JP2000168217A - Apparatus and method for deciding base sheet of stencil printer and master roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide all master rolls usable as a master roll of a non-genuine product according to a user's decision without making the rolls unusable in the case of non-genuine product by at least recognizing whether using master roll is a genuine or non-genuine product. SOLUTION: Optical information indicating a maker code and a base sheet type code is given to a master roll, read by a reflection sensor 32, and whether the roll is a conformable master roll or not is decided based on the information. In the case of deciding a non-conformable master roll, an error is displayed to call user's attention. Second or following error detections can be avoided by user's judgment. In the case of deciding the conformable master roll, re- execution of a procedure of the processing sequence after the deciding is stopped, end mark information given to the roll is sensed, replaced with a novel master rill, and a decision of whether the roll is conformable or not is restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine stencil discriminating apparatus, a discriminating method and a master roll, and more particularly to a stencil discriminating apparatus and discriminating method for using a master roll suitable for a printing press, and a master roll. About.

[0002]

2. Description of the Related Art Generally, in a stencil printing machine, various base papers are used according to the grade of the printing press. A master roll wound around a tubular core material is mounted for each base paper. Is pulled out and sent to the plate making section.

For example, the resolution of a print image is 400d
There are two types of printing machines, one for pi and the other for 600 dpi, and base paper should be used according to each model grade.
In particular, when a 400 dpi base paper master roll is used for a 600 dpi printing machine, a clear original print image cannot be guaranteed. Conversely, when a 600 dpi base paper master roll is used for a 400 dpi printing machine, a 600 dpi base paper is currently used. Is thinner than that for 400 dpi, which is likely to cause inconveniences such as wrinkles when the base paper is fed. Further, some inexpensive non-genuine master rolls, which are so-called pirated copies, are inferior and contain many impurities, and may have various adverse effects on the printing press in use.

In order to avoid the above-mentioned disadvantages,
It is recommended to use genuine master rolls specified as compatible with each printing press. However, it is good if the user can reliably discriminate genuine products from non-genuine products or inferior products.However, if used carelessly, the conventional printing press should reliably identify the master roll. Could not.

On the user side, there is a demand that it is desirable to use a master roll having the same quality even if it is not a genuine product, and it is also acceptable to use only a genuine product. Sometimes lacks gender.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. Therefore, an object of the present invention is to allow a user to at least recognize whether or not a master roll in use is a genuine product, and to disable all master rolls unless a non-genuine product is used. In other words, a non-genuine master roll can be used at the user's discretion.

[0007]

SUMMARY OF THE INVENTION A stencil discriminating apparatus for a stencil printing machine according to the present invention provides a stencil printing machine with a master roll provided with information indicating that the stencil is applicable to a specific type of printing machine. , And is configured to determine whether or not the master roll is suitable for the printing press based on the information read by the reading unit.

In the base paper discriminating apparatus, the information is preferably optical information indicating at least one of a maker of the master roll and a type of the base paper. Also,
It is also preferable that optical information of the end mark is further added to the rear end.

[0009] In the base paper discriminating apparatus, it is preferable that the reading means reads both optical information indicating at least one of a maker of the master roll and a type of the base paper and the end mark information.

Further, in the above-mentioned stencil discriminating apparatus, it is preferable that the reading means is disposed immediately below the master roll.

The master roll may be moved in accordance with the reduction in diameter due to consumption of the base paper, and the reading means may be moved so as to follow the movement of the master roll.

Further, in the method of discriminating a stencil printing machine according to the present invention, the above-mentioned stencil discriminating apparatus is used to determine the master roll based on at least one of the manufacturer and the type of the stencil based on optical information. It is determined whether or not the master roll is suitable for the printing press, and when it is determined that the master roll is suitable, the re-execution of the determination procedure after the procedure in which the determination was performed is stopped, and the After detecting the end mark information, it is replaced with a new master roll, and the above-mentioned suitability determination is restarted.

[0013] In the base paper discriminating method, the master roll is discriminated as to whether it is a master roll suitable for the printing machine based on optical information indicating at least one of a maker and a type of base paper. If the roll is not a roll, it is preferable to display an error and prohibit the plate making operation.

In the method of discriminating a stencil sheet, it is preferable that the error display and the prohibition of plate making operation are released by opening and closing a cover member for covering the plate making portion.

