KR101775526B1 - Printing paper distinguish device unit of image forming system for maintenance of public security - Google Patents

Abstract

The identification unit of the security recording medium according to the present invention is characterized in that the identification unit of the security recording medium includes a storage unit for storing the security recording medium, a pickup roller for picking up the security recording medium, a printing unit for printing information on the security recording medium, And a conveyance path for conveying the security recording medium from the storage section, wherein in the image forming apparatus for printing information on a security recording medium in which a plurality of micro-wires are dispersed and mixed in a substrate as a detection substance, Wherein the distance between the micro-wires located closest to the micro-wires is less than 30 mm, 2) the length of the micro-wires is greater than 0.5 mm and less than 10 mm, And 3) the length of the micro-wire divided by the distance from the center of gravity of the micro-wire to the nearest end And a sensor module for detecting presence or absence of the microwire embedded in the security recording medium, wherein the sensor module includes a driving shaft of the pickup roller, a region adjacent to the pickup roller, And may be installed in at least one of the conveyance paths.

Description

Technical Field [0001] The present invention relates to a printing paper distinguishing device unit for image forming system,

The present invention relates to a security recording medium identification unit provided in an image forming apparatus such as a printer or a copying machine. More particularly, the present invention relates to a security recording medium identification unit, Such as a printer or a copying machine, to identify the authenticity of the security recording medium made up of the security recording medium.

In recent years, as security issues such as illegal leakage of information within organizations such as public organizations and companies and leakage of personal information of individuals have become socially issues, the awareness and interest about security importance of internal information is increasing day by day. Accordingly, organizations such as various corporations and organizations are strengthening security activities for internal information through various security management systems and solutions in order to effectively prevent illegal leakage of internal information.

That is, in order to prevent unauthorized leakage of internal information, it is necessary to prevent the security of the office equipment such as copiers, multifunction apparatuses and printers from physical methods such as prohibiting or controlling the loading / unloading of mobile storage devices or storage media such as notebooks, cameras, Various security management systems and solutions such as electronic document security and database security are being introduced.

In particular, as the necessity of controlling the export of the storage medium storing the security information as well as the control of the export of the printed document increases, it is desired to attach the detection tag to the security document to prevent the security information from being exported to the document form There can be an attempt.

For example, as a document security solution for controlling illegal leakage of important documents from the generation of information in the form of electronic documents inside an organization to the use and disposal of the organization, a detection tag is attached to a security document to prevent unauthorized removal Method can be applied.

In this case, a detection gate may be provided at an entrance to detect a document with a detection tag attached thereto through the detection gate, thereby outputting an alarm signal to prevent the document from being carried out. To this end, an electromagnetic (EM) type security gate for sensing the magnetic body using a magnetic body can be installed at the entrance of the robot.

On the other hand, Korean Patent No. 10-0884090 discloses a strip type security paper. In the strip type security paper, the detection strip applied to the strip type security paper is expensive. Therefore, it is usually implemented by inserting about two to three sheets of expensive strips on one sheet of paper.

In this case, the conventional strip-type security strip is capable of removing the strip easily after printing, and it is possible to remove the strip only after stripping the strip portion to print the security information, Can occur. That is, since the user can easily identify the presence of the detection strip, the detection strip is intentionally damaged or removed to illegally leak the security document.

On the other hand, Korean Patent No. 10-1174078 discloses a printing paper discriminating apparatus for security. In the security printing paper distinguishing device, a security paper detection sensor is provided in the paper storage cassette, and only the security printing paper is identified to control the paper supply in the cassette before the printing paper is supplied to the printing device. In this case, even if the paper loaded in the cassette is a thin plain paper, and there is a secure paper under it, it may happen that the plain paper placed thereon by the secure paper located below is also identified as the secure paper There is a problem.

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KR 0884090 B KR 1174078 B KR 1195116 B KR 1265900 B

The present invention provides a micro-wire-type detecting material capable of recognizing a substance for detection of a security sheet containing a minute size so as to prevent the removal of a security document through intentional destruction or removal of a substance to be detected. And to provide a recording medium identification unit for security of the image forming apparatus.

The identification unit of the security recording medium according to an embodiment of the present invention may include a storage unit for storing the security recording medium, a pickup roller for picking up the security recording medium, a printing unit for printing information on the security recording medium And a conveyance path for conveying the security recording medium from the storage portion, wherein in the image forming apparatus for printing information on a security recording medium in which a plurality of microwires are dispersed and mixed in a substrate as a detection substance, Wherein the distance between the micro-wires located closest to the micro-wires is less than 30 mm, 2) the length of the micro-wires is less than 0.5 mm And 3) a value obtained by dividing the length of the micro-wire by the cross-sectional diameter of the micro-wire is greater than 170 and less than 1700 And a sensor module for detecting presence or absence of the microwire embedded in the security recording medium, wherein the sensor module includes a driving shaft of the pickup roller, a region adjacent to the pickup roller, And may be installed in at least one of them.

The diameter of the microwire may be between 0.5 and 40 um.

The security recording medium may contain at least 80% of microwires satisfying the above conditions.

A value obtained by dividing the number of the micro-wires having an angle (acute angle) of less than 45 degrees with the straight line parallel to the longitudinal axis of the security recording medium by the number of the micro-wires of 45 degrees or more is larger than 0.3 and smaller than 3.

The sensor module may be installed so as to be movable in a direction perpendicular to a transport direction in which the security recording medium is transported.

