272A2
Authority
EP
European Patent Office
Prior art keywords
separating
cutting device
support element
strip
strip cutting
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
EP19960111142
Other languages
German (de)
English (en)
Other versions
EP0767272B1 (fr
EP0767272A3 (fr
Inventor
Karlheinz Straub
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.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
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 Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0767272A2 publication Critical patent/EP0767272A2/fr
Publication of EP0767272A3 publication Critical patent/EP0767272A3/xx
Application granted granted Critical
Publication of EP0767272B1 publication Critical patent/EP0767272B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
    • B26D1/28—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting
    • B26D1/285—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/547—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a wire-like cutting member
    • B26D1/5475—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a wire-like cutting member for thin material, e.g. for sheets, strips or the like
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • 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
    • Y10T83/2027—Initiated by means directly responsive to tool movement
    • Y10T83/2029—In return motion of tool
    • 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
    • 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
    • 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
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/472—Wire tool
    • Y10T83/4722—On tool support having reciprocation parallel to direction of work-feed
    • Y10T83/4725—And rotation about axis parallel to direction of work-feed
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9292—Wire tool

Definitions

  • the invention relates to a stripping device for an insertion strip to be threaded in a machine for producing or processing a web, in particular a paper web, and also a method according to the preamble of claim 10.
  • Stripping devices and methods of the type mentioned here are known. They have at least one guide plate, with the aid of which the web or the insertion strip is transferred when the machine starts up or after a web break. In order to separate the web running before the transfer into a collecting area, separating devices are provided in the swiveling range of a guide plate passing the web, which have, for example, two interacting knife edges which knock off the running web and enable it to be taken over.
  • the separating device has at least one flexible separating element, the risk of injury when the web or papermaking machine is at a standstill is practically completely eliminated. Even in the operation of the strip cutting device, there is a significant reduction in the risk of injury, since the separating device acts on the web or the insertion strip on its own, i.e. it has no counter element, as is the case in the prior art where there are two interacting knife edges.
  • An exemplary embodiment of the stripping device is preferred, which is characterized in that the separating element is designed to be flexible in itself.
  • the special design of the separating element already minimizes the risk of injury.
  • the stripping device can therefore be designed to be very simple and reliable, but also relatively safe.
  • the stripping device in which the separating element is flexibly attached to a support element.
  • the separating element can therefore perform an evasive movement carry out so that the risk of injury can be reduced to a minimum.
  • An exemplary embodiment of the stripping device is also preferred, which is characterized in that the separating device has at least one separating element which can be displaced into a rest position, and the risk of injury can thereby be substantially reduced.
  • the separating elements In the rest position, the separating elements are arranged in such a way that injury to operators is practically impossible. However, the separating elements can be shifted from this rest position into a working position in which an insertion strip running off the guide plate is knocked off.
  • the stripping device in which the separating element is designed as an elongated plastic thread, one end of which is attached to a rotatable support element and the distal end of which, facing away from the support element, can be displaced from a rest position into a working position.
  • the thread end does not pose any risk of injury to operators when the support element is at a standstill. Even when the separating device is in operation, the risk of injury is reduced by the fact that the free-standing end, which knocks off the insertion strip, can deflect when it hits the surface of an operator's body, so that at least serious injuries are avoided can.
  • FIG. 1 shows three functional positions of a strip chopping device, hereinafter briefly referred to as device 1, which here cooperates with a transfer device which has a guide plate 3, also referred to as a table plate, which can be pivoted on a scraper bar 5 of a machine for manufacturing or processing, which is only indicated here a web, in particular paper web, is attached.
