JPH05246115A - Sheet information masking device and printing device - Google Patents

Abstract

PURPOSE:To obtain excellent capability for handling waste sheets without large space and labor for disposing the sheets, make it possible to reuse the disposed sheets, and promote effective use of resources. CONSTITUTION:An information masking pattern memory 1 which stores information masking pattern is provided. A print image forming section 3 which forms image with plate or transference is provided for forming a print image of the information masking pattern by receiving the information masking pattern stored in the information masking pattern memory 1. The print image is overprinted on a paper face having information written on it of a sheet by a printing section 5 which prints image with stencil or electrophotography.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet information concealment processing device and a printing device, and more particularly to a paper sheet information concealment processing device and a stamping device for discarding paper sheets to prevent information leakage. It relates to a copying apparatus.

[0002]

2. Description of the Related Art As a paper sheet disposal apparatus for processing information sheets in which various kinds of information are written in an undecodable state in order to prevent information leakage, the paper sheets are finely cut. The cutting type is well known, and it is generally called a shredder.

[0003]

The cutting type paper waste disposal apparatus as described above cuts the paper sheets by the rotary cutter which is rotationally driven at a relatively high speed, and therefore is relatively large. Driving noise is generated, and it is not suitable for offices in terms of noise.

Further, since the paper sheets are finely cut and the cut pieces are accumulated in the cut piece storage box or the like without regularity, the aggregate of the cut pieces is placed in the cut piece storage box or the like. It becomes bulky. For this reason, there is a drawback in that it is difficult to handle, and a large space and labor are required for disposal.

Further, finely cut paper sheets have a great disadvantage that they cannot be recycled due to the cutting of paper fibers and the resources are not effectively utilized.

The present invention has been made by paying attention to the above-mentioned problems in the conventional paper sheet disposal apparatus.
After making the information written on the paper sheets unreadable, it is easy to handle the discarded paper sheets, and it does not take a large space and trouble to dispose them, and the discarded paper sheets It is an object of the present invention to provide a paper sheet processing apparatus and a printing apparatus that can be recycled and can promote effective utilization of resources.

[0007]

According to the present invention, an object hiding pattern storage unit storing an information hiding pattern and an information hiding pattern stored in the information hiding pattern storage unit are provided according to the present invention. A print image forming section for forming a print image of the information hiding pattern, and a print section for printing the print image formed by the print image forming section on a sheet of paper on which information is written. And a paper sheet information hiding processing device.

Further, the printing apparatus according to the present invention is a printing apparatus for forming a printing image by the printing image data by being given the printing image data and printing the printing image on a paper sheet. An information hiding pattern storage unit that stores an information hiding pattern as one print image data, and a mode setting unit that selectively sets the information hiding mode, and when the information hiding mode is set by the mode setting unit, Is characterized in that a printing image is formed by the information hiding pattern stored in the information hiding pattern storage section, and the printing image is printed on the information describing paper of the paper sheet.

Further, the printing apparatus according to the present invention has a document reading unit, and is provided with print image data based on a document image read by the document reading unit to form a print image based on the print image data. In a printing apparatus for printing a printing image on a paper sheet, an information hiding pattern creating section for creating an information hiding pattern based on the image read by the document reading section, and an information hiding mode are selectively set. A mode setting unit, and when the information hiding mode is set by the mode setting unit, a printing image is formed by the information hiding pattern created by the information hiding pattern creating unit, and the printing image is printed. It is characterized in that it is constructed so as to be printed on a paper on which information of a type is described.

[0010]

According to the above-mentioned structure, the information hiding pattern is printed on the surface of the information describing paper of the paper sheet to be disposed of, so that the information hiding pattern is overprinted on the information described on the paper sheet. , This overprinting makes the written information on the paper sheets unreadable.

