JPH11129602A - Stencil printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a delivery table from being carelessly stained by an ink adhered to a printing paper or the hand or the like of a worker from being carelessly stained at the taking of a delivered printing paper out of the delivery table by a method wherein one sheet of white paper is automatically delivered at first at the delivery of the printing paper. SOLUTION: In the case that a paper, the printed surface of which directs to the under surface side, is delivered in a stencil printing apparatus, which prints one side of the paper, only one sheet of white printing paper is delivered at the step S31. Next, a printing action is executed at the step S32. After that, the action is brought to an end. In short, the under side, on which printing is applied, of the printing paper is protected by the white printing paper, resulting in preventing a delivery table from being stained carelessly. Since no printing is applied on the top surface side or no ink also adheres to the top surface side of the printing paper, no careless staining of the hand or the like or a worker by the top surface of the printing paper at its taking out occurs.

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, and more particularly to a stencil printing apparatus which is designed so that a printing paper discharged and printed does not inadvertently stain a paper discharging table. The present invention relates to a device devised so that hands and the like are not inadvertently stained when taking out printed printing paper.

[0002]

2. Description of the Related Art In a stencil printing apparatus, printed printing papers fly and discharge into a paper discharge tray, and the discharged printing papers are stacked in a paper discharge stocker. become.

[0003]

According to the above-mentioned conventional configuration, there are the following problems. That is, in the stencil printing apparatus, an emulsion ink that is difficult to dry is used as an ink, and does not dry immediately after printing. Therefore, for example, when the printing paper having the back side printed is discharged into the paper discharge tray, the paper discharge tray may be inadvertently stained with the ink that has adhered to the rear face and has not yet dried. Was. In addition, when the printing paper discharged / laminated in the paper ejection tray is taken out of the paper ejection tray, the ink etc. attached to the front and back surfaces of the printing paper and not yet dried may impede the hand of an operator. Sometimes it got dirty easily.

The present invention has been made based on such a point, and an object of the present invention is to prevent a paper discharge tray from being unintentionally stained by ink attached to a print paper to be discharged, or a discharge tray. To provide a stencil printing apparatus capable of preventing a worker's hands and the like from being inadvertently stained by ink attached to a printing paper when the printed printing paper is taken out from a paper discharge tray. It is in.

[0005]

According to a first aspect of the present invention, there is provided a stencil printing apparatus capable of printing on both sides of a printing sheet. It is characterized in that one sheet is automatically discharged. A stencil printing apparatus according to a second aspect of the present invention is a stencil printing apparatus capable of printing on both sides of a printing sheet. In the stencil printing apparatus, a blank printing sheet is automatically ejected first when the printing sheet is ejected, and the blank sheet is printed when the printing is completed. It is characterized in that one sheet is automatically discharged. A stencil printing apparatus according to a third aspect is a stencil printing apparatus capable of printing on both sides of a printing sheet. In the stencil printing apparatus, it is determined whether or not printing is double-sided printing. Automatically ejects a single sheet of printing paper and automatically ejects a single blank sheet of paper at the time of ejection of the printing paper even if it is determined that printing is underside rather than double-sided printing. It is assumed that. In a stencil printing apparatus according to a fourth aspect, in a stencil printing apparatus capable of printing on both sides of a printing paper, it is determined whether or not printing is double-sided printing. If one sheet of print paper is automatically ejected, and if it is determined that the printing is bottom-side printing instead of double-sided printing, a blank sheet of printing paper is automatically ejected first at the time of printing paper ejection. Is characterized in that one print sheet is automatically ejected even after the printing operation is completed. In a stencil printing apparatus according to a fifth aspect of the present invention, in a stencil printing apparatus of a single-sided printing system that discharges paper with a printing surface directed upward, one blank printing sheet is automatically discharged at the end of printing. It is characterized by the following. A stencil printing apparatus according to a sixth aspect of the present invention is a stencil printing apparatus of a single-sided printing system that discharges paper with a printing surface directed downward, and automatically discharges one blank printing sheet first when discharging printing paper. It is characterized by doing so.

