JPH049963A - Copying machine - Google Patents

Abstract

PURPOSE:To obtain a copying machine in which a specified original is not copied and the coloration is not performed even when a user tries to copy the original and to reduce the cost of the original by providing an original copying forbiddance information read means and a copying forbiddance means. CONSTITUTION:This machine is constituted by providing the original copying forbiddance information read means 1 (a photosensor 31 for detecting original density) and the copying forbiddance means 2 (a control part using a microcomputer). Specified original copying forbiddance information F different from the primary image information of the original is previously added to the original the copying of which is forbidden, such as a secret document. By depressing a printing switch in a state where such an original 24 is placed on an original platen 23, the control part starts a copying action and detects the bar-code of the information F according to a signal from the photosensor 31. At the time of detecting it before feeding a transfer paper, the copying action is interrupted and an effect that it is a copying forbidden original is displayed on a display unit. Even in the case of detecting it after feeding the transfer paper, copying is controlled so as not to be performed in accordance with the position of the transfer paper and the same display is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine that does not copy originals to which original copy prohibition information has been added in advance.

[Conventional technology]

Conventionally, measures have generally been taken for confidential documents, such as clarifying the distribution destination, adding a "-" to the document, controlling the quantity, and urging each distribution destination to thoroughly manage the document.

However, even if such measures are taken, it is clear that it is not impossible to copy confidential documents using a copying machine. In order to prevent this, a copy prohibition method is used in which the original (distributed document) is made of special paper so that if the original is copied, it will turn black due to heat or light from the exposure optical system of the copying machine. is proposed.

Furthermore, Japanese Patent Application Laid-Open No. 2-52384 discloses that a copying machine determines whether the content of a document is a document that cannot be copied, such as banknotes or securities, and if the document is a document that cannot be copied, the copying machine makes a copy of the document. It describes what has been done to prevent this.

[Problem to be solved by the invention]

In the copying prohibition method described above, if copying of a confidential document is prohibited, the confidential document must be made on special paper, which increases the cost considerably, and if the confidential document is copied, it will turn black and be read again. I become unable to do so.

In addition, the above-mentioned copying machine distinguishes documents that cannot be copied, such as banknotes and securities, and prevents them from being copied, but it distinguishes that documents such as confidential documents are not copyable documents and copies them. It ends up.

The present invention improves the above-mentioned drawbacks and reduces the cost of copy-prohibited documents by adding specific copy-prohibition information in advance to documents whose copying is to be prohibited, such as confidential documents, so that they cannot be copied. To provide a copying machine that can be used and does not cause discoloration even when attempting to copy an original.

Means for Solving Problem C] To achieve the above object, the present invention provides a copying machine that copies originals, as shown in FIG. This apparatus includes a document copy prohibition information reading means 1 for reading prohibition information, and a copy prohibition means 2 for prohibiting copying of the document based on the document copy prohibition information from the document copy prohibition information reading means 1.

[For production]

Specific manuscript copy prohibition information added in advance to the manuscript whose copying is prohibited is read by the manuscript copy prohibition information reading means 1, and the copy prohibition means 2 is read by the manuscript copy prohibition information from the manuscript copy prohibition information reading means 1. Copying the manuscript is prohibited.

〔Example〕

FIG. 2 schematically shows an embodiment of the present invention.

When the print switch is pressed, the photoconductor tram 11 is rotated by the main motor and is uniformly charged by the charging corona discharger] 2. After that, the light image of the document on the document table is exposed to light by the exposure means and is static. A latent image is formed, and the eraser 13 removes the charge from the non-image forming area on the photoreceptor tram 11 . Next, the electrostatic latent image on the photosensitive drum 11 is developed with color toner by the color developing device 14 or developed with black toner by the black developing device 15 to become a developed image, and the static electricity is eliminated by the pre-transfer static elimination lamp 16. . On the other hand, the transfer paper P is fed from the paper feeding device to the registration rollers, and sent out by the registration rollers in accordance with the developed image on the photoreceptor tram 11. After the upper developed image is transferred and separated from the photosensitive drum 11 by a separating corona discharger 18 and a separating claw 19, the image is fixed by a fixing device and is discharged outside the machine as a copy. Further, after the transfer paper is separated, the photoreceptor tram 11 is cleaned of residual toner by a cleaning device having a cleaning brush 20 and a cleaning plate 21, and the residual charge is erased by a charge removal lamp 22 to prepare for the next copying operation. Such a copying operation is repeated and continuously performed for the set number of copies set on the operation section.

