JP2020146973A - Printing system - Google Patents

Abstract

To suitably align papers while reducing transfer contamination.SOLUTION: A printing system executes first printing for one surface of a sheet on the basis of a job including first image data and second image data corresponding to a front and a rear of the sheet, and thereafter, executes second printing for the other surface of the sheet for which the first printing has been performed. The printing system comprises: a calculation part 53 calculates each printing rate of the first image data and the second image data; and an image determination part 54 which determines the first image data and the second image data as image data, which is used at a sheet unit in any one of the first printing by a first printer 10 and the second printing by a second printer 30, on the basis of the printing rate calculated by the calculation part 53.SELECTED DRAWING: Figure 2

Description

The present invention relates to a printing system that appropriately aligns paper while reducing transfer stains according to the printing rate of an image.

Conventionally, it has a circulation transport path including a paper reversal path, prints on one side of the paper fed from the paper feed table, and the paper printed on this one side is conveyed by the paper reversal path. There is a double-sided printing device that performs double-sided printing by inverting the front and back and printing on the other side.

In such a double-sided printing device, the paper fed from the paper feed tray and the paper whose front and back sides are reversed by the paper reversal path are alternately conveyed, so that the printing time is longer than in the case of single-sided printing. Was there.

Therefore, Patent Document 1 describes a first and second inkjet heads that form an image on paper, and a main transport path that conveys the paper so that images are formed by the first and second inkjet heads. A technique relating to an inkjet recording apparatus is described in which a first full-color printing is performed on one side by a first inkjet head and a second full-color printing is performed on the opposite side by a second inkjet head.

Japanese Unexamined Patent Publication No. 2011-51342

However, in the technique described in Patent Document 1, if the amount of ink ejected when forming an image with the first inkjet head is large (the printing rate is high), the transfer roller is used before the paper reaches the second inkjet head. Transfer stains may occur. In addition, the paper may expand and the paper may be deformed, and the deformed paper may collide with the second inkjet head or a paper jam may occur, resulting in poor transport.

On the other hand, if the amount of ink ejected when forming an image with the second inkjet head is large, the paper is ejected before it dries, which may result in poor paper ejection alignment.

Therefore, for users who prioritize print finish quality, they want to reduce transfer stains as much as possible, and for users who do not care much about print finish quality, they want to align paper discharge more appropriately than transfer stains. ..

The present invention has been made in view of the above problems, and an object of the present invention is to provide a printing system that appropriately aligns paper while reducing transfer stains according to the printing rate of an image.

In order to achieve the above object, the features of the printing system according to the present invention are
After performing the first printing process on one side of the paper based on the job containing the first image data and the second image data corresponding to the front and back sides of the paper, the other side of the first printed paper This is a printing system that executes the second printing process.
A calculation means for calculating the print rate of each of the first image data and the second image data, and
An image in which the first image data and the second image data are used as image data to be used in either the first printing process or the second printing process on a paper-by-paper basis based on the print rate calculated by the calculation means. Determining means and
A printing system characterized by being equipped with.
It is to have.

According to the features of the printing system according to the present invention, it is possible to appropriately align paper while reducing transfer stains.

It is a schematic block diagram of the printing system which concerns on 1st Embodiment of this invention. It is a block diagram which shows the function of the printing system which concerns on 1st Embodiment of this invention. It is a figure which showed an example of the setting table stored in the storage part provided in the printing system which concerns on 1st Embodiment of this invention. It is a flowchart which showed the processing content in the printing system which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the printing system which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the printing system which concerns on the modification of 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent parts and components are designated by the same or equivalent reference numerals throughout the drawings. However, it should be noted that the drawings are schematic and differ from the actual ones. In addition, there are parts in which the relations and ratios of the dimensions of the drawings are different from each other.

Further, the embodiments shown below exemplify an apparatus or the like for embodying the technical idea of the present invention, and the technical idea of the present invention describes the arrangement of each component and the like as follows. It is not specific to. The technical idea of the present invention can be modified in various ways within the scope of claims.

[Structure of the first embodiment]
First, the configuration of the tandem printing system 1 according to the first embodiment of the present invention will be described. The tandem printing system 1 receives a job transmitted from a terminal device such as a PC, and prints an image on paper as a printing medium based on the received job.