That is, in the case of the present invention, when printing paper is discharged during printing, one blank printing paper is automatically discharged first and / or last. Accordingly, when the discharge tray is inadvertently stained with ink that has already adhered to the discharged print paper and has not dried yet, or when the discharged print paper is taken out from the discharge tray, printing is performed. The present invention is intended to prevent a worker's hands and the like from being inadvertently stained with ink that has adhered to a sheet and has not yet dried.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
A first embodiment of the present invention will be described. First, the overall configuration of a stencil printing apparatus capable of performing double-sided printing to which the present invention is applied will be described with reference to FIG. A first plate cylinder 1, a second plate cylinder 3, and a transfer cylinder 5 are arranged, and the first plate cylinder 1, the second plate cylinder 3, and the transfer cylinder 5 are rotated in synchronization by a driving unit (not shown). It has become. That is, the first plate cylinder 1 rotates in the direction indicated by arrow A in FIG. 1, the second plate cylinder 3 rotates in the direction indicated by arrow B in FIG. 1, and the transfer cylinder 5 moves in the direction indicated by arrow C in FIG. To rotate.

A plate making means 7 is provided on the upper right side of the first plate cylinder 1 in FIG. Then, the document data for front side printing is read by a document reading unit (not shown), and the read document data for front side printing is output to the plate making means 7. The perforating means 7 perforates and perforates the stencil sheet based on the input original document data for front side printing. The perforated and perforated stencil sheet is wound and set on the outer peripheral surface of the first plate cylinder 1.
That is, the clamping means 9 is provided on the outer peripheral surface of the first plate cylinder 1, and the leading end of the stencil sheet is clamped by the clamping means 9, and thereafter, the first plate cylinder 1 rotates in the direction of arrow A. As a result, the first plate cylinder 1 is wound around the outer peripheral surface.
Plated.

Next, a document reading means (not shown)
The document data for backside printing is read, and the read document data for backside printing is output to the plate making means 7. The perforating means 7 perforates and perforates the stencil sheet based on the input back side printing document data. The perforated and perforated stencil sheet is provided on another clamping means 1 installed on the outer peripheral surface of the first plate cylinder 1.
The first printing drum 1 is clamped at its tip, and the first printing drum 1 is rotated in the direction of arrow A, so that the outer peripheral surface of the first printing drum 1 (since the stencil sheet for surface printing has already been wound / plated, (The outer peripheral surface of the stencil sheet). Then, from there, it is transferred to the transfer cylinder 5 side. That is, the clamp unit 11 and the clamp unit 13 on the transfer cylinder 5 side are opened at a position where they face each other, whereby the leading end of the stencil sheet is transferred to the clamp unit 13 side on the transfer cylinder 5 side and clamped. Thereafter, the transfer drum 5 is wound around the outer peripheral surface of the transfer drum 5 by rotating in the direction of arrow C.

Next, the stencil sheet is delivered from the transfer cylinder 5 side to the second plate cylinder 3 side. That is, when the clamping means 13 of the transfer cylinder 5 and the clamping means 15 of the second plate cylinder 3 open each other, the leading end of the stencil sheet is moved to the second position.
It is delivered to the clamping means 15 of the plate cylinder 3 and clamped. Thereafter, as the second plate cylinder 3 rotates in the direction of the arrow B, the second plate cylinder 3 is wound and set on the outer peripheral surface of the second plate cylinder 3. A printing means (not shown) is provided in the first plate cylinder 1 and the second plate cylinder 3.

On the left side of the transfer cylinder 5 in FIG.
7 are installed. The paper supply unit 17 includes a paper supply table 19 on which a plurality of printing papers 21 are printed.
Are stacked and held. Further, a pickup roller 23 is disposed so as to contact the uppermost printing paper 21. On the right side of the pickup roller 23 in FIG. 1, a pair of registration rollers 25 and 27 are opposed and arranged. The uppermost sheet of printing paper 21 is taken out by the pickup roller 23 and supplied between the first plate cylinder 1 and the transfer cylinder 5 via the pair of registration rollers 25 and 27. The front side of the supplied printing paper 21 is subjected to surface printing from the first plate cylinder 1 side when passing between the first plate cylinder 1 and the transfer cylinder 5, and at the same time, the back side is printed from the transfer cylinder 5 side. The back side printing is performed.

