JP3226596B2 - Printing stock inspection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing material inspection apparatus, and more particularly to a printing material inspection apparatus for efficiently inspecting the printing state of a pattern such as a bar code printed on a multi-faced original sheet set. Related to the device.

[0002]

2. Description of the Related Art In order to correctly read a barcode printed on a card or a certificate, it is necessary to check whether the printed barcode satisfies a preset condition immediately after printing. . For example, a bar code printed as an optical condition has a predetermined reflectance (PCS).
Value), and then check that the barcode symbol is printed within a preset dimensional accuracy. Conventionally, such an inspection for the reflectance of a bar code is performed in the state of an original set having a plurality of unit printing areas on which bar codes are printed on a multi-set original set (print original). Instead, it is performed on cards cut to a predetermined size. On the other hand,
Inspection by a manual bar code inspection machine capable of inspecting a bar code irrespective of the type of an inspection object is also performed.

[0003]

As described above, according to the conventional inspection, a printing material in which a plurality of unit printing areas of a barcode corresponding to a card are printed is not cut into a card unless it is cut. Cannot check the printing status of the barcode printed on the printer. For this reason, after the printing process is completed, it is not possible to inspect the quality of the barcode printed thereon in the state of the original set, and immediately restore the printed state even if the state of insufficient printing is detected. Cannot be performed, and the lot must be treated as a defective product.
In addition, if 100% inspection is performed to inspect each card one by one, the inspection efficiency decreases, so sampling inspection must be performed, and bar code printing failures for each card due to uneven printing are detected. There is a problem that you can not.

On the other hand, in a manual bar code inspection machine, an inspector must evaluate the reflectance of a bar code represented by a numeral, and this evaluation requires a skilled inspector. In addition, there is a problem that there is some individual difference in the evaluation result. In addition, this type of manual bar code inspection machine is for inspecting a single card or a bar code printed on an edge of a raw material set, and is located inside a large raw material set. Inspection of the bar code on the card portion is structurally inappropriate. Further, with a barcode printed so as not to be seen by the naked eye, it is difficult to accurately position a manual barcode inspection machine at the barcode portion and inspect the printed state of the code. The present invention has been made based on the current state of the barcode inspection as described above, and an object of the present invention is to cut a raw material set having a plurality of unit print areas each having a barcode printed thereon after the printing process. An object of the present invention is to provide an apparatus for inspecting an original web that can be efficiently inspected beforehand.

[0005]

According to the present invention, an end portion of a printing material provided with a plurality of unit printing areas on which an identification pattern is printed is provided on a cylindrical surface so as to be detachably attached to a reference position. And fixed in the direction of rotation of the cylinder.
Rotating mounting and fixing means for rotating the cylinder in accordance with the length of each unit printing area of the measurement material , and each unit mark of the printing material
A sensor unit that reads the identification pattern printed on the printing area , and the sensor unit and the measurement raw material, the printing raw material being aligned and fixed on the rotating cylinder.
Identification within each unit print area arranged in the axial direction of the cylinder
A drive mechanism for relatively moving in accordance with the pattern position, and a maximum value and a minimum value for the read signal for the unit print area from the sensor unit, and a previous value is calculated from the result.
The identification pattern part and the front in each unit printing area of the printing material
It is possible to distinguish between the base material in each unit printing area of the printing material.
Signal analysis and evaluation for each printing area
Analysis output means for outputting the printing state of the identification pattern determined based on the algorithm . Preferably, the identification pattern is a barcode. Specifically, the printing area is a single card or certificate. More preferably, the sensor unit is provided so as to irradiate a light beam at a tilted angle to a surface in a direction orthogonal to the rotation direction of the printing raw material fixed on the rotating cylinder and read the reflected light. You. The sensor unit may be a magnetic sensor.