Further, the tandem printing system 1 according to the first embodiment of the present invention is a printing system having two printing devices arranged in series along a paper transport path.

FIG. 1 is a schematic configuration diagram of a tandem printing system 1 according to the first embodiment of the present invention. As shown in FIG. 1, the tandem printing system 1 according to the first embodiment includes a first printing device 10, an intermediate device 20, a second printing device 30, an emission reversing device 40, and an integrated control device 50. And.

Further, in the present embodiment, the first printing process and the second printing process are the same printing process, and the first printing device 10 uses CMYK color ink on one side of the paper to perform the first printing process. The second printing device 30 executes the second printing process using the CMYK color ink on the other side of the paper printed by the first printing device 10.

Further, in FIG. 1, the route shown by the thick line is the transport route through which the paper is transported. The transfer path includes the transfer path R1 in the first printing device 10, the transfer path R2 in the intermediate device 20, the transfer path R3 in the second printing device 30, and the transfer path R4 in the discharge reversing device 40. The transport path R1 in the first printing device 10 is a path for transporting to the second printing device 30 via the intermediate device 20, and is switched to the transport path R1'when printing is performed only by the first printing device 10. The paper is discharged to the paper ejection unit 11P. Further, the transport path R2 in the intermediate device 20 is a reversing path for reversing the paper, and when the reversing of the paper is unnecessary, the transfer path R2 is switched to the straight transfer path R2'for transporting the paper without reversing. Further, the transfer path R4 in the discharge reversing device 40 is a reversing path for reversing the paper, and when the reversing of the paper is unnecessary, the transfer path R4 is switched to the straight transfer path R4'for transporting the paper without reversing the paper, and the paper is discharged. The paper is discharged to the table 49.

As shown in FIG. 1, the first printing apparatus 10 includes a transport unit 12, a printing unit 13, and an apparatus control unit 15.

The transport unit 12 includes an external paper feed roller 12a and a resist roller 12b. The external paper feed roller 12a conveys the paper P loaded on the paper feed table 10P toward the resist roller 12b. The resist roller 12b temporarily stops the paper P conveyed from the external paper feed roller 12a, and then sends the paper P to the printing unit 13.

The printing unit 13 prints an image on the paper P in color while carrying the paper P. The printing unit 13 includes an ink head unit 13a, a belt transport unit 13b, and a paper ejection roller 13c.

The ink head portion 13a is arranged above the belt transport portion 13b, and has a plurality of line-type inkjet heads in which a plurality of nozzles are arranged in a direction substantially orthogonal to the transport direction of the paper P. The ink head unit 13a ejects ink from the inkjet head onto the paper P conveyed by the belt conveying unit 13b to print an image. In the present embodiment, the ink head portion 13a is composed of K color ink (black color ink), C color ink (cyan color ink), M color ink (magenta color ink), and Y color ink (yellow color ink). It is equipped with an ink jet head capable of ejecting each. Of course, it is also possible to perform monochrome printing using only K color ink (black color ink).

The belt transport unit 13b sucks and holds the paper P conveyed from the resist roller 12b on the belt and conveys it. The belt transport portion 13b is arranged on the downstream side of the resist roller 12b and below the ink head portion 13a.

The paper ejection roller 13c ejects the paper P printed by the ink head portion 13a to the intermediate device 20.

The device control unit 15 controls various functions in the first printing device 10. The device control unit 15 controls the transport unit 12 and the printing unit 13 to print an image on the paper P.

The intermediate device 20 is arranged on the downstream side in the transport direction of the first printing device 10. The intermediate device 20 conveys the paper P carried out from the first printing device 10 to the second printing device 30. The intermediate device 20 includes a transport unit 22 and a device control unit 25.

The transport unit 22 includes transport rollers 22a, 22b, and 22c, and the transport rollers 22a, 22b, and 22c transport the paper P along the transport path R2 or the straight transport path R2'.

The device control unit 25 controls various functions of the intermediate device 20. By controlling the transport unit 22, the device control unit 25 transports the paper P while switching to either the transport path R2 or the straight transport path R2'.

The second printing device 30 is arranged on the downstream side in the transport direction of the intermediate device 20. The second printing device 30 includes a transport unit 32, a printing unit 33, and a device control unit 35.

