JP4632484B2 - Stencil printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stencil printing apparatus that performs printing by winding a master (stencil sheet) around an outer peripheral surface of a plate cylinder.
[0002]
[Prior art]
In a stencil printing apparatus, a master that has been perforated and made by a heating means such as a thermal head is wound around the outer peripheral surface of a porous structure of a plate cylinder, and a printing cylinder sent from a paper feeding means is pressed by a press roller as a pressing member. Printing is performed by pressing on the outer peripheral surface.
The ink supplied to the inside of the plate cylinder oozes through the opening portion of the plate cylinder and the perforated portion of the master by the pressing force of the press roller, and is transferred to the printing paper to form an ink image. .
[0003]
Master making is performed with a plate making unit that can be attached to and detached from the main body of the machine. If the master runs out, the plate making unit is taken out of the main body of the machine, and after replacing the master, the plate making unit is attached to the main body of the machine. ing.
When the printing of a predetermined number of sheets on one plate is completed, the used master is peeled from the plate cylinder by the plate discharging means.
[0004]
As shown in FIG. 7, the plate-making unit includes a roll-shaped master 100, a master set roller 102 and a set plate 104 for setting the leading end of the master 100 to be able to be fed out when a new master 100 is replaced, and an image signal. A thermal head 106 having a heating element that selectively generates heat based on the platen, a platen roller 108 that presses and transports the master 100 to the thermal head 106, a transport roller pair 110, and a position at a predetermined length of the master 100. It has a cutter 112 that cuts at a position corresponding to the length of one plate, a pair of conveying rollers 114, a bending box 116 that temporarily stores the master 100 that has been subjected to plate making in a plate-feed standby state, and the like. The bending box 116 is provided with a guide plate 116a that is selectively set at a position where the master 100 is conveyed (position indicated by a two-dot chain line) and a position where the master 100 is accommodated (position indicated by a solid line).
Further, a master presence / absence sensor 118 for detecting the presence / absence of the master 100, a master set sensor 120 as a master set detection means for detecting whether or not the master 100 is at the set position, and a tip of the master 100 are detected. A master tip detection sensor 122 is provided.
[0005]
After the new master 100 is set in the plate making unit, when the plate making unit is mounted on the apparatus main body, the mounting switch is turned on, and the leading end of the master 100 is sent by the master set roller 102, the platen roller 108, and the conveying roller pair 110 to detect the master leading end. After the front end of the master 100 is detected by the sensor 122, the operation is stopped after a predetermined distance. This operation is called master autoloading, and is automatically performed when the plate making unit is attached to the apparatus main body. In this master auto-loading, the thermal head 106 is not driven, and the master 100 is sent in a plate-free state.
If the master set sensor 120 is not turned on when the master 100 is replaced and the plate making unit is mounted on the apparatus main body, it is determined that the master is set incorrectly. Further, if the master tip detection sensor 122 is not turned on when a predetermined time has elapsed after the plate making unit is mounted on the apparatus main body, it is determined that the master misfeed in the master auto loading.
[0006]
The master 100 that has been subjected to plate making is accommodated in a flexure box 116 and cut by a cutter 112 at a position corresponding to the length of one plate. The master 100 accommodated in the bending box 116 is transported by a pair of transport rollers 114 that are rotationally driven in accordance with the opening / closing timing of a clamper (not shown), and is wound around the outer peripheral surface of the plate cylinder.
As shown in FIG. 8, the roll-shaped master 100 is wound around a core material 124, and the terminal portion thereof is bonded and fixed to the core material 124. This is because the removal work is easier and the disposal is easier if the core 124 and the remainder of the master 100 are adhered to each other when the master is replaced.
[0007]
A marking (for example, black) 126 is provided on one side of the portion where the remaining amount of the master 100 reaches a predetermined length, which informs that the remaining amount of the master 100 is small. This is to be detected.