In the printing on the transfer cylinder 5 side, first, an image is transferred from the second plate cylinder 3 side to the transfer cylinder 5 side, and the transferred image is transferred and printed on the back side of the printing paper 21. It is. The printed printing paper 21 is separated from the transfer cylinder 5 by the separation claw 29 and is discharged onto the discharge tray 31. The stencil sheet wound and set on the outer peripheral surface of the first plate cylinder 1 is discharged to the plate discharging means 33, and the second plate cylinder 3 is discharged.
The stencil paper wound and set on the outer peripheral surface of the stencil
5 will be discharged.

The stencil printing apparatus having the above-described configuration and operation includes:
Cleaning means 41 is provided. That is, as described above, the image data for backside printing is transferred from the second plate cylinder 3 side to the outer peripheral surface of the transfer cylinder 5, and the transferred image data is transferred and printed on the backside of the printing paper 21. . that time,
100% transfer of ink from transfer cylinder 5 to printing paper 21
Instead, the ink remains on the outer peripheral surface of the transfer cylinder 5. The remaining ink is to be removed by the cleaning means 41. This cleaning means 41 is used for transferring a cleaning liquid.
It is composed of a coating unit 43 and a wiping unit 45.
Then, the cleaning liquid is applied to the outer peripheral surface of the transfer cylinder 5 by the cleaning liquid transfer / application means 43, and the cleaning liquid containing dirt such as ink is wiped by the wiping means 45.

As shown in FIG. 2, the stencil printing apparatus having the above configuration is provided with a control means 51, which controls the sheet feeding means 17 and the stencil printing means 53 by the control means 51 so that a printing operation is performed. When the discharge of the printing paper 21 is started and / or at the end of the printing operation, the blank printing paper 21 is automatically and selectively discharged to the discharge tray 31.
In addition, the stencil printing means 53 in FIG.
It is a general term for the configuration consisting of means related to printing.

The operation of the above configuration will be described with reference to the flowchart of FIG. Since the general operation from plate making to printing and paper discharge has already been described, the blank printing paper 21 during the printing operation is described here.
Only the timing of paper discharge will be described. As shown in FIG. 3, when starting, first, it is determined whether or not printing is double-sided printing (step S1). If the printing is determined to be double-sided printing, the process proceeds to step S2.
Then, one blank printing paper 21 is discharged. The discharge of the blank printing paper 21 prevents the discharge tray 31 from being inadvertently stained with ink that has adhered to the back surface of the next new printing paper 21 that has been discharged and has not yet dried. be able to. Next, the process proceeds to step S3, where a desired printing operation is performed, and the process ends.

On the other hand, if it is determined in step S1 that the printing is not one-sided printing but one-sided printing, the process proceeds to step S4, and the one-sided printing is printed on the top side (front side printing).
It is determined whether or not this is the case. Here, if it is determined that the printing is not top printing (in this case, bottom printing (back printing)), the process proceeds to step S2, and one blank printing paper 21 is discharged. By discharging the blank printing paper 21, the discharge tray 3 is discharged in the same manner as described above.
1 can be prevented from being carelessly soiled. Next, the process proceeds to step S3, where a desired printing operation is performed, and the process ends.

If it is determined in step S4 that the printing is top printing (front printing), the flow directly proceeds to step S3 to execute the printing operation and terminate. In this case, since the ink does not adhere to the lower surface (back surface) side of the printing paper 21, the discharge tray 31 does not become dirty.

According to the present embodiment, the following effects can be obtained. That is, when printing is performed on at least the lower surface (back surface) of the printing paper 21, the blank printing paper 21 is first discharged, so that the lower surface of the newly discharged printing paper 21 is printed. The discharge tray 31 is not inadvertently soiled by the ink that has adhered and has not dried yet. Also, when the printed matter is taken out from the paper discharge tray 31 after the printing is completed, by taking out the printed matter through the blank printing paper 21, it is possible to prevent the hands and the like of the worker from being stained at the time of taking out.

