WO2001042582A1 - Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method - Google Patents
Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method Download PDFInfo
- Publication number
- WO2001042582A1 WO2001042582A1 PCT/EP2000/010407 EP0010407W WO0142582A1 WO 2001042582 A1 WO2001042582 A1 WO 2001042582A1 EP 0010407 W EP0010407 W EP 0010407W WO 0142582 A1 WO0142582 A1 WO 0142582A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- profile bar
- profile
- band
- incising
- incised
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
- B21D47/02—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars by expanding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
- E04C3/083—Honeycomb girders; Girders with apertured solid web
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
- E04C3/09—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders at least partly of bent or otherwise deformed strip- or sheet-like material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
- E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0473—U- or C-shaped
Definitions
- This invention relates to a method for producing metal profile bars for support structures for panels, particularly of plaster-board, and a profile bar produced by the method.
- They generally comprise vertical C-shaped profile bars secured at both their end within the longitudinal cavity of horizontal profile bars fixed to the floor and ceiling.
- the plaster-board panels are fixed to one or both of the lateral flanges of these vertical C-shaped profile bars, preferably by self-tapping screws.
- a drawback of these known profile bars is that during the fixing of the panels to the vertical C-shaped profile bars, the self-tapping screws tend to bend that flange of the profile bar into which they are being screwed, so making fixing difficult.
- these profile bars are provided with apertures, preferably with a dished edge, and/or with raised stiffening portions. This not only does not reduce material consumption, but requires additional work on the profile bar during or after its manufacture.
- Another known profile bar for applying plaster-board panels has a substantially ⁇ -shaped cross-section, with the two inclined flanges comprising a series of cuts for reducing the thermal conductivity of the profile bar and hence increasing its fire resistance.
- a certain facility for deforming the profile bar at the inclined flanges enables the distance between the wo parallel flanges to be adjusted, hence enabling the same profile bars to be used for forming plaster-board walls of different thicknesses.
- An object of the invention is to produce profile bars, for forming plaster-board panel support structures which provide all the facilities offered individually by the different types of known profile bars, while at the same time eliminating all the drawbacks individually presented by said known profile bars.
- a C-shaped profile bar as claimed in claim 10 is obtained through this method.
- Figure 1 is a plan view of a piece of the profile bar of the invention
- Figure 2 is a plan view of a second form of profile bar of the invention
- Figure 3 is a plan view of a third form of profile bar of the invention
- Figure 4 is a cross-section through a profile bar of the invention also comprising stretched bands along its lateral flanges.
- the profile bar of the invention is of
- the starting metal strip of width less than the development of the profile bar to be obtained, has been unwound from a reel and if necessary subjected to straightening operations, it passes through pairs of incising and stretching rollers, which subject the middle longitudinal band 6 of the central web 4 to incising and to stretching until the strip has reached an overall width equal to the development of the final C-shaped profile bar to be obtained.
- the incising and stretching rollers preferably have a configuration such that the incisions produced in the metal strip have their burrs, which inevitably form during incising, projecting only from that side of the strip which after profile-forming will represent the inner side, in order to eliminate any risk to those operators who have to handle the profile bar.
- the burrs deriving from incising could instead project outwards from the profile bar, provided those parts comprising these burrs are slightly set back from the adjacent unburred parts, to in this manner provide protection for the operator.
- the strip is passed through pairs of profile-forming rollers to transform the incised and stretched strip into a C-shaped profile bar.
- the starting strip can be firstly subjected to an incising stage with simultaneous stretching, followed by a profile-forming stage, or it can be subjected firstly to an incising stage, teen 4o forming, and finally to stretching, or to a single stage comprising incising, stretching and profile-forming.
- the C-shaped profile bar with its central web stretched is then subjected to a pressing stage, to produce at regular intervals along the stretched central web a series of transverse (Figure 2) or inclined ( Figure 3) raised portions or reliefs or undulations which bring the corresponding portion of stretched band 6 and a part of the adjacent portions of unstretched web into a plane slightly spaced from the plane of the web.
- the endless profile bar obtained in this manner is then cut transversely to size.
- the increase in transverse flexure yieldability of the central web 4 due to the stretching is compensated by an increase in the moment of inertia, and hence by an increase in the transverse bending resistance, obtained by pressing.
- the mechanical characteristics of the profile bar obtained are totally comparable with those of a profile bar of identical dimensions but without the stretched web.
- the profile bar of the invention also has considerable further advantage, such as:
- the illustrated example relates to a C-shaped profile bar with a single central web stretched ant then pressed into spaced-apart rectangual areas or into various undulated patterns.