[0006]

[Function] A plurality of units are two-dimensionally formed by mounting and fixing means.
Print areas are arranged, and an identification pattern is printed in each unit print area.
The printing material being printed is accurately mounted and fixed on the cylindrical surface in alignment with the reference position . The identification pattern of each unit print area, the sensor unit and the printing material are relatively moved along the axial direction of the cylinder by the drive mechanism, and
By rotating the cylinder for each unit printing area, the sensor section
Are sequentially detected. Read this identification pattern
Is also an inspection of the accuracy of the printing position of the identification pattern. Then, a read signal from the sensor unit is output by the analysis output means.
The maximum and minimum values are calculated for
The identification pattern portion in each unit printing area of the printing blank and the mark
To be able to distinguish between the base material in each unit printing area of the printing material
The signal is analyzed. In this way, it is distinguished from the maximum and minimum
Because the pattern is distinguished from the ground, it is not affected by the ground
The identification pattern can be detected. Thereafter, the printing state of the identification pattern determined based on the evaluation algorithm is output for each unit printing area, and the printing state of the identification pattern is automatically inspected. Light is obliquely incident on the surface of the printing material at a desired angle to irradiate the identification pattern, and reflected light from the identification pattern is accurately read by the optical sensor. Inspection of the printing state of the identification pattern can also be performed by the magnetic sensor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which an optical sensor is used in a sensor section and a second embodiment in which a magnetic sensor is used in a sensor section will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing the entire configuration of the first embodiment, and a case C1 accommodating a vacuum pump (not shown).
Is a table surface, and a barcode inspection device A is installed on the table surface. A vacuum control device 11 is incorporated in the case C1, and a control panel 5 for operating the entire control is arranged on the front surface of the case C1 adjacent to the vacuum control device 11, and the vacuum control device 11 is driven and controlled. The foot switch 5B is connected to the side surface of the case C.

Work stage 2 of bar code inspection device A
A drum 27 having a columnar outer shape is rotatably attached to the drum 8 by a drum rotating device (not shown), and a measurement source set 25 to be inspected on the outer peripheral surface of the drum 27 is attached and fixed. A dryer 30 is fixed to the work stage 28 so as to face below the drum 27. A guide bar 7a is mounted near the upper surface of the drum 27, and a bar code scanner 15 is movably engaged with the guide bar 7a. It is movable in the axial direction of the drum 27 in close proximity to the anti-set 25. And, adjacent to the guide bar 7a,
An actuator 7 for moving the barcode scanner 15 in the axial direction of the drum 27 is attached.

FIG. 6A is a cross-sectional view perpendicular to the axis of the drum 27. As shown in FIG.
An insertion port 27a into which the leading end of the measurement raw material set 25 whose enlarged view is shown in FIG. This outlet 27
The distal end of the measurement raw material set 25 inserted until it comes into contact with the inner part of a is vacuum-sucked through the vacuum suction hole 271 by the vacuum pump housed in the case C1 and fixed. A plurality of pairs of vacuum suction holes 272a: 272b to 277a: 277
b is provided so that the raw material set 25 can be fixed to the rotating surface of the drum 27 through these vacuum suction holes while slowly rotating the drum 27.

An operation panel 5A for instructing an operation is provided on one side of the upper surface of the work stage 28, and a control circuit unit 10a and a CRT display device 21 are mounted on the upper part of the back work stage 28. A printer 24 is disposed on the side of the table surface of the case C1, and the control circuit 10a and the printer 24 are connected by a communication line W.
The control panel 5 and the control circuit unit 10a are connected so that signals can be transmitted and received. These control circuit unit 10a, control panel 5,
The operation panel 5A, the CRT display device 21, and the printer 24
The main part of the personal computer system 10 is constituted.

FIG. 2 is a block diagram showing the configuration of a personal computer system. A control panel 5 is connected to a CPU 1 via an input / output device 3 so that signals can be transmitted and received. , A drum rotation device 9 and a vacuum control device 11 are connected. Further, a bar code scanner 15 is connected to the CPU 1 via an amplifier circuit 17 and an AD converter 19, and furthermore, the CPU 1
Printer 24, CRT display device 21, and keyboard 23
Is connected. Although not shown, the personal computer system 10 further includes a floppy disk memory for storing measurement data, a ROM for storing various programs executed by the CPU 1, a RAM for temporarily storing measurement data, and the like. It is provided.

