EP2764960B1 - Assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements - Google Patents

Assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements Download PDF

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Publication number
EP2764960B1
EP2764960B1 EP14154278.7A EP14154278A EP2764960B1 EP 2764960 B1 EP2764960 B1 EP 2764960B1 EP 14154278 A EP14154278 A EP 14154278A EP 2764960 B1 EP2764960 B1 EP 2764960B1
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EP
European Patent Office
Prior art keywords
tubular element
assembly
axis
arm
roto
Prior art date
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Active
Application number
EP14154278.7A
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German (de)
French (fr)
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EP2764960A1 (en
Inventor
Giovanni Gambini
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.)
Gambini International SA
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Gambini International SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/58—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable arm or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/04—Modelling plastic materials, e.g. clay
    • B44C3/046—Modelling plastic materials, e.g. clay using a modelling surface, e.g. plate
    • B44C3/048—Modelling plastic materials, e.g. clay using a modelling surface, e.g. plate applying an additional decorative element, e.g. picture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers

Definitions

  • the present invention refers to an assembly for subdividing an advancing continuous tubular element into a plurality of independent tubular elements.
  • the continuous tubular element is obtained with a helical winding of strips of ribbon-shaped material, usually paper or cardboard, which are glued to one another.
  • tubular element is generated through the winding of the aforementioned strips, when advancing the tubular element also provides for rotating around its longitudinal axis.
  • tubular elements act as an internal core for rolls of toilet paper, rolls of kitchen paper, rolls of adhesive tape or more.
  • all these machines comprise one or more mobile cutting elements that are capable of intercepting the advancing tubular element and obtaining a separation line along the tubular element through cutting, again while it is advancing.
  • the continuous tubular element By cyclically making these discontinuities or cutting lines, the continuous tubular element, while it advances, is thus subdivided into a plurality of independent tubular elements.
  • a first known solution described for example in US5873806 , discloses the use of a slide structure for supporting the cutting members. This slide is mobile with an alternating forward and backward translational movement parallel to the tubular element to be subdivided.
  • Patent application IT2003FI00155 starting from the same solution as AU3021067 with cutting members that are mounted on a rotating arm, also tackles the problem of making a cyclical rotating structure that at the same time makes it possible to keep the cutting members orthogonal with respect to the tubular element to be subdivided.
  • solutions proposed in IT2003FI00155 consist of incorporating an oscillating actuator on the rotating arm that acts on the cutting member, or in comprising a second rotating arm that is associated with the end of the first one by means of a toothed wheel.
  • a toothed wheel is configured so as to keep the cutting members orthogonal with respect to the tubular element during the rotations of the two arms in series.
  • EP1810798 upon which the preamble of claim 1 is based, discloses a machine for cutting soap bars into portions if preset length having a roto-translating movable arm provided with cutting means.
  • the purpose of the present invention is that of making an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements that is an alternative to those known today and that is capable of solving the drawbacks mentioned above in an extremely simple, cost-effective and particularly functional manner.
