JP2005146477A - Security paper, method and apparatus for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide security paper that is formed by dispersing and sprinkling magnetic wires uniformly on the wet paper that is dehydrated on the paper-making screen through a simple process so that the formed magnetic wire layer may not easily be stripped and provide the production method and apparatus therefor. <P>SOLUTION: The first paper layer-forming tank and the second paper layer-forming tank where these tanks are individually filled with a raw material for paper making are arranged above the paper-making screen of the paper-making machine. The magnetic wire-feeding tank for storing a water suspension prepared by mixing magnetic wires and water is arranged between the first paper layer-forming tank and the second paper layer-forming tank and air bubbles are generated in the water suspension stored in the magnetic wire-feeding tank and the water suspension is allowed to overflow from the magnetic wire-feeding tank to feed the water dispersion on the first paper layer formed by the paper-making stock fed from the first paper layer-forming tank whereby the magnetic wires including the water dispersion are dispersed on the first paper layer. Then, the paper-making stock is fed from the second paper layer-forming tank onto the first paper layer to form the second paper layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a security paper in which a magnetic wire is encased and a method and apparatus for manufacturing the same, and in particular, the magnetic wire is uniformly dispersed and sprinkled on a dehydrated wet paper on a papermaking net by a simple process. The present invention relates to a security paper in which magnetic wires formed by uniformly dispersing on the entire surface of the paper do not easily peel off, and a method and apparatus for manufacturing the same.

  In recent years, with the spread of computers, multifunction peripherals, and networks, information can be easily acquired via the network, and the acquired information can be easily printed and copied.

  The information includes information that only a specific person can know, information that requires confidentiality, etc., to prevent the confidential information from being leaked due to unauthorized printing or copying of such confidential information. It is desired to provide various apparatuses and methods with enhanced information security.

  In addition, problems such as illegally forging securities and certificates using color copiers, etc. have occurred due to improvements in printing technology and copying technology, and it is possible to prevent forgery and leakage of confidential information. As one of the security measures, various security papers, manufacturing methods and apparatuses thereof are provided.

  With regard to anti-counterfeit paper for the purpose of preventing forgery by illegal copying and its manufacturing method, for example, as disclosed in Patent Document 1, it is used that a copier cannot reproduce a color having a brilliant color such as a metal color or an interference color. Thus, a special paper manufacturing method has been proposed in which strips having glitter are unevenly distributed on the surface of the base paper.

  According to this proposal, when copying a forgery-preventing paper in which strips having glitter on the surface of the base paper are unevenly distributed using a color copying machine, the portions of the strips having glitter on the surface of the base paper are not present. It has been shown that it can be reproduced in black without being reproduced and can be prevented from forgery, and a general problem and a solution when a variety of strips are inserted into paper are disclosed.

  For example, when a metal piece is spread on the surface of the paper, in the manufacturing method in which the metal piece is sprinkled from the air onto the dehydrated wet paper on the paper machine net of the paper machine, the metal piece is scattered and the work efficiency is low. Worker safety and health issues have been pointed out.

  Therefore, as a method for solving this problem, in Patent Document 1, a strip sprinkler for sprinkling strips on dewatered wet paper on a paper web is installed on the paper web of a paper machine, and the strip sprinkler is placed in the strip sprinkler. A method is shown in which a suspension of the stored strips is overflowed by the rotation of a stirring blade and the strips are uniformly sprinkled on the wet paper.

Regarding the adhesion between the strip and the paper, as shown in, for example, Patent Document 2, in a forgery-preventing paper referred to as a so-called threaded paper, a thread-like material is a paper layer. There has been proposed a thread for forgery prevention paper and a forgery prevention paper that can solve the problem that the effect of preventing forgery is reduced.
JP 07-145600 A Japanese Patent Laid-Open No. 10-292296

  By the way, using the method for producing special paper disclosed in the above-mentioned proposed Patent Document 1, for example, a magnetic wire having a metal core formed in a wire shape is cut into 5 to 50 mm, and a large number of magnetic wires are prepared. When the aqueous suspension made in the container is stored in the strip sprinkler and the suspension of the magnetic wire is overflowed by the rotation of the stirring blade, the magnetic wire is wound around the rotating shaft of the stirring blade. As a result, problems such as catching on the blades occurred, and the magnetic wire supplied to the strip sprinkler could not be sprinkled efficiently on the dehydrated wet paper on the papermaking net.

  Further, in the above-mentioned proposed Patent Document 2, as a solution to the problem that the filaments peel from the paper layer, there is a proposal of an anti-counterfeit paper configured to improve the adhesive force between the thread and the paper layer using an adhesive. However, this proposal requires a process of newly adding an adhesive application process to the thread base material, which complicates the manufacturing process.

  In view of this, the present invention makes it easy to uniformly disperse and sprinkle the magnetic wire on the dewatered wet paper on the paper net by a simple process, and to easily form the magnetic wire formed by uniformly dispersing on the entire surface of the paper. It is an object of the present invention to provide a security paper that does not peel and a method and apparatus for manufacturing the security paper.

  In order to achieve the above object, according to the first aspect of the present invention, a first paper layer forming tank and a second paper layer forming tank in which paper raw materials are respectively stored are arranged on a papermaking net of a paper machine. And a magnetic wire supply tank for storing a water suspension obtained by mixing a magnetic wire and water between the first paper layer forming tank and the second paper layer forming tank on the papermaking net. And bubbles are generated in the water suspension stored in the magnetic wire supply tank, and the water suspension is discharged from the magnetic wire supply tank by the bubbles from the first paper layer forming tank. The magnetic wire contained in the aqueous suspension is dispersed and arranged on the first paper layer by feeding it over the first paper layer formed of the paper raw material, and the magnetic wire is dispersed. By supplying paper raw material from the second paper layer forming tank onto the first paper layer disposed, Characterized in that it is a security paper manufacturing method of forming a paper layer.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the surface of the magnetic wire is coated with a hydrophilic material.

  The invention of claim 3 is characterized in that, in the invention of claim 1, the surface of the magnetic wire is subjected to a hydrophilic treatment.

  According to a fourth aspect of the present invention, in any one of the second or third aspects, the magnetic wire has a characteristic of a large Barkhausen effect.

  According to a fifth aspect of the present invention, in the first aspect of the present invention, a magnet that is movable in a predetermined direction is installed on the bottom surface of the magnetic wire supply tank, and the water suspension is moved by moving the magnet in a predetermined direction. The magnetic wire in the liquid is moved to the region where the bubbles are generated.