- stretching and pressing could also be applied to the lateral flanges 2 (see Figure 4), which in this manner can be lightened and stiffened against transverse flexure, so being suitable for ceiling application of plaster-board panels without suffering deformation of the lateral flanges, which could be a possible cause of uncoupling of the profile bar from the suspension members.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Building Environments (AREA)
- Laminated Bodies (AREA)
Abstract
A method for producing C-shaped metal profile bars for support structures for panels, particularly of plaster-board, characterised by subjecting a metal strip of width less than the development of the profile bar to be obtained, to the following operations: incising at least that band of the strip which in the C-shaped profile bar is to form the central web, profile-forming said strip, transversely stretching the band subjected to incising, pressing areas of said central web along said stretched band to bring them outside of the plane of the web.
Description
METHOD FOR PRODUCING METAL PROFILE BARS FOR SUPPORT STRUCTURES FOR PANELS, PARTICULARLY OF PLASTER-BOARD, AND PROFILE BAR PRODUCED BY THE METHOD.
This invention relates to a method for producing metal profile bars for support structures for panels, particularly of plaster-board, and a profile bar produced by the method.
Metal structures to which plaster-board panels are applied are known.
They generally comprise vertical C-shaped profile bars secured at both their end within the longitudinal cavity of horizontal profile bars fixed to the floor and ceiling. The plaster-board panels are fixed to one or both of the lateral flanges of these vertical C-shaped profile bars, preferably by self-tapping screws.
A drawback of these known profile bars is that during the fixing of the panels to the vertical C-shaped profile bars, the self-tapping screws tend to bend that flange of the profile bar into which they are being screwed, so making fixing difficult.
To enable cables to pass behind the plaster-board panels and through the vertical profile bars of the support structure, these profile bars, and in particular their central web, are provided with apertures, preferably with a dished edge, and/or with raised stiffening portions. This not only does not reduce material consumption, but requires additional work on the profile bar during or after its manufacture.
Another known profile bar for applying plaster-board panels has a substantially Σ-shaped cross-section, with the two inclined flanges comprising a series of cuts for reducing the thermal conductivity of the profile bar and hence increasing its fire resistance. Moreover, a certain facility for deforming the profile bar at the inclined flanges enables the distance between the wo
parallel flanges to be adjusted, hence enabling the same profile bars to be used for forming plaster-board walls of different thicknesses.
Drawbacks of this profile bar are the considerable use of material for its construction ad the large number of operation required for its production. An object of the invention is to produce profile bars, for forming plaster-board panel support structures which provide all the facilities offered individually by the different types of known profile bars, while at the same time eliminating all the drawbacks individually presented by said known profile bars. This and further objects which will be apparent from the ensuing description are attained, according to the invention, by a method for producing C-shaped metal profile bars for support structure for panels, particularly of plaster-board, as described in claim 1.
A C-shaped profile bar as claimed in claim 10 is obtained through this method.
A preferred embodiment of the invention is described in detail hereinafter with reference to the accompanying drawings, on which: Figure 1 is a plan view of a piece of the profile bar of the invention, Figure 2 is a plan view of a second form of profile bar of the invention, Figure 3 is a plan view of a third form of profile bar of the invention, and
Figure 4 is a cross-section through a profile bar of the invention also comprising stretched bands along its lateral flanges.
As can be seen from the figures, the profile bar of the invention is of
C-shape, with its lateral flanges 2 flat and its central web 4 having a stretched central longitudinal band 6 comprising a sequence of substantially rectangular areas 8 obtained by a pressing operation which has invoiced .both 4he
corresponding portion of central band 6 and the adjacent portions of unstretched web 4 and has brought said areas 8 into a plane different from the plane of the web.
More specifically, after the starting metal strip, of width less than the development of the profile bar to be obtained, has been unwound from a reel and if necessary subjected to straightening operations, it passes through pairs of incising and stretching rollers, which subject the middle longitudinal band 6 of the central web 4 to incising and to stretching until the strip has reached an overall width equal to the development of the final C-shaped profile bar to be obtained.
The incising and stretching rollers preferably have a configuration such that the incisions produced in the metal strip have their burrs, which inevitably form during incising, projecting only from that side of the strip which after profile-forming will represent the inner side, in order to eliminate any risk to those operators who have to handle the profile bar.
However, the burrs deriving from incising could instead project outwards from the profile bar, provided those parts comprising these burrs are slightly set back from the adjacent unburred parts, to in this manner provide protection for the operator. Following the incising and stretching stage, the strip is passed through pairs of profile-forming rollers to transform the incised and stretched strip into a C-shaped profile bar.
