JP2010284872A - Method for breaking aggregate of printing ink, and inking apparatus with aggregate breaking function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ink a plate with printing ink from which aggregates are eliminated. <P>SOLUTION: An ink scraping-cum-filling blade 12 and an ink scraping-cum-return blade 11 are provided on the upper side of a travel position of a plate table 4 traveling on a guide rail 2 so that both blades can be driven to be moved up and down independently from a position separated from the surface of the plate 3 held on the plate table 4 into an abutting position by individual lifting actuators 15, 14. Further, a controller for controlling the movement of the plate table 4 and lifting of the respective blades 12, 11 is provided to form an inking apparatus I with an aggregate-breaking function. The blades 12, 11 are relatively slid alternately in contact with the plate 3 while reciprocating the plate table 4 holding the plate 3. Consequently, after performing sufficient aggregate-breaking treatment of paste 17 used as the printing ink supplied onto the plate 3, the plate is filled with the printing ink subjected to aggregate-breaking treatment, by the ink scraping-cum-filling blade 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, when printing ink such as conductive paste is inked on a plate for printing a fine printing pattern such as an electrode pattern, aggregates contained in the printing ink are destroyed and inked. The present invention relates to a printing ink aggregate destruction method and an inking device with an aggregate destruction function.

  In recent years, as a method of forming an electrode pattern (conductive pattern) such as a liquid crystal display on a required substrate, a printing technique using a conductive paste as a printing ink instead of fine processing such as etching of a metal vapor deposition film, for example, A technique for printing and forming an electrode pattern on a substrate using an intaglio offset printing technique has been proposed (see, for example, Patent Document 1 and Patent Document 2).

  Further, nano inks using organic silver have attracted attention as a conductive paste suitable for fine printing. Since nano inks using organic silver are expensive, intaglio offset printing is attracting attention from the viewpoint of reducing the amount of wasted ink.

  By the way, the nano ink using the above-described organic silver is relatively easy to produce aggregates.

  On the other hand, when the electrode pattern of the liquid crystal display or the like is formed on the substrate, a fine line width (electrode width) of, for example, about 10 μm may be required.

  Therefore, if aggregates are present in the conductive paste used as the printing ink, the line width of the fine line to be printed changes when the fine line is set to a line width of about 10 μm. There is a concern that there may be an influence such as a change in the flow of current in a portion where the aggregates in the printed thin line are present.

  In addition, the method of removing the aggregate (aggregate) 10 micrometers or more is conventionally proposed by filtering the electroconductive paste used for gravure printing with a filtration means, or filtering with stirring. (For example, refer to Patent Document 3).

  Further, a method of performing inking with a plurality of blades for one plate when performing inking has been conventionally known (see, for example, Patent Document 4).

Japanese Patent No. 2797567 Japanese Patent No. 3904433 JP 2004-319172 A JP 2000-255025 A

  However, the method of filtering the conductive paste disclosed in Patent Document 3 has a problem that aggregates of less than 10 μm cannot be removed.

  In addition, in the method disclosed in Patent Document 3, the aggregate of 10 μm or more contained in the conductive paste remains as a residue on the filter (filter medium) used for filtration, which is wasted. Also, the conductive paste adsorbed on the filter is wasted.

  Further, the conductive paste after the filtration treatment is packed in a storage container, and there is no suggestion to immediately use it for printing. Therefore, aggregates are generated again for some reason during the period from when the filtered conductive paste is packed in a storage container until it is used for actual printing, and the conductive paste containing the aggregates is printed. There is a problem that the risk of being used cannot be solved.

  The technique disclosed in Patent Document 4 is a technique for moving a plurality of blades in the same direction with respect to one plate so that different inks are sequentially inked by each blade. There is no indication of the idea of repeatedly rubbing the same ink against the plate with a blade that repeatedly slides over the plate.

  Therefore, the present inventors have devised and researched to break down aggregates contained in paste used as printing ink such as conductive paste, and as a result, the blade slides on the surface of the flat plate. In this state, if the paste is allowed to pass through the sliding part between the surface of the flat plate and the blade, it can be found that aggregates of about several μm contained in the paste can be destroyed, Made the present invention.

