WO2015036978A1 - A machine for application of paint by means of electrophoresis on metal crown caps - Google Patents
A machine for application of paint by means of electrophoresis on metal crown caps Download PDFInfo
- Publication number
- WO2015036978A1 WO2015036978A1 PCT/IB2014/064519 IB2014064519W WO2015036978A1 WO 2015036978 A1 WO2015036978 A1 WO 2015036978A1 IB 2014064519 W IB2014064519 W IB 2014064519W WO 2015036978 A1 WO2015036978 A1 WO 2015036978A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conveyor
- metal crown
- crown caps
- machine
- caps
- Prior art date
Links
- 239000002184 metal Substances 0.000 title claims abstract description 98
- 239000003973 paint Substances 0.000 title claims abstract description 30
- 238000001962 electrophoresis Methods 0.000 title claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 238000007654 immersion Methods 0.000 claims abstract description 6
- 238000004873 anchoring Methods 0.000 claims abstract description 5
- 230000037361 pathway Effects 0.000 claims description 10
- 238000010422 painting Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
- B65G49/02—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid
- B65G49/04—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction
- B65G49/0409—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction specially adapted for workpieces of definite length
- B65G49/0413—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction specially adapted for workpieces of definite length arrangements for conveyance through the bath
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
- B65G21/2009—Magnetic retaining means
- B65G21/2018—Magnetic retaining means for retaining the load on the load-carrying surface
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Closures For Containers (AREA)
Abstract
A machine (1) for application of paint (V) by means of electrophoresis on metal crown caps (2), comprising an inlet conveyor (3) for providing metal crown caps (2) in a vertical orientation; a tub (4) containing paint (V) for at least partly immersingly receiving the metal crown caps (2); an outlet conveyor (5) for receiving the painted metal crown caps (2) which are vertically orientated; a conveyor unit comprising: a conveyor member which is interposed between the inlet conveyor (3) and the outlet conveyor (5), which conveyor member is arranged above the tub (4), which is rotating about a horizontal axis and which comprises an annular conveyor surface (70) for contacting the circular wall of the metal crown caps (2); gripping and retaining means for taking the metal crown caps (2) from the inlet conveyor (3) and anchoring them to the annular surface (70) and retaining them against the annular surface (70); a first conductor element which is electrically conductible and which is arranged so as to contact the peripheral edge of the metal crown cap (2) during the at least partial immersion of the metal crown caps (2) in the tub (4).
Description
A MACHINE FOR APPLICATION OF PAINT BY MEANS OF ELECTROPHORESIS ON METAL CROWN CAPS
FIELD OF THE INVENTION
The present invention relates to the technical sector concerning metal crown caps. In detail, the present invention relates to a machine for applying paint to metal crown caps by electrophoresis.
DESCRIPTION OF THE PRIOR ART
By metal crown caps are meant those metal closing elements that are applied to a mouth of a recipient (for example a bottle), each comprising a circular wall and a cogged peripheral edge which originates from a circular wall and which projects transversally thereto along all the relative development.
Metal crown caps are obtained by using punches to blank pre-painted metal sheets. Therefore metal crown caps are lacking in paint at least at the relative peripheral edge (i.e. the cogged edge).
Further, during the transport and/or the storage of the metal crown caps, the paint covering them can be damaged and partially removed from the cap. Therefore, the exposed parts of sheet metal, i.e. the parts lacking paint, are subject over time to oxidation, which gives rise to rust and constitutes a potential risk for the final consumer.
SUMMARY OF THE INVENTION
The aim of the present invention is to obviate the above-described drawback. The aim is attained with a solution according to the contents of independent claim 1 .
The solution proposed by the present invention advantageously enables replacing the paint missing on the metal crown caps in a practical, rapid and particularly efficient way.
In this way the parts of the cap lacking in paint (for example the peripheral
edge) oxidise and give rise to rust, thus becoming potentially dangerous for the final consumer (as occurred in the prior art).
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantageous characteristics of the invention will be more precisely specified in the following description, with the aid of the appended tables of drawings, in which:
- figure 1 illustrates a front view of a machine for application of paint by electrophoresis on metal crown caps according to the present invention, in which some parts have been highlighted in order to better understand the functioning thereof;
- figure 2 is a partly-sectioned view from above of figure 1 ;
- figure 3 is a larger-scale detail of a machine according to the present invention and of a metal crown cap, according to a preferred embodiment.
