RU2722091C2 - Method and device for production of counterfeit-proof paper with watermarks and integrated security element of window type - Google Patents

Abstract

FIELD: document security.

SUBSTANCE: invention relates to device (10) for production of counterfeit-proof paper (60) with watermarks (72) and integrated window security element (82), having: first device (12) for creating paper layers for forming first paper web (20) and for supplying first paper web (20) with watermarks (72), second device (14) for creating paper layers for creating second paper web (30), receiving mesh (16) for aligning and nondetachable connection of second paper web (30) to first paper web (20), device for insertion of endless security element (32, 82) into area (72) of watermarks between first and second paper web at combination of paper webs (20, 30) and suction device (50) for removing paper fibers from second paper web (30) in a wet state. Invention also relates to a method of producing counterfeit-proof paper with watermarks, as well as a multilayered counterfeit-proof paper and a valuable document.

EFFECT: invention enables to create a simple and low-cost method of making the counterfeit-proof paper of the above type.

10 cl, 4 dwg

Description

The invention relates to a method and apparatus for manufacturing counterfeit paper with watermarks and an integrated window-type security element. The invention also relates to a corresponding anti-counterfeit multilayer paper and to a valuable document.

Counterfeit paper or valuable security documents often provide authenticity features, such as watermarks, security threads and the like, which provide authentication of counterfeit paper or valuable document and at the same time serve as protection against illegal reproduction.

In the past, it has proven itself to be authenticity signs that can only be inserted into counterfeit paper at the time of manufacture, such as, for example, watermarks, chemicals, speckled fibers, or security threads inserted wholly or partially into counterfeit paper. In this case, security threads that are not completely applied to the surface of the security paper and are not completely inserted into the security paper are called window security threads. They are partially inserted into the counterfeit paper in such a way that they are visible on one or both opposite surfaces of the counterfeit paper only in certain window areas.

Based on this, the invention is based on the task of indicating a simple and low-cost method of manufacturing counterfeit paper of the above type. The method should, first of all, make it possible to produce counterfeit paper with the corresponding visual features, in which watermarks and security threads in the form of a window are combined with each other in a new way. The invention should also provide an appropriate device, as well as corresponding multilayer paper with counterfeit protection and a valuable document.

According to the invention, in a method for manufacturing counterfeit paper with watermarks and an integrated window-type security element, it is provided that:

- in the first device for creating paper layers form and watermark the first paper web,

- in the second device for creating paper layers create a second paper web,

- the second paper web is combined and indivisibly connected to the first paper web, and when combining the paper web in the watermark area, an endless safety element is laid between the first and second paper web, and

- by means of a suction and / or washing device, paper fibers are removed from the second paper web while still wet, so that the endless security element is freely accessible in the window areas of the second paper web.

From the point of view of the invention, the term "counterfeit paper" means paper without printing, which, as a rule, is in a kind of endless form and is further processed at a later point in time. Counterfeit paper is used primarily for the manufacture of valuable documents. Moreover, by “valuable document” is meant a document that is made for use in accordance with its purpose. Valuable documents in the sense of the present invention are, first of all, banknotes, stocks, loans, certificates, vouchers, checks, expensive entrance tickets, but also other threatened forgeries of paper, such as passports and other identification cards, as well as security features products, such as labels, prints, packaging, etc. The simplified name “security paper” or “valuable document” hereinafter includes all such documents and means of product safety.

The anti-counterfeit paper advantageously has several layers and contains at least one layer of paper. The additional layer or additional layers can also be made of paper, but also of other materials, such as polymer films.

The paper or paper layer, in a particularly preferred manner, contains cotton fibers, as they are used, for example, for banknotes.

In the sense of the invention, in the case of a device for creating paper layers, we are talking about a device, primarily a device for forming a paper sheet, to create a paper web. In the case of the device for creating paper layers, we can talk about a round-mesh paper machine, especially a countercurrent round-mesh paper machine, a direct-flow round-mesh paper machine or a double round-mesh paper machine. In addition, in the case of a device for creating paper layers, we can talk about a long-mesh paper machine. The paper web provided by the paper layer creating apparatus is preferably provided in the form of an endless paper web. Alternatively, a sheet of paper may be dispensed. In addition, the device for creating paper layers may include a nozzle for dispensing paper pulp to a screening device, such as a mesh cylinder or a long mesh, resulting in a paper web.