The transport unit 32 includes a transport roller 32a, and transports the paper P carried out from the intermediate device 20 to the printing unit 33.

The printing unit 33 prints an image on the paper P while carrying the paper P. The printing unit 33 includes an ink head unit 33a, a belt transport unit 33b, and a paper ejection roller 33c. Since the configurations of the ink head portion 33a and the belt transport portion 33b are the same as the configurations of the ink head portion 13a and the belt transport portion 13b of the first printing apparatus 10 described above, detailed description thereof will be omitted. ..

The paper ejection roller 33c ejects the paper P printed by the ink head portion 33a to the ejection reversing device 40.

The device control unit 35 controls various functions in the second printing device 30. The device control unit 35 controls the transport unit 32 and the printing unit 33 to print an image on the paper P.

The discharge reversing device 40 is arranged on the downstream side in the transport direction of the second printing device 30. The ejection reversing device 40 conveys the paper P carried out from the second printing apparatus 30 to the ejection table 49. The discharge reversing device 40 includes a transport unit 42 and a device control unit 45.

The transport unit 42 includes transport rollers 42a, 42b, and 42c, and the transport rollers 42a, 42b, and 42c transport the paper P along the transport path R4 or the straight transport path R4'.

The device control unit 45 controls various functions of the discharge reversing device 40. By controlling the transport unit 42, the device control unit 45 transports the paper P while switching to either the transport path R4 or the straight transport path R4'.

The integrated control device 50 controls various functions in the tandem printing system 1. Further, the integrated control device 50 controls the first printing device 10, the intermediate device 20, the second printing device 30, and the discharge reversing device 40 so as to execute the printing process based on the job.

(Configuration of integrated control device 50)
Next, the configuration of the integrated control device 50 will be specifically described. FIG. 2 is a block diagram showing the functions of the tandem printing system 1.

As shown in FIG. 2, the integrated control device 50 includes a job reception unit 51, a reception unit 52, a calculation unit 53, an image determination unit 54, a storage unit 56, and a communication unit 57.

The job receiving unit 51 transmits / receives information to / from the terminal device 100. Specifically, the job receiving unit 51 receives a job from the terminal device 100 used by the user. The communication here includes, for example, an intranet (internal network), a home network, or the like, and may be either wired communication or wireless communication.

The job to be received includes the first image data and the second image data corresponding to the front and back sides of the paper P. That is, when the first image data is used for the first printing process by the first printing device 10, the second image data is used for the second printing process by the second printing device 30. On the contrary, when the first image data is used for the second printing process by the second printing device 30, the second image data is used for the first printing process by the first printing device 10.

The reception unit 52 receives a selection signal for selecting either the output alignment priority mode or the quality priority mode based on the user operation. Here, the paper ejection alignment priority mode is a mode in which the printing processing is executed and the paper ejection alignment of the paper P discharged on the paper ejection table 49 is prioritized. The quality priority mode is a mode in which priority is given to print quality.

The selection signal of this mode may be set by being input from an input device such as a keyboard connected to the overall control device 50 (not shown), or the selection signal may be stored in the header of the job. You may.

The calculation unit 53 calculates the print rate of the first image data based on the first image data included in the job, and calculates the print rate of the second image data based on the second image data.

Based on the print rate calculated by the calculation unit 53, the image determination unit 54 prints the first image data and the second image data on a paper-by-paper basis by the first printing process by the first printing device 10 or by the second printing device 30. 2 Determined as image data to be used in any of the printing processes.

Specifically, when the image determination unit 54 receives the selection signal for selecting the output alignment priority mode by the reception unit 52, the image determination unit 54 is among the first image data and the second image data based on the setting table described later. Image data having a high print rate is determined as image data to be used in the first printing process by the first printing apparatus 10. On the other hand, when the image determination unit 54 receives the selection signal for selecting the quality priority mode by the reception unit 52, the image data having a high print rate among the first image data and the second image data is based on the setting table. Is determined as the image data used for the second printing process by the second printing device 30.