DESCRIPTION OF PREFERRED EMBODIMENTS
With reference to the accompanying figures of the drawings, (1) denotes a machine for application of paint (V) by electrophoresis on metal crown caps (2) according to the present invention.
The electrophoresis process, in general, consists in the single-directional movement of electrically-charged particles, suspended or dissolved in a conductor liquid medium (in this case paint), by action of an electrical field. By metal crown caps (2) are meant those metal closing elements that are applied to the mouth of a recipient (for example a bottle) each comprising a circular wall (20) and a cogged peripheral edge (21) which originates from the circular wall (20) so as to project transversally with respect thereto (along a whole extension thereof).
In general, the metal crown caps (2) are obtained by blanking with punches of pre-painted metal sheets. Therefore, the crown metal caps (2) are free of paint at least at the relative peripheral edge (21) (i.e. the cogged edge).
Further, the metal crown caps (2) can be accidentally lose the paint even during transport and/or storage thereof.
The machine (1) for application of paint (V) on metal crown caps (2) by means of electrophoresis of the present invention comprises an inlet conveyor (3) for providing metal crown caps (2) in a vertical orientation. In other words, the metal crown caps (2) are made available by the inlet conveyor (3) so that the relative circular wall (20) is vertical (see the detail of figure 1).
The machine (1) further comprises a tub (4) containing paint (V) for at least partly immersingly receiving the metal crown caps (2). In particular, the paint (V) is suitable for use in carrying out a painting operation by means of electrophoresis, i.e. the paint (V) is electrically chargeable.
The machine (1) further comprises an outlet conveyor (5) for receiving the metal crown caps (2) which have been painted in the tub (4) by means of electrophoresis and which are vertically orientated. In other words, the metal crown caps (2) are received by the outlet conveyor (5) with the relative circular wall (20) arranged vertically (reference is made in particular once more to figure 1).
The machine (1) further comprises a conveyor unit (6) for taking the metal crown caps (2) from the inlet conveyor (3) so as to transport the metal crown caps (2) along a transport pathway which includes at least partial immersion of the metal crown caps (2) in the tub (4), and to make the metal crown caps (2) available to the outlet conveyor (5) (orientated vertically).
In detail, the conveyor unit (6) comprises: a conveyor member (7) which is interposed between the inlet conveyor (3) and the outlet conveyor (5), which conveyor member (7) is arranged above the tub (4), which is rotating about a horizontal axis and which comprises an annular conveyor surface (70) for contacting the circular wall (20) of the metal crown caps (2) during the transport of the metal crown caps (2) along the transport pathway.
The conveyor unit (6) further comprises gripping and retaining means (8) for taking the metal crown caps (2) from the inlet conveyor (3) and anchoring
them to the annular surface (70) and for retaining the metal crown caps (2) against the annular surface (70) during the transport of the metal crown caps (2) along the conveyor pathway.
The machine (1) of the invention further comprises a conductor element (9) which is electrically conductible and which is arranged so as to contact the peripheral edge (21) of the metal crown caps (2) during the at least partial immersion of the metal crown caps (2) in the tub (4).
In particular, in order to enable the electrophoresis process, the conductor element (9) is electrically charged (for example with a positive charge) by electrical supply means (not illustrated). Since the conductor element (9) contacts the peripheral edge (21) (free of paint) of the metal crown caps (2), the electrical charge is transferred to each metal crown cap (2).
In the same way, the paint (V) (which is of a type suitable for the electrophoresis process) is electrically charged with an opposite electrical charge to the charge the conductor element (9) is charged (for example a negative charge).
Therefore, when the metal crown caps (2) are immersed in the paint (V), internally of the tub (4), during the rotation of the rotating member (7), the particles of paint (V) are attracted by the opposite electrical charge of the metal crown caps (2) and go to deposit on the metal crown caps (2) at the exposed parts of the metal sheet.
For example, the paint (V) can be electrically charged via the tub (4), which can comprise at least a portion made of a conductor material or can be made of a conductor material.
The machine (1) for application of paint (V) by means of electrophoresis on metal crown caps (2) of the present invention is structurally simple and particularly functional.
