JP3251096B2 - Printed matter identification method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for identifying printed matter which can reliably and easily discriminate copies of various securities such as banknotes, stamps, and tickets by an electrophotographic copying apparatus.

[0002]

2. Description of the Related Art In recent years, with the progress and spread of color copier technology, color copies of securities such as banknotes have been easily obtained, which has become a social problem. The quality of the copy is so high that at first glance the authenticity cannot be identified. Among them, there are many occasions in which a copying apparatus using a dry electrophotographic method, which has a high recording speed, can record on plain paper, and has a low recording cost, is used. Therefore, effective measures are required to prevent the use of such illegally copied securities.

[0003] The conventional printed matter identification method detects a shade or color at a predetermined reading position of a printed matter and determines whether or not the detected value is within a predetermined range. Japanese Patent Application Laid-Open No. 55-9284 describes a method of detecting and determining the density of a specific position of a printed matter, and a method of detecting a density at a specific position of a printed matter along a scanning direction. Reading a data pattern divided into two, and comparing it with a model pattern to make a judgment. As described in JP-B-61-8478, a deviation from an average value of read values is compared with a reference. There are things to do.

[0004]

The identification method as described above requires a read value of a reference image (such as a bill). However, there are so many types of securities that need to be identified all over the world, and it is practically impossible to store all of these patterns in memory, and the types of securities to be identified are limited. I have to do it. Also,
Such a device is composed of optical reading means, positioning means, standard data storage means, comparison operation means, and the like, and has a problem that it is complicated and expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to eliminate the need for storage of standard images and comparison operations, and to form any printed matter with toner used in dry electrophotography. An object of the present invention is to provide a method for reliably identifying a printed matter and an apparatus for identifying a printed material with a simple configuration by applying the method.

[0006]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
Means of the invention include the following printed matter identification method and apparatus
There is . The first means is a printed matter identification method, in which a member heated to 50 ° C. or more and 250 ° C. or less is brought into contact with the printed matter, a change in the printed matter is detected, and as a result, the printed matter is mainly composed of a thermoplastic resin. it is intended to identify whether or not formed by the colored material to.

A second means is a printed matter identification method,
A member heated to 50 ° C. or higher and 250 ° C. or lower is brought into contact with the printed matter, and the presence or absence of a substance attached to the member is detected. As a result, the printed matter is formed of a coloring material mainly containing a thermoplastic resin. It is to identify whether it is a thing .

[0008] A third means is a printed matter identification method,
The printed matter is heated to a temperature of 50 ° C. or more and 250 ° C. or less by radiant heat, a change in the printed matter is detected, and based on the result, whether the printed matter is formed of a coloring material containing a thermoplastic resin as a main component is identified . There is (claim 1) .

A fourth means is a printed matter identification method,
Exposing the printed matter to an ambient temperature of 50 ° C. or more and 250 ° C. or less,
A change in the printed matter is detected, and the result is used to determine whether the printed matter is formed of a coloring material containing a thermoplastic resin as a main component (claim 2) .

The fifth means is a printed matter identification method,
At least one is held at a surface temperature of 50 ° C. or more and 250 ° C. or less, and the sheet and the printed matter are conveyed while being superposed and conveyed between a pair of rollers rotating at a constant speed while pressing each other at a constant pressure, and passed between the rollers. After that, the sheet and printed matter are peeled off, and the presence or absence of attached matter on the sheet after peeling or the change in density of the printed matter is read to determine whether the printed matter is formed of a coloring material mainly composed of thermoplastic resin. Do
(Claim 3) .

Sixth means is a printed matter identification device,
A roller whose surface is maintained at a temperature of 50 ° C. or more and 250 ° C. or less, a roller that moves on the surface of the printed matter while rotating, a detecting unit that detects the presence or absence of an adhered substance on the roller, and a display that displays a detection result of the detecting unit. means, in which a cleaning means for cleaning the surface of the roller.

A seventh means is a printed matter identification device,
A pair of rollers, at least one of which is maintained at a surface temperature of 50 ° C. or more and 250 ° C. or less, rotates while pressing with a constant pressure to move the printed matter, and checks for the presence or absence of a substance attached to any of the pair of rollers. Detecting means for detecting;
Display means for displaying the detection result of said detecting means, and a cleaning means for cleaning the surface of the roller Monodea
You .