Two or more of the sensor modules may be installed to be spaced apart from each other in a direction perpendicular to the transport direction in which the security recording medium is transported.

The security recording medium may be divided into three or more areas in the transport direction in which the security recording medium is transported and may be identified as the security recording medium when the security recording medium is recognized in three or more areas.

The sensor module may include a non-contact proximity sensor.

According to the recording medium identification unit for security of the image forming apparatus according to the present invention, by allowing the micro-wire type detection material to recognize the detection material of the security paper including the minute size, it is possible to prevent deliberate destruction Or removal of the security document through removal can be prevented.

1A to 1C are schematic sectional views for explaining a security recording medium applied to be recognized by the recording medium identification unit for security of the image forming apparatus according to the present invention,
FIG. 1D is a schematic plan view for explaining a security recording medium applied to be recognized by the recording medium identification unit for security of the image forming apparatus according to the present invention,
2 is a schematic diagram showing a state in which a security recording medium identification unit according to the present invention is installed in an image forming apparatus,
FIG. 3 is a schematic exploded perspective view illustrating the recording medium identification unit for security of the image forming apparatus according to the present invention shown in FIG. 2,
4 is a schematic perspective view showing a state in which a recording medium identification unit for security of an image forming apparatus according to another embodiment of the present invention is installed on a pickup roller,
5 is a schematic diagram showing a state in which a security recording medium identification unit according to another embodiment of the present invention is installed on a paper conveyance path of an image forming apparatus;
FIG. 6 is a schematic perspective view showing a recording medium identification unit for security of the image forming apparatus according to the present invention shown in FIG. 5,
FIG. 7 is an operation flowchart illustrating an exemplary method of identifying a security recording medium by a security recording medium identification unit according to the present invention.
8 is a graph schematically showing experimental results of the wire flatness according to the wire cross-sectional diameter,
9 is a graph schematically showing experimental results of recognition rate and detection rate according to wire conditions,
10 is a graph schematically showing experimental results of the recognition rate according to the wire length,
11 is a graph schematically showing the experimental result of the yield of the secure paper according to the wire length,
12 is a graph schematically showing the experimental result of the detection rate according to the wire condition (similar aspect ratio).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a recording medium identification unit for security of an image forming apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The following description and accompanying drawings are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. As used herein, the term " recording medium " refers to a printable recording medium such as paper or film.

1A to 1D are respectively a cross-sectional view and a planar view of a security recording medium adapted to be recognized by a recording medium identification unit for security of an image forming apparatus according to the present invention, wherein a printable substrate 10 The detection substance 11 sensitive to the detection system having the sensor unit and the like is mixed into a finely pulverized and dispersed state.

Here, the reference numeral 12 denotes a shield layer provided for clarifying the image quality of paper to improve whiteness. And reference numeral 13 denotes an undercoat layer which is introduced for improving the adhesion between the detection substrate layer 10 and the shielding layer 12. [

Micro wirings can be applied to the detection material 11, and a security recording medium is formed by dispersing and mixing a plurality of micro wirings 11 in the substrate 10, and is used for security of the image forming apparatus according to the present invention And can be recognized and identified by the recording medium identification unit 100. [

The security recording medium 10a according to the embodiment of the present invention can be formed so that a large number of microwires 11 are dispersed and mixed in the substrate 10 evenly throughout the security recording medium, It can be recognized as a security recording medium and permitted to be printed only when a detection substance is recognized for a substantial part or more of the security recording medium 10a.

On the other hand, strip-type security paper may be used as a normal security recording medium. At this time, in the strip type security paper, the price of the detection strip applied as the detection material is high, so that it is implemented by inserting two to three detection strips in one sheet of security paper. In this case, the security paper with the strip-type detection strip can easily remove the strip after printing, and it is difficult to control the information removal by stripping only the strip after printing the security information by deflecting only the strip portion . That is, since the user can easily identify the presence of the detection strip, the detection strip can be intentionally undermined or removed to illegally leak the security document.

Further, in a normal security recording medium, security information can be unlawfully leaked by cutting out only a portion where no detection strip exists after printing the security information in an area where the detection strip for security paper does not exist .

The security recording medium 10a according to the embodiment of the present invention is a security recording medium 10a according to the embodiment of the present invention in which a large number of micro wirings 11 are formed on the substrate 10 through the first half of the security recording medium, And has a structure that is uniformly dispersed and incorporated. Therefore, the security recording medium 10a has a structure in which it is difficult to separate only the detection substance, and it is possible to prevent illegal leakage of the security document by damaging or removing only the detection substance in the base material 10. [

In addition, the security recording medium identification unit according to the embodiment of the present invention is not limited to inspecting the security detection material in only a part of the security recording medium 10a, but may detect security for all areas of the recording medium 10a It is possible to prevent leakage of the security information by carrying out only a part of the security information after printing the security information in the area where there is no security detection material of the security recording medium.

Therefore, when information is output from an image forming apparatus such as a copying machine or a printer equipped with the security recording medium identification unit 100 according to the present invention, It is possible to effectively prevent the leakage of illegal information.

That is, by the micro-wire type security recording medium 10a and the information ejection control system using the security recording medium identification unit according to the embodiment of the present invention, 10a can perform output only in the case of a complete security recording medium 10a in order to prevent information from being exported due to the destruction of the security recording medium 10a, I will be able to.

