FI20050634A - Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi - Google Patents

Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi Download PDF

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Publication number
FI20050634A
FI20050634A FI20050634A FI20050634A FI20050634A FI 20050634 A FI20050634 A FI 20050634A FI 20050634 A FI20050634 A FI 20050634A FI 20050634 A FI20050634 A FI 20050634A FI 20050634 A FI20050634 A FI 20050634A
Authority
FI
Finland
Prior art keywords
internal cooling
extruded thermoplastic
thermoplastic tubes
tubes
extruded
Prior art date
Application number
FI20050634A
Other languages
English (en)
Swedish (sv)
Other versions
FI20050634A0 (fi
Inventor
Gunnar Blomqvist
Jonas Holmlund
Stefan Slotte
Original Assignee
Kwh Pipe Ab Oy
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 Kwh Pipe Ab Oy filed Critical Kwh Pipe Ab Oy
Priority to FI20050634A priority Critical patent/FI20050634A/fi
Publication of FI20050634A0 publication Critical patent/FI20050634A0/fi
Priority to CA002612163A priority patent/CA2612163A1/en
Priority to US11/917,694 priority patent/US8062013B2/en
Priority to RU2007149041/05A priority patent/RU2410240C2/ru
Priority to PCT/FI2006/050253 priority patent/WO2006134228A1/en
Priority to ZA200711067A priority patent/ZA200711067B/xx
Priority to EP06755415A priority patent/EP1890859A4/en
Publication of FI20050634A publication Critical patent/FI20050634A/fi
Priority to NO20080227A priority patent/NO20080227L/no

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/905—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using wet calibration, i.e. in a quenching tank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
FI20050634A 2005-06-15 2005-06-15 Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi FI20050634A (fi)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI20050634A FI20050634A (fi) 2005-06-15 2005-06-15 Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi
CA002612163A CA2612163A1 (en) 2005-06-15 2006-06-13 Method and device for internal cooling of extruded thermoplastics pipes
US11/917,694 US8062013B2 (en) 2005-06-15 2006-06-13 Device for internal cooling of extruded thermoplastics pipes
RU2007149041/05A RU2410240C2 (ru) 2005-06-15 2006-06-13 Устройство для внутреннего охлаждения экструдированных термопластических труб
PCT/FI2006/050253 WO2006134228A1 (en) 2005-06-15 2006-06-13 Method and device for internal cooling of extruded thermoplastics pipes
ZA200711067A ZA200711067B (en) 2005-06-15 2006-06-13 Method and device for internal cooling of extruded thermoplastics pipes
EP06755415A EP1890859A4 (en) 2005-06-15 2006-06-13 METHOD AND DEVICE FOR THE INTERNAL COOLING OF EXTRUDED THERMOPLASTIC PIPES
NO20080227A NO20080227L (no) 2005-06-15 2008-01-14 Fremgangsmate og anordning for innvendig avkjoling av ekstruderte termoplastror

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20050634A FI20050634A (fi) 2005-06-15 2005-06-15 Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi

Publications (2)

Publication Number Publication Date
FI20050634A0 FI20050634A0 (fi) 2005-06-15
FI20050634A true FI20050634A (fi) 2006-12-16

Family

ID=34778354

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20050634A FI20050634A (fi) 2005-06-15 2005-06-15 Menetelmä ja laite ekstrudoitujen kestomuoviputkien sisäiseksi jäähdyttämiseksi

Country Status (8)

