EP2616375B1 - Wickelhülse für bahnmaterial - Google Patents

Wickelhülse für bahnmaterial Download PDF

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Publication number
EP2616375B1
EP2616375B1 EP11728653.4A EP11728653A EP2616375B1 EP 2616375 B1 EP2616375 B1 EP 2616375B1 EP 11728653 A EP11728653 A EP 11728653A EP 2616375 B1 EP2616375 B1 EP 2616375B1
Authority
EP
European Patent Office
Prior art keywords
web
winding core
core
filler
core according
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.)
Not-in-force
Application number
EP11728653.4A
Other languages
English (en)
French (fr)
Other versions
EP2616375A2 (de
Inventor
Steven John Morgan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F1 Core Solutions Ltd
Original Assignee
F1 Core Solutions Ltd
F1 CORE SOLUTIONS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F1 Core Solutions Ltd, F1 CORE SOLUTIONS Ltd filed Critical F1 Core Solutions Ltd
Publication of EP2616375A2 publication Critical patent/EP2616375A2/de
Application granted granted Critical
Publication of EP2616375B1 publication Critical patent/EP2616375B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65H75/04—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
    • 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
    • B65H75/18—Constructional details
    • B65H75/185—End caps, plugs or adapters
    • B65H75/187—Reinforcing end caps
    • 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
    • B65H75/50—Methods of making reels, bobbins, cop tubes, or the like by working an unspecified material, or several materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/512—Cores or reels characterised by the material moulded
    • B65H2701/5122—Plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/512—Cores or reels characterised by the material moulded
    • B65H2701/5126—Particles of fibres, e.g. lignocelluloses material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/513—Cores or reels characterised by the material assembled mainly from rigid elements of the same kind
    • B65H2701/5136—Moulded plastic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/515—Cores or reels characterised by the material assembled from parts made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/515—Cores or reels characterised by the material assembled from parts made of different materials
    • B65H2701/5152—End flanges and barrel of different material
    • B65H2701/51528—Plastic barrel

