EP1553245A1 - Disposable formwork for columns having a circular section - Google Patents
Disposable formwork for columns having a circular section Download PDFInfo
- Publication number
- EP1553245A1 EP1553245A1 EP03757079A EP03757079A EP1553245A1 EP 1553245 A1 EP1553245 A1 EP 1553245A1 EP 03757079 A EP03757079 A EP 03757079A EP 03757079 A EP03757079 A EP 03757079A EP 1553245 A1 EP1553245 A1 EP 1553245A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formwork
- column
- circular section
- tubular body
- fibreglass
- 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- Withdrawn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
- 238000009415 formwork Methods 0.000 title claims description 32
- 239000011152 fibreglass Substances 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 239000002390 adhesive tape Substances 0.000 claims abstract description 9
- 239000004698 Polyethylene Substances 0.000 claims abstract description 3
- -1 polyethylene Polymers 0.000 claims abstract description 3
- 229920000573 polyethylene Polymers 0.000 claims abstract description 3
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000004567 concrete Substances 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
- E04G13/021—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor for circular columns
Definitions
- the present invention refers to a disposable formwork, especially conceived to produce cylindrical columns, for example using reinforced concrete.
- the object of the invention is to achieve a formwork that allows perfectly cylindrical columns to be achieved.
- invention patent 200001776 envisages that the rigid bands fixed using adhesive strips of the above patent are replaced by a single board, also with a plastic-coated internal surface, which is subjected to a number of longitudinal cuts on its external surface to permit the required deformation thereof, so that, in turn, it may be transformed from its original, flat configuration into a cylindrical configuration.
- these cuts or slots in its external surface make the board deform in an irregular manner, obviously most accentuated on the lines corresponding to said cuts which, in practice , entails that the final result is not a perfect cylinder either, but rather that its section is also polygonal.
- invention patent No. 9902893 Machine for applying fibreglass reinforcement to disposable formwork for columns
- Invention Patent application "Formwork for prismatic or cylindrical columns” with application number 200002631 also of the applicant, which envisages that the surrounding fibreglass mesh that gives the formwork the necessary mechanical resistance be replaced by a strip of a self-adhesive nature, consisting of paper or similar, wherein the fibreglass threads would be embedded and which exclusively adopt a longitudinal arrangement (instead of forming a mesh) which, after wrapping said strip on the formwork, makes the fibreglass threads adopt an appreciably transversal arrangement with respect to the formwork's axis, thus eliminating longitudinal threads that, due to their own situation, are inoperative according to the pursued object.
- the disposable formwork proposed by the invention starting from the basic premise of the abovementioned patents, i.e. establishing a tubular body reinforced externally through fibreglass threads, either in the shape of a mesh or embedded in a paper or similar support allowing the production of a perfectly cylindrical column, meaning a perfectly circular section, with an absence of any type of edge or roughness in its surface.
- the formwork is structured using a smooth rigid plastic plate, such as, for example, made of high impact polystyrene (HDPE) or other similar material, a plate that adopts a perfectly cylindrical configuration when wrapped around an inflatable assembly core, obviously of a cylindrical configuration and with an external diameter equal to the diameter of the concrete column to be produced, joining the two complementary edges of said smooth plastic plate using self-adhesive tape.
- a smooth rigid plastic plate such as, for example, made of high impact polystyrene (HDPE) or other similar material, a plate that adopts a perfectly cylindrical configuration when wrapped around an inflatable assembly core, obviously of a cylindrical configuration and with an external diameter equal to the diameter of the concrete column to be produced, joining the two complementary edges of said smooth plastic plate using self-adhesive tape.
- HDPE high impact polystyrene
- the thus produced tubular body is complemented with the external surround structure based on fibreglass threads, whether in the shape of a mesh or independent threads embedded in a paper support or similar.
- the elasticity of the rigid plastic used allows its transformation into a cylinder without the need for making cuts in its external surface or any other type of manipulations and said smooth plate, precisely because of its continuous thickness, ensures a perfectly cylindrical internal surface for the formwork which, in turn, determines a perfectly cylindrical section, i.e. not polygonal, for the column to be produced.
- the inflatable nature of the assembly core that has been referred to above has the purpose of facilitating the latter's disassembly once the formwork has been produced by deflating said core.