To this end, the security recording medium 10a has a micro-wire 11 having a diameter of 0.5 (mm) so that a number of micro-sized micro-wirings 11 as a detection material can be configured to be uniformly dispersedly incorporated into the substrate 10. [ ~ 40um can be applied. At this time, micro-wires of 0.5 microns or less are difficult to be uniformly produced in the present manufacturing technology, and magnetic properties as a sensor tend to drop sharply. If it is bigger than 40 microns, it is easily recognizable, so it is not visually visible and it is considerably larger than the thickness of the paper, so the smoothness of the paper is deteriorated. This is as shown in FIG. FIG. 8 shows a test result of the smoothness according to the wire cross-sectional diameter. It is shown that when the diameter of the manufactured paper is 80 to 110 μm, when the diameter is larger than 40 microns, the smoothness of the paper is drastically deteriorated.

 In order to ensure that the security recording medium 10a is well detected even in an electromagnetic (EM) security gate and is properly identified in the security paper identification unit, micro-wire security that contains 80% or more of the micro- May be used. At this time, it is preferable that the number of the micro-wires satisfying the conditions described below among the detection materials included in the entire security sheet is 80% or more.

At this time, if the detection material contained in the security paper is a security paper consisting of 100% of micro-wires satisfying the conditions described in this specification, it is a perfect product. However, at least 80% It can be used as security paper. This is because at least 80% of the wires contained as the material for detection are detectable within the error range of the security gate when microwires satisfying such conditions are used.

At this time, it is possible to use a fake wire within about 20% of all the wires or a wire which does not satisfy at least one of the above conditions. Although all the conditions described below in this specification can be made to satisfy all 100% of the detection material in the manufacture of security paper, in this case, the manufacturing cost may be increased, and the wire which does not satisfy the conditions for various reasons of the manufacturing process May be included. Obviously, if the defective ratio is held, it may be advantageous in terms of manufacturing cost. Naturally, it can also be manufactured by inserting microwire 20 to 30% more than the detection limit.

1) the distance between the closest micro-wires < 30 mm,

2) 0.5 mm < micro-wire length < 10 mm,

3) 170 <length of micro-wire / cross-sectional diameter of micro-wire <1700,

4) 0.3 < Wm / Wc < 3

That is, the microwire dispersed and mixed in the base material 10 has the following characteristics: 1) the distance between the microwires positioned closest to each other is smaller than 30 mm; 2) the length of the microwire is larger than 0.5 mm and smaller than 10 mm; 3) the value obtained by dividing the length of the micro-wire by the cross-sectional diameter of the micro-wire is greater than 170 and less than 1700; and 4) the angle of incidence, which is an acute angle with a straight line parallel to the longitudinal axis of the security recording medium, (Wc) divided by the number of microwires (Wc) of not less than 45 degrees is greater than 0.3 and less than 3, can be satisfied. On the other hand, in the condition 1), as shown in FIG. 1D, there may be microwires overlapping each other in manufacturing, so it is meaningless to set the lower limit value.

First, in the case of condition 1), if the distance between the micro-wires closest to each other is longer than 30 mm, the recognition recognition rate in the unit tends to decrease. As a result, it was found that the identification unit correctly identifies when the distance between the micro-wires nearest to any micro-wire is within 30 (see FIG. 9).

The identification unit according to an embodiment of the present invention is a unit for detecting a sensor wire uniformly distributed on a sheet of paper due to the difference from the conventional technology. Therefore, if the distance is large in the wire identification, it can be judged that the wire does not have a distribution and the wire-free paper portion is included in the unit. Also, if the wires are too far apart, there may be a problem of printing between them as seen from the disadvantages of existing products.

In this case, when the distance between the microwires dispersed and mixed in the substrate 10 and the microwires 11 located nearest to each other is less than 30 mm, the following remarkable effect is obtained.

In the micro-wire type security recording medium 10a, although the micro-wires 11 as the security detection material are uniformly dispersed evenly throughout the substrate 10, even if the dispersibility thereof is slightly small, The difference may not occur. However, since the identification material of the security recording medium must identify the detection substance with respect to the entire area of the paper, if the dispersibility of the micro wire 11 distributed in the base material 10 is deteriorated, the identification recognition rate may decrease .

This is because the recognition rate in the identification unit becomes equal to or higher than the reference recognition rate necessary for identification in the case where the distance between the microwires dispersed and mixed in the substrate 10 and the microwires located nearest to the identification unit is less than 30 mm , The security recording medium can be properly identified.

As shown in the graph of the relationship between the recognition rate and the detection rate according to the wire condition in Fig. 9, when the distance between the wire and another wire is 30 mm or more, the recognition rate reaches almost 100%, and when the recognition rate becomes almost 100% , It can be said that it functions best as security paper. Therefore, it is preferable that the distance between the micro-wires in which the micro-wires 11 dispersed and mixed in the substrate 10 are located closest to each other is smaller than 30 mm.

As described below, the detection rate is the presence or absence of detection at the security gate, and the recognition rate can be the presence or absence of detection at the identification unit used in the printer. For example, the detection at the security gate is not related to the number of all the micro-wires included in one sheet of A4 paper, whether the spacing is 30 mm or more, but the identification unit is a micro- The spacing can be an important factor because the distribution is important.

