Good paper determination device and printing machine

Abstract

To reduce the occurrence of defective paper and to enable stable good paper determination in a good paper determination device and a printer.SOLUTION: A good paper determination device is to determine good paper according to a print quality of a printed material. The device receives a correction level according to a deviation between a print quality value of the printed material being printed and a preset target value. When the correction level gets smaller than a predetermined determination value, the printed material is determined as good paper.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to, for example, a good paper determination device that determines whether a printed matter printed by a printing machine is good paper, and a printing machine including the good paper determination device.

Background Art

[0002] For example, an offset rotary printing machine for newspapers includes a paper feeding device, an infeed device, a printing device, a web pass device, a folding machine, and a paper discharging device. After starting up, the offset rotary printing machine for newspapers needs to adjust the conveyance position of the web, the printing density, etc. during printing at a low speed. After the adjustment operations such as the conveyance position of the web and the printing density are completed during printing at a low speed after starting up, the newspapers as products are sent out to the shipping facilities connected to the offset rotary printing machine for newspapers. As such a good paper determination device, for example, there is one described in the following patent document.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] After performing adjustment operations such as adjusting the conveyance position of the web and the printing density, the good paper determination operation is carried out visually by the operator. That is, the operator checks the printing quality such as the printing position and the printing density on the web by visually observing the printed matter after the adjustment operation, and performs the good paper determination. While the adjustment operation and the good paper determination operation are being performed, the web becomes defective paper such as white waste, black waste, and poor quality. The determination of good paper for the printed matter depends largely on the operator's rule of thumb, and there are variations in the determination. Therefore, when an inexperienced operator performs the good paper determination of the printed matter, there is a problem that the amount of defective paper increases.

[0005] The present disclosure aims to solve the above-described problems, and provides a good paper determination device and a printing machine that reduce the occurrence of defective paper and enable stable good paper determination.

Means for Solving the Problems

[0006] The good paper determination device of the present disclosure for achieving the above object is a good paper determination device that performs good paper determination according to the printing quality of the printed matter, and a correction degree according to the deviation between the printing quality value of the printed matter being printed and a preset target value is input, and when the correction degree becomes smaller than a preset determination value, the printed matter is determined as good paper.

[0007] Further, the printing machine of the present disclosure includes a paper feeding device that supplies a printing medium, a printing device that performs printing on the printing medium, a web path device that longitudinally cuts and stacks the printed printing medium and changes the conveyance path and the path length, a folding machine that longitudinally folds the longitudinally cut and stacked printing medium and then transversely cuts it to form a folded sheet, and the good paper determination device.

Effects of the Invention

[0008] According to the good paper determination device and the printing machine of the present disclosure, it is possible to reduce the occurrence of defective paper and enable stable good paper determination.

Brief Description of the Drawings

[0009]

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Figure 11

[0010] Hereinafter, with reference to the drawings, preferred embodiments of the present disclosure will be described in detail. Note that the present disclosure is not limited by this embodiment, and when there are a plurality of embodiments, those configured by combining each embodiment are also included. In addition, the constituent elements in the embodiment include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within the so-called equivalent range.

[0011] [Offset Rotary Printing Press for Newspapers] FIG. 11 is a schematic configuration diagram showing an offset rotary printing press for newspapers according to the present embodiment. The offset rotary printing press for newspapers according to the present embodiment is a 4×1 rotary printing press in which the size of the plate cylinder of the printing device is set to 4-page width × 1-page circumference, but it may also be a 4×2 rotary printing press in which the size of the plate cylinder is set to 4-page width × 2-page circumference.

[0012] As shown in FIG. 11, the printing press according to the present embodiment is an offset rotary printing press P for newspapers. The offset rotary printing press P for newspapers includes a paper feeding device R, an infeed device I, a printing device U, a web pass device D, and a folding machine F.

[0013] The paper feeding device R has a plurality (five in the present embodiment) of paper feeding units R1 to R5. The infeed device I has a plurality (five in the present embodiment) of infeed units I1 to I5. The printing device U has a plurality (five in the present embodiment) of printing units U1 to U5. The web pass device D has one web pass unit D1. The folding machine F has one folding unit F1.

[0014] In the paper feeding device R, the paper feeding units R1 to R5 have substantially the same configuration and have holding arms for holding three wound papers around which a web (printing medium) W is wound in a roll shape. By rotating the holding arm, the wound paper can be rotated to the paper feeding position. In the infeed device I, the infeed units I1 to I5 have substantially the same configuration and maintain the tension of the web W running through the printing device U at an appropriate value stably by adjusting the tension of the web W fed to each of the printing units U1 to U5 of the printing device U. Note that the tension of the web W from the paper feeding device R to the infeed device I is adjusted by a braking device (not shown) provided in the paper feeding units R1 to R5.

[0015] In the printing device U, the printing units U1 to U5 are multicolor printing units capable of performing double-sided four-color printing. However, each of the printing units U1 to U5 can be divided vertically into printing units U11 to U52 capable of performing double-sided two-color printing. The printing units U11 to U52 have substantially the same configuration and include an ink supply device, a plate cylinder, a blanket cylinder, and the like.

[0016] In the web path device D, the web path unit D1 is provided for the printing units U1 to U5. The web path unit D1 includes a slitter that cuts the web W in the central portion in the width direction along the longitudinal direction (the conveyance direction of the web W), a turn bar that sets the conveyance path of the longitudinally cut web W, a compensator that adjusts the picture position in the longitudinal direction of the web W, and the like. Each web W printed by the printing units U1 to U5 is longitudinally cut by the slitter in the web path unit D1, the conveyance path is changed by the turn bar, the picture position is adjusted by the compensator, and then they are stacked in a predetermined order.

[0017] In the folder F, the folding unit F1 longitudinally folds the web W introduced with a plurality of webs W stacked from the web path unit D1, transversely cuts it at a predetermined length, transversely folds it to form a folded sheet, and discharges it as a newspaper.

[0018] <Good paper determination system> FIG. 1 is a block configuration diagram showing good paper determination control in the offset rotary printing machine for newspapers of the present embodiment.