The fact that the metal crown caps (2) are contacted by the annular surface (70) at the relative circular wall (20), i.e. are vertically arranged during transport and in this orientation are retained by the gripping and retaining
means (8), guarantees stability thereof during the conveyor pathway, even at high speeds.
In an embodiment of the invention, the gripping and retaining means (8) are magnetic and solidly constrained to the conveyor member (7). For example, the gripping and retaining means (8) can be constituted by a plurality of magnets solidly constrained to the conveyor member (7) at the annular surface (70).
In a further embodiment, the gripping and retaining means (8) can comprise a magnetic wall which defines the annular surface (70). In other words, the annular surface (70) can be formed by a magnetic surface.
This embodiment advantageously guarantees the effective anchoring of the metal crown caps (2) to the annular surface and is also simple to realize.
It must be taken into account that the rotation velocity of the conveyor member (7) is particularly high, and that therefore the anchoring of the metal crown caps (2) to the annular surface (70) must be optimal.
The gripping and retaining means can alternatively comprise aspirating means.
In a preferred embodiment of the invention, the annular surface (70) is circular and the conveyor member is a rotating disc (7) which conforms the annular surface (70) at the relative circular edge (71). This embodiment is particularly functional.
In a preferred embodiment, the conductor element is a conductor disc (9) (see figure 1) which is concentric with the conveyor member (7), which conductor disc (9) has a smaller diameter than the conveyor member (7) so as to function as an abutment for the metal crown caps (2) taken from the inlet conveyor (3) during the conveying of the metal crown caps (2) along the conveyor pathway. In other terms, the metal crown caps (2) collected by the inlet conveyor (3) (with a vertical orientation) by the gripping and retaining means (8) of the conveyor unit (6) are contacted at the relative circular wall (20) by the annular surface (70) of the conveyor member (7), and at the
relative peripheral edge (21) by the conductor disc (9).
In other terms, the conductor disc (9) functions as a guide for the metal crown caps (2) during the transport thereof along the conveyor pathway. In detail, the conductor disc (9) can contact the peripheral edge (21) of the metal crown caps (2) by means of the relative circular edge.
In the preferred embodiment of the invention, the conductor disc (9) exhibits a cogged circular edge (90) conformed so as to mesh with the cogged peripheral edge (20) of a metal crown cap (2). Further, in this variant the conveyor member (7) is rotating with respect to the conductor disc (9) at a velocity that is such as to enable rotation of a metal crown cap (2) (anchored to the annular surface (70)) on itself during the rotation of the conveyor member (7 (see the detail of figure 3).
In other words, the difference in rotation velocity between the conveyor member (7) and the conductor disc (9) is such as to rotate a metal crown cap (2) about itself during the rotation of the conveyor member (7).
The machine (1) can further comprise a frame (10) with respect to which the conveyor member (7) rotates, and with respect to which the conductor disc (9) is solidly constrained during the rotation of the conveyor member (7). In other terms, with reference to the embodiment described herein above, the conductor disc (9) can be stationary during the rotation of the conveyor member 87), i.e. it can have a nil rotation velocity, i.e. equal to zero.
The conductor disc (9) can for example exhibit a rotation velocity of less than the rotation velocity of the conveyor member (7), as long as the rotation velocity of the conveyor member (7) with respect to that of the conductor disc (9) (i.e. the difference between the two rotation velocities) is such as to enable rotation of a metal crown cap (2) about itself during the rotation of the conveyor member (7).
The fact that the metal crown caps (2) rotate on themselves enables their immersion, even partially, in the paint (V) of the tub (4), in any case guaranteeing the possibility of realising the painting thereof (completely) by
electrophoresis (this variant is illustrated in the figures). In fact, each metal crown cap (2), as it rotates on itself internally of the tub (4), in any case enables completing the painting thereon.
This embodiment advantageously guarantees a greater cleanliness of the whole work environment and an excellent painting of the metal crown caps (2). As illustrated in figure 1 , the rotating member (7) in this variant is not even partially immersed in the tub (4) during the rotation, i.e. it does not enter into contact with the paint (V), and therefore does not generate splashing of paint (V) into the surrounding work environment.
