EP0608337A1 - Reel for roll material - Google Patents
Reel for roll materialInfo
- Publication number
- EP0608337A1 EP0608337A1 EP92922018A EP92922018A EP0608337A1 EP 0608337 A1 EP0608337 A1 EP 0608337A1 EP 92922018 A EP92922018 A EP 92922018A EP 92922018 A EP92922018 A EP 92922018A EP 0608337 A1 EP0608337 A1 EP 0608337A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- coupling elements
- roller carrier
- wound
- roller
- 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.)
- Withdrawn
Links
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
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/04—Kinds or types
- B65H75/08—Kinds or types of circular or polygonal cross-section
- B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
Definitions
- the invention relates to a roller carrier, on the circumferential surface of which a strip of material can be wound, and which has coupling elements at the end for connection to a winding drive.
- roller carrier can be found, for example, in US Pat. No. 4,754,537.
- An end cap is inserted in both ends of a tube and has a square opening for connection to a drive shaft.
- the roller carrier is particularly intended for textiles and therefore has a greater length, for example of two meters.
- a cardboard tube in multiples of its later length is usually pushed onto a driven winding core or mandrel of a winding machine and fixed there, in particular expanded. Relatively complicated mechanisms are known for this.
- the roll carrier wound with several material tapes is then detached from the winding core, pulled off and cut to length. As soon as the wound material tape is used up, the empty cardboard tube is thrown away.
- the cardboard tubes are wound helically from several layers of paper. Overall, this results in a relatively complex, labor-intensive and cost-intensive production of both the roller carriers and the wound rollers.
- the invention has now set itself the task of eliminating this disadvantage and proposes for narrow strips of material such as toilet paper or the like.
- a role Carrier in which the end coupling elements are designed so that several roller carriers can be assembled to form a winding core that winds several material strips simultaneously.
- the previous cardboard tubes are saved and connecting devices between the winding cores and the roll carriers are dispensed with.
- the individual rolls can be pulled off one another.
- the roll carriers according to the invention are in particular made of plastic, for example injection molded, so that the coupling elements required for connection to one another and for connection to the winding drive can be shaped. This also makes it possible to achieve a smaller diameter of the roller carrier than with wound ones
- Cardboard sleeves are possible, so that a much longer strip of material has space on the same roll diameter. Depending on the material value of the roll carrier, these can, if necessary, also be thrown away when the material band has been used up, but it is preferred to reuse the roll carrier.
- dispensers are often used, in which at least two such rolls can be accommodated. After the first role has been used up, a second one is available which slides into the use position in guides.
- a preferred embodiment suitable for this provides that both
- Coupling elements protrude axially over the circumference and form guide or bearing journals.
- the use of the rolls in the dispensers mentioned also makes it easier to collect the empty roll carriers for reuse, since they are located in a collecting area of the dispenser. let it collect. They are plugged together and attached to the drive of the winding device as the winding core.
- At least one coupling element has resilient residual elements.
- FIG. 1 shows a first embodiment of a roll carrier in longitudinal section
- FIG. 2 shows a winding core composed of several roll carriers according to FIG. 1, also in longitudinal section
- FIG. 3 shows a second embodiment of a roller carrier in longitudinal section
- FIG. 4 shows a section along the line IV-IV of FIG.
- FIG. 5 shows an end view of the roller carrier in the direction of arrow A from FIG. 3.
- a roller carrier in particular injection molded from plastic and usable as a winding core, has a central section, on the circumferential surface 1 of which a material strip 4 can be wound. At both ends there is a coupling element 2, 3, of which at least one, for example the coupling element 2, can be connected to a winding drive.
- 1 and 2 is a coupling element by a
- Pin 2 formed, which by an inner partition 5 of the sleeve-like roller carrier with a ring distance to the circumference protruding wall and has a small diameter.
- the pin 2 is, for example, non-circular or provided with a driver in the circumferential direction, so that a positive connection to the winding drive (not shown) can be achieved in the circumferential direction.