[0011]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a basic configuration of a paper sheet information hiding processing device according to the present invention. A sheet information concealment processing apparatus is provided with an information concealment pattern storage unit 1 storing a paper information concealment pattern and an information concealment pattern stored in the information concealment pattern storage unit 1 to form a printed image of the information concealment pattern. And a printing unit 5 for printing the printing image formed by the printing image forming unit 3 on the surface of the information recording sheet of the paper sheet. There are stencil printing type, electrophotographic printer type, wire rod printer type, ink jet printer type and the like as the printing type adopted by this paper sheet information hiding processing device. In the case of the stencil printing type, the printing image forming unit 3 Is a plate making unit, the printing unit 5 is a printing unit, and in the case of an electrophotographic printer type, the printing image forming unit 3 is an electrostatic latent image forming unit for the photosensitive drum, and the printing unit 5 is a toner image. It becomes the development transfer part.

FIG. 2 shows a digital plate-making type stencil plate-making printing device as an embodiment of a printing device having a paper sheet information hiding function according to the present invention. The stencil plate printer
The document reading unit 11, the plate making unit 13, and the printing unit 15 are provided.

The document reading unit 11 is an image scanner, and has a line image sensor 17 for reading an image of a document conveyed in the sub-scanning direction, and a document feeding roller 19.

The plate making unit 13 includes a base paper roller unit 21, a thermal head 23 composed of a plurality of point-like heating elements arranged in a row, base paper feed rollers 25 and 27, and base paper guide rollers 29 and 31. , 33 and a base paper cutter 35, and a plurality of point-like heating elements of the thermal head 23 individually and selectively generate heat to form a heat sensitive perforation plate-making in a dot matrix manner on the heat-sensitive stencil base paper M. Then, the stencil sheet M after plate making is cut by the cutter 35.

The printing unit 15 has an ink permeable plate cylinder 37 having a porous structure, an ink supply device 39 arranged inside the plate cylinder 37, and a press roller 41. The stencil sheet M after plate making is wound and mounted.

A paper feeding unit 43 is provided on one side of the printing unit 15.
A paper discharge unit 45 is provided on the other side of the printing unit 15.

The paper feed section 43 includes a paper feed table 47 on which print sheets are stacked and placed, a pickup roller 49 for taking out the print sheets one by one from the paper feed table 47, and the plate cylinder 3 for the print sheets.
7 has a timing roller 51 for feeding between the pressure roller 7 and the press roller 41.

The paper discharge unit 45 has a peeling claw 53 for peeling the print paper from the plate cylinder 37, a paper discharge feed belt unit 55, and a paper discharge base 57 for stacking the printed print paper.

Further, on one side of the printing unit 15, there is provided a plate discharging unit 63 including a plate discharging roller 61 for peeling the used stencil sheet M from the plate cylinder 37 and sending it into the plate discharging box 59.

The stencil plate printing apparatus has an operation panel 67 on the upper surface of the outer case 65, and the operation panel 67 is
Although not shown in the figure, it is provided with keys for setting various operation modes, the number of prints, and the like, and a display unit such as a liquid crystal for performing operation instructions and status display.

FIG. 3 shows an embodiment of a control system of the digital plate-making type stencil plate-making printing apparatus as described above. This control system has a control unit 71 that controls the entire apparatus. The control unit 71 is of a microcomputer type including a CPU and the like, inputs various setting signals from the operation panel 67, and controls the document reading unit 11, the plate making unit 13, the printing unit 15, the paper feeding unit 43, and the plate discharging unit 63. Each operation is controlled according to a predetermined program.

The operation panel 67 includes a mode setting section 73 using a mode setting key (not shown), and the mode setting section 73 selects and sets any one of a normal plate-making printing mode, a concealment mode, a recording mode and a reproduction mode. It is like this.

The document reading unit 11 converts the document reading signal (analog signal) from the line image sensor 17 into an A / D converting unit 75 and a digital signal from the A / D converting unit, that is, read image data. A correction unit 75 for inputting and performing shooting correction, gamma correction and the like of the input data is stored, and the corrected read image data is stored in the read image data storage unit 79 one by one on the original.

The read image data stored in the read image data storage unit 79 is output to the plate making unit 13 as printing image data in the normal plate making printing mode in response to a command signal from the control unit 71, and an information hiding pattern in the hiding mode. The data is output to the creating unit 81 and to the storage medium driver 83 in the recording mode.

