RU2450938C2 - Paper with intaglio print pattern for making covered instruments - Google Patents

Abstract

FIELD: printing.

SUBSTANCE: invention relates to a paper and method of its manufacture for covered instruments or securities, as well as to the form of intaglio print for pressing on such paper. The method consists in the fact that at the stage of intaglio print at least one protruding embossing design is applied on paper for production of covered instruments. At that during the stage of intaglio print additionally a set of leveling elements is created, which are distributed on the surface of the paper for production of covered instruments, having a convex relief structure.

EFFECT: alignment of the profile of paper for production of covered instruments documents.

30 cl, 10 dwg

Description

The present invention relates to paper for the manufacture of security documents, securities and similar objects having at least one embossed printing pattern. In addition, the invention also relates to an appropriate method of manufacturing paper and to an intaglio printing form for embossing on such paper for the manufacture of security documents.

Protected documents and securities, the commercial or utilitarian value of which far exceeds the material value, are generally made with the ability to establish their authenticity by appropriate measures and distinguish them from imitations and fakes. To this end, they are mainly equipped with special protective elements, which in the ideal case are impossible to imitate or extremely difficult and which cannot be faked.

The most significant are the protective elements that can be recognized by users without any devices and recognized as genuine, but, at the same time, their manufacture is characterized by a high degree of technical complexity or requires significant financial costs. Examples of such protective elements are watermarks, which can be placed in a document only during paper manufacturing, or printed images created by intaglio printing, which create characteristic tactile sensations that are easily recognized by non-specialists and cannot be reproduced by any other printing methods, in particular with using photocopy machines and scanners.

The technique of line or intaglio printing, in particular intaglio printing from a steel mold, is of great importance for printing security documents and securities. Intaglio printing is characterized by the fact that dash cells are engraved to create the desired printed image in printed form. These cells are created using a suitable engraving tool or etching.

Compared to other widely used printing techniques, intaglio printing allows, on the one hand, to apply ink with a very thick layer. In addition, paper can be pressed into recesses on a printing plate due to the application of considerable pressure when printing, even in areas not covered with ink. In this way a convex relief structure is created. The thick layer of ink formed when using gravure printing, as well as a partial deformation of the surface of the paper, are easily felt by non-specialists and therefore can be easily recognized as a sign of authenticity based on the tactile effect. This tactile effect cannot be imitated with a photocopier, therefore the intaglio printing technique provides a high degree of protection against fakes.

In the production of paper for the manufacture of security documents, after the intaglio printing stage, the sheets are stacked for further technological operations. Due to differences in height along the paper profile and due to the presence of convex intaglio printing elements, the stack takes on a substantially undulating shape, especially if intaglio printing has been applied only to a small part of the surface of the sheets. This leads to the slipping of individual sheets and the curing of the paint.

In this regard, the initial objective of the present invention is to offer paper for the manufacture of security documents, characterized as it was at the beginning of the description, which will be free from known shortcomings and which, in particular, can be more conveniently stacked in the process production. In addition to paper for the manufacture of security documents, the invention also provides an appropriate manufacturing method.

This goal is achieved in a production method having the features described in the main claim. Corresponding to this method paper for the manufacture of security documents and the form for gravure printing are defined in independent claims. Other improvements of the invention comprise the content of the dependent claims.

The present invention provides that according to the general characteristic of the method, the gravure printing step further creates a plurality of alignment elements with a convex relief structure that are distributed over the surface of the paper to uniformize its profile. As described in detail below, when stacking sheets used for the manufacture of security documents, the alignment elements play the role of spacers that give uniformity to the profile, thereby increasing the convenience of stacking and decreasing the fading of the paint in the stack. In addition, due to better air access, the ink dries faster on the prints of intaglio printing.

The advantage is that the alignment elements are distributed not only over the local protruding sections, but also over the entire surface of the sheet.

Advantages may be that alignment elements are created only outside of intaglio prints without altering their configuration and profile height.

Each sheet for the manufacture of security documents preferably contains several protruding sections, and the alignment elements are arranged substantially uniformly within the individual protruding sections, forming a generally uniform profile height over the entire surface. In this case, the alignment elements can be located the same or differently on different protruding sections. In the latter case, it becomes possible to use the layout of the leveling elements as machine-readable information for the recognition of individual protruding sections.

Instead of encoding such information in the arrangement of alignment elements or in addition to this encoding, information can be enclosed in the form of outlines and / or in the nature of the edge of alignment elements in separate protruding sections. The different nature of the edge can preferably be expressed in a different slope and / or spatial shape. For example, the edges may be stepped.

The advantage can be achieved by creating alignment elements with smooth edges with a slight slope to minimize the risk of paper damage during printing. Alignment elements are also preferably formed with rounded outlines, for example, in the form of circles, ellipses or ovals.

One of the possibilities of effectively imparting uniformity to the profile involves the creation of leveling elements with a large indentation depth. The advantage is that this takes into account the indentation depth of drawings applied in a similar way, i.e. intaglio printing, since in general, to align the profile, it is enough that the indentation depth of the leveling elements is at the maximum indentation depth of the intaglio prints. In the framework of the present invention, in particular, implementations with an indentation depth of from 40 to 260 μm, preferably from 60 to 120 μm and most preferably from 80 to 100 μm, are proposed.