Definitions

  • This invention relates to a web-winding core. It has particular, but not exclusive, application to a web-winding core for use with a lightweight material, such as tissue paper.
  • DE 296 12 786 U1 discloses a winding core that comprises a tube on which a compressible coating is formed, and a hard surround is formed on the compressible coating.
  • JPH09300488 discloses a large-diameter paper tube by filling a foamed cured resin layer in a gap between an outside paper tube and an inside paper tube whose end parts are fixed with a base.
  • DE-A-31 05 828 discloses a web-winding tube that comprises a paper tube coated with inner and outer layers of synthetic paper.
  • JP H06 239533 A discloses a web-winding core formed as a hollow cylindrical shell, the shell being a sandwich that includes three-layers, the layers including inner and outer skins (10, 40), between which is a filler (20) to which the inner and outer skins are bonded, the filler (20) being formed from a foam material, the inner skin (10) being formed from a reinforced composite material that comprises reinforcing fibres disposed within a polymer matrix.
  • An aim of this invention is to provide a web-winding core that is better optimised for use with a lightweight web material such as tissue paper, and which is no heavier than a cardboard core that it will replace.
  • the invention provides a web-winding core as set forth in claim 1.
  • the core can be sufficiently strong for use as a core for a lightweight web, and which is of a sufficiently low density that the core is not heavier than a conventional cardboard core.
  • a cardboard core has a typical density of 0.75x10 3 - 0.85x10 3 kgm -3 .
  • Embodiments of the present invention can typically save 10-15% of this. (A greater or lesser saving may be achieved while still gaining the advantage of the invention.)
  • the cores have the advantage over cardboard that they are resistant to damage from water, and so can be stored outside.
  • the inner and outer layers may be of similar construction and composition.
  • the reinforcing fibres comprise organic or inorganic materials and may be applied as preformed fabrics, short fibre fabrics or continuous orientated fibres.
  • the fibres may be incorporated into a ballistic fabric. Fibres of aramid are particularly preferable for its resistance to cutting and abrasion. It is also highly desirable to make the core highly resistant to damage low-speed impacts. To this end, fibres of ultra-high molecular weight polyethylene are particularly suitable, because they have a high impact resistance, and resist adhesion from the matrix, which acts to disperse the energy of impact against the core.
  • the fibres may be dry or may be pre-impregnated with an appropriate uncured polymer.
  • the matrix is typically a thermoset or thermoplastic polymer compound that is capable of a high degree of elongation.
  • it may be a modified polyester resin which has a urethane acrylate additive.
  • the inner and/or outer layer may be formed from a hemp fibre.
  • a high proportion of the core will be void space formed either by the use of cellular materials with entrapped air, or low density 3D woven fabrics. This achieves low overall density of the tube wall construction.
  • the filler may be formed from a low-density natural material, such as balsa or cork.
  • a wide range of alternative filler materials can be used, with an aim of achieving a density within the core of 0.3-0.6x10 3 kgm -3 .
  • An example is foamed PET formed as a lightweight 3-dimensional core.
  • the filler is bonded to the inner and outer layers so that the filler transmits stresses between the inner and the outer layers.
  • the filler is partially or wholly impregnated with the matrix of the inner and/or outer layers to form a strong bond between them, by effectively unifying the three layers of the wall.
  • the resin system proposed for the core tubes is a high grade modified polyester resin which has a urethane acrylate additive to impart very good impact resistant properties to the tube. This has already been extensively trialled in the resin transfer moulding process and gives very good cycle times and product quality.
  • a ring of impact-resistant material e.g., metal, such as steel, or a plastic material such as urethane polymer, may be provided at an end portion of the core to resist damage to the core, for example as might occur though impact.
  • the ring will typically be bonded to one or both of the inner and the outer layers. Most preferably, the inner and outer diameters of the ring are substantially the same as the respective diameter of the core.
  • the core may include end portions in each of which there is a reinforcing structure that increases the hoop strength of the core.
  • the reinforcing structure may comprises a strengthening tape wound around the inner layer.
  • a core for winding a lightweight web is formed as a generally cylindrical hollow cylindrical tube that is rotationally symmetrical about a longitudinal axis X-X.
  • the outer diameter of the cylinder is typically in the range 150-510mm
