JP7336337B2 - printer - Google Patents

Description

The present invention relates to printing devices.

2. Description of the Related Art Printing apparatuses that print on paper and perform inspections to detect defects in printed images are known.

Further, in Japanese Patent Application Laid-Open No. 2002-100002, a defective state of a printed image is detected, and pages including pages after the page for which the printed image is determined to be defective based on the detection result are reprinted, and a paper output destination different from the destination immediately before the defective determination is printed. A technique for discharging paper to a paper discharge destination is disclosed.

JP 2014-144627 A

However, with the technique disclosed in Japanese Patent Application Laid-Open No. 2002-200010, the number of paper discharge destinations may increase because the paper is discharged to a different paper discharge destination each time a defective page is generated. Therefore, after a series of printing, the user may take out the printed matter from the discharge destination and replace the defective page to obtain the normal printed matter.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printing apparatus capable of improving the efficiency of work for removing printed matter from a paper discharge destination and obtaining normal printed matter.

In order to achieve the above object, the printing apparatus of the present invention includes printing means for printing on paper, and first and second paper discharge trays for discharging the paper printed by the printing means. a paper ejection tray for selectively ejecting sheets onto the plurality of paper ejection trays; a first partitioning section for partitioning the sheets ejected to the first paper ejection tray; and a print image a control for controlling the paper discharge means to discharge normal paper, which is paper with a normal image, to the first paper discharge tray, and discharge defective paper, which is paper with a defective printed image, to the second paper discharge tray wherein the control means controls the normal paper discharged to the first paper discharge tray by the first partitioning means when a defect occurs in the printed image, and the normal paper is partitioned. printing the missing pages on the paper by the printing means, and controlling the paper ejection means to eject the paper on which the missing pages are printed to a paper ejection tray other than the first paper ejection tray. Characterized by

According to the printing apparatus of the present invention, it is possible to improve the efficiency of the work for taking out the printed matter from the discharge destination and obtaining the normal printed matter.

1 is a schematic configuration diagram of a printing apparatus according to an embodiment; FIG. 2 is a control block diagram of the printing apparatus shown in FIG. 1; FIG. 4 is a flowchart for explaining the operation of the printing device; FIG. 3 is a diagram showing an example of a stacking state of sheets on a sheet discharge tray;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent reference numerals are given to the same or equivalent parts and components throughout each drawing.

The embodiments shown below are examples of devices and the like for embodying the technical idea of this invention. are not specific to the following: The technical idea of this invention can be modified in various ways within the scope of claims.

FIG. 1 is a schematic configuration diagram of a printing apparatus according to an embodiment of the invention. FIG. 2 is a control block diagram of the printing apparatus shown in FIG. In the following description, the up, down, left, and right directions of the paper surface in FIG.

As shown in FIGS. 1 and 2, the printing apparatus 1 according to the present embodiment includes a paper supply unit 2, a printing unit (corresponding to printing means) 3, an image inspection unit 4, a paper discharge unit 5, An operation panel 6 and a control section (corresponding to control means) 7 are provided.

The paper feed unit 2 includes a plurality of paper feed trays 11 each loaded with paper P, and feeds the paper P from the paper feed tray 11 to the printing unit 3 .

The printing unit 3 prints on the paper P fed from the paper feeding unit 2 . The printing unit 3 includes a plurality of inkjet heads 16 , a circulating transport unit 17 and a communication transport unit 18 .

The inkjet head 16 prints an image by ejecting ink onto the paper P conveyed by the circulation conveying section 17 .

The circulation transport unit 17 transports the paper P fed from the paper feed unit 2 . The circulatory transport section 17 has a reversing section 19 for reversing the front and back of the paper P. As shown in FIG.

The circulating transport section 17 directly transports the paper P printed on one side by the inkjet head 16 to the communication transport section 18 in single-sided printing.

In double-sided printing, the circulatory transport unit 17 transports the paper P printed on the surface by the inkjet head 16 to the reversing unit 19 , reverses the front and back sides of the paper P by the reversing unit 19 , and re-feeds the paper to the inkjet head 16 . Then, the circulatory transport section 17 transports the double-sided printed paper P printed on the back side by the inkjet head 16 to the communication transport section 18 .