  According to a sixth aspect of the present invention, in the third aspect of the invention, the magnetic wire supplied in the magnetic wire storage tank by supplying the magnetic wire into the water supplied in advance to the magnetic wire storage tank. The wire is hydrophilically treated by reacting with water.

  According to a seventh aspect of the present invention, there is provided a first paper layer, a plurality of magnetic wire layers distributed on the first paper layer, and a second paper formed on the magnetic wire layer. And a security paper comprising a layer.

  The invention of claim 8 is characterized in that, in the invention of claim 7, the surface of the magnetic wire of the magnetic wire layer is coated with a hydrophilic material.

  The invention of claim 9 is characterized in that, in the invention of claim 7, the surface of the magnetic wire of the magnetic wire layer is subjected to a hydrophilic treatment.

  According to a tenth aspect of the present invention, in any one of the eighth or ninth aspects, the magnetic wire of the magnetic wire layer has a characteristic of a large Barkhausen effect.

  The invention according to claim 11 is the invention according to claim 7, wherein the magnetic wire of the magnetic wire layer has a length corresponding to the information to be added.

  The invention of claim 12 is characterized in that, in the invention of claim 7, the magnetic wires of the magnetic wire layer have different lengths corresponding to the information to be added.

  According to a thirteenth aspect of the present invention, a first paper layer forming tank and a second paper layer forming tank in which paper raw materials are respectively stored are disposed on a papermaking net of a paper machine, and the papermaking machine A security in which a magnetic wire supply tank is disposed between the first paper layer forming tank and the second paper layer forming tank on the net to store an aqueous suspension obtained by mixing magnetic wires and water. In the paper manufacturing apparatus, the magnetic wire supply tank includes a bubble generating means for generating bubbles in a water suspension stored in the magnetic wire supply tank, and a water suspension by the bubbles generated by the bubble generating means. Supply means for supplying liquid onto the first paper layer formed from the paper raw material from the first paper layer forming tank by overflowing the liquid from the magnetic wire supply tank, The magnetic wires contained are dispersed on the first paper layer, and the magnetic wires It is a security paper manufacturing apparatus that forms a second paper layer by supplying a paper raw material from the second paper layer forming tank onto the first paper layer in which ears are dispersedly arranged. .

  The invention of claim 14 is the invention of claim 13, wherein the magnetic wire supply tank includes a magnet that is movable in a predetermined direction on a bottom surface portion, and the water suspension is moved by moving the magnet in a predetermined direction. The magnetic wire in the suspension is moved to the region where the bubbles are generated.

  According to the security paper and the manufacturing method and apparatus of the present invention, the first paper layer forming tank and the second paper layer forming tank in which the paper raw materials are respectively stored are arranged on the papermaking net of the paper machine. And a magnetic wire supply for storing an aqueous suspension in which a magnetic wire and water are mixed between the first paper layer forming tank and the second paper layer forming tank on the papermaking network. A tank is provided, bubbles are generated in the water suspension stored in the magnetic wire supply tank, and the water suspension is discharged from the magnetic wire supply tank by the bubbles from the first paper layer forming tank. The magnetic wire contained in the aqueous suspension is dispersed and arranged on the first paper layer by supplying it to the first paper layer formed of the paper raw material, and the magnetic wire Paper raw material from the second paper layer forming tank on the first paper layer dispersedly arranged Since the second paper layer is formed by feeding, the magnetic wire is uniformly dispersed over the entire surface of the paper that has been made, and the magnetic wire and the paper pulp fiber are strongly intermolecular. It is possible to manufacture a security paper that is bonded and does not easily peel the magnetic wire from the paper.

  Moreover, since it is not necessary to provide an adhesive coating step on the magnetic wire in order to bond the magnetic wire and the paper pulp fiber, the manufacturing process is simple.

  Furthermore, the magnetic wire supplied to the magnetic wire sprinkling device can be efficiently sprinkled on the dehydrated wet paper on the papermaking net without problems such as the magnetic wire winding around the rotating shaft of the stirring blade or being caught on the blade. It has the effect of being able to do it.

  The security paper and the manufacturing method and apparatus according to the present invention are intended to prevent the leakage of information, confidentiality, security paper for printing or copying confidential information for the purpose of document management, or forgery prevention of securities or certificates. In addition to providing the security paper described above, it is used as a manufacturing apparatus to which the method for manufacturing the security paper is applied.

  The security paper according to the present invention is a security paper in which the magnetic wire formed uniformly dispersed on the entire surface of the paper does not easily peel off, and the magnetic wire formed on the security paper has a soft magnetic property having a large Barkhausen effect. It is a body. By applying a predetermined alternating magnetic field to the security paper according to the present invention in which the magnetic wire having a large Barkhausen effect is uniformly dispersed over the entire surface of the paper, the magnetic wire formed on the security paper is reversed in magnetization. Sometimes a steep pulse signal is emitted, and the pulse signal corresponding to the size of the magnetic wire formed on the security paper is detected by detecting this pulse signal with a detection device, and identification information unique to the security paper is detected. Is possible.

  For example, the above-described detection device is disposed in a copying machine, a printing device, etc., and information printed on the security paper according to the present invention is formed on the security paper when the information is copied by, for example, a copying machine in which the detection device is disposed. Unauthorized copying can be prevented by determining whether or not copying is permitted based on identification information unique to the security paper corresponding to the pulse signal of the magnetic wire.

  In addition, when the detection device described above is installed in the vicinity of an entrance / exit of a confidential information management room or the like and a security paper on which confidential information is printed is attempted to be taken out illegally, the detection device installed in the vicinity of the entrance / exit is a security paper. It is possible to prevent the confidential information from being taken out illegally by detecting the magnetic wire and issuing an alarm or by controlling the door of the doorway to be closed.

  As described above, since the security paper according to the present invention can be detected by the above-described detection device, the information printed on the security paper is illegally copied or illegally printed, and the confidential information printed on the security paper is illegally taken out. Etc. can be prevented.

  In this embodiment, a number of magnetic wires cut to a predetermined length are uniformly dispersed over the entire surface of the paper, and a security paper in which the magnetic wires are not easily peeled off from the paper can be manufactured in a simple process. A security paper, a manufacturing method and an apparatus thereof will be described.

  FIG. 1 is a conceptual diagram of a security paper manufacturing apparatus to which a method for manufacturing security paper according to the present invention is applied.

