EP0953457B1 - Vorrichtung und Verfahren zum Übertragen von grafischen Darstellungen auf Gegenstände durch Sublimation - Google Patents

Vorrichtung und Verfahren zum Übertragen von grafischen Darstellungen auf Gegenstände durch Sublimation Download PDF

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Publication number
EP0953457B1
EP0953457B1 EP99108406A EP99108406A EP0953457B1 EP 0953457 B1 EP0953457 B1 EP 0953457B1 EP 99108406 A EP99108406 A EP 99108406A EP 99108406 A EP99108406 A EP 99108406A EP 0953457 B1 EP0953457 B1 EP 0953457B1
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EP
European Patent Office
Prior art keywords
foil
sublimation
vacuum
sealing
transferring
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.)
Expired - Lifetime
Application number
EP99108406A
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English (en)
French (fr)
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EP0953457A2 (de
EP0953457A3 (de
Inventor
Giovanni Bortolato
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Lasa Impianti Srl
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Individual
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Publication of EP0953457A3 publication Critical patent/EP0953457A3/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
    • B44C1/1716—Decalcomanias provided with a particular decorative layer, e.g. specially adapted to allow the formation of a metallic or dyestuff layer on a substrate unsuitable for direct deposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
    • B41M5/0358—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic characterised by the mechanisms or artifacts to obtain the transfer, e.g. the heating means, the pressure means or the transport means