  • a material web 9 running off a roller 7 can be seen from the illustration.
  • an insertion strip is cut from the material web 9, which is to be guided through the machine, in a known manner. As soon as the insertion strip is completely guided through the machine, the width of the material web is reduced to the desired dimension, namely to the total width.
  • receiving or guide devices 11 are provided, which serve to take over the material web or the insertion strip.
  • Two baffles 13 and 15 are indicated here purely by way of example.
  • a separating device 19 is provided, which serves to separate the material web 9 during a transfer operation.
  • the material web 9 runs along and down the guide plate 3, as indicated by an arrow 21.
  • the guide plate is pivoted clockwise from its initial position shown in the uppermost partial illustration with the aid of a pivoting device 23.
  • the material web 9 running from the free end 25 of the guide plate 3 reaches the effective area of the separating device 19 and is thereby knocked off.
  • the guide plate 3 is in a transition position in which the material web 9 is being separated.
  • the guide plate 3 is pivoted beyond this position, so that the material web 9 reaches the area of the receiving or guide device 11, where it is initially taken over by the guide plate 15.
  • blowing devices 27 which are known per se, can be provided, as only indicated here, so that their functional description is dispensed with here.
  • the baffle 3 remains in the position shown in the bottom view in Figure 1 until the Material web 9 is taken over by a subsequent roller (not shown here) of the manufacturing or processing machine.
  • the guide plate 3 can then be pivoted back into its starting position shown in FIG. 1 above. It is then also possible to inactivate the separating device 19 and the blowing devices 27.
  • belt devices can also be provided, the belt surfaces of which face the material web 9 and move in the transport direction of the material web.
  • a belt device is shown in Figure 2.
  • the mode of operation corresponds to that of the guide plates explained with reference to FIG. 1.
  • a tape device 15 ' can thus be seen from FIG. 2, which is used to receive and pass on the material web 9 transferred from the guide plate 3.
  • An arrow 29 in FIG. 2 shows the direction of movement of the strand 31 of the belt device 15 'which receives and guides the material web 9.
  • a separating device 19 Arranged at the end 17 ′ of the belt device 15 ′ facing the guide plate 3 is a separating device 19, shown in FIG.
  • Two opposite separating elements 41 and 43 are attached to the support element 33 here.
  • the first end of the separators is suitably attached to the support member 33, while the second, distal End protrudes beyond the outer boundary surface of the support member 33 when and while the support member 33 rotates.
  • weights 45 and 47 are provided at the distal end.
  • FIG. 3 again shows a part of a receiving or guiding device, which here also comprises a belt device 15 'instead of a guiding plate explained with reference to FIG. 1, onto which the material web 9 is applied by the table or guiding plate 3.
  • two separating devices 19 are provided at the end 17 ′ of the belt device 15 ′ facing the guide plate 3, which are designed in a quasi-mirror image: to the side of the strand 31 receiving the material web, 35 motors are provided as drives, each of which has a supporting element 33 rotate.
  • the support elements 33 are located within the lateral boundary edges of the run 31. In the embodiment shown here, the support elements are driven in opposite directions.
  • Both support elements 33 are in turn each provided with two separating elements 41 and 43, which are provided with weights 45 and 47 at their ends facing away from the support element 33.
  • the illustration in FIG. 3 also shows the separating devices 19 in operation. This means that the separating elements 41 and 43 are practically perpendicular to the axis of rotation 39 of the support elements 33.
  • FIGS. 2 and 3 thus show the separating elements 41 and 43 in their working position in which they are one knock off the material web 9 transferred from the guide plate 3.
  • the rest position 49 of a separating element is shown in broken lines in the left separating device: the weight 45 bends the separating element 41 downward, following gravity.
  • the separating elements are all designed such that they assume the rest position 49 indicated here when the supporting elements 33 are at a standstill.
  • FIG. 4 shows only part of a separating device, namely a support element 33 for separating elements, it should be explained that other embodiments of separating elements can also be used:
  • a separating element 41 is attached to the right side of the support element 33, which, as explained with reference to FIGS. 2 and 3, has a weight 45 at its distal end.