In the method of discriminating the base paper, at least optical information indicating either the maker or the type of the base paper is provided at a prescribed position on the leading end of the base paper, and an end mark is provided at a prescribed position on the end of the base paper. Stipulates that the master roll is a genuine product, and for the above master roll, when detecting at least the first nonconformity of either the manufacturer or the base paper type, displays an error as a non-genuine product and prohibits plate making, When the incompatibility is detected after the second time, it is preferable to avoid the error display and to allow the stencil making until the end mark is detected.

In the method of discriminating the base paper, it is preferable to use a master roll in which the display length of the optical information indicating the maker of the master roll and the type of the base paper is sufficiently shorter than one circumference of the master roll.

The base paper discriminating method stores the number of times the conforming master roll has been used and the number of times the non-conforming master roll has been used, based on whether the master roll is suitable or not.
It is preferable that the reading of the stored data can be performed only by the operation in the serviceman mode. Here, the “number of uses” may be the number of master rolls used or the number of times of master making in each master roll.

In the master roll according to the present invention, information indicating that the roll is a plate making stencil paper applicable to a specific type of printing press is added to a specified position on the stencil leading end side, and the stencil paper is added to a specified position on the base paper end side Termination information is provided.

The information indicating that the master roll is a roll of stencil making paper applicable to the printing machine of the specific model is optical information indicating at least one of a maker of the master roll and a type of stencil. Is preferred.

In the master roll, the information given to the specified position on the base paper leading end side and the information given to the specified position on the base paper end side are arranged on the same line along the longitudinal direction of the base paper, Further, the information is preferably information that can be read by one reading unit.

[0021] In the master roll, it is preferable that all of the information is provided outside the plate area.

It is preferable that the display length of the optical information indicating the manufacturer and the type of the base paper of the master roll is sufficiently shorter than one circumference of the master roll.

[0023]

1 and 2 show a schematic configuration of a housing for holding a master roll in a stencil printing machine according to the present invention. As shown in FIG. 1, the housing 10 includes a front wall 11, a rear wall 12, a bottom wall 13 and a side wall 14, and is formed in a substantially rectangular parallelepiped open box shape. As shown in FIG. 2, the master roll 15 is
The base paper 16 is inserted from above into the inside of the front wall 11, pulled out from the rear wall 12 side, and sent forward (to the right in the figure) beyond the upper end of the front wall 11. The front wall 11 is fixed and the base paper 16
Is pulled forward, the master roll 15 hits the front wall 11 and is stopped.

Although not shown, the base paper 16 pulled out from the master roll 15 is set so as to be passed through a plate making section including a thermal head and a platen roller. The plate making part is covered with an upper cover above,
When an error occurs in setting the base paper, the upper cover is opened and processing operations such as inspection and replacement of the master roll are performed.

The rear wall 12, the bottom wall 13 and the side wall 14 are integrally formed, and are urged forward by a coil spring 17 below the bottom wall 13. Therefore, even if the remaining amount of the base paper of the master roll 15 in the casing 10 is reduced and the roll diameter is reduced, the rear wall 12 can move the master roll to the front wall 1
1 to stabilize the attitude of the master roll in the housing. The rear wall 12, the bottom wall 13, and the side wall 14, which are integrally configured to be movable in the front-rear direction with respect to the fixed front wall 11, have a rear configuration. The movement of the rear portion in the front-rear direction is guided by fitting a slider 19 projecting below the bottom wall 13 into a guide shaft 18 extending rearward from the lower end of the front wall 11.

Code information as shown in FIG. 3 is written on the master roll 15 at a position outside the area where the plate is made from the beginning of the base paper, usually within the fifth plate. According to this code information, the maker of the master roll as a genuine product and the type of base paper are displayed. In this example, the 3-bit code at the leading end is the manufacturer code, and a 5-bit type code is shown with a space. The information is the simplest and most accurate information that can be read optically, but it is also possible to use magnetic information or mechanically read information such as a punched hole pattern. The content of the information may be only one of these two types of code information, or a code indicating other information may be added or the information content may be changed. The display length of this information code is sufficiently shorter than one circumference of the master roll 15, and when the sensor 32 is located at the front and reads this information, the overlapped portion of the wound semi-transparent base paper is used. There is no overlap. The reason that the code information is not provided in the first edition is that the user often fails when setting the base paper. It is for reading. Although not shown, the last part of the base paper contains an end mark code for indicating that the base paper has run out and needs to be replaced. Since these pieces of code information are all read by the reflection sensor 32, they are arranged on the same straight line along the longitudinal side edge of the base paper wound around the core, and are drawn with the same or the same mark paint. Therefore, only one sensor is required to read such information.