Definitions

  • the present invention relates to an apparatus and a method for transferring graphic representations on an object by sublimation.
  • vacuum is generated by one or more adapted sheaths of elastic material and templates or shapes are used to optimize the adhesion to the object.
  • templates or shapes entails their making and installation as well as the provision of a heat barrier which causes a less perfect sublimation of the inks or an excessive time for heating the foil and the object with the consequent waste of energy and slowing down of the operation.
  • the decorated object must also be properly packaged in order to protect its graphic representation during handling and storage.
  • DE-A-39 35 605 discloses an apparatus for transferring a colour pattern onto the surface of metallic hollow bodies.
  • the pattern is carried by single sheets, which are picked up from a stack to be wrapped around the body to be decorated.
  • the film-wrapped body is then heated in order to transfer the decoration by sublimation of the colour molecules.
  • WO 98/08694 discloses a method for decorating objects by thermal transfer of a pattern from a film, which is applied to the objects just on some portions of their surfaces. Adhesion of the film to said surfaces is obtained through the action of heated, rotating nip rolls suitably shaped to match with the shape of the corresponding surface portions.
  • WO 96/00658 discloses a device for decorating the surface of an object by sublimation, wherein the object with two decoration sheets is manually inserted into a bag made of a frame and two elastic membranes manually fastened to said frame to allow vacuum be generated inside the bag, so as to enable the elastic membranes to press the decorated sheets against the surface of the object.
  • An aim of the present invention is to eliminate the above cited drawbacks of the prior art.
  • An object of the invention is to provide an apparatus and a method, for transferring graphic representations on an object by sublimation, that allow to reduce the heating time of the inked foil and the wrapped object and to improve or optimize the transfer by sublimation of the inks from the foil to the object, thereby increasing the production rate and reducing the costs.
  • a further object of the invention is to provide an apparatus and a method, for transferring graphic representations on an object by sublimation, that completely eliminate the use of labor for wrapping the article with the foil.
  • Still a further object of the invention is to provide an apparatus and a method, for transferring graphic representations on an object by sublimation, that eliminate the use of shapes and templates for decorating the article.
  • the present invention also relates to a method for transferring graphic representations on an object by sublimation, as claimed by claim 12.
  • the apparatus for transferring graphic representations on an object by sublimation comprises vacuum means for generating a vacuum for allowing a graphic representation, provided on a foil shaped support 3, to adhere to an object, for example a section bar 2.
  • the apparatus also comprises a transfer means 4 for transferring the graphic representation provided on the foil to the object 2 by sublimation.
  • the apparatus comprises a packing means for automatically wrap an object, for example the section bar 2 with the foil 3.
  • the packing means comprises seal means 6 of the front portion 7 and lower portion 8 of the foil, with respect of section bar 2.
  • the packing means also comprises a tensioning means for the foil 3, as explained in greater detail later.
  • the packing means comprises at least one frictioned roll 9 adapted to allow the foil 3 to unroll continuously above a foil guide 10, substantially shaped as a tubular cylinder, with the aid of a deflector cylinder 11.
  • the section bar 2, or the object, to be decorated is passed inside the foil guide 10 so that the foil 3 is arranged across the foil guide 10 with its front and lower portions presented to the seal means 6. In this manner the portions are sealed together, preferably by thermal welding, thus providing a tubular bag wherein the section bar 2 is arranged.
  • the seal means comprises a pair of heated rolls 12 having a rotation speed substantially equal to the feed rate of the section bar 2 inside the foil guide 10.
  • the seal means 6 comprises at least one vibrating head and a counter-head 13 adapted to seal the foil edges by means of ultrasound.
  • the vibrating speed of the vibrating head 13 is suited to the feed rate of the section bar 2 inside the foil guide 10 so that the sealing operation is continuous.
  • the tensioning means of foil 3 comprises a first tensioning gripper 15 adapted to grip the two front edges of foil 3 in order to tension foil 3 longitudinally and transversely along the entire extension of the object, in this case along the extension of the section bar 2.
  • the first gripper 15 prevents the foil 3 from folding or creasing along the section bar 2 thus improving the formation of vacuum between the foil 3 and the surfaces of the section bar 2, thereby optimizing the foil/object coupling and allowing all the decoration surfaces to be in contact with all the object surfaces.
  • the tensioning means also comprises at least a second gripper 16 for retaining the foil 3 in the back of the object and particularly, in the illustrated cases, in the back of the section bar as illustrated in FIG. 4.
  • the vacuum means comprises a vacuum pump 17 connected to the foil 3 and particularly to the tubular bag defined around the section bar 2, by means of a channel 18 having an opening in the bag formed by foil 3.
  • Channel 18 may be arranged inside or outside the cylindrical foil guide 10 and may be fixed or extensible as preferred.