When the marking 126 appears and the master presence / absence sensor 118 is turned off, “no master” is displayed on an operation panel (not shown). Based on this display, the operator replaces the master.
[0008]
In order to prevent problems caused by the absence of the master 100 during the plate-making operation, the length of about one plate corresponding to the maximum size of the paper to be used is left from the front end to the end of the marking 126 of the master 100. Has been.
[0009]
[Problems to be solved by the invention]
In the conventional configuration described above, when the marking 126 appears during the plate making operation, the master can be used efficiently. However, the master that has been made is cut at the position of the length of one plate, and the next plate is If the master presence / absence sensor 118 is turned off when the master is detected by the master leading edge detection sensor 122 and conveyed for a predetermined distance, “no master” is displayed, and plate making cannot be performed.
In this case, the amount of the master to be discarded has a length up to the master tip detection sensor 122 in addition to the length of about one plate on which the marking 126 is attached, which is a problem from the viewpoint of economical use of the master. was there.
[0010]
Therefore, the main object of the present invention is to provide a stencil printing apparatus that can suppress the uneconomical property of the master and thus contribute to a reduction in printing cost.
[0011]
[Means for Solving the Problems]
A master whose end is separated from the roll core is used, and the end of the master is detected by a sensor to determine whether or not one plate can be made. If this is not possible, the master is wound around a plate cylinder and the plate is discharged as it is. . This is the gist of the present invention.
[0012]
Specifically, in the first aspect of the invention, the plate making means for making the master fed out from the roll state, the plate cylinder around which the master made by the plate making is wound, and the master are peeled from the plate cylinder. A stencil having a plate discharging means and a control means for controlling these operations, the plate making means having a master set detecting means for detecting a set state of the master and a master cutting means for cutting the master at a predetermined position. In the printing apparatus, when the master end is detected by the master set detection means during plate making, the control means determines whether or not a master feed amount for one plate can be obtained and feeds the master for one plate. if the amount is determined to not be obtained, once the master is wound around the plate cylinder, then the take-instrumentation and master by said plate discharging means is discharged printing plate output displays the master-free, the first edition amount of master Feed If it is determined that a normal printing operation is performed, the remaining master is wound around the plate cylinder, and then the wound master is discharged by the discharging means, and no master is output. It is configured to display .
[0013]
In the invention described in claim 2, in the stencil printing apparatus described in claim 1, when it is determined that a master feed amount for one plate can be obtained, it is determined that the remaining master amount is equal to or less than a predetermined length. In this case, the whole master is wound around the plate cylinder without being cut by the master cutting means, and then the wound master is discharged by the plate discharging means, and the absence of master is output and displayed . .
[0014]
The invention according to claim 3 adopts a configuration in which the plate making operation for the master is stopped when it is determined that the master feed amount for one plate can not be obtained in the stencil printing apparatus according to claim 1. ing.
[0015]
In the invention of claim 4, wherein, in the stencil printing machine according to claim 2, when the amount of the remaining master is determined to less than a predetermined length, stops the plate-making operation to the master, and employs a configuration that.
[0016]
In the invention described in claim 5 , plate making means for making a master fed out from a roll state, a plate cylinder on which the master made by making a plate is wound around the outer peripheral surface, plate removing means for peeling the master from the plate cylinder, and these A stencil printing apparatus having a master set detecting means for detecting a set state of the master, wherein the master set detecting means is upstream from the plate making position of the plate making means. It is provided at a position shorter than the margin length of the printing paper, and when the master end is detected by the master set detecting means during plate making, the control means once winds the master around the plate cylinder, and then A configuration is adopted in which control for discharging the wound master by the plate discharging means is executed, and no master is output and displayed .
[0017]
In the invention described in claim 6, the stencil printing apparatus described in claim 5 adopts a configuration in which when the master end is detected by the master set detecting means, the plate making operation for the master is stopped .