Leveling elements can be created with colorless or colorful embossing.

Further improvement of this method provides that at the stage of intaglio printing, following the first stage of intaglio printing, at least one more drawing is applied to the paper for making security documents with the same intaglio method, and the alignment elements at this next stage of intaglio printing are essentially smoothed out . Although the advantages of this method can be used at the first stage of intaglio printing, the finished document acquires a smooth surface without any detectable leveling elements.

In particular, it can be envisaged that at the first stage and at the next stage of intaglio printing, paper is applied to the paper for the production of security documents by intaglio printing from opposite sides. The advantage is that the outlines of the intaglio prints in the first step and the outlines of the intaglio prints in the next step are selected so that the alignment elements of the first intaglio printing step are essentially smoothed out in the next intaglio printing step.

In yet another implementation of the invention, revealing additional advantages, paper for the manufacture of security documents contains several separate protruding sections, and at least a portion of the alignment elements are elongated in one direction in one or more corners of the individual protruding sections. Documents on which sheets of such paper are cut, due to this, can be given additional reliability in the corner sections, which are especially often bent. According to another implementation of the invention, revealing additional advantages, at least part of the alignment elements is located, extending in one direction in the center of one or more sides of the individual protruding sections. Documents on which sheets of such paper are cut, due to this, can be given additional reliability in the central areas, which are especially often folded.

The invention also includes paper for the manufacture of security documents, securities, and the like, having at least one embossed printing pattern. A lot of alignment elements with a convex relief structure are distributed on the surface of this paper for the manufacture of security documents to give a uniform profile to the paper. Features of the configuration and location of the leveling elements can be found in the above general description of the method.

The invention also encompasses documents of value, such as banknotes, identification cards, etc., which are made of paper for the manufacture of security documents of the type described.

The invention further relates to a gravure printing form for the production of security documents or securities having at least one engraved pattern in the form of a relief structure, in which a plurality of engraved alignment elements with a relief structure are distributed over the surface of the intaglio printing form to give uniformity of the profile of the printed paper for the manufacture of security documents. The alignment engraved elements are preferably distributed over the entire surface of the gravure printing form, i.e. not only in local protruding areas.

During the intaglio printing step, the engraved patterns of the printing form form the aforementioned patterns on the paper for making security documents, and the engraved alignment elements form the aforementioned alignment elements. Therefore, the features of the configuration and location of the engraved alignment elements can also be found in the above general characteristic of the method.

Further embodiments and advantages of the present invention are described below with reference to the drawings. For a better understanding, the scale and proportions in the drawings are not respected.

The drawings depict the following:

Figure 1 is a schematic illustration of a banknote according to the invention with two intaglio prints and a plurality of convex alignment elements created by colorless embossing;

Figure 2 is a section of a banknote along the line ∥-∥ shown in Figure 1, in the area of one of the convex alignment elements;

Figure 3 (a) - a sheet of paper for security documents of traditional manufacture with drawings printed by intaglio printing, (b) - a stack of sheets (a) having a wavy shape;

Figure 4 (a) is a sheet of paper for the manufacture of security documents according to the invention with intaglio prints and alignment elements created by colorless embossing, (b) is a few sheets of paper for the manufacture of security documents according to the invention, stacked one on top of the other , and (c) - an even stack of sheets (a);

5 is a banknote with alignment elements created by a bezelless embossing located at the corners, where (a) and (b) depict two examples of implementation, and

6 is a banknote with alignment elements created by a bezelless embossing located in the center of the sides, where two different implementations are shown in local views.

Further, the invention is disclosed in more detail by the example of a banknote. Figure 1 shows a schematic representation of a banknote 10, in which, in addition to the usual pattern and security elements not shown in the drawing, there are two intaglio prints 12 and 14, namely portrait 12 and numbers 14, indicating the face value, which can be detected by the user by touch.

In addition, the banknote 10 includes a plurality of alignment elements 16, created by intaglio printing by colorless embossing and having a convex relief structure, which serve to uniformize the profile of the paper for the manufacture of banknotes 10 as described below. The leveling elements 16 are distributed over the surface of the banknote 10 outside the elements 12 and 14 and are almost invisible to the user, since they are made by colorless embossing.

Figure 2 shows a section of a banknote 10 along the line ∥-∥ of Figure 1 in a section of one of the convex alignment elements 16. As can be seen from Figures 1 and 2 taken together, the alignment elements 16 have rounded outlines, for example, in the form of flattened bubbles. As can be seen from the cross section in FIG. 2, the alignment elements 16, which on the front side of the banknote are protrusions 16E, on the back of the banknote, are recesses 16V. In one embodiment, the transverse extent of the alignment element 16 is about 300 microns and can generally be from about 60 to 2000 microns.

In this embodiment, the embossing depth h of the alignment elements 16 is about 90 microns, but can generally be from about 40 to 260 microns.