[0019] As shown in FIG. 1, the good paper determination system 10 includes an operation device 11, an alignment adjustment device 12, a cutting position adjustment device 13, a width direction position adjustment device 14, a printing density adjustment device 15, a good paper determination device 16, a display device 17, a storage unit 18, and a conveyance switching device 19.

[0020] The operation device 11 can be operated by an operator, and by operating the operation device 11, the operator can transmit various operation signals to the good paper determination device 16.

[0021] The registration adjustment device 12 is arranged in the printing units U1 to U5 (see FIG. 11). The registration adjustment device 12 has a camera, and the camera photographs the registration marks printed on the web W. The registration adjustment device 12 compares the position of the registration mark of the reference color on the web W with the position of the registration mark for each color other than the reference color of the web W photographed by the camera. The registration adjustment device 12 outputs a registration correction signal corresponding to the deviation between the position of the registration mark of the reference color and the position of the registration mark for each color other than the reference color. The registration correction signal includes a registration correction amount for reducing the deviation between the position of the registration mark of the reference color and the position of the registration mark for each color other than the reference color. The registration adjustment device 12 corrects the deviation of the printed image of the web W by adjusting the top position and the left-right position of each plate cylinder in the printing units U1 to U5 based on the registration correction signal.

[0022] The cutting position adjustment device 13 is arranged in the folding unit F1 (see FIG. 11). The cutting position adjustment device 13 has a camera, and the camera photographs the pattern printed on the web W. The cutting position adjustment device 13 compares the rotation reference timing by the folding unit F1 with the actual timing of the web W photographed by the camera. The cutting position adjustment device 13 outputs a cutting position correction signal corresponding to the deviation between the rotation reference timing of the folding unit F1 and the actual printing pattern timing. The cutting position correction signal includes a cutting position correction amount for reducing the deviation between the rotation reference timing of the folding unit F1 and the actual printing pattern timing. The cutting position adjustment device 13 corrects the deviation of the cutting position of the web W by adjusting the position of the compensator that adjusts the position of the pattern in the longitudinal direction of the web W in the web path unit D1 based on the cutting position correction signal.

[0023] The width direction position adjustment device 14 is arranged in the folding unit F1 (see FIG. 11). The width direction position adjustment device 14 has a camera arranged at a position serving as a reference in the pattern width direction of the printing machine. The camera photographs a pattern mark printed at a specified position in the pattern width direction of the web W. The width direction position adjustment device 14 compares the reference position of the camera with the position of the pattern mark photographed by the camera. The width direction position adjustment device 14 outputs a width direction position correction signal according to the deviation between the reference position of the camera and the position of the actual web end. The width direction position correction signal includes a width direction position correction amount for reducing the deviation between the reference position of the camera and the position of the actual web end. The width direction position adjustment device 14 corrects the deviation in the width direction position of the web W by adjusting the positions of a plurality of turn bars in the web pass unit D1 based on the width direction position correction signal.

[0024] The printing density adjustment device 15 is arranged in the printing units U1 to U5 (see FIG. 11). The printing density adjustment device 15 has a camera as a density sensor, and the camera (density sensor) photographs the pattern printed on the web W. The printing density adjustment device 15 compares the density of the reference printed pattern on the web W with the density of the actual printed pattern on the web W photographed by the camera. The printing density adjustment device 15 outputs a printing density correction signal according to the deviation between the density of the reference printed pattern and the density of the actual printed pattern. The printing density correction signal includes a printing density correction amount for reducing the deviation between the density of the reference printed pattern and the density of the actual printed pattern. The printing density adjustment device 15 corrects the deviation in the printing density of the web W by adjusting the ink supply amounts in the printing units U1 to U5 based on the printing density correction signal.

[0025] The good paper determination device 16 performs a good paper determination according to the printing quality of the printed matter. The good paper determination device 16 is connected to the operation device 11, the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15. The good paper determination device 16 receives an operation signal from the operation device 11, an alignment correction signal from the alignment adjustment device 12, a cutting position correction signal from the cutting position adjustment device 13, a width direction position correction signal from the width direction position adjustment device 14, and a printing density correction signal from the printing density adjustment device 15.

[0026] In this embodiment, as printing quality, a target position, a cutting position, a width direction position, and a printing density are set. That is, the printing quality is the product quality of a newspaper as a product manufactured by the newspaper offset rotary printing machine P. The good paper determination device 16 determines that the paper is good if the target position, the cutting position, the width direction position, and the printing density as the quality of the product of the newspaper are at the target values. However, the printing quality is not limited to the target position, the cutting position, the width direction position, and the printing density, and at least one of the target position, the cutting position, the width direction position, and the printing density may be set. Further, as the printing quality, something other than the target position, the cutting position, the width direction position, and the printing density may be set.

[0027] The good paper determination device 16 receives a correction degree corresponding to the deviation between the printing quality values (target position, cutting position, width direction position, printing density) of the printed material (newspaper) being printed and the preset target values. When the correction degree becomes smaller than the preset determination value, the printed material is determined to be good paper. The details of the method for determining good paper by the good paper determination device 16 will be described later.

[0028] The display device 17 is connected to the good paper determination device 16. The display device 17 displays the determination status and the determination result of the good paper determination device 16.

[0029] The storage unit 18 is connected to the good paper determination device 16. The storage unit 18 stores determination values for the good paper determination device 16 to execute good paper determination. In this case, the storage unit 18 also stores past determination situations. The determination situation includes the printing conditions at the time of good paper determination. It is a determination history in which the determination value is loosened or tightened according to various printing conditions (for example, material information such as paper type and ink, portrait pages, number of pages, number of color pages, paper path route, etc.), or a correction history of the determination value. That is, the good paper determination device 16 takes into account printing conditions, material information, etc. in addition to the control states of the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15, and automatically learns the good paper determination criteria from past good paper determination results. Also, it learns the correction results of veteran operators. For example, when learning that the time to become good paper varies depending on the paper type, it changes the determination criteria, such as changing the corrected determination time as the determination value.