[0018]
In the invention according to claim 7 , plate making means for making a master fed out from a roll state, a plate cylinder on which the made master is wound on the outer peripheral surface, plate removing means for peeling the master from the plate cylinder, and these Control means for controlling the operation of the stencil printing apparatus, wherein the plate making means is a stencil printing apparatus having a master set detection means for detecting a set state of the master , between the master set detection means and the plate making position of the plate making means. Master end detection means for detecting the end of the master is provided at a position shorter than the margin length of the printing paper upstream from the plate making position, and the master end is detected by the master end detection means during plate making. when, the control means, once the master is wound around the plate cylinder, then performs the control for stencil discharge the take-instrumentation and master by said plate discharging means, and outputs display the master no It adopts a configuration that.
[0019]
In the invention described in claim 8, the stencil printing apparatus described in claim 7 adopts a configuration in which, when the master end is detected by the master end detecting means, the plate making operation for the master is stopped .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a schematic configuration of the stencil printing apparatus 2 in the present embodiment will be described based on FIG.
The stencil printing apparatus 2 includes an image reading unit 4, a plate cylinder 6, a plate making unit 8 as a plate making unit, a paper feeding unit 10, and a pressing force that is controlled to contact and separate by a contact / separation unit (not shown). It has a press roller 12 as a member, a paper discharge claw 14 disposed in the vicinity of the paper discharge side of the plate cylinder 6, a paper discharge conveying means 16, a paper discharge tray 18, a paper discharge means 20, and the like.
Although not shown, the plate cylinder 6 has a base body obtained by rolling a thin metal plate such as a stainless steel plate into a cylindrical shape, and a master wound around the outer peripheral surface of the plate cylinder 6 is sandwiched between the outer peripheral surfaces of the base body. The clamper 22 is provided.
[0025]
A large number of fine through-holes having a diameter of about 0.1 to 0.5 mm are formed in the base so that the supplied ink can be eroded to the outer surface. The plate cylinder 6 is rotatably supported by a support shaft 24 that also serves as an ink supply pipe, and an ink supply means 26 is provided inside. The ink supply means 26 includes an ink roller 28 that supplies ink to the inner peripheral surface of the plate cylinder 6, a doctor roller 30, and the like. The ink supplied from the support shaft 24 to the ink reservoir 32 through a distribution pipe (not shown) is regulated in thickness by the doctor roller 30 and supplied to the ink roller 28. When the press roller 12 presses the printing paper P, the ink is supplied. The roller 28 contacts the inner peripheral surface of the plate cylinder 6 to supply ink.
[0026]
The paper feeding means 10 separates and feeds the stacked printing paper P one by one in cooperation with a separating member (not shown) in order from the uppermost one of the paper feeding table 34 on which the printing paper P is stacked. A paper feed roller 36 and a registration roller pair 38 that temporarily stops the fed printing paper P and corrects an oblique shift or the like and then sends it to a transfer portion of the plate cylinder 4 at a predetermined timing.
The paper discharge transport unit 16 includes a transport belt 44 driven by a driving pulley 40 and a driven pulley 42, and a suction fan 46. The printed print paper P separated from the plate cylinder 6 by the paper discharge claws 14 is provided. The non-image surface (back surface) is sucked and conveyed.
The plate discharging means 20 includes a peeling roller 48, 50, a plate discharging roller 52, 54, conveying belts 56, 58 stretched between these rollers, and a plate discharging box 60 in which a master peeled from the outer peripheral surface of the plate cylinder 6 is accommodated. , And a compression plate 62 for compressing the master in the discharge box 60.
[0027]
Next, the printing operation of the stencil printing apparatus 2 will be briefly described.
Based on the read image information of the original document by the image reading means 4, the plate making unit 8 punches and makes the master 64, and the master 64 made by the plate making is held at the front end portion by the clamper 22 of the plate cylinder 6. It is wound around the outer peripheral surface of the plate cylinder 6 as it rotates. After the winding of the master 64, the plate attaching operation is performed.
