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WO2010094780A1 - Panneau d'extrémité métallique muni d'un orifice - Google Patents

Panneau d'extrémité métallique muni d'un orifice Download PDF

Info

Publication number
WO2010094780A1
WO2010094780A1 PCT/EP2010/052159 EP2010052159W WO2010094780A1 WO 2010094780 A1 WO2010094780 A1 WO 2010094780A1 EP 2010052159 W EP2010052159 W EP 2010052159W WO 2010094780 A1 WO2010094780 A1 WO 2010094780A1
Authority
WO
WIPO (PCT)
Prior art keywords
aperture
curl
sheet metal
closure
metal lid
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
Application number
PCT/EP2010/052159
Other languages
English (en)
Inventor
Paul Robert Dunwoody
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.)
Crown Packaging Technology Inc
Original Assignee
Crown Packaging Technology Inc
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 Crown Packaging Technology Inc filed Critical Crown Packaging Technology Inc
Priority to EP10705154A priority Critical patent/EP2398713A1/fr
Priority to US13/202,224 priority patent/US20120118889A1/en
Publication of WO2010094780A1 publication Critical patent/WO2010094780A1/fr
Anticipated expiration legal-status Critical
Priority to US13/835,562 priority patent/US20130206766A1/en
Ceased legal-status Critical Current

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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • B65D17/507—Rigid or semi-rigid members, e.g. plugs moulded in situ, e.g. during production of container
    • B65D17/508—Rigid or semi-rigid members, e.g. plugs moulded in situ, e.g. during production of container and combined with a rigid or semi-rigid, e.g. metallic sheet and a moulded plastic body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5043—Details of preformed openings provided with a flange
    • B65D2517/5045—Down-turned flange, i.e. extending into container
    • B65D2517/5048—Down-turned flange, i.e. extending into container rolled or folded back, e.g. to avoid sharp edges