Below the housing 10, a device for optically reading the above-mentioned data code attached to the master roll 15 is provided. FIG.
0 shows the configuration as viewed from below. Reading information on the master roll 15 at this position can obtain information more quickly than, for example, reading in the middle of the transport path of the base paper pulled out from the roll and fed. This is the selection of the position where the timing can be made earliest. Although not shown in FIGS. 1 and 2, one plate 20 is provided below the bottom wall 13 of the housing 10, and the device shown in FIG. Are located.

In the center of the plate 20, two sliders 19 projecting from the bottom wall 13 of the housing 10 to the bottom of the plate 20 are cut out so as to be slidable along the guide shaft 18 to form an opening 21. . At both ends of the plate 20, a locking portion 23 of the coil spring 17 protruding below the plate 20 from the bottom wall 13 of the housing 10 is cut out to form an opening 22 so as to be movable. A rack 26 is attached to the slider 19, and moves in the front-rear direction as the rear configuration of the housing 10 moves. Plate 20 contains
A gear 27 meshing with the rack 26 is rotatably mounted. A pin 28 is implanted in the gear 27, and a rotatable lever member 30 having an elongated hole 29 with which the pin 28 is engaged is attached to the plate 20. A sensor board 31 is attached to the tip of the lever member 30, and a reflection sensor 32 is attached to the center of the sensor board 31. An opening 33 is formed at a position where the plate 20 faces the sensor. Reference numeral 34 shown in FIG. 1 is a window for the reflection sensor 32 which is notched and opened in the bottom wall 13 of the housing 10.

The state shown in FIG.
This is the state when 0 is empty and the new master roll 1
When 5 is inserted, the slider 19 moves to the guide shaft 18.
Slide up and move down in the figure. During this movement, the rack 26 attached to the slider 19 rotates the gear 27 in the clockwise direction in the figure, and the lever member 30 moves to the position shown by the one-dot chain line in the figure due to the engagement between the pin 28 and the elongated hole 29. I do. At this position, the sensor 32 is located almost directly below the center of the master roll 15, and can read the maker code and the type code at a position almost directly in front. In addition, the diameter of the master roll 15 decreases as the base paper is consumed, and the housing 10 moves forward by the elastic force of the coil spring 17. The rack 26 attached to the slider 19 also moves forward (upward in the figure) with the movement of the housing, and moves the sensor 32 forward with the rotation of the gear 27 and the lever member 30. Eventually, when the diameter of the core of the master roll 15 becomes substantially the center, the sensor 32 can read the end mark code at a position directly in front of the sensor 32 at a substantially central position thereof. Further, even if the master roll 15 which is merely inserted into the housing 10 is reduced in diameter as the base paper is consumed as shown in FIGS. The code information to be read by the sensor 32 is always at a substantially constant distance from the sensor at a position facing the sensor 32 because the code information is kept in contact with the sensor 13. Therefore, since the optical positional relationship is always kept constant despite having a simple structure, sufficient reading accuracy can be stably obtained.

The reading of the maker code and the type code confirms that a proper master roll suitable for the type of the printing press is used. If a non-conforming master roll is used, it may cause unexpected failure or inconvenience.Check that the proper master roll is used to prevent such a problem. If not, it is intended to alert the user by displaying an error or the like. These pieces of information obtained by the sensor 32 are represented by C
The processing is performed by a PU (not shown), and the feeding operation of the base paper and the plate making operation are controlled. Hereinafter, the processing procedure for checking the type of the master role will be described with reference to the flowcharts of FIGS.

In the first step # 10 of the processing procedure, it is confirmed that plate making has been started, that is, that a command for plate making has been issued. If it has been started, the process proceeds to step # 11, and it is determined whether or not to execute a reading mode for reading the following maker code or type code by the sensor 32. This determination is made by checking whether the reading mode stop flag is set. The read mode stop flag indicates that the master roll currently mounted is determined to be a conforming master roll, and then the master roll is replaced, that is, the end mark of the master roll is detected. The reading mode is stopped until a new master roll is mounted. This is because when the master roll determined to be a conforming master encounters an error such as wrinkles during base paper feeding, apart from the problem of non-conformity of the base paper, open and close the upper cover for maintenance work. Even if this is done (as will be described later with reference to FIG. 8, when the upper cover is opened and closed, step # 16 is performed).
The master matching flag is reset at 2), so that the subsequent reading mode is not repeated for the same master roll each time. The setting of the read mode stop flag is performed subsequent to the setting of the master matching flag described later. Thus, this step #
If the read mode stop flag is set at 11,
The processing procedure of the master type check ends without executing the reading mode after step # 12. Also,
If the read mode stop flag has not been set in step # 11, the process proceeds to step # 12. Step #
At 12, it is checked whether or not the master roll compatibility flag has already been set in the plate making procedure one plate before. That is, it is determined whether or not it has been determined in step # 17 and step # 18 described later that the master roll is suitable for the printing press. If the master matching flag has already been set, there is no need to perform a further type check, and the procedure ends.