- a smooth plate (1) of rigid plastic is used, such as, for example, rectangular, high impact polyethylene, , with a length equal to the envisaged height of the column to be produced, with a width in turn coinciding with the evolution of the section of said column, in other words with said section's circumference.
- This plastic plate (1) is arched or wrapped around an assembly core (2), cylindrical, formally and dimensionally coinciding with the column to be produced, in such a way that the plate (1) comes back into contact with itself along its longitudinal or vertical edges (3-3') adopting a tubular and perfectly cylindrical shape, which is stabilised , in principle , with the help of adhesive tape (4) as shown in the enlarged detail of figure 3.
- a reinforcing strip (5) may be applied externally, of the same rigid plastic as the plate (1) and length coinciding with length thereof, that is fixed to it with the help of a pair of adhesive tapes (4-4') or a much wider single adhesive tape, as shown in the detail of figure 4, a strip (5) that may have a varying width but , for the pursued object, can have a size between 4 and 5 cm.
- the tubular body thus produced is externally reinforced with the classic helicoidal casing on the basis of a fibreglass mesh or a series of fibreglass threads embedded longitudinally and equidistantly on a paper support or similar, to provide the tubular body, and especially the joint (3-3') thereof, with the appropriate stability and mechanical resistance against radial pressure exerted by the concrete when poured inside the formwork, obviously after first removing the core (2) used during its assembly, and whose inflatable nature allows for an incredibly fast and simple disassembly.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a perfectly cylindrical column that is structured by means of a
rigid plastic flat sheet, e.g. high impact polyethylene or the like, the length of which
coincides with the envisaged height of the column and the width of which coincides
with the size of the section of said column. Said flat sheet is wound on a mounting core
with the purpose of adopting a tubular and cylindrical configuration by connecting its
longitudinal edges, said connection being temporarily stabilized with the aid of an
adhesive tape extending throughout the entire connecting line. Said assembly is then
provided with an outer rigidizing envelope in the form of a strip that is helicoidally
wound on the tubular body, said strip consisting of a fiberglass mesh or mesh of
fiberglass fibers longitudinally embedded in a paper support or the like. Said envelope
will bear the radial strains generated by the casting of the concrete into the tubular body.
Description
- The present invention refers to a disposable formwork, especially conceived to produce cylindrical columns, for example using reinforced concrete.
- The object of the invention is to achieve a formwork that allows perfectly cylindrical columns to be achieved.
- To build a column on the basis of, for example, reinforced concrete, it is necessary to have a mould or formwork that gives the final configuration and size thereto, and said formwork must integrate two different but complementary characteristics: on the one hand to ensure the column's perfect surface finish and, on the other hand, to do so at a sufficiently low cost so as to make it viable for the builder, especially when comprising disposable formwork.
- Formwork offering the characteristics described above is disclosed in the Spanish invention patent with application number 9800419, of which the applicant is titleholder, which discloses disposable formwork for columns structured as a tubular body or core made on the basis of four pieces of expanded polystyrene, fitted together by means of adhesive strip throughout their connecting edges, a tubular core that is internally covered with a plastic sheet constituting an impermeable barrier, which is attached to said core by means of a layer of adhesive, whereas externally said tubular core is reinforced with a grid-like support structure, consisting of fibreglass mesh helicoidally wrapped around the tubular core and also attached thereto by means of adhesive, in such a way that said mesh confers the appropriate mechanical stability to the ensemble against the radial pressure generated by the mass of concrete to be poured inside the formwork.
- An improvement of this formwork is contained in the certificate of addition to the abovementioned patent, with application number 9802487, which contemplates replacing the plastic sheet that forms the impermeable barrier attached to the core, by a series of wooden panels that are plastic-coated on their internal surface, or of rigid plastic plates, that join together with the help of adhesive strips conveniently mounted on their internal surface corresponding to the adjacent edges between plates, thus producing an internal tubular body with a perfectly smooth , waterproof surface, whereon, subsequently and externally , the polystyrene pieces constituting the central rigid tubular body are arranged and whereon, in turn and finally, the external support layer is established on the basis of the abovementioned helicoidally wound fibreglass mesh, providing the formwork with the appropriate mechanical resistance.