The storage medium driver 83 may be a floppy disk driver, in which the floppy disk 85 is replaceably loaded, the printing image data is written in the floppy disk 85, and the printing image data written in the floppy disk 85 is stored. It is designed to read.
The storage medium driver 83 may be a magnetic hard disk driver, a magneto-optical disk driver, or the like, other than the floppy disk driver.

The information hiding pattern creating section 81 includes a control section 7
The read image data storage unit 7 is operated by the command signal from
An information concealment pattern to be printed on a sheet of information describing paper sheets is automatically created according to the read image data input from 9. This is an arrangement pattern of the description information of sheets corresponding to the read image data. , The optimum information concealment pattern is automatically created according to the character type, line pitch, character pitch, etc. so that the described information cannot be decoded by overprinting, and the image data based on this information concealment pattern is used as one printing image data. It is configured to output to the plate making unit 13.

The plate-making section 13 includes an information hiding pattern storage section 8
The image data of the information hiding pattern can be given as one print image data rather than 7. The information hiding pattern storage unit 87 is composed of a ROM or the like, and stores image data of a plurality of information hiding patterns in advance.
In response to a command signal from the control unit 71, the image data based on the selected one information hiding pattern is output to the plate making unit 13 as one printing image data.

The information hiding pattern stored and stored in the information hiding pattern storage unit 87 is described in a black-painted pattern, a mesh pattern, a fine geometric pattern, an irregular dot pattern, an irregular stripe pattern, or a paper sheet P. At the same level as the characters and symbols that make up the information to be hidden, the paper sheets are printed by overprinting, as if characters with a relatively large number of strokes were arranged with a minute inter-character pitch and a minute inter-line pitch. This pattern is suitable for making information such as the characters described in P unreadable. The information hiding pattern, which has excellent information hiding ability, is a printing method of information described on paper sheets,
Although it varies depending on the type of the information forming body such as the printing ink and the toner, the irregular stripe pattern and the character pattern are generally excellent in the information hiding property. The characters used for this information hiding pattern are the original characters written on the paper sheet, in other words, if the information to be hidden is a Japanese sentence, it will be hidden, such as Hiragana, Katakana, Kanji, or English letters if it is an English sentence. It is preferable in terms of information hiding that the characters are the same type of characters that form the information to be written. The information hiding pattern by characters may be a regular or irregular repetition of a plurality of characters other than the repetition of a single character, or an appropriate sentence.

The plate making section 13 includes a drive section 89 for individually controlling the heat generation operation of each point heating element of the thermal head 23, and the read image data storage section 7 is included in the drive section 89.
9. Inputting the printing image data from the information hiding pattern creating unit 81 and the information hiding pattern storage unit 87, and selectively heating the plurality of point-like heating elements of the thermal head 23 individually according to the input printing image data. Then, the heat-sensitive perforation plate-making according to the print image corresponding to the input print image data is performed on the stencil sheet M in a dot matrix manner.

Next, an example of the operation flow of the digital plate-making stencil plate-making printing apparatus having the above-mentioned structure will be described with reference to FIGS. 4 and 5. First, the user sets the mode according to the signal from the mode setting unit 73 (step 1).
0-40).

In the normal plate-making printing mode (affirmative determination in step 10), it is then determined whether or not document recording is necessary (step 50). Whether or not document recording is necessary is one of the user setting items. When document recording is necessary, a recording mode described later is executed when the document image is read by the document reading unit 11 (step 60), and thereafter. The plate making process is started (step 80), and if the document recording is not necessary, the plate making process is started immediately (step 80).

In the plate making process in this case, the document reading unit 1 is used.
The original image to be printed is read by 1, and the read original image is taken into the plate making unit 13 as the print image data, and the plate making unit 13 makes a plate corresponding to the read original image.

When the plate making process is completed, the printing process is started next (step 90).

In the printing process, the used stencil sheet M mounted on the plate cylinder 37 is removed from the plate cylinder 37 by the plate discharge section 63, and the stencil sheet M for which the plate making is completed is then removed from the plate cylinder 37.
Is wound around the outer periphery of the plate cylinder 37, the plate cylinder 37 is driven to rotate, and the press roller 41 is vertically moved in synchronization with the rotation of the plate cylinder 37.
The discharge delivery belt unit 55 is driven.