The printing paper P is fed by the registration roller pair 38 at a timing when the leading edge of the image on the plate cylinder 6 coincides with a predetermined position in the conveyance direction of the printing paper P, and the printing paper P is fed to the printing drum 6 at this timing. The plate cylinder 6 is pressed by the press roller 12 moving to the side.
The ink supplied to the inner peripheral surface of the plate cylinder 6 by the ink roller 28 oozes out from the perforated portion of the master 64 through the fine through hole of the base and is transferred to the printing paper P. As a result, an ink image is formed on the printing paper P.
The printing paper P to which the ink image has been transferred is peeled from the plate cylinder 6 by the paper discharge claw 14 and is transported toward the paper discharge tray 18 (not shown) by the paper discharge transport means 16.
When the printing of a predetermined number of sheets is completed, the used master 64 is peeled off from the plate cylinder 6 by the plate discharging means 20.
[0028]
Next, the plate making unit 8 will be described with reference to FIG.
The plate making unit 8 has a unit frame 66, and the unit frame 66 is detachably attached to the apparatus main body via a guide member 67. In the unit frame 66, a roll-shaped master 64, a master set roller 68 and a set plate 70, a master set sensor 72 as a master set detecting means for detecting the set state of the master, a thermal head 74, and a master 64 A platen roller 76 that presses the thermal head 74 against the thermal head 74, a conveying roller pair 78, a master cutting means 80, a master tip sensor 82, a conveying roller pair 84, and the leading end portion of the master 64 during plate feeding. A guide 86 for guiding the six clampers 22 and a bending box 88 are provided. The master 64 is formed into a roll wound on the core 65, the termination that has been stopped by a weak adhesion to the core member 65 (a force enough to come off the conveying force of the master 64).
The master cutting means 80 is of a guillotine type and has a moving blade 80a and a fixed blade 80b. The bending box 88 is provided with a guide plate 88a that is selectively set at a position where the master 64 is conveyed and accommodated, and a suction fan 88b is provided.
In the present embodiment, there is no conventional master presence / absence sensor, and the master set sensor 72 also serves as its function.
[0029]
Each operation of the stencil printing apparatus 2 is controlled by the control means 90 shown in FIG.
The control means 90 is a microcomputer including a CPU, ROM, RAM, I / O interface, and the like, and detection signals from the master set sensor 72, master tip sensor 82, etc. and setting information from the operation panel 92 are input. The control unit 90 controls the thermal head 74, the platen motor 91, the operation panel 92 and the like based on these pieces of information.
[0030]
Next, based on the timing chart of FIG. 4, a method of using the master set sensor 72 when setting the plate making unit 8 to the apparatus main body, master autoloading and jam detection will be described.
When the plate making unit 8 is attached to the apparatus main body, the plate making unit set switch, the master set sensor 72, and the master presence sensor (in the conventional case) are turned on. Conventionally, when the master presence / absence sensor is turned on and the master set sensor 72 is turned off, it is determined that the master is set incorrectly. In the present embodiment, since there is no master presence sensor, when the master set sensor 72 is off, it is determined that a master set error has occurred.
[0031]
One second after the plate-making unit set switch is turned on, the platen pressure motor is turned on, and thereafter, the platen motor 91, the solenoid of the guide plate 88a, and the driving clutches of the conveying roller pairs 78 and 84 are turned on. These are turned off after transporting 18 mm after the master tip sensor 82 is turned on.
If the master tip sensor 82 does not turn on even after 5 seconds have passed since the platen motor 91 is turned on, it is determined that the master misfeed occurs (first check). A second check is performed 500 ms after the platen pressure motor is turned off. If the master tip sensor 82 is turned off, it is determined that the master misfeed occurs.
[0032]
Next, plate making control and control when the end of the master 64 is detected will be described based on the flowchart of FIG.