  As shown in FIG. 1, a security paper manufacturing apparatus 100 (hereinafter referred to as “paper machine 100”) includes a pulley in which a papermaking net 3 wound in an endless manner is fitted to a drive shaft of a drive motor (not shown). The first paper layer forming head box 4 is arranged so as to be movable at a predetermined speed in a predetermined direction (arrow 12 in the figure) through the pulley 2 and the pulley 1 and supplies a papermaking raw material to a predetermined position on the papermaking net 3. A magnetic wire sprinkling device 5 and a second paper layer forming head box 6 are disposed.

The magnetic wire sprinkling device 5 is disposed to be separated from the first paper layer forming head box 4 by a predetermined length in the moving direction of the paper making net 3 (arrow 12 in the figure), and the second paper layer forming head. The box 6 is disposed away from the magnetic wire sprinkling device 5 by a predetermined length in the moving direction of the papermaking net 3.
The first paper layer forming head box 4 stores a first paper raw material 9, the magnetic wire sprinkling device 5 has a magnetic wire water suspension 10, and the second paper layer forming head box 6 has a The second papermaking raw material 11 is stored.

  The first papermaking raw material 9 is supplied onto the papermaking net 3 from the discharge port 4 a of the first paper layer forming head box, and the supplied first papermaking raw material 9 is moved by the magnetic wire sprinkling device 5 along with the movement of the papermaking net 3. The apron 52 is carried directly below the tip 52a.

  From the magnetic wire sprinkling device 5, the aqueous suspension 10 of the magnetic wire overflowed from the magnetic wire sprinkling device 5 flows downward along the sloping apron 52, and the papermaking network 3 is formed at the tip 52 a of the apron 52. A magnetic wire aqueous suspension 10 is supplied onto the first papermaking material 9 supplied above.

  The first papermaking raw material 9 and the magnetic wire aqueous suspension 10 formed in two layers on the papermaking net 3 are further carried directly under the second paper layer forming head box 6 as the papermaking net 3 moves. The second papermaking raw material 11 is supplied onto the magnetic wire aqueous suspension 10 from the discharge port 6a of the paper layer forming head box 6, and the first papermaking raw material 9, the magnetic wire aqueous suspension 10 and the second papermaking raw material are supplied. 11 is formed into a three-layer structure, moves with the papermaking net 3, and is discharged from the papermaking machine 100.

A table roll 7 and a suction box 8 are disposed on the lower surface of the papermaking net 3, and the table roll 7 supports the papermaking net 3 and includes the first papermaking raw material 9 and magnetic wires supplied onto the papermaking net 3. Water is naturally dehydrated from the water suspension 10 and the papermaking raw material of the second papermaking raw material 11, and the suction box 8 is configured such that the papermaking raw material is formed into a sheet by forcibly dehydrating the papermaking raw material. .
2 is a diagram showing the structure of the security paper discharged by the paper machine 100 shown in FIG. 1. FIG. 2 (a) is a schematic sectional view of the security paper 200, and FIG. 2 (c) is the security paper. FIG.

  As shown in FIG. 2 (a), the security paper 200 discharged by the paper machine 100 is formed in a three-layer structure, and the first paper layer 201 in which the lowermost layer is formed of the first papermaking raw material 9, the middle The layer is composed of a magnetic wire mixed layer 202 formed from the aqueous suspension 10 of the magnetic wire 204, and the uppermost layer is composed of the second paper layer 203 formed from the second papermaking raw material 11.

  In FIG. 2 (a), the magnetic wire mixed layer 202 is depicted as a single layer, but is a layer having a structure in which the magnetic wire 204 and paper pulp fiber are joined by an intermolecular force mediated by a hydroxyl group. It is formed with.

  As shown in FIG. 2B, the security paper 200 discharged by the paper machine 100 is formed in a state where the magnetic wires 204 are uniformly dispersed on the entire paper surface.

  Here, the configuration of the magnetic wire 204 formed uniformly distributed over the entire surface of the security paper 200 shown in FIG. 2 will be briefly described.

  The magnetic wire 204 is characterized in that, for example, a metal core made of an amorphous soft magnetic material having a diameter of 1 to 30 microns is coated with a hydrophilic material, or the surface of the material covering the metal core is subjected to a hydrophilic treatment. ing.

  The thickness of the hydrophilic material is, for example, 1 to 20 microns, and the thickness for hydrophilic treatment is several microns or less.

  The hydrophilic material is a state in which the surface is covered with a hydroxyl group (—OH) and water is easily adapted to the surface.

  For example, when the surface of the metal core is coated with titanium oxide (TiO 2) having photocatalytic performance and exposed to light, the surface is covered with a hydroxyl group by photocatalytic action, and hydrophilicity is expressed.

  Further, when moisture diffuses in a part of the hydrophilic material layer or hydrophilic treatment layer covering the surface of the metal core, the hydrophilicity is maintained for several days even without light.

  When the magnetic wire 204 has hydrophilicity, hydrogen bonds are formed between the magnetic wire 204 and the cellulose molecules of the paper pulp, and the paper pulp and the magnetic wire 204 are attracted by intermolecular forces and are difficult to peel off.

  In such a method, the principle that cellulose molecules have self-adhesiveness by hydrogen bonding is applied to the adhesion between cellulose and magnetic wire 204 at the papermaking stage.

  When the magnetic wire 204 is covered with a hydrophilic material, the metal core may be formed of a multilayer structure in which the metal core is covered with a glass material (such as SiO 2 or Pyrex (registered trademark) glass) and further covered with a hydrophilic material. .

  As the hydrophilic material, an organic material generally called a hydrophilic polymer can be used.

  However, in the case of a single layer structure in which the metal core is coated with a single hydrophilic material, the metal forming the metal core may corrode and deteriorate the magnetic properties due to moisture permeability. It is desired to devise such a method that a metal core covered with a corrosion prevention layer is coated with a hydrophilic material of a hydrophilic polymer on the metal core covered with the corrosion prevention layer.

  The magnetic material forming the metal core of the magnetic wire 204 includes at least one of Fe and Co, and Fe and Co are typically alloys having at least two components of Si, B, Cr and Mo as other components. It is known as a known technique to be used as a new component.

  The magnetic wire 204 according to the present invention is not limited to the components of these known techniques, and any soft magnetic material that has a large Barkhausen effect when the metal core is formed into a wire shape may be used. .