The communication transport section 18 transports the printed paper P from the circulation transport section 17 to the image inspection section 4 .

The image inspection unit 4 inspects the printed image on the paper P printed by the printing unit 3 . The image inspection section 4 includes a reading/conveying section 21 and two reading sections 22 .

The reading/conveying section 21 conveys the paper P conveyed by the communication conveying section 18 to the paper discharging section 5 .

The reading unit 22 reads the print image of the paper P conveyed by the reading/conveying unit 21 . The reading unit 22 is composed of a camera, a CIS (Contact Image Sensor), and the like. One reading unit 22 of the two reading units 22 is arranged above the reading/conveying unit 21 and reads the printed image on the upper surface of the paper P conveyed by the reading/conveying unit 21 . The other reading unit 22 is arranged below the reading/conveying unit 21 and reads the printed image on the lower surface of the sheet P conveyed by the reading/conveying unit 21 .

The paper ejection unit 5 ejects the paper P printed by the printing unit 3 . The paper discharge section 5 includes a paper discharge transport section (corresponding to paper discharge means) 31 and stacking sections 32A and 32B. Note that the alphabetical suffixes in the reference numerals of the stacking units 32A and 32B may be omitted to collectively describe them.

The paper discharge conveying unit 31 receives and conveys the paper P conveyed by the reading conveying unit 21, and selectively discharges the paper onto a paper discharge table 61 of the stacking unit 32A and a paper discharge table 61 of the stacking unit 32B, which will be described later. .

The paper ejection transport section 31 includes a common paper ejection path 41, an upstream paper ejection path 42, a downstream paper ejection path 43, a reversing path 44, a pair of introduction rollers 45, a pair of lifting rollers 46, and an upstream paper ejection transportation roller. A pair 47 , a plurality of downstream discharge conveying roller pairs 48 , a reversing roller pair 49 , and switching units 50 and 51 .

The common paper discharge path 41 is a common transport path for the paper P transported to the stacking portion 32A and the paper P transported to the stacking portion 32B.

The upstream paper ejection path 42 is connected to the downstream end of the common paper ejection path 41 in the paper P transportation direction, and is a transportation path for ejecting the paper P to the paper ejection tray 61 of the stacking section 32A.

The downstream paper ejection path 43 is a transport path connected to the downstream end of the common paper ejection path 41 and for ejecting the paper P to the paper ejection tray 61 of the stacking section 32B.

The reversing path 44 is a conveying path for switching back the paper P and reversing the front and back. The reversing path 44 branches off from the common paper discharge path 41 near the downstream side of the introduction roller pair 45 and merges with the common paper discharge path 41 on the upstream side of the rising roller pair 46 .

The introduction roller pair 45 introduces the sheet P conveyed by the reading/conveying section 21 to the sheet discharging section 5 . The introduction roller pair 45 is arranged at the upstream end of the common paper discharge path 41 .

The rising roller pair 46 conveys the paper P conveyed by the introduction roller pair 45 or the reversing roller pair 49 to the upstream discharge conveying roller pair 47 or the downstream discharge conveying roller pair 48 . The rising roller pair 46 is arranged along the common paper ejection path 41 downstream of the introduction roller pair 45 .

The upstream paper discharge conveying roller pair 47 conveys the paper P conveyed by the ascending roller pair 46 to the paper discharge table 61 of the stacking section 32A and discharges the paper. The upstream discharge transport roller pair 47 is arranged at the downstream end of the upstream discharge path 42 .

The downstream paper ejection transport roller pair 48 transports the paper P transported by the ascending roller pair 46 to the paper ejection tray 61 of the stacking unit 32B and ejects the paper. The downstream discharge conveying roller pair 48 is arranged along the downstream discharge path 43 .

The reversing roller pair 49 switches back the paper P conveyed by the introduction roller pair 45 and conveys it to the lifting roller pair 46 . The reversing roller pair 49 is arranged along the reversing path 44 .

The switching unit 50 switches the transport path of the paper P between the common paper discharge path 41 and the reversing path 44 in the vicinity of the downstream side of the introduction roller pair 45 .

The switching unit 51 switches the transport path of the paper P on the downstream side of the common paper ejection path 41 between the upstream paper ejection path 42 and the downstream paper ejection path 43 .