  • Another purpose is that of providing an alternative solution for the problem, on one hand, of having a support for the cutting members that is cyclically moved without oscillating movements and on the other hand that of keeping the cutting members always orthogonal to the axis of the tubular element to be subdivided.
  • reference numeral 10 indicates an embodiment of an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements according to the present invention.
  • Such an assembly 10 is of the type comprising a cutting device 12 that is integrally borne by a movable arm 13.
  • this arm 13 is mobile in such a manner that cyclically the cutting device 12 defines a circular cutting path T which intersects at least partially the tubular element 11 in order to subdivide it into the tubular elements 11'.
  • the arm 13 integrally bearing the cutting device 12 is roto-translating in such a manner that the cutting device 12 is always parallel to itself along the entire circular cutting path T and is orthogonal to the axis A of the tubular element 11.
  • the cutting device 12 comprises a motorized 14 disc-shaped knife 12 that is rotatable about its own central axis B where, according to what has previously been described, such an axis B remains parallel to the axis A of the tubular element 11 along the entire circular cutting path T.
  • the circular cutting path T intersects the tubular element 11, also including its theoretical extension, in at least two points 15, 16 until substantially reaching the axis A in the centreline of the cutting operations.
  • Figure 1 shows the three positions of the knife 12 at the intersection points 15, 16, as well as at the centreline.
  • the tubular element 11 is not provided with inner spindle and therefore the knife 12 can penetrate inside the tubular element until it reaches the axis A, thus ensuring an optimal cut.
  • the roto-translating arm 13 is part of a mobile articulated quadrilateral structure comprising, in addition to the arm 13, two connecting rods 17, 18.
  • Such connecting rods 17, 18 are rotatable about fixed pins 19, 20 and are hinged at an end 21, 22 to the roto-translating arm 13.
  • the fourth side of the quadrilateral is considered to consist of the fixed reference to which the pins 19, 20 are constrained.
  • the tubular element 11 and the cutting device 12 advance in a synchronised manner.
  • the rototranslation of the arm 13 can be also carried out at greater speeds.
  • the fixed pins 19, 20 for rotating the connecting rods 17, 18 are vertically aligned along a direction that is orthogonal to the axis A of the tubular element 11. Also the roto-translating arm 13 is substantially vertical and orthogonal to the axis A of the tubular element 11.
  • the roto-translating arm 13 could also be inclined, whereas the knife 12 must remain orthogonal with respect to the axis A of the tubular element 11.
  • the abutment and containment support 26 indeed acts as a stabiliser of the tubular element 11 that is not provided with internal supports of the spindle type.
  • the cutting device 12 preferably of the disc-shaped knife 12 type, is integral with a roto-translating arm 13 which, together with the connecting rods 17, 18 is part of an articulated quadrilateral that is set in motion by motorized belts.
  • an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements achieves the previously highlighted purposes.
  • the solution described indeed solves the requirement of carrying out a rotating cut that is orthogonal to the material to be cut, overcoming all the problems related to the rotating movement of the knife assembly.
  • the solution moreover has the advantage of associating, with the knife, a high-performance electric motor that is capable of ensuring an optimal cut.
  • another advantageous aspect of the assembly described by the present invention is the fact that there is no guide element inside the tubular element. This leads to an absence of vibration on the tubular element during the cut since the inner guide element is only limited to the initial formation portion of the tubular element.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Prostheses (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Nonmetal Cutting Devices (AREA)

