EP0629173B1 - Device for cutting a cover layer from a material roll - Google Patents
Device for cutting a cover layer from a material roll Download PDFInfo
- Publication number
- EP0629173B1 EP0629173B1 EP93905721A EP93905721A EP0629173B1 EP 0629173 B1 EP0629173 B1 EP 0629173B1 EP 93905721 A EP93905721 A EP 93905721A EP 93905721 A EP93905721 A EP 93905721A EP 0629173 B1 EP0629173 B1 EP 0629173B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- cutting
- material roll
- rotation
- carrier
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0033—Unpacking of articles or materials, not otherwise provided for by cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/02—Supporting web roll
- B65H16/08—Supporting web roll parallel rollers type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/10—Arrangements for effecting positive rotation of web roll
- B65H16/106—Arrangements for effecting positive rotation of web roll in which power is applied to web roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
- B65H19/105—Opening of web rolls; Removing damaged outer layers; Detecting the leading end of a closed web roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
- B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2405/00—Parts for holding the handled material
- B65H2405/40—Holders, supports for rolls
- B65H2405/42—Supports for rolls fully removable from the handling machine
- B65H2405/422—Trolley, cart, i.e. support movable on floor
Definitions
- the present invention relates to a device for cutting a protective layer away from a material roll of web-formed material, comprising a rotation device intended to rotate the roll, whereby the rotation device includes at least two rotatable carrier rollers, on which the material roll is supported and is arranged to rotate, whereby the protective layer on the material roll is cut away from the roll during a cutting operation by means of a cutting tool which is arranged to contact the roll during its rotation.
- a packaging in form of one or more protective layers on the end faces of the roll or covering layers of a strong material, for example coarse paper.
- a strong material for example coarse paper.
- the object of the present invention is to facilitate the procedure with removal of the protective layer from material rolls.
- a device which is characterized in that said rotatable carrier rollers form lifting and carrying means on a mobile load carrier in order to support the material roll whilst rotating it during the cutting operation and to transport the material roll to and, respectively, from a chosen place for the cutting operation.
- Fig. 1 shows a perspective view of the arrangement according to the invention
- Fig. 2 in an end view, shows a particular embodiment with a stationary part as well as the mobile parts shown in Fig. 1 of the device in a position for cutting away the protective layer from a material roll.
- the device according to the invention in a developed embodiment, can consist of a stationary unit 1 and a mobile unit 2.
- the stationary unit is formed from a stationary cutting device which is fixedly attached onto a floor 3 and supports a cutting tool in the form of a knife unit 4, which projects sidewardly from a stand with a control and drive unit 5 for the cutting device 1.
- the knife unit 4 is for instance movably arranged relative to the control and drive unit 5 for giving controlled movement between a retracted position, for example retracted to a hidden position inside the unit 5, and a projecting cutting position shown in Fig. 2 and possibly also movable sideways, i.e. essentially horizontally.
- the cutting edge 6 of the knife unit extends preferably in a vertical plane or at a small angle to this.
- the mobile unit 2 is built like a mobile load carrier, for example like a so-called auto carrier i.e. a self-driven self-controlled load vehicle which moves between determined positions.
- the vehicle can either follow a predetermined path, choose between several different predetermined paths or be programmed to choose by itself suitable routes between stations.
- the freedom of movement of the mobile unit is dependent on the chosen technique for controlling the unit.
- a commonly occurring control technique is based on fixedly inlaid control loops in the floor, whilst a more flexible solution is constituted by a previously known navigation system which is based on a rotating laser carried by the vehicle, which detects the reflections from fixed reflection points in the premises. By measuring the laser beam's angle relative to a reference line in the horizontal plane during reflection from at least two reflection points, the position can be determined and the vehicle controlled according to a chosen path by means of control equipment.
- the mobile unit 2 is made up of a wagon 7 with at least three wheels 8, 9 and 10, of which at least one constitutes a steering wheel which is controlled by means of the automatic control equipment.
- the steering wheel 10 or any of the other wheels 8, 9 serve(s) as a drive wheel which is driven by a drive motor for displacement of the wagon 7 with the desired speed and for starting and stopping in chosen positions.
- the wagon presents a lifting device 11 in the form of a so-called forklift in which the lifting device is designed as a raisable and lowerable unit, movable along a guide 12.
- the lifting device 11 presents two lifting and carrying members 13, 14, which are formed by two carrying rollers.