To achieve the required final result, different methods can be used. For example, as already stated, the starting strip can be firstly subjected to an incising stage with simultaneous stretching, followed by a profile-forming stage, or it can be subjected firstly to an incising stage, teen 4o
forming, and finally to stretching, or to a single stage comprising incising, stretching and profile-forming.
The C-shaped profile bar with its central web stretched is then subjected to a pressing stage, to produce at regular intervals along the stretched central web a series of transverse (Figure 2) or inclined (Figure 3) raised portions or reliefs or undulations which bring the corresponding portion of stretched band 6 and a part of the adjacent portions of unstretched web into a plane slightly spaced from the plane of the web.
It is intended that pressing takes place on termination of the profile- forming stage, although it is possible to effect it during passage through the forming machine or after stretching but prior to profile-forming.
The endless profile bar obtained in this manner is then cut transversely to size.
Independently of the method followed, the increase in transverse flexure yieldability of the central web 4 due to the stretching is compensated by an increase in the moment of inertia, and hence by an increase in the transverse bending resistance, obtained by pressing.
Because of this, the mechanical characteristics of the profile bar obtained are totally comparable with those of a profile bar of identical dimensions but without the stretched web. At the same time the profile bar of the invention also has considerable further advantage, such as:
- a low heat transfer coefficient from one lateral flange to the other,
- a low sound transfer coefficient from one lateral flange to the other,
- the ability to ventilate the interspace of the wall bounded by the facing plaster-board panels, by way of the panel support structure,
- use of a smaller quantity of material than that required for a traditional C- shaped profile bar of equal outer dimensions,
- the ability to vary the width of the central web of the profile bar within certain limits while starting from the same metal strip, by varying the extent of stretching,
- the ability to obtain cable passage apertures in the profile bar without special machining, these apertures being able to be enlarged if necessary by simply operating with a cutter in the regions concerned,
- the ability to obtain these facilities on the profile-forming line itself, and hence without substantial increase in machining times and costs.
The illustrated example relates to a C-shaped profile bar with a single central web stretched ant then pressed into spaced-apart rectangual areas or into various undulated patterns. However, stretching and pressing could also be applied to the lateral flanges 2 (see Figure 4), which in this manner can be lightened and stiffened against transverse flexure, so being suitable for ceiling application of plaster-board panels without suffering deformation of the lateral flanges, which could be a possible cause of uncoupling of the profile bar from the suspension members.
Claims
1. A method for producing C-shaped metal profile bars for support structures for panels, particularly of plaster-board, characterised by subjecting a metal strip of width less than the development of the profile bar to be obtained, to the following operations
- incising at least that band of the strip which in the C-shaped profile bar is to form the central web,
- profile-forming said strip,
- transversely stretching the band subjected to incising, - pressing areas of said central web along said stretched band to bring then outside of the plane of the web.
2. A method as claimed in claim 1 , characterised by effecting the incising such as to bring the burrs, which form during this stage, onto that side of the strip corresponding to the inner side of the profile bar to be obtained.
3. A method as claimed in claim 1, characterised by effecting the incising in such a manner as to create, on the outer side of the obtained profile bar, non-burred, areas which project more than burred areas.
4. A method as claimed in claim 1 , characterised in that the incising stage precedes the stretching stage.
5. A method as claimed in claim 1 , characterised in that the incising and burring stages take place in progressive steps, within each step stretching being simultaneous with the incising.
6. A method as claimed in claim 1 , characterised by comprising a first profile-forming stage preceding the stretching stage and a second profile- forming stage following the stretching stage.
7. A method as claimed in claim 1, characterised in that the profile-forming stage follows the stretching stage.
8. A method as claimed in claim 1, characterised in that the incising, stretching, profile-forming and pressing stages take place during the same passage of the metal strip through different stations on the same machining line.
9. A method as claimed in one or more of claims 1 a 8, characterised by processing those longitudinal bands of the metal strip which are to form the central web and the two lateral flanges in the C-shaped profile bar.
10. A C-shaped metal profile bar obtainable by the method claimed in one or more of claims 1 to 9, characterised in that at least its central web (4) comprises at least one incised longitudinal band stretched transversely and comprising pressed areas (8) which are positioned outside the plane of the web and have a width greater than the width of said incised band.
11. A profile bar as claimed in claim 10, characterised in that only its central web (4) comprised the incised, stretched and pressed longitudinal band.
12. A profile bar as claimed in claim 10, characterised in that its central web (4) and both its lateral flanges comprise the incised, stretched and pressed longitudinal band.
13. A profile bar as claimed in claim 10, characterised in that its incised band has its burrs on the inner side of the profile bar.