Next, a second embodiment of the present invention will be described with reference to the flowchart of FIG. When you start,
First, it is determined whether or not the printing is double-sided printing (step S11). If it is determined that the printing is double-sided printing, the process proceeds to step S12, and only one blank printing sheet 21 is discharged. Accordingly, it is possible to prevent the discharge tray 31 from being inadvertently stained with ink that has adhered to the back surface of a new print sheet 21 to be discharged next and has not dried yet. Next, the process proceeds to step S13 to execute a printing operation. After the printing operation is completed,
The process proceeds to step S14, where only one blank printing sheet 21 is discharged, and then the process ends. In other words, in this case, the printed matter is sandwiched between the blank printed paper 21 discharged first and the printed paper 21 discharged last. This takes into account the time when the printing paper 21 is taken out. By removing the printing paper 21 through the front and rear blank printing papers 21, 21, it is possible to prevent the hands and the like of the worker from being stained. can do.

On the other hand, if it is determined in step S11 that the printing is not single-sided printing but single-sided printing, the process proceeds to step S15 to determine whether or not printing is top-side printing (front-side printing). When it is determined that the printing is the top printing, the process proceeds to step S13, and the printing operation is performed. After the printing operation is completed, step S14
And only one blank printing paper 21 is discharged,
Then, the process ends. That is, in this case, the printing paper 21
Since printing is not performed on the lower surface (back surface) side of the printer, the blank printing paper 21 is not discharged prior to the paper discharging operation, and the blank printing paper 21 is discharged after the printing operation.

If it is determined in step S15 that the printing is not the top printing but the bottom printing (reverse printing), the process proceeds to step S16, where only one blank printing paper 21 is discharged. The process proceeds to S17, executes the printing operation, and ends. That is, in this case, since no ink is attached to the upper surface side, the blank printing paper 21 is not discharged after the printing operation is completed.

According to this embodiment, if it is determined that the printing is double-sided printing, only one blank printing paper 21 is discharged at the beginning and end, respectively, and the blank printing paper 2
Since the printed matter is sandwiched between the print papers 1 and 21, it is possible to prevent the discharge tray 31 from being soiled, and it is possible to take out the print paper 21 in a state of being sandwiched between the blank print papers 21 and 21 when taking out the print paper 21. Therefore, it is possible to reliably prevent the hands and the like of the worker from being stained. In the case of single-sided printing, it is determined whether the printing is top-side printing or bottom-side printing, and the blank printing paper 21 is discharged at an appropriate timing (last or first). It is possible to prevent inadvertent stains on the table 31 and inadvertent stains on the hands of workers at the time of removal, and also does not unnecessarily discharge the blank printing paper 21.

Next, a third embodiment of the present invention will be described with reference to FIG. This shows a stencil printing apparatus for single-sided printing, in which the paper is discharged with the printing surface facing the upper surface side. In this case, a printing operation is executed (step S21), and then only one blank printing sheet 21 is discharged (step S22), and the process is thereafter terminated.
That is, the upper surface of the printing paper 21 (the surface on which printing is performed)
Is protected by the blank printing paper 21, whereby when the printing paper 21 is taken out, it is possible to prevent the hands and the like of the worker from being carelessly stained. Since no printing is performed on the lower surface side, no ink adheres, and therefore, the paper discharge tray 31 does not become dirty.

Next, a fourth embodiment of the present invention will be described with reference to FIG. This shows a stencil printing apparatus for single-sided printing, in which the paper is discharged with the printing surface directed downward. In this case, blank printing paper 2
1 is discharged (step S31), a printing operation is executed (step S32), and the process is terminated.
That is, the lower surface of the printing paper 21 (the surface on which printing is performed)
Is protected by the blank printing paper 21, thereby preventing the discharge tray 31 from being carelessly soiled. Since no printing is performed on the upper surface side, no ink adheres to the upper surface side, so that the hands and the like of the worker are not inadvertently stained by the upper surface at the time of removal.