On the other hand, the total recognition rate can be a recognition rate that simultaneously considers the recognition rate according to the wire condition and the recognition rate according to the wire length, and the recognition rate according to the wire condition and the recognition rate according to the wire length can be expressed as a product. In this case, if the recognition rate according to the wire condition is set to 70% or more (see FIG. 9) and the recognition rate according to the wire length is set to 70% or more (see FIG. 10) To 0.7 x 0.7 = 49%, and the recognition rate may drop to 50% or less. In this case, if the distribution ratio of 30 mm or more is 20% or less, the recognition rate may be 70% or more.

Next, regarding the condition 2), when the length of the microwire 11 dispersed and mixed in the substrate 10 is larger than 0.5 mm and smaller than 10 mm, the following remarkable effect is obtained.

When the length of the microwire is less than 0.5, the recognition rate in the identification unit drops. This seems to be the limit of the sensing power of a sensor that recognizes it closely. In addition, when the length of the micro-wires is greater than 10, the dispersibility of the micro-wires during manufacture of the security recording medium may deteriorate and the bundle may be generated, resulting in a low yield and a high cost of the security recording medium.

In the relation of the recognition rate according to the wire length in Fig. 10, the recognition rate was detected at intervals of 0.5 mm within 1 mm, and the recognition rate was detected at intervals of 1 mm at intervals of 1 mm or more. In this case, the recognition rate becomes larger than 70% from the case where the wire length is larger than 0.5 mm, that is, 1 mm. In addition, when the yield according to the wire length in FIG. 11 is examined, it can be seen that the yield drops sharply to 60% or less when the wire length is larger than 10 mm.

Regarding the condition 3), when the value obtained by dividing the length of the microwire 11 dispersed in the base material 10 by the cross-sectional diameter of the micro-wire 11 is larger than 170 and smaller than 1700, the following remarkable effect is obtained .

When the micro-wire length / micro-wire cross-sectional diameter, which can be regarded as a similar aspect ratio, is less than 170, the sensing unit is detected well in the identification unit, but the detection rate detected in the security gate drops sharply. When the value is greater than 170, the detection rate detected by the security gate and the recognition rate sensed by the identification unit may be equal to or greater than a necessary reference value.

Also, when the similar aspect ratio is larger than 1700, it corresponds to a case where the diameter of the micro-wire is very small or the length of the micro-wire is very large. However, it is not easy to produce the micro- Is difficult to produce. On the contrary, the increase in the length of the micro-wire may cause a problem in the dispersibility of the wire and cause a rise in the price as described above.

As can be seen from the relationship of the detection ratio according to the similar aspect ratio, for example, the wire condition of FIG. 12, when the value is larger than 170, the detection rate reaches almost 100%. At this time, when the maximum length of the wire is calculated to be 10 mm, the cross-sectional diameter becomes 0.588 μm at 1700. At this time, the detection rate indicates whether or not detection is performed in the security gate, and the recognition rate indicates whether or not detection is performed in the identification unit used in the printer. In the security gate, the magnetic characteristic is an important factor, and in the identification unit, whether it is a specific metal or not can be a discriminating factor. Of course, even in the case of the identification unit, the magnetic characteristic can be detected, but the cost is increased and the equipment tends to become complicated. That is, in the identification unit, it is possible to implement the identification unit even at a small cost by detecting whether or not it is a specific metal rather than detecting it as a magnetic property.

Regarding condition 4), the value (Wm) divided by the number of microwires (Wc) of 45 degrees or more divided by the number of microwires (Wm) having an acute angle of less than 45 degrees with the straight line parallel to the longitudinal axis of the security recording medium is larger than 0.3 The following remarkable effect is obtained.

It is also important that the micro-wires are well dispersed in the substrate, but the orientation of the wires is also important. That is, for each security recording medium (for example, in an A4-size sheet), the number of wires having an angle of 45 degrees or more at an acute angle when a straight line parallel to the longitudinal axis corresponding to the conveying direction meets the micro- And the number of wires having an angle less than 45 degrees is Wm, it may be necessary to satisfy the following expression: 0.3 <Wm / Wc <3.

When the value of Wm / Wc satisfies the condition, there is no problem because both the security gate and the identification unit recognize and recognize well. However, if the above condition is not satisfied, there is no problem in the identification unit, but in the security gate, Can occur.

On the other hand, the identification unit for identifying the security recording medium 10a, in which a plurality of micro-sized micro-wirings 11 as detection materials are uniformly dispersed and incorporated in the substrate 10, Direction, and when the security recording medium is recognized in three or more areas, it can be identified by the security recording medium. For example, the security recording medium can be divided into a front portion, a middle portion, and a rear portion based on the transport direction, and the security detection material can be recognized at least once in each region.

In this case, since the detection material is evenly dispersed in the security recording medium 10a, it is possible to uniformly identify the entire area of the security recording medium, thereby making it possible to print on the area where there is no security detection material, Thereby preventing the security from being avoided by taking out the security paper, thereby improving the security performance.

 On the other hand, in a conventional apparatus for distinguishing a printing paper for security, a security paper detection sensor is provided in a paper storage cassette, and only the security printing paper can be identified, and the paper supply can be controlled in the cassette before the printing paper is supplied to the printing apparatus. In this case, even if plain paper placed on the cassette is a thin plain paper and there is a security paper under it, the plain paper placed thereon by the security paper placed thereunder is also identified as security paper, The security information is outputted to the plain paper instead of the plain paper, and the plain paper to which the security information is outputted passes through the security gate, so that the security may fail.