  • the wall thickness of the tube is typically in the range 12-20mm.
  • the cylindrical tube is formed with three radially-spaced layers that are disposed coaxially around the axis X-X: an inner layer 12, an outer layer 14 and a low-density reinforcing filler 16 that fills the space between the inner layer 12 and the outer layer 14.
  • the inner and outer layers 12, 14 are bonded to the filler 16 to form a composite sandwich structure.
  • the thicknesses of the inner and outer layers of the wall are typically in the range 1.5-4 mm, and the thickness of the filler is typically in the range 8-16 mm.
  • the filler 16 serves to link the inner and outer layers 12, 14 and will transmit stresses between the layers 12, 14 to provide a stable structure.
  • the inner and outer layers 12, 14 are formed from reinforcing fibres which are impregnated with, and embedded in, a matrix of thermoset or thermoplastic polymer compound.
  • the fibres are ultra-high molecular weight polyethylene
  • the matrix is a polyester resin which has a urethane acrylate additive
  • the filler is an expanded hexagonal segment PET foam core.
  • the sandwich core portion of the tube is formed from a cellular or foam material which is bonded between the inner and outer skins of the tube and is partially or wholly impregnated with the polymer matrix compound.
  • a high proportion of the core will be void space formed either by the use of cellular materials with entrapped air, or low density 3D woven fabrics. This is key to achieving low overall density of the tube wall construction.
  • the filler is polyethylene terephthalate (PET) foam formed as flexibly interconnected hexagonal units.
  • the tube wall is formed in layers with internal and external skins containing a reinforcing medium, and a bonded sandwich core portion which is of low density material.
  • the sandwich core serves to link the two skins and will transmit stresses between the skins to provide a stable structure.
  • the skins are formed from reinforcing fibres which are impregnated with, and embedded in, a matrix of thermoset or thermoplastic polymer compound.
  • the reinforcing fibres may be of organic or inorganic materials and may be applied as preformed fabrics, short fibre fabrics or continuous orientated fibres.
  • the fibres may be dry or may be pre-impregnated with an appropriate uncured polymer as described.
  • This central cylinder 20 is mounted concentrically with an outer metal mould shell 22, with an annular space 24 between the central cylinder 20 and the outer mould shell 22 equal to the design wall-thickness of the finished core tube 10.
  • a highly polished finish is required on this central cylinder and it is treated with a release agent to ensure that the resin will not be able to adhere to the surface.
  • the external mould shell 22 is split along its longitudinal centreline at 30 into two identical half shells which are precisely located relative to each other to form an accurate hollow cylindrical mould shell equal in diameter to the outside diameter of the core tube 10 to be formed.
  • This external mould shell 22 is provided with stiffeners (not shown) to ensure good dimensional stability of the structure, to provide the close dimensional tolerances required in the finished core tube 10.
  • Sealing rings 32 are fitted to the central cylinder at a distance apart which is equal to the required length of the finished core tube 10.
  • the longitudinal seams of the outer mould shell also incorporate airtight seals which are essential to the correct functioning of the mould.
  • a number of resin entry ports 34 and air venting points 36 are incorporated into the outer mould shell 22 to ensure that liquid resin can be introduced into the annular space 24 between the inner cylinder 20 and the outer split mould shell 22, and that air can be vented from the space 24 as the mould is filled.
  • the air may be displaced naturally by the ingress of the resin or a small level of vacuum may be applied through the air vent ports 36 to improve the resin flow into the mould.
  • the inner cylinder 20 is prepared by wrapping a layer of dry fibre fabric onto the surface between the two pre-located sealing rings 32 which determine the overall length of the core tube 10.
  • a dry layer of the selected foam core medium is then applied to cover the inner glass fabric.
  • This foam may be applied in sheets which are thermally preformed or may be applied as a spirally-wound or convolute-wound strip, depending upon the material selected.
  • another layer of dry fibre fabric is applied over the entire surface.
  • the prepared inner cylinder 20 with the dry materials is then located within the lower half of the split external mould 22.
  • the upper half of the external mould 22 is then accurately located onto the lower half mould trapping the internal cylinder 20 and the dry fabric and foam layers into the closed mould space.