The endless security elements of the present invention, first of all, can be formed by protective threads or wide protective tapes. While security threads have a width of less than 4 mm, generally less than 2 mm, or typically about 1 mm, endless security elements with a width of 4 mm or more are referred to herein as security tapes. Protective tapes can, first of all, have a width of 4 mm to 20 mm, in part even up to 30 mm. Even if the invention is subsequently explained, mainly using thin protective threads, it is always understood that safety elements can also be formed by wide protective tapes. The introduction of wide protective tapes in the manufacture of paper is described, for example, in publication EP 0625431, the disclosure of the invention of which in this respect was included in the present patent application.

An endless security element can, for example, be a color overflow effect security element, with a diffractive structure such as a hologram, with a dynamic effect, if necessary, with partially interrupted metallization and / or with a printed pattern.

The window regions of the second paper web described above are then directly caused by the removal of paper fibers from the second paper web. In an advantageous embodiment of the invention, the window regions of the second paper web are precisely aligned with the watermarks of the first paper web. This primarily means that the shape and position of the window regions of the second paper web and thus also located between the window regions of the left paper regions corresponds to the shape and position of the watermarks of the first paper web. Advantageously, the shape and position of the window regions of the second paper web corresponds even to parts of the motif formed by watermarks. For example, window areas may overlap the first parts of the watermark motif, while the remaining parts of the paper of the second paper web overlap with the second parts of the motif. Therefore, due to the extra thickness of the paper, the second parts of the watermark motif seem even darker, and the first parts of the motif appear lighter.

Due to this, the window regions of the second paper web can enhance or emphasize the visual impression of the watermarks of the first paper web. The shape of the window regions of the second paper web and the watermarks of the first paper web are here in predominantly semantic communication, in particular the window regions and watermarks represent, respectively, related to each other or complementary pieces of information.

Since an endless security element in the watermark area is inserted between the first and second paper web and is also freely accessible in the window areas of the second paper web, the viewer has the impression that the endless security element is inside a watermark, namely in the window regions above the watermark and on the remaining paper regions — at least partially under the watermark. The safety element located inside the watermark is unusual and therefore noteworthy for the beholder and is associated with a high recognition rate.

In an advantageous embodiment of the invention, the paper fibers from the second paper web are removed before being combined with the first paper web. The paper fibers in this case, advantageously, are removed when combined with the position of the introduction of an infinite security element.

According to an improved embodiment of the invention, the first paper web is provided with a multi-stage watermark due to the fact that the paper stratification in the first device for creating paper layers, primarily in a round-mesh paper machine, occurs on a dewatering grid, the supporting grid of which in the partial region has a multi-stage relief in the form of a water sign. In this case, the multi-stage relief is preferably made by means of a die-cast, perforated watermark application module, by means of a deep drawing, perforated watermark application module or by a hot stamping, perforated watermark application module. The watermarking module, for example, can be implemented as a bronze stamp.

The advantage of the described method of action, first of all, is that the creation of watermarks is not associated with the creation of window areas and the introduction of endless security elements. In addition, the creation of window areas using the aforementioned suction and / or washing device makes it possible to accurately correlate the shape and position of the window areas with the shape and position of the watermarks of the first paper web. By introducing a security element between the first paper web of the first paper layer apparatus, for example a round-mesh paper machine, especially a direct-flow round-grid paper machine, and the second paper web, for example from a second paper layer apparatus, for example a mesh cylinder, an improved fit can also be achieved layers in the foot created by anti-counterfeiting paper.

The invention also comprises a device for manufacturing counterfeit paper with watermarks and an integrated window type security element, having:

- the first device for creating paper layers, especially a round-mesh paper machine, for example a direct-flow round-mesh paper machine for forming the first paper web and for supplying the first paper web with watermarks,

- a second device for creating paper layers for creating a second paper web,

- a receiving tape for combining and integral connection of the second paper web with the first paper web,

- a device for introducing an endless security element into the watermark area between the first and second paper web when combining paper webs, and

- a suction and / or washing device for removing paper fibers from the second paper web while still wet.