- the carrying rollers 13, 14 thereby form, in the shown example, fork legs positioned essentially parallel to each other and at a suitable respective distance such that they can support and rotate a roll 16 of continuous material web, e.g. paper.
- the roll is essentially cylindrical with a cylindrical outer surface 17 and two end faces 18.
- the roll normally presents a central core 19 in the form of a tube on which the material web is rolled up.
- the roll 16 is completely or partially enclosed in a protective layer which surrounds at least the end faces 18 and is normally made from a layer of strong paper.
- the protective layer can even cover the outer surface 17 completely or partially.
- the most common form of the protective layer is a sheet of paper attached on each one of the end faces, said sheet of paper being folded with a part over the roll's circular edge 22, 23 and glued against the cylinder outer surface 17. It is normally sufficient that the sheet extends a few centimetres over onto the cylindrical surface.
- the carrying rollers 13, 14 present a suitable, relatively small diameter and necessary length in order to be able to be inserted on either side of the support surface of the material roll on a base. With the above shown dimension and respective distance it is realised that the roll is collected from a level above the base 3, for example on a cradle or similar.
- the crab 15 can also be arranged such that both carrier rollers 13, 14 are movable sideways with respect to each other, preferably by means of a highly geared drive motor, whereby the carrying rollers can be adapted to different dimensions of material rolls which are to be lifted.
- the crab 15 further presents a drive motor for rotation of one or both of the carrying rollers 13, 14 so that after activation they can be made to rotate around their longitudinal axis 20 for rotation of the material roll 17 around its geometrical longitudinal axis 21.
- This rotation can be activated either manually by means of a manoeuvring member on the mobile unit 2 or remotely controlled via control and drive unit 5 or a non-depicted central computer in the material handling system.
- the idea with the arrangement according to the invention is thus to remove the protective layer, i.e. the packaging, from the material roll in an efficient manner.
- the protective layer should be removed from the end surfaces 18, which occurs in the following manner:
- the material roll 16 is carried into position by means of the mobile unit 2 from a warehouse, production site or similar, to the cutting position shown in Fig. 2, whereupon the rotation device is activated. This activation can occur shortly before or when the mobile unit 2 is located at the position shown in Fig. 2 close to the cutting device 1, whereby also the knife unit is activated to contact the periphery 17 of the material roll 16 and to penetrate the outer surface at one edge portion 22, 23 at a time.
- the packaging of the material roll 16 is made of a strong material, for example coarse paper in one or more layers, which thus shall be removed from the roll on the end faces 18 before the material web can be unrolled from this.
- Cutting open of the packaging by means of the cutting device 1 is achieved when the material roll 16 rotates whilst the knife unit 6 is made to penetrate through the packaging. This occurs with the mobile unit 2 and the knife unit 6 standing still in the position shown in fig. 2.
- the knife unit is started and is held as near as possible to the edge portions 22, 23 of the material roll, whereby a purely annular complete cutline is achieved which thus cuts off the packaging over the end part of the roll.
- the knife unit After a movement of either the knife unit or the mobile unit in the longitudinal direction of the roll, the knife unit is placed against the other end part, whereafter the roll is rotated and the packaging at the other end face is cut off in a similar manner whereby the protection layer falls down or is removed by hand.
- the mobile unit 2 can be activated in order to move to the next station and thus take with it the material roll without any load transfer procedure.
- the invention is not limited to the embodiments described above and shown in the drawings, but can be varied within the scope of the appended claims.
- the drive means can consist of a drive roll which lies against the periphery of the roll or eccentrically against one end surface.
- a drive axle with engagement means can alternatively be coupled to the centre of the roll.
- the stationary unit 1 can be replaced by a person holding a cutting tool such as a knife in a manner which corresponds to that described above, i.e. during rotation of the roll on the mobile unit. In this way any suitable position whatsoever can be chosen for the cutting operation.
- the knife unit can be made to perform a sideways movement along the roll during its rotation whereby a spiral-formed cutline is obtained and the protective layer can be removed.
- the carrier members 13, 14 are made from several shorter rollers which are rotatably carried on the lifting forks of the mobile unit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Replacement Of Web Rolls (AREA)
- Advancing Webs (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
- The present invention relates to a device for cutting a protective layer away from a material roll of web-formed material, comprising a rotation device intended to rotate the roll, whereby the rotation device includes at least two rotatable carrier rollers, on which the material roll is supported and is arranged to rotate, whereby the protective layer on the material roll is cut away from the roll during a cutting operation by means of a cutting tool which is arranged to contact the roll during its rotation.