When a command to start the plate making process is issued (S1), the platen motor 91 is driven (S2), and it is checked whether or not the master has been sent by a specified amount (one plate) (S3). If the specified amount has been sent, the platen motor 91 is stopped (S4), and the master 64 is cut by the master cutting means 80 (S5). The master 64 thus made is wound around the outer peripheral surface of the plate cylinder 6 (S6), the printing paper P is supplied to perform the plate attaching process (S7), and the plate making process is finished (S8).
[0033]
During plate making, the master set sensor 72 is checked for on / off (S9), and when the master end is detected by the master set sensor 72, that is, when the master set sensor 72 is turned off, the control means 90 starts from the detection time point. A master amount that can be fed is calculated to determine whether or not a master feed amount for one plate can be obtained (S10). Control means 90, intends row subsequent control based on the determination result.
The transport amount of the master 64 until the end is detected is grasped by the control means 90 based on the number of steps of the platen roller 76, and the control means 90 counts the master 64 transport amount from the master set sensor 72 (reference position ( For example, a distance (the amount of remaining master) to the center position of the platen roller 76 is calculated, and it is determined whether or not one plate can be secured with the amount of remaining master 64. The amount of the remaining master 64 may be experimentally grasped as a quantitative value as a transport amount from the master set sensor 72 to the reference position for counting the transport amount of the master 64, and stored in the ROM of the control means 90. In this case, the calculation by the control means 90 is not necessary (the same applies to other embodiments).
[0034]
If it is determined that the feed amount of the master 64 for one plate cannot be obtained, it is checked whether or not the remaining amount of the master 64 has been sent (S11). Similar to the process, the master 64 is wound around the outer peripheral surface of the plate cylinder 6 (S12), and the master 64 on the plate cylinder 6 is discharged by the plate discharging means 20 without performing the plate attaching operation (S13). Along with this discharging operation, or after the discharging operation, the control means 90 outputs and displays “no master” on a liquid crystal display (not shown) of the operation panel 92 (S14 ).
In other words, in the present embodiment, the remaining master that cannot be subjected to plate making, which has been performed manually, is automatically performed using a normal plate feeding process. Since the end of the master 64 is separated from the core material 65, when the plate making unit 8 is pulled out from the apparatus main body, only the core material 65 remains in the plate making unit 8, and the operator takes out this core material and forms a new roll. The master 64 is set.
[0035]
If it is determined in S10 that the master feed amount for one plate can be obtained, it is checked whether the master 64 has been fed by the specified amount (S15), and a normal printing operation is executed. That is, the master 64 that has been subjected to plate making is cut at a predetermined length, wound around the outer peripheral surface of the plate cylinder 6 to perform a plate attaching operation, and after printing a predetermined number of sheets, the used master 64 is discharged. It peels from the plate cylinder 6 by means 20.
Thereafter, the remaining master 64 is wound around the outer peripheral surface of the plate cylinder 6 in the same manner as in the normal plate feeding process, and the master 64 on the plate cylinder 6 is discharged by the plate discharging means 20 without performing the plate attaching operation. Then, the control unit 90 you output display "Master Mu" on the liquid crystal display unit (not shown) of the operation panel 92.
[0036]
Even when it is determined that the master feed amount for one plate can be obtained, when the amount of the remaining master 64 is equal to or less than the predetermined length, the master including the length for one plate is not cut by the master cutting means 80. The whole 64 is wound around the outer peripheral surface of the plate cylinder 6, and the master 64 on the plate cylinder 6 is discharged by the plate discharging means 20 without performing the plate attaching operation. Then, the control unit 90 you output display "Master Mu" on the liquid crystal display unit (not shown) of the operation panel 92.
Here, “predetermined length” means the distance between the pair of conveying rollers 78 and 84. If the length is less than this length, the master 64 cannot be transported by the transport roller pairs 78 and 84, and the cut-off master 64 may remain in the transport path and may be difficult for the operator to take out. .