The storage unit 56 stores the received job as a waiting job until the print process is executed. When the waiting job is executed, the image data (first image data and second image data) to be printed by the first printing device 10 and the second printing device 30 are extracted, and the image determination unit is extracted from the communication unit 57. It is transmitted to the printing device (first printing device 10 or second printing device 30) determined by 54. When the image data is transmitted, the waiting job is regarded as a running job, and when printing is completed, the running job is deleted from the storage unit 56.

In addition, the storage unit 56 stores the setting table.

FIG. 3 is a diagram showing an example of a setting table stored in the storage unit 56.

As shown in FIG. 3, the setting table has a "mode setting" indicating whether the output alignment priority mode or the quality priority mode is used, and whether the paper P is output face-up to the output table 49 or face-down. The "emission direction" indicating whether to print, the "printing rate" indicating which of the odd-sized pages and the even-numbered pages has the higher printing rate, and the "printing rate" indicating the pages to be printed by the first printing apparatus 10 among the odd-sized pages or the even-numbered pages. The "first printing device", the "second printing device" indicating the pages to be printed by the second printing device 30 among the odd pages or the even pages, and the "emission reversal" indicating whether or not the discharge reversing device 40 is necessary. "Is remembered in association with.

For example, in this setting table, when the "paper ejection priority mode" is selected and the paper ejection orientation is set to "face down", the print rate of the first page (odd page) is set to the second page (odd page). If it is higher than the print rate of (even pages), the image data of the first page is used for the first printing process by the first printing device 10, and the image data of the second page is used for the second printing process by the second printing device 30. It shows that it can be printed. In addition, since the paper ejection direction is set to "face down", it indicates that the ejection reversal is "not reversed".

FIG. 4 is a flowchart showing the processing contents in the printing system 1 according to the first embodiment of the present invention.

As shown in FIG. 4, when the job receiving unit 51 receives a job from the terminal device 100 (step S101; YES), the calculation unit 53 acquires the user setting and the paper ejection direction information from the header of the received job. (Step S103).

Further, the calculation unit 53 calculates the print rate of each page corresponding to the front and back sides of the paper based on the image data included in the job (step S105). Specifically, the calculation unit 53 calculates the print rate of the first image data included in the job and also calculates the print rate of the second image data.

Next, the image determination unit 54 is based on the setting table stored in the storage unit 56, the print rate calculated by the calculation unit 53, the user settings extracted from the header of the received job, and the information for paper ejection. The first image data and the second image data are determined as image data to be used in either the first printing process by the first printing device 10 or the second printing process by the second printing device 30 for each paper (step S107). ..

Then, the image determination unit 54 sets the presence / absence of ejection reversal (step S109), and the device control unit 15, the device control unit 25, the device control unit 35, and the device control unit 45 print based on the determined image data. The process is executed (step S111).

For example, suppose that the setting mode is set to "paper ejection priority mode" and the paper ejection direction is set to "face down". When the print rate of the first page (odd page) is higher than the print rate of the second page (even page), the image data of the first page is used for the printing process by the first printing apparatus 10, and the second page is printed. The image data is determined as image data used in the printing process by the second printing apparatus 30.

When the "paper ejection priority mode" is selected as the setting mode, it can be inferred that the user does not care much about the print finish quality, but wants to more appropriately eject the paper than the transfer stain.

Therefore, the first printing apparatus 10 performs the first printing process on one side of the paper P based on the image data of the first page having a high printing rate, and the second printing process is performed based on the image data of the second page having a low printing rate. By performing the second printing process on the other surface of the paper P in the printing apparatus 30, a sufficient drying time can be secured until the ink on the first page, which has a large amount of ejected ink, is discharged. Therefore, since the paper P is sufficiently dried when the paper is ejected, the paper P is placed on the paper ejection table 49 in a state where the paper P is properly aligned.

At this time, since the paper ejection direction is set to "face down", the paper is ejected to the paper ejection table 49 without being ejected and inverted by the ejection reversing device 40.

When the print rate of the third page (odd page) is lower than the print rate of the fourth page (even page), the image data of the third page is used for the second printing process by the second printing apparatus 30, and 4 The image data of the page is determined as the image data used in the first printing process by the first printing apparatus 10.