- These two types of formwork are designed to produce square or rectangular section columns, but obviously on many occasions cylindrical columns must be produced, in other words, columns with a circular section. To this effect, patent invention with application number 200000010, of the same applicant, envisages increasing considerably the number of rigid plates that conform the formwork, specifically by turning them into very narrow strips, which given their large number and the joints between them, tend towards a circumferential section, but only in tendency, given that in reality the column produced is of a polygonal section, although with a considerable number of sides, corresponding to the number of plates or strips employed.
- In an attempt to simplify the construction process of this formwork tending to wards a cylindrical shape, invention patent 200001776 envisages that the rigid bands fixed using adhesive strips of the above patent are replaced by a single board, also with a plastic-coated internal surface, which is subjected to a number of longitudinal cuts on its external surface to permit the required deformation thereof, so that, in turn, it may be transformed from its original, flat configuration into a cylindrical configuration. However, these cuts or slots in its external surface make the board deform in an irregular manner, obviously most accentuated on the lines corresponding to said cuts which, in practice , entails that the final result is not a perfect cylinder either, but rather that its section is also polygonal.
- Finally, the following are also worthy of note: invention patent No. 9902893 "Machine for applying fibreglass reinforcement to disposable formwork for columns", which is complemented by Invention Patent application "Formwork for prismatic or cylindrical columns" with application number 200002631, also of the applicant, which envisages that the surrounding fibreglass mesh that gives the formwork the necessary mechanical resistance be replaced by a strip of a self-adhesive nature, consisting of paper or similar, wherein the fibreglass threads would be embedded and which exclusively adopt a longitudinal arrangement (instead of forming a mesh) which, after wrapping said strip on the formwork, makes the fibreglass threads adopt an appreciably transversal arrangement with respect to the formwork's axis, thus eliminating longitudinal threads that, due to their own situation, are inoperative according to the pursued object.
- The disposable formwork proposed by the invention, starting from the basic premise of the abovementioned patents, i.e. establishing a tubular body reinforced externally through fibreglass threads, either in the shape of a mesh or embedded in a paper or similar support allowing the production of a perfectly cylindrical column, meaning a perfectly circular section, with an absence of any type of edge or roughness in its surface.
- For this purpose, and in a more specific manner, the formwork is structured using a smooth rigid plastic plate, such as, for example, made of high impact polystyrene (HDPE) or other similar material, a plate that adopts a perfectly cylindrical configuration when wrapped around an inflatable assembly core, obviously of a cylindrical configuration and with an external diameter equal to the diameter of the concrete column to be produced, joining the two complementary edges of said smooth plastic plate using self-adhesive tape.
- Optionally, and to avoid problems of deformities on this joint line, as a result of the weakness thereof, it has been contemplated to place , on the external face of the tubular body corresponding to said connection line, a strip of the same material, of about 4 or 5 cm wide and the same length as the formwork and also fixed using one or two self-adhesive tapes.
- The thus produced tubular body is complemented with the external surround structure based on fibreglass threads, whether in the shape of a mesh or independent threads embedded in a paper support or similar.
- The elasticity of the rigid plastic used allows its transformation into a cylinder without the need for making cuts in its external surface or any other type of manipulations and said smooth plate, precisely because of its continuous thickness, ensures a perfectly cylindrical internal surface for the formwork which, in turn, determines a perfectly cylindrical section, i.e. not polygonal, for the column to be produced.
- Obviously, the inflatable nature of the assembly core that has been referred to above has the purpose of facilitating the latter's disassembly once the formwork has been produced by deflating said core.
- To complement the description that is being made and with the aim of contributing to a better understanding of the invention's specifications, following a preferred practical embodiment thereof, a set of drawings is included as an integral part of said description, which, by way of illustration but not delimitation, show the following:
- Figure 1.-
- Shows the flat and smooth surface rigid plastic plate, which is used to produce the disposable formwork that is the object of this invention
- Figure 2.-
- Shows the same flat plate of the figure above, duly fitted to the assembly core, according to a cross- section close-up.
- Figure 3.-
- Shows an enlarged detail of the above figure corresponding to the area where said smooth plate closes in on itself, in the specific event of said closure being realised simply with the help of an adhesive tape.
- Figure 4.
- Shows a detail similar to that of the above figure, but a reinforcing strip of the new material forming the smooth plate is used in the joint, in addition to said adhesive tape.