However, the security recording medium identification unit according to an embodiment of the present invention includes a sensor module for detecting presence or absence of the microwire embedded in the security recording medium, and the sensor module detects the existence of the microwire embedded in the security recording medium, The area adjacent to the roller, and the transport path. Accordingly, it is possible to prevent the security information from being output illegally to the plain paper stacked on the security paper.

2 shows a state in which the security recording medium identification unit 200 according to the embodiment of the present invention is installed around a paper pickup roller 111 installed in an image forming apparatus (not shown) such as a copying machine or a printer And FIG. 3 is a schematic exploded perspective view illustrating the security recording medium identification unit 100 according to the present invention shown in FIG.

2 and 3, the security recording medium identification unit 200 according to the present invention is a security recording medium identification unit for identifying the security driving state of the paper pick-up roller 111 of the image forming apparatus (not shown in all of the figures) such as a printer, A bracket member 210 installed to be rotatable with respect to the housing frame 110 of the image forming apparatus so as to be selectively proximate to or spaced apart from the paper pickup roller 111 according to the rotation of the paper pickup roller 111, A support panel 220 mounted on the support panel 220 so as to selectively or closely contact the paper pickup roller 111 in accordance with the rotation of the bracket member 210, A friction pad 230 having at least one open window W for forming a noncontact portion in tight contact with the support panel 220 and a sensor module 240 installed between the support panel 220 and the friction pad 230 ) .

In the security recording medium identification unit 200 according to the present invention having the above-described configuration, the bracket member 210 is installed to be elastically biased by the elastic body 210d coupled to the bottom surface protrusion 210c At the same time, the rear end is rotatably coupled to the housing frame 110 of the image forming apparatus by the hinge shaft 210h. Accordingly, as the pickup roller 111 rotates, the bracket member 210 is lifted up, and the security recording medium 10 loaded on the cassette 120 is picked up and taken out onto the paper conveyance path. At this time, the friction pad 230 provided on the support panel 220 of the bracket member 210 and the coupling member 231 for coupling described later are inserted into the cassette 120, So that only one recording medium 10 is controlled to be taken out.

The support panel 220 is fixed to the bracket member 210 such that the engaging portions (not shown) protruding from the bottom surface of the bracket member 210 fit into the engaging holes 210a and 210b of the bracket member 210 to support the friction pad 230 and the sensor module 240 And is fixed by the clip member 214 in the coupled state. Reference numeral 121 denotes a support plate installed on the housing frame 110 so as to lift up the rear end of the cassette 120.

The friction pad 230 is provided to provide the grounding stability of the pickup roller 111. The friction pad 230 is preferably formed of a sheet material capable of providing frictional force such as cork or felt, At least one open window W is formed so that the sensor member S is exposed.

The sensor module 240 is formed on the circuit board C so as to form a package in which at least one sensor member S is mounted.

The sensor member S may be a contactless proximity sensor such as a magnetic sensor and may be provided to maintain a distance of less than 1 cm from the security recording medium 10 transported by the pickup roller 211 desirable.

That is, when the sensor member S detects presence or absence of the detecting substance incorporated in the security recording medium 10, that is, the presence of the soft magnetic material element, the oscillation of the circuit board C and the detection and output circuit (Not shown) of the image forming apparatus through signal information. Accordingly, the control unit (not shown) of the image forming apparatus can identify the authenticity of the security recording medium 10 to control the driving in the normal information output mode or the driving in the information output stop mode.

On the other hand, the identification unit 200 including the sensor module 240 may be installed in an image forming apparatus such as a printer or a copying machine. The image forming apparatus may include a storage section, a pickup roller, a printing section, and a conveyance path. The storage unit may include the cassette 120 in which the security recording medium is housed. The pickup roller picks up the security recording medium and can include the paper pickup roller 111 of the embodiment of the drawing. The printing unit (not shown) can print information on the security recording medium. The conveyance path may correspond to a path for conveying the security recording medium from the storage unit to the printing unit.

Meanwhile, the sensor module 240 may be installed to be movable in a direction perpendicular to the transport direction in which the security recording medium 10a is transported. In this case, while the security recording medium 10a is taken out from the cassette 120 and fed, the sensor module 240 can be moved in synchronization with the feeding of the recording medium or a predetermined time interval in the direction perpendicular to the feeding direction . Therefore, by making it possible to identify, in the entire area, the detection material evenly dispersed in most areas of the security recording medium 10a, the recognition accuracy of the security recording medium can be improved.

For this purpose, the bracket member 210 can move along the hinge axis 210h. In this case, when a pattern is formed on the surface contacting the pickup roller 111 and the surface of the pickup roller 111 with the security recording medium 10a of the sensor module 240 interposed therebetween, 240 may be moved in a direction perpendicular to the transport direction. At this time, the bracket member 210 may be configured as a free end that can be freely transferred along an axis through which the hinge shaft 210h is inserted. As another embodiment, the bracket member 210 may be configured to be transported by a separate driving unit.

As another embodiment for this purpose, two or more identification units may be provided so as to be spaced apart in a direction perpendicular to the conveying direction in which the security recording medium is conveyed. In this case, the detection accuracy of the security recording medium can be improved by making it possible to identify the detection substance evenly dispersed in the most area of the security recording medium 10a in the entire area.