In an advantageous improved embodiment of the invention, the suction and / or washing device has an endless belt with at least one recess, the belt being tensioned by at least two positioned guide rollers. The suction device preferably also includes a suction roll or suction box for creating reduced pressure for suctioning the paper fibers through at least one recess of the endless belt. At least one recess of the endless ribbon corresponds to the created window regions on the second paper web.

The flushing device has an outlet device. The exhaust device is made to dispense fluid and is directed to the second paper web. Due to the directed dispensing of liquid through the holes, the paper fibers are purposefully washed out, so that at least one recess is created in the second paper web. On the opposite side of the outlet device of the second paper web, a receiving container is provided for receiving the washed paper fibers. An outlet device may be configured to influence the second paper web geometrically in the form of a recess. In addition, the abutment surface, which is located on the opposite side of the outlet device of the second paper web, may have holes.

The holes are made in accordance with the recess, so that when the surface of the second paper web is exposed, a recess is created. The contact surface is advantageously an endless tape. The surface of the fit can be made in the form of an endless tape.

In this case, the endless ribbon can be made of mesh fabric, for example, plastic, copper or bronze, or consist of a material which, in addition to at least one recess, has a closed surface.

Instead of the suction box, the suction device may also have a suction shaft or a tub-type cloth. To support suction on the side of the second paper web opposite to the suction device, at least one spray tube can be arranged that sprays liquid onto the second paper web to transport the suction fiber material through at least one recess of the endless belt to the suction roll or suction box. To clean the endless belt, the suction device may further comprise conditioning the net with cleaning spray tubes and tubular cloth washers.

The suction and / or washing device is advantageously located in the device between the second device for creating paper layers and the alignment position of the paper webs, so that the paper fibers can be removed from the second paper web before aligning with the first paper web and introducing a second endless security element.

Finally, the invention also comprises a multilayer security paper or a valuable document having:

- a first paper layer with a grammage of 60 g / m ² or more, in particular from 60 g / m ² to 80 g / m ² , and a second paper layer with a grammage of 45 g / m ² or less, previously connected to the first paper layer total from 10 to 45 g / m ² ,

- a watermark, especially a multi-stage watermark, in the first paper layer, and

- an endless security element that is introduced in the watermark region between the first and second paper layer and is freely available in the window regions of the second paper layer.

Advantageously, the window regions of the second paper layer are thus positioned with exact alignment relative to the watermark of the first paper layer. As explained above, this primarily means that the shape and position of the window regions of the second paper web and thus also between the window regions of the left paper regions corresponds to the shape and position of the watermarks of the first paper web, preferably even watermarked parts motive.

The shape of the window regions of the second paper layer and the watermarks of the first paper layer in this case are mainly in semantic connection, first of all, the window regions and watermarks represent, respectively, related to each other or complementary pieces of information.

Additional examples of implementation, as well as the advantages of the invention are explained below on the basis of figures, in the image of which the author abandoned the appropriate scale and proportions of the transmission to increase visibility.

The figures show:

FIG. 1 is a schematic representation of a paper machine with a round-mesh paper machine and a second paper layer device according to an embodiment of the invention,

FIG. 2 the suction device of the paper machine according to FIG. 1 in more detail,

FIG. 3 is a top view of a fragment of the cut-out paper of the anti-counterfeit paper proposed,

FIG. 4 is a sectional view of counterfeit paper of FIG. 3 along line IV-IV.

Now the invention is illustrated by the example of manufacturing protected from counterfeit paper for banknotes, which has a combination of security thread window type and multi-stage watermarks with high sharpness of parts. In FIG. 1, a paper machine 10 is schematically shown for this purpose with a first paper layer making device, in the present example, a round-mesh paper making machine 12, and a second paper layer making device 14, preferably a second round-mesh paper making machine.

In a round-mesh paper machine 12, mainly a direct-flow round-mesh paper machine 12, known per se, a paper web 20 is formed on the wire cylinder 18. The first paper web has, for example, a grammage of 60 to 80 g / m ² . The mesh cylinder 18 in this case is a dewatering mesh, the supporting mesh of which in at least one partial region is provided with a multi-stage relief in the form of a created watermark. The multi-stage relief is primarily formed by a die-cast perforated watermarking module, as more accurately described in WO 2008/071325 A1.