14. A profile bar as claimed in claim 10, characterised in that its incised band has its burrs on the outer side of the profile bar, in areas less projecting than non-burred areas.
15. A profile bar as claimed in claim 10, characterised in that its incised and stretched band comprises a plurality of raised portions equidistant in the longitudinal direction.
16. A profile bar as claimed in claim 15, characterised in that the raised 5 portions are of substantially rectangular shape.
17. A profile bar as claimed in claim 15, characterised in that the incised and stretched band comprises a transverse continuous undulation.
18. A profile bar as claimed in claim 15, characterised in that the incised and stretched band comprises a continuous undulation inclined to the fJ longitudinal axis of the profile bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU77900/00A AU7790000A (en) | 1999-12-07 | 2000-10-23 | Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITVE99A000048 | 1999-12-07 | ||
| ITVE990048 IT1311808B1 (en) | 1999-12-07 | 1999-12-07 | METHOD FOR OBTAINING METALLIC PROFILES FOR PANEL SUPPORT STRUCTURES, PARTICULARLY PLASTERBOARD, AND PROFILE OBTAINABLE WITH THE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001042582A1 true WO2001042582A1 (en) | 2001-06-14 |
Family
ID=11424482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/010407 Ceased WO2001042582A1 (en) | 1999-12-07 | 2000-10-23 | Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU7790000A (en) |
| IT (1) | IT1311808B1 (en) |
| WO (1) | WO2001042582A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086818A1 (en) * | 2007-01-15 | 2008-07-24 | Knauf Insaat Ve Yapi Elemaniari Ve Ticaret A.S. | Profile element as carrier structure for the construction of walls |
| WO2009059731A1 (en) * | 2007-11-09 | 2009-05-14 | Protektorwerk | Metal profile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3747184A (en) * | 1971-04-07 | 1973-07-24 | H Zaiss | System for forming building frame structures |
| EP0136618A2 (en) * | 1983-10-06 | 1985-04-10 | Richter-System GmbH & Co. KG | Sheet metal profile for the supporting shell of double-walled partitions |
| US4513551A (en) * | 1982-05-12 | 1985-04-30 | Ulf Gauffin | Structural support |
| US5657596A (en) * | 1994-05-25 | 1997-08-19 | Powers, Iii; John | Fabricated building with metal purlins |
| WO1998022674A1 (en) * | 1996-11-20 | 1998-05-28 | Laserplus Oy | Method for manufacturing a lattice structure |
-
1999
- 1999-12-07 IT ITVE990048 patent/IT1311808B1/en active
-
2000
- 2000-10-23 AU AU77900/00A patent/AU7790000A/en not_active Abandoned
- 2000-10-23 WO PCT/EP2000/010407 patent/WO2001042582A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3747184A (en) * | 1971-04-07 | 1973-07-24 | H Zaiss | System for forming building frame structures |
| US4513551A (en) * | 1982-05-12 | 1985-04-30 | Ulf Gauffin | Structural support |
| EP0136618A2 (en) * | 1983-10-06 | 1985-04-10 | Richter-System GmbH & Co. KG | Sheet metal profile for the supporting shell of double-walled partitions |
| US5657596A (en) * | 1994-05-25 | 1997-08-19 | Powers, Iii; John | Fabricated building with metal purlins |
| WO1998022674A1 (en) * | 1996-11-20 | 1998-05-28 | Laserplus Oy | Method for manufacturing a lattice structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008086818A1 (en) * | 2007-01-15 | 2008-07-24 | Knauf Insaat Ve Yapi Elemaniari Ve Ticaret A.S. | Profile element as carrier structure for the construction of walls |
| WO2008087009A1 (en) * | 2007-01-15 | 2008-07-24 | Knauf Insaat Ve Yapi Elemanlari Sanayi Ve Ticaret A.S. | Profile element as carrier structure for the construction of walls |
| EA014816B1 (en) * | 2007-01-15 | 2011-02-28 | Кнауф Иншаат Ве Япы Элеманлари Санаи Ве Тиджарет А.С. | A profile to serve as an element of a structure for the construction of walls |
| WO2009059731A1 (en) * | 2007-11-09 | 2009-05-14 | Protektorwerk | Metal profile |
| DE102007053471A1 (en) * | 2007-11-09 | 2009-05-14 | Protektorwerk Florenz Maisch Gmbh & Co. Kg | metal profile |
Also Published As
| Publication number | Publication date |
|---|---|
| ITVE990048A1 (en) | 2001-06-07 |
| AU7790000A (en) | 2001-06-18 |
| IT1311808B1 (en) | 2002-03-19 |
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