Description

  • The present invention refers to an assembly for subdividing an advancing continuous tubular element into a plurality of independent tubular elements.
  • In particular the continuous tubular element is obtained with a helical winding of strips of ribbon-shaped material, usually paper or cardboard, which are glued to one another.
  • Indeed due to the fact that the tubular element is generated through the winding of the aforementioned strips, when advancing the tubular element also provides for rotating around its longitudinal axis.
  • In general tubular elements in paper or cardboard obtained by cutting a common continuous tubular element are nowadays incorporated in various different products present on the market.
  • For example these tubular elements act as an internal core for rolls of toilet paper, rolls of kitchen paper, rolls of adhesive tape or more.
  • Nowadays different machines are known for subdividing continuous tubular elements as described above into a plurality of independent tubular elements.
  • In general, all these machines comprise one or more mobile cutting elements that are capable of intercepting the advancing tubular element and obtaining a separation line along the tubular element through cutting, again while it is advancing.
  • By cyclically making these discontinuities or cutting lines, the continuous tubular element, while it advances, is thus subdivided into a plurality of independent tubular elements.
  • According to what is described above it is therefore necessary to provide for cyclically bringing back the cutting members into a position such as to again intercept the tubular element advancing at a precise distance from the cut previously made.
  • Nowadays, different solutions are known that are proposed with respect to this requirement.
  • A first known solution, described for example in US5873806 , discloses the use of a slide structure for supporting the cutting members. This slide is mobile with an alternating forward and backward translational movement parallel to the tubular element to be subdivided.
  • This solution however is now considered outdated in view of the continuous growth in hourly production. Indeed as the speed increased, on the translating slide there were high inertia forces and consequent vibrations that were not optimal for controlling the cutting.
  • In order to avoid such drawbacks, nowadays, rotating supports are known at the end of which the cutting member is mounted. One example of such a solution is described in AU3021067 , in which there is no forward and backward movement, but rather a continuous circular movement of the support of the cutting members. However, such a solution has the drawback that the cutting members, in particular knives, are not always in a position that is orthogonal with respect to the axis of the continuous tubular element. This angle of incidence of the blade which is not orthogonal with respect to the tubular element makes the cutting poor in terms of precision, leaving cutting residue on the subdivided tubular elements.
  • Patent application IT2003FI00155 , starting from the same solution as AU3021067 with cutting members that are mounted on a rotating arm, also tackles the problem of making a cyclical rotating structure that at the same time makes it possible to keep the cutting members orthogonal with respect to the tubular element to be subdivided.
  • In particular the solutions proposed in IT2003FI00155 consist of incorporating an oscillating actuator on the rotating arm that acts on the cutting member, or in comprising a second rotating arm that is associated with the end of the first one by means of a toothed wheel. Such a toothed wheel is configured so as to keep the cutting members orthogonal with respect to the tubular element during the rotations of the two arms in series.
  • It is clear that the two solutions proposed above are difficult to make, as well as being not very reliable. Indeed, in order to achieve the required result, it must be provided for there to be rotating joints both on the first arm, and on the second one, making the process mechanics very complex.
  • EP1810798 , upon which the preamble of claim 1 is based, discloses a machine for cutting soap bars into portions if preset length having a roto-translating movable arm provided with cutting means.
  • The purpose of the present invention is that of making an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements that is an alternative to those known today and that is capable of solving the drawbacks mentioned above in an extremely simple, cost-effective and particularly functional manner.
  • Another purpose is that of providing an alternative solution for the problem, on one hand, of having a support for the cutting members that is cyclically moved without oscillating movements and on the other hand that of keeping the cutting members always orthogonal to the axis of the tubular element to be subdivided.
  • These purposes according to the present invention are achieved by making an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements as outlined in claim 1.
  • Further characteristics of the invention are highlighted in the dependent claims.
  • In general the problems highlighted are overcome by housing the cutting members on a roto-translating arm so that the cutting end describes a circular path T, while remaining however always orthogonal to the axis of the tubular element to be subdivided.
  • In particular such a roto-translating movement is generated by a motorized articulated quadrilateral.
  • The characteristics and the advantages of an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements according to the present invention shall become clearer from the following description, given as an example and not for limiting purposes, with reference to the attached schematic drawings, in which:
    • figure 1 is a side view of an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements according to the present invention;
    • figure 2 is a front view of the assembly of figure 1; and