[0030] In addition, the storage unit 18 stores the printing conditions of the first draft, restart, replacement page, and additional paper path change, and the determination values of the respective determination items. The determination items here refer to the print quality (alignment position, cutting position, width direction position, printing density) of the printed matter (newspaper) being printed. If the printed matter to be printed next is the first draft, the good paper determination device 16 performs good paper determination based on the reference determination items and determination values. On the other hand, when restarting the stopped printing machine for printing after good paper determination in the first draft printing, good paper determination is performed based on the restart determination items and determination values. Also, when performing plate replacement for some printed surfaces (replacement pages) due to newspaper article replacement and then printing again, only this replacement page part is subjected to good paper determination based on the replacement page determination items and determination values. Also, when printing again due to additional paper path change, good paper determination is performed based on the additional paper path change determination items and determination values.

[0031] That is, when starting up the printing for restart, replacement sheet, or additional change of the paper passage, since the good paper determination has already been carried out in the first draft, for the parts without changes, the control states of the registration adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15 are good, and the degree of correction according to the deviation between the printing quality value of the printed matter and the preset target value is also small. Therefore, the good paper determination device 16 corrects the determination items and determination values according to the printing conditions of the first draft, restart, replacement sheet, and additional change of the paper passage. For example, for the first draft, since the printing machine is started up from the initial state, the good paper determination is performed with strict determination items and determination values as a reference. When restarting and printing after restarting, since each adjustment device of the rotary press restarts from the position of the good paper state of the first draft, the good paper determination may be performed with loose determination items and determination values. When printing again after changing the plate for some printing surfaces (replacement sheets), only this replacement sheet part is subjected to the good paper determination with the determination items and determination values of the replacement sheet. When printing again due to an additional change in the paper passage, only the web of this additional change in the paper passage is subjected to the good paper determination with the determination items and determination values of the additional change in the paper passage. In this way, according to the printing startup states such as the first draft, restart, replacement sheet, and additional change of the paper passage as printing conditions, the determination items (printing quality) are selected from the registration position, cutting position, width direction position, and printing density, and the determination values are set, so that a good good paper determination can be performed.

[0032] For example, if the levels of the adjustment degrees of the quality adjustment values are set as A1 (requiring sufficient adjustment), A2 (requiring adjustment), and A3 (minor adjustment), the levels of the adjustment degrees for the first draft, restart, replacement sheet, and additional change of the paper passage are as follows. Note that for the replacement sheet, the through sheet has the same conditions as the restart, and the additional change of the paper passage is the condition only for the changed web, and the rest are the restart conditions. First draft: Registration position A1, cutting position A1, width direction position A1, printing density A1 Restart: Registration position A3, cutting position A3, width direction position A3, printing density A3 Replacement sheet: Registration position A2, cutting position A3, width direction position A3, printing density A1 Through sheet: Registration position A3, cutting position A3, width direction position A3, printing density A3 Paper Insertion Additional Change Target Position A1, Cutting Position A1, Width Direction Position A1, Printing Density A1

[0033] The conveying switching device 19 is arranged in the newspaper shipping facility 20. The conveying switching device 19 switches the conveying destinations of defective papers generated when the newspaper offset rotary printing machine P is started up and good papers discharged after the good paper determination by the good paper determination device 16.

[0034] <Shipping Facility> FIG. 2 is a schematic diagram showing the newspaper shipping facility.

[0035] As shown in FIG. 2, the shipping facility 20 includes a loading device 21, a carrier device 22, a counter stacker 23, and a delivery conveyor 24.

[0036] The loading device 21 is arranged adjacent to the newspaper offset rotary printing machine P. The printed matter (newspaper) printed by the newspaper offset rotary printing machine P is conveyed to the loading device 21 by the paper discharge conveyor 31. The loading device 21 supplies the printed matter conveyed by the paper discharge conveyor 31 to the carrier device 22. The carrier device 22 is gripped and conveyed by a gripper device (not shown) at the end of the printed matter and delivered to the counter stacker 23. The counter stacker 23 has a counting sensor 32. The counter stacker 23 counts one batch of the printed matter conveyed by the carrier device 22 by the counting sensor 32 and accumulates it in a vertical row. The counter stacker 23 rotates the printed matter accumulated in a vertical row by 180 degrees for each batch and stacks it up, and unloads it as one stack. The delivery conveyor 24 conveys one stack of printed matter to the shipping truck 33.

[0037] The transfer switching device 19 is arranged in the loading device 21. The transfer switching device 19 switches the transfer destination of the printed matter between the shipping line and the defective paper discharge line. After the start-up of the newspaper offset rotary printing machine P, during printing at a low speed, adjustment operations such as printing quality (registration position, cutting position, width direction position, printing density) are carried out, so defective papers such as white waste, black waste, and quality defects are generated. The transfer switching device 19 does not supply the printed matter determined to be defective paper to the carrier device 22 until it is determined by the good paper determination device 16 that the printed matter is good paper, and discharges it to the outside through the defective paper discharge line 21b. Thereafter, when the good paper determination device 16 determines that the printed matter is good paper, the transfer switching device 19 switches the transfer destination of the printed matter from the defective paper discharge line 21b to the shipping line 21a, and supplies the printed matter determined to be good paper to the carrier device 22 through the shipping line 21a. Note that the transfer switching device 19 may be arranged anywhere in the shipping facility 20, not limited to the loading device 21, as long as it can switch the transfer destination of the printed matter between the shipping line and the defective paper discharge line.

[0038] The newspaper offset rotary printing machine P is controlled by a printing control device PC (press control). The good paper determination system 10 is connected to the printing control device PC. That is, the registration adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15 are connected to the printing control device PC and also connected to the good paper determination device 16. The good paper determination device 16 performs switching control of the transfer switching device 19 based on correction signals from the registration adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15.

[0039] <Good paper determination process> FIG. 3 is a flowchart showing the good paper determination method, and FIG. 4 is a time chart showing the good paper determination method.

[0040] When the correction degree for bringing the print quality (registration position, cutting position, width direction position, print density) closer to the target value becomes smaller than the determination value, the good paper determination device 16 determines the printed matter as good paper. The good paper determination device 16 determines the printed matter as good paper when the correction degree becomes smaller than the determination value and the printed matter printed before the correction degree becomes smaller than the determination value is discharged from the newspaper offset rotary printing machine P.