  Therefore, the object of the present invention is to destroy aggregates contained in paste-like printing inks such as conductive pastes, and to use paste-like printing inks containing the initial aggregates without waste. Thus, a printing ink from which aggregates have been removed can be obtained, and the printing ink from which the aggregates have been removed can be immediately used for printing, like an electrode pattern having fine lines of about 10 μm. PROBLEM TO BE SOLVED: To provide a printing ink agglomeration destruction method capable of performing high-precision printing without a defect even with a fine print pattern, and an inking device with an agglomeration destruction function used for carrying out the method It is what.

  In order to solve the above-mentioned problems, the present invention provides an ink scraping / filling blade and an ink scraping / returning blade on the surface of a plate held on a plate table reciprocally moved along a guide rail. By repeating the relative sliding operation by alternately contacting the blades, the agglomerates in the paste-like printing ink supplied on the plate are destroyed at the sliding portions of the blades and the plate. The printing ink agglomerate destruction method.

  According to claim 2, an ink scraping / filling blade and an ink scraping / returning blade are disposed above the travel position of the plate table traveling along the guide rail, and each blade is individually lifted and lowered. Provided with an actuator, each blade can be driven up and down independently from a retracted position separated from the surface of the plate held on the plate table to a height position contacting the plate surface on the plate table And a controller for repeatedly moving the plate table in a reciprocating manner at a position below each of the blades while causing the blades on the plate table to alternately contact each other and sliding relatively. The paste-like printing ink supplied on the plate is subjected to a cohesive failure treatment at a relative sliding portion between the plate and each blade, and the mark subjected to the cohesive failure treatment Ink, and aggregate breakdown function inking device having a structure formed by allowing the filling to the plate by the ink scraping and filling blade.

According to the present invention, the following excellent effects are exhibited.
(1) By repeatedly moving the ink scraping / filling blade and the ink scraping / returning blade in contact with each other on the surface of the plate held on the plate table that is reciprocated along the guide rail, and sliding relatively. Since there is a method for destroying aggregates in the printing ink in which the aggregates in the paste-like printing ink supplied on the plate are destroyed at the sliding portions between the blades and the plate, the paste-like printing Aggregates contained in the ink can be destroyed, and the printing ink from which the aggregates have been removed can be obtained using the paste containing the original aggregates without waste. Furthermore, since the destruction treatment of the aggregates in the printing ink can be performed on the plate, the printing ink on which the aggregation destruction processing has been performed can be immediately filled in the plate and used for printing.
(2) An ink scraping / filling blade and an ink scraping / returning blade are disposed above the travel position of the plate table that travels along the guide rail, and each blade is provided with an individual lifting / lowering actuator. The blade can be driven up and down independently from a retracted position separated above the surface of the plate held on the plate table to a height position contacting the surface of the plate on the plate table. A controller that repeatedly moves the table on the plate table in a reciprocating manner at a position below the blades and alternately slides the blades against the plate on the plate table; The paste-like printing ink supplied to the plate is subjected to a cohesive failure treatment at the relative sliding portion between the plate and each blade, and the printing ink subjected to the cohesive failure treatment is By using an inking device with an agglomerate destruction function that can fill the plate with a scraping and filling blade, the agglomerates contained in the paste-like printing ink can be destroyed. Thus, it is possible to easily realize the apparatus configuration for obtaining the printing ink from which the aggregate is removed by using the paste containing the initial aggregate without waste.
(3) Furthermore, since the printing ink in which the aggregate is removed can be immediately used for printing, the possibility that the aggregate is regenerated in the printing ink can be eliminated. Therefore, even a fine printed pattern such as an electrode pattern having a thin line of about 10 μm has an influence on the line width of the printed pattern, or the current flow of the printed fine line changes depending on the aggregate. It is possible to perform high-precision printing without defects such as.