As described above, a plurality of sensor modules are provided so as to be movable in a direction perpendicular to the transport direction or spaced apart in a direction perpendicular to the transport direction, so that the detection materials dispersed evenly in most areas of the security recording medium 10a The technique for improving the recognition accuracy of the security recording medium can be applied to the embodiment shown in Figs. 4 and 5 as well.

A detailed description of the operation of the recording medium identification unit 200 for security of the image forming apparatus according to the present invention will be given later with reference to FIG.

4 is a schematic perspective view showing a state in which a recording medium identification unit for security of an image forming apparatus according to another embodiment of the present invention is installed.

4, the security recording medium identification unit 300 according to another embodiment of the present invention is configured to support both ends of the driving shaft 111a of the paper pickup roller 111 of the image forming apparatus A cylindrical sensor housing 310 detachably coupled to at least one of the coupling holes 131 of a pair of flange members 130 installed in a housing frame (not shown) 310 and a sensor module 320 installed inside the sensor module 320.

The sensor housing 310 has a hollow portion (not shown) on a central axis line and a collet-type socket portion 311 at one end of the body. The drive shaft 111a of the paper pickup roller 111 is coupled to the sensor housing 310 so that the sensor housing 310 is coupled to the sensor housing 310 in a state in which the socket portion 311 of the sensor housing 310 is detachably coupled to the shaft hole 130a of the flange member 130. [ Contact state with the output shaft of the drive motor M in a state of being inserted into the shaft hole 130a of the flange member 130. [ Reference numeral 132 denotes a coupling member for coupling the drive shaft 111a of the paper pickup roller 111 and the output shaft of the drive motor M. [

Therefore, the sensor housing 310 is installed to be fixed to the flange member 130 in a cantilever state regardless of the rotation of the paper pickup roller 111 and the drive shaft 111a.

At least one open window W is formed in the body of the sensor housing 310 so that the sensor member S of the sensor module 320 described later is exposed.

According to the present invention, the sensor housing 310 corresponds to a pair of flange members 130 provided on a housing frame (not shown) so as to respectively support both ends of a driving shaft 111a of the paper pickup roller 111 It is preferable that one pair is provided.

The sensor housing 310 is required to have a proper length so as to have an area overlapping a predetermined width at the edge of the security recording medium 10 conveyed by the paper pickup roller 111. [ Accordingly, the detection accuracy can be enhanced by allowing the sensor member S of the sensor module 320, which will be described later, to detect the presence or absence of the detection substance at both sides of the security recording medium 10 at the same time. According to the detection method of the detection material, for example, even if the sheet is intentionally cut in the longitudinal direction to graft the plain sheet, the authenticity can be effectively identified and detected, so that more precise and strict control can be efficiently performed Document security solution can be provided.

The sensor module 320 is formed on the circuit board C so as to form a package in which at least one sensor member S is mounted.

The sensor member S may be a non-contact type proximity sensor such as a magnetic sensor, and may be provided so as to maintain a distance of 1 cm or less from the security recording medium 10 transported by the pickup roller 211 desirable.

That is, when the sensor member S detects presence or absence of the detecting substance incorporated in the security recording medium 10, that is, the presence of the soft magnetic material element, the oscillation of the circuit board C and the detection and output circuit (Not shown) of the image forming apparatus through signal information. Accordingly, the control unit (not shown) of the image forming apparatus can identify the authenticity of the security recording medium 10 to control the driving in the normal information output mode or the driving in the information output stop mode.

The identification unit 300 including the sensor module 320 may be installed in an image forming apparatus such as a printer or a copying machine.

Meanwhile, the sensor module 320 may be installed to be movable in a direction perpendicular to the transport direction in which the security recording medium 10a is transported. In this case, while the security recording medium 10a is taken out and fed from the cassette 120, the sensor module 320 can be moved in synchronization with the feeding of the recording medium or a predetermined time interval in the direction perpendicular to the feeding direction . Therefore, by making it possible to identify, in the entire area, the detection material evenly dispersed in most areas of the security recording medium 10a, the recognition accuracy of the security recording medium can be improved.

To this end, the sensor module 320 may be installed on the drive shaft 111a of the pickup roller 111 so as to be movable along the drive shaft 111a. The sensor module 320 may be configured to be automatically transported in conjunction with the driving of the pickup roller 111 or may be driven by a separate driving unit.

As another embodiment for this purpose, two or more identification units may be provided so as to be spaced apart in a direction perpendicular to the conveying direction in which the security recording medium is conveyed. In this case, the detection accuracy of the security recording medium can be improved by making it possible to identify the detection substance evenly dispersed in the most area of the security recording medium 10a in the entire area.

A detailed description of the operation of the recording medium identification unit 300 for security of the image forming apparatus according to the present invention will be given later with reference to FIG.

FIG. 5 is a schematic structural view showing a state in which a security recording medium identification unit according to another embodiment of the present invention is installed on a sheet conveyance path of an image forming apparatus, FIG. 6 is a schematic view FIG. 2 is a schematic perspective view showing a recording medium identification unit for security of an image forming apparatus. FIG.

5 and 6, a security recording medium identification unit 400 according to another embodiment of the present invention is provided on a downstream side of a pickup roller (not shown) so as to be provided on a paper conveyance path of the image forming apparatus A sensor panel 410 mounted on the housing frame 110 and a sensor module 411 installed on the sensor panel 410.

A plurality of conveying rollers 115 and 115a are installed on the housing frame 110 so as to correspond to the upper and lower sides of the paper conveying path and the security recording medium 10 is driven by the driving force of the conveying rollers 115 and 115a, .