Eighth means is a printed matter identification device,
A roller whose surface is maintained at a temperature of 50 ° C. or more and 250 ° C. or less, a roller that moves on the surface of the printed matter while rotating, reading means for reading the reflection density of the printed matter after the roller has passed, and reading results of the reading means and display means for displaying, in which a cleaning means for cleaning the surface of the roller.

The ninth means is a printed matter identification device,
A pair of rollers, at least one of which is maintained at a surface temperature of 50 ° C. or higher and 250 ° C. or lower, rotates while pressing with a constant pressure to move the printed matter, and a reflection density of the printed matter after passing through the pair of rollers. a reading means for reading, and display means for displaying the readout result of the reading means, in which a cleaning means for cleaning the surface of the roller.

[0015] A tenth means is a printed matter identification device,
A pair of rollers, at least one of which is maintained at a surface temperature of 50 ° C. or more and 250 ° C. or less, rotates at a constant speed while pressing each other at a constant pressure, and a conveyance for overlappingly conveying a sheet and a printed material between the pair of rollers. which was provided with a means, a peeling means for peeling the sheet and printed matter, a detection means for detecting the presence of deposits to the sheet after peeling, and display means for displaying a detection result of said detecting means is there
(Claim 4) .

An eleventh means is a printed matter discriminating apparatus, wherein at least one of the rollers is kept at a surface temperature of 50 ° C. or more and 250 ° C. or less, and a pair of rollers which rotate at a constant speed while pressing each other at a constant pressure. Conveying means for superimposing and conveying a sheet and a printed matter between the pair of rollers, peeling means for peeling the sheet and the printed matter, reading means for reading a reflection density of the printed matter after peeling, and reading by the reading means which was equipped with a display means for displaying the results
(Claim 5) .

The twelfth means is a printed material identifying device, the heating member in contact with the printed material printed surface heating the printed material, by adhering the printed material and the heating member, and extracts the printed matter (Claim 6) .

A thirteenth means is a printed matter identification apparatus, wherein the printed matter is heated by a heating member in contact with a printed surface of the printed matter, and the printed matter and the heating member are attached to each other.
Which it was provided with a means for peeling the printed material from the heating member
(Claim 7) .

[0019]

The first means is to apply a method to a printed material at a temperature of 50.degree.
A member heated to 0 ° C. or lower is contacted to detect a change in the printed matter and identify a coloring material of the printed matter, wherein the coloring material is a coloring material (toner) mainly composed of a thermoplastic resin.
In the case of, the coloring material is carried away by the heated member to lower the density, and when the coloring material is the printing ink, nothing changes, so that the identification becomes easy.

The second means is to contact a member heated at 50 ° C. or more and 250 ° C. or less with the printed matter, detect the presence or absence of a substance attached to the member, and identify a coloring material of the printed matter. When the coloring material is a toner, a melt of the toner adheres to the member, and when the coloring material is a printing ink, nothing changes, so that the identification can be easily performed.

The third means (Claim 1) is to heat the printed matter to a temperature of 50 ° C. or more and 250 ° C. or less by radiant heat and identify the type of the printed matter by a change in the printed matter. For example, a change such as deterioration of the resolving power due to the melted toner can be observed, and there is no such change in the printing ink.

The fourth means (Claim 2) is to print the printed matter by 50
Exposure to an ambient temperature of not less than 250 ° C and not more than 250 ° C, the type of the printed matter is identified by detecting a change in the printed matter,
As in the third invention, when the coloring material is a toner, a change such as deterioration of the resolving power due to the melted toner can be observed, and since there is no such change in the printing ink,
It can be easily identified.

The fifth means (Claim 3) is that a sheet is held between a pair of rollers which are kept at a surface temperature of 50 ° C. or more and 250 ° C. or less and are rotated at a constant speed while being pressed with a constant pressure. After passing through the rollers, the sheet and the printed matter are peeled off, and the presence or absence of attached matter on the sheet after peeling or the density change of the printed matter is read, and the printed matter is formed with toner. In the case where the toner is applied, since the melted toner adheres to the sheet, it is observed and can be easily determined.

The sixth means is a device of the second means , wherein the surface is maintained at a temperature of 50 ° C. or more and 250 ° C. or less,
A roller that moves on the surface of a printed material while rotating, a detection unit that detects the presence or absence of an adhered substance on the roller, a display unit that displays the detection result, and a cleaning unit that cleans the surface of the roller In addition, since the toner that has adhered to the roller is automatically detected and discriminated, a device that can be reliably identified and has good operability can be obtained.