  The large Barkhausen effect is, for example, a pulse applied to a detection coil when a domain wall propagates through a magnetic wire, as described in “Magnetic sensor science and technology” (Toshio Mohri, Corona) page 69. This refers to a physical effect such that a voltage is detected.

  The hydrophilic treatment described above refers to a treatment for forming a hydroxyl group on the surface or a surface treatment so that a hydroxyl group is easily formed.

For example, when the surface of the metal core is coated with titanium oxide, the metal core coated with titanium oxide is irradiated with light to forcibly form a hydroxyl group on the surface of the metal core, or alternating current A process may be performed in which surface positive ions and hydroxyl ions are hydrogen-bonded to make the surface hydrophilic by lightly injecting plasma ions generated by discharge.
FIG. 3 is an explanatory diagram for explaining a method of detecting the magnetic wire 204 having the characteristic of the large Barkhausen effect formed on the security paper 200.

  Referring to FIG. 3, the security paper 200 according to the present invention is more effective as a security paper for the purpose of preventing information leakage, maintaining confidentiality, document management, or for preventing the forgery of securities and certificates. A brief explanation will be given.

  FIG. 3A is a diagram illustrating an example of a security paper 300 on which magnetic wires L, 2L, 3L, and 4L having a plurality of large Barkhausen effect characteristics having different lengths are formed, and FIG. FIG. 4 is a diagram showing an intrinsic pulse signal generated when the magnetic wires L, 2L, 3L, and 4L shown in FIG.

  The numerical values 2, 3, and 4 of the magnetic wires L, 2L, 3L, and 4L are attached to identify a plurality of magnetic wires having different lengths, and the magnetic wires L, 2L, 3L, and 4L are identified. Are L (1) <L (2) <L (3) <L (4) in the order of L (1), L (2) L (3) L (4). .

  When the security paper 300 on which the magnetic wires L311, 2312, 3L313, 4L314 are formed is placed in a predetermined alternating magnetic field, an alternating magnetic field having a magnetic field strength exceeding the intrinsic coercive force of each magnetic wire L312, L312, 3L313, 4L314 is generated. In response to the magnetization reversal, a steep pulse signal is generated.

  The coercive force unique to each magnetic wire possessed by each of the magnetic wires L311, L312, 3L313, 4L314 can be set to a different value by changing the attributes of the magnetic wire, such as length, magnetic core diameter, material, and the like.

  For example, if the coercivity of the magnetic wire L311 is H1, the coercivity of the magnetic wire 2L312 is H2, the coercivity of the magnetic wire 3L313 is H3, and the coercivity of the magnetic wire 4L314 is H4, each of these magnetic wires is shown in FIG. The magnetic field is reversed by receiving an alternating magnetic field 301 having a predetermined frequency as shown in FIG. 2 and pulse signals A, B, C, and D are generated.

  For example, at times t1, t2, t3, and t4 when the magnetic field strength of the alternating magnetic field 301 exceeds H1, H2, H3, and H4, the magnetic wires L311, L312, 3L313, and 4L314 undergo magnetization reversal, and pulses are generated at that time. Signals A, B, C, D are emitted.

  The pulse signal A is a pulse signal emitted when the magnetic wire L311 is magnetized, the pulse signal B is a pulse signal emitted when the magnetic wire 2L312 is magnetized, and the pulse signal C is a pulse signal and pulse signal emitted when the magnetic wire 3L313 is magnetized. D indicates pulse signals generated when the magnetic wire 4L314 is magnetized.

  In this way, by applying an alternating magnetic field of a predetermined frequency to a magnetic wire having a large Barkhausen effect characteristic, the magnetic wire emits a steep pulse signal at the time of magnetization reversal, and by detecting this pulse signal, security paper The magnetic tag formed on 300 can be detected.

  Further, since the magnetic wire having the large Barkhausen effect characteristic has a different coercive force depending on its size and the like, a plurality of magnetic wires having different coercive forces are prepared, as in the security paper 300 shown in FIG. By combining and forming a plurality of magnetic wires, the combination of magnetic wires can be specified based on the detected pulse signal pattern, and the security paper formed from the specified combination of magnetic wires can also be specified. .

  In the example of FIG. 3, for convenience of explanation, an example of the security paper 300 in which the magnetic wires L, 2L, 3L, and 4L having different lengths are formed one by one is shown. Accordingly, a plurality of magnetic wires having different lengths or a plurality of magnetic wires having the same length may be formed.

In this way, if necessary, a number of magnetic wires having different lengths or the same length are prepared, and the magnetic wires are uniformly sprinkled on the dehydrated wet paper on the paper making net, By forming it uniformly distributed over the entire surface, it is possible to give identification information unique to the security paper.
As described above, the metal core made of, for example, an amorphous soft magnetic material having a diameter of 1 to 30 microns is covered with a hydrophilic material, or the surface of the material covering the metal core is subjected to a hydrophilic treatment. A large number of prepared magnetic wires are cut into, for example, 5 mm to 50 mm, and a water suspension prepared by placing a large number of magnetic wires 204 in water is overflowed from the magnetic wire sprinkling device 5 by bubbling (bubbles). The magnetic wire 204 can be uniformly sprinkled on the stock or wet paper before forming the paper layer on the papermaking net, and the security paper that does not easily peel off the magnetic wire uniformly formed on the entire surface of the papermaking paper It can be manufactured in a process.

  FIG. 4 is a diagram showing details of the magnetic wire sprinkling device 5 which is a feature of the paper machine 100 according to the present invention.

  The configuration and operation of the magnetic wire sprinkling device 5 will be described with reference to FIG.

  As shown in FIG. 4, the magnetic wire sprinkling device 5 includes a storage tank 51 and an apron 52 arranged at predetermined positions above the papermaking net 3. The storage tank 51 includes a bubble generation tank 53 and a water suspension. The liquid supply tank 54 is partitioned by a partition plate 55.

  In addition, the partition plate 55 is a storage tank so that the aqueous suspension 10 of the magnetic wire 204 supplied to the storage tank 51 can freely flow at the bottom surfaces of the bubble generation tank 53 and the water suspension supply tank 54. 51 is configured to partition a predetermined length from the upper surface to the lower surface, and by dividing the storage tank 51 into a bubble generation tank 53 and a water suspension supply tank 54 by a partition plate 55, the bubble generation tank 53 The generated bubbles are prevented from diffusing into the water suspension supply tank 54, and the magnetic wire 204 in the water suspension 10 of the bubble generation tank 53 is prevented from diffusing into the water suspension supply tank 54. It becomes possible.