Definitions

  • the present invention relates to a sheet metal end panel for a container, such as a beverage can, having a hole defined therein, which is adapted to receive a separate closure.
  • the closure is designed to close and seal the hole and may be opened and resealed after each use.
  • EP 1607341 A (TOYO SEIKAN) 21.12.2005 discloses an end comprising a closure member having an opening, that has been formed in advance and an unsealing tab, which is fitted to the outer surface of the closure member so as to cover the opening.
  • the unsealing tab is hermetically adhered to the periphery of the opening and includes a flexible tab member and a plug member integrally adhered thereto, which is adapted to be fitted to the opening provided in the closure member.
  • the flexible tab member is hermetically fixed to the periphery of the opening in the closure member so as to be torn off upon opening.
  • EP 1607341 A TOYO SEIKAN 21.12.2005
  • the edge of the opening in the closure member does not have to be flat, since the tab member is flexible and may accommodate any unevenness in the sealing surface.
  • the opening has to be positioned sufficiently distant from the edge of the closure member in order to provide a sealing surface of sufficient width to provide a hermetic seal. This distance makes drinking from, and to an extent pouring from, the container difficult.
  • the flexible tab member is required because the accuracy of the fit between the plug member and the opening or the smoothness of the surfaces may be insufficient to provide a fluid seal on their own. Once opened, the container may not re-seal, particularly if the contents of the container are pressurised, and leakage of liquid or gas may occur.
  • EP 1640282 B (BALL PACKAGING) 27.12.2006 describes a lid for a container, particularly for contents that are held under pressure.
  • the sheet metal lid has a lid panel surrounded by a folded edge.
  • the panel has a large dimensioned opening, into which a separate reclosing device is fitted.
  • the large dimensioned opening affects the stability of the sheet metal lid and thus a stiffening strip and a reinforcement plateau is provided on the lid.
  • WO 2007/128810 15.11.2007 filed by the present applicants describes a metal can end into which a plastic opening device is fitted and the plastic opening device is arranged to slide relative to an aperture in the metal end panel to open and reclose the aperture.
  • the opening device described in WO 2007/128810 15.11.2007 cannot be applied to the end panel previously described in the prior art, because the sliding path taken by the opening device relative to the metal end panel needs to be unimpeded.
  • the aperture in the metal end panel needs to be designed to provide a smooth sealing surface, against which the separate opening device forms a fluid-tight seal.
  • the present invention provides a sheet metal lid for closing a container body, the lid comprising a centre panel surrounded by a seaming portion adapted to be joined to the periphery of a container body, the centre panel defining an aperture through which the contents of the container may be dispensed, the peripheral edge of the aperture finished by a curl and the aperture adapted to receive a separate closure, characterised in that the closure moves relative to the centre panel between a closed position, in which the aperture and the closure together form a fluid-tight seal, and an open position, in which the seal is broken and the closure slides across the surface of the centre panel to open at least part of the aperture.
  • the invention provides a metal end panel with a hole that can be made rounder, flatter and closer to the panel edge.
  • the edge of the aperture is curled to protect a user from the cut edge of the aperture and the curl provides a stiffened aperture with accurate, smooth sealing surfaces.
  • the end panel is adapted to receive a separate closure, which moves between a closed and an open position. In its closed position, the closure occludes the aperture and forms a fluid-tight seal with the edge of the aperture.
  • the closure Upon opening, the closure slides across the surface of the end panel to expose a major part of the aperture, through which the contents of a filled container onto which the end panel and a separate closure is applied, may be poured or drunk or through which a straw may be inserted.
  • the end panel of the invention is particularly suited to a moveable closure device such as that described in WO 2007/128810 15.11.2007 .
  • the aperture curl is recessed into the plane of the end panel allowing the closure device to be moved across the end panel, away from the aperture, without impedance from the aperture curl into the path of the closure device as it moves to its open position.
  • the end panel is suitable for fixing to a can end or a can body. Sealing is achievable against the bottom of the aperture curl, inside the curl or on the outside portion of the underside of the curl.
  • the curl may depend upwards or downwards from the end panel.
  • Figure 1 is a plan view of an end shell according to the invention.
  • Figure 1A is a cross section view of the end shell shown in figure 1 taken along the line A-A;
  • Figure 1 B is a detailed portion of the cross section view of figure 1A, indicated by circle B, showing a curl around the perimeter of the aperture in the end shell;
  • Figure 1C is portion of the cross section view of figure 1A, indicated by circle C, indicating the distances between various features of the end shell.
  • Figure 2 is an perspective view of a plain end shell blank, which is pressed from metal sheet;
  • Figure 2A is a plan view of the end shell blank illustrated in figure 2;
  • Figure 2B is a side cross section view of the end shell blank illustrated in figure 2A taken along the line A-A;
  • Figure 3 is an perspective view of the end shell blank having a hole punched through the planar centre panel thereof;
  • Figure 3A is a plan view of the end shell blank illustrated in figure 3;
  • Figure 3B is a side cross section view of the end shell blank illustrated in figures 3 and 3A, with an inset detailed view of the portion indicated by the letter B;
  • Figure 4A illustrates tooling suitable for forming a depression around the periphery of the hole in the end shell blank, in a start position, in which the end shell blank is clamped in position and no depression has been formed yet, with an inset detailed view of the portion indicated by the letter D;
  • Figure 4B illustrates the same tooling as illustrated in figure 4A, in a finish position, in which an annular punch has formed a depression around the periphery of the hole in the end shell blank;
  • Figure 5 is an perspective view of the end shell blank having a hole punched through the planar centre panel thereof and a depression formed around the periphery of the hole;
  • Figure 5A is a plan view of the end shell blank illustrated in figure 5;
  • Figure 5B is a side cross section view of the end shell blank illustrated in figures 5 and 5A, with an inset detailed view of the portion indicated by the letter B;
  • Figure 6A illustrates tooling suitable for drawing the raw edge of the hole into the start of a curl, in a start position, in which the end shell blank is clamped in position and no drawing has yet taken place, with an inset detailed view of the portion indicated by the letter E;
  • Figure 6B illustrates the same tooling as illustrated in figure 6A, in a finish position, in which a draw punch has been moved through the hole thereby forming the start of a curl, with an inset detailed view of the portion indicated by the letter E;
  • Figure 7 is a perspective view of the end shell blank having a hole punched through the planar centre panel thereof and the start of a curl formed around the periphery of the hole;
  • Figure 7A is a plan view of the end shell blank illustrated in figure 7;
  • Figure 7B is a side cross section view of the end shell blank illustrated in figures 7 and 7A, with an inset detailed view of the portion indicated by the letter B;