The stacking unit 32 is a portion where the printed paper P ejected by the paper ejection conveying unit 31 is stacked and held. Sheets P discharged by the upstream discharge conveying roller pair 47 are stacked on the stacking section 32A on the upstream side. The paper P discharged by the downstream paper discharge conveying roller pair 48 is stacked on the stacking section 32B on the downstream side. The stacking section 32 includes a sheet discharge tray 61 , an elevation drive section 62 , an end fence 63 , an offset fence 64 , an offset drive section 65 , an upper surface detection sensor 66 and a full sensor 67 .

The paper discharge table 61 is for stacking the printed paper P discharged by the paper discharge transport section 31 . The paper discharge table 61 of the stacking section 32</b>A on the flow side is arranged below the upstream paper discharge conveying roller pair 47 on the downstream side. The sheet discharge table 61 of the downstream stacking section 32B is arranged downstream of the downstream sheet discharge conveying roller pair 48 on the most downstream side. The paper discharge table 61 is configured to be able to move up and down so as to be lowered as the number of stacked sheets of paper P increases, so that a large number of sheets of paper P can be stacked. The paper discharge table 61 is configured to be able to be pulled out from the printing apparatus 1 by a carriage (not shown).

The elevation drive unit 62 raises and lowers the paper discharge tray 61 . The elevation drive unit 62 has a motor and the like.

The end fence 63 regulates the position of the downstream end (right end) of the paper P discharged onto the paper discharge table 61 .

The offset fence 64 regulates the position of the upstream end (left end) of the paper P discharged onto the paper discharge table 61 .

The offset drive unit 65 moves the end fence 63 and the offset fence 64 in the paper ejection direction (horizontal direction). The offset drive unit 65 has a motor and the like.

The upper surface detection sensor 66 detects the position of the upper surface of the paper P stacked on the paper discharge tray 61 (height position of the upper surface of the uppermost paper P). The upper surface detection sensor 66 is used to maintain the position of the upper surface of the paper P stacked on the paper discharge table 61 near the specified height position during the paper discharge operation. The upper surface detection sensor 66 has a light emitting portion 66a and a light receiving portion 66b.

The light-emitting portion 66a and the light-receiving portion 66b are arranged apart from each other in the left-right direction with the area where the paper P is stacked on the paper discharge table 61 interposed therebetween. The light-emitting portion 66a is arranged so that its optical axis is at a specified height position in the height direction, and emits light rightward toward the light-receiving portion 66b. The light receiving portion 66b receives the light from the light emitting portion 66a when there is no paper P between it and the light emitting portion 66a, and does not receive the light from the light emitting portion 66a when the paper P blocks the light from the light emitting portion 66a.

That is, the upper surface detection sensor 66 detects the paper P when the light receiving portion 66b does not receive light from the light emitting portion 66a. Here, the state in which the upper surface detection sensor 66 detects the paper P is turned on, and the state in which the paper P is not detected is turned off.

A full sensor 67 detects that the paper discharge table 61 is full of paper P. As shown in FIG. Specifically, the full sensor 67 detects the paper discharge tray 61 at the lower limit position, which is the height position when the maximum number of sheets P are stacked on the paper discharge tray 61 .

The operation panel 6 displays various input screens and the like, and accepts input operations by the user. The operation panel 6 includes a display section (not shown) having a liquid crystal display panel or the like, and an input section (not shown) having various operation keys, a touch panel, and the like.

The control section 7 controls the operation of each section of the printing apparatus 1 . The control unit 7 includes a CPU, RAM, ROM, hard disk, and the like.

In the printing operation, the control unit 7 discharges the normal paper onto the paper discharge tray 61 (corresponding to the first paper discharge tray) of the stacking section 32A, and the defective paper to the paper discharge tray 61 (corresponding to the second paper discharge tray) of the stacking section 32B. (corresponding to a table) to control the discharged paper conveying unit 31 to discharge the paper. Here, the normal paper is the paper P on which the printed image is normal. A defective sheet is a sheet P on which a printed image is defective (not normal). The controller 7 determines whether the printed image is normal or not based on the image data obtained by reading the printed image of the paper P with the reading unit 22 .