- In view of the described figures and especially figure 1, we can see that in order to produce the disposable formwork proposed by the invention a smooth plate (1) of rigid plastic is used, such as, for example, rectangular, high impact polyethylene, , with a length equal to the envisaged height of the column to be produced, with a width in turn coinciding with the evolution of the section of said column, in other words with said section's circumference.
- This plastic plate (1) is arched or wrapped around an assembly core (2), cylindrical, formally and dimensionally coinciding with the column to be produced, in such a way that the plate (1) comes back into contact with itself along its longitudinal or vertical edges (3-3') adopting a tubular and perfectly cylindrical shape, which is stabilised , in principle , with the help of adhesive tape (4) as shown in the enlarged detail of figure 3.
- Nonetheless, it has been envisaged that in order to avoid the tubular body configured by said plate (1) becoming weakened at the level of the joint (3-3'), a reinforcing strip (5) may be applied externally, of the same rigid plastic as the plate (1) and length coinciding with length thereof, that is fixed to it with the help of a pair of adhesive tapes (4-4') or a much wider single adhesive tape, as shown in the detail of figure 4, a strip (5) that may have a varying width but , for the pursued object, can have a size between 4 and 5 cm.
- In any event, the tubular body thus produced is externally reinforced with the classic helicoidal casing on the basis of a fibreglass mesh or a series of fibreglass threads embedded longitudinally and equidistantly on a paper support or similar, to provide the tubular body, and especially the joint (3-3') thereof, with the appropriate stability and mechanical resistance against radial pressure exerted by the concrete when poured inside the formwork, obviously after first removing the core (2) used during its assembly, and whose inflatable nature allows for an incredibly fast and simple disassembly.
Claims (3)
- Disposable formwork for circular section columns of the type incorporating a tubular body constituting the surface of the formwork, stabilised by an external casing consisting of a helicoidal band, either materialised in fibreglass mesh or in a series of fibreglass threads arranged longitudinally and equidistantly in a support of paper or similar, characterised in that said tubular body consists of a smooth plate (1) of rigid plastic, such as, for example , rectangular high impact polyethylene or similar, with a length that coincides with the envisaged height of the column and a width in turn corresponding to the development of the circular section of said column, a plate that is arched and closes in on itself along its longitudinal or vertical edges (3-3') with the help of an adhesive external tape (4) that joins said edges, configuring a tubular and cylindrical body, which is stabilised by means of the external fibreglass.
- Disposable formwork for circular section columns, according to claim 1, characterised in that optionally on the closing line (3-3') of the smooth plate on itself, there is an external strip (5) of the same rigid plastic, of about 4 or 5 cm wide, of a length coinciding with the length of the formwork, which reinforces said closing line and is fixed to the smooth plate also with the help of one or two adhesive tapes (4-4').
- Disposable formwork for circular section columns, according to previous claims, characterised in that the smooth and initially flat plate (1) is transformed into a cylindrical element with the help of an assembly core (2), cylindrical, formally and dimensionally coinciding with the column to be produced and inflatable in order to facilitate its subsequent disassembly.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200201340A ES2197017B1 (en) | 2002-06-11 | 2002-06-11 | DISPOSABLE FORMWORK FOR COLUMNS WITH CIRCULAR SECTION. |
ES200201340 | 2002-06-11 | ||