[0037]
In the case where the remaining master 64 is discharged without performing a normal printing operation, when it is determined whether the master feed amount for one plate can be obtained, the plate making operation for the master 64 is stopped. also not good. That is, when the determination is made, the control unit 90 stops driving the thermal head 74.
Even if the plate making is continued, it is not used for printing. Therefore, the plate making to the master 64 which is subsequently subjected to the plate removal process is meaningless.
If the plate making operation is stopped when the determination is made, an unnecessary heat generating operation of the heat generating element of the thermal head 74 can be avoided, and there is an advantage that deterioration of the thermal head 74 over time can be suppressed.
[0038]
The master set sensor 72 is provided at a position shorter than the length of the margin of the printing paper P (the margin on the rear end side in the conveyance direction) from the plate making position (the position punched by the thermal head 74; the same applies hereinafter) upstream in the master conveyance direction. It may be possible not to determine whether or not the master feed amount can be obtained.
That is, when the end of the master 64 is detected during plate making, the master set sensor 72 is provided at a position where the master feed amount for one plate cannot be obtained. When the end of the master 64 is detected during plate making, the control means 90 immediately winds the master 64 around the outer peripheral surface of the plate cylinder 6 and moves the master 64 on the plate cylinder 6 by the plate discharging means 20 without performing the plate attaching operation. Remove the print. Then, you output display "Master Mu" on the liquid crystal display unit (not shown) of the operation panel 92.
In this case, when the master end is detected by the master set sensor 72, but it may also be configured to stop the stencil making operation to the master 64. If the plate making operation is stopped when the end is detected, an unnecessary heat generating operation of the heat generating element of the thermal head 74 can be avoided, so that there is an advantage that deterioration with time of the thermal head 74 can be suppressed.
[0039]
Further, as shown in FIG. 6, while maintaining the position of the conventional master set sensor 72, the printing paper P is located between the master set sensor 72 and the plate making position and upstream from the plate making position in the master transport direction. A master end detection sensor 94 as a master end detection unit that detects the end of the master 64 may be provided at a position shorter than the length of the margin (the margin on the rear end side in the transport direction).
When the end of the master 64 is detected by the master end detection sensor 94 during plate making, the control means 90 immediately winds the master 64 around the outer periphery of the plate cylinder 6 and the plate cylinder by the plate removing means 20 without performing the plate attaching operation. 6 Master 64 is discharged. Then, you output display "Master Mu" on the liquid crystal display unit (not shown) of the operation panel 92.
Also in this case, when the master end is detected by the master end detection sensor 94, the plate making operation for the master 64 may be stopped. If the plate making operation is stopped when the end is detected, an unnecessary heat generating operation of the heat generating element of the thermal head 74 can be avoided, so that there is an advantage that deterioration with time of the thermal head 74 can be suppressed.
[0040]
In each of the embodiments described above, the roll-shaped master 64 wound around the core material 65 is used. However, even if a roll-shaped master 64 without the core material 65 is used, the same function based on the master end detection control as described above can be obtained. It is Ru can.
[0041]
【The invention's effect】
According to the present invention, it is possible to suppress the wasteful amount of master below 1 edition content, it is possible to suppress wasteful of the disposal of the master.
Further, a sensor corresponding to the master presence / absence sensor is not required, so that the cost can be reduced. Moreover, since the marking process to a master is unnecessary, it can also contribute to the cost reduction in master manufacture.
[0042]
According to the present invention, it is possible to facilitate the master replacement of the automatic disposal of the master.
[0044]
According to the present invention, it remains in the switching Re edge shaped master plate making unit can prevent the waste work becomes troublesome.
[0045]
According to the present invention, it is possible to suppress the deterioration over time of a heating member for perforating the master.
[0046]
According to the present invention, it can facilitate the control.
[0048]
According to the present invention, only be configured in traditional providing master end detection means, it is possible to impart a function capable of avoiding uneconomical of master.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a stencil printing apparatus according to an embodiment of the present invention.