  Further, when the magnetic wire 204 in the water suspension 10 of the bubble generation tank 53 diffuses into the water suspension supply tank 54, the efficiency of the supply amount of the magnetic wire 204 formed on the papermaking through the bubble generation tank 53 and the apron 52 is increased. Decreases.

  Further, in order to prevent the above-described bubble diffusion and magnetic wire 204 diffusion, the bottom surface of the storage tank 51 is inclined, and the magnetic wire diffused in the water suspension supply tank 54 is collected in the bubble generation tank 53, An ultrasonic vibration plate may be installed on the bottom surface of the storage tank 51 and the magnetic wires may be collected in the bubble generation tank 53 by tilting and vibrating the bottom surface.

  The water suspension supply tank 54 is provided with a supply pipe 56 for supplying the aqueous suspension 10 of the magnetic wire 204 from the outside and a compressed gas inlet pipe 57 for generating bubbles in the bubble generation tank 53. The aqueous suspension 10 of the magnetic wire 204 supplied from the supply pipe 56 is stored in the aqueous suspension supply tank 54 and the bubble generation tank 53.

  The distal end portion of the compressed gas inlet tube 57 is a closed tube, and a plurality of minute holes are provided in a part thereof and arranged on the bottom surface portion of the bubble generating tank 53, and compressed air or compressed nitrogen supplied from the outside, etc. Gas is released from a large number of minute holes to generate bubbles in the aqueous suspension 10 of the magnetic wire 204 stored in the bubble generation tank 53.

  By generating bubbles in the aqueous suspension 10 of the magnetic wire 204 stored in the bubble generation tank 53, the speed at which the aqueous suspension 10 of the magnetic wire 204 overflows from the bubble generation tank 53 is controlled, The effect of stirring so that the magnetic wire 204 in the suspension 10 is uniformly dispersed in the aqueous suspension 10 can be obtained.

  In addition, the structure which provided many holes in the front-end | tip part of the compressed gas inflow pipe | tube 57 in part or all of a planar panel may be sufficient.

  A discharge port 5 a is provided at a predetermined position of the bubble generation tank 53 so as to be connected to the upper part of the apron 52 formed in a slope shape, and the aqueous suspension 10 of the magnetic wire 204 stored in the bubble generation tank 53. When air bubbles are generated, the aqueous suspension 10 of the magnetic wire 204 overflows from the discharge port 5a and flows along the apron 52 to the lower part of the apron 52.

  The aqueous suspension 10 of the magnetic wire 204 that has flowed to the lower part of the apron 52 supplies the aqueous suspension 10 of the magnetic wire 204 onto the first papermaking raw material 9 supplied onto the papermaking net 3 at the tip 52a of the apron 52. Then, the magnetic wire mixed layer 202 as shown in FIG. 2 is formed.

  The operation of the magnetic wire sprinkling device 5 configured as described above will be briefly described as follows.

  When the paper machine provided with the magnetic wire sprinkling device 5 is operated, the first papermaking raw material 9 is supplied onto the papermaking net 3 from the discharge port 4a of the headbox for forming the first paper layer. The raw material 9 is dehydrated by the suction box 8 and the table roll 7 along with the movement of the papermaking net 3, and is carried directly under the tip 52 a of the apron 52 of the magnetic wire sprinkling device 5.

  The water suspension 10 of the magnetic wire 204 supplied from the supply pipe 56 is stored in the water suspension supply tank 54 and the bubble generation tank 53 of the magnetic wire sprinkling device 5, and the water suspension supply tank 554. The magnetic wire 204 in the aqueous suspension 10 stored in the tank is inclined to the bottom surface of the storage tank 51 or the water suspension supply tank by the pushing force of the aqueous suspension 10 of the magnetic wire 204 supplied from the supply pipe 56. It moves from 54 to the bubble generation tank 53.

  The magnetic wire 204 that has moved to the bubble generation area of the bubble generation tank 53 is drawn into the bubbles generated in the water suspension 10 of the bubble generation tank 53 and moves upward of the bubble generation tank 53, so that the bubble generation tank 53 is discharged onto the apron 52 together with the overflowed water suspension 10 from the discharge port 5a.

  The aqueous suspension 10 of the magnetic wire 204 discharged on the apron 52 flows to the lower part of the apron 52 along the apron 52, and is supplied to the papermaking net 3 at the lower end 52a of the apron 52. 2 is supplied with the aqueous suspension 10 of the magnetic wire 204 to form the magnetic wire mixed layer 202 as shown in FIG.

  The aqueous suspension 10 of the first papermaking raw material 9 and the magnetic wire 204 formed in two layers on the papermaking net 3 further moves the aqueous suspension 10 of the magnetic wire 204 into the suction box 8 and the table as the papermaking net 3 moves. It is dehydrated by the roll 7 and is carried directly under the head box 6 for forming the second paper layer.

  From the discharge port 6 a of the second paper layer forming head box 6, the second papermaking raw material 11 is supplied onto the aqueous suspension 10 of the magnetic wire 204 on the papermaking net 3, and the first papermaking raw material 9 and the magnetic wire 204 are supplied. The second papermaking raw material 11 is dehydrated by the suction box 8 and the table roll 7, moves with the papermaking net 3, and is discharged from the papermaking machine 100. The

  In addition, as a supply method of the water suspension 10 stored in the storage tank 51, as described above, the water suspension 10 of the magnetic wire 204 may be directly supplied from the supply pipe 56. The magnetic wire 204 is supplied to the tank 54 or the bubble generation tank 53 in advance, and only water is supplied from the supply pipe 56 to supply the water suspension 10 of the magnetic wire 204 in the water suspension supply tank 54 or the bubble generation tank 53. May be supplied.

  The storage tank 5, the compressed gas inlet pipe 57, and the apron 52 are made of a non-magnetic material and are configured to be swung from the apron 52 onto the paper layer without adhering the supplied magnetic wire 204. ing.

  FIG. 5 shows the magnetic wire shown in FIG. 4 so that the magnetic wire 204 in the aqueous suspension 10 of the magnetic wire 204 stored in the storage tank 51 can be efficiently collected in the bubble generation tank 53 without diffusing. The sprinkling device 5 is a configuration diagram showing the configuration of another magnetic wire sprinkling device.

  The configuration and operation of the magnetic wire sprinkling device 500 will be described with reference to FIG.