[0041] In addition, the good paper determination device 16 displays the change in the correction degree for bringing the print quality closer to the target value on the display device 17. Further, the good paper determination device 16 corrects the determination value based on the past good paper determination results.

[0042] Specifically described below, the good paper determination device 16 compares each correction degree for bringing the registration position, cutting position, width direction position, and print density as print quality values closer to their respective target values with each determination value. In this case, the good paper determination device 16 simultaneously executes the determination of the registration position, cutting position, width direction position, and print density with each correction degree and each determination value. Therefore, in the following description, the determination process of one correction degree and determination value in the registration position, cutting position, width direction position, and print density will be described.

[0043] As shown in FIG. 3, in step S11, after the newspaper offset rotary printing machine P is started, during printing at a low speed, adjustment operations such as the registration position, cutting position, width direction position, and print density as print quality values are started. In step S12, the good paper determination device 16 determines whether a correction signal has been input from the registration adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15. If the good paper determination device 16 determines that no correction signal has been input (No), in step S13, it determines that the printed matter is good paper and proceeds to step S17.

[0044] In step S12, if the good paper determination device 16 determines that a correction signal has been input (Yes), in step S14, the time Tn during which the correction signal has been input (1~n)It is determined whether it is equal to or less than a preset determination time Tj (for example, 0.1 second). The time Tn when the correction signal is input is the correction time as the degree of correction, and is the correction time for bringing the print quality value closer to the target value. Further, the determination time Tj is the correction determination time as the determination value, and is set in consideration of a margin with respect to the target value. If the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, at step S15, after resetting the good paper time Ta, which will be described later, to 0, the process returns to step S12.

[0045] On the other hand, if the good paper determination device 16 determines (Yes) that the correction time Tn is less than or equal to the correction determination time Tj, at step S16, the good paper determination device 16 determines that the printed matter is good paper. Then, at step S17, a timer for measuring the good paper time Ta during which the correction time Tn is less than or equal to the correction determination time Tj is started. Then, it is determined whether the good paper time Ta exceeds a defective paper discharge time Taj (for example, 5 seconds) as a preset predetermined time. That is, it is determined whether or not the defective paper discharge time Taj has elapsed after the good paper determination at step S13 or step S16, by the non-input of the correction signal at step S12 or the correction time Tn becoming less than or equal to the correction determination time Tj at step S14.

[0046] Here, the predetermined time is the waiting time until the print quality value of the printed matter stabilizes after the good paper determination device 16 determines good paper without receiving a correction signal, and also after the correction time Tn is less than or equal to the correction determination time Tj and good paper is determined. In the present embodiment, the predetermined time is set as the defective paper discharge time Taj. That is, even if the alignment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15 adjust the alignment position, the cutting position, the width direction position, and the print density, printed matter of defective paper remains on the conveyance line from each adjustment device 12, 13, 14, 15 to the conveyance switching device 19. The defective paper discharge time Taj is the time until the printed matter of defective paper remaining on the conveyance line from each adjustment device 12, 13, 14, 15 to the loading device 21 is discharged to the outside by the conveyance switching device 19. Note that the defective paper discharge time Taj varies according to the form of the newspaper offset rotary printing machine P, the printing speed, and the like. Generally, since the defective paper discharge time Taj is longer than the waiting time until the print quality value stabilizes, the predetermined time is set as the defective paper discharge time Taj here. However, when the waiting time is longer than the defective paper discharge time Taj, the predetermined time may be set as the waiting time, or may be set separately.

[0047] If the good paper determination device 16 determines (No) that the good paper time Ta has not elapsed the defective paper discharge time Taj, it returns to step S12 and repeats the processes from step S12 to step S17. At this time, in step S14, if the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, in step S15, the timer started in step S17 is stopped and the measured good paper time Ta is reset to 0. On the other hand, if the good paper determination device 16 determines (Yes) that the good paper time Ta has exceeded the defective paper discharge time Taj, in step S18, it outputs a shipping start signal to the conveyance switching device 19 to operate the conveyance switching device 19 and supplies the printed matter determined as good paper to the carrier device 22.

[0048] In this case, when the good paper determination device 16 determines good paper in the determination process based on all correction signals from the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15, it operates the conveyance switching device 19 and supplies the printed matter determined to be good paper to the carrier device 22.

[0049] Here, a specific example of the good paper determination process by the good paper determination device 16 will be described. After the start of the newspaper offset rotary printing machine P, during printing at a low speed, the alignment adjustment device 12 calculates the deviation between the position of the alignment mark of the reference color and the position of the alignment mark for each color other than the reference color at every preset adjustment time Ts. In this case, it is preferable that the deviation between the position of the alignment mark of the reference color and the position of the alignment mark for each color other than the reference color is the average value of the deviations calculated multiple times. Also, the correction amount set according to the deviation is preferably a value about 80% of the deviation. The same applies to the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15.

[0050] As described above, the good paper determination device 16 compares each degree of correction and each determination value for bringing the alignment position, cutting position, width direction position, and printing density, which are print quality values, closer to their respective target values, and performs good paper determination. At this time, the good paper determination device 16 simultaneously executes the determination of the alignment position, cutting position, width direction position, and printing density with each degree of correction and each determination value. Then, the good paper determination device 16 determines the printed matter as good paper when all degrees of correction in the alignment position, cutting position, width direction position, and printing density become smaller than the determination value. However, the good paper determination device 16 may select one or more print qualities according to the printing conditions from the alignment position, cutting position, width direction position, and printing density, and determine the printed matter as good paper when all degrees of correction in the selected print quality become smaller than the determination value.