The present invention is not limited to the first to fourth embodiments. For example, in the case of a stencil printing apparatus that performs double-sided printing, a single blank printing sheet 21 may always be ejected at the beginning and end regardless of the printing content, and the printing sheet 21 may be protected before and after. . Similarly, in the case of a stencil printing apparatus that performs double-sided printing, a blank printing paper 21 is always required only at the beginning regardless of the printing content.
May be discharged one sheet. Further, an operation panel may be provided in the control means 51 to cancel or select the above-described embodiment.

[0026]

As described above in detail, according to the stencil printing apparatus according to the present invention, in a stencil printing apparatus capable of printing on both sides of a printing sheet, a blank sheet of printing paper is first automatically ejected when the printing sheet is ejected. Therefore, it is possible to prevent the discharge tray from being carelessly stained with ink that has adhered to the back surface of the discharged printing paper and has not dried yet. In addition, when the printing paper is taken out from the paper discharge tray, it is possible to prevent the worker's hands and the like from being carelessly stained by holding and taking out the blank printing paper located at the lowest position. Further, in a stencil printing apparatus capable of printing on both sides of a printing paper, a blank printing paper is first discharged when the printing paper is discharged.
If one sheet of paper is automatically ejected and one sheet of blank printing paper is automatically ejected at the end of printing, the printing sheet can be protected by the blank sheet of paper before and after.
The above effects can be further enhanced. Further, in a stencil printing apparatus capable of printing on both sides of a printing sheet, a blank printing sheet is discharged first and / or last according to the printing content, so that the printing sheet is replaced with a blank printing sheet according to the printing content. Thus, it is possible to protect the paper discharge tray and the hands and the like of the workers from being unnecessarily discharged without unnecessarily discharging the blank printing paper. Also, in a stencil printing apparatus of a single-sided printing method that discharges a print sheet with the printing surface of the print sheet oriented to the upper surface or the lower surface, the discharge tray is contaminated by automatically discharging one blank print sheet as appropriate. That is, it is possible to prevent the worker's hands and the like from becoming dirty.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention, and is a diagram illustrating an entire configuration of a stencil printing apparatus capable of performing double-sided printing.

FIG. 2 is a diagram illustrating the first embodiment of the present invention, and is a block diagram illustrating a relationship between control means of a stencil printing apparatus capable of performing double-sided printing and other components.

FIG. 3 is a diagram showing an operation procedure according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an operation procedure according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing an operation procedure according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a fourth embodiment of the present invention, and is a flowchart showing an operation procedure.

[Explanation of symbols]

 17 paper feeding means 21 printing paper 31 paper ejection tray 51 control means

Claims (6)

[Claims] 1. A stencil printing apparatus capable of printing on both sides of a printing paper, wherein one blank printing paper is automatically discharged first when the printing paper is discharged. 2. A stencil printing apparatus capable of printing on both sides of a printing sheet, automatically ejecting one blank printing sheet at the time of printing sheet ejection, and automatically ejecting one blank printing sheet at the end of printing. A stencil printing machine characterized by being made on paper. 3. A stencil printing apparatus capable of printing on both sides of printing paper, determining whether printing is double-sided printing, and in the case of double-sided printing, first printing one blank printing paper when discharging the printing paper. A stencil printing apparatus characterized in that a blank printing sheet is automatically ejected first when a printing sheet is ejected even when it is determined that the sheet is to be automatically printed and to be bottom-side printing instead of double-sided printing. 4. In a stencil printing apparatus capable of printing on both sides of a printing sheet, it is determined whether the printing is double-sided printing. If the printing is double-sided printing, one sheet of blank printing paper is first printed when the printing sheet is discharged. Automatically ejects a sheet of blank printing paper first when ejecting print paper even if it is determined that the printing is bottomside printing instead of double-sided printing. A stencil printing machine wherein one printing sheet is automatically discharged. 5. A stencil printing apparatus of a single-sided printing system for discharging a sheet with a printing surface directed upward, wherein one blank printing sheet is automatically discharged at the end of printing. Printing device. 6. A stencil printing apparatus of a single-sided printing system for discharging a sheet with a printing surface directed downward, wherein a blank sheet of paper is automatically discharged first when the printing sheet is discharged. A stencil printing machine characterized by the following.