In addition, the control unit 7 offsets the stacking position in the left-right direction of the normal sheets ejected onto the sheet ejection tray 61 of the stacking unit 32A by the end fence 63 and the offset fence 64 when a defective printed image occurs. Control to partition by. The end fence 63 and the offset fence 64 of the stacking section 32A correspond to first partition means.

Further, the control unit 7 causes the printing unit 3 to print the missing page on the paper P at the portion where the normal paper discharged to the paper discharge table 61 of the stacking unit 32A is partitioned by the offset. Then, the control unit 7 controls the discharged paper conveying unit 31 so as to discharge the reprinted paper, which is the paper P on which the missing page is printed, to the paper discharge tray 61 of the stacking unit 32B. Here, the missing page is a missing page in the normal paper ejected onto the paper ejection tray 61 of the stacking unit 32A, and corresponds to a page printed on the defective paper P.

Next, operations of the printer 1 will be described.

FIG. 3 is a flow chart for explaining the operation of the printer 1. As shown in FIG. The processing of the flowchart in FIG. 3 is started when a print job is input to the printing apparatus 1 .

At step S1 in FIG. 3, the control section 7 starts the printing operation. Specifically, the control unit 7 sequentially feeds the paper P from the paper feeding unit 2 to the printing unit 3 and controls the printing unit 3 to print on the paper P. FIG.

The paper P printed by the printing unit 3 passes through the image inspection unit 4 and is sequentially conveyed to the paper discharge unit 5 . In the image inspection section 4, the reading section 22 reads the printed image of each sheet P that passes in sequence. The control unit 7 determines whether the print image is normal based on the image data obtained by the reading unit 22 reading the print image. For example, the control unit 7 determines that the printed image is defective when there is a misalignment of the printed image between the front side and the back side, smudges on the printed surface, page replacement, or the like.

A normal sheet having a normal printed image is discharged from the discharge unit 5 to the discharge tray 61 of the stacking unit 32A. When the paper P is discharged onto the paper discharge tray 61 of the stacking section 32A and the upper surface detection sensor 66 is turned on, the control section 7 lowers the paper discharge tray 61 until the upper surface detection sensor 66 is turned off.

Here, at the start of the printing operation, the switching unit 51 is set so that the paper discharge destination of the paper P is the paper discharge table 61 of the stacking unit 32A. That is, at the start of the printing operation, the switching section 51 is set to lead the paper P from the common paper discharge path 41 to the upstream paper discharge path 42 .

After the start of the printing operation, in step S2, the control section 7 determines whether or not there is a defect in the printed image based on the image data obtained by the reading section 22 reading the printed image of the paper P.

If it is determined that a defect has occurred in the printed image (step S2: YES), in step S3, the control section 7 controls the switching section 51 to switch the discharge destination of the paper P to the discharge tray 61 of the stacking section 32B. do. As a result, in the discharge section 5, the defective sheet is guided from the common discharge path 41 to the downstream discharge path 43 by the switching section 51, and discharged to the discharge table 61 of the stacking section 32B. In the stacking section 32B, similarly to the stacking section 32A, when the upper surface detection sensor 66 is turned on, the control section 7 lowers the sheet discharge table 61 until the upper surface detection sensor 66 is turned off.

Next, in step S4, the control section 7 controls the offset driving section 65 of the stacking section 32A to move the end fence 63 and the offset fence 64 in the horizontal direction by a predetermined distance. As a result, the stacking position in the left-right direction of the normal sheets to be discharged onto the sheet discharging tray 61 of the stacking section 32A after this is offset with respect to the sheet P discharged to the sheet discharging tray 61 until immediately before.

Next, in step S5, the control section 7 determines whether or not the printed image of the paper P has returned to normal based on the image data obtained by the reading section 22 reading the printed image of the paper P. If it is determined that the printed image has not returned to normal (step S5: NO), the control section 7 repeats step S5.

When it is determined that the printed image has returned to normal (step S5: YES), in step S6, the control section 7 controls the switching section 51 to switch the discharge destination of the paper P to the discharge tray 61 of the stacking section 32A. . As a result, the ejection of defective sheets onto the sheet ejection tray 61 of the stacking section 32B is completed, and the ejection of normal sheets onto the sheet ejection tray 61 of the stacking section 32A is restarted. After step S6, the controller 7 returns to step S2.