This determination of conformity is made after the reflection sensor 32 reads the maker code and type code of the master roll.
Normally, the number is up to the fifth edition, so that the first several editions are always negative in step # 12.
Therefore, the first few plates will be printed with or without matching. The version number A is counted until the master matching flag is set, and the version number counter is updated by one in step # 13.

When the version number counter is updated, step #
It is asked at 14 whether or not the sensor 32 has detected the maker code. If not, the process proceeds to step # 110. In step # 110, it is determined whether or not the current version number A is larger than a predetermined number N. For example, if these information codes are not attached, not the genuine master roll, the version number A becomes larger than the set number N, and it is detected that the product is not a genuine product. can do.

If the version number A has not reached the predetermined number N, the process proceeds to step # 111. Step # 111
Then, it is determined whether or not the plate making has been completed, and if it has been completed, the type check processing is terminated. If the plate making has not been completed, the process returns to step # 14, and the steps # 14, # 110 and # 111 are repeated until the plate making is completed or a maker code is detected in step # 14.

When the maker code is detected in step # 14, the process proceeds to step # 15. In step # 15,
It is determined whether a space between the maker code and the type code has been detected. Whether or not a space is detected is determined by detecting that the space has ended within a predetermined check time Ta from the end of the maker code. Until the check time Ta has elapsed and while the end of the space has not been detected, the determination in step # 15 is negative, and the process proceeds to step # 120. In step # 120, it is determined whether or not the set check time Ta has elapsed. Check time T without detecting the end of space
When a has elapsed, it is detected that the master roll is not a genuine product, and an error message is displayed to allow replacement.
During the check time Ta, the processes of step # 15 and step # 120 are alternately repeated until the end of the space is detected. If the end of the space is detected within the check time Ta and it is determined that the space is detected in step # 15, the process proceeds to step # 16.

In step # 16, it is determined whether a type code has been detected. Whether the type code is detected
The determination is made by detecting that the type code has ended within a predetermined check time Tb from the end of the space. Until the check time Tb elapses, and while the end of the type code is not detected, the determination in step # 16 is negative and the process proceeds to step # 130. In step # 130, it is determined whether or not the set check time Tb has elapsed. If the check time Tb has elapsed without detecting the end of the type code, it is detected that the master roll is not a genuine product, and an error message is displayed to allow replacement. During the check time Tb, the processes of step # 16 and step # 130 are alternately repeated until the end of the type code is detected. If the end of the type code is detected within the check time Tb and it is determined in step # 16 that the type code has been detected, the process proceeds to step # 17.

In step # 17, it is determined whether or not the master roll is suitable for the model of the printing press based on the detected type code. If not, an error message is displayed to prompt the exchange of the master roll. If they match, move to step # 18 and set the master roll matching flag.
Then, the process proceeds to step # 19 to set the above-described read mode stop flag, and further proceeds to step # 20.
In step # 20, the counter that counts the number of errors B is reset, and in this step the type check processing procedure ends. The number of errors B is counted when an error is determined in each of the above steps # 17, # 110, # 120, and # 130.

Next, the procedure of the error processing will be described with reference to FIG. Steps # 17, # 110, # 120 in the process of checking the type of the master role,
When an error is determined in # 130, this error processing is performed. When entering error processing, first, step #
In step 140, the number of errors B is updated by one, and step # 1
It moves to 41.

In this error processing, the processing procedure is distinguished depending on whether the error is the first error after setting a new master roll or the second or subsequent error. In step # 141, the number of errors B is 1
Is determined. If B = 1, the process proceeds to step # 142 to display an error. This display is made on a display panel such as an operation panel. Then step # 1
At 43, a flag for stopping the plate making operation is set. The user opens and inspects the upper cover of the plate making unit described above, performs an adjustment process as appropriate, and when the trouble is eliminated, closes the upper cover again to continue the plate making operation. In response to the user's work, it is detected in step # 144 that the upper cover has been opened, and in step # 145, it is detected that the upper cover has been closed again, and the process proceeds to the next step # 146. These detections can be performed with a microswitch. When the upper cover is closed, the error display is cleared in step # 146. Further, in step # 147, the stencil making operation is allowed to be continued by resetting the stencil making impossible flag, and the error processing ends.