  • Figure 8 is a perspective view of the finished end shell having a hole punched through the planar centre panel thereof and a curl formed around the periphery of the hole;
  • Figure 8A is a plan view of the finished end shell illustrated in figure 8.
  • Figure 8B is a side cross section view of the finished end shell illustrated in figures 8 and 8A, with an inset detailed view of the portion indicated by the letter B;
  • Figure 9 illustrates a first example of tooling suitable for converting the
  • start of a curl shown in figures 7 to 7B, to create a curl, in which the end shell blank is interposed between a coin punch and a coin die which are suitably shaped to coin the final shape and dimensions of the curl;
  • Figure 10 illustrates a second example of tooling suitable for converting the "start of a curl" shown in figures 7 to 7B, to create a curl, in which the
  • start of a curl is supported in a coin die, which is suitably shaped to control the dimensions of the curl formed around the periphery of the hole, when the coin punch is brought into contact with the coin die;
  • Figure 11A illustrates a third example of tooling suitable for converting the
  • start of a curl shown in figures 7 to 7B, to create a curl, in a start position, in which the coin punch and coin die are spaced apart.
  • This tooling is an enhancement of the tooling illustrated in figure 10, in which the end shell blank is placed in the coin die and a clamp is applied around the edge of the hole;
  • Figure 11 B illustrates the tooling shown in figure 11A in a finish position, in which the coin punch has been brought into contact with the coin die, forming a curl of controlled dimensions around the periphery of the hole.
  • a can end 1 according to the invention has a hole 7 through which the contents of the can (not shown in the figures), to which the can end 1 is affixed, may be dispensed from the can by a user and then the can may be closed and re-sealed.
  • the hole is adapted to receive a separate closure (not shown) which may be moved relative to the can end 1 between a closed position, in which the hole 7 is closed and sealed, and an open position, in which the hole or a major portion thereof is exposed allowing the contents of the can to be dispensed.
  • the can end 1 is fixed to a can body (not shown) using conventional joining techniques, such as double seaming etc.
  • W of the can end 1 according to the invention is less than 4mm, preferably less than 3mm.
  • W is approx. 4mm.
  • X is preferably less than 3mm.
  • a method and apparatus for producing such an end panel is also described by way of example. This has fewer steps than described and shown in any of Figs. 33, 34, 35 and 36 in EP 1607341 A (TOYO SEIKAN) 21.12.2005 .
  • Figures 2 through 8 show a stepwise progression of the formation of the end shell 1 ' culminating in a finished can end 1 and the tooling required to complete each step in the fabrication.
  • the first step of the method is to pierce a hole 7 through the end shell blank V as shown in figs 3. 3A and 3B.
  • This step may be carried out using a conventional punch and die arrangement, and the end panel may be clamped against the face of the die during piercing.
  • the metal disc created in the piercing step may be discarded or may be saved for another purpose.
  • the second step of the method is to depress an annular region 8' around the periphery of the hole 7 as shown in figs 4A. 4B. 5. 5A and 5B In the tooling of figure 4A. the hole 7 is positioned on a location tool 35 before being clamped between the opposing faces of the clamp 40 and die 30. The annular region 8' is then depressed into the annular profile of the die 30 by the movement of the annular punch 45.
  • the periphery of the hole 7 is formed into a lip 9 by drawing it between the inner diameter of the annular punch 40 and the inner wall of the annular profile of the die 30.
  • the lip 9 assists smooth forming of the curl in the final step.
  • the radius between the outer diameter and the end face of the annular punch 45, the radius between the outer wall of the annular profile and the adjacent face of the die 30, and the depth of the annular region 8' approximate to the desired final dimensions of the curl. This avoids excessive working or re-working of the metal, and helps to preserve the surfaces to provide sealing in subsequent use.
  • Formation of the annular region 8' helps to remove any slackness of the metal in the end panel, and helps to stiffen the periphery of the hole 7.
  • the third step of the method is to draw the inner portion of the annular region 8' upwards using the tooling of figures 6A and 6B to form the "start of a curl" 8" shown in figures 7 to 7B.
  • the end panel is firstly clamped between the faces of the die 60 and clamp 70, and the outer portion of the annular region 8' is supported by the profile of the die 60.
  • the inner portion of the annular region 8' is then formed into the "start of a curl" 8" by movement of the punch 50.
  • the profile of the die 60 approximates to the desired final internal dimensions of the curl. This avoids excessive working or re-working of the metal, and helps to preserve the surfaces to provide sealing in subsequent use. [0028] Whilst it is preferred to carry out this third step of forming the "start of a curl" 8" between forming the annular depression 8' and the final step of creating the final curl, it is possible to omit this third step. Omission of this third step is possible if the inside diameter of the lip 9 approximates to the final inside diameter of the curl, and the height of the lip 9 is tall enough to form into the final curl. The height of the lip 9 may be made tall by providing the die 30 with an inner face positioned above the outer face.
  • the final step of the method is to form the final shape of the curl using tooling arranged to accurately control the dimensions and condition of those surfaces against which the closure is to subsequently fit and seal.
  • the tooling of figure 9 shows a punch 80 and a die 90 in a closed position.
  • the curl 8 has been formed to a final shape and dimensions by the profiles of the punch 80 and die 90.
  • FIG. 10 The tooling of figure 10 shows an alternative punch 80' and an alternative die 90', in a closed position.
  • the curl 8 has been formed to a final shape and dimensions by the alternative profiles of the punch 80' and die 90'
  • Either the tooling of figure 9 or the tooling of figure 10 may be preferred depending upon which surfaces of the curl 8 are to be used to fit and seal against the closure (not shown), and so are important to be supported by the tooling profiles.
  • FIG. 11A shows the end panel clamped between a die 90" and an annular clamping ring 85
  • figure 11 B shows the same tooling after a punch 80" has been moved to form the final curl 8. Clamping the end panel in this way prevents the metal of the curl being pushed outwards from the profile of the die during forming, and so produces a better curl and prevents slackness being created in the metal of the panel surrounding the aperture.
  • the punch 80" of figures 11A and 11 B has a downward projection at the periphery of its profile, which directs the cut-edge of the curl downwards to reduce exposure of the cut-edge.
  • the method described above avoids excessive working of surfaces that are required for sealing, and the progressive formation of annular features prevents the formation of radial wrinkles and the risk of radial splits in the metal.
  • the method is described in detail for producing accurate, round apertures for sealing with separate round closures, it will be apparent to the person skilled in the art how this method may be adapted to produce accurate, non-round apertures if desired.
  • the invention has been described as it relates to the formation of a curled aperture in a sheet metal end panel, which is adapted to be joined to a container body.
  • the metal of the end panel may be coated with polymer or other material and an advantage of the method of the invention is the preservation of such coatings.
  • the aperture of the invention may be formed in the opposite end panel of a sheet metal container body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Closures For Containers (AREA)