  • the working position of the separating element 41 is drawn in with solid lines. With dotted lines its rest position 49.
  • the separating element 41 consists of an elastic material.
  • rigid separating elements 41 ' which are suitably pivotably attached to the supporting element 33.
  • the separating element 41 ' likewise carries a weight 45' at its distal end remote from the supporting element 33.
  • the separating element 41 which is made of an elastic material and is bent downwards by the weight 45 when the supporting element 33 is at a standstill.
  • the separating element 41 is formed from such a resilient, resilient material that it is not bent downward when the supporting element 33 is at a standstill, but instead remains in its working position due to its material rigidity.
  • the separating device 19 explained with reference to FIGS. 1 to 4 does not pose any risk of injury to an operator when the support element 33 is at rest.
  • the separating elements 41 and 41 ' which can also have sharp edges at their ends, are then pivoted into their rest positions 49 and 49', respectively, and thus protrude only slightly beyond the outer boundary surface of the supporting element 33.
  • the ends of the Separators 41 and 41 ' are movable relative to the support member 33 so that they can perform an evasive movement when an operator touches them.
  • This evasive movement is also carried out by the separating element 49, which is always in its working position and which, owing to its material properties, has sufficient flexibility and at the same time has such a stiffness that it does not bend due to its own weight - following gravity.
  • Plastic has proven itself as the base material for the separating elements 41 and 43. It is also possible to use wires or wire ropes which are so elastic that the separating elements, in particular if they are provided with a weight at their ends, are bent downwards when the supporting element is at a standstill, so that there is practically no risk of injury.
  • the length of the support elements 41 and 43 or 41 ' can be varied very easily without it being necessary to change the design of the separating elements themselves. This allows the working width of the separating elements to be varied slightly.
  • Separating devices are particularly preferred in which the number of separating elements is selected such that an imbalance is avoided. It is also conceivable to mount a corresponding counterweight on the support element 33 in the case of separating devices with a single separating element in order to avoid imbalance.
  • the rigidity of the separating elements and the size of the weight provided at the end of the separating element can be adapted to the material web properties. It is conceivable that the weight can be dispensed with in the case of very light paper webs. In the case of heavier webs, the weights, which are otherwise provided without any cutting edges, can be formed with sharp edges on their radially outer side in order to increase the tee-off effect. In this case, too, the risk of injury remains reduced for operators, even when the separating device is in operation, because no fixed knives are used here. Due to their flexibility, that is to say because of the elasticity of the separating elements or because of the pivotable suspension, the ends of the separating elements can still perform an evasive movement when they strike the body surface of an operator.
  • the support element 33 shown in FIG. 4 can be modified as follows :
  • radially extending recesses can be made in the base body of the support element, into which separating elements are inserted. These can be anchored to the support element by a spring-elastic element which acts on the separating elements with a retraction force. If the support element is set in rotation, the separating elements can emerge from the recesses against the retraction force and knock off a material web that is guided past the support element. In the retracted position, the separating elements can pose no risk of injury to operators, so that there is a high level of operating safety.
  • This advantage also results from a method for knocking off an insertion strip to be threaded in a machine for producing or processing a web, in particular a paper web, which is characterized in that the entry strip is knocked off with the aid of a flexible separating element of a separating device. Squeezing or injury to the operator between two interacting knife edges is excluded. Other knives acting on the lead-in strip without a counter element can also be omitted, since the flexible separating element reliably knocks off an lead-in strip.
  • the flexible separating elements used can either be flexible or elastic, or are flexible, for example pivotable, suspended.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Replacement Of Web Rolls (AREA)
EP19960111142 1995-10-06 1996-07-11 Dispositif pour couper la bande d'enfilement d'une bande de papier Expired - Lifetime EP0767272B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537173 1995-10-06
DE1995137173 DE19537173C1 (de) 1995-10-06 1995-10-06 Streifenabschlageinrichtung