- Coupling element is formed by a hollow pin 3, the diameter and wall thickness of which correspond to the ring spacing of the first coupling element. 2 shows that, despite the protrusion on both sides, there is a spacing-free stringing together of the circumferential surfaces 1 of composite roller carriers, one pin 2 engaging in a hollow pin 3 in each case.
- Several material tapes 4 can be wound up simultaneously on the winding core formed in this way, which are produced, for example, by cutting a wide web. As soon as the rolls are wound, the winding core is removed from the winding drive and the individual rolls or roll carriers can be pulled apart. At least parts of the coupling elements 2, 3 protrude axially above the roller, which can serve as bearing pins of the roller in a dispenser.
- the coupling elements 2, 3 lock together.
- windows 6 are formed in the end region of the peripheral wall that carries the pin 2 and the hollow pin 3 has two resilient locking tongues 7 separated by slots 8, which snap into the windows 6 when the roller carriers are put together.
- the latching tongues 7 have an outer surface that rises to one side, so that there is a positive connection only in the direction of rotation during winding, but not in the opposite direction.
- the roller carriers can thus be easily detached from one another by twisting.
- the coupling elements 2, 3 can also be designed in the same way, so that they can be put together as desired. It is conceivable, for example, to provide the end faces with tines that engage axially.
Landscapes
- Winding Of Webs (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
Un mandrin (1) sur lequel une bande (4), notamment de papier, peut être enroulée, est conçu comme axe de bobinage. A ses extrémités, le mandrin comporte des éléments d'accouplement (2, 3) permettant de le rattacher à un entraînement d'enroulement ainsi qu'à un autre mandrin. Plusieurs mandrins sont réunis en un seul axe de bobinage, de sorte que plusieurs bandes (4) peuvent être enroulées simultanément. Après l'opération de bobinage, il est possible d'enlever et de séparer les bobines, les éléments d'accouplement (2, 3) formant des tourillons faisant axialement saillie.A mandrel (1) on which a strip (4), in particular of paper, can be wound, is designed as a winding spindle. At its ends, the mandrel has coupling elements (2, 3) allowing it to be attached to a winding drive as well as to another mandrel. Several mandrels are combined in a single winding axis, so that several strips (4) can be wound simultaneously. After the winding operation, it is possible to remove and separate the coils, the coupling elements (2, 3) forming axially projecting journals.
Description
Rollenträger Roller carrier
Die Erfindung betrifft einen Rollenträger, auf dessen Umfangsflache ein Materialband aufwickelbar ist, und der endseitige Kupplungselemente zur Verbindung mit einem Wickelantrieb aufweist.The invention relates to a roller carrier, on the circumferential surface of which a strip of material can be wound, and which has coupling elements at the end for connection to a winding drive.
Ein derartiger Rollenträger ist beispielsweise der US-A 4,754,537 zu entnehmen. In beiden Enden eines Rohres ist eine Endkappe eingesetzt, die zur Verbindung mit einer Antriebswelle eine quadratische Öffnung aufweist. Der Rollenträger ist insbesondere für Textilien gedacht und weist daher eine größere Länge, beispielsweise von zwei Metern auf.Such a roller carrier can be found, for example, in US Pat. No. 4,754,537. An end cap is inserted in both ends of a tube and has a square opening for connection to a drive shaft. The roller carrier is particularly intended for textiles and therefore has a greater length, for example of two meters.