Abstract

Un couvercle de tôle (1) est destiné à être fixé au corps d'un réceptacle. Le couvercle (1) comprend un panneau central (2) entouré par une partie d'assemblage (4), pouvant se rattacher à la périphérie du corps de réceptacle, une fois que celui-ci a été rempli d'un produit. Le panneau central (2) définit une ouverture (7) par laquelle le produit peut être distribué depuis le réceptacle. L'ouverture (7) est conçue pour contenir une fermeture distincte, et le bord tranché de l'ouverture (7) est recourbé afin de protéger l'utilisateur contre les coupures et d'offrir un rebord d'ouverture, s'accouplant avec la fermeture distincte afin d'assurer un joint étanche aux liquides. La fermeture se déplace par rapport au panneau central entre une position fermée, dans laquelle l'ouverture et la fermeture forment ensemble un joint étanche aux liquides, et une position ouverte dans laquelle le joint est rompu et la fermeture se déplace par rapport au panneau central afin d'ouvrir au moins une partie de l'ouverture.
PCT/EP2010/052159 2007-11-09 2010-02-19 Panneau d'extrémité métallique muni d'un orifice Ceased WO2010094780A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10705154A EP2398713A1 (fr) 2009-02-20 2010-02-19 Panneau d'extrémité métallique muni d'un orifice
US13/202,224 US20120118889A1 (en) 2009-02-20 2010-02-19 Metal end panel with hole
US13/835,562 US20130206766A1 (en) 2007-11-09 2013-03-15 Resealable beverage can end and methods relating to same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09153374 2009-02-20
EP09153374.5 2009-02-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/267,159 Continuation US8336726B2 (en) 2007-11-09 2008-11-07 Resealable beverage can end and methods relating to same

Publications (1)