[0051] As shown in FIG. 4, at time t1, a correction signal S1 is output. The correction signal S1 has a correction time T1 from time t1 to time t2. And at time t2, the correction operation ends. Here, the correction time T1 is not less than the correction determination time Tj. At time t3 when the adjustment time Ts has elapsed from time t2, a correction signal S2 is output. The adjustment time Ts is the total time of the waiting time until the printed matter reaches the sensing device such as a camera with the print quality value after the adjustment devices 12, 13, 14, 15 perform various adjustments and the data collection time until a new correction is performed. The correction signal S2 has a correction time T2 from time t3 to time t4. And at time t4, the correction operation ends. Here, although the correction time T2 is shorter than the correction time T1, it is not less than the correction determination time Tj. At time t5 when the adjustment time Ts has elapsed from time t4, a correction signal S3 is output. The correction signal S3 has a correction time T3 from time t5 to time t6. And at time t6, the correction operation ends. Here, although the correction time T3 is shorter than the correction times T1 and T2, it is not less than the correction determination time Tj.

[0052] And if there is no deviation at time t7 when the adjustment time Ts has elapsed from time t6, the correction signal S is not output. Subsequently, if there is no deviation at time t8 when the adjustment time Ts has elapsed from time t7, the correction signal S is not output. That is, the correction time T at times t7 and t8 is 0. That is, this state is not more than the correction determination time Tj. Therefore, at times t7 and t8 when the correction signal S is not output, the printed matter is determined to be good paper. Also, at time t9 when the adjustment time Ts has elapsed from time t8, a correction signal S4 is output. The correction signal S4 has a correction time T4 from time t9 to time t10. Here, the correction time T4 is even shorter than the correction times T1, T2, and T3 and becomes not more than the correction determination time Tj. Therefore, even at time t10 when the correction time Tn becomes not more than the correction determination time Tj, the printed matter is determined to be good paper. And if it is determined that the good paper time Ta from t7 to t11 exceeds the defective paper discharge time Taj, the transport switching device 19 is operated by outputting a transport start signal to the transport switching device 19, and the printed matter determined to be good paper is supplied to the carrier device 22.

[0053] Note that the specific example of the good paper determination process by the good paper determination device 16 is not limited to the above-described one. FIG. 5 is a flowchart showing a first modification example of the good paper determination method.

[0054] As shown in FIG. 5, in step S21, after the newspaper offset rotary printing machine P is started, during printing at a low speed, the adjustment operation of the print quality value is started. In step S22, the good paper determination device 16 determines whether a correction signal is input from the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15. If the good paper determination device 16 determines that no correction signal is input (No), in step S23, it determines whether the time during which no correction signal is input exceeds a predetermined time set in advance, here, the defective paper discharge time Taj. Note that the predetermined time is not limited to the defective paper discharge time Taj and may be set separately.

[0055] If the good paper determination device 16 determines that the time during which no correction signal is input does not exceed the predetermined time (defective paper discharge time Taj) (No), it returns to step S22. On the other hand, if it determines that the time during which no correction signal is input exceeds the predetermined time (Yes), in step S27, the good paper determination device 16 determines that the printed matter is good paper and proceeds to step S28.

[0056] In step S22, if the good paper determination device 16 determines that a correction signal is input (Yes), in step S24, it determines whether the correction time Tn is equal to or less than the determination time Tj. If the good paper determination device 16 determines that the correction time Tn is not equal to or less than the correction determination time Tj (No), in step S25, it resets the good paper time Ta to 0 and then returns to step S22.

[0057] On the other hand, when the good paper determination device 16 determines (Yes) that the correction time Tn is less than or equal to the correction determination time Tj, at step S26, it starts a timer for measuring the good paper time Ta during which the correction time Tn is less than or equal to the correction determination time Tj. Then, it determines whether the good paper time Ta exceeds the defective paper discharge time Taj. If the good paper determination device 16 determines (No) that the good paper time Ta has not elapsed beyond the defective paper discharge time Taj, it returns to step S22 and repeats the processing from step S22 to step S26. At this time, if at step S24, the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, at step S25, it stops the timer started in step S26 and resets the measured good paper time Ta to 0.

[0058] If the good paper determination device 16 determines (Yes) that the good paper time Ta exceeds the defective paper discharge time Taj, at step S27, it determines that the printed matter is good paper. Then, at step S28, it outputs a send start signal to the conveyance switching device 19 to operate the conveyance switching device 19 and supplies the printed matter determined to be good paper to the carrier device 22.

[0059] In this case, when the good paper determination device 16 makes a good paper determination in the determination process based on all the correction signals from the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15, it operates the conveyance switching device 19 and supplies the printed matter determined to be good paper to the carrier device 22.

[0060] FIG. 6 is a flowchart showing a second modification example of the good paper determination method, and FIG. 7 is a time chart showing a second modification example of the good paper determination method.

[0061] As shown in FIG. 6, after the newspaper offset rotary printing machine P is started in step S31, during printing at a low speed, adjustment operations such as the registration position, cutting position, width direction position, and printing density as print quality values are started. In step S32, the good paper determination device 16 determines whether a correction signal is input from the registration adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15. If the good paper determination device 16 determines that no correction signal is input (No), in step S33, it determines that the printed matter is good paper and proceeds to step S37.

[0062] In step S32, if the good paper determination device 16 determines that a correction signal is input (Yes), in step S34, it determines whether the correction time Tn is less than or equal to the correction determination time Tj. If the good paper determination device 16 determines that the correction time Tn is not less than or equal to the correction determination time Tj (No), in step S35, it resets the good paper time Ta to 0 and then returns to step S32.

[0063] On the other hand, if the good paper determination device 16 determines that the correction time Tn is less than or equal to the correction determination time Tj (Yes), in step S36, the good paper determination device 16 determines that the printed matter is good paper. Then, in step S37, a counter for measuring the number of discharged printed matters Na discharged after the correction time Tn becomes less than or equal to the correction determination time Tj is started. Then, it is determined whether the number of discharged printed matters Na exceeds the preset number of defective paper discharges Nj. That is, by not inputting a correction signal in step S32 or by the correction time Tn becoming less than or equal to the correction determination time Tj in step S34, it is determined whether printed matters with the number of defective paper discharges Nj are discharged after being determined as good paper in step S33 or step S36. The number of defective paper discharges Nj is the number of printed parts of the printed matter of defective paper remaining on the conveyance line from each adjustment device 12, 13, 14, 15 to the cutting device 21. Note that the number of defective paper discharges Nj varies according to the form of the newspaper offset rotary printing machine P and the like.