  • a resin metering and pumping unit prepares a pre-determined quantity of liquid polyester resin with the appropriate curing agents added, and then pumps this mixed resin into the mould through one or more of the ingress ports 34 on the outer mould surface. Air venting or vacuum may be used to promote the resin flow through the mould and resin is pumped into the mould until all the air is displaced and resin flows from the air venting port 36.
  • Elevated temperature can be advantageous as it will speed up the curing reaction of the resin. Elevated temperature can readily be applied by pumping hot water or oil through the central cylindrical 20 member or by incorporating heating elements within the wall of the mould during construction.
  • the outer mould may be unsealed and split open and the cylindrical inner mould 20 with the laminated core tube may be removed from the assembly.
  • the moulded core tube 10 is then drawn off the internal cylinder with a mechanical or hydraulic pulling device.
  • the finished tube should need minimal second operation works to make it ready for despatch.
  • the possible removal of flash lines along the mould split lines may be necessary.
  • Some applications of cores embodying the invention may favour a textured external and/or internal surface on the core tube. This may be formed directly using the mould itself Alternatively the required internal and external surface textures may be applied by wrapping peel ply or similar textured fabric onto the central cylindrical mould member prior to applying the inner structural fabric layers, and/or onto the outer surface of the external layers of structural fabrics. The texture of the fabric is thereby transferred to the surface of the core. Use of such fabric has an additional advantage, in that it prevents the formation of mould flash, which obviates any need to remove such flash from the moulded core. There is some risk of the core tube edges spalling in the event of severe impact - typically if accidentally dropped during handling operations.
  • a modification to the mould tooling has been incorporated within the initial design to permit a protective body 40 of tough material such as metal or urethane polymer to be bonded or moulded within to an end portion of the core tube 10 to enhance the impact resistance if required, as shown in Figure 5 .
  • This may be done by routing a cylindrical groove in an end face of the filler, and forming the protective body 40 by moulding it in situ. The material of the protective body flows into the groove to retain the protective body 40 in place.
  • the groove may be formed with a dovetail shape, as shown in the lower half of Figure 5 .
  • the protective body 40 has a cylindrical locating portion 42 that is a close fit between the inner and the outer layers 12, 14. An end portion of each of the inner and outer layers 12, 14 projects beyond the end of the filler 16 to accommodate the locating portion 42, which is bonded to them.
  • the protective body projects beyond the inner and outer layers 12, 14, and has an outer diameter that is substantially the same as that of the core tube 10.
  • the protective body 40 has an axial through bore that has a diameter that is substantially the same as the inner diameter of the core tube 10. This arrangement ensures that the core as a whole has a substantially uniform inner and outer diameter along its length.
  • An outer portion of the bore of the protective body, shown at 44, is chamfered to provide a lead-in to assist the insertion of handling apparatus into the bore of the core.
  • additional strengthening can be applied to resist bursting of end portions of the core tube 10.
  • the aim is to increase the hoop strength of the core tube 10 at a region close to each of its ends. This is achieved in the present embodiment by omitting the filler 16 from a region at the end of the core tube 10 approximately 50 mm in length.
  • the inner layer 12 is encircled by a strengthening band 44 to the same depth as the filler 16.
  • the strengthening band 44 is formed from unidirectional glass tape, which has high tensile strength along its length.
  • slots 50 are formed into the annular end surface of the strengthening band 44 that is exposed at the end of the core tube 10.
  • an entry hole is formed of 9mm diameter and 12 mm depth at a radius of approximately 212 mm from the centre of the core tube 10.
  • the slot 50 is formed with a parallel cutter 6 or 7 mm in diameter, extending from the entry hole in an arc centred on the centre of the core tube 10.
  • the slot 50 is then expanded with a dovetail cutter.
  • the dovetail cutter enters the entry hole and moves along the previously formed slot.
  • the dovetail cutter expands the slot such that it is approximately 7 mm in with at the surface and 9 mm in the base.
  • each slot is approximately 40 mm, and they are spaced apart by approximately 10 mm.
  • the lower part of the section is shown through the dovetailed part of the slot and the upper part of the section is shown through the space between the slots 50. This provides secure keying of the protective body 44 while maintaining the structural integrity of the core tube 10.
  • the dimensions are specific to this embodiment and may be scaled as appropriate.