It is a schematic side view which shows one Embodiment of the inking apparatus with an aggregate destruction function of this invention. It is a schematic diagram which shows the control structure of the controller with which the apparatus of FIG. 1 is equipped. It is a schematic side view which shows the whole structure of the offset printing apparatus to which the apparatus of FIG. 1 is applied. FIG. 1 shows the printing ink agglomerate destruction method and inking procedure of the present invention using the apparatus of FIG. 1, wherein (a) shows a state where an ink scraping and filling blade is brought into contact with a predetermined portion of a plate; Is the state in which the plate table holding the plate is moved and the ink scraping and filling blade is slid relative to the surface of the plate, and (c) is the relative sliding of the plate surface by the ink scraping and filling blade. It is a schematic side view which shows the state which complete | finished. As a procedure for performing the printing ink agglomerate destruction method of the present invention using the apparatus shown in FIG. 1, the procedure following FIG. 4 (c) is shown. (A) shows that an ink scraping / returning blade is brought into contact with a predetermined portion of the plate. (B) shows a state where the plate table holding the plate is moved and the ink scraping / returning blade is slid relative to the surface of the plate, and (c) is a state where the plate is moved by the ink scraping / returning blade. It is a schematic side view which shows the state which finished the relative sliding of the surface, respectively.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIGS. 1 to 5 (a), (b), and (c) show an embodiment of a printing ink aggregate destruction method and an inking device with an aggregate destruction function according to the present invention. A case where the present invention is applied to an offset printing apparatus is shown as follows.

  That is, here, first, the offset printing apparatus shown in FIG. 3 will be outlined. The offset printing apparatus includes a gantry 1, a guide rail 2 provided on the gantry 1, and individual guides (not shown) along the guide rail 2. A plate table 4 that holds the plate 3 that can be reciprocated (runned) independently by the driving device, and a print target table 6 that holds a print target 5 such as a substrate.

  Further, a transfer mechanism portion provided with a blanket roll 8 that is driven to rotate by a drive motor 9 for rotation at a position corresponding to the longitudinal intermediate portion of the guide rail 2 on the gantry 1 can be moved up and down by a lift drive device 10. 7 so that the blanket roll 8 of the transfer mechanism 7 is brought into contact with the inked plate 3 held on the plate table 4 running on the guide rail 2 from above, Next, the blanket roll 8 is brought into contact with the printing object 5 held on the printing object table 6 running on the guide rail 2 from above, thereby transferring (receiving) the plate 3 to the blanket roll 8; Retransfer (printing) from the blanket roll 8 to the printing object 5 can be performed.

  The inking device with an agglomerate destruction function of the present invention applied to the offset printing device having the above-described configuration, as shown by reference numeral I in FIGS. 1 and 3, the plate table 4 on the gantry 1 of the offset printing device. Ink scraping / returning blade 11 and ink scraping / filling at a required position within the travelable range, for example, at a position away from the transfer mechanism 7 toward the longitudinal end of the guide rail 2 (left side in the figure). The blades 12 are arranged in order from the one end side in the longitudinal direction of the guide rail 2 at a retreat height position that is higher than the surface height position of the plate 3 on the plate table 4 that moves along the guide rail 2. And supported by the support frame 13.

  Further, each of the blades 11 and 12 is equipped with an individual lifting actuator 14 and 15, respectively, and the corresponding blade 11 and 12 is moved to the above-described retracted height position by the lifting actuators 14 and 15. Further, the lower end of the blade can be individually lowered to a height position at which the lower end of the blade comes into contact with the surface of the plate 3 held on the plate table 4.

  Further, as shown in FIG. 2, a position detection signal in the longitudinal direction of the guide rail 2 of the plate table 4 input from a position detection mechanism of the plate table 4 such as a linear scale (not shown) provided on the mount 1. The table position control unit 16a for giving a table position control command C1 to the plate table 4 and the individual blade lifting / lowering operation commands C2 and C3 to the lifting / lowering actuators 14 and 15 of the blades 11 and 12, respectively. And a controller 16 for performing agglomerate destruction processing and inking processing described later by synchronously controlling the table position control portion 16a and the blade control portion 16b. The configuration.

  Details will be described below. For convenience of explanation, when inking the plate 3 on the plate table 4 by using the ink scraping and filling blade 12 of the inking apparatus I with an agglomerate destruction function of the present invention, the plate 3 is The movement direction (right direction in the figure) when moving together with the plate table 4 to the other end in the longitudinal direction of the guide rail 2 is called the inking movement direction, and the plate 3 together with the plate table 4 is The moving direction (left direction in the figure) when moving to one end side in the longitudinal direction of the guide rail 2 which is opposite to the inking moving direction is referred to as a plate returning moving direction.