Sollen Materialbänder gewickelt werden, die eine ge¬ ringe Breite aufweisen, beispielsweise Toilettenpapier oder dergleichen, so wird üblicherweise eine Karton¬ hülse in einem Vielfachen ihrer späteren Länge auf einen angetriebenen Wickelkern oder Dorn einer Wickel- maschine aufgeschoben und dort fixiert, insbesondere verspreizt. Hiezu sind relativ komplizierte Mechanismen bekannt. Der mit mehreren Materialbändern bewickelte Rollenträger wird dann vom Wickelkern gelöst, abgezogen und abgelängt. Sobald das aufgewickelte Materialband verbraucht ist, wird die leere Kartonhülse weggeworfen. Die Kartonhülsen werden selbst aus mehreren Lagen Pa¬ pier schraubenförmig gewickelt. Insgesamt ergibt sich somit eine relativ aufwendige, arbeits- und kosten- intensive Herstellung sowohl der Rollenträger als auch der gewickelten Rollen.If material tapes that have a small width, for example toilet paper or the like, are to be wound, a cardboard tube in multiples of its later length is usually pushed onto a driven winding core or mandrel of a winding machine and fixed there, in particular expanded. Relatively complicated mechanisms are known for this. The roll carrier wound with several material tapes is then detached from the winding core, pulled off and cut to length. As soon as the wound material tape is used up, the empty cardboard tube is thrown away. The cardboard tubes are wound helically from several layers of paper. Overall, this results in a relatively complex, labor-intensive and cost-intensive production of both the roller carriers and the wound rollers.
Die Erfindung hat es sich nun zur Aufgabe gestellt, diesen Nachteil zu beheben und schlägt für schmale Ma- terialbänder, wie Toilettenpapier od.dgl. einen Rollen-
träger vor, bei dem die endseitigen Kupplungselemente so ausgebildet sind, daß mehrere Rollenträger zu einem mehrere Materialbänder gleichzeitig wickelnden Wickel¬ kern zusammensetzbar sind. Auf diese Weise werden die bisherigen Kartonhülsen eingespart und Verbindungsein- richtungen zwischen den Wickelkernen und den Rollenträ¬ gern erübrigt. Die einzelnen Rollen können nach Ent¬ nahme des Wickelkernes aus der Wickelvorrichtung von¬ einander abgezogen werden. Die erfindungsgemäßen Rol¬ lenträger werden insbesondere aus Kunststoff gefertigt, beispielsweise spritzgegossen, sodaß die zur Verbindung miteinander und zur Verbindung mit dem Wickelantrieb erforderlichen Kupplungselemente mitformbar sind. Dies erlaubt es auch, einen geringeren Durchmesser des Rollenträgers zu erzielen, als dies bei gewickeltenThe invention has now set itself the task of eliminating this disadvantage and proposes for narrow strips of material such as toilet paper or the like. a role Carrier in which the end coupling elements are designed so that several roller carriers can be assembled to form a winding core that winds several material strips simultaneously. In this way, the previous cardboard tubes are saved and connecting devices between the winding cores and the roll carriers are dispensed with. After the winding core has been removed from the winding device, the individual rolls can be pulled off one another. The roll carriers according to the invention are in particular made of plastic, for example injection molded, so that the coupling elements required for connection to one another and for connection to the winding drive can be shaped. This also makes it possible to achieve a smaller diameter of the roller carrier than with wound ones
Kartonhülsen möglich ist, sodaß ein wesentlich längeres Materialband auf demselben Rollendurchmesser Platz fin¬ det. Je nach dem Materialwert des Rollenträgers können diese, wenn das Materialband aufgebraucht ist, gegebe- nenfalls auch weggeworfen werden, bevorzugt ist jedoch an eine Wiederverwendung der Rollenträger gedacht.Cardboard sleeves are possible, so that a much longer strip of material has space on the same roll diameter. Depending on the material value of the roll carrier, these can, if necessary, also be thrown away when the material band has been used up, but it is preferred to reuse the roll carrier.