If it is determined in step S2 that no defect has occurred in the printed image (step S2: NO), in step S7, the control section 7 determines whether printing based on the print job has been completed.

If it is determined that printing based on the print job has been completed (step S7: YES), in step S8, the control section 7 determines whether or not a defect in the printed image has occurred during execution of the print job.

If it is determined that a defect in the printed image has occurred during execution of the print job (step S8: YES), in step S9, the control unit 7 sets the discharge destination of the paper P to the discharge tray 61 of the stacking unit 32B. The switching unit 51 is controlled to switch.

Next, in step S10, the control section 7 controls the paper feeding section 2 and the printing section 3 to print the partition information on the paper P. FIG. The partition paper, which is the paper P on which the partition information is printed, is ejected onto the paper ejection tray 61 of the stacking section 32B. As a result, the partition paper is placed on the defective paper stacked on the paper discharge tray 61 of the stacking section 32B.

Here, the partition information is information for distinguishing between the defective paper on the paper discharge tray 61 of the stacking section 32B and the reprinted paper, which is the paper P on which the missing page is printed. The partition information includes a message indicating that the reprinted paper is stacked above the partition paper on the paper discharge table 61 of the stacking section 32B, the page number of the missing page, and the like.

Next, in step S11, the control section 7 controls the paper feeding section 2 and the printing section 3 to print the missing pages at the locations where the normal sheets on the paper discharge table 61 of the stacking section 32A are separated by the offset. The reprinted paper, which is the paper P on which the missing page is printed, is discharged to the paper discharge tray 61 of the stacking section 32B. As a result, the reprinted paper is placed on the partition paper, and a series of operations is completed.

As described above, the paper P discharged to the paper discharge tray 61 of the stacking section 32B is partitioned by inserting the partition paper into the part where the paper P is partitioned (between the defective paper and the reprinted paper). A paper feeding unit 2 that conveys the paper P serving as the partition paper to the paper discharge table 61 of the stacking unit 32B and inserts it between the defective paper and the reprinted paper, the circulation conveying unit 17, the communication conveying unit 18, and the reading conveying unit 21. , and the discharged sheet conveying section 31 constitute a second partitioning means.

If it is determined in step S8 that no defect in the printed image occurred during execution of the print job (step S8: NO), the control section 7 skips steps S9 to S11 and ends the series of operations. .

When it is determined in step S7 that printing based on the print job has not been completed (step S7: NO), in step S12, the control unit 7 determines whether or not the paper discharge tray 61 of the stacking unit 32A is full. to decide. When the full sensor 67 of the stacking section 32A detects the paper discharge tray 61, the control section 7 determines that the paper discharge tray 61 of the stacking section 32A is full. If it is determined that the sheet discharge table 61 of the stacking section 32A is not full (step S12: NO), the control section 7 returns to step S2.

If it is determined that the paper discharge tray 61 of the stacking section 32A is full (step S12: YES), the control section 7 suspends printing based on the print job in step S13.

When the paper ejection tray 61 of the stacking section 32A is full and printing is interrupted, the user removes the paper P on the paper ejection tray 61 of the stacking section 32A, and then operates the operation panel 6 to issue an instruction to resume printing. do.

On the other hand, in step S<b>14 , the control unit 7 determines whether or not an instruction to resume printing has been given by operating the operation panel 6 . If it is determined that the restart of printing has not been instructed (step S14: NO), the control section 7 repeats step S14.

If it is determined that an instruction to resume printing has been issued (step S14: YES), the control unit 7 resumes printing based on the print job in step S15. After that, the controller 7 returns to step S2.

FIG. 4 shows an example of the stacking state of the sheets P on the stacking trays 61 of the stacking units 32A and 32B at the end of the printing operation as described above.

As shown in FIG. 4, normal sheets are stacked on the discharge tray 61 of the stacking section 32A. Normal sheets on the sheet discharge tray 61 of the stacking section 32A are offset in the stacking position in the left-right direction from the occurrence of the defective print image. Defective sheets and reprinted sheets are stacked on the sheet discharge table 61 of the stacking section 32B with a partition sheet sandwiched therebetween.