  The ink scraping and filling blade 12 has an angular posture that is inclined so that the lower end portion is positioned closer to the other end portion in the longitudinal direction of the guide rail 2 than the upper end portion. As a result, with the plate table 4 holding the plate 3 disposed at a predetermined position as shown in FIG. 4 (a), the ink scraping and filling blade 12 is lowered by the corresponding lifting actuator 15 to move the plate. In contact with the upstream edge (right edge in the figure) of the inking movement direction on the surface of the plate 3 on the table 4, the plate 3 is moved in the inking movement direction in this state. 4 (b), the lower end of the ink scraping and filling blade 12 can be relatively slid along the surface of the plate 3, as shown in FIG. By this relative sliding, the paste 17 as the printing ink such as the conductive paste placed on the plate 3 is efficiently filled into the concave portion of the printing pattern engraved on the plate 3. so In addition, the excess paste 17 is scraped off the surface of the plate 3, and the excess paste 17 is removed from the downstream side of the inking movement direction on the plate 3 as shown in FIG. It is designed so that it can be raked up close to the club. Further, for the paste 17 passing through the sliding portion between the plate 3 and the ink scraping and filling blade 12, the agglomerates contained in the paste 17 are ground even if they are about several μm. So that it can be destroyed.

  The ink scraping / returning blade 11 has an angular posture inclined so that the lower end portion is positioned closer to one end portion in the longitudinal direction of the guide rail 2 than the upper end portion. Thus, in the state where the plate table 4 holding the plate 3 is disposed at a predetermined position as shown in FIG. 5 (a), the ink scraping / returning blade 11 is lowered by the corresponding lifting / lowering actuator 14, and the plate is moved. The plate 3 is brought into contact with the upstream edge portion (left edge portion in the figure) of the plate 3 on the surface of the plate 3 in the moving direction for plate returning, and in this state, the plate 3 is moved in the moving direction for plate returning. 5 (b), the lower end of the ink scraping / returning blade 11 can be relatively slid along the surface of the plate 3, as shown in FIG. By this relative sliding, the ink scraping and filling blade 12 causes the plate 3 to move to a location near the downstream end in the inking movement direction, that is, a location near the upstream end in the plate returning movement direction. The scraped paste 17 is scraped and pushed into the concave portion of the printed pattern engraved along the plate 3, and the surplus paste 17 is scraped from the surface of the plate 3 to remove the surplus paste 17 As shown in FIG. 5 (c), it is possible to scrape to a position near the downstream end in the plate returning movement direction on the plate 3, that is, a position near the upstream end in the inking movement direction. It is. Further, with respect to the paste 17 that passes through the sliding portion between the plate 3 and the ink scraping / returning blade 11, the agglomerates contained in the paste 17 are ground even if they are about several μm. So that it can be destroyed.

  The controller 16 indicates, for example, the progress of the destruction processing of the aggregate due to the relative sliding of the blades 11 and 12 on the plate 3, for example, relative to the plate 3 by the blades 11 and 12. Supplied on the plate 3 by an experiment using the processing status detection unit 16c for detecting by measuring the number of times of sliding and the processing time and the inking device I with the aggregate destruction function of the present invention. Depending on the amount of paste 17 to be applied, the blades 11 and 12 on the plate 3 are required until the aggregates are sufficiently destroyed for the entire paste 17 supplied on the plate 3. The database 16d that stores data on the conditions of the number of sliding times and the processing time as necessary processing conditions and the progress status of the aggregate destruction processing detected by the processing status detector 16c are stored in the database 16d. When it is determined whether or not the required processing conditions are reached, and the progress of the aggregate destruction processing does not reach the required processing conditions, FIGS. 4 (a), (b), (c) and FIG. By alternately performing the procedures shown in 5 (a), (b), and (c), the blades 11 and 12 are moved while reciprocating the plate table 4 at positions below the blades 11 and 12, respectively. The agglomerate destruction treatment of the paste 17 placed on the plate 3 is continued by alternately contacting the surface of the plate 3 held on the reciprocating plate table 4 and sliding it relatively. On the other hand, when the progress status of the aggregate destruction process reaches the required processing condition, the procedure shown in FIGS. 4 (a), (b), and (c) is switched so as to be performed only once. The agglomerates into the concave portions of the printing pattern of the plate 3 held on the plate table 4 The structure is provided with an operation switching unit 16e for filling the paste 17 that has been subjected to the breakage process and scraping off the excess paste 17 from the surface of the plate 3 to cause the plate 3 to perform an inking process. .