PCT/ES2003/000275 WO2003104586A1 (en) | 2002-06-11 | 2003-06-06 | Disposable formwork for columns having a circular section |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1553245A1 true EP1553245A1 (en) | 2005-07-13 |
Family
ID=29724725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03757079A Withdrawn EP1553245A1 (en) | 2002-06-11 | 2003-06-06 | Disposable formwork for columns having a circular section |
Country Status (11)
Country | Link |
---|---|
US (1) | US20050247852A1 (en) |
EP (1) | EP1553245A1 (en) |
JP (1) | JP2005529259A (en) |
KR (1) | KR20050004268A (en) |
CN (1) | CN1653239A (en) |
AU (1) | AU2003242788A1 (en) |
BR (1) | BR0305099A (en) |
CA (1) | CA2486149A1 (en) |
ES (1) | ES2197017B1 (en) |
MX (1) | MXPA04011490A (en) |
WO (1) | WO2003104586A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8313080B2 (en) * | 2007-02-15 | 2012-11-20 | Abzac Canada Inc. | Retaining device for assembling two panels, recyclable formwork for forming a concrete structure and packaging assembly using the same |
WO2008098372A1 (en) | 2007-02-15 | 2008-08-21 | Abzac Canada Inc. | Retaining device for assembling two panels, recyclable formwork for forming a concrete structure and packaging assembly using the same |
WO2009079702A1 (en) * | 2007-12-21 | 2009-07-02 | Ezytube Pty Limited | Multi-part tube and method of assembly |
KR101151344B1 (en) * | 2011-07-22 | 2012-06-08 | 이피아이주식회사 | Paper formwork |
CN107675879A (en) * | 2017-11-21 | 2018-02-09 | 成都市绿洲节水灌溉工程有限公司 | A kind of landscape post former fixed by neck |
CN107829558A (en) * | 2017-11-21 | 2018-03-23 | 成都市绿洲节水灌溉工程有限公司 | A kind of landscape post pouring molding device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2783173A (en) * | 1954-07-01 | 1957-02-26 | Resistoflex Corp | Method of making laminated tubing |
US3357457A (en) * | 1964-04-30 | 1967-12-12 | Hughes Aircraft Co | Collapsible tubular structure |
US3942753A (en) * | 1973-07-11 | 1976-03-09 | Sachs Carrol C | Pneumatic means for production of molded structures |
US3956437A (en) * | 1973-07-16 | 1976-05-11 | Ellis Joseph O | Method and apparatus for casting a concrete column |
US4255071A (en) * | 1979-08-27 | 1981-03-10 | Bochumer Eisenhutte Heintzmann Gmbh & Co. | Supporting of excavation roofs |
US4347090A (en) * | 1980-10-24 | 1982-08-31 | Bunnell Plastics, Inc. | Process for forming laminated pipe |
CA1217949A (en) * | 1984-02-20 | 1987-02-17 | Paul Goodwin | Concrete forming apparatus and method of manufacturing same |
ES285757Y (en) * | 1985-03-29 | 1986-05-16 | Rochette Carton Transforme,S.A. | CONCRETE PIPE FOR CONCRETE |
CH684492A5 (en) * | 1991-11-25 | 1994-09-30 | Construmat Ag | Formwork for concrete columns. |
FR2775924B1 (en) * | 1998-03-10 | 2000-04-14 | Inteiss | MOLD PRODUCED USING AT LEAST ONE INFLATABLE STRUCTURE |
-
2002
- 2002-06-11 ES ES200201340A patent/ES2197017B1/en not_active Expired - Fee Related
-
2003
- 2003-06-06 EP EP03757079A patent/EP1553245A1/en not_active Withdrawn
- 2003-06-06 JP JP2004511636A patent/JP2005529259A/en active Pending
- 2003-06-06 CA CA002486149A patent/CA2486149A1/en not_active Abandoned
- 2003-06-06 AU AU2003242788A patent/AU2003242788A1/en not_active Abandoned
- 2003-06-06 KR KR10-2004-7019412A patent/KR20050004268A/en not_active Application Discontinuation
- 2003-06-06 BR BR0305099-8A patent/BR0305099A/en not_active IP Right Cessation
- 2003-06-06 CN CNA038113732A patent/CN1653239A/en active Pending
- 2003-06-06 US US10/516,466 patent/US20050247852A1/en not_active Abandoned
- 2003-06-06 WO PCT/ES2003/000275 patent/WO2003104586A1/en not_active Application Discontinuation
- 2003-06-06 MX MXPA04011490A patent/MXPA04011490A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03104586A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2197017A1 (en) | 2003-12-16 |
KR20050004268A (en) | 2005-01-12 |
AU2003242788A1 (en) | 2003-12-22 |
JP2005529259A (en) | 2005-09-29 |
BR0305099A (en) | 2004-07-27 |
CN1653239A (en) | 2005-08-10 |
ES2197017B1 (en) | 2005-02-01 |
US20050247852A1 (en) | 2005-11-10 |
CA2486149A1 (en) | 2003-12-18 |
MXPA04011490A (en) | 2005-08-15 |
WO2003104586A1 (en) | 2003-12-18 |
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