As a result, the print sheets stacked and placed on the paper feed table 47 are taken out one by one by the pickup roller 49 and sent out to the timing roller 51, and the print sheet is pressed by the timing roller 51 onto the plate cylinder 37 and the press. The image is sent between the roller 41 and the upper surface, and stencil printing is performed on the upper surface by a printing image corresponding to the read original image.
The printed printing paper is peeled off from the plate cylinder 37 by the peeling claws 53 of the paper discharge unit 45, is conveyed toward the paper discharge tray 57 by the paper discharge feed belt portion 55, and is stacked on the paper discharge tray 57. ..

In the concealment mode (affirmative determination in step 20)
Next, it is determined whether or not it is necessary to record the information described on the paper sheet for which information is to be hidden (step 100). Whether or not information recording is necessary is one of the user setting items. When information recording is necessary, a recording mode described later is executed (step 110). In this case, the document reading section 11
The document whose image is to be read is a paper sheet for which the described information is concealed, and in reading this document image, the information described on the information description surface of the paper sheet is read. ..

Next, it is determined whether or not the concealment pattern setting mode is set to the manual setting mode (step 1
20). If the concealment pattern setting mode is set to the manual setting mode, the image data of one information concealment pattern selected by the manual setting is used as the information concealment pattern storage unit 8
The data is read from No. 7 and input to the plate making unit 13 (step 130). As a result, the plate making unit 13 carries out plate making of the printing image corresponding to the information hiding pattern by the image data read from the information hiding pattern storage unit 87 (step 14).
0). When the plate making process is completed, the printing process is started next (step 150).

On the other hand, if the concealment pattern setting mode is not set to the manual setting mode, that is, if it is the automatic creation mode, then it is determined whether or not the information reading is completed (step 160). This determination is whether or not step 110 has been executed, and step 11
If 0 has been executed, the reading of the information described on the paper sheet to which the described information is hidden has already been completed, and in this case, step 190 is executed next. Step 110
Is not executed and the information written on the paper sheet for which the written information is to be hidden has not been read, the document reading unit 11 then reads the information (step 170) to hide the written information. The information written on the information writing surface of the target paper sheet is read, and then step 180 is executed.

In step 180, the information concealment pattern creating section 81 is created based on the read image data of the information described on the information description surface of the paper sheet for which the description information is to be concealed.
Thus, the most preferable information hiding pattern is automatically created in terms of hiding the information, and the image data based on this information hiding pattern is input to the plate making unit 13 as one printing image data.
As a result, the plate making unit 13 causes the information hiding pattern creating unit 81 to
A printing process of a printing image corresponding to the information hiding pattern by the image data is performed (step 140). When the plate making process is completed, the printing process is started next (step 150).

The printing process in step 150 is performed in the same manner as the printing process in step 90. In this case, the paper for which the descriptive information is to be hidden should be discarded on the paper feed tray 47 in place of the printing paper. Set the leaves. As a result, the information hiding pattern is overprinted by stencil printing on the information writing surface of the target information hiding paper sheet, and the information described on this information writing surface is hidden by the overprinting of the information hiding pattern,
It becomes undecipherable.

In recording mode (affirmative determination in step 30)
First, the original reading unit 11 reads an image of the original (step 190). The image reading by the document reading unit 11 is performed on the image written on the printed document or the sheet of which the description information is to be hidden.
The image data of the image read by the document reading unit 11 is input to the read image data storage unit 79, and the storage medium driver 83 writes the image data on the floppy disk 85 (step 200).

In playback mode (affirmative determination in step 40)
Reads the image data written on the floppy disk 85 by the storage medium driver 83 into the image data storage unit 79 (step 210), and sets the plate making unit 13 to the plate making unit 13 using this image data as one piece of printing image data.
To enter. As a result, the plate making unit 13 carries out plate making of the imprinted image based on the read image data from the read image data storage unit 79 (step 220). When the plate making process is completed, the printing process is started next (step 230).
The printing process in step 230 is performed in the same manner as the printing process in step 90, whereby the printing based on the read image data is performed on the printing paper.

The playback mode may be prohibited from being executed by a person other than the specified person by setting a password.