Für Toilettenpapierrollen, Handtuchrollen, Haushalts¬ rollen, Kunststoff- oder Metallfolienrollen im Haus- haltsbereich, Säckchenrollen, usw. werden häufig Spen¬ der eingesetzt, in denen zumindest zwei derartige Rol¬ len Platz finden. Nach dem Aufbrauch der ersten Rolle steht somit eine zweite zur Verfügung, die in Führungen in die Verwendungsposition nachrutscht. Eine hiezu ge- eignete bevorzugte Ausführung sieht vor, daß beideFor toilet paper rolls, towel rolls, household rolls, plastic or metal foil rolls in the household area, sachet rolls, etc., dispensers are often used, in which at least two such rolls can be accommodated. After the first role has been used up, a second one is available which slides into the use position in guides. A preferred embodiment suitable for this provides that both
Kupplungselemente über den Umfang axial vorstehen und Führungs- bzw. Lagerzapfen bilden. Die Verwendung der Rollen in den erwähnten Spendern erleichtert auch das Einsammeln der leeren Rollenträger für die Wieder- Verwendung, da sie sich in einem Auffangraum des Spen-
ders sammeln lassen. Sie werden zusammengesteckt und als Wickelkern wieder an den Antrieb der Wickelvorrich¬ tung angesetzt.Coupling elements protrude axially over the circumference and form guide or bearing journals. The use of the rolls in the dispensers mentioned also makes it easier to collect the empty roll carriers for reuse, since they are located in a collecting area of the dispenser. let it collect. They are plugged together and attached to the drive of the winding device as the winding core.
Eine weitere Ausführung sieht vor, daß zumindest ein Kupplungselement federnde Restelemente aufweist.Another embodiment provides that at least one coupling element has resilient residual elements.
Nachstehend wird nun die Erfindung an Hand der Figuren der beiliegenden Zeichnungen näher beschrieben, ohne darauf beschränkt zu sein.The invention will now be described in more detail below with reference to the figures of the accompanying drawings, without being limited thereto.
Es zeigen:Show it:
Fig.l eine erste Ausführung eines Rollenträger im Längsschnitt Fig.2 einen aus mehreren Rollenträgern nach Fig. 1 zusammengesetzten Wickelkern, ebenfalls im Längsschnitt,1 shows a first embodiment of a roll carrier in longitudinal section, FIG. 2 shows a winding core composed of several roll carriers according to FIG. 1, also in longitudinal section,
Fig.3 eine zweite Ausführung eines Rollenträgerε im Längsschnitt, Fig.4 einen Schnitt nach der Linie IV-IV der Fig.3 shows a second embodiment of a roller carrier in longitudinal section, FIG. 4 shows a section along the line IV-IV of FIG.
3, und3, and
Fig.5 eine Stirnansicht des Rollenträgers in Rich¬ tung des Pfeiles A von Fig. 3.5 shows an end view of the roller carrier in the direction of arrow A from FIG. 3.
Ein insbesondere aus Kunststoff spritzgegossener, als Wickelkern verwendbarer Rollenträger weist einen mitt¬ leren Abschnitt auf, auf dessen Umfangsflache 1 ein Ma¬ terialband 4 aufwickelbar ist. An beiden Enden steht ein Kupplungselement 2,3 vor, von denen zumindest eines, beispielsweise das Kupplungselement 2 mit einem Wickelantrieb verbindbar ist.A roller carrier, in particular injection molded from plastic and usable as a winding core, has a central section, on the circumferential surface 1 of which a material strip 4 can be wound. At both ends there is a coupling element 2, 3, of which at least one, for example the coupling element 2, can be connected to a winding drive.