[0064] When the good paper determination device 16 determines (No) that the number of discharged sheets N does not exceed the number of defective paper discharged sheets Nj, it returns to step S32 and repeats the processes from step S32 to step S37. At this time, if at step S34, the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, then at step S35, it stops the counter started at step S37 and resets the measured number of discharged sheets Na to 0. On the other hand, if it determines (Yes) that the number of discharged sheets Na exceeds the number of defective paper discharged sheets Nj, then at step S38, the good paper determination device 16 outputs a sending start signal to the conveyance switching device 19 to operate the conveyance switching device 19 and supply the printed matter determined to be good paper to the carrier device 22.

[0065] Here, a specific example of the good paper determination process by the good paper determination device 16 will be described. As shown in FIG. 7, at time t1, a correction signal S1 is output. The correction signal S1 has a correction time T1 from time t1 to time t2. Then, at time t2, the correction operation ends. Here, the correction time T1 is not less than or equal to the correction determination time Tj. At time t3 when the adjustment time Ts has elapsed from time t2, a correction signal S2 is output. The correction signal S2 has a correction time T2 from time t3 to time t4. Then, at time t4, the correction operation ends. Here, although the correction time T2 is shorter than the correction time T1, it is not less than or equal to the correction determination time Tj. At time t5 when the adjustment time Ts has elapsed from time t4, a correction signal S3 is output. The correction signal S3 has a correction time T3 from time t5 to time t6. Then, at time t6, the correction operation ends. Here, although the correction time T3 is shorter than the correction times T1 and T2, it is not less than or equal to the correction determination time Tj.

[0066] And if there is no deviation at time t7 when the adjustment time Ts has elapsed from time t6, the correction signal S is not output. Subsequently, if there is no deviation at time t8 when the adjustment time Ts has elapsed from time t7, the correction signal S is not output. That is, the correction time T at times t7 and t8 is 0. That is, this state is within the correction determination time Tj. Therefore, at times t7 and t8 when the correction signal S is not output, the printed matter is determined to be good paper. Also, at time t9 when the adjustment time Ts has elapsed from time t8, the correction signal S4 is output. The correction signal S4 has a correction time T4 from time t9 to time t10. Here, the correction time T4 is shorter than the correction times T1, T2, and T3 and is within the correction determination time Tj. Therefore, even at time t10 when the correction time T becomes within the correction determination time Tj, the printed matter is determined to be good paper. And if it is determined that the number of discharged sheets Na from t7 to t11 exceeds the number of defective paper discharged sheets Nj, a start signal for sending is output to the conveyance switching device 19 to operate the conveyance switching device 19, and the printed matter determined to be good paper is supplied to the carrier device 22.

[0067] Figure 8 is a flowchart showing a third modification of the good paper determination method.

[0068] As shown in Figure 8, in step S41, after the newspaper offset rotary printing machine P is started, during printing at a low speed, the adjustment operation of the print quality value is started. In step S42, the good paper determination device 16 determines whether a correction signal from the rough adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15 has been input. If the good paper determination device 16 determines that no correction signal has been input (No), in step S43, it is determined whether the time during which no correction signal has been input exceeds a predetermined time set in advance, here, the defective paper discharge time Taj. Note that the predetermined time is not limited to the defective paper discharge time Taj and may be set separately.

[0069] When the good paper determination device 16 determines (No) that the time during which no correction signal is input does not exceed a predetermined time (defective paper discharge time Taj), it returns to step S42. On the other hand, when it determines (Yes) that the time during which no correction signal is input exceeds the predetermined time, at step S47, the good paper determination device 16 determines that the printed matter is good paper and proceeds to step S48.

[0070] At step S42, when the good paper determination device 16 determines (Yes) that a correction signal has been input, at step S44, it determines whether the correction time Tn is less than or equal to the correction determination time Tj. When the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, at step S45, it resets the discharge count Na to 0 and then returns to step S42.

[0071] On the other hand, when the good paper determination device 16 determines (Yes) that the correction time Tn is less than or equal to the correction determination time Tj, at step S46, it starts a counter for measuring the discharge count Na of the printed matter discharged after the correction time Tn has become less than or equal to the correction determination time Tj. Then, it determines whether the discharge count Na exceeds the defective paper discharge count Nj. When the good paper determination device 16 determines (No) that the discharge count N does not exceed the defective paper discharge count Nj, it returns to step S42 and repeats the processes from step S42 to step S46. At this time, when at step S44 the good paper determination device 16 determines (No) that the correction time Tn is not less than or equal to the correction determination time Tj, at step S45, it stops the counter started at step S46 and resets the measured discharge count Na to 0.

[0072] When the good paper determination device 16 determines (Yes) that the discharge count Na exceeds the defective paper discharge count Nj, at step S47, the good paper determination device 16 determines that the printed matter is good paper. Then, at step S48, the good paper determination device 16 operates the conveyance switching device 19 by outputting a sending start signal to the conveyance switching device 19 and supplies the good printed matter to the carrier device 22.

[0073] FIG. 9 is a flowchart showing a fourth modification of the good paper determination method, and FIG. 10 is a time chart showing a fourth example of the good paper determination method.

[0074] As shown in FIG. 9, after the newspaper offset rotary printing press P is started in step S51, during printing at a low speed, adjustment operations such as the target position, cutting position, width direction position, and printing density as printing quality values are started.

[0075] In step S52, the good paper determination device 16 determines whether or not the deviation amount Qd between the printing quality value (target position, cutting position, width direction position, printing density) Q and the printing quality target value Qt is equal to or less than a preset determination amount Qdj. That is, it is determined whether or not the deviation amount Qd input as a correction signal is equal to or less than the preset determination amount Qdj. The deviation amount Qd is a correction amount as a correction degree, and the determination amount Qdj is a determination value. If the good paper determination device 16 determines that the deviation amount Qd is not equal to or less than the determination amount Qdj (No), it returns to step S52.