The sensor panel 410 may be installed on the housing frame 110 so as to be positioned at the upper portion or the lower portion of the sheet conveying path so as to face either the upper surface or the back surface of the recording medium 10, have.

The sensor module 411 is formed on the circuit board C so as to form a package in which at least one sensor member S is mounted. Here, the reference numeral 411a denotes a signal line connected to a control unit (not shown) of the image forming apparatus.

The sensor member S may be a non-contact proximity sensor such as a magnetic sensor, for example, and is preferably provided so as to maintain a distance of less than 1 cm from the security recording medium 10 transported on the sheet conveying path .

That is, when the sensor member S detects presence or absence of the detecting substance incorporated in the security recording medium 10, that is, the presence of the soft magnetic material element, the oscillation of the circuit board C and the detection and output circuit (Not shown) of the image forming apparatus through signal information. Accordingly, the control unit (not shown) of the image forming apparatus can identify the authenticity of the security recording medium 10 to control the driving in the normal information output mode or the driving in the information output stop mode.

A detailed description of the operation of the recording medium identification unit 400 for security of the image forming apparatus according to the present invention will be given later with reference to FIG.

FIG. 7 illustrates an operation flow chart for illustrating a security recording medium identification method by a security recording medium identification unit according to the present invention.

7, the rotation of the paper pick-up roller 111 is started by the operation of the image forming apparatus (not shown) (S-10), and the unit recording medium, that is, When 20% of the time has elapsed, the control unit of the image forming apparatus checks whether or not the signal information in which the detection substance is detected from the sensor member S is received (step S-20). At this time, if the detected signal information is not transmitted, the control unit of the image forming apparatus stops the normal output mode operation.

On the other hand, if the signal information on which the detecting substance is detected is sent from the circuit board C of the sensor member S to the control unit of the image forming apparatus, the operation continues to the normal output mode of the image forming apparatus.

Next, when 40%, 60%, and 80% of the time of completion of the entire transfer of one sheet of paper is elapsed, the control unit of the image forming apparatus determines whether or not the signal information in which the detection substance is detected from the sensor member S is received It is repeatedly checked (steps S-30 to S-50). At this time, if the signal information in which the detection material is detected is not transmitted in steps S-30 to S-50, the controller of the image forming apparatus stops the normal output mode operation.

On the other hand, if signal information in which a detection substance is detected is sent from the circuit board C of the sensor member S to the control unit of the image forming apparatus in steps S-30 to S-60, Continue operation control.

As a next step, when the time for completion of the complete transfer of one sheet of paper has elapsed, the control unit of the image forming apparatus repeats step S-50 in step S-10 according to the output continuation based on the amount of output information inputted in the initial operating state (Step S-60).

On the other hand, in the security recording medium identification method of the security recording medium identification unit according to the present invention described with reference to FIG. 7, when the sensor member S is detected at a time interval of 20% It is an embodiment of the present invention to check whether or not the signal information on the detection substance detection result is received, and the present invention is not limited thereto.

On the other hand, in order to identify the security recording medium 10a in which many micro-sized micro wirings 11 as the detecting material are uniformly dispersed and mixed in the substrate 10, the security recording medium is moved in the conveying direction The security recording medium can be identified by the security recording medium when the security recording medium is recognized in three or more areas. For example, the security recording medium can be divided into a front portion, a middle portion, and a rear portion based on the transport direction, and the security detection material can be recognized at least once in each region.

In this case, since the detection material is evenly dispersed in the security recording medium 10a, it is possible to uniformly identify the entire area of the security recording medium, thereby making it possible to print on the area where there is no security detection material, Thereby preventing the security from being avoided by taking out the security paper, thereby improving the security performance.

On the other hand, the reference of the time interval for checking whether or not the signal information on the detection result of the substance for detection of the sensor member S is received may be adjusted and applied in various patterns.

Hereinafter, the present invention will be described in more detail with reference to the following examples. The following examples are provided to illustrate the present invention, but the scope of the present invention is not limited thereto.

[Example]

Examples 1 to 6. Preparation of security paper

Micro wirings containing amorphous alloys consisting of Fe, Co, Ni, B and Si main metal materials were mixed with the slurry pulp to prepare a security paper under the conditions shown in Table 1 below.

Comparative Examples 1 to 8. Manufacture of security paper

A security sheet was prepared in the same manner as in Example 1, except that microwires were produced so that the properties as shown in Table 1 below in Example 1 were obtained.

Wire diameter
(탆) Wire length
(mm) Condition (1)
(%) Condition (2) Condition (3)
Example 1 10 2 0 200 1.1 Example 2 12 3 0 250 1.2 Example 3 17 5 0 294. 1.4 Example 4 20 9.5 0 475 1.8 Example 5 11 9.5 0 864 2 Example 6 7 8 0 1143 1.7 Comparative Example 1 18 9 35 500 1.5 Comparative Example 2 11 4 70 364 0.7 Comparative Example 3 0.5 0.4 0 800 One Comparative Example 4 28 15 0 536 2.2 Comparative Example 5 24 2.5 0 104 0.9 Comparative Example 6 10 2.5 0 250 0.21 Comparative Example 7 10 2.5 0 250 3.6 Condition
(1) to (3) (1) The ratio of the wire with the distance between the nearest wire of 30 mm or more
(2) 170 <wire length / wire cross-section diameter <1700
(3) 0.3 < Wm / Wc < 3
Here, the number of wires having an angle of 45 degrees or more when a straight line parallel to the longitudinal axis of the security sheet meets the micro-wire is referred to as Wc, and the number of wires having an angle of less than 45 degrees is referred to as Wm.