  • the second gripper 16 tends to close the back edges 20 of the foil 3 together, at the opening 19 of channel 18, in order to generate a seal between the edges 20 and the channel 18 thus generating a vacuum inside the bag formed by the foil. This allows the foil 3 to perfectly adhere to the entire surface of section bar 2 to be inked, regardless of the shape of the section bar and without using shapes or templates.
  • the section bar 2 and the foil 3 are heated by a transfer means 4 adapted to transfer the graphic representation provided on the foil 3 to the section bar 2 by sublimation.
  • the transfer means 4 comprises at least one solenoid 23 which effects the heating of foil 3 and of section bar 2 optimizing the transfer of ink on the section bar by virtue of the heating by induction that heats the metallic support and therefore promotes the transfer of ink by sublimation to the support without any inconvenience in contrast to the heating by hot air.
  • solenoid 23 may run along the section bar 2 or may be fixed.
  • the section bar is heated by passing a current through it, of a preset magnitude and for a certain time, making the section bar behave as a resistance.
  • the heating temperature of the section bar when the current flows through it, may be conveniently measured by computing its resistivity by means of a PLC in order to monitor the temperature of the metal directly rather than indirectly as in the conventional measurement systems.
  • the present system for heating the section bar entails a reduced energy consumption, as well as rapid detecting and heating times, with respect of conventional methods.
  • Foil 3 is made of a thermoresistant plastics which may be thermo-retracting or thermo-expanding.
  • foil 3 has at least a first polyester layer 30, a second layer 31 having an aluminum metalization, and a third layer 32 having the sublimation ink to contact the surfaces of the object to be decorated.
  • foil 3 has at least one layer of porous material adapted to absorb the moisture and thus to prevent the formation of gas and/or to ease its removal by means of the vacuum pump.
  • foil 3 has at least an intermediate layer after the first impermeable layer 30, made for example of polyester, polyurethane, silicone rubber, etc., and the second layer 31 having an aluminum metalization or similar.
  • the intermediate layer may be of MAT fiber, cotton, etc., and is comprised between the second layer 31 and the third layer 32 having the sublimation ink.
  • foil 3 has the intermediate layer made of permeable material instead of the second layer 31 (metalization), i.e. directly between the first impermeable layer 30 and the third layer 32 having the sublimation ink.
  • foil 3 allows the thermal welding of its edges and a perfect adherence to the metallic section bar 2 without the use of shapes, templates or elastic sheaths.
  • the foil 3 thus provided also allows to use the induction heating, thus saving energy and speeding up the production process.
  • the foil 3 thus conceived also provides a protection around the object during its handling and storage thus preventing a supplemental operation of packaging of the object once treated.
  • the method according to the invention is also advantageous in allowing to automatically put the object or section bar 2 into a bag made of the inked foil and to generate a vacuum between the section bar 2 and the foil before transferring the graphic representation on the section bar by sublimation.
  • a vacuum is constantly kept between the foil and the section bar in order to prevent the formation of air pockets that by heating would increase their volume thus generating a non precise transfer of the ink from the foil 3 to the section bar 2.
  • the object is painted with liquid paints or curing powders or paint adapted to the sublimation process or transfer print.
  • section bar 2 is passed inside the tubular foil guide 10 and at the same time the foil 3 is unwound from the roll 9 above the foil guide 10 so that its lower edges 8 may be welded in order to provide a bag shaped as a tubular film wrapped around the section bar.
  • the bag formed by the foil 3 is pulled by a first gripper 15 in order to prevent the formation of folds or creases along its transversal and longitudinal extension.
  • the second gripper 16 closes the back edges 20 of the bag, defined by the foil 3, above channel 18 through which vacuum will be generated inside the bag.
  • foil 3 is laid on a plane having a sucking means adapted to keep the foil into position.
  • foil 3 has a first portion lying on the plane while a second portion protrudes outside the plane and rests on a bar of suitable length and parallel to the plane.
  • the bar too has sucking means adapted to keep the second edge of the second portion of foil lying outside said plane.
  • Section bar 2 is laid on the first portion of the foil which is laid down on said plane and by means of two arms - not illustrated in the drawings - pivoted on the plane, said bar is rotated through 180°, about the pivot axis of the arms, in order to cover the section bar 2 with the second portion of the foil external to said plane. In this manner, the second edge of the second portion of foil, born by the bar, protrudes from the first edge of the first portion laid on the plane.
  • the sucking on the bar is stopped and sucking is activated below the second edge of the foil protruding from the first edge.
  • the first edge is sealingly secured to the second edge of the foil by means, for example, of a carriage - not illustrated in the drawings - running along the plane.
  • Such connection between the two edges of the foil may be performed, as preferred, by a double adhesive, ultrasound, thermal welding, etc.
  • the thickness of the bag may be varied or an antifriction material may be used on the section bar or inside the bag.
  • the apparatus according to the invention may be provided, as preferred, in one piece or subdivided in several working stations.
  • the packing means may be used separately from the vacuum and heating means which may be constituted by conventional machinery.
  • the materials employed, as well as the dimensions, may be any according to the specific needs and the state of the art.