The seventh means is an apparatus in another form of the second means , wherein at least one of them is kept at a surface temperature of 50 ° C. or more and 250 ° C. or less, and rotates while pressing each other at a constant pressure. A pair of rollers for moving the printed material, a detecting unit for detecting the presence or absence of an adhering substance on any of the pair of rollers, a display unit for displaying the detection result, and a cleaning unit for cleaning the surface of the roller. Since it is configured and automatically detects and discriminates what has melted toner adhered to the roller while conveying the printed matter,
An apparatus that has good identification and good operability can be obtained.

Eighth means is an apparatus of the first means , wherein the surface is maintained at a temperature of 50 ° C. or more and 250 ° C. or less,
A roller that moves on the surface of a printed matter while rotating, reading means for reading the reflection density of the printed matter after the roller has passed, display means for displaying the result, and cleaning means for cleaning the surface of the roller And
Since the image density after the toner has been melted and taken away by the roller is automatically detected, an apparatus which is reliable and has good operability can be obtained.

A ninth means is an apparatus in another form of the first means , wherein at least one of them is maintained at a surface temperature of 50 ° C. or more and 250 ° C. or less, and rotates while pressing each other at a constant pressure. And a reading unit for reading the reflection density of the printed matter after passing through the pair of rollers, a display unit for displaying the result, and a cleaning unit for cleaning the surface of the roller. Since the image density after the toner is melted while the printed matter is being conveyed and carried away by the roller is automatically detected, a device that is surely identified and has good operability can be obtained.

The tenth means (Claim 4) is the fifth means
(Claim 3) wherein at least one of the devices is 50
A pair of rollers that are maintained at a surface temperature of at least 250 ° C. and are pressed at a constant pressure and rotate at a constant speed, a unit for overlappingly transporting a sheet and a printed material between the rollers, and a sheet and a printed material , A means for detecting the presence or absence of an adhered substance on the sheet after peeling, and a means for displaying the result, after the printed matter is overlapped with the sheet and subjected to heat and pressure. When the toner is included in the image, the molten toner adheres to the sheet and is automatically detected, so that a device with reliable identification and good operability can be obtained.

[0029] The eleventh means (Claim 5) is a fifth means.
(3) A pair of rollers, wherein at least one of the rollers is kept at a surface temperature of 50 ° C. or more and 250 ° C. or less, and rotates at a constant speed while pressing each other at a constant pressure, Conveyance means for conveying the sheet and the printed matter by overlapping between the rollers, means for separating the sheet and the printed matter, means for reading the reflection density of the printed matter after peeling, and means for displaying the result And
Similar to the tenth invention, the sheet and the printed matter overlap and are subjected to the action of heat and pressure, and then peeled off, and the density of the printed matter is detected. Therefore, when the toner melt is carried away on the sheet, it can be reliably detected. .

[0030] Twelfth means (Claim 6) is to heat the printed matter by a heating member in contact with the printed surface of the printed matter, adhere the printed matter to the heating member, and extract the printed matter, It is possible to extract only the printed matter of the toner by attaching it to the heating member side by using the force of attaching the toner to the heating member.

[0031] A thirteenth means (Claim 7) is that the printed material is heated by a heating member in contact with the printing surface of the printed material, the printed material is adhered to the heating member, and then the printed material is separated from the heating member. Since only the printed matter of the toner is attached to the heating member side and extracted by using the force of the toner attached to the heating member and then separated from the heating member, it can be automatically taken out. Thus, an apparatus capable of extracting a printed matter with toner can be obtained.
In addition, among the first to thirteenth means described above, the present invention
Then, in particular, the third to fifth means and the tenth to thirteenth hands
The steps are adopted, but in the following description of the embodiments,
Therefore, the embodiments according to the first, second, fourth to ninth means will be described.
Will be explained.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the present invention, the principle of image formation by electrophotography will be described. A photoreceptor used in a copying apparatus or the like has a configuration in which a photoconductive layer made of an inorganic or organic substance is laminated on a drum or belt-like electrode mainly made of metal. Hereinafter, an image forming process by electrophotography using this photoconductor will be described. (A) The surface of the photoconductor is uniformly charged to about 500 to 1500 V (absolute value). (B) The surface is exposed to reflected (or similar) light from an original or an image-like pattern emitted from a light source such as a laser or LED, thereby lowering the potential of the light-irradiated portion, An electrostatic latent image is formed. (C) The toner is adhered to the electrostatic latent image and developed. The toner is a charged particle including a thermoplastic resin and a coloring material. (D) The toner image formed on the photoconductor is transferred to a recording material such as plain paper by electrostatic force. (E) The toner image on the recording material is fixed using heat and pressure to obtain a recorded matter.