  As shown in FIG. 5, the magnetic wire sprinkling device 500 includes a storage tank 551 and an apron 552 that are arranged at predetermined positions above the papermaking net 3, and the storage tank 551 includes a bubble generation tank 553 and a water suspension. The liquid supply tank 554 is partitioned by a partition plate 555.

  The partition plate 555 is a storage tank so that the aqueous suspension 10 of the magnetic wire 204 supplied to the storage tank 551 can freely flow at the bottom surfaces of the bubble generation tank 553 and the water suspension supply tank 554. In the bubble generation tank 553, the storage tank 551 is partitioned into a bubble generation tank 553 and a water suspension supply tank 554 by a partition plate 555. The generated bubbles are prevented from diffusing into the water suspension supply tank 554, and the magnetic wire 204 in the water suspension 10 of the bubble generation tank 553 is prevented from diffusing into the water suspension supply tank 554. It becomes possible.

  In the vicinity of the outside of the bottom surface of the storage tank 551, a belt 21 with a permanent magnet 20 bonded to a predetermined position is installed via a pulley 31 and a pulley 30 fitted to a drive shaft of a drive motor (not shown), By periodically moving the drive motor, the magnetic wire 204 of the water suspension supply tank 554 is moved and dragged by the permanent magnet 20 along the bottom surface of the storage tank 551 from the water suspension supply tank 554 to the bubble generation tank. Move to 553.

In addition, by moving the magnet adhered on the belt 21 from the water suspension supply tank 554 toward the bubble generation tank 553, the magnet floats in the water suspension supply tank 554 near the bottom surface (within the range of magnetic force). The magnetic wire 204 can be collected and moved to the bubble generation tank 553.
The bottom surface of the storage tank 551 is formed of a non-magnetic bottom surface, and is formed of a material such as vinyl chloride or acrylic.

  The water suspension supply tank 554 is provided with a supply pipe 556 for supplying the aqueous suspension 10 of the magnetic wire 204 from the outside, and the aqueous suspension 10 of the magnetic wire 204 supplied from the supply pipe 556 is disposed. Is stored in the water suspension supply tank 554 and the bubble generation tank 553.

  Further, the bubble generation tank 553 includes a compressed gas inlet pipe 557 having a closed end for generating bubbles in the bubble generation tank 553 and having a plurality of minute holes in a part thereof, and a bottom surface of the bubble generation tank 553. Air bubbles are generated in the aqueous suspension 10 of the magnetic wire 204 stored in the bubble generation tank 553 by supplying a gas such as compressed air or compressed nitrogen from the outside.

  At a predetermined position of the bubble generation tank 553, a discharge port 505a is provided connected to the upper part of the apron 552 formed in a slope shape, and the magnetic wire 204 overflowed by the bubbles generated in the bubble generation tank 553 is suspended. The aqueous suspension 10 of the magnetic wire 204 is supplied onto the first papermaking raw material 9 to which the turbid liquid 10 is supplied onto the papermaking net 3 through the discharge port 505a and the apron 552, and the magnetic wire as shown in FIG. The mixed layer 202 is formed.

  In addition, as a method for supplying the aqueous suspension 10 stored in the storage tank 551, the aqueous suspension 10 of the magnetic wire 204 is directly supplied from the supply pipe 556 as in the case of the magnetic wire sprinkling device 5 shown in FIG. Alternatively, the magnetic wire 204 is supplied in advance to the water suspension supply tank 554 or the bubble generation tank 553, and only water is supplied from the supply pipe 556 to supply the water suspension supply tank 554 or the bubble generation tank 553. In this case, the aqueous suspension 10 of the magnetic wire 204 may be supplied.

  The storage tank 500, the compressed gas inlet pipe 557, and the apron 552 are made of a non-magnetic material, and are configured to be swung from the apron 552 onto the paper layer without adhering the supplied magnetic wire 204. ing.

  The operation of the magnetic wire sprinkling device 500 configured as described above will be briefly described as follows.

  When the paper machine provided with the magnetic wire sprinkling device 500 is operated, the first papermaking raw material 9 is supplied onto the papermaking net 3 from the discharge port 4a of the first paper layer forming head box, and the supplied first papermaking machine is provided. The raw material 9 is conveyed to the position immediately below the tip 552a of the apron 552 of the magnetic wire sprinkling device 500 as the papermaking net 3 moves.

  The aqueous suspension 10 of the magnetic wire 204 supplied from the supply pipe 556 of the magnetic wire sprinkling device 500 is stored in the aqueous suspension supply tank 554 and the bubble generation tank 553.

  The belt 21 to which the permanent magnet 20 is bonded at a predetermined position is driven by a drive motor fitted to the pulley 31 at a predetermined timing, so that the belt 21 in the water suspension 10 stored in the water suspension supply tank 554 is stored. The magnetic wire 204 moves from the water suspension supply tank 554 to the bubble generation tank 553 along the bottom surface of the storage tank 551 while being dragged along with the movement of the permanent magnet 20.

  When the magnetic wire 204 moves to the bubble generation area of the bubble generation tank 553, the magnetic wire 204 is drawn into the bubbles generated in the aqueous suspension 10 of the bubble generation tank 553, and the magnetic wire 204 is moved to the bubble generation tank 553. The water suspension 10 overflows from the discharge port 500a of the bubble generation tank 553 and is discharged onto the apron 552.

  The aqueous suspension 10 of the magnetic wire 204 discharged on the apron 552 flows along the apron 552 to the lower part of the apron 552, and is supplied to the papermaking net 3 at the lower end 552a of the apron 552. 2 is supplied with the aqueous suspension 10 of the magnetic wire 204 to form the magnetic wire mixed layer 202 as shown in FIG.

  The first papermaking raw material 9 formed in two layers on the papermaking net 3 and the aqueous suspension 10 of the magnetic wire 204 are further carried directly under the second paper layer forming head box 6 as the papermaking net 3 moves. The second papermaking raw material 11 is supplied onto the aqueous suspension 10 of the magnetic wire 204 from the discharge port 6a of the two paper layer forming head box 6, and the first papermaking raw material 9, the aqueous suspension 10 of the magnetic wire 204, and the first It is formed into a three-layer structure of two papermaking raw materials 11, moves with the papermaking net 3, and is discharged from the papermaking machine 100.