Publications (3)

Publication Number Publication Date
EP0767272A2 true EP0767272A2 (fr) 1997-04-09
EP0767272A3 EP0767272A3 (fr) 1997-05-07
EP0767272B1 EP0767272B1 (fr) 1999-09-29

Family

ID=7774137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960111142 Expired - Lifetime EP0767272B1 (fr) 1995-10-06 1996-07-11 Dispositif pour couper la bande d'enfilement d'une bande de papier

Country Status (5)

Country Link
US (1) US5799556A (fr)
EP (1) EP0767272B1 (fr)
CN (1) CN1152535A (fr)
CA (1) CA2187237A1 (fr)
DE (2) DE19537173C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045141A1 (de) * 2000-09-13 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zum Überführen eines Streifens einer flexiblen Materialbahn

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905073A1 (fr) * 1997-09-23 1999-03-31 Solutia Europe N.V./S.A. Dispositif automatique pour couper et empiler de pièces formées et procédé d'utilisation
DE19910567A1 (de) * 1999-03-10 2000-11-09 Voith Sulzer Papiertech Patent Verfahren zum Aufwickeln einer Materialbahn sowie Wickelmaschine zur Durchführung des Verfahrens
DE19910581A1 (de) * 1999-03-10 2000-09-14 Voith Sulzer Papiertech Patent Linear-Antriebs-Aggregat
NL1031597C2 (nl) * 2006-04-13 2007-10-16 Fuji Seal Europe Bv Inrichting voor het uit een strook hoesvormig foliemateriaal vervaardigen van hoesvormige folie-omhullingen.
NL1033245C2 (nl) * 2007-01-17 2008-07-18 Fuji Seal Europe Bv Inrichting voor het uit een strook hoesvormig foliemateriaal vervaardigen van hoesvormige folie-omhullingen.
DE102007053700A1 (de) 2007-11-10 2009-05-14 Andritz Küsters Gmbh Vorrichtung zum Überführen einer flexiblen Materialbahn, insbesondere einer Papier- oder Kartonbahn
CN104003238B (zh) * 2014-05-30 2016-09-14 济南米铎碳新能源科技有限公司 一种切割机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141156A1 (fr) * 1983-09-13 1985-05-15 Gebr. Bellmer GmbH & Co. KG Dispositif pour séparer une bande continue de papier sur une machine à papier
EP0554339A1 (fr) * 1990-10-24 1993-08-11 Fibron Machine Corp Appareil de coupe de queue de papier a couteaux a contra-rotation.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062114A (en) * 1976-05-07 1977-12-13 Woodrow Wilson Luick Vegetation cutting apparatus
US4086700A (en) * 1976-07-13 1978-05-02 Elta Machine Industrial Co., Ltd. Cutting head for a mower
US4084469A (en) * 1976-12-17 1978-04-18 Herbert Ray Gray Web cutting device
US4171724A (en) * 1978-02-13 1979-10-23 Steele Frank B Tool for lawn edging machine
US4905465A (en) * 1989-05-08 1990-03-06 Trim-A-Lawn Corporation Rotary cutting member for use with lawn mowers and the like
DE4409660A1 (de) * 1994-03-21 1994-08-18 Voith Gmbh J M Streifenabschlag- und Überführeinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141156A1 (fr) * 1983-09-13 1985-05-15 Gebr. Bellmer GmbH & Co. KG Dispositif pour séparer une bande continue de papier sur une machine à papier
EP0554339A1 (fr) * 1990-10-24 1993-08-11 Fibron Machine Corp Appareil de coupe de queue de papier a couteaux a contra-rotation.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045141A1 (de) * 2000-09-13 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zum Überführen eines Streifens einer flexiblen Materialbahn

Also Published As

Publication number Publication date
EP0767272B1 (fr) 1999-09-29
CN1152535A (zh) 1997-06-25
CA2187237A1 (fr) 1997-04-07
US5799556A (en) 1998-09-01
DE59603214D1 (de) 1999-11-04
DE19537173C1 (de) 1996-12-19
EP0767272A3 (fr) 1997-05-07

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