Here, there are several methods for forming a color image. The main ones are as follows: (1) a process until a toner image is formed on a photoreceptor is sequentially performed for each color;
A method of superposing a toner image on a photoreceptor to form a multi-color image, transferring the multi-color image to a recording material and fixing the same, and (2) performing a process until a toner image is transferred to the recording material for each color.
There is a method of superposing and fixing a multicolor toner image on a recording material. In either case, when configuring the apparatus, it is conceivable to use a common exposure system for the purpose of downsizing, or to provide an exposure system exclusively for each color to achieve high speed.

The fixing process uses a common technique in any of the above cases. For this purpose, various methods have been conventionally proposed, but at present, from the viewpoint of simplification of the device configuration and safety, a method of passing a recording material holding a toner image between a heat roller and a pressure roller is proposed. Is the most widely used. In this method, the temperature of the toner and the recording material rises at the contact portion between the two rollers, so that the toner that has been in a semi-molten state is subjected to pressure to a portion having a large surface area such as a paper fiber or an uneven portion of a sheet. And brought into contact. Then, when the recording material separates from the roller, the temperature decreases, and the toner adheres as it is. It is desired that the temperature of the heat roller is as low as possible for energy efficiency and safety. In the case of a color image, in order to improve color reproducibility, it is required to smooth the surface of the toner image and make the inside of the toner image uniform.
For this reason, devices and materials are designed to increase the degree of melting of the toner and not to cause offset to the heat roller. In many cases, a release agent such as silicone oil is applied to the heat roller to prevent offset, so that the adhesive force at the interface is reduced.

Most of the toner is a thermoplastic resin, into which a coloring material such as a pigment or a dye, a charge control agent, etc. are dispersed.
Mixed. The thermal characteristics of the thermoplastic resin are determined in consideration of the compatibility with the fixing process and the storage stability. The storability means that the toner does not agglomerate during storage or transfer of the toner inside and outside the copying apparatus, and therefore, the glass transition temperature needs to be 50 ° C. or higher.
On the other hand, especially for color toners, a low softening point is required due to the above-mentioned requirement in the fixing process. In addition, the thermoplastic resin is required to be transparent in terms of color reproducibility, and to have appropriate charging characteristics and resistance in view of compatibility with the development / transfer process. As resins satisfying the above requirements, polyester resins and styrene-butyl methacrylate copolymers are often used. In addition, polystyrene, styrene-acryl copolymer, epoxy, polyamide, polymethyl methacrylate, polyvinyl butyral, and the like may be used. The fixing temperature of commercially available products is mostly set to about 150 to 220 ° C.

The present invention is an application of the offset phenomenon that occurs in the heat roller fixing method. That is, a roller, a sheet, or a block-shaped member (such as a stamp) heated to 50 ° C. or more and 250 ° C. or less is brought into contact with the printed matter, and it is formed of a toner containing a thermoplastic resin as a main component. In this case, a part of the material is melted by heat and adheres to the contacted object, and is removed. In addition, such changes due to heat do not appear in an image formed with a printing ink used in a normal printing process. For this reason, after the printed material is brought into contact with the member, the presence or absence of a substance attached to the member or a change in the printed material (such as a change in density) is detected, so that the colorant is a printing ink or a toner containing a thermoplastic resin. Can be determined. In this method, a member (a roller, a sheet, a stamp, or the like) that comes into contact with the toner needs to be a material having a high surface energy. Examples include polyester, polycarbonate, polymethyl methacrylate, polyvinyl chloride, polymer materials such as FRP and ABS resin, and metal materials such as aluminum and stainless steel. In addition, fluororesins, silicone resins, polyethylene, and the like have strong releasability and are not suitable as a material for adhering a molten toner. The surface of the above-mentioned member may be smooth, but it may be one which is provided with irregularities to generate a large adhesive force.