[0076] On the other hand, if the good paper determination device 16 determines that the deviation amount Qd is equal to or less than the determination amount Qdj (Yes), in step S53, the printed matter is determined to be good paper. Then, in step S54, the good paper determination device 16 outputs a start signal to the conveyance switching device 19 to operate the conveyance switching device 19, and supplies the printed matter determined to be good paper to the carrier device 22. At this time, it is preferable to wait until the printed matter of defective paper from each of the adjustment devices 12, 13, 14, 15 to the conveyance switching device 19 is discharged by the waste paper discharging device 21 and then operate the conveyance switching device 19.

[0077] Here, a specific example of the good paper determination process by the good paper determination device 16 will be described. As shown in FIG. 10, a correction amount Qr is set based on the deviation amount Qd between the printed quality value Q and the printed quality target value Qt, and the printed quality value Q is made to approach the printed quality target value Qt. Then, at the time T21 when the peak of the printed quality value Q becomes equal to or less than the determination amount Qdj, the printed matter is determined to be good paper. In this case, when the peak of the printed quality value Q becomes equal to or less than the determination amount Qdj, and the differential value or the change rate (the amount of change per unit time) of the printed quality value Q is smaller than a predetermined value (for example, when it is close to 0), the printed matter is determined to be good paper. Further, from the time point (time T21) when the peak of the printed quality value Q becomes equal to or less than the determination amount Qdj, if the state of being equal to or less than the determination amount Qdj continues for a preset time (predetermined time), the printed matter may be determined to be good paper.

[0078] Incidentally, while the good paper determination device 16 is performing the good paper determination of the printed matter, it displays the data input from the aiming adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15 on the display device 17. For example, the display device 17 displays the graphs shown in FIGS. 4, 7, and 10.

[0079] Also, although various determination values are stored in the storage unit 18 of the good paper determination device 16, the determination values may be automatically learned and corrected based on past good paper determination results.

[0080] [Operation and Effect of the Present Embodiment] The good paper determination device according to the first aspect is a good paper determination device 16 that performs good paper determination according to the printed quality of the printed matter. A degree of correction corresponding to the deviation between the printed quality value of the printed matter being printed and a preset target value is input, and when the degree of correction becomes smaller than a preset determination value, the printed matter is determined to be good paper.

[0081] According to the good paper determination device according to the first aspect, when the degree of correction according to the deviation between the print quality value of the printed matter being printed and the preset target value becomes smaller than the determination value, the printed matter is determined as good paper, so that the good paper determination of the printed matter can be automatically performed. Therefore, the variation in the good paper determination of the printed matter can be reduced, the occurrence of defective paper can be reduced, and stable good paper determination can be enabled. In addition, when the newspaper offset rotary printing machine P is started, the work by the operator can be reduced, and labor saving can be achieved.

[0082] The good paper determination device according to the second aspect outputs a shipping start signal for transporting the printed matter to the shipping facility 20 when the printed matter is determined as good paper. Thereby, when the printed matter is determined as good paper, the printed matter determined as good paper can be appropriately transported to the shipping facility 20.

[0083] The good paper determination device according to the third aspect outputs a shipping start signal when the printed matter is determined as good paper and the state where the degree of correction is smaller than the determination value continues for a preset predetermined time or more. Thereby, when the printed matter is determined as good paper and the stable printing state continues for a predetermined time, the printed matter determined as good paper will be transported to the shipping facility 20, and the shipping of the printed matter determined as defective paper can be suppressed.

[0084] The good paper determination device according to the fourth aspect determines the printed matter as good paper when the state where the degree of correction is smaller than the determination value continues for a preset predetermined time or more. Thereby, the accuracy of the good paper determination of the printed matter can be improved.

[0085] The good paper determination device according to the fifth aspect determines the printed matter as good paper when the state where the degree of correction is smaller than the determination value continues for a preset predetermined time or more, and outputs a shipping start signal for transporting the printed matter to the shipping facility 20. Thereby, when the stable printing state continues for a predetermined time, the printed matter is determined as good paper, and the printed matter determined as good paper will be transported to the shipping facility 20, and the shipping of the printed matter determined as defective paper can be suppressed.

[0086] The good paper determination device according to the sixth aspect is provided with a conveyance switching device 19 that switches the conveyance destination of the printed matter between the shipping line 21a and the defective paper discharge line 21b, and the shipping start signal is a signal for switching the conveyance destination of the printed matter to the shipping line by the conveyance switching device 19. Thereby, when the printed matter is determined to be good paper, the printed matter determined to be good paper can be appropriately conveyed to the shipping facility 20 by the shipping line.

[0087] In the good paper determination device according to the seventh aspect, the degree of correction is the correction time for bringing the print quality value closer to the target value. When the correction time becomes shorter than the correction determination time as the determination value, the printed matter is determined to be good paper. When the correction time becomes shorter than the correction determination time and exceeds a preset predetermined time, a shipping start signal is output. Thereby, by outputting a shipping start signal when the predetermined time is exceeded after the printed matter is determined to be good paper, it is possible to simplify the control by determining the processing timing of the printed matter remaining in the printing machine as defective by time.

[0088] In the good paper determination device according to the eighth aspect, the degree of correction is the correction time for bringing the print quality value closer to the target value. When the correction time becomes shorter than the correction determination time as the determination value, the printed matter is determined to be good paper. Moreover, when the printed matter of a preset number of printed sheets is discharged from the shipping line to the shipping facility 20 after the correction time becomes shorter than the correction determination time, a shipping start signal is output. Thereby, by outputting a shipping start signal when the number of passed sheets exceeds after the printed matter is determined to be good paper, it is possible to improve the accuracy of control by determining the processing timing of the printed matter remaining in the printing machine as defective paper by the number of printed sheets.

[0089] In the good paper determination device according to the ninth aspect, the degree of correction is the deviation amount between the print quality value and the target value. When the deviation amount becomes smaller than the correction determination amount as the determination value, the printed matter is determined to be good paper. Thereby, it is possible to improve the accuracy of good paper determination.