As shown in FIGS. 3 and 4, in the exposure means, an original 24 is placed on a transparent original table 23 with its leading edge and center aligned with the original scale z5, and a pressure plate 26 is placed over it. During a copying operation, the original 24 on the original platen 23 is illuminated by the exposure light source 27, and the reflected light image is transmitted to the photoreceptor tram 11 via an optical system such as mirrors 28 and 29.
is illuminated by the light source 27 and the mirror 28.2.
The scanner including 9 moves forward to scan the original 24, thereby exposing the image of the original 24, and then the scanner moves backward. The scanner has a photosensor 30 for detecting document width. Photo sensor 31 for detecting document density. A photosensor 32 for detecting the length of the original is attached, and these photosensors 30, 31, 32 move back and forth like optical systems such as mirrors 28, 29, etc., and send light to the original 24 and the pressure plate z6 via the original platen 23. and receives the reflected light. Original table 23
Originals 24 of each size are placed on top with the center referenced.
The document density detection photosensor 31 detects the density of the document 2.1 while scanning the center portion of the document 24. The document width detection photosensor 30 scans and detects documents of a predetermined size or more, and the document length detection photosensor 32 scans and detects the central portion of each document 24.

FIG. 8 shows the control circuit of this embodiment.

The control section 3 is configured using a microcomputer, and receives detection signals from the photosensors 30, 3] and 32, and operation switches such as the printer 1 switch and the O key for setting the number of copies in the operation section 34. Signals and the like are taken in via the interface 35. The control unit 33 includes a photosensor 30 for detecting document width. For FA document length detection
The size of the original 24 is determined by determining the width and length of the original 24 from the detection signal from the sensor 32, and the eraser 13 is connected via the interface 35 so that the photosensitive tram 11 is neutralized according to the size of the original 24. control. The density detection signal as shown in FIG. 7(a) from the original density detection photosensor 3 is binarized by the interface 35 and becomes as shown in FIG. 7(b), and the control unit 33 uses the interface The concentration detection signal from 35 is taken in at a predetermined timing up to t2, and various controls are performed using this concentration detection signal. For example, the timing + tz is the timing at which the document density detection photosensor 3 detects the density from a portion D1 corresponding to the leading edge of the document 25 to a portion D2 separated by a predetermined distance, as shown in FIG. It is. The control unit 33 controls each display of the operation unit 34 via the interface 35 to display various types of information.
C drive circuit 41 to the main motor 36 . Controls the heater 37 of the fixing device. The control unit 33 also controls the charging corona discharger 12 through the high-voltage drive circuit 38. It controls the transfer corona dischargers 7 and 18, and further controls the resist clutch 39, paper feeding device 40, developing devices 14 and +5, pre-transfer static elimination lamp 16, etc. via the driver 10. Here, the main motor 36 drives the photoconductor tram 11, transfer paper conveyance system, etc.
The registration clutch 39 connects and separates the registration roller from its drive source. The paper feeding device 40 has a plurality of paper feeding cassettes, and a cassette containing transfer paper of a size selected by the operation section 34 or a transfer paper of a size selected according to the size of the original 24 by the control section 33. A paper cassette is selected by the control unit 33, and transfer paper is fed from this paper cassette to the registration rollers. The control section 33 performs the above-mentioned control in the same manner as in the prior art to perform the copying operation as described above.

In this embodiment, specific document copy prohibition information F, which is generally different from the original image information of the document, is added in advance to a document that prohibits the copying of confidential documents etc. (hereinafter referred to as a copy prohibited document). Copying of original documents with prohibition information F is not performed. The copy-prohibited original is created, for example, using a special paper on which specific original copy-prohibited information F is provided in advance. The specific document copy prohibition information F is, for example, a combination of the characters [Yes] and a specific barcode as shown in FIG. 9, or a combination of the copy strictly prohibited characters and a specific barcode as shown in FIG. Alternatively, a combination of characters whose duplication is strictly prohibited and a specific barcode as shown in FIG. 11 may be used. Further, specific manuscript copy prohibition information F may be added to one confidential document later to make it a copy-prohibited manuscript. For example,
The document copy prohibition information F may be stamped on a predetermined confidential document or the like using a stamp having specific document copy prohibition information. When the document is placed vertically or horizontally on the document table 23, the document copy prohibition information F is detected in the horizontal direction (document scanning direction) detected by the document density detection sensor 3, as shown in FIG. It is added to both ends and both ends of the vertical direction. Incidentally, when the original is placed only horizontally, the original copy prohibition information F may be added only to both ends in the horizontal direction, as shown in FIG.

The signal from the original density detection photosensor 31 changes depending on the density of the original 24 as shown in FIG. Barcode 1 of document copy prohibition information F
Determine whether or not .

Normal original 24 without original copy prohibition information F added
is placed on the document table 23 and the print switch of the operation section 34 is pressed, the control section 33 outputs the document copy prohibition information F in the signal from the document density detection photosensor 31.
Since there is no barcode, the original 24 is continuously copied as many times as the number of copies set using the 10 keys of the operation unit 34 as described above.