FIG. 5 is a circuit diagram of a bar code scanner portion. The scanner tip 15a includes an LED 31 for irradiating infrared rays to the bar code printed portion and a phototransistor 32 for receiving light reflected from the bar code printed portion. The power supply voltage V is supplied to the LED via the voltage adjustment circuit 15b.
The voltage is applied to the anode side of 31 and the collector of the phototransistor 32, and the cathode side of the LED 31 and the emitter of the phototransistor 32 are grounded via resistors. The emitter of the phototransistor 32 is
The non-inverting input terminal of the operational amplifier 17a is connected to the inverting input terminal of the operational amplifier 17a via the resistor 33.
The output terminal of the operational amplifier 17a is connected via a resistor 34 to the output terminal t0 of the device. A resistor 35 is connected between the non-inverting input terminal and the output terminal t0 of the operational amplifier 17a, and the operational amplifier uses the resistance value of the resistor 33, the resistance value of the resistor 34, and the resistance value of the resistor 35. Is set.

FIG. 3 is a plan view of a part of the measurement source set placed on the drum 27. In the embodiment, the measurement source set 25 is composed of 8 rows × 8 stages, a total of 64 card portions 25a. Each card portion 25a is provided with a barcode printing portion 252. These card portions 25a
Although the bar code is finally cut into 64 pieces, the bar code is checked before the card portion 25 a
5 is performed. The measurement material set 25 is wound around the peripheral surface of the drum 27 along the stopper plate 29 in a state where the vacuum control device 11 is in the vacuum-off state, and when the vacuum control device 11 is set to the vacuum-on state, the vacuum pump is used. Since the drum 27 is vacuum-suctioned, the vacuum suction holes 271 and 272a: 272b to 277
a: Suctioned at 277b and fixedly attached to the peripheral surface of the drum 27.

FIG. 4 is an explanatory view showing the arrangement relationship between the barcode of the measurement source set and the scanner. The scanner tip 15a is scanned with respect to the barcode of the barcode print portion 252, and the barcode is mistaken as a spot. It is necessary to detect without. For this purpose, based on experiments by the inventors, in the embodiment, the scanner tip 15a is set to irradiate infrared rays at an angle of 60 degrees with respect to the barcode surface and receive the reflected light.

By the way, the following processing programs are stored in the ROM of the CPU 1, and these programs are executed at the time of the barcode inspection operation, as described later. Table 1 Outline of Program Name Contents Origin Return Program A program for returning the barcode scanner 15 to the origin. A note type setting program. The CPU 1 is set via the keyboard 23 to the type of the measurement source set 25 and the printing process. Program Inspection program A program that measures the reflectance of the card part and displays the measurement results Standard deviation calculation program A program that calculates and displays the change over time of the standard deviation Calibration program The reflectance of the bars and spaces of the calibration source set A program that measures, displays, and calibrates the machine accuracy and the output of the barcode scanner 15. Data storage program A program that stores the measurement results obtained by inspection in floppy disk memory Data read program Reads and displays data from floppy disk memory Program data to be printed Program for program Vacuum control program Vacuum ON / OFF operation of the message display program messages output program various operation states of printing the program test data to the printer

The operation of the first embodiment will be described with reference to FIGS.
0 will be described. Here, FIG. 8 is a flowchart showing the overall operation of the first embodiment, FIG. 9 is a flowchart showing the details of the process of detecting the peak value from the read data of the bar code scanner, and FIG. 10 is the measurement of the first embodiment. FIG. 9 is an explanatory diagram illustrating a display example of a result. Step S1 The power of the barcode inspection device is turned on by the operator,
The bar code inspection device enters the power supply state,
By the message output program transferred to U1, C
A start message is displayed on the RT display device 21. Step S2 The CPU 1 drives the actuator 7 via the input / output device 3 and the control panel 5 based on the origin return program from the ROM, the bar code scanner 15 is positioned at the origin coordinate position, and when the positioning is completed, a message output program is executed. As a result, an end message is displayed on the CRT display device 21. Step S3 The CPU 1 drives the vacuum control device 11 via the input / output device 3 and the control panel 5 based on the vacuum control program from the ROM, and is set to the vacuum off state so that the vacuum suction holes 271 and 272a: 272b to
277a: Air flows in from 277b, and the vacuum state in the drum 27 is completely released. When the vacuum-off is completed, vacuum off message on the CRT display device 21 is displayed by the message output program.

