JPS63163866A - Copying function controller for copying machine - Google Patents

Abstract

PURPOSE:To securely hold secrecy by comparing the pattern of an original with a regular pattern from a regular pattern generating means and generating a decision output by a copying process control means when the both match with each other, and inhibiting a secret document from being copied. CONSTITUTION:When the original 1 is placed on an original platen 2 and copied, a detection part 20 reads a bar code 36 and a specific pattern 34 by scanning the original surface by solid-state scanning elements 22, 28, and 33. Further, the solid-state scanning elements 22, 28, and 33 and the regular pattern generating circuit 40 which generates the regular pattern corresponding to the specific pattern are connected to a synchronizing clock generating circuit 39. Further, the solid-state scanning elements 22, 28, and 33 and the regular pattern generating circuit 40 are connected to a comparing circuit 41, which sends out the decision output when obtaining a coincidence to operate the copying process control circuit 42, thereby inhibiting a copying process from being performed. Consequently, the secret document is prevented from being copied.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying function control device for a slit exposure type copying machine.

2. Description of the Related Art Copying machines generally have a structure as shown in FIG. That is, a translucent original table 2 on which the original 1 is placed.
A light source 3 and a reflecting mirror 4 are provided below to move back and forth along the document table 2, and this reflecting mirror 4
An optical system is formed by a reflecting mirror 5 that moves at half the speed of There is. The photoreceptor 8 is formed to rotate at a constant speed in one direction, and is charged to a predetermined potential by a charger 10 as a pre-process of the exposure section 9. An image is formed. Next, development is performed by a developing section 11 provided below. Also, a recording paper tray 1 in which recording paper 12 is stored on the side.
3 is provided, and a transport roller 1 is provided from this recording paper tray 13.
4 and separation roller 15, the recording paper 12 is fed along the photoreceptor 8. A transfer charger 16 is provided on the back side of the recording paper 12, and the toner on the photoreceptor 8 is transferred onto the recording paper 12. Then, it is fixed by the fixing device 17 and transferred to the copy tray 18.
Paper is ejected upward. Further, the surface of the photoreceptor 8 is cleaned by the cleaning roller 19, and the static electricity is removed by a static electricity removal charger (not shown).

A flowchart showing the functions of a copying machine as shown in FIG. 2 is as shown in FIG.
It shows the movement of.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a copying function control device for a copying machine that prevents copying of confidential documents.

Structure The present invention comprises: an optical system that scans an original image and forms an electrostatic latent image on the photoreceptor by forming the image on the photoreceptor; a solid-state scanning element that receives light obtained by dividing the optical path of the optical system; a regular pattern generating means for generating a regular pattern; a comparing means for comparing the regular pattern generated by the regular pattern generating means with the document image; It consists of a copying process control means for controlling the operation of the copying process based on the output.

Therefore, if a specific pattern for prohibiting copying is formed in a manuscript that is a secret document, and a rule pattern is made to match the specific pattern, when the comparison means matches the two, the copying process control means will process the copying process. This system is designed to prevent the copying of confidential documents by issuing an order prohibiting the copying of confidential documents.

An embodiment of the present invention will be described based on FIGS. 3 to 8. Components that are the same as those described in FIGS. 1 and 2 are designated by the same reference numerals, and description thereof will be omitted. First, in FIG. 3, a detection unit 20 consisting of an imaging lens 21 and a solid-state scanning element 22 is located in the same plane as the optical path from the second mirror 5 to the in-mirror lens 6, with its position slightly shifted in the horizontal direction. It is provided. As the solid-state scanning device 22, a semiconductor imaging device such as a photodiode array or COD is used.

Next, what is shown in FIG. 4 is a case where the photoreceptor 8 is belt-shaped and is provided parallel to the document table 2. In the case shown in FIG. A scanning housing 23 is provided between the photoreceptor 8 and the original platen 2 and moves parallel thereto, and in order to obtain a light beam for copying, a reflecting mirror 24 and a reflection mirror 24 formed in a figure 7 shape are orthogonal to each other. A mirror lens 25 is provided, and the detection s20 includes a reflection mirror 26, an imaging lens 27, and a solid-state scanning element 28.

Furthermore, the one shown in FIG. 5 is of a type in which the document table 2 moves back and forth, and the photoreceptor 8 is also belt-shaped and moves in the same direction at the same speed as the document table 2. and
Light source 29, three fixed mirrors 30, and one imaging lens 3
1 forms an optical system for copying, and an imaging lens 32 and a solid-state scanning element 33 form a detection section 20.

The documents shown in FIGS. 6(a), 6(b), 6(c), and 6(d) are confidential documents and should not be copied, and each document has a specific pattern 34 formed in advance. First, the one shown in FIG. 6(a) has a characteristic pattern 34 formed by a bar code 36 on a reading line 35 in the X-axis direction at the upper or lower edge. Next, in the case shown in FIG. 6(b), a very long barcode 36 is formed in the X-axis and Y-axis directions on the four sides, and a specific pattern 34 is provided. Also, Figure 6 (
What is shown in C) is a specific pattern 34 with diagonal lines 37, and reading lines 35 are set at two locations, upper and lower.