Hereinafter, each of the above means will be described according to the illustrated embodiment.
The configuration and operation to the corresponding described in detail. Example 1 FIG. 1 is a reference example corresponding to the first, second, sixth, and seventh means.
It is a figure which shows an Example , (a) is sectional drawing of a printed matter identification device, (b) is a perspective view of a printed matter identification device. This device includes a handle 6, a roller 1, a heater (heat source) 4, a roller cleaner (not shown), and a cover 5. The roller 1 has a cylindrical metal core 2 made of aluminum 2 and the surface thereof is covered with a polyester resin 3. A halogen lamp 4 is provided inside the roller 1 as a heat source.
It is controlled within the range of 0 ° C. Further, a cover 5 that covers the roller 1 and a handle 6 that supports the rotating shaft of the cover 5 and the roller 1 are provided. As shown in FIG. It can be rolled up. The roller cleaner is for removing the deposits on the roller, and is made of an elastic blade or the like, and is attached to the inner peripheral surface of the cover 5 or the like.

When the roller 1 rotates on the printed material 7, the surface temperature of the printed material 7 increases due to the heat of the roller 1. As a result, no change occurs when the coloring material of the printed matter 7 is the printing ink, whereas when the coloring material is the toner, the toner is melted and an adhesive force is generated between the roller and the roller surface. When 1 is separated from the printed matter 7, it is peeled from the substrate (paper) of the printed matter. Therefore, by observing this change, it can be recognized that the printed matter is formed by toner. The toner that has melted and adhered to the surface of the roller 1 is removed by a roller cleaner. In addition, in order to prevent accidents due to heat, the shutter (not shown) provided on the cover 5 is closed except when necessary, so that the roller 1 is not exposed, and the buttons and levers are operated. Then, it is desirable that the shutter be opened to be ready for use. When the surface temperature of the roller 1 falls below the lower limit (50 ° C.) of the above temperature range, the toner does not melt, and when the surface temperature exceeds the upper limit (250 ° C.), the substrate (paper) of the printed matter is deformed and cannot be used. Fear comes out.

Now, the printed matter identification device may be a device that detects an attached matter on the surface of the roller and automatically makes a determination. In this case, in addition to the above configuration, an optical sensor for measuring the reflection density of the roller surface, an arithmetic unit for determining the presence or absence of an adhering matter from the density value detected by the roller or its change, and a display unit for displaying the result Be provided. Further, a similar function can be obtained by a means for detecting unevenness on the surface of the roller instead of the optical sensor. further,
A device that detects a change in the density (or color) of a printed matter and automatically makes a determination may also be used. In this case, in addition to the basic configuration, an optical sensor that detects the density of the printed matter after the rollers have passed, an arithmetic unit that determines a change in the printed matter based on the density value detected by the roller or a change in the density value, and a display unit that displays the result Is provided.

Second Embodiment FIGS. 2A to 2C show first, second, eighth, and ninth embodiments.
FIG. 4 is a diagram illustrating a reference example of a printed matter identification method and apparatus corresponding to the means . The apparatus shown in FIG. 2A includes a heating roller 10, a pressure roller 11, a heater (heat source) 12, a heating roller cleaner 13, and a pressure roller cleaner 14.
Consists of Each roller has a core made of cylindrical aluminum, and its surface is covered with a rubber or plastic material to which the toner is easily adhered. A driving force is applied to one or both of the rollers. A halogen lamp 12 is provided inside the heating roller 10 as a heat source, and the temperature of the roller surface is controlled in a range of 100 to 250 ° C.
The printed matter 7 is conveyed between the heating roller 10 and the pressure roller 11 while applying pressure and heat. The two roller cleaners 13 and 14 are for removing deposits on the respective rollers, and are composed of elastic blades.

When the print 7 moves while being sandwiched between the two rollers 10 and 11, the surface temperature of the print 7 increases due to the heat of the heating roller 10. As a result, when the coloring material of the printed matter 7 is a toner, the toner is melted by the same operation as in the first embodiment, and an adhesive force is generated between the toner and the roller surface.
When the roller separates from the printed matter, it peels off from the substrate (paper) of the printed matter. Therefore, by observing this change, it can be recognized that the printed matter is formed by toner.
The toner that has melted and adhered to the surface of the heating roller is removed by the heating roller cleaner 13. In addition, printed matter 7
In the case where the toner image is fixed on the opposite surface, the toner also adheres to the pressure roller 11 side. In this case, the adhered toner is removed by the pressure roller cleaner 14. In order to make this effective, it is desirable to provide a heater inside the pressure roller.