Landscapes

  • Labeling Devices (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Devices For Executing Special Programs (AREA)
  • Electron Beam Exposure (AREA)
  • Inorganic Insulating Materials (AREA)
  • Detergent Compositions (AREA)

Claims (15)

  1. Vorrichtung zum Übertragen von graphischen Darstellungen von einer folienförmigen Unterlage (3) auf Gegenstände (2) durch Sublimation, umfassend Übertragungsmittel (4), um die graphischen Darstellungen durch Sublimation von der Folie (3) auf den Gegenstand (2) zu übertragen, und Einsackmittel, um den Gegenstand (2) mit der Folie (3) zu umhüllen, dadurch gekennzeichnet dass sie Vakuumerzeugungsmittel (17) umfasst, um am Gegenstand (2) die an der folienförmigen Unterlage (3) vorhandene graphische Darstellung zum Anhaften zu bringen und dadurch, dass die Einsackmittel der Folie erlauben, durchgehend abgezogen zu werden, um den Gegenstand (2) mit der Folie (3) zur Bildung eines im wesentlichen schlauchförmigen, den Gegenstand (2) beinhaltenden Sack automatisch zu umhüllen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Einsackmittel Versiegelungsmittel (6) zum Versiegeln mindestens der unteren Abschnitte (8) der Folie (3) gegenüber dem Gegenstand (2) zu versiegeln.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Einsackmittel Spannmittel (15, 16) zum Spannen der Folie (3) umfassen.
  4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Einsackmittel mindestens eine die Folie (3) tragende Rolle (9) umfassen, wobei die Folie kontinuierlich von der Rolle (9) oberhalb eines im wesentlichen zylindrischen Folienführers (10) abgezogen wird, in dem der Gegenstand (2) hindurchgeführt wird, wobei die Folie (3) derartige Abmessungen aufweist, dass ihre Lappen mit den Versiegelungsmitteln (6) in Eingriff kommen.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Versiegelungsmittel (6) fähig sind, mindestens die unteren Lappen (8) der Folie (3) derart dicht heiß zu verschweißen, dass ein Sack hergestellt wird, in dem der Gegenstand(2) aufgenommen ist.
  6. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Versiegelungsmittel mindestens einen Vibrierkopf (13) zum Ultraschallversiegeln der Folie (3) umfassen.
  7. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Spannmittel mindestens einen ersten Spanngreifer (15) erfassen, der die Vorderlappen (7) der Folie (3) ergreift, um die Folie längs und quer zum Gegenstand (2) in Spannung zu versetzen.
  8. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Spannmittel mindestens einen zweiten Greifer (16) zur Behandlung der Folie (3) auf der Hinterseite des Gegenstandes (2) umfassen.
  9. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Vakuumerzeugungsmittel mindestens eine Vakuumpumpe (17) umfassen, die mit der als Schlauchsack um den Gegenstand (29) herum angeordneten Folie (3) mittels eines Kanals (18) mit einer Öffnung (19) innerhalb des Sackes verbunden ist.
  10. Vorrichtung nach Anspruch 8 und 9, dadurch gekennzeichnet, dass der zweite Greifer (16) den Sack hinten in der Nähe der Öffnung (19) des Kanals (18) schließt.
  11. Vorrichtung nach Anspruch 4 und 9, dadurch gekennzeichnet, dass der Kanal (18) innerhalb des zylindrischen Folienführers (10) angeordnet ist.
  12. Verfahren zum Übertragen von graphischen Darstellungen von einer folienförmigen Unterlage (3) auf Gegenstände (2) durch Sublimation, dadurch gekennzeichnet, dass es nach einer Vorbehandlung und der Lackierung des Gegenstandes (2) die automatische Umhüllung des Gegenstandes (2) mit einer durchgehend abgezogenen Folie (3) umfasst, die in einem wesentlichen luftdichten Material ausgeführt ist und auf ihrer in Richtung des Gegenstandes gerichteten Oberfläche die auf den Gegenstand zu übertragende graphische Darstellung aufweist, das Versiegeln der Folie (3) zur Schaffung eines im wesentlichen geschlossenen, den Gegenstand (2) aufnehmenden, schlauchförmigen Sackes und die Vakuumerzeugung zwischen der Folie (3) und dem Gegenstand (2) vor der Übertragung durch Sublimation der graphischen Darstellung von der Folie (3) auf den Gegenstand (2).
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass die Übertragung durch Sublimation der graphischen Darstellung auf den Gegenstand (2) durch Induktion erfolgt und dass während dieser Übertragung das Vakuum zwischen der im wesentlichen geschlossenen Folie (3) und dem Gegenstand (2) beibehalten wird.
  14. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Gegenstand (2) zuerst auf einem ersten, auf einer Ebene angeordneten Abschnitt der Folie (3) zum Aufliegen gebracht wird, dann mit dem bleibenden, zweiten Abschnitt der Folie (3) derart überzogen wird, dass ein erster Lappen des ersten Abschnitts der Folie mit einem zweiten Lappen des zweiten Folienabschnittes versiegelt werden kann, wobei dann der Kopf und das Ende der Folie (3) versiegelt werden, um das Vakuum zwischen der Folie (3) und dem Gegenstand (2) zu erzeugen.
  15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass der Gegenstand (2) überzogen wird, indem ein Haltebalken des zweiten Lappens um 180° verschwenkt wird, wobei der Haltebalken mit Ansaugmitteln zum Zurückhalten des zweiten Lappens versehen ist.
EP99108406A 1998-04-30 1999-04-29 Vorrichtung und Verfahren zum Übertragen von grafischen Darstellungen auf Gegenstände durch Sublimation Expired - Lifetime EP0953457B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998MI000935A IT1305612B1 (it) 1998-04-30 1998-04-30 Macchina e procedimento per trasferire mediante sublimazionerappresentazioni grafiche su di un oggetto
ITMI980935 1998-04-30

Publications (3)