Further, in the case shown in FIG. 6(d), a specific pattern 34 is formed by two intersecting diagonal lines 38.

When such a document 1 is placed on the document table 2 and a copy is taken, the solid-state scanning elements 22, 28.3 are detected in any type of detection section 20 shown in FIGS.
3, a bar code 36 or a specific pattern 34 formed by diagonal lines 37 and 38 is read, and this is photoelectrically converted and taken out as an electrical signal. As the electrical detection means, as shown in FIG. 7, solid state scanning elements 22, 28, . ．． 33 and a regular pattern generation circuit 4o as regular pattern generation means corresponding to a specific pattern are connected, and these solid state scanning elements 22
, 28, 33 and the regular pattern generation circuit 40 are connected to a comparison circuit 41 as a comparison means, and when a match is found, a judgment output is output to operate a copying process control circuit 42 as a copying process control means.

Such a process follows the progress shown in the flowchart of FIG. Here, thin solid line arrows indicate the movement of the photoreceptor 8, broken line arrows indicate the movement of the light beam, double solid line arrows indicate the movement of the recording paper 12, and thick solid line arrows indicate the movement of the detection signal. However, the cases shown as (1) to (2) indicate cases in which the copying function is stopped by the output of the copying process control circuit 42, and one or a combination of the following operations occur.

(2) A blocking device is provided in the developing section 11 to prevent the developer from moving to the photoreceptor 8.

■ Cut off the charging energy to the transfer charger 16.

(2) Cutting off the thermal energy necessary for fixing in the fixing device 17;

■Change the ejection route at the ejection part so that it is ejected into a separate built-in storage tray so that it cannot be easily taken out.

(2) A charger for charging or eliminating static electricity that destroys the electrostatic latent image is installed next to the exposure section 9 and is operated by a control signal.

(2) The developer is removed from the recording paper 12 separated from the photoreceptor 8, but not yet fixed, by brushing or using an obstacle.

In addition, the information may be destroyed so that it cannot be read, or an excessive amount of new developer may be added.

■Stop the supply of recording paper 12.

The function as a copying machine is stopped by such means (1) to (2), and the secret document on which the specific pattern 34 is formed cannot be copied, and only the original exists. Of course, for copiers with different configurations,
The same effect as in the previous case can be obtained by stopping its main function.

However, it should be noted that in the case of the specific pattern 34 shown in FIGS. 6(a) and (b), the detection scan precedes the exposure scan, so the timing may be the same, but as shown in FIG.
In the case of the specific pattern 34 shown in (d).

Since it is necessary to perform full-screen detection scanning of the original, it is necessary to change the scanning method. First, a duplication process is adopted, such as multi-cycle copying, in which information on the surface of the document is once exposed on the photoreceptor 8 and then the process is moved to the next process. Second, among the movements of the scanning system, a reciprocating scanning method is adopted in which detection scanning of the specific pattern 34 is performed during forward scanning, and exposure scanning is performed during backward scanning. Thirdly, a two-scan method is used in which a detection scan is performed once before an exposure scan.

Further, when forming the specific pattern 34, printing is performed in a color and density different from that of the image, and the solid-state scanning element 22,
28.33, or by providing a color separation filter in the detection optical system and detecting a pattern using an optical signal of a specific wavelength. Furthermore, the specific pattern 34
may be formed by dividing the background of the original 1 into two or more areas.

Effects In the present invention, as described above, the pattern of the original and the rule pattern from the rule pattern generation means are compared by the comparison means, and when the two match, the copying process control means generates an output. Control such as prohibiting copying of the information is simple, and confidentiality can be ensured.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of the structure of a conventional copying machine;
The figure is a flowchart, FIGS. 3 to 5 are longitudinal sectional side views showing each of the detection units of an embodiment of the present invention, and FIG.
), (b), (c), and (d) are plan views showing each of the specific patterns, FIG. 7 is a block diagram, and FIG. 8 is a flowchart showing the portion including the detection section for stopping the copying function. 1... Original, 8... Photoreceptor, 22, 28.33...
・Solid state scanning element, 40... Regular pattern generation circuit (regular pattern generation means), 41... Comparison circuit (comparison means), 42... Copying process control circuit (copying process control means) Applicant: Co., Ltd. Ricoh-777 Leap 20 Kuku 19 Ri β1z

Claims (1)

[Claims] An optical system that scans an original image and forms an electrostatic latent image on the photoreceptor by focusing it on the photoreceptor, a solid-state scanning element that receives light from which the optical path of this optical system is divided, and generates a regular pattern. a regular pattern generating means; a comparing means for comparing the regular pattern generated by the regular pattern generating means with the original image; and an output from the comparing means that is generated when the regular pattern and the original image match. 1. A copying function control device for a copying machine, comprising a copying process control means for controlling operations.