In parallel with the manufacture of the first paper web, in the second paper web creation apparatus 14, a second, first homogeneous paper web 30 is produced by spraying the pulp using a pressure nozzle 42 onto the surface of the mesh cylinder 44. The paper layer created by the second paper layer making apparatus 14 is very thin and has, for example, a grammage of only 10 to 25 g / m ² . The second paper web 30 is removed from the netting cylinder 44 by means of a removable cloth 16, which can also be understood as a removable net or a removable tape, and fed to the first paper machine 12, where it is connected to the first paper web 20 in the region of the pressure roller 36.

When combining paper webs 20, 30, in addition, an endless security element 32 is wound off the reel 34 and when connecting both paper webs 20, 30, it is inserted between the first 20 and the second paper web 30 in the region of a multi-stage watermark.

In addition, a suction device 50 is disposed between the second paper layer making device 14 and the pinch roller 36, which removes paper fibers from the second paper web 30 while still wet in precise alignment with the insertion position of the endless security element 32 and, moreover, in precise alignment with a multi-stage watermark of the first paper web 20.

The regions of the removed paper fibers form window regions in the second paper web 30, in which the endless security element 32 is visible and freely accessible after being inserted between the two paper webs 20, 30. In addition, the window regions of the second paper web 30 complement the watermarks of the first paper web 20 and are with them, first of all, in semantic connection, as explained further above as a whole, and also below on the basis of a particular embodiment.

Instead of or in addition to the suction device 50, a washing device 58 for removing paper fibers may be provided.

The paper webs 38 connected to each other then go to additional processing stations, such as calendaring, sizing, and the like.

In FIG. 2, the suction device 50, more precisely shown, has an endless belt 52 of mesh fabric that is mechanically tightly stretched through a series of guide rollers 54 with adjustable positioning. The endless belt 52 has one or more recesses that correspond in shape and size to the created window regions on the second paper web 30. Inside the endless belt 52 there is a slotted suction box 56, with which reduced pressure is created on the endless belt 52 and as a result can to be sucked paper fibers from the second paper web through the recesses of the tape 52 and the slots of the suction box 56.

Instead of the suction box 56, a suction roller or a tube cloth washer may also be used. To clean the tape 52, the suction device 50 may include a mesh conditioning system not shown in the figure, with cleaning spray tubes and tubular washers.

The multilayer anti-counterfeit paper 60, as it can be made using the paper machine of FIG. 1 is shown in a cut form in FIG. 3 and 4. Moreover, in FIG. 3 shows a top view of a fragment of the proposed anti-counterfeit paper 60 in a cut form, and FIG. 4 is a sectional view of counterfeit paper 60 along line IV-IV of FIG. 3 in the area of the inserted security thread 82.

The anti-counterfeit paper 60 contains a first, thicker paper layer 70 with a weight of 60 to 80 g / m ² , which is equipped with a multi-stage high-resolution watermark 72, which in the embodiment is made in the form of a sailboat. The first paper layer 70 is inseparably connected to the second, thinner paper layer 80, which has a grammar of only 10 to 45 g / m ² and is provided with window regions 84, which in shape and position are precisely aligned with a high resolution watermark 72. A window type security thread 82 is introduced between the first and second paper layer 70, 80, which is visible and easily accessible on the window regions 84 of the second paper layer 80. On the opposite side of the counterfeit paper, that is, when viewed from the side of the first paper layer 70, the security thread 82 is not visible in the plan view.

A feature of the combination of the watermark 72, the window regions 84 and the security thread 82 consists primarily in correlating both elements of the watermark and the window regions with each other with the exact combination that is possible due to the creation of the window regions 84 in the second paper layer 80 described above. Specifically, the window regions 84 in the exemplary embodiment are in the form of a negative image of the sail of the watermark 72, so that the paper regions 86 located between the window regions 84 have the shape of a sail represented by the watermark 72 of the sailboat, while the window regions 84 themselves overlap the intermediate spaces between the sails and the hull area of the sailboat.