Publication Number Publication Date
EP0953457A2 EP0953457A2 (de) 1999-11-03
EP0953457A3 EP0953457A3 (de) 2001-11-07
EP0953457B1 true EP0953457B1 (de) 2004-02-18

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EP99108406A Expired - Lifetime EP0953457B1 (de) 1998-04-30 1999-04-29 Vorrichtung und Verfahren zum Übertragen von grafischen Darstellungen auf Gegenstände durch Sublimation

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Country Link
EP (1) EP0953457B1 (de)
AT (1) ATE259720T1 (de)
DE (1) DE69914822D1 (de)
ES (1) ES2213941T3 (de)
IT (1) IT1305612B1 (de)

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ITMI20002580A1 (it) * 2000-11-30 2002-05-30 Urbani Ines Dispositivo per la formazione di un sacchetto con film di materiale elettricamente isolante racchiudente al suo interno un oggetto e della s
ITMI20011198A1 (it) * 2001-06-07 2002-12-07 Menphis S R L Processo di stampa transfer
CN1491811A (zh) * 2002-10-21 2004-04-28 精细及绘图物品制造公司 对平面或复合面加标记的装饰方法
CN1323836C (zh) * 2004-03-08 2007-07-04 马峰然 真空自动包裹铝型材转印机
ITMI20041891A1 (it) 2004-10-06 2005-01-06 Lasa Impianti Srl Procedimento e apparecchiatura per la decorazione in continuo mediante sublimazione di profilati.
ITMI20042254A1 (it) * 2004-11-22 2005-02-22 Lasa Impianti Srl Procedimento e apparecchiatura per la decorazione in continuo mediante sublimazione di pannelli in truciolato di legno
EP1752305A1 (de) * 2005-08-10 2007-02-14 Menphis S.p.A. Dekorationsverfahren durch Sublimation
ITMI20060563A1 (it) 2006-03-27 2007-09-28 Paolo Checcucci Forno per la decorazione a messo sublimazione d'inchiostri di profilati per infissi con la loro introduzione in detto forno a mezzo di una giostra rotativa
US20070261782A1 (en) * 2006-05-09 2007-11-15 Frye Robert D Method for sublimating a decoration on the surface of an object
CN102152700B (zh) * 2010-02-11 2013-03-20 隽益实业股份有限公司 一种热塑转印袋的制造方法
GB201013877D0 (en) * 2010-08-19 2010-09-29 Redbox Technology Ltd 3d printing process
FR3008345B1 (fr) * 2013-07-15 2016-01-01 N C G Services Procede de decoration par sublimation
US10632715B2 (en) 2017-06-12 2020-04-28 Can't Live Without It, LLC Perimetric decoration by sublimation
CN108944228A (zh) * 2018-07-02 2018-12-07 浙江嘉益保温科技股份有限公司 一种模杯印花工艺
IT202000015289A1 (it) * 2020-06-25 2021-12-25 Atiu S R L Procedimento ed apparecchiatura di decorazione di oggetti mediante inchiostri sublimatici.

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DE3935605A1 (de) * 1989-10-26 1991-05-02 Decorex Lizenz Ag Vorrichtung zur umwicklung der oberflaeche eines metallischen hohlkoerpers
US5590509A (en) * 1994-03-23 1997-01-07 W. R. Grace & Co-Conn. Process and machine for conditioning any products in containers such as barquettes
FR2721860B1 (fr) * 1994-06-30 1996-08-23 Claveau Jean Noel Dispositif permettant de sublimer un decor sur la surface d'un objet de forme quelconque
GB9500652D0 (en) * 1995-01-13 1995-03-08 Burton S Gold Medal Biscuits Packaging machine
IT1283836B1 (it) * 1996-08-28 1998-04-30 Viv Int Spa Procedimento per decorare profilati metallici,in materiale plastico e simili e relativa apparecchiatura
IT1292470B1 (it) * 1997-07-04 1999-02-08 Ilario Carizzoni Procedimento e apparato per stampare e decorare tramite inchiostri sublimabili

Also Published As

Publication number Publication date
ATE259720T1 (de) 2004-03-15
EP0953457A2 (de) 1999-11-03
IT1305612B1 (it) 2001-05-09
EP0953457A3 (de) 2001-11-07
ES2213941T3 (es) 2004-09-01
DE69914822D1 (de) 2004-03-25
ITMI980935A1 (it) 1999-10-30

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