Publication Number Publication Date
WO2010094780A1 true WO2010094780A1 (fr) 2010-08-26

Family

ID=40666828

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/052159 Ceased WO2010094780A1 (fr) 2007-11-09 2010-02-19 Panneau d'extrémité métallique muni d'un orifice

Country Status (3)

Country Link
US (1) US20120118889A1 (fr)
EP (1) EP2398713A1 (fr)
WO (1) WO2010094780A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12076958B2 (en) 2018-12-19 2024-09-03 Societe Des Produits Nestle S.A. Manufacturing process for producing hermetic single-use food containers such as coffee pods, including a creasing step
CA3160105A1 (fr) * 2019-11-08 2021-05-14 Ball Corporation Couvercle de canette refermable dote d'une languette non detachable

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380622A (en) * 1966-12-15 1968-04-30 Procter & Gamble Method and material for hermetically sealing containers
US4071182A (en) * 1976-09-07 1978-01-31 Christiana Metals Corporation Method of making container with easy open top
GB2022474A (en) * 1978-06-06 1979-12-19 Alusuisse Manufacture of colosure rings for can ends
EP0408268A2 (fr) * 1989-07-10 1991-01-16 CarnaudMetalbox plc Procédé et appareil pour la fabrication d'un anneau d'une fermeture pour un récipient
US5287718A (en) * 1991-01-16 1994-02-22 Toyo Saikan Kaisha, Ltd. Curl forming method for a can end
DE19625174A1 (de) * 1996-06-24 1998-01-08 Schmalbach Lubeca Deckelringfertigung ohne Verschnitt
EP1607341A1 (fr) 2003-01-24 2005-12-21 Toyo Seikan Kaisya, Ltd. Couvercle de recipient facile a ouvrir refermable et son procede de production
EP1640282A1 (fr) * 2004-09-28 2006-03-29 Ball Packaging Europe GmbH Couvercle en tôle avec une grande ouverture pour une canette
WO2007128810A1 (fr) 2006-05-10 2007-11-15 Crown Packaging Technology, Inc Dispositif d'ouverture de canette

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6571972B1 (en) * 1998-10-05 2003-06-03 Hoover Materials Handling Group, Inc. Bulk drum lid with two bung openings
GB0103404D0 (en) * 2001-02-12 2001-03-28 Steadman William D Can opening arrangement
JP3962377B2 (ja) * 2003-03-24 2007-08-22 Ｎｅｗｓ株式会社 電子レンジ調理用システム容器
US7387220B2 (en) * 2004-08-30 2008-06-17 Scholle Corporation Cap assembly and container used therewith
US7607551B2 (en) * 2006-12-01 2009-10-27 Letica Corporation Tint plug for paint container

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380622A (en) * 1966-12-15 1968-04-30 Procter & Gamble Method and material for hermetically sealing containers
US4071182A (en) * 1976-09-07 1978-01-31 Christiana Metals Corporation Method of making container with easy open top
GB2022474A (en) * 1978-06-06 1979-12-19 Alusuisse Manufacture of colosure rings for can ends
EP0408268A2 (fr) * 1989-07-10 1991-01-16 CarnaudMetalbox plc Procédé et appareil pour la fabrication d'un anneau d'une fermeture pour un récipient
US5287718A (en) * 1991-01-16 1994-02-22 Toyo Saikan Kaisha, Ltd. Curl forming method for a can end
DE19625174A1 (de) * 1996-06-24 1998-01-08 Schmalbach Lubeca Deckelringfertigung ohne Verschnitt
EP1607341A1 (fr) 2003-01-24 2005-12-21 Toyo Seikan Kaisya, Ltd. Couvercle de recipient facile a ouvrir refermable et son procede de production
EP1640282A1 (fr) * 2004-09-28 2006-03-29 Ball Packaging Europe GmbH Couvercle en tôle avec une grande ouverture pour une canette
EP1640282B1 (fr) 2004-09-28 2006-12-27 Ball Packaging Europe GmbH Couvercle en tôle avec une grande ouverture pour une canette
WO2007128810A1 (fr) 2006-05-10 2007-11-15 Crown Packaging Technology, Inc Dispositif d'ouverture de canette

Also Published As

Publication number Publication date
US20120118889A1 (en) 2012-05-17
EP2398713A1 (fr) 2011-12-28

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