Gemäß Fig. 1 und 2 ist ein Kupplungselement durch einen1 and 2 is a coupling element by a
Zapfen 2 gebildet, der von einer inneren Zwischenwand 5 des hülsenartigen Rollenträgers mit Ringabstand zur Um-
fangswand vorsteht und einen kleinen Durchmesser auf¬ weist. Der Zapfen 2 ist beispielsweise unrund ausgebil¬ det oder mit einem Mitnehmer in Umfangsrichtung verse¬ hen, sodaß ein Formschluß zum nicht gezeigten Wickelan- trieb in Umfangsrichtung erzielbar ist. Das zweitePin 2 formed, which by an inner partition 5 of the sleeve-like roller carrier with a ring distance to the circumference protruding wall and has a small diameter. The pin 2 is, for example, non-circular or provided with a driver in the circumferential direction, so that a positive connection to the winding drive (not shown) can be achieved in the circumferential direction. The second
Kupplungselement ist durch einen Hohlzapfen 3 gebildet, dessen Durchmesser und Wandstärke dem Ringabstand des ersten Kupplungselementes entsprechen. Daraus ergibt sich wie Fig. 2 zeigt, trotz des beidseitigen überstan- des eine abstandsfreie Aneinanderreihung der Umfangs- flachen 1 zusammengesetzter Rollenträger, wobei jeweils ein Zapfen 2 in einen Hohlzapfen 3 eingreift. Auf den so gebildeten Wickelkern lassen sich mehrere Materi¬ albänder 4 gleichzeitig aufwickeln, die beispielsweise durch Zerschneiden einer breiten Bahn entstehen. Sobald die Rollen gewickelt sind, wird der Wickelkern vom Wickelantrieb abgenommen und die einzelnen Rollen bzw. Rollenträger lassen sich voneinander abziehen. Dabei stehen zumindest Teile der Kupplungselemente 2,3 je- weils axial über die Rolle vor, die als Lagerzapfen der Rolle in einem Spender dienen können.Coupling element is formed by a hollow pin 3, the diameter and wall thickness of which correspond to the ring spacing of the first coupling element. 2 shows that, despite the protrusion on both sides, there is a spacing-free stringing together of the circumferential surfaces 1 of composite roller carriers, one pin 2 engaging in a hollow pin 3 in each case. Several material tapes 4 can be wound up simultaneously on the winding core formed in this way, which are produced, for example, by cutting a wide web. As soon as the rolls are wound, the winding core is removed from the winding drive and the individual rolls or roll carriers can be pulled apart. At least parts of the coupling elements 2, 3 protrude axially above the roller, which can serve as bearing pins of the roller in a dispenser.
In der Ausführung nach Fig. 3 bis 5 verrasten die Kupp¬ lungselemente 2,3 miteinander. Hiezu sind in dem den Zapfen 2 tragenden Endbereich der Umfangswand Fenster 6 ausgebildet und der Hohlzapfen 3 weist zwei durch Schlitze 8 getrennte federnde Rastzungen 7 auf, die beim Aneinandersetzen der Rollenträger in die Fenster 6 einschnappen. Die Rastzungen 7 weisen eine nach einer Seite ansteigende Außenfläche auf, sodaß nur in der Drehrichtung beim Wickeln ein Formschluß gegeben ist, nicht jedoch in der Gegenrichtung. Die Rollenträger lassen sich somit durch Verdrehen leicht voneinander lösen.
Die Kupplungselemente 2,3 können auch gleichartig aus¬ gebildet sein, sodaß sie beliebig aneinandersetzbar sind. So ist es etwa denkbar, die Stirnseiten mit Zin¬ ken zu versehen, die axial ineinandergreifen.
In the embodiment according to FIGS. 3 to 5, the coupling elements 2, 3 lock together. For this purpose, windows 6 are formed in the end region of the peripheral wall that carries the pin 2 and the hollow pin 3 has two resilient locking tongues 7 separated by slots 8, which snap into the windows 6 when the roller carriers are put together. The latching tongues 7 have an outer surface that rises to one side, so that there is a positive connection only in the direction of rotation during winding, but not in the opposite direction. The roller carriers can thus be easily detached from one another by twisting. The coupling elements 2, 3 can also be designed in the same way, so that they can be put together as desired. It is conceivable, for example, to provide the end faces with tines that engage axially.