[0090] The good paper determination device according to the tenth aspect is provided with a display device 17 that displays the change in the degree of correction for bringing the print quality closer to the target value. As a result, the operator can grasp the good paper determination status at any time. Therefore, it can be applied as a support device for good paper determination. Further, it can be used as an educational tool for operators with little experience.

[0091] The good paper determination device according to the eleventh aspect corrects the determination value based on the past good paper determination results and the determination status including the printing conditions at the time of past good paper determination. As a result, the accuracy of good paper determination can be improved. The determination status includes not only the good paper determination results but also the printing conditions at the time of good paper determination. It is the determination history of loosening or tightening the determination value according to various printing conditions, the correction history of the determination value, etc. That is, the good paper determination device 16 takes into account printing conditions, material information, etc. in addition to the control states of the rough positioning device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the print density adjustment device 15, and automatically learns the good paper determination criteria from the past good paper determination results.

[0092] In the good paper determination device according to the twelfth aspect, the print quality is at least one of the rough position, cutting position, width direction position, and print density of the printed matter. As a result, the print quality required for good paper determination can be specified and good paper determination can be performed.

[0093] In the good paper determination device according to the thirteenth aspect, the print quality is selected from the rough position, cutting position, width direction position, and print density according to the printing conditions, and when all the degrees of correction at the selected print quality are smaller than the determination value, the printed matter is determined as good paper. As a result, the determination accuracy of good paper can be improved.

[0094] In the good paper determination device according to the fourteenth aspect, the print quality is selected from the rough position, cutting position, width direction position, and print density according to the printing startup state as the printing conditions for printing the printed matter, and the determination value is set. As a result, the good paper determination of the printed matter can be appropriately performed.

[0095] The printing machine according to the 15th aspect includes a paper feeding device R that supplies a web (printing medium) W, a printing device U that performs printing on the web W, a web path device D that longitudinally cuts and stacks the printed web W and changes the conveyance path and path length, a folding machine F that longitudinally folds the longitudinally cut and stacked web W and then transversely cuts it to form a folded sheet, and a good paper determination device 16. As a result, variations in good paper determination of printed matter can be reduced, the occurrence of defective paper can be reduced, and stable good paper determination can be achieved. In addition, when starting the newspaper offset rotary printing machine P, the work by the operator can be reduced, and labor saving can be achieved.

[0096] In the above-described embodiment, the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15 are of the automatic type, but they may be of the manual type. That is, the good paper determination device 16 of the present embodiment receives a correction signal that is automatically adjusted by the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15. In this case, the operator may manually adjust using the alignment adjustment device 12, the cutting position adjustment device 13, the width direction position adjustment device 14, and the printing density adjustment device 15, and then output a correction signal to the good paper determination device 16 by a button operation or the like.

[0097] In the above-described embodiment, the good paper determination device has been described by applying it to a newspaper offset rotary printing machine, but it can also be applied to other printing machines.

Explanation of reference numerals

[0098] 10 Good paper determination system 11 Operating device 12 Alignment adjustment device 13 Cutting position adjustment device 14 Width direction position adjustment device 15 Printing density adjustment device 16 Good paper determination device 17 Display device 18 Storage unit 19 Conveyance switching device 20 Shipping facility 21 Loading device 22 Carrier device 23 Counter stacker 24 Delivery conveyor 31 Discharge conveyor 32 Counting sensor 33 Shipping truck P Offset rotary printing press for newspapers (printing press) PC Printing control device R Paper feeding device R1~R5 Paper feeding units I Infeed device I1~I5 Infeed units U Printing device U1~U5, U11~U52 Printing units D Web pass device D1 Web pass unit F Folder F1 Folding unit

Claims

1. A good paper determination device that performs good paper determination according to the print quality of a printed matter, a degree of correction corresponding to the deviation between the print quality value of the printed matter being printed and a preset target value is input, when the degree of correction becomes smaller than a preset determination value, the printed matter is determined as good paper, when the printed matter is determined as good paper and the state where the degree of correction is smaller than the determination value continues for a preset predetermined time or more, an emission start signal for transporting the printed matter to the shipping facility is output, a good paper determination device.

2. A good paper determination device that performs good paper determination according to the print quality of a printed matter, a degree of correction corresponding to the deviation between the print quality value of the printed matter being printed and a preset target value is input, when the state where the degree of correction is smaller than a preset determination value continues for a preset predetermined time or more, the printed matter is determined as good paper, a good paper determination device.

3. a transport switching device for switching the transport destination of the printed matter between a shipping line and a defective paper discharge line is provided, and the emission start signal is a signal for switching the transport destination of the printed matter to the shipping line by the transport switching device, the degree of correction is a correction time for bringing the print quality value closer to the target value, when the correction time becomes shorter than a correction determination time as the determination value, the printed matter is determined as good paper, and when the correction time becomes shorter than the correction determination time and exceeds the predetermined time, the emission start signal is output, The good paper determination device according to claim 1.

4. a transport switching device for switching the transport destination of the printed matter between a shipping line and a defective paper discharge line is provided, and the emission start signal is a signal for switching the transport destination of the printed matter to the shipping line by the transport switching device, the degree of correction is a correction time for bringing the print quality value closer to the target value, when the correction time becomes shorter than a correction determination time as the determination value, the printed matter is determined as good paper, and when the correction time becomes shorter than the correction determination time and a preset number of printed matters are discharged from the shipping line to the shipping facility, the emission start signal is output, The good paper determination device according to claim 1.

5. A good paper determination device that performs good paper determination according to the print quality of a printed matter, a degree of correction corresponding to the deviation between the print quality value of the printed matter being printed and a preset target value is input, when the degree of correction becomes smaller than a preset determination value, the printed matter is determined as good paper, A display device is provided that displays a change in the degree of correction for bringing the print quality closer to the target value. Good paper determination device.

6. A paper feeding device that supplies a printing medium, A printing device that performs printing on the printing medium, A web path device that longitudinally cuts and stacks the printed printing medium and changes the conveyance path and path length, A folding machine that longitudinally folds the longitudinally cut and stacked printing medium and then transversely cuts it to form a folded sheet, The good paper determination device according to any one of claims 1 to 5, A printing press comprising:

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