- For transport and storage of material rolls comprising web-formed material, for example paper, these are provided, in connection with manufacture, with a packaging in form of one or more protective layers on the end faces of the roll or covering layers of a strong material, for example coarse paper. Before the roll of web-formed material contained in the packaging is used, e.g. in the graphics industry, packaging industry etc., the protective layer is removed before the web material can be unrolled.
- It is known in the art (see document US-A-4821971) to remove the protective layer from material rolls by the material roll being transported to a station for so-called roll-stripping, whereby the roll is normally transported by means of a truck, unloaded to a rotation device at the station and whereupon by means of a knife the packaging is cut open during rotation of the roll. After removal of the packaging the material roll is again loaded onto a suitable load carrier for further transport to a following station for unrolling of the web-formed material. The actual removal of the protective layer is a relatively fast procedure, whilst the total procedure is however lengthened unfavourably by an unloading procedure both before and after the removal of the protective layer.
- The object of the present invention is to facilitate the procedure with removal of the protective layer from material rolls.
- Said object is achieved by means of a device according to the present invention, which is characterized in that said rotatable carrier rollers form lifting and carrying means on a mobile load carrier in order to support the material roll whilst rotating it during the cutting operation and to transport the material roll to and, respectively, from a chosen place for the cutting operation.
- The invention will be described more closely with reference to an embodiment and to the accompanying drawings, in which Fig. 1 shows a perspective view of the arrangement according to the invention, whilst Fig. 2, in an end view, shows a particular embodiment with a stationary part as well as the mobile parts shown in Fig. 1 of the device in a position for cutting away the protective layer from a material roll.
- The device according to the invention, in a developed embodiment, can consist of a
stationary unit 1 and amobile unit 2. The stationary unit is formed from a stationary cutting device which is fixedly attached onto a floor 3 and supports a cutting tool in the form of aknife unit 4, which projects sidewardly from a stand with a control anddrive unit 5 for thecutting device 1. Theknife unit 4 is for instance movably arranged relative to the control and driveunit 5 for giving controlled movement between a retracted position, for example retracted to a hidden position inside theunit 5, and a projecting cutting position shown in Fig. 2 and possibly also movable sideways, i.e. essentially horizontally. Thecutting edge 6 of the knife unit extends preferably in a vertical plane or at a small angle to this. - The
mobile unit 2 is built like a mobile load carrier, for example like a so-called auto carrier i.e. a self-driven self-controlled load vehicle which moves between determined positions. The vehicle can either follow a predetermined path, choose between several different predetermined paths or be programmed to choose by itself suitable routes between stations. The freedom of movement of the mobile unit is dependent on the chosen technique for controlling the unit. A commonly occurring control technique is based on fixedly inlaid control loops in the floor, whilst a more flexible solution is constituted by a previously known navigation system which is based on a rotating laser carried by the vehicle, which detects the reflections from fixed reflection points in the premises. By measuring the laser beam's angle relative to a reference line in the horizontal plane during reflection from at least two reflection points, the position can be determined and the vehicle controlled according to a chosen path by means of control equipment. - The
mobile unit 2 is made up of awagon 7 with at least threewheels steering wheel 10 or any of theother wheels wagon 7 with the desired speed and for starting and stopping in chosen positions. The wagon presents alifting device 11 in the form of a so-called forklift in which the lifting device is designed as a raisable and lowerable unit, movable along a guide 12. Thelifting device 11 presents two lifting and carryingmembers vertical crab 15 which by means of a non-depicted drive mechanism is movable vertically along the guide 12. Thecarrying rollers roll 16 of continuous material web, e.g. paper. The roll is essentially cylindrical with a cylindrical outer surface 17 and two end faces 18. The roll normally presents acentral core 19 in the form of a tube on which the material web is rolled up. Theroll 16 is completely or partially enclosed in a protective layer which surrounds at least theend faces 18 and is normally made from a layer of strong paper. The protective layer can even cover the outer surface 17 completely or partially. The most common form of the protective layer is a sheet of paper attached on each one of the end faces, said sheet of paper being folded with a part over the roll'scircular edge - The