Claims
1. Rollenträger, auf dessen Umfangsflache ein Materi¬ alband (4) aufwickelbar ist, und der endseitige Kupplungselemente (2,3) zur Verbindung mit einem Wickelantrieb aufweist, dadurch gekennzeichnet, daß die endseitigen Kupplungselemente (2,3) so ausgebildet sind, daß mehrere Rollenträger zu einem mehrere Materialbänder (4) gleichzeitig wickelnden Wickelkern zusammensetzbar sind.1. roller carrier, on the circumferential surface of a material tape (4) can be wound up, and the end coupling elements (2,3) for connection to a winding drive, characterized in that the end coupling elements (2,3) are designed so that several roll carriers can be assembled to form a winding core winding several material strips (4) at the same time.
2. Rollenträger nach Anspruch 1, dadurch gekennzeich¬ net, daß beide Kupplungselemente (2,3) über den Umfang (1) axial vorstehen und Lagerzapfen bilden.2. Roller carrier according to claim 1, characterized gekennzeich¬ net that both coupling elements (2,3) project axially over the circumference (1) and form bearing journals.
3. Rollenträger nach Anspruch 1 oder 2, dadurch ge¬ kennzeichnet, daß die Kupplungselemente (2,3) verschiedenartig ausgebildet sind.3. Roller carrier according to claim 1 or 2, characterized ge indicates that the coupling elements (2,3) are designed differently.
4. Rollenträger nach einem der Ansprüche 1 bis 3, da¬ durch gekennzeichnet, daß zumindest ein Kupplungselement (2,3) federnde Restelemente aufweist. 4. Roller carrier according to one of claims 1 to 3, da¬ characterized in that at least one coupling element (2,3) has resilient residual elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92922018A EP0608337A1 (en) | 1991-11-14 | 1992-10-23 | Reel for roll material |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91119401 | 1991-11-14 | ||
| EP91119401 | 1991-11-14 | ||
| EP92922018A EP0608337A1 (en) | 1991-11-14 | 1992-10-23 | Reel for roll material |
| PCT/AT1992/000131 WO1993010033A1 (en) | 1991-11-14 | 1992-10-23 | Reel for roll material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0608337A1 true EP0608337A1 (en) | 1994-08-03 |
Family
ID=8207332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92922018A Withdrawn EP0608337A1 (en) | 1991-11-14 | 1992-10-23 | Reel for roll material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0608337A1 (en) |
| AU (1) | AU2867792A (en) |
| CA (1) | CA2123412A1 (en) |
| WO (1) | WO1993010033A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810281A (en) * | 1995-11-20 | 1998-09-22 | Kole; John W. | Spool assembly with slotted tubes |
| US6110502A (en) * | 1998-02-19 | 2000-08-29 | Mcneil-Ppc, Inc. | Method for producing water dispersible sterol formulations |
| FI116936B (en) | 2003-08-29 | 2006-04-13 | Metso Paper Inc | A method for winding a paper, board or material web and a reel of paper, board or material |
| DE102007000630A1 (en) * | 2007-11-06 | 2009-05-07 | Voith Patent Gmbh | Winding sleeve arrangement for a roll winding device, winding tube and roll winding device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1897227A (en) * | 1930-02-14 | 1933-02-14 | George D Atwood | Spool |
| IT7960370V0 (en) * | 1979-05-08 | 1979-05-08 | Savio Spa | STACKABLE TUBE. |
| US4754537A (en) * | 1984-04-23 | 1988-07-05 | Burlington Industries, Inc. | Process of making a cloth takeup mandrel |
-
1992
- 1992-10-23 EP EP92922018A patent/EP0608337A1/en not_active Withdrawn
- 1992-10-23 WO PCT/AT1992/000131 patent/WO1993010033A1/en not_active Application Discontinuation
- 1992-10-23 CA CA 2123412 patent/CA2123412A1/en not_active Abandoned
- 1992-10-23 AU AU28677/92A patent/AU2867792A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9310033A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2123412A1 (en) | 1993-05-27 |
| WO1993010033A1 (en) | 1993-05-27 |
| AU2867792A (en) | 1993-06-15 |
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