For example, if the master roll is not a genuine product and does not have a specified maker code, space, and type code, and is of a quality that can be used equivalently to a genuine product, the user can use the genuine product master roll. By opening and closing the upper cover irrespective of the error display without replacement, the master roll can be used continuously. As described above, in order to make use of the flexibility of using the master roll, the error processing may be completed in steps # 150 and # 151. If the number of errors B is 2 or more in step # 141, step # 141
Then, the process goes to step # 150 to forcibly set the master matching flag, and further resets the error counter in step # 151. As described above, when it is determined that the master roll is usable by the user when the first error display appears, if the upper cover is opened and closed without performing the adjustment processing operation, step # is performed in the second error processing. Error processing is performed by performing the processing of 150 and # 151, and no error display is performed.

Incidentally, the opening / closing operation of the upper cover monitored in steps # 144 and # 145 is also performed when the master roll is replaced. For example, if the sensor 32 detects the end mark code because the remaining amount of base paper in the master roll is low, the user replaces the master roll with a new one and opens and closes the upper cover regardless of error processing (step # 160, # 161). At this time, the master matching flag and the version number counter are reset to initialize (steps # 162 and # 163). This process is an open / close check of the upper cover shown in the flowchart of FIG. 8, and is also executed when the upper cover is opened / closed in the error process of FIG. 7, and the master compatible flag and the version number counter are reset. .

The end mark reading process shown in the flowchart of FIG. 9 starts at the same time as determining whether or not plate making has been started in the first step # 10 of the master type check process, and is executed in parallel. That is, it is determined whether or not plate making has been started in step # 100, and when plate making is started, it is always monitored whether or not an end mark has been detected (step # 101). Step #
When the end mark is detected in step 101, the process proceeds to step # 102, where the read mode stop flag is reset, and this processing is terminated, to prepare for the master type check processing for a newly exchanged master roll.

In performing the above control, for example, the number of times the master conformity flag is set can be used as the number of conforming master rolls used, and conversely, the number of errors can be used as the number of non-conforming master rolls used. .
Alternatively, the total number of editions from the setting of the master roll to the detection of the conformance flag is defined as the number of plate making operations by the conforming master roll, and the number of editions from the setting of the master roll to the detection of an error is defined as the non-conforming master The number of times of plate making by a roll can be used. If these usage count data is stored in the non-volatile memory and can be checked in the serviceman mode, it can contribute to appropriate determination of the cause of the failure in the event of a failure such as a printing press failure, Appropriate repair actions and appropriate usage advice to the user can be provided. Switching between the serviceman mode and the normal user mode is performed, for example, by turning off the apparatus power once and then turning on the apparatus power again while pressing a predetermined button on the operation panel.
Can be switched from the normal user mode to the serviceman mode. Further, if the power of the apparatus is once turned off and then turned on again without pressing the button on the operation panel, the control program is switched from the serviceman mode to the normal user mode.

[0044]

As described above, according to the present invention, a user can reliably recognize whether or not a master roll of base paper suitable for a printing press to be used is used, and a printed product caused by a master roll incompatibility. The printing press itself can be maintained in a good state without lowering the position. Moreover, not only the genuine product master roll is not accepted, but when the user determines that the master roll is equivalent to the genuine product, the use thereof can be permitted with a simple operation without complicated operations. Become like Further, in a base paper supply device that holds the master roll in a housing, even if the axis of the master roll moves as the base paper is consumed, optical information on the base paper can be read at an appropriate position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a housing in a stencil feeding device of a stencil printing machine according to the present invention.

FIG. 2 is a perspective view showing a state in which a master roll is mounted on the housing of FIG.

FIG. 3 is a perspective view showing optical information given to a master roll.

FIG. 4 is a bottom view showing a schematic configuration of a sensor moving mechanism in the stencil discriminating apparatus of the stencil printing machine according to the present invention.

FIG. 5 is a first half of a flowchart showing a processing procedure of a master type check;

FIG. 6 is a second half of the flowchart of FIG. 5;

FIG. 7 is a flowchart showing an error processing procedure in a master type check.