Country Link
US (1) US8062013B2 (fi)
EP (1) EP1890859A4 (fi)
CA (1) CA2612163A1 (fi)
FI (1) FI20050634A (fi)
NO (1) NO20080227L (fi)
RU (1) RU2410240C2 (fi)
WO (1) WO2006134228A1 (fi)
ZA (1) ZA200711067B (fi)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008047209A1 (de) * 2008-09-15 2010-04-15 Cincinnati Extrusion Gmbh Vorrichtung und Verfahren zum Kühlen von Kunststoffprofilen
DE102010025524A1 (de) * 2010-06-29 2011-12-29 Kraussmaffei Technologies Gmbh Vorrichtung zum Erzeugen eines hohlen Kunststoffprofiles
GB201318252D0 (en) * 2013-10-15 2013-11-27 Ap Plastics Ltd Blown film extrusion system and process
CN104002465B (zh) * 2014-05-15 2016-06-29 华南理工大学 一种胀-微缩式双轴向拉伸管连续成型方法及设备
CN110091493B (zh) * 2019-04-28 2024-02-02 重庆爱博塑业有限公司 一种ps片材定型装置
RU2769197C2 (ru) * 2020-05-27 2022-03-29 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Устройство завихрителя потоков воздуха для охлаждения экструдированных масс
CN113635531B (zh) * 2021-08-03 2023-03-17 青岛英诺包装科技有限公司 一种bopp包装膜的制备及其生产工艺
CN113977902B (zh) * 2021-10-12 2024-02-02 安徽瑞远管道有限公司 一种快速冷却定型的pe给水管注塑设备
CN115648502B (zh) * 2022-11-16 2023-06-30 湖南诚路管业科技有限公司 一种节能型hdpe给水管快速冷却设备

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB828851A (en) * 1957-01-01 1960-02-24 British Cellophane Ltd Improvements in or relating to the manufacture of thin-walled tubing from thermoplastic materials
GB1104079A (en) * 1964-03-26 1968-02-21 Plastics Kogyo Co Ltd Apparatus for producing synthetic resin tubes
US3329999A (en) * 1965-08-16 1967-07-11 Nat Distillers Chem Corp Internal air ring
DE1504804A1 (de) * 1965-08-28 1969-09-18 Reifenhaeuser Kg Verfahren zum Kuehlen des aufgeweiteten Folienschlauches bei Folienblasanlagen
NO119195B (fi) * 1965-10-27 1970-04-06 J Thordarson
CH549455A (fr) * 1971-09-28 1974-05-31 Sig Schweiz Industrieges Procede de fabrication d'un film tubulaire en matiere plastique, installation pour la mise en oeuvre de ce procede et film obtenu par ce procede.
DE2357993C2 (de) * 1973-11-21 1983-11-17 Reifenhäuser KG, 5210 Troisdorf Vorrichtung zur Innenkalibrierung von Hohlprofilen aus thermoplastischem Kunststoff
DE2523975A1 (de) * 1975-05-30 1976-12-16 Veba Chemie Ag Vorrichtung zur herstellung spannungsarmer rohre aus thermoplastischem kunststoff
DE2652641C2 (de) * 1976-11-19 1978-12-14 Reifenhaeuser Kg, 5210 Troisdorf Einrichtung zur Innenkühlung von Kunststoffhohlprofilen
US4698196A (en) * 1985-12-24 1987-10-06 Xerox Corporation Method and apparatus for extruding creaseless thin walled tubes
US5403120A (en) * 1986-03-31 1995-04-04 Nupipe, Inc. Method of installing a substantially rigid thermoplastic pipe in existing main and lateral conduits
AT409474B (de) * 1992-09-01 2002-08-26 Greiner & Soehne C A Extrusionswerkzeug für mit zumindest einem hohlraum versehene bauteile sowie verfahren zum herstellen derartiger bauteile
US5525289A (en) * 1995-01-30 1996-06-11 Lupke; Manfred A. A. Method and apparatus for cooling hollow molded product
EP0857561B1 (de) * 1997-02-05 2003-09-10 Linde AG Verfahren und Vorrichtung zur Kühlung extrudierter Hohlprofile
HUP0301174A2 (hu) * 2003-04-30 2005-03-29 Dr-Pack Ii. Kft. Eljárás és berendezés extrudált műanyag fóliatömlők hűtésére

Also Published As

Publication number Publication date
WO2006134228A1 (en) 2006-12-21
ZA200711067B (en) 2009-06-24
EP1890859A1 (en) 2008-02-27
FI20050634A0 (fi) 2005-06-15
RU2007149041A (ru) 2009-07-10
EP1890859A4 (en) 2011-08-24
CA2612163A1 (en) 2006-12-21
RU2410240C2 (ru) 2011-01-27
NO20080227L (no) 2008-03-17
US8062013B2 (en) 2011-11-22
US20090139695A1 (en) 2009-06-04

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