Note that even when it is determined that a print image defect has occurred in the printing operation, it may be a simple page missing and the print image itself on the printed paper P may be normal. In this case, no defective paper is generated, but the control unit 7 offsets the stacking position of the normal paper discharged to the paper discharge tray 61 of the stacking unit 32A when a missing page (defective print image) occurs. should be controlled accordingly.

As described above, in the printing apparatus 1, the control unit 7 discharges normal sheets to the sheet discharge tray 61 of the stacking section 32A and discharges defective sheets to the sheet discharge tray 61 of the stacking section 32B. It controls the transport section 31 . In addition, the control unit 7 offsets the stacking position in the left-right direction of the normal sheets ejected onto the sheet ejection tray 61 of the stacking unit 32A by the end fence 63 and the offset fence 64 when a defective printed image occurs. Control to partition by. Then, the control unit 7 causes the printing unit 3 to print the missing page on the paper P at the partitioned portion of the normal paper ejected to the paper ejection tray 61 of the stacking unit 32A, and prints the missing page on the paper P on which the missing page is printed. Controls the discharged paper conveying unit 31 to discharge a certain reprinted paper to the paper discharging tray 61 of the stacking unit 32B.

As a result, the discharge tray 61 is the only discharge destination from which the user takes out the normal sheets, and there is no need to separate the normal sheets from the other sheets P. In addition, since the normal sheets on the discharge table 61 of the stacking section 32A are separated at the occurrence of the defective print image, the user can easily determine the position to insert the reprinted sheets into the normal sheets. Therefore, it is possible to improve the efficiency of the work for removing the printed matter from the discharge destination and obtaining the normal printed matter.

Further, in the printing apparatus 1, the defective paper and the reprinted paper discharged to the paper discharge table 61 of the stacking section 32B are separated by the partition paper. As a result, the user can easily obtain the reprinted paper, so that the efficiency of the work of inserting the reprinted paper into the normal paper can be improved.

Further, in the printing apparatus 1, partition information is printed on partition paper. As a result, by providing the partition information to the user, it is possible to improve the efficiency of the user's task of obtaining reprinted paper, inserting reprinted paper into normal paper, and the like.

Note that the printing of the partition information on the partition paper may be omitted.

Instead of inserting the partition paper, the end fence 63 and the offset fence 64 of the stacking unit 32B are used to offset the placement position of the reprinted paper with respect to the defective paper, thereby partitioning the defective paper from the reprinted paper. may In this case, the end fence 63 and the offset fence 64 of the stacking section 32B correspond to the second partition means.

In addition, normal sheets may be partitioned by inserting a partition sheet instead of the offset on the sheet discharge table 61 of the stacking section 32A.

In the embodiment described above, even if the paper discharge tray 61 of the stacking unit 32A becomes full during the print job, the missing pages are printed after the print job is completed. However, the missing pages may be printed when the print job is interrupted when the paper discharge table 61 of the stacking unit 32A is full. In this case, the user may be instructed to remove defective sheets and reprinted sheets from the sheet ejection tray 61 of the stacking section 32B when removing normal sheets from the sheet ejection tray 61 of the full stacking section 32A. It should be noted that the reprinted paper before resuming the print job and the defective paper after resuming the print job may be partitioned by inserting a partition paper or offsetting.

Alternatively, normal sheets may be discharged onto the sheet discharge tray 61 of the stacking section 32B, and defective sheets and reprinted sheets may be discharged onto the sheet discharge tray 61 of the stacking section 32A.

Alternatively, the printing apparatus 1 may be provided with three or more paper ejection trays 61, and a plurality of paper ejection trays 61 (first paper ejection trays) may be used as paper ejection destinations for normal paper. Even in this case, by dividing the normal paper when a print image defect occurs, it is possible to reduce the number of output destinations compared to the case where paper is output to a different output destination each time a print image defect occurs. can. Therefore, it is possible to improve the efficiency of the work for removing the printed matter from the discharge destination and obtaining the normal printed matter.

When the printing apparatus 1 has three or more paper ejection trays 61, the paper ejection trays 61 different from the paper ejection trays 61 to which the normal paper is ejected and the paper ejection trays 61 to which the defective paper are ejected can be used. The reprinted paper may be discharged.

The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the gist of the present invention. Also, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments.