The setting of the information hiding pattern in the above-mentioned manual setting mode may be changed electronically using a random number generator or the like every day or every time it is created. Decoding hidden information by elucidating the pattern itself also becomes difficult. The information hiding pattern may be a combination of the information hiding pattern creating unit 81 and the information hiding pattern storage unit 87.

The information hiding pattern created by the information hiding pattern creating section 81 may be readablely stored in a storage medium as needed for repeat use.

In the above-described embodiment, the case where the printing apparatus having the paper sheet information hiding function is applied to the digital plate-making stencil plate printing apparatus has been described. However, the paper sheet information hiding according to the present invention is described. The printing apparatus having a processing function can be similarly applied to an electrophotographic digital copying apparatus, a laser beam printer, a wire rod printer, an inkjet printer, or the like.

[0048]

As can be understood from the above description, according to the paper sheet information hiding processing apparatus and the printing apparatus according to the present invention, the information hiding pattern is printed on the information recording sheet of the paper sheet to be discarded. By doing so, the information hiding pattern is overprinted on the written information of the paper sheets, and the overprinted information makes the written information of the paper sheets unreadable, so that the paper sheets are not cut. The shape of the original cutting paper is maintained,
As a result, the handling of discarded paper sheets becomes awkward, and it does not take a lot of space and labor to dispose of them, and the paper fibers of the paper sheets are not cut. It becomes possible to recycle the discarded paper sheets and promote the effective use of resources.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a paper sheet information hiding processing device according to the present invention.

FIG. 2 is a schematic configuration diagram showing an embodiment of a digital plate-making stencil plate-making printing apparatus having a paper sheet information hiding function according to the present invention.

FIG. 3 is a block diagram showing an embodiment of a control system of a digital plate-making type stencil plate-making printing apparatus having a paper sheet information hiding function according to the present invention.

FIG. 4 is a flowchart showing steps 10, 20, 50 to 150 of an operation flow example of a digital plate-making type stencil plate-making printing apparatus having a paper sheet information hiding function according to the present invention.

FIG. 5 is a flowchart showing steps 30, 40, 190 to 230 of an operation flow example of a digital plate-making type stencil plate-making printing apparatus having a paper sheet information hiding function according to the present invention.

[Explanation of symbols]

 1 Information Concealment Pattern Storage Section 3 Printing Image Forming Section 5 Printing Section 11 Document Reading Section 13 Plate Making Section 15 Printing Section 17 Line Image Sensor 23 Thermal Head 35 Raw Paper Cutter 37 Plate Cylinder 39 Ink Supply Device 41 Press Roller 43 Feeding Section 45 Paper ejection section 63 Plate ejection section 67 Operation panel 71 Control section 73 Mode setting section 81 Information hiding pattern creating section 87 Information hiding pattern storage section

Claims (3)

[Claims] 1. An information hiding pattern storage unit that stores an information hiding pattern, and a print image forming unit that is given the information hiding pattern stored in the information hiding pattern storage unit and forms a print image of the information hiding pattern. A paper sheet information concealment processing device comprising: a print unit that prints the print image formed by the print image forming unit on a sheet of paper on which information about the paper sheet is described. 2. A printing device for forming a printing image by the printing image data by giving the printing image data, and printing the printing image on a paper sheet, in which information is concealed as one printing image data. An information hiding pattern storage unit that stores a pattern and a mode setting unit that selectively sets an information hiding mode, and if the information hiding mode is set by the mode setting unit, the information hiding pattern storage unit A printing apparatus, which is configured to form a printing image by the information hiding pattern stored in, and print the printing image on a sheet of paper on which information is recorded. 3. A document reading section is provided, and a print image based on the original image read by the original reading section is given to form a print image based on the print image data, and the print image is printed on a paper sheet. In a printing apparatus for printing, an information hiding pattern creating unit that creates an information hiding pattern based on an image read by the document reading unit,
A mode setting unit for selectively setting the information hiding mode, and when the information hiding mode is set by the mode setting unit, a printing image based on the information hiding pattern created by the information hiding pattern creating unit is displayed. A printing apparatus, which is configured to be formed and print the printing image on a sheet of paper on which information of paper sheets is described.