  In addition, the magnetic wire 204 may supply the magnetic wire 204 hydrophilically processed or the magnetic wire 204 coated with a hydrophilic material to the magnetic wire supply device. In order to further enhance the hydrophilic effect, the magnetic wire 204 may be used. You may perform a hydrophilic process within a supply apparatus.

  FIG. 6 shows another magnetic wire sprinkling device different from the magnetic wire sprinkling device 500 shown in FIG. 5 configured to perform hydrophilic treatment on the surface of the magnetic wire 204 in the water suspension in the bubble generating tank of the storage tank. It is a block diagram which shows the structure of an apparatus.

  The magnetic wire sprinkling apparatus 600 is the same as the magnetic wire sprinkling apparatus 500 except that a lamp 658 for performing hydrophilic treatment of the magnetic wire 204 is disposed in the bubble generation tank 553 of the magnetic wire sprinkling apparatus 500 shown in FIG. It is configured.

  The configuration and operation of the magnetic wire sprinkling device 600 will be described with reference to FIG.

  As shown in FIG. 6, the magnetic wire sprinkling device 600 is composed of a storage tank 651 and an apron 652 arranged at predetermined positions above the papermaking net 3, and the storage tank 651 includes a bubble generation tank 653 and a water suspension. The liquid supply tank 654 is partitioned by a partition plate 655.

  The partition plate 655 is a storage tank so that the aqueous suspension 10 of the magnetic wire 204 supplied to the storage tank 651 can freely flow at the bottom surfaces of the bubble generation tank 653 and the water suspension supply tank 654. In the bubble generation tank 653, the storage tank 651 is partitioned into a bubble generation tank 653 and a water suspension supply tank 654 by a partition plate 655. The generated bubbles are prevented from diffusing into the water suspension supply tank 654, and the magnetic wire 204 in the water suspension 10 of the bubble generation tank 653 is prevented from diffusing into the water suspension supply tank 654. It becomes possible.

  In the vicinity of the outside of the bottom surface of the storage tank 651, a belt 21 with a permanent magnet 20 bonded to a predetermined position is installed via a pulley 31 and a pulley 30 fitted to a drive shaft of a drive motor (not shown), By periodically moving the drive motor, the magnetic wire 204 of the water suspension supply tank 654 moves from the water suspension supply tank 654 to the bubble generation tank along the bottom surface of the storage tank 651 while being dragged along with the movement of the permanent magnet 20. Move to 653.

By moving the magnet adhered on the belt 21 in a predetermined direction (in the direction of the arrow in the figure), the magnetic wire 204 floating near the bottom surface (within the range of magnetic force) is collected and moved to the bubble generation tank 653. It becomes possible to do.
The water suspension supply tank 654 is provided with a supply pipe 656 for supplying the aqueous suspension 10 of the magnetic wire 204 from the outside, and the aqueous suspension 10 of the magnetic wire 204 is generated from the supply pipe 656. Water is supplied.

  The bubble generation tank 653 includes a compressed gas inlet pipe 657 having a closed end for generating bubbles in the bubble generation tank 653 and a plurality of minute holes provided in a part thereof. By supplying a gas such as compressed air or compressed nitrogen from the outside, bubbles are generated in the aqueous suspension 10 of the magnetic wire 204 stored in the bubble generating tank 653.

Further, the bubble generation tank 653 is provided with a lamp 658 for performing hydrophilic treatment of the magnetic wire 204 in the bubble generation tank 653. The lamp 658 has, for example, an Fe—Co exhibiting a large Barkhausen effect. -Supplying a magnetic wire 204 coated with photocatalytic titanium oxide to 4 cm of a magnetic wire 204 coated with 5 micron thick glass of a 10 micron diameter metal core made of a Si-B alloy, and supplying pipe The aqueous suspension of the magnetic wire 204 is generated by mixing with the water supplied from 656.
The length of the magnetic wire 204 is not limited to 4 cm, and may be cut to a length as required.

  A discharge port 605a is provided at a predetermined position of the bubble generating tank 653 so as to be connected to the upper part of the apron 652 formed in a slope shape, and the magnetic wire 204 overflowed by the bubbles generated in the bubble generating tank 653 is suspended. The aqueous suspension 10 of the magnetic wire 204 is supplied onto the first papermaking raw material 9 to which the turbid liquid 10 is supplied onto the papermaking net 3 through the discharge port 605a and the apron 652, and the magnetic wire as shown in FIG. The mixed layer 202 is formed.

  The storage tank 651, the compressed gas inlet pipe 657, the lamp 658, and the apron 652 are made of a nonmagnetic material so that the supplied magnetic wire 204 can be swung from the apron 652 onto the paper layer. It is configured.

  The operation of the magnetic wire sprinkling device 600 configured as described above will be briefly described as follows.

  When the surface of the magnetic wire 204 in the water suspension is subjected to a hydrophilic treatment in the bubble generation tank of the storage tank, first, after beating hardwood bleached kraft pulp (LBKP), starch, a fixing agent, etc. are added. The adjusted papermaking raw material is supplied to the first paper layer forming head box 4 and the second paper layer forming head box 6.

  In the above description, the example in which the same papermaking raw material is supplied to the first paper layer forming head box 4 and the second paper layer forming head box 6 has been described. It is not limited to supplying the same papermaking raw material to the box 4 and the second paper layer forming head box 6.

  After the papermaking raw material is supplied to the first paper layer forming head box 4 and the second paper layer forming head box 6, when the paper machine provided with the magnetic wire sprinkling device 600 is operated, it is supplied from the supply pipe 656. The magnetic wire 204 supplied from the lamp 658 and the magnetic wire 204 are mixed in the bubble generation tank 653 to generate a water suspension of the magnetic wire 204.

  The magnetic wire 204 of the water suspension stored in the generation tank 653 is drawn into the bubbles generated in the water suspension 10 of the bubble generation tank 653 so that the magnetic wire 204 moves upward from the bubble generation tank 653. The water suspension 10 overflows from the outlet 605 a of the bubble generation tank 653 and is discharged onto the apron 652.

  The magnetic wire 204 diffused in the water suspension supply tank 654 is made permanent by driving a drive motor fitted with the pulley 31 of the belt 21 with the permanent magnet 20 bonded to a predetermined position at a predetermined timing. It is moved from the water suspension supply tank 554 to the bubble generation tank 553 along the bottom surface of the storage tank 651 while being dragged along with the movement of the magnet 20.