    • figures 3 and 4 are views of the assembly of figure 1 in different configurations of use.
  • With reference to the figures, reference numeral 10 indicates an embodiment of an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements according to the present invention.
  • Such an assembly 10 is of the type comprising a cutting device 12 that is integrally borne by a movable arm 13. In particular this arm 13 is mobile in such a manner that cyclically the cutting device 12 defines a circular cutting path T which intersects at least partially the tubular element 11 in order to subdivide it into the tubular elements 11'.
  • The movement along the circular cutting path T always follows the same direction, in accordance with the advancing of the tubular element 11, and it is never reversed.
  • In particular, according to the invention, the arm 13 integrally bearing the cutting device 12 is roto-translating in such a manner that the cutting device 12 is always parallel to itself along the entire circular cutting path T and is orthogonal to the axis A of the tubular element 11.
  • The cutting device 12 comprises a motorized 14 disc-shaped knife 12 that is rotatable about its own central axis B where, according to what has previously been described, such an axis B remains parallel to the axis A of the tubular element 11 along the entire circular cutting path T.
  • Of course, instead of the disc-shaped knife 12 any other equivalent cutting means can be provided.
  • As shown, the circular cutting path T intersects the tubular element 11, also including its theoretical extension, in at least two points 15, 16 until substantially reaching the axis A in the centreline of the cutting operations.
  • Figure 1 shows the three positions of the knife 12 at the intersection points 15, 16, as well as at the centreline.
  • Due to the rotation of the tubular element 11 about the axis A, by even only partially penetrating the knife 12, a cutting line is carried out along the entire circumference of the tubular element 11.
  • With respect to other known solutions, the tubular element 11 is not provided with inner spindle and therefore the knife 12 can penetrate inside the tubular element until it reaches the axis A, thus ensuring an optimal cut.
  • In particular, the roto-translating arm 13 is part of a mobile articulated quadrilateral structure comprising, in addition to the arm 13, two connecting rods 17, 18. Such connecting rods 17, 18 are rotatable about fixed pins 19, 20 and are hinged at an end 21, 22 to the roto-translating arm 13.
  • The fourth side of the quadrilateral is considered to consist of the fixed reference to which the pins 19, 20 are constrained.
  • In such a way, when the connecting rods 17, 18 are driven in rotation about the fixed pins 19, 20, they impress a rototranslation to the arm 13 and, therefore, to the disc-shaped knife 12.
  • The rotation of the connecting rods 17, 18 about the fixed pins 19, 20 is controlled by motorized 25 belts 23, 24.
  • As known, at least during the cutting steps in the intersection portion the tubular element 11 and the cutting device 12 advance in a synchronised manner. Along the portion T of free path, the rototranslation of the arm 13 can be also carried out at greater speeds.
  • In order to ensure that the cut is orthogonal, the fixed pins 19, 20 for rotating the connecting rods 17, 18 are vertically aligned along a direction that is orthogonal to the axis A of the tubular element 11. Also the roto-translating arm 13 is substantially vertical and orthogonal to the axis A of the tubular element 11.
  • However, the roto-translating arm 13 could also be inclined, whereas the knife 12 must remain orthogonal with respect to the axis A of the tubular element 11.
  • As an accessory device it is provided an abutment and containment support 26 of the tubular element 11 at at least the incident portion of the cutting path T having an opening 27 for permitting the intersection of the disc-shaped knife 12 with the tubular element 11.
  • The abutment and containment support 26 indeed acts as a stabiliser of the tubular element 11 that is not provided with internal supports of the spindle type.
  • It is easy to understand how the assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements object of the invention operates.
  • The cutting device 12, preferably of the disc-shaped knife 12 type, is integral with a roto-translating arm 13 which, together with the connecting rods 17, 18 is part of an articulated quadrilateral that is set in motion by motorized belts.
  • Since the movement of the arm 13 is a rototranslation and since the disc-shaped knife 12 rotates about an axis that is parallel to the axis A of the tubular element 11, it is ensured that the blade 12 is orthogonal along the entire cutting path T in a simple but effective manner.
  • It has thus been seen that an assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements according to the present invention achieves the previously highlighted purposes. The solution described indeed solves the requirement of carrying out a rotating cut that is orthogonal to the material to be cut, overcoming all the problems related to the rotating movement of the knife assembly. The solution moreover has the advantage of associating, with the knife, a high-performance electric motor that is capable of ensuring an optimal cut.
  • Moreover, another advantageous aspect of the assembly described by the present invention is the fact that there is no guide element inside the tubular element. This leads to an absence of vibration on the tubular element during the cut since the inner guide element is only limited to the initial formation portion of the tubular element.
  • The assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements of the present invention thus conceived can undergo numerous modifications and variants, all covered by the same inventive core; moreover, all the details can be replaced by technically equivalent elements. In practice, the materials used, as well as their sizes, can be any according to the technical requirements.