  When the printing ink aggregate destruction method of the present invention is performed using the inking apparatus I with the aggregate destruction function of the present invention having the above-described configuration, the plate 3 is held on the plate table 4 in advance. Then, the plate table 4 holding the plate 3 is moved to the inking device I with the function of agglomerate breaking device of the present invention.

  In this state, when the paste 17 to be used as printing ink is newly supplied onto the plate 3, the control of the table position control unit 16a and the blade control unit 16b of the controller 16 performs synchronous control of FIG. (B) By alternately performing the operation shown in (c) and the operation shown in FIGS. 5 (a), (b), and (c), the surface of the plate 3 held on the plate table 4 that reciprocates is moved. Thus, the blades 11 and 12 are alternately slid relative to each other, so that the aggregate breakage treatment of the paste 17 placed on the plate 3 is performed at the sliding portion.

  Thereafter, the progress of the agglomeration destruction processing detected based on the number of times of relative sliding of the blades 11 and 12 with respect to the plate 3 and the processing time by the processing status detection unit 16c of the controller 16 is stored in the database. During the period until the necessary processing conditions stored in 16d are reached, the operations shown in FIGS. 4 (a), (b), and (c) and FIGS. 5 (a), (b), and (c) are continued alternately. Let it be done. As a result, repeated agglomeration destruction processing of the paste 17 supplied onto the plate 3 is continuously performed. Therefore, even if the aggregate contained in the paste 17 is about several μm, the destruction process is performed.

  In addition, when the size of the aggregate in the paste 17 is smaller than the line width of the printing pattern of the plate 3, it is considered that the aggregate may enter the concave portion of the printing pattern of the plate 3. Thus, the agglomerates that have entered the concave portion of the printing pattern of the plate 3 are caused by the paste 17 that is newly pushed into the concave portion of the printing pattern of the plate 3 when the blades 11 and 12 slide on the surface of the plate 3. Sequentially pushed out from the recesses and subjected to a breaking process at the sliding portion between the blades 11 and 12 and the plate 3, or the blades 17 and 12 push the paste 17 into the recesses of the printing pattern of the plate 3. By performing a destruction process or the like due to pressure fluctuations at the time, there is no possibility that undestructed aggregates accumulate in the concave portions of the printing pattern of the plate 3.

  The database 16d shows the progress status of the agglomeration destruction process detected based on the number of times of relative sliding with respect to the plate 3 by the blades 11 and 12 and the processing time by the processing status detector 16c of the controller 16. When the accumulated required processing condition is reached, the operation of the operation switching unit 16e of the controller 16 terminates the aggregate destruction process according to the printing ink aggregate destruction method of the present invention. Next, by causing the process shown in FIGS. 4A, 4B and C to be performed once, the aggregate breakage is caused in the concave portions of the printing pattern of the plate 3 held on the plate table 4. By filling the paste 17 that has been sufficiently processed and scraping off the excess paste 17 from the surface of the plate 3, proper inking is performed on the plate 3.

  When the paste 17 that has been subjected to the agglomerate destruction process as described above is inked into the plate 3, the inked plate 3 is quickly sent to the transfer mechanism unit 7 by the travel of the plate table 4. Thus, it is used for transfer (acceptance) to the blanket roll 8.

  When the plate 3 after being transferred (accepted) to the blanket roll 8 by the transfer mechanism unit 7 is returned to the inking apparatus I with an agglomerate destruction function of the present invention by the travel of the plate table 4 5 (a), (b), and (c) are performed once, the upstream side end portion of the plate 3 in the moving direction for plate return on the plate 3, that is, the inking. The existing paste 17 scraped to the position near the downstream end in the inking movement direction by the process is returned to the position from the upstream end in the inking movement direction.

  Thereafter, the agglomerate destruction process of the paste 17 by the alternating operation of the operations shown in FIGS. 4 (a), (b), and (c) and the operations shown in FIGS. After performing the inking operation on the plate 3 periodically or at short intervals every time, and then performing the inking operation on the plate 3 as described above, the inked plate is quickly moved by the travel of the plate table 4. What is necessary is just to repeat the process sent to the transfer mechanism part 7 and used for transfer (acceptance) to the blanket roll 8.