Claims (11)

  1. Wickelhülse für Bahnmaterial, die als ein hohler zylindrischer Mantel ausgebildet ist, wobei der Mantel eine Schichtanordnung ist, die drei Schichten umfasst, wobei die Schichten Innen- und Außenhäute (12, 14) umfassen, zwischen welchen ein Füllstoff (16) ist, an welchen die Innen- und Außenhäute gebunden sind, wobei der Füllstoff (16) aus einem synthetischen porösen Polymer oder einem Schaumstoffmaterial gebildet ist; dadurch gekennzeichnet, dass die Innen- und/oder die Außenhäute (12, 14) aus einem verstärkten Verbundmaterial gebildet sind, das Verstärkungsfasern umfasst, die innerhalb einer Polymermatrix angeordnet sind; und dadurch dass der Füllstoff (16) ganz oder teilweise mit einer Matrix der Innen- und Außenschichten imprägniert ist, und dadurch, dass die Fasern eines von Aramid, Polyethylen mit ultrahoher Molmasse oder Hanf sind.
  2. Wickelhülse für Bahnmaterial nach Anspruch 1, wobei die Verstärkungsfasern in der Form eines vorgeformten Gewebes, eines Kurzfasergewebes oder als ausgerichtete Endlosfasern sind.
  3. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, wobei die Fasern mit einem geeigneten unvernetzten Polymer vorimprägniert sind.
  4. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, wobei die Matrix ein modifiziertes Polyesterharz umfasst, das ein Urethanacrylatadditiv aufweist.
  5. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, wobei der Füllstoff (16) ein dreidimensionaler PET-Kern ist.
  6. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, wobei der Füllstoff (16) Kork oder Balsa ist.
  7. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, wobei der Füllstoff (16) eine Dichte im Bereich von 0,3 bis 0,6 x 103 kgm-3 aufweist.
  8. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, ferner umfassend einen Ring (40) aus elastischem Material, der an einem Endabschnitt der Hülse vorgesehen ist, um Beschädigung der Hülse zu widerstehen, wobei der Ring (40) an eine oder beide der Innen- und Außenschichten (12, 14) gebunden ist, und der Ring (40) einen Innen- und Außendurchmesser aufweist, der im Wesentlichen gleich wie der jeweilige Durchmesser der Hülse (10) ist.
  9. Wickelhülse für Bahnmaterial nach Anspruch 8, wobei der Ring (40) ein elastisches Polymer ist, das auf der Hülse (10) geformt ist.
  10. Wickelhülse für Bahnmaterial nach Anspruch 9, wobei ein Schlitz (50), der in eine Endfläche der Hülse (10) gebildet ist, um einen Schlüssel bereitzustellen, in welchem der Ring (40) geformt werden kann.
  11. Wickelhülse für Bahnmaterial nach einem der vorhergehenden Ansprüche, dadurch dass sie Endabschnitte umfasst, wobei in jeden von ihnen eine Verstärkungsstruktur (44) um die Innenschicht (12) gewickelt ist, welche die Ringsteifigkeit der Hülse erhöht.
EP11728653.4A 2010-06-11 2011-06-10 Wickelhülse für bahnmaterial Not-in-force EP2616375B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1009779.8A GB2481058A (en) 2010-06-11 2010-06-11 Three layered web-winding core
PCT/GB2011/051084 WO2011154745A2 (en) 2010-06-11 2011-06-10 Web-winding core

Publications (2)

Publication Number Publication Date
EP2616375A2 EP2616375A2 (de) 2013-07-24
EP2616375B1 true EP2616375B1 (de) 2016-02-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11728653.4A Not-in-force EP2616375B1 (de) 2010-06-11 2011-06-10 Wickelhülse für bahnmaterial

Country Status (3)

Country Link
EP (1) EP2616375B1 (de)
GB (1) GB2481058A (de)
WO (1) WO2011154745A2 (de)

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US10843892B2 (en) 2017-09-12 2020-11-24 Michael Van Deurse Winding core end protector

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CN103130039B (zh) * 2013-02-19 2016-12-28 桐乡市德盛纸业有限公司 泥浆复合纸管及其制造方法
US9481536B2 (en) * 2014-02-07 2016-11-01 Aep Industries Inc. Cylindrical sleeve
US9731932B2 (en) 2014-02-07 2017-08-15 Berry Global Films, Llc Cylindrical sleeve
PL3233688T3 (pl) * 2014-12-19 2019-07-31 Essity Operations France Rozdzieralny rdzeń, rolka zawierająca taki rdzeń i sposób wytwarzania rozdzieralnego rdzenia
EP3663247B1 (de) * 2018-12-06 2022-01-26 Double E Company LLC Wickelkernendschutz

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Publication number Priority date Publication date Assignee Title
US10843892B2 (en) 2017-09-12 2020-11-24 Michael Van Deurse Winding core end protector

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Publication number Publication date
WO2011154745A3 (en) 2012-02-23
EP2616375A2 (de) 2013-07-24
WO2011154745A2 (en) 2011-12-15
GB201009779D0 (en) 2010-07-21
GB2481058A (en) 2011-12-14

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