In this case as well, similarly, the first printing apparatus 10 performs the first printing process on one side of the paper P based on the image data of the fourth page having a high printing rate, and the image of the third page having a low printing rate. Based on the data, the second printing apparatus 30 performs the second printing process on the other side of the paper P. As a result, a sufficient drying time can be secured until the ink on the fourth page, which has a large amount of ejected ink, is ejected. Therefore, the paper P is placed on the paper ejection table 49 in a state where the paper is properly aligned. Paper P is placed.

At this time, since the paper ejection direction is set to "face down", in order to eject the third page downward, the ejection is reversed by the ejection reversing device 40 and then the paper is ejected to the paper ejection table 49.

On the other hand, it is assumed that the setting mode is set to "quality priority mode" and the paper ejection direction is set to "face up". If "face up" is set, the pages will be determined in reverse order. Here, it is assumed that the job has all four pages.

When the print rate of the third page (odd page) is higher than the print rate of the fourth page (even page), the image data of the third page is used for the second printing process by the second printing apparatus 30, and 4 The image data of the page is determined as the image data used in the first printing process by the first printing apparatus 10.

When the "quality priority mode" is selected as the setting mode, the user does not care much about the ejection alignment of the ejected paper P, but it can be inferred that there is a desire to print with high finish quality.

Therefore, the first printing apparatus 10 performs the first printing process on one side of the paper P based on the image data of the fourth page having a low printing rate, and the second printing process is performed based on the image data of the third page having a high printing rate. The printing apparatus 30 performs a second printing process on the other side of the paper P. Since the amount of ink ejected on the fourth page is small, transfer stains can be reduced as much as possible by printing the fourth page first.

At this time, since the paper ejection direction is set to "face-up", the paper is ejected to the paper ejection table 49 without being ejected and inverted by the ejection reversing device 40.

When the print rate of the first page (odd page) is lower than the print rate of the second page (even page), the image data of the first page is used for the first print process by the first printing device 10, and 2 The image data of the page is determined as the image data used in the second printing process by the second printing apparatus 30.

In this case as well, similarly, the first printing apparatus 10 performs the first printing process on one side of the paper P based on the image data of the first page having a low printing rate, and the image of the second page having a high printing rate. Based on the data, the second printing apparatus 30 performs the second printing process on the other side of the paper P. Since the amount of ink ejected on the first page is small, transfer stains can be reduced as much as possible by printing the first page first.

At this time, since the paper ejection direction is set to "face-up", in order to eject the first page upward, the ejection is inverted by the ejection reversing device 40 and then ejected to the paper ejection table 49.

As described above, according to the printing system 1 according to the first embodiment of the present invention, the image determination unit 54 performs the first image data and the second image data in units of paper based on the printing rate calculated by the calculation unit 53. The image data is determined as image data to be used in either the first printing process by the first printing device 10 or the second printing process by the second printing device 30.

As a result, the first image data and the second image data can be printed by the first printing device 10 or the second printing device 30 in units of paper according to the printing rate of the image, which is appropriate while reducing transfer stains. Paper alignment can be performed.

More specifically, when the image determination unit 54 receives the selection signal for selecting the output alignment priority mode by the reception unit 52, the image determination unit 54 of the first image data and the second image data based on the setting table described later. Among them, the image data having a high printing rate is determined as the image data to be printed by the first printing apparatus 10. On the other hand, when the image determination unit 54 receives the selection signal for selecting the quality priority mode by the reception unit 52, the image data having a high print rate among the first image data and the second image data is based on the setting table. Is determined as image data to be printed by the second printing device 30.

Therefore, the first image data and the second image data can be printed by the first printing device 10 or the second printing device 30 on a paper-by-paper basis based on the user settings of the output alignment priority mode or the quality priority mode. As a result, the paper alignment can be performed appropriately while reducing the transfer stains according to the user's preference of reducing the transfer stains as much as possible and giving priority to the print finish quality or giving priority to the appropriate paper ejection alignment. Can be done.

[Structure of the second embodiment]
In the first embodiment of the present invention, a tandem printing system 1 in which two printing devices that perform predetermined printing processes on paper are arranged in series along a paper transport path has been described as an example. , Not limited to this.

In the second embodiment of the present invention, a printing system 1A in which two printing units that perform predetermined printing processes on paper are arranged in series along a paper transport path will be described as an example.