  Further, when the paste 17 is replenished, the paste 17 is produced by the alternating operation of the operations shown in FIGS. 4 (a), (b), and (c) and the operations shown in FIGS. The inking operation to the plate 3 may be performed after sufficiently performing the aggregate destruction treatment.

  As described above, according to the printing ink aggregate destruction method and the inking apparatus I with the aggregate destruction function of the present invention, the aggregate contained in the paste 17 used as the printing ink is destroyed to less than 10 μm. Thus, the paste 17 from which the aggregates are removed can be obtained by using the paste 17 containing the initial aggregates without waste.

  Further, since the agglomerate destruction treatment of the paste 17 is performed on the plate 3, the paste 17 in which the aggregate is removed can be immediately inked into the plate 3 for printing. Therefore, it is possible to eliminate the possibility of agglomerates regenerating in the paste 17 during storage. Therefore, even if the print pattern is a fine print pattern such as an electrode pattern having a fine line of about 10 μm, the line width of the print pattern Therefore, it is possible to perform high-precision printing without defects such as the influence of the agglomerates and the current flow of the printed fine lines being changed by the agglomerates.

  Note that the present invention is not limited to the above-described embodiment. In the above-described embodiment, the blades 11, 11 are formed on the surface of the effective range of the plate 3 on which the printing pattern of the plate 3 is provided. The plate table of the effective range as the plate 3 provided with the printing pattern on the surface of the plate 3 is shown as causing the agglomerates in the paste 17 to be destroyed by alternately sliding the 12. 4. Provide a flat surface portion with no printed pattern on one side in the moving direction, and slide the blades 11 and 12 alternately on the flat surface portion to supply the surface. The paste 17 that has been subjected to the cohesive failure treatment in advance, and then the paste 17 that has been sufficiently subjected to the cohesive failure treatment is scraped by one of the blades 11 or 12 described above, thereby providing the printing pattern of the plate 3. Send to coverage, it may be allowed to fill the recess of the printed pattern.

  In the above description, the ink scraping and filling blade 12 and the ink scraping and returning blade 11 are provided one by one. However, one or both of the ink scraping and filling blade 12 and the ink scraping and returning blade 11 are provided. It is good also as a structure. Further, in this case, the plurality of ink scraping / filling blades 12 and / or individual blades 12 and 11 of the ink scraping / returning blade 11 may be configured to have different angular postures.

  As a printing ink, if it is a paste-like printing ink that is required to be used for inking and printing on a plate with aggregates removed, it is like a nano ink using organic silver used for printing an electrode pattern. Any paste-like printing ink agglomerates other than the conductive paste may be applied to the destruction treatment and inking.

  Of course, various modifications can be made without departing from the scope of the present invention.

I Inking device with aggregate destruction function 2 Guide rail 4 Plate table 11 Ink scraping / returning blade 12 Ink scraping / filling blade 14 Lifting actuator 15 Lifting actuator 16 Controller 17 Paste (printing ink)

Claims (2)

  By repeatedly moving the ink scraping / filling blade and the ink scraping / returning blade alternately on the surface of the plate held on the plate table that is reciprocated along the guide rails, An agglomerate destruction method for printing ink, characterized in that an agglomerate in paste-like printing ink supplied on the plate is destroyed at a sliding portion between the blade and the plate.   An ink scraping / filling blade and an ink scraping / returning blade are disposed above the travel position of the plate table that travels along the guide rail, and each blade is provided with an individual lifting / lowering actuator. It is possible to independently drive up and down from a retracted position separated above the surface of the plate held on the plate table to a height position contacting the surface of the plate on the plate table. Provided with a controller that repeatedly moves the blades on the plate table alternately in contact with each other while reciprocating at a position below each blade, and is supplied onto the plate. The paste-like printing ink is subjected to a cohesive failure treatment at the relative sliding portions between the plate and each blade, and the printing ink subjected to the cohesive failure treatment is treated with the ink scraping. Agglomerates breaking function inking apparatus characterized by having a structure obtained by allowing the filling to the plate by and filling blade.

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