In the preferred embodiment illustrated in the accompanying figures, the inlet conveyor (3) is a loop conveyor comprising: two pulleys (31 , 32) activatable in rotation with respect to corresponding vertical axes; an active branch (33) drawn in rotation by the pulleys (31 , 32); magnetic means (34) arranged at the active branch (33) so as to retain the metal crown caps (2) with a vertical orientation (see in particular figure 2).
The active branch (33) of the inlet conveyor (3) can be arranged flanked and adjacent to the annular surface (70) of the conveyor member (7).
For example, the active branch (33) can be magnetic.
This configuration of the inlet conveyor (3) advantageously guarantees retaining the metal crown caps (2) even when they are moved at a high speed. Once more according to the illustrated embodiment, the outlet conveyor (5) is a loop conveyor comprising: two pulleys (51 , 52) activatable in rotation with respect to corresponding vertical axes; an active branch (53) drawn in rotation by the pulleys (51 , 52); magnetic means (54), arranged at the active branch (53) so as to retain the metal crown caps (2) with a vertical orientation (see in particular figure 2).
The active branch (53) of the outlet conveyor (5) can be arranged flanked and adjacent to the annular surface (70) of the conveyor member (7).
For example, the active branch (53) can be magnetic.
In this case too, the retaining of the metal crown caps (2) is optimally
guaranteed.
In the preferred embodiment, which includes the gripping and retaining means (8) of the rotating unit (6) being magnetic and also includes the inlet conveyor (3) and the outlet conveyor (5) each comprising magnetic means (34, 54), the machine (1) is configured so that the magnetic force exerted on the metal crown caps (2) by the gripping and retaining means (8) is greater than the magnetic force exerted on the metal crown caps (2) by the magnetic means (34) of the inlet conveyor (3). Further, the magnetic force exerted on the metal crown caps (2) by the magnetic means (54) of the outlet conveyor (5) will have to be greater than the magnetic force exerted on the metal crown caps (2) by the gripping and retaining means (8). In other words, the magnetic force of the gripping and retaining means (8) will have to overcome the magnetic force of the magnetic means (34) of the inlet conveyor (3), and the magnetic force of the magnetic means (54) of the outlet conveyor (5) will have to overcome the magnetic force of the gripping and retaining means (8) so as to enable transfer of the metal crown caps (2) from the inlet conveyor (3) to the conveyor unit (6) and therefore to the outlet conveyor (5).
It is understood that the above has been described by way of non-limiting example, and any eventual constructional variants are understood to fall within the protective scope of the present technical solution, as claimed in the following.
Claims
1). The machine (1) for application of paint (V) by means of electrophoresis on metal crown caps (2),
each metal crown cap (2) comprising a circular wall (20) and a cogged peripheral edge (21) which originates from the circular wall (20) to project transversally with respect thereto;
the machine (1) being characterised in that it comprises:
an inlet conveyor (3) for providing metal crown caps (2) in a vertical orientation;
a tub (4) containing paint (V) for at least partly immersingly receiving the metal crown caps (2);
an outlet conveyor (5) for receiving the metal crown caps (2) which have been painted in the tub (4) by means of electrophoresis and which are vertically orientated;
a conveyor unit (6) for taking the metal crown caps
(2) from the inlet conveyor
(3) so as to transport the metal crown caps (2) along a transport pathway which includes at least partial immersion of the metal crown caps (2) in the tub
(4) , and to make available the metal crown caps (2) to the outlet conveyor (5), which conveyor unit (6) comprises:
a conveyor member (7) which is interposed between the inlet conveyor (3) and the outlet conveyor (5), which conveyor member (7) is arranged above the tub (4), which is rotating about a horizontal axis and which comprises an annular conveyor surface (70) for contacting the circular wall (20) of the metal crown caps (2) during the transport of the metal crown caps (2) along the transport pathway; gripping and retaining means (8) for taking the metal crown caps (2) from the inlet conveyor (3) and anchoring them to the annular surface (70) and for retaining the metal crown caps (2) against the annular surface (70) during the transport of the metal crown caps (2) along the conveyor pathway;
a conductor element (9) which is electrically conductible and which is arranged
so as to contact the peripheral edge (21 ) of the metal crown cap (2) during the at least partial immersion of the metal crown caps (2) in the tub (4).