[Appendix]
This application discloses the following inventions.

(Appendix 1)
printing means for printing on paper;
a plurality of paper ejection trays including a first paper ejection tray and a second paper ejection tray on which sheets printed by the printing means are respectively ejected;
a paper ejection means for selectively ejecting paper onto the plurality of paper ejection trays;
a first partitioning means for partitioning the sheets ejected onto the first paper ejection tray;
The paper ejection means is controlled so that normal paper having a normal printed image is ejected to the first paper ejection tray, and defective paper having a defective printed image is ejected to the second paper ejection tray. and a control means for
The control means controls the normal paper discharged to the first paper discharge tray to be partitioned by the first partitioning means when a defect occurs in the printed image. A printing apparatus characterized by controlling said paper discharge means to print a page on paper by said printing means and to discharge said paper on which said missing page is printed to a paper discharge tray other than said first paper discharge tray. .

(Appendix 2)
Further comprising a second partitioning means for partitioning the paper discharged to the second paper discharge table,
The control means controls the paper discharge means to discharge the paper on which the missing page is printed to the second paper discharge tray, and controls the defective paper and the defective paper discharged to the second paper discharge tray. The printing apparatus according to appendix 1, wherein control is performed so that the sheet on which the missing page is printed is partitioned by the second partitioning means.

(Appendix 3)
The second partition means inserts a partition paper into a portion for partitioning the paper discharged to the second paper discharge tray,
The control means causes the printing means to print information for identifying the defective paper and the paper on which the missing page is printed on the paper, and partitions the paper on which the information is printed into the second partition means. 2. The printing apparatus according to appendix 2, wherein the printing apparatus is used as paper.

REFERENCE SIGNS LIST 1 printing device 2 paper feeding section 3 printing section 4 image inspection section 5 paper discharge section 6 operation panel 7 control section 31 paper discharge transport section 32, 32A, 32B stacking section 61 paper discharge table 62 elevation drive section 63 end fence 64 offset fence 65 offset drive

Claims (3)

printing means for printing on paper;
a plurality of paper ejection trays including a first paper ejection tray and a second paper ejection tray on which sheets printed by the printing means are respectively ejected;
a paper ejection means for selectively ejecting paper onto the plurality of paper ejection trays;
a first partitioning means for partitioning the sheets discharged onto the first sheet discharge tray by offsetting the stacking position of the sheets discharged onto the first sheet discharge tray;
The paper ejection means is controlled so that normal paper having a normal printed image is ejected to the first paper ejection tray, and defective paper having a defective printed image is ejected to the second paper ejection tray. and a control means for
The control means controls the normal paper discharged to the first paper discharge tray to be partitioned by the first partitioning means when a defect occurs in the printed image. A printing apparatus characterized by controlling said paper discharge means to print a page on paper by said printing means and to discharge said paper on which said missing page is printed to a paper discharge tray other than said first paper discharge tray. . printing means for printing on paper;
a plurality of paper ejection trays including a first paper ejection tray and a second paper ejection tray on which sheets printed by the printing means are respectively ejected;
a paper ejection means for selectively ejecting paper onto the plurality of paper ejection trays;
a first partitioning means for partitioning the sheets ejected onto the first paper ejection tray;
a second partitioning means for partitioning the sheets ejected onto the second paper ejection tray;
The paper ejection means is controlled so that normal paper having a normal printed image is ejected to the first paper ejection tray, and defective paper having a defective printed image is ejected to the second paper ejection tray. and a control means for
The control means controls the normal paper discharged to the first paper discharge tray to be partitioned by the first partitioning means when a defect occurs in the printed image. printing a page on paper by the printing means, controlling the paper discharging means to discharge the paper on which the missing page is printed to the second paper discharging tray, and discharging the paper to the second paper discharging tray; and a printing apparatus, wherein the second partition means separates the defective paper and the paper on which the missing page is printed. The second partition means inserts a partition paper into a portion for partitioning the paper discharged to the second paper discharge tray,
The control means causes the printing means to print information for identifying the defective paper and the paper on which the missing page is printed on the paper, and partitions the paper on which the information is printed into the second partition means. 3. The printing apparatus according to claim 2, wherein the printing apparatus is used as paper.