Copy-prohibited original 2 with original copy-prohibited information F゛ added
4 is placed on the document table 23 and the print switch of the operation unit 34 is pressed, the control unit 33 controls the copying operation as described above using the print signal from the print switch as shown in FIG. However, the barcode of the document copy prohibition information F is detected from the signal from the document density detection photosensor 31, and if this barcode is detected before the paper feeding device feeds the transfer paper, the copying operation is started. The process is interrupted and the display of the operation unit 34 displays that the document is a copy-prohibited document.

For example, as shown in FIG. 15, U9 is displayed on the copy number display segment display of the operation section 34.

In this case, the control unit 33 continues the copy prohibition state until the copy prohibition release switch is pressed, or cancels the copy prohibition state by replacing the document in response to a signal from the switch that detects the document on the document table 23. Further, the control unit 33 detects the barcode of the document copy prohibition information F after the transfer paper is fed, and the leading edge of the transfer paper reaches the image transfer position where the image transfer is performed by the transfer corona discharger 17. before the transfer corona discharger 17 is turned on, the transfer corona discharger 1
7 remains off and the main motor 36 continues to rotate to transport and eject the transfer paper, then the copying operation is stopped and the display of the operation unit 34 indicates that the original is a copy-prohibited original. Display. In this case, since the transfer corona discharger 17 remains off, the transfer paper does not transfer the developed image from the photoreceptor drum 11, and is ejected as a blank sheet, resulting in no copying operation being performed. . Control unit 33
After the detection of the bar code of the document copy prohibition information F reaches the visible image transfer position, whether during the transfer of the visible image to a long transfer paper by the transfer corona discharger 17 or after the transfer of the visible image to a short transfer paper, In this case, the main motor 3ii is immediately stopped and the machine is stopped, thereby interrupting the copying operation and causing a transfer paper jam, and a jam message is displayed on the display of the operation unit 3.1, indicating that the original is a copy-prohibited original. is displayed. In this case, the conveyance of the transfer paper will be stopped during the transfer or fixation of the developed image, and as a result, no copying operation will be performed.The above embodiment is an example of an analog copying machine. However, the present invention is equally applicable to digital copying machines. Further, in the above embodiment, the exposure means reads the original with the original reading device and converts the reading signal into an electrical signal.
The photoreceptor tram 11 may be exposed to light by converting the light into electricity using a light conversion means. In addition, information on prohibition of copying of manuscripts in F.
may use other data.

〔Effect of the invention〕

As described above, according to the present invention, in a copying machine that copies a document, there is provided a document copy prohibition information reading means for reading specific document copy prohibition information added in advance to a document whose copying is prohibited, and this FX document copy prohibition. Since the apparatus is equipped with a copy prohibition means for prohibiting the copying of the manuscript based on the manuscript copy prohibition information from the information reading means, specific manuscript copy prohibition information can be added in advance to the manuscript whose copying, such as a confidential document, is prohibited. You can prevent it from being copied. Moreover, copying of a copy-prohibited original such as a confidential document can be prohibited without using special paper, and the cost of the copy-prohibited original can be reduced, and the original can be prevented from discoloring even if an attempt is made to copy it.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the present invention, Fig. 2 is a sectional view schematically showing an embodiment of the invention, Fig. 3 is a diagram for explaining the embodiment, and Fig. 4 is a diagram of the copying machine. 5 is a diagram showing the document density detection range of the same embodiment. FIG. 6 is a waveform diagram showing an example of the output signal waveform of the photosensor for document density detection in the same embodiment. Figures (a) and (b) are waveform diagrams showing an example of the output signal waveform of the photosensor for detecting the original density and its binarized waveform, Figure 8 is a block diagram showing the control circuit of the same embodiment, and Figure 9 FIGS. 11 to 11 are diagrams showing each side of the original copy prohibition information, FIGS. 12 and 13 are diagrams showing each side of the addition position of the original copy prohibition information, and FIG. 14 is a diagram showing the processing of the control unit in the above embodiment. FIG. 15, which is a flowchart showing a part of the flow, is a diagram showing a display state that the document is a copy-prohibited document in the above embodiment. 1... Original copy prohibition information reading means, 2... Copy prohibition means. Figure 7 Figure (a) Time Time Bank υ Figure 4 Figure % /q Kansu Figure 44 Figure 4b Figure

Claims (1)

[Claims] In a copying machine that copies a document, a document copy prohibition information reading means reads specific document copy prohibition information added in advance to a document whose copying is prohibited, and the document copy prohibition information from the document copy prohibition information reading means is used. 1. A copying machine comprising: a copy prohibition means for prohibiting copying of a manuscript.