[Experimental Example]

The evaluation of the above Examples 1 to 6 and Comparative Examples 1 to 7 was carried out in various items as described below, and the results are shown in Table 2.

1) Secure Paper Identification Rate: When the security recording medium identification unit of the present invention is mounted on the drive shaft portion of the paper feed roller of the Samsung black and white laser printer SL-M2620ND and printing is executed, the identification unit is recognized as security paper A percentage (total of 1,000 printed)

2) Security gate recognition sensitivity: Sensitivity is measured by measuring the sensitivity when the paper is passed through an EM gate (EM-100D System, product name: EMILY ELECTRONICS) of an electromagnetic (electromagnetic) (5-1).

Percentage of Secure Paper Identification (%) Security gate recognition sensitivity (5 ~ 1) Example 1 99.9 4 Example 2 100 5 Example 3 100 5 Example 4 100 4 Example 5 100 4 Example 6 100 5 Comparative Example 1 22 5 Comparative Example 2 17 4 Comparative Example 3 0 3 Comparative Example 4 93 2 Comparative Example 5 100 One Comparative Example 6 100 2 to 5 Comparative Example 7 100 2 to 5

As shown in Table 2, the security sheets of Examples 1 to 6 manufactured according to the embodiment of the present invention are well-distinguished in the security recording medium identification unit, As shown in FIG. However, in the case of Comparative Examples 1 and 2, the sensitivity at the EM gate is not bad, but the recognition rate in the identification unit is remarkably low because the condition (1) is not satisfied. In the case of the comparative example 3, the size of the wire was too small to be recognized by the identification unit, and in the case of the comparative example 4, since the wire size was too large as 15 mm, the retention rate of the same amount of micro- This is the case where the detection rate drops because the number of wires on the security paper is reduced. In order to compensate for this, more micro-wires must be introduced at the time of the security paper pile, which is a cause of cost increase. In the comparative example 5, the condition (2) is not satisfied, so that it can be seen that the detection is little. In the case of the comparative examples 6 to 7, the recognition rate is not related to the directionality of the wire, but the detection power at the security gate shows a significant deviation. In the comparative example 6, it was found that the detection was difficult when the paper was moved in the longitudinal direction and the gate was passed, and in the comparative example 7, the detection was difficult in the transverse direction.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that various modifications may be made, and such modifications are intended to fall within the scope of the appended claims.

10: Detection substrate layer 11: Detecting substance
12: shielding layer 13: undercoat layer
110: image forming apparatus housing frame 111: pickup roller
130: flange member 131: engaging hole
200, 300, 400: security recording medium identification unit 210: bracket member
220: support panel 230: friction pad
240: Sensor module 310: Sensor housing
311: Socket section 320: Sensor module
410: sensor panel 411: sensor module

Claims (8)

A recording unit for recording the security recording medium, a pick-up roller for picking up the security recording medium, a printing unit for printing information on the security recording medium, and a transport path for transporting the security recording medium from the storage unit A recording medium identification unit for security in an image forming apparatus that recognizes the detection material in an image forming apparatus that prints information on a security recording medium in which a plurality of micro-wires are dispersed and incorporated in a substrate as a detection substance,
Wherein the micro-wires are configured such that 1) the distance between the micro-wires located closest to each other is less than 30 mm, 2) the length of the micro-wires is greater than 0.5 mm and less than 10 mm, 3) And a sensor module for detecting presence or absence of the microwire embedded in the security recording medium, wherein a value obtained by dividing the value by the cross-sectional diameter of the wire is greater than 170 and smaller than 1700,
Wherein the sensor module is provided in at least one of a drive shaft of the pickup roller, a region adjacent to the pickup roller, and the conveyance path,
The method according to claim 1,
Wherein the diameter of the microwire is 0.5 to 40 μm.
The method according to claim 1,
1) the distance between the micro-wires located closest to the security recording medium is less than 30 mm; 2) the length of the micro-wires is greater than 0.5 mm and less than 10 mm; 3) Wherein a value obtained by dividing the micro-wire by the cross-sectional diameter of the micro-wire is greater than 170 and less than 1700 is contained by 80% or more.
The method according to claim 1,
Wherein a value obtained by dividing the number of micro wirings having an angle (acute angle) of less than 45 degrees with the straight line parallel to the longitudinal axis of the security recording medium by the number of the micro wirings having 45 degrees or more is larger than 0.3 and smaller than 3 Recording medium identification unit.
The method according to claim 1,
Wherein the sensor module is installed so as to be movable in a direction perpendicular to a conveying direction in which the security recording medium is conveyed.
The method according to claim 1,
Wherein at least two of the sensor modules are installed so as to be spaced apart in a direction perpendicular to a conveying direction in which the security recording medium is conveyed.
The method according to claim 1,
Characterized in that the security recording medium is divided into three or more areas in the conveying direction in which the security recording medium is conveyed, and when the security recording medium is recognized in three or more areas, it is identified as the security recording medium Recording medium identification unit.
The method according to claim 1,
Wherein the sensor module includes a non-contact proximity sensor.

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