FIG. 5 is a schematic configuration diagram of the printing system 1A according to the second embodiment of the present invention.

As shown in FIG. 5, the printing system 1A according to the second embodiment includes a printing device 60, an ejection reversing device 40, and a integrated control device 50. Of these, the discharge reversing device 40 and the integrated control device 50 are the same as the configuration of the printing system 1 according to the first embodiment of the present invention, and thus the description thereof will be omitted.

The printing device 60 includes a transport unit 12, a printing unit 13, an apparatus control unit 15, and a printing unit 33. The paper P on which one side is printed by the first printing process of the printing unit 13 is inverted while being conveyed along the conveying path R3 and conveyed to the printing unit 33. The other side of the conveyed paper P is printed by the second printing process of the printing unit 33, and the conveyed paper P is conveyed to the discharge reversing device 40. Here, the configuration of the transport unit 12, the printing unit 13, the device control unit 15, and the printing unit 33 included in the printing device 60 is the first printing device of the printing system 1 according to the first embodiment of the present invention, respectively. Since the configuration is the same as that of the transport unit 12, the printing unit 13, the device control unit 15, and the printing unit 33 included in the 10 and the second printing device 30, the description thereof will be omitted.

Also in the second embodiment of the present invention, as in the first embodiment of the present invention, when the job receiving unit 51 of the integrated control device 50 receives the job, the calculation unit 53 causes the first image data included in the job. The print rate of the first image data is calculated based on the above, the print rate of the second image data is calculated based on the second image data, and the image determination unit 54 is based on the print rate calculated by the calculation unit 53. Then, the first image data and the second image data are determined as images to be used in either the first printing process by the printing unit 13 or the second printing processing by the printing unit 33 for each paper.

As a result, the first image data and the second image data can be printed by the first printing unit 13 or the second printing unit 33 on a paper-by-paper basis according to the printing rate of the image, which is appropriate while reducing transfer stains. Paper alignment can be performed.

In the second embodiment of the present invention, the printing system 1A in which two printing units for performing a predetermined printing process on the paper are arranged in series along the paper transport path has been described as an example. Not limited to this, one printing unit may execute the printing process twice.

FIG. 6 is a schematic configuration diagram of a printing system 1B according to a modified example of the second embodiment of the present invention.

As shown in FIG. 6, the printing system 1B according to the modified example of the second embodiment includes the printing device 70, the discharge reversing device 40, and the integrated control device 50. Of these, the discharge reversing device 40 and the integrated control device 50 are the same as the configuration of the printing system 1 according to the first embodiment of the present invention, and thus the description thereof will be omitted.

The printing device 70 includes a transport unit 12, a printing unit 13, and a device control unit 15. The paper P on which one side is printed by the first printing process of the printing unit 13 is conveyed on the conveying path R1', the front and back sides are reversed by the inversion section 16, and then conveyed on the conveying path R1'' again. It is supplied to the printing unit 13. The other side of the conveyed paper P is printed by the second printing process by the printing unit 13, and the conveyed paper P is conveyed to the discharge reversing device 40. Here, the configuration of the transport unit 12 included in the printing device 70, the printing unit 13, and the device control unit 15 is the transport unit included in the first printing device 10 of the printing system 1 according to the first embodiment of the present invention. Since the configuration is the same as that of 12, the printing unit 13, and the device control unit 15, the description thereof will be omitted.

Also in the modified example of the second embodiment of the present invention, when the job receiving unit 51 of the integrated control device 50 receives the job, the calculation unit 53 is included in the job as in the first embodiment of the present invention. The print rate of the first image data is calculated based on the 1 image data, the print rate of the second image data is calculated based on the second image data, and the image determination unit 54 calculates the print by the calculation unit 53. Based on the rate, the first image data and the second image data are determined as image data to be used in either the first printing process or the second printing process by the printing unit 13 for each paper.

As a result, the first image data and the second image data are printed on a paper-by-paper basis in the first printing process, which is the first printing process, or in the second printing process, which is the second printing process, according to the printing rate of the image. Therefore, it is possible to appropriately align the paper while reducing transfer stains.