FIG. 2 is an enlarged front view of a plate making unit.
FIG. 3 is a control block diagram.
FIG. 4 is a timing chart showing an operation when a plate making unit is set.
FIG. 5 is a flowchart showing control based on plate-making operation and master end detection.
FIG. 6 is an enlarged front view of a plate making unit according to another embodiment.
FIG. 7 is a schematic front view of a conventional plate making unit.
FIG. 8 is a perspective view showing a conventional roll-shaped master.
[Explanation of symbols]
6 Plate cylinder 8 Plate making unit 20 as plate making means Discharge means 64 Master 65 Core material 72 Master set sensor 80 as master set detecting means 80 Master cutting means 94 Master end detecting sensor as master end detecting means

Claims (8)

Plate making means for making a master fed out from a roll state, a plate cylinder on which the master made by winding is wound on the outer peripheral surface, plate removing means for peeling the master from the plate cylinder, and control means for controlling these operations In the stencil printing apparatus, the plate making means includes a master set detecting means for detecting a set state of the master and a master cutting means for cutting the master at a predetermined position.
When the master end is detected by the master set detection means during plate making, the control means determines whether or not a master feed amount for one plate can be obtained,
When the feed amount of 1 edition portion of the master is determined to not be obtained, once the master is wound around the plate cylinder, the output displays the master-free then to plate discharge the take-instrumentation and master by said plate discharging means And
When it is determined that a master feed amount for one plate can be obtained, a normal printing operation is performed, and the remaining master is wound around the plate cylinder, and then the wound master is wound by the plate discharging means. The stencil printing apparatus is characterized in that the stencil is discharged and the master is output and displayed . In the stencil printing apparatus according to claim 1,
If the feed amount of 1 edition portion of the master is judged to be obtained, when the amount of the remaining master is determined to less than the predetermined length, the plate cylinder the entire master without cutting by the master cutting means A stencil printing apparatus , wherein the wrapping master is discharged by the evacuating means, and the master is output and displayed . In the stencil printing apparatus according to claim 1,
A stencil printing apparatus, wherein when it is determined that the master feed amount for one plate can not be obtained , the plate making operation for the master is stopped . In the stencil printing apparatus according to claim 2 ,
A stencil printing apparatus, wherein when the amount of the remaining master is determined to be equal to or less than a predetermined length , the plate making operation for the master is stopped. Plate making means for making the master fed out from the roll state, plate cylinder on which the master made by winding is wound on the outer peripheral surface, plate discharging means for peeling the master from the plate cylinder, and control means for controlling these operations In the stencil printing apparatus having the master set detection means for detecting the set state of the master,
The master set detecting means is provided at a position shorter than the margin length of the printing paper upstream from the plate making position of the plate making means, and when the master end is detected by the master set detecting means during plate making, the control means Is a stencil printing apparatus characterized in that a master is once wound around the plate cylinder, and thereafter, the control of discharging the wound master by the plate discharging means is executed, and no master is output and displayed. In the stencil printing apparatus according to claim 5,
A stencil printing apparatus, wherein when the master end is detected by the master set detection means, the plate making operation for the master is stopped. Plate making means for making the master fed out from the roll state, plate cylinder on which the master made by winding is wound on the outer peripheral surface, plate discharging means for peeling the master from the plate cylinder, and control means for controlling these operations In the stencil printing apparatus having the master set detection means for detecting the set state of the master,
Master end detection means is provided between the master set detection means and the plate making position of the plate making means to detect the end of the master at a position shorter than the margin length of the printing paper upstream from the plate making position, When the master end is detected by the master end detection means during plate making, the control means executes a control for temporarily winding the master around the plate cylinder and then discharging the wound master by the plate discharging means. A stencil printing apparatus which outputs and displays no master. In the stencil printing apparatus according to claim 7,
A stencil printing apparatus, wherein when the master end is detected by the master end detecting means, the plate making operation for the master is stopped.

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