carrying rollers crab 15 can also be arranged such that bothcarrier rollers crab 15 further presents a drive motor for rotation of one or both of thecarrying rollers longitudinal axis 20 for rotation of the material roll 17 around its geometricallongitudinal axis 21. This rotation can be activated either manually by means of a manoeuvring member on themobile unit 2 or remotely controlled via control anddrive unit 5 or a non-depicted central computer in the material handling system. - The idea with the arrangement according to the invention is thus to remove the protective layer, i.e. the packaging, from the material roll in an efficient manner. In this example it is required that the protective layer should be removed from the
end surfaces 18, which occurs in the following manner: Thematerial roll 16 is carried into position by means of themobile unit 2 from a warehouse, production site or similar, to the cutting position shown in Fig. 2, whereupon the rotation device is activated. This activation can occur shortly before or when themobile unit 2 is located at the position shown in Fig. 2 close to thecutting device 1, whereby also the knife unit is activated to contact the periphery 17 of thematerial roll 16 and to penetrate the outer surface at oneedge portion material roll 16 is made of a strong material, for example coarse paper in one or more layers, which thus shall be removed from the roll on the end faces 18 before the material web can be unrolled from this. Cutting open of the packaging by means of thecutting device 1 is achieved when thematerial roll 16 rotates whilst theknife unit 6 is made to penetrate through the packaging. This occurs with themobile unit 2 and theknife unit 6 standing still in the position shown in fig. 2. The knife unit is started and is held as near as possible to theedge portions - After finishing cutting of the packaging, the
mobile unit 2 can be activated in order to move to the next station and thus take with it the material roll without any load transfer procedure. - The invention is not limited to the embodiments described above and shown in the drawings, but can be varied within the scope of the appended claims. For example it is imaginable that the actual driven rotation of the roll occurs by way of drive means which is connected to a drive motor in the
stationary unit 1. The drive means can consist of a drive roll which lies against the periphery of the roll or eccentrically against one end surface. A drive axle with engagement means can alternatively be coupled to the centre of the roll. In a simpler embodiment, thestationary unit 1 can be replaced by a person holding a cutting tool such as a knife in a manner which corresponds to that described above, i.e. during rotation of the roll on the mobile unit. In this way any suitable position whatsoever can be chosen for the cutting operation. For cutting of a roll completely or only of the packaging surrounding the outer surface, the knife unit can be made to perform a sideways movement along the roll during its rotation whereby a spiral-formed cutline is obtained and the protective layer can be removed. - In practice the
carrier members
Claims (9)
- Device for cutting a protective layer away from a material roll (16) of web-formed material, comprising a rotation device (13, 14) intended to rotate the roll (16), whereby the rotation device includes at least two rotatable carrier rollers (13, 14), on which the material roll (16) is supported and is arranged to rotate, whereby the protective layer on the material roll (16) is cut away from the roll (16) during a cutting operation by means of a cutting tool (4) which is arranged to contact the roll during its rotation, characterized in that said rotatable carrier rollers (13, 14) form lifting and carrying means on a mobile load carrier (7) in order to support the material roll (16) whilst rotating it during the cutting operation and to transport the material roll (16) to and, respectively, from a chosen place for the cutting operation.
- Device according to claim 1, characterized in that said carrier rollers (13, 14) are raisable and lowerable by means of a raisable and lowerable lifting arrangement (11) on the load carrier (7).
- Device according to claim 1, characterized in that said carrier rollers (13, 14) are arranged parallel to each other and are adjustable with regard to their mutual distance.
- Device according to any one of the preceding claims, characterized in that said carrier rollers (13, 14) are each rotatably arranged in their respective fork leg on a forklift (11).
- Device according to claim 4, characterized in that at least one carrier roller (13, 14) is connected to a drive motor on the mobile load carrier (7) for rotation of said carrier roller.
- Device according to claim 1, characterized in that said cutting tool (4) is supported by a cutting device which forms a stationary unit (1) to which, respectively from which, the mobile unit (7) is displaced.
- Device according to any one of the preceding claims, characterized in that said load carrier is constituted by an autocarrier included in an automatic load handling system, and in that the autocarrier is arranged to be placed into a cutting position, in which said cutting tool (4) is arranged to contact the roll's periphery.
- Device according to claim 6, characterized in that said rotation device (13, 14) comprises a stationary drive motor arranged, in said cutting position, to position a drive member against the material roll in order to effect its rotation.