Claims (9)

  1. Assembly (10) for subdividing an advancing continuous tubular element (11) into a plurality of tubular elements (11'), said assembly (10) being of the type comprising a cutting device (12) integrally borne by a movable arm (13), said arm (13) being movable in such a manner that cyclically the cutting end of said cutting device (12) defines a circular cutting path (T) which intersects at least partially said tubular element (11) in order to subdivide it into said tubular elements (11'), said movable arm (13) integrally bearing said cutting device (12) is roto-translating in such a manner that said cutting device (12) along the entire circular cutting path (T) is always parallel to itself and orthogonal to the axis (A) of said tubular element (11); characterized in that said roto-translating arm (13) is part of an articulated quadrilateral structure comprising in addition two connecting rods (17, 18), said connecting rods (17, 18) being rotatable about fixed pins (19, 20) and hinged at an end (21, 22) to said roto-translating arm (13) so that when said connecting rods (17, 18) are driven in rotation about said fixed pins (19, 20) they impress a rototranslation to said arm (13) bearing said disc-shaped knife (12).
  2. Assembly (10) according to claim 1 characterized in that said cutting device (12) comprises a disc-shaped knife (12) rotatable about its own central axis (B), said axis (B) being parallel to said axis (A) of said tubular element (11) along the entire circular cutting path (T).
  3. Assembly (10) according to claim 2 characterized in that said circular cutting path (T) intersects said tubular element (11) in at least two points (15, 16) substantially reaching said axis (A) in the centerline of said intersection points (15, 16).
  4. Assembly (10) according to claim 1 characterized in that the rotation of said connecting rods (17, 18) about said fixed pins (19, 20) is controlled by motorized (25) belts (23, 24).
  5. Assembly (10) according to claim 4 characterized in that said fixed pins (19, 20) for rotating said connecting rods (17, 18) are vertically aligned along a direction orthogonal to said axis (A) of said tubular element (11).
  6. Assembly (10) according to claim 5 characterized in that said roto-translating arm (13) is substantially vertical along a direction orthogonal to said axis (A) of said tubular element (11).
  7. Assembly (10) according to any of the preceding claims characterized in that it comprises an abutment and containment support (26) of said tubular element (11) at at least said incident portion of said cutting path (T).
  8. Assembly (10) according to claim 7 characterized in that said abutment and containment support (26) comprises an opening (27) for permitting the intersection of said disc-shaped knife (12) in said tubular element (11), said tubular element (11) being devoid of internal supports.
  9. Assembly (10) according to any of the preceding claims characterized in that it comprises an electric motor (14) for driving the rotation of said knife (12), said motor (14) being integrally mounted on said roto-translating arm.
EP14154278.7A 2013-02-08 2014-02-07 Assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements Active EP2764960B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000178A ITMI20130178A1 (en) 2013-02-08 2013-02-08 GROUP FOR THE DISTRIBUTION OF A CONTINUOUS TUBULAR IN ADVANCE IN A PLURALITY OF TUBULAR ELEMENTS

Publications (2)

Publication Number Publication Date
EP2764960A1 EP2764960A1 (en) 2014-08-13
EP2764960B1 true EP2764960B1 (en) 2015-11-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14154278.7A Active EP2764960B1 (en) 2013-02-08 2014-02-07 Assembly for subdividing an advancing continuous tubular element into a plurality of tubular elements

Country Status (3)

Country Link
EP (1) EP2764960B1 (en)
ES (1) ES2562019T3 (en)
IT (1) ITMI20130178A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108081341A (en) * 2017-08-16 2018-05-29 广州德智能科技有限公司 A kind of novel environment friendly plastic tube device
CN108068153A (en) * 2017-08-16 2018-05-25 广州德智能科技有限公司 A kind of modified form environmentally-friendly plastic pipe device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3021067A (en) 1968-11-21 1970-05-28 New and improved apparatus for cutting predetermined lengths from spirally wound cardboard tubes
US5873806A (en) 1993-10-08 1999-02-23 Fabio Perini, S.P.A. Machine for producing cardboard or similar tubes, with means for cutting the tube into sections of predetermined lengths
US5557997A (en) * 1994-04-06 1996-09-24 Paper Converting Machine Company Apparatus for transverse cutting
ITFI20030155A1 (en) 2003-05-30 2004-11-30 Perini Fabio Spa MACHINE FOR THE PRODUCTION OF TUBULAR ARTICLES WITH A
ITMI20060098A1 (en) * 2006-01-20 2007-07-21 Binacchi & Co Srl MACHINE FOR CUTTING SOAP BARS IN CUTTINGS OF PREFIXED LENGTH WITH HIGH FLEXIBILITY OF OPERATION
ITFI20070207A1 (en) * 2007-09-14 2009-03-15 Perini Fabio Spa TUBE WITH GROUP TOOTH BELT "

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Publication number Publication date
EP2764960A1 (en) 2014-08-13
ITMI20130178A1 (en) 2014-08-09
ES2562019T3 (en) 2016-03-02

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