Step S4 The operator winds the measurement source set 25 around the drum 27 along the stopper plate 29, performs positioning on the squeezing side, and mounts the measurement source set 25 on the drum 27 correctly. Step S5 to Step S7 When the operator completes the mounting of the raw material set 25 to the drum 27, the operator operates the operation panel 5A to instruct the drum to rotate, and the drum 27 starts to loosen, and FIG. The notch 27k forming the insertion port 27a shown in FIG.
8 until it contacts the stopper, and the notch 27k
When the drum 27 comes into contact with the stopper , the drum 27 stops, and the initial position is set. Then, when the operator operates the operation panel 5A to instruct vacuum-on, the suction holes of the drum 27 are sequentially vacuum-on, and the measurement material set 25 is fixed at a predetermined position on the drum 27, When the vacuum-on operation is completed, a vacuum-on message is displayed on the CRT display device 21 by the message output program. Steps S8 and S9 When the vacuum-on operation is completed and the measurement material set 25 is fixed at a predetermined position on the drum 27, the dryer 30 operates for a predetermined time to dry the print on the measurement material set 25. . Next, the scanner tip 15a of the barcode scanner 15 is correctly positioned at a predetermined position.

Step S10 The execution of the control program by the CPU 1 is in a standby state until the operator operates the inspection start switch of the operation panel 5A. When the operator operates the switch to enter the inspection start state, the CPU 1 executes the control program. The inspection program is started and executed based on the control program, and the bar code scanner 15 is activated.
Operation starts. Step S11, Step S12 The CPU 1 rotates the drum 27 at a constant speed based on the inspection program, drives the bar code scanner 15 positioned at the origin by driving the actuator 7, and
While moving the drum 27 in the axial direction (the direction of the arrow B1 in FIG. 3), the bar code print portion 252 is irradiated with infrared rays from the LED 31 and the reflected light is received by the phototransistor 32. At this time, a data storage program is started in the CPU 1, and the light receiving signal detected by the bar code scanner 15 via the AD converter 19 and amplified by the amplifier circuit 17 is continuously read and stored in the RAM. When the barcode scanner 15 reaches the last barcode printing portion 252 in the first row and the eighth column, the CPU 1 drives the drum rotating device 9 according to the inspection program, and the drum 27 is rotated in the direction of arrow A2 in FIG. The barcode scanner 15 is located on the barcode print portion 252 in the second row and the eighth column. From this state, the CPU 1 causes the actuator 7 to move the bar code scanner 15 according to the inspection program.
Is moved in the direction of arrow B2. In this way, the inspection is performed on all the barcode printing portions 252.

Steps S13 to S19 When the inspection of all the bar code print portions 252 is completed, the measurement results are displayed on the CRT display device 21 and printed on the printer 24 as described later. When the inspection is completed, the drum 27 is loosened and released from the set position, the scanner distal end 15a is released from the set position, and the vacuum-off state is sequentially set. When the vacuum-off state is completed, the measurement material set 25 is removed from the drum 27. The inspection is completed. In this way, the measurement data of the printing state of the barcode for the card portion 25a of the measurement source set 25 is stored in the RAM, and the data for each card is written to the floppy disk memory based on the data storage program.

Next, an operation of detecting a peak from read data of the bar code scanner according to the first embodiment will be described with reference to a flowchart of FIG. Step S21 Initial data setting immediately after power-on is performed, the current differential coefficient code M is set to positive (+), and the actual measurement maximum value detection flag MXFL is set.
Is set to “1”, the actually measured minimum value detection flag MNFL is set to “0”, and the number I of detected data is set to 1. Step S22: The detection imposition number C is set to 1. Step S23: Set the differential coefficient code MG of the measurement point immediately before to the smoothed differential code M. Step S24: Perform smoothing differentiation to calculate a smoothed differential coefficient code M.

Steps S25 and S26 The signs of the current differential coefficient code MG and the smoothed differential coefficient code M are checked. If the current differential coefficient code MG is positive (+) and the smoothed differential coefficient code M is negative (-), the process proceeds to step S27, where the current differential coefficient code MG is negative (-) and the smoothed differential coefficient code M is positive. In the case of (+), the process proceeds to step S31. Otherwise, the data detection index I is incremented by 1, the process proceeds to step S26, and the process of step S23 is performed again.