Next, FIG. 2B shows the two rollers 10,
11 is an example of a printed matter identification device that detects an attached matter on the surface of No. 11 and makes an automatic determination. In this case, in addition to the above-described configuration, optical sensors 15a and 15b for measuring the reflection density on the roller surface, a calculation unit 16 for determining the presence or absence of an adhering matter from the density value detected by the sensor or a change thereof, and displaying the result The display unit 17 is provided. Further, a similar function can be obtained by means for detecting the surface unevenness of the roller instead of the optical sensor. Further, as shown in FIG. 2C, a printed material identification device that detects a change in the density (or color) of the printed material 7 and makes an automatic determination can be provided. In this case, in addition to the basic configuration, optical sensors 15a, 15a for detecting the density of the printed matter 7 after passing through the rollers 10, 11
b, Printed matter 7 from the density value detected by it or its change
This is a device provided with an arithmetic unit 16 for judging a change in the data and a display unit for displaying the result. Incidentally, in the above device example,
A configuration in which one or both of the heating roller and the pressure roller are in a belt shape is also possible.

[Embodiment 3] Next , the twelfth and thirteenth means according to the present invention will be described.
An embodiment of the printed material identification device 7) will be described. This printed matter
Identification device, instead of the configuration in the above Reference Example, in which toner adheres to the roller surface, the printed material is configured to extract utilizing going to arrive around the roller printed matter by the toner automatically There is . FIG. 3A shows an example of such an apparatus, in which, in addition to the above-described basic configuration, a separation roller 18, a transport roller 19, and a printed matter discharge tray 20 using toner are provided on the heating roller 10 side. In this printed matter identification device, when the printed matter 7 is a real banknote or the like when the printed matter 7 passes between the rollers 10 and 11, the printed matter 7 is conveyed in the direction A in the figure without adhering to the rollers. For example, in the case of a fake bill copied by a color copying apparatus, toner adheres to the surface of the heating roller, and the printed matter wraps around the heating roller 10. If the printed matter is discharged to the printed matter discharge tray 20 in the B direction, a printed matter with toner can be extracted.

By the way, the fixing temperature of the toner is 150 to 22.
If the temperature is lower than 0 ° C., for example, 100 ° C., the printed matter strongly adheres to the heating roller 10 and rotates, called cold offset. For this reason, in the configuration of FIG. 3A, the printed matter wrapped around the heating roller 10 may not be easily separated from the roller. Therefore, the apparatus shown in FIG. 3B has a heating roller 1 in addition to the configuration shown in FIG.
This is an example in which a means for peeling a printed material wound around 0 is provided. That is, the first heating member 21 and the second heating member 22 are provided inside the heating roller 10 and the first heating member 2
After the printed matter of the toner is adhered to the surface of the heating roller by 1 and extracted, the printed matter is easily separated from the heating roller 10 by reheating the toner to a fixing temperature of about 150 to 220 ° C. by the second heating member 22. It is something that can be done. As a result, the printed matter of the toner is extracted by the heating roller 10 and is heated by the second heating means 22 and the separation claw 18.
The print material is separated from the print material by the transport roller 19 and discharged to the printed material discharge tray 20.

Fourth Embodiment Next, FIG. 4 shows fifth, tenth, and eleventh means according to the present invention.
Printed matter discrimination method and apparatus according to (Claim 3, 4, 5)
Kazumi施例a diagram showing, after passing between the heating roller and the pressure roller to overlap the printed material and the sheet was peeled off the printed material and the sheet, the presence or print deposits on the sheets after removal By reading the density change, it is determined whether or not the printed matter is formed of a coloring material mainly composed of toner. FIG. 4A shows a basic configuration of the apparatus, in which a heating roller 10, a pressure roller 11, and a heater (heat source) are used.
And 12. Each of the rollers 10 and 11 is made of a core metal made of cylindrical aluminum, and its surface is covered with rubber or a plastic material as needed, and a driving force is applied to one or both of them. A halogen lamp 12 is provided inside the heating roller 10 as a heat source.
It is controlled in the range of 250 ° C. Printed matter 7 and sheet 2
When the print 3 is placed between the heating roller 10 and the pressure roller 11 with the prints 3 stacked or sandwiched between two sheets, the sheet 23 and the print 7 are conveyed while applying pressure and heat. The sheet used here must have adhesiveness to the melted toner, and for example, the above-mentioned various polymer materials are suitable. Further, it is preferable that the surface has irregularities, rather than the surface is smooth.