- Device according to claim 8, characterized in that said drive motor is constituted by a drive roller in the form of a friction roller arranged to contact the periphery of the material roll (16).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9200625A SE9200625D0 (en) | 1992-03-02 | 1992-03-02 | DEVICE FOR CUTTING MATERIAL FROM A MATERIAL ROLL |
SE9200625 | 1992-03-02 | ||
SE9202712 | 1992-09-21 | ||
SE9202712A SE500407C2 (en) | 1992-03-02 | 1992-09-21 | Apparatus for cutting protective layers from a roll of material |
PCT/SE1993/000160 WO1993017946A1 (en) | 1992-03-02 | 1993-02-26 | Device for cutting a cover layer from a material roll |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0629173A1 EP0629173A1 (en) | 1994-12-21 |
EP0629173B1 true EP0629173B1 (en) | 1997-04-23 |
Family
ID=26661345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93905721A Expired - Lifetime EP0629173B1 (en) | 1992-03-02 | 1993-02-26 | Device for cutting a cover layer from a material roll |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0629173B1 (en) |
JP (1) | JPH07504387A (en) |
AT (1) | ATE152073T1 (en) |
AU (1) | AU3653893A (en) |
DE (1) | DE69310157T2 (en) |
DK (1) | DK0629173T3 (en) |
SE (1) | SE500407C2 (en) |
WO (1) | WO1993017946A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI3907U1 (en) | 1999-01-13 | 1999-04-13 | Valmet Corp | Valsbox |
DE20004496U1 (en) * | 2000-03-14 | 2000-07-06 | K N O L L E K Metall Und Speng | Transport and unwinding device for tapes |
DE502004005609D1 (en) * | 2004-09-03 | 2008-01-10 | Metso Paper Ag | Storage and retrieval device and system for preparing and storing paper rolls and feeding them to at least one roll stand and method for their operation |
FI118593B (en) | 2005-03-03 | 2008-01-15 | Jaakko Maekinen | Device for cutting a rolled web |
ITUA20162971A1 (en) * | 2016-04-28 | 2017-10-28 | Salmoiraghi S P A | INERTIAL DRIVE MOBILE DEVICE TO DOWNLOAD COILS LOADS FROM A WINDING MACHINE |
SE542363C2 (en) * | 2017-02-22 | 2020-04-14 | Core Link Ab | Method and apparatus for removing wrapping from rolls |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2337663C2 (en) * | 1973-07-25 | 1986-12-11 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Device for preparing reels of web material for unwinding for printing |
CH618139A5 (en) * | 1977-05-17 | 1980-07-15 | Cilander Ag | Winding appliance for winding a web-shaped sheet-like structure onto a winding core |
US4821971A (en) * | 1988-03-17 | 1989-04-18 | Kabushiki Kaisha Kaneda Kikai Seisakusho | Device for peeling and cutting off surface portions of paper rolls |
US4863335A (en) * | 1988-03-25 | 1989-09-05 | Haines & Emerson, Inc. | Automatic guided vehicle roll-handling system |
US4948060A (en) * | 1988-09-12 | 1990-08-14 | Butler Automatic, Inc. | Automatic web roll handling system for splicing |
JPH0542913A (en) * | 1991-07-26 | 1993-02-23 | Ishida Scales Mfg Co Ltd | Packing apparatus |
-
1992
- 1992-09-21 SE SE9202712A patent/SE500407C2/en unknown
-
1993
- 1993-02-26 WO PCT/SE1993/000160 patent/WO1993017946A1/en active IP Right Grant
- 1993-02-26 JP JP5515580A patent/JPH07504387A/en active Pending
- 1993-02-26 EP EP93905721A patent/EP0629173B1/en not_active Expired - Lifetime
- 1993-02-26 DK DK93905721.2T patent/DK0629173T3/en active
- 1993-02-26 AT AT93905721T patent/ATE152073T1/en active
- 1993-02-26 AU AU36538/93A patent/AU3653893A/en not_active Abandoned
- 1993-02-26 DE DE69310157T patent/DE69310157T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07504387A (en) | 1995-05-18 |
ATE152073T1 (en) | 1997-05-15 |
SE9202712D0 (en) | 1992-09-21 |
AU3653893A (en) | 1993-10-05 |
DK0629173T3 (en) | 1997-11-03 |
DE69310157T2 (en) | 1997-11-27 |
SE500407C2 (en) | 1994-06-20 |
SE9202712L (en) | 1993-09-03 |
DE69310157D1 (en) | 1997-05-28 |
WO1993017946A1 (en) | 1993-09-16 |
EP0629173A1 (en) | 1994-12-21 |
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