  The aqueous suspension 10 of the magnetic wire 204 discharged on the apron 652 flows along the apron 652 to the lower part of the apron 652, and the first papermaking raw material 9 supplied onto the papermaking net 3 at the lower end of the apron 652 is supplied. Immediately after the water runs out, the magnetic wire 204 is sprinkled on the first papermaking raw material 9 together with the aqueous suspension 10 to form the magnetic wire mixed layer 202 as shown in FIG.

  The first papermaking raw material 9 formed in two layers on the papermaking net 3 and the aqueous suspension 10 of the magnetic wire 204 are further drained with the movement of the papermaking net 3 and immediately below the second paper layer forming head box 6. The second papermaking raw material 11 is supplied from the discharge port 6 a of the second paper layer forming head box 6, and the first papermaking raw material 9, the aqueous suspension 10 of the magnetic wire 204, and the second papermaking raw material 11. Formed in the structure.

  After the three-layer structure is formed, the second papermaking raw material 11 is dehydrated, dried by a cylinder dryer, moved with the papermaking net 3, and discharged from the papermaking machine 100.

  It was confirmed that the security paper produced in this way was able to detect the pulse signal due to the large Barkhausen effect of the magnetic wire from a distance of 1 meter by the detection device for the large Barkhausen signal of the magnetic wire as described above. .

Conceptual diagram of security paper manufacturing apparatus (paper machine) according to the present invention Structure diagram of security paper according to the present invention Explanatory drawing explaining the characteristics of the large Barkhausen effect The figure which shows the detail of the magnetic wire sprinkling apparatus of the paper machine concerning this invention Configuration diagram of a magnetic wire sprinkling device other than the magnetic wire sprinkling device shown in FIG. Configuration diagram of a magnetic wire sprinkling device other than the magnetic wire sprinkling device shown in FIG.

Explanation of symbols

1, 2 Pulley (for paper mesh)
DESCRIPTION OF SYMBOLS 3 Paper network 4 Head box for 1st paper layer formation 4a Discharge port 5,500,600 Magnetic wire sprinkling device 5a, 500a, 600a Discharge port 6 Head box for 2nd paper layer formation 6a Discharge port 7 Table roll 8 Suction box 9 1st papermaking raw material 10 Magnetic wire aqueous suspension 11 2nd papermaking raw material 12 Papermaking net and papermaking moving direction 20 Permanent magnet 21 Belt 30, 31 Pulley (for belt)
51 Storage tank 52,552,652 Apron 53,553,653 Bubble generation tank 54,554,654 Water suspension supply tank 55,555,655 Partition plate 56,556,656 Supply pipe 57,557,657 Compressed gas feed Imprint 200, 300 Security paper 201 First paper layer 202 Magnetic wire mixed layer 203 Second paper layer 204 Magnetic wire 301 Alternating magnetic field 311 Magnetic wire L
312 Magnetic wire 2L
313 Magnetic wire 3L
314 Magnetic wire 4L
658 lamp

Claims (14)

On the papermaking net of the paper machine, a first paper layer forming tank and a second paper layer forming tank in which paper raw materials are respectively stored are arranged,
A magnetic wire supply tank is disposed between the first paper layer forming tank and the second paper layer forming tank on the papermaking net to store a water suspension obtained by mixing magnetic wire and water. And
Bubbles are generated in the water suspension stored in the magnetic wire supply tank, and the water suspension is formed by the bubbles from the magnetic wire supply tank and the paper raw material from the first paper layer forming tank. The magnetic wire contained in the aqueous suspension is distributed and disposed on the first paper layer by supplying the first paper layer by overflowing the first paper layer,
A security paper manufacturing method, wherein a second paper layer is formed by supplying a paper raw material from the second paper layer forming tank onto the first paper layer in which the magnetic wires are dispersedly arranged. The security paper manufacturing method according to claim 1, wherein a surface of the magnetic wire is coated with a hydrophilic material. The security paper manufacturing method according to claim 1, wherein the magnetic wire has a hydrophilic surface. The security paper manufacturing method according to claim 2, wherein the magnetic wire has a characteristic of a large Barkhausen effect. A magnet movable in a predetermined direction is installed on the bottom surface of the magnetic wire supply tank,
The security paper manufacturing method according to claim 1, wherein the magnetic wire in the aqueous suspension is moved to a region where the bubbles are generated by moving the magnet in a predetermined direction. By supplying the magnetic wire into the water previously supplied to the magnetic wire storage tank, the supplied magnetic wire reacts with water in the magnetic wire storage tank and is subjected to a hydrophilic treatment. The security paper manufacturing method according to claim 3. A first paper layer;
A plurality of magnetic wire layers distributed on the first paper layer;
A security paper, comprising: a second paper layer formed on the magnetic wire layer. The magnetic wire of the magnetic wire layer is
The security paper according to claim 7, wherein the surface is coated with a hydrophilic material. The magnetic wire of the magnetic wire layer is
The security paper according to claim 7, wherein the surface is subjected to hydrophilic treatment. The magnetic wire of the magnetic wire layer is
The security paper according to claim 8, wherein the security paper has a characteristic of a large Barkhausen effect. The magnetic wire of the magnetic wire layer is
The security paper according to claim 7, which has a length corresponding to the information to be added. The magnetic wire of the magnetic wire layer is
The security paper according to claim 7, wherein the length differs according to the information to be added. On the papermaking net of the paper machine, a first paper layer forming tank and a second paper layer forming tank in which paper raw materials are respectively stored are arranged,
A magnetic wire supply tank is disposed between the first paper layer forming tank and the second paper layer forming tank on the papermaking net to store a water suspension obtained by mixing magnetic wire and water. A security paper manufacturing apparatus,
The magnetic wire supply tank is
Bubble generating means for generating bubbles in the aqueous suspension stored in the magnetic wire supply tank;
The water suspension is overflowed from the magnetic wire supply tank by the bubbles generated by the bubble generating means and is supplied onto the first paper layer formed from the paper raw material from the first paper layer forming tank. A supply means,
The magnetic wire contained in the water suspension is dispersedly disposed on the first paper layer, and the second paper layer forming tank is disposed on the first paper layer on which the magnetic wire is dispersedly disposed. A security paper manufacturing apparatus, wherein a second paper layer is formed by supplying a paper raw material. The magnetic wire supply tank is
It has a magnet that can move in the specified direction on the bottom,
The security paper manufacturing apparatus according to claim 13, wherein the magnetic wire in the water suspension is moved to a region where the bubbles are generated by moving the magnet in a predetermined direction.

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