The printed matter 7 and the sheet 23 are two rollers 1
When the print 7 moves between 0 and 11, the surface temperature of the print 7 increases due to the heat of the heating roller 10. As a result, when the coloring material of the printed matter 7 is a toner, the toner is melted by the same operation as in the first embodiment, and an adhesive force is generated between the toner and the sheet surface. When the sheet 23 is separated from the printed matter 7 after passing between the two rollers 10 and 11, the toner in a molten state is separated from the base (paper) of the printed matter and adheres to the sheet 23. Therefore, by observing this change, it can be recognized that the printed matter is formed by toner. In addition, it is desirable to provide a heater inside the pressure roller so as to be effective for printed matter having toner fixed on both sides. Also, to separate the sheet from the printed matter,
A separation claw may be provided on the transport outlet side.

Next, FIG. 4B shows an example in which a change in the density (or color) of the printed matter 7 or the sheet 23 is detected and the judgment is made automatically. In this case, in addition to the basic configuration of FIG. 9A, a sheet separating claw 24 for separating the printed matter 7 from the sheet 23, and an optical sensor 15 for detecting the density of the printed matter or the sheet 23 after the sheet 23 is separated.
a, 15b, an arithmetic unit 16 for judging a change in the printed matter from the detected density value or its change, and a display unit 17 for displaying the result.

[Embodiment 5] Next, as still another embodiment of the printed matter identification method and apparatus according to the present invention, the printed matter may be identified by pressing a stamp-shaped member against the printed matter. In this case, the material of the stamp-like member is suitably a heat-resistant rubber material or the like.
A device provided with such a stamp-shaped member is provided with a means for detecting the presence or absence of an adhering substance on the member, and a function of notifying the presence of the adhering substance with a lamp or a buzzer when the presence of the adhering substance is detected is added. You may. It is also possible to use the force of toner adhesion to a heated stamp to identify printed matter according to the magnitude of the force applied to the stamp, which is particularly effective for securities and stamps.

[0049] [Example 6] Next, as an embodiment of a printed material identification method and apparatus according to a third means according to the present invention (claim 1), irradiated with infrared lamp against the printed material, the temperature by radiant heat Rise,
FIG. 5 shows an apparatus for discriminating from changes in printed matter. That is, in the apparatus shown in FIG. 5, the printed matter 7 is conveyed by the belt 25 and is printed by the infrared lamp 26 inside the apparatus.
After being irradiated with infrared light, it is carried out. In this case, the surface temperature of the print 7 is controlled in the range of 50 to 250 ° C. At this time, if the print 7 is made of toner, the toner on the surface is melted by the temperature rise, and the resolution is deteriorated. Further, if the surface of the printed matter 7 is rubbed, the image changes. However, such a change does not occur if the ink is colored with the printing ink. Therefore, it can be easily identified in this way. By applying heat to the printed matter in a non-contact manner, this device has no contamination with the molten toner,
It has the feature that maintenance is easy.

[0050] [Embodiment 7] Next, as an embodiment of a printed material identification method and apparatus according to a fourth means according to the present invention (Claim 2), increasing the temperature by exposing the printed material to high temperature atmosphere FIG. 6 shows an apparatus for performing the identification based on the change in the printed matter. That is, in the apparatus shown in FIG. 6, the printed matter 7 is securely gripped by the gripper 27, and the printed matter 7 is transported in a high-temperature atmosphere created by the sheet heater 28, and the temperature of the printed matter 7 is increased there. At this time,
The surface temperature of the print 7 is controlled in the range of 50 to 250 ° C. As in the case of the sixth embodiment, if the printed matter is made of toner at this time, the toner on the surface is melted by the temperature rise, and the resolution is deteriorated. Further, if the surface of the printed matter 7 is rubbed, the image changes. However, such a change does not occur if the ink is colored with the printing ink. Therefore, it can be easily identified in this way.

[0051]

As described above, the method and apparatus for identifying printed matter according to the present invention do not require storage of standard images and comparison operations as in the prior art. What is formed by the used toner can be reliably identified. Therefore, according to the present invention, securities and the like illegally copied by an electrophotographic copying apparatus or the like can be easily identified and extracted, and their use can be prevented.