FIG. 8 is a flowchart illustrating a procedure of an upper cover opening / closing check process.

FIG. 9 is a flowchart showing a procedure for reading an end mark.

FIG. 10 is an explanatory diagram showing a state in which a new master roll is held in a housing.

FIG. 11 is an explanatory view showing a state in which the master roll in the housing has almost completely used up the base paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Case 11 Front wall 12 Rear wall 13 Bottom wall 14 Side wall 15 Master roll 16 Base paper 17 Coil spring 18 Guide shaft 19 Slider 20 Plate 21 Opening 22 Opening 23 Locking part 26 Rack 27 Gear 28 Pin 29 Elongated hole 30 Lever member 31 Sensor board 32 Reflection sensor 33 Opening 34 Window

Claims (17)

[Claims] 1. A master roll (1) provided with information indicating that it is a stencil sheet applicable to a specific type of printing press.
5) a reading means (32) for reading the information;
A stencil printing machine discriminating apparatus for discriminating whether or not the master roll is suitable for the printing press based on information read by the reading means. 2. A base paper discriminating apparatus according to claim 1, wherein said information is optical information indicating at least one of a maker of said master roll and a type of base paper. 3. The base paper discriminating apparatus according to claim 2, wherein the master roll is further provided with optical information of an end mark at a rear end portion. 4. The base paper according to claim 3, wherein the reading means (32) reads both the end mark information and optical information indicating at least one of a maker of the master roll (15) and a type of the base paper. Discriminator. 5. A base paper discriminating apparatus according to claim 1, wherein said reading means is disposed immediately below a master roll. 6. The master roll according to claim 1, wherein the master roll moves with a diameter reduction due to consumption of the base paper, and the reading means moves following the movement of the master roll. Base paper discriminator. 7. A master roll adapted to the printing machine based on optical information indicating at least one of a maker and a type of base paper, using the base paper discriminating apparatus according to claim 2. It is determined whether or not it is a conforming master role.If it is determined that the master role is determined, the re-execution of the determination procedure after the procedure of performing the determination is stopped, and after detecting the end mark information assigned to the master role,
A method for discriminating a stencil printing press, wherein the discriminating process is restarted by replacing the disc with a new master roll. 8. The master roll (15),
Based on the optical information indicating at least one of the manufacturer and the type of base paper, it is determined whether the master roll is suitable for the printing press. If the master roll is not suitable, an error message is displayed and the plate making operation is prohibited. 8. The method for determining a base paper according to claim 7, wherein: 9. The above error display and plate making operation prohibition are
The method according to claim 7, wherein the release is performed by opening and closing a cover member that covers the plate making unit. 10. A master roll in which at least optical information indicating either the maker or the type of base paper is provided at a prescribed position on the leading end side of the base paper and an end mark is provided at a prescribed position on the end side of the base paper. If the master roll is detected as non-compliant with at least one of the maker and base paper types for the first time, an error message is displayed as a non-genuine product, platemaking is prohibited, and 8. The method according to claim 7, wherein when the inconsistency is detected, an error display is avoided and plate making is permitted until the end mark is detected. 11. The method of claim 7, wherein the display length of the optical information indicating the maker of the master roll and the type of the base paper is sufficiently shorter than one circumference of the master roll. 12. The number of times of use of a conforming master role and the number of times of use of a non-conforming master role are stored based on the determination as to whether or not the master role is compatible, and the stored data is read out by operating in a serviceman mode. 8. The method according to claim 7, wherein the method can only be performed. 13. Information that a roll of stencil making paper applicable to a specific type of printing press is provided at a prescribed position on the leading end side of the stencil paper, and that the end of stencil information is provided at a prescribed position on the ending side of the stencil paper. A master roll characterized by having 14. The information indicating that the roll of stencil making paper applicable to the printing machine of the specific model is optical information indicating at least one of a maker of the master roll (15) and a type of stencil. A master roll according to claim 13. 15. The information provided at the specified position on the leading end side of the base paper and the information provided at the specified position on the base end side of the base paper are arranged on the same line along the longitudinal direction of the base paper, and 14. The master roll according to claim 13, which is information readable by a reading means (32). 16. The master roll according to claim 13, wherein all of the information is provided outside the plate area. 17. The master roll according to claim 13, wherein the display length of the optical information indicating the maker of the master roll and the type of the base paper is sufficiently shorter than one circumference of the master roll.