Steps S27 to S30 When the current differential coefficient MG is positive (+) and the smoothed differential coefficient M is negative (-), the actually measured maximum value is detected and the actually measured maximum value detection flag MXFL is set to 1. (Step S27). It is checked whether or not the maximum value MX is equal to or greater than the set threshold value. If not, the process returns to step S23 (step S28). When the measured maximum value MX is greater than or equal to the threshold,
The maximum value MX is stored in the RAM, and the maximum number of detection points MXP
T is increased by 1 (step S29). Then, the actually measured maximum value detection flag MXFL is set to “0” and the actually measured minimum detection flag MNFL is set to “1”, and the process proceeds to step S35.

Steps S31 to S34 If the current differential coefficient code MG is negative (-) and the smoothed differential coefficient code M is positive (+), it is determined that the actually measured minimum value has been detected and the actually measured minimum value detection flag MNFL is set to "1". (Step S3
1). It is checked whether or not the minimum value MN is equal to or smaller than the set threshold value. If not, the process returns to step S23 (step S32). If the measured minimum value MN is equal to or smaller than the threshold value, the minimum value MN is stored in the RAM, and the minimum value detection point MNPT is increased by 1 (step S3).
3). Then, the measured maximum value detection flag MXFL is set to "1", and the measured minimum value detection flag MNFL is set to "0", and the process proceeds to step S35.

Step S35 It is checked whether or not the maximum value detection point MXPT has reached the maximum value, for example, 20. If the determination is YES, the process proceeds to step S37. If the determination is NO, the process proceeds to step S37.
The process moves to the process of 36. Step S36, Step S39 If the detected data index I is equal to the preset maximum value IM
Check if it is less than AX (for example, 850). If the detection data index I is less than IMAX, the process proceeds to step S39, where the detection data index I is
The number of smoothing differential points is increased by Q, and if the detection data index I is not less than IMAX, the process proceeds to step S36. Step S37, Step S40 It is checked whether or not the detected number C of the peak surface is less than 8 (Step S37). If YES, the detected number C of the peak surface is increased by 1 (Step S40). Step S38: When the number of peaks C detected reaches eight, the peak has been reached, and the peak detection ends.

The calculation of the maximum value and the minimum value regarding the reflectance is performed by the bar code printing portion 252 of the measurement source set 25.
Is performed on the base on which the barcode is not printed. FIG. 10 is an explanatory diagram showing a part of the detection results displayed on the CRT device 21 based on the waveform display program. In FIG. 10, the inspection results of the printing status of up to four rows for each row in the horizontal direction are shown. is there. In the same figure, the row of the upper cross mark shows the measured value (%) of the reflectance of the base, and the lower row of the cross mark shows the measured value (%) of the reflectance in the bar code.
, And the vertical length of the cross mark indicates a variation in measurement. Numbers shown in each column, for example, 31 and 3 in the first column
Is the average value 31 of the background reflectance and the average value 3 of the barcode reflectance, and the previous measured value and the current measured value are displayed in a comparative manner. In this case, the reflectance of the background is displayed in dark orange and the reflectance of the barcode is displayed in yellow for easy confirmation, and the tolerance band is displayed at the same time.

In this manner, the average value of the background reflectance and the average value of the barcode reflectance of the 64 card portions are:
Since the barcode is simultaneously displayed on the CRT display device 21, the printing state of the barcode is entirely confirmed before cutting, and it is easy to determine whether or not the barcode is within the allowable band. In this case, since the data can always be compared with the previous data, it is possible to correctly determine the operation state of the printing press, and to check the printing state of the barcode of the measurement source set 25 in consideration of the reflectance of the base. Can be determined with high accuracy.
In addition, since the appropriateness of the printed state of the printed barcode is determined with reference to the reflectance of the base, it is possible to inspect even if the barcode of each card part is different without depending on the pattern of the barcode itself. is there. The measuring material set 25 is easily mounted on the drum 27 by vacuum suction, and the mounting is released. Therefore, the mounting and releasing operations are easily performed, the mounting is performed firmly, and the barcode scanner 15 is mounted. No misalignment occurs during operation.

FIG. 7 is a perspective view showing the structure of the main part of the second embodiment.
A magnetic barcode is formed, and as a barcode scanner 15, as shown in FIG.
Is the bar code printed portion 2 of each row of the measurement raw material set 25
Those arranged corresponding to 52 are used. The bar code scanner 15 is adjusted by a ball screw driven by a motor 47 along a linear guide 46 provided on a work stage of a bar code inspection apparatus, and is adjusted and moved with respect to a measurement material set mounted on a drum. MR on anti-set
The inspection is performed with the sensor 45 brought into the proximity state so as not to contact.