[Brief description of the drawings]

1A and 1B are diagrams showing a reference example, in which FIG. 1A is a cross-sectional view of a printed matter identification device, and FIG. 1B is a perspective view of the printed matter identification device.

FIGS. 2A and 2B are diagrams showing another reference embodiment , in which FIG. 2A shows the basic configuration of a printed material identification device, and FIGS. 2B and 2C show examples of the configuration of a printed material identification device provided with automatic identification means. FIG.

FIG. 3 is a diagram showing one embodiment of the present invention, wherein (a),
FIG. 2B is a diagram illustrating a configuration example of a printed material identification device including a printed material extracting unit using toner.

4A and 4B show another embodiment of the present invention , in which FIG. 4A shows a basic configuration of a printed material identification device, and FIG. 4B shows a configuration example of a printed material identification device provided with automatic identification means. It is.

FIG. 5 is a configuration explanatory view of a printed matter identification apparatus showing still another embodiment of the present invention.

FIG. 6 is an explanatory diagram of a configuration of a printed matter identification apparatus showing still another embodiment of the present invention.

[Explanation of symbols]

 1, 10: Heating roller 4, 12: Heater (halogen lamp, etc.) 5: Cover 6: Handle 7: Printed material 11: Pressure roller 13: Heating roller cleaner 14 ... Pressurizing roller cleaner 15a, 15b ... Optical sensor 16 ... Calculator 17 ... Display 18 ... First heating means 22 ... Second heating means 23 ... Sheet 24 ... Sheet separating claw 25 ... Conveyer belt 26 ... Infrared lamp 27 ... Gripper 28 ... Sheet heater

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Morio Onoe 1-3-6 Nakamagome, Ota-ku, Tokyo, Ricoh Co., Ltd. (56) References JP-A-2-171646 (JP, A) JP-A-48-23340 (JP, A) JP-A-60-140149 (JP, A) Japanese Utility Model Application Sho-58-145546 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 25 / 02 B41M 3/14 B65H 43/08 G03G 15/08

Claims (7)

(57) [Claims] 1. A printed material is heated to 50 ° C. or more and 250 ° C. by radiant heat.
A printed matter identification method characterized by heating to the following temperature, detecting a change in the printed matter, and identifying from the result whether the printed matter is formed of a coloring material containing a thermoplastic resin as a main component. 2. An atmosphere at a temperature of 50 ° C. to 250 ° C.
A method for identifying a printed matter, comprising exposing the printed matter to a temperature, detecting a change in the printed matter, and identifying from the result whether the printed matter is formed of a coloring material containing a thermoplastic resin as a main component. 3. At least one of them is 50 ° C. or more and 250 ° C. or less.
Is maintained at the surface temperature of
Sheet and printed matter between a pair of rollers rotating at a constant speed
Are stacked and conveyed, after passing between the rollers, the sheet and
Peel the printed material and check for any adhering matter to the sheet after peeling
Alternatively, a printed matter identification method characterized by reading a change in density of the printed matter and identifying whether the printed matter is formed of a coloring material containing a thermoplastic resin as a main component. 4. At least one of them is 50 ° C. or more and 250 ° C. or less.
Is maintained at the surface temperature of
A pair of rollers rotating at equal speeds, and the pair of rollers
Transporting means for transporting the sheet and the printed matter in between the sheets,
Peeling means for peeling off the sheet and printed matter, and after peeling
Detecting means for detecting the presence or absence of a substance attached to the sheet,
Display means for displaying a detection result of the detection means.
A printed matter identification device, characterized in that: 5. At least one of them is 50 ° C. or more and 250 ° C. or less
Is maintained at the surface temperature of
A pair of rollers rotating at equal speeds, and the pair of rollers
Transporting means for transporting the sheet and the printed matter in between the sheets,
Peeling means for peeling off the sheet and printed matter, and after peeling
Reading means for reading the reflection density of the printed matter,
Display means for displaying a reading result of the reading means.
Printed materials identification device, characterized in that the. 6. A heating member in contact with a printing surface of a printed material.
Heating the printed matter, causing the printed matter and the heating member to adhere,
A printed matter identification device for extracting the printed matter. 7. A heating member in contact with a printing surface of a printed matter.
Heating the printed matter, causing the printed matter and the heating member to adhere,
Thereafter, a means for peeling the printed matter from the heating member is provided.
A printed matter identification device.