As a result of introducing a security thread 82 in the form of a window between the first and second paper layer 70, 80 and matching the window regions 84 with the watermark 72, it seems to the viewer that the thread 82 passes inside the watermark 72. Although the watermark 72 itself is located under the thread 82 in the first the paper layer 70, the paper regions 86 in the form of a sail of the second paper layer partially cover the thread 82, and thus transfer the visual position of the watermark 72 from the first paper layer 70 to the second paper layer 80. Since the window regions 84 of the second paper layer 80 can be created using the suction device 50 described above with the desired shape and position, it is easy to correlate window areas 84 and correspondingly left paper areas 86 of the second paper layer 80 with exact alignment with the shape and position of the watermark 72 of the first paper layer 70. Visually impressive the appearance of the watermark, inside of which, it seems, a window-type security thread passes.

LIST OF REFERENCE NUMBERS

10 paper machine

12 first paper layer maker

14 second paper layer making apparatus

16 removable cloth

18 mesh cylinder

20 first paper web

30 second paper web

32 endless security

34 coil

36 pinch roller

38 interconnected paper webs

42 pressure nozzle

44 mesh cylinder

50 suction device

52 endless tape

54 guide roller

56 suction box

58 flushing device

60 anti-fake paper

70 first paper layer

72 watermark

74 window areas

76 additional safety feature

80 second paper layer

82 security thread window type

84 window areas

86 paper areas

Claims (24)

1. A method of manufacturing counterfeit paper with watermarks and an integrated window-type security element, in which: - in the first device for creating paper layers form and watermark the first paper web, - in the second device for creating paper layers create a second paper web, - the second paper web is combined and indivisibly connected to the first paper web, and when combining the paper web in the watermark area, an endless safety element is introduced between the first and second paper web, and - by means of a washing device, paper fibers are removed from the second paper web while still wet so that the endless security element is freely accessible in the window regions of the second paper web, moreover, the shape of the window regions of the second paper web and the watermarks of the first paper web are in semantic connection, first of all, the window regions and watermarks are respectively pieces of information connected to each other or complementary to each other. 2. The method according to p. 1, characterized in that the window area of the second paper web is created with precise alignment relative to the watermarks of the first paper web. 3. The method according to p. 1 or 2, characterized in that the paper fibers from the second paper web are removed before aligning with the first paper web. 4. The method according to one of paragraphs. 1-3, characterized in that the paper fibers are removed with precise alignment relative to the position of the introduction of the endless security element. 5. The method according to one of paragraphs. 1-4, characterized in that the first paper web is provided with a multi-stage watermark due to the fact that the paper stratification in the first device for creating paper layers occurs on a dewatering grid, the supporting grid of which in the partial region has a multi-stage relief in the form of a created watermark. 6. The method according to p. 5, in which the multi-stage relief is made using a die-cast perforated watermark application module, using a deep drawn, perforated watermark application module, using a hot stamping, perforated watermark application module and / or using the standard watermarking module. 7. A device for the manufacture of tamper-resistant paper with watermarks and an integrated window-type security element, having: - the first device for creating paper layers for forming the first paper web and for supplying the first paper web with watermarks, - a second device for creating paper layers for creating a second paper web, - a receiving grid for combining and integral connection of the second paper web with the first paper web, - a device for introducing an endless security element into the watermark area between the first and second paper webs when combining paper webs, and - a washing device for removing paper fibers from the second paper web in a still wet state, the washing device having an endless tape with at least one recess, the tape being tensioned by at least two guide rollers configured to adjust the position, and, advantageously, also has a washing device for washing paper fibers through at least one recess of the endless tape. 8. The device according to p. 7, characterized in that the washing device is located between the second device for creating paper layers and the position of combining paper webs. 9. A multilayer security paper or security document having (s): - a first paper layer with a grammage of 60 g / m ² or more, in particular from 60 g / m ² to 80 g / m ² , and a second paper layer with a grammage of 45 g / m ² or less, previously connected to the first paper layer total from 10 to 45 g / m ² , - a watermark, especially a multi-stage watermark in the first paper layer, and - an endless security element that is introduced in the watermark region between the first and second paper layers and is freely available in the window regions of the second paper layer, moreover, the shape of the window regions of the second paper web and the watermarks of the first paper web are in semantic connection, first of all, the window regions and watermarks are respectively pieces of information connected to each other or complementary to each other. 10. Tamper-resistant paper or valuable document according to claim 9, wherein the window regions of the second paper layer are positioned with exact alignment relative to the watermark of the first paper layer.

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