The first printing device 10, the second printing device 30, the printing device 60, and the printing device 70 have been described as an inkjet printing device including an inkjet head, but the printing unit is not limited to this, and for example, a stencil printing device. It may be another type of printing apparatus such as.

(Additional note)
This application discloses the following inventions.

(Appendix 1)
After performing the first printing process on one side of the paper based on the job containing the first image data and the second image data corresponding to the front and back sides of the paper, the other side of the first printed paper This is a printing system that executes the second printing process.
A calculation means for calculating the print rate of each of the first image data and the second image data, and
An image in which the first image data and the second image data are used as image data to be used in either the first printing process or the second printing process on a paper-by-paper basis based on the print rate calculated by the calculation means. Determining means and
A printing system characterized by being equipped with.

As a result, the first image data and the second image data can be used in either the first printing process or the second printing process in units of paper according to the printing rate of the image, so that the image data can be used more appropriately. Since it can be associated with the printing process in order, it is possible to appropriately align the paper while reducing transfer stains.

(Appendix 2)
Further, a reception means for receiving a selection signal for selecting either the output alignment priority of the paper on which the second printing process has been executed is prioritized or the quality priority prioritizing the print finish quality for the job. Prepare,
The image determining means
When the selection signal for selecting the output alignment priority is received by the receiving means, the image data having a high printing rate among the first image data and the second image data is used in the first printing process. The printing system according to Appendix 1, wherein the printing system is determined as.

Thereby, based on the user setting of the output alignment priority mode, the first image data and the second image data can be printed by using the first image data and the second image data as the image data used in the first printing process or the second printing process for each paper. As a result, it is possible to appropriately align the paper while reducing the transfer stains according to the preference of the user who wants to give priority to appropriately aligning the discharged paper.

(Appendix 3)
The image determining means
When the selection signal for selecting the quality priority is received by the receiving means, the image data having a high printing rate among the first image data and the second image data is determined as the image data to be used in the second printing process. The printing system according to Appendix 2, which is characterized by the above.

As a result, the first image data and the second image data are used as the image data used in the first printing process or the second printing process for printing on a paper-by-paper basis based on the user settings of the output alignment priority mode or the quality priority mode. be able to. As a result, the paper alignment can be performed appropriately while reducing the transfer stains according to the user's preference of reducing the transfer stains as much as possible and giving priority to the print finish quality or giving priority to the appropriate paper ejection alignment. Can be done.

1,1A, 1B Printing system 10 1st printing device 10P Paper feed stand 11P Paper ejection unit 12 Conveying unit 13 1st printing unit (printing unit)
13a Ink head unit 13b Belt transport unit 13c Paper ejection roller 15 Device control section 16 Inversion section 20 Intermediate device 22 Transport section 25 Device control section 30 Second printing device 32 Transport section 33 Second printing section (printing section)
33a Ink head unit 33b Belt transport unit 33c Paper discharge roller 35 Device control unit 40 Discharge reversing device 42 Transport unit 45 Device control unit 49 Paper discharge stand 50 General control device 51 Job reception unit 52 Reception unit 53 Calculation unit 54 Image determination unit 56 Storage unit 57 Communication unit 60, 70 Printing device 100 Terminal device

Claims (3)

After performing the first printing process on one side of the paper based on the job containing the first image data and the second image data corresponding to the front and back sides of the paper, the other side of the first printed paper This is a printing system that executes the second printing process.
A calculation means for calculating the print rate of each of the first image data and the second image data, and
An image in which the first image data and the second image data are used as image data to be used in either the first printing process or the second printing process on a paper-by-paper basis based on the print rate calculated by the calculation means. Determining means and
A printing system characterized by being equipped with. Further, a reception means for receiving a selection signal for selecting either the output alignment priority of the paper on which the second printing process has been executed is prioritized or the quality priority prioritizing the print finish quality for the job. Prepare,
The image determining means
When the selection signal for selecting the output alignment priority is received by the receiving means, the image data having a high printing rate among the first image data and the second image data is used in the first printing process. The printing system according to claim 1, wherein the printing system is determined as. The image determining means
When the selection signal for selecting the quality priority is received by the receiving means, the image data having a high printing rate among the first image data and the second image data is determined as the image data to be used in the second printing process. The printing system according to claim 2, wherein the printing system is used.

Images