In the second embodiment, the barcode scanner 15A thus adjusted in position is fixed, and the rotation of the drum causes the barcode printing portion 25 of each row to rotate.
Inspection in each stage direction is sequentially performed while performing the inspections 2 simultaneously. Therefore, in the second embodiment, the actuator 7 in the first embodiment becomes unnecessary, and the personal computer system 10 is partially changed. However, the configuration of the other parts in the second embodiment is the same as that of the first embodiment. This is the same as the embodiment.

In the second embodiment, each bar code printing portion 252 in the column direction is provided with a plurality of M
Inspection is performed simultaneously by the R sensor, the printing state of the magnetic bar code is detected by the MR sensor, and a detected electric signal is obtained from the MR sensor.
This is performed in the same manner as in the embodiment. In the second embodiment, the same effects as those of the first embodiment described above are obtained, and
In this embodiment, since the operation of the actuator 7A is unnecessary, the inspection time is greatly reduced. In addition, by replacing the sensor head unit (45A) in which a plurality of MR sensors are arranged at an arbitrary pitch, it is possible to inspect various types of printing material.

[0030]

As described above, according to the present invention, a printing material having a two-dimensionally imprinted unit printing area on a cylindrical surface and having an identification pattern printed thereon, Inspection of the identification patterns with high accuracy and efficiency, and based on the signals obtained in the inspection, the printing status of many identification patterns is quantitatively analyzed and displayed. It is possible to take appropriate measures.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a personal computer system according to the first embodiment of the present invention.

FIG. 3 is a plan view of a part of a raw material set mounted on a drum according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an arrangement relationship between a barcode and a scanner of the measurement original set according to the first embodiment of the present invention.

FIG. 5 is a circuit diagram of a bar code scanner according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view perpendicular to the axis of the drum according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a configuration of a main part of a second embodiment of the present invention.

FIG. 8 is a flowchart showing the overall operation of the first embodiment of the present invention.

FIG. 9 is a flowchart illustrating a peak detection processing operation from read data of the barcode scanner according to the first embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a part of a detection result displayed on the CRT device according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 5 Control panel 5A Operation panel 7 Actuator 9 Drum rotation device 10 Microcomputer system 10a Control circuit unit 11 Vacuum control device 21 CRT display device 24 Printer 25 Measurement material set 27 Drum 30 Dryer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B41F 33/14 B41M 3/00 G01N 21/84-21/958

Claims (5)

(57) [Claims] 1. An end of a printing substrate in which a plurality of unit printing areas on which an identification pattern is printed is provided at a reference position.
Side by side and removably mounted and fixed on the cylindrical surface, the length of each unit printing area of the measurement raw material in the rotation direction of the cylinder.
A rotary attachment / fixing means for rotating the cylinder in response to the sensor; a sensor unit for reading an identification pattern printed on each unit printing area of the printing material; and rotating the sensor unit and the measurement material. On a cylinder
The cylinder of the printing raw material fixed and aligned.
Identification pattern in each unit print area arranged in the axis direction of
And a driving mechanism for relatively moving the printing unit in accordance with the scanning position, and calculating a maximum value and a minimum value for a read signal for the unit printing area from the sensor unit.
The identification pattern portion in each unit printing area of the printing blank and the mark
To be able to distinguish between the base material in each unit printing area of the printing material
Analyzes the signal and evaluates it for each printing area
An analysis output unit that outputs a printing state of the identification pattern determined based on the algorithm . 2. The apparatus according to claim 1, wherein the identification pattern is a bar code. 3. An apparatus according to claim 1, wherein the unit print area corresponds to one card or certificate. 4. An optical system in which the sensor section irradiates a light beam at an angle with respect to a plane in a direction perpendicular to the rotation direction of the printing material fixed on the rotating cylinder, and reads the reflected light. The printing material web inspection apparatus according to any one of claims 1 to 3, wherein the apparatus is a sensor. 5. The apparatus according to claim 1, wherein the sensor is a magnetic sensor.