2). The machine (1 ) of the preceding claim, wherein the gripping and retaining means (8) are magnetic and solidly constrained to the conveyor member (7). 3). The machine of the preceding claim, wherein the gripping and retaining means (8) comprise a magnetic wall which defines the annular surface (70). 4). The machine (1) of any one of the preceding claims, wherein the annular surface (70) is circular and the conveyor member is a rotating disc (7) which conforms the annular surface (70) at the relative circular edge (71 ).
5). The machine (1) of the preceding claim, wherein the conductor element is a conductor disc (9) which is concentric with the conveyor member (7), which conductor disc (9) has a smaller diameter than the conveyor member (7) so as to function as an abutment for the metal crown caps (2) taken from the inlet conveyor (3) during the conveying of the metal crown caps (2) along the conveyor pathway.
6) . The machine (1 ) of the preceding claim, wherein the conductor disc (9) exhibits a cogged circular edge (90) conformed so as to mesh with the cogged peripheral edge (20) of a metal crown cap (2), and wherein the conveyor member (7) is rotating with respect to the conductor disc (9) at a velocity that is such as to enable rotation of the metal crown cap (2) on itself during the rotation of the conveyor member (7).
7) . The machine (1) of the preceding claim, comprising a frame (10) with respect to which the conveyor member (7) is rotating, and with respect to which the conductor disc (9) is solidly constrained during the rotation of the conveyor member (7).
8) . The machine (1) of any one of the preceding claims, wherein the inlet conveyor (3) is a loop conveyor comprising: two pulleys (31 , 32) activatable in rotation with respect to corresponding vertical axes; an active branch (33) drawn in rotation by the pulleys (31 , 32); magnetic means (34) arranged at the active branch (33) so as to retain the metal crown caps (2) with a vertical
orientation.
9). The machine (1) of any one of the preceding claims, wherein the outlet conveyor (5) is a loop conveyor comprising: two pulleys (51 , 52) activatable in rotation with respect to corresponding vertical axes; an active branch (53) drawn in rotation by the pulleys (51 , 52); magnetic means (54), arranged at the active branch (53) so as to retain the metal crown caps (2) with a vertical orientation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITBO2013A000496 | 2013-09-16 | ||
| IT000496A ITBO20130496A1 (en) | 2013-09-16 | 2013-09-16 | MACHINE FOR APPLICATION OF VARNISH BY ELECTROPHORESIS ON CROWN METAL PLUGS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015036978A1 true WO2015036978A1 (en) | 2015-03-19 |
Family
ID=49447609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2014/064519 WO2015036978A1 (en) | 2013-09-16 | 2014-09-15 | A machine for application of paint by means of electrophoresis on metal crown caps |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | ITBO20130496A1 (en) |
| WO (1) | WO2015036978A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3945901A (en) * | 1973-06-18 | 1976-03-23 | Diamond Shamrock Corporation | Method for electrocoating conductive articles |
| EP0699605A1 (en) * | 1994-08-31 | 1996-03-06 | Thomassen & Drijver-Verblifa N.V. | Apparatus for orienting lids |
| WO2002072284A2 (en) * | 2001-03-09 | 2002-09-19 | Corima International Machinery S.R.L. | Method and machine for painting metal lids |
| WO2008096235A1 (en) * | 2007-02-06 | 2008-08-14 | Corima International S.R.L. | An apparatus for electrophoretic painting of metal objects, in particular lids for containers for food use |
-
2013
- 2013-09-16 IT IT000496A patent/ITBO20130496A1/en unknown
-
2014
- 2014-09-15 WO PCT/IB2014/064519 patent/WO2015036978A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3945901A (en) * | 1973-06-18 | 1976-03-23 | Diamond Shamrock Corporation | Method for electrocoating conductive articles |
| EP0699605A1 (en) * | 1994-08-31 | 1996-03-06 | Thomassen & Drijver-Verblifa N.V. | Apparatus for orienting lids |
| WO2002072284A2 (en) * | 2001-03-09 | 2002-09-19 | Corima International Machinery S.R.L. | Method and machine for painting metal lids |
| WO2008096235A1 (en) * | 2007-02-06 | 2008-08-14 | Corima International S.R.L. | An apparatus for electrophoretic painting of metal objects, in particular lids for containers for food use |
Also Published As
| Publication number | Publication date |
|---|---|
| ITBO20130496A1 (en) | 2015-03-17 |
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