To avoid paper damage during the intaglio printing step, alignment elements 16 are formed with smooth edges 18, i.e. with edges with a smooth slope. For example, the leveling elements 16 may have an average edge angle of about 30 ° to 50 °. The addition of such smoothing elements with smooth edges does not reduce the tensile strength of the paper from which the banknotes are made.

The special advantages acquired by paper for the manufacture of security documents, for example banknotes 10, due to the alignment elements 16 are described below in more detail using the schematic images in FIGS. 3 and 4.

First of all, FIG. 3 (a) shows paper 20 for security documents of traditional manufacture with several separate protruding portions 22, each of which has a portrait 12 and touch-sensitive numbers 14 created by intaglio printing. Due to the difference in height of the surface profile of the paper and the two gravure printing elements 12, 14, when stacking such sheets 20, a stack 24 of a substantially undulating shape is formed during the manufacturing process, as shown in FIG. 3 (b). In such undulating stacks 24, individual sheets 20 slide off easily and are relatively inconvenient to fold.

By using the leveling elements 16 according to the invention, stacking the embossed sheets in a stack can be significantly more convenient. As shown in Fig. 4 (a), on paper 30 for the manufacture of security documents, in this case, in addition to the portrait 12 made by intaglio printing and touch-sensitive numbers 14, several separate protruding portions 32 are formed having a plurality of alignment elements 16 created by colorless embossing .

The indentation depth of the alignment elements 16 here is commensurate with the indentation depth of the patterns printed by intaglio printing 12, 14, and preferably has the order of the greatest indentation depth, in the present example of implementation, the indentation depths of the figures 14. In addition, the alignment elements 16 are distributed over the surface of the manufacturing paper 30 security documents essentially uniformly and thereby effectively uniformize the entire profile of the sheet of paper 30 for the manufacture of security documents.

Thus, when stacking sheets of paper 30 for the manufacture of security documents according to the invention are arranged on top of each other substantially more evenly and form a substantially more even stack, as seen in the section of the sheets in FIG. 4 (b) and in the section of the full stack 34 in FIG. .4 (s). A more even stack is more convenient to process at subsequent technological stages. As can be seen directly from Figure 4 (b), the curing of the paint is also minimized, since the alignment elements 16 play the role of spacers.

Another advantage is the better drying of the ink during intaglio printing of the elements 12 and 14 of the pattern. When printing on paper 20 for security documents of traditional manufacture, areas without intaglio printing elements 12, 14 are calendared due to the high pressure applied during intaglio printing, and therefore the profile height in these areas is significantly reduced. In a stack of 24 traditionally made paper, these calendared sections, often vast in area, are often adjacent to each other, so that air access to the surface of the sheet is very limited.

Acting as spacers, the alignment elements 16, which, according to the invention, are distributed over the surface of the security paper 30, contribute to better air access to the local areas 12,14, which are intaglio printed, and the applied ink can dry out more with more air .

The leveling elements 16 can be distributed evenly or unevenly on the surface of the individual protruding portions 32 on the sheet of paper 30 for the manufacture of security documents. In this case, an advantage will be achieved if the maximum distance between adjacent alignment elements does not exceed some maximum value, depending on the type of paper used. Further developing the main idea of the invention, it is also possible to change the location of the alignment elements 16 from one protruding section to another. So, for example, the location of the alignment elements 16 can carry machine-readable information, allowing you to distinguish between different protruding sections 32.

Instead of alignment elements distributed substantially evenly over the surface of the individual protruding portions, or in addition to the elements distributed in such a way, the alignment elements can be arranged in special ways in separate sections, as shown in FIGS. 5 and 6.

On banknote 40 of FIG. 5, groups of alignment elements 44 created by bezelless embossing are located at respective angles 42. In the embodiment shown in FIG. 5 (a), alignment elements 44 are in the form of elongated ellipses, the main axes of which are parallel to each other and essentially in the direction of the corresponding angle 42. Another possible implementation example is shown in Fig. 5 (b), where the alignment elements 44 are formed by elongated ellipses, the main axes of which are oriented at the corresponding angle 42.

The manufacture of convex structures 42 in a special configuration, when they are oriented to the corners, as shown in Fig. 5 (a) or (b), not only gives uniformity to the profile, as described, but also increases the stiffness of the banknote 40 in its corner sections, which are especially often bent.

The advantage will also be achieved by aligning the alignment elements 56 in the center of the sides 52 or sides 54 of the banknote 50, as shown in the two implementation examples in FIG. 6. Thanks to the implementations shown here or the like, the stiffness of the banknote 50 is increased in the central sections of the sides, which are subjected to special load when folding.

If the paper for producing security documents according to the invention is subjected to the intaglio printing step on only one side, the alignment elements will be detected by touch in the finished document due to its relief structure. The same is true for the second stage of intaglio printing in the manufacture of documents by double-sided intaglio printing. And in this case, the alignment elements formed in the second stage of intaglio printing are felt on the finished security document.

If their detection by touch is not required and if the surface of the document outside the intaglio prints should be smooth, for example, with two-side intaglio printing, you can create alignment elements only at the first stage of intaglio printing, for example, forming the back of a banknote. The described advantages of the invention in this case can be used for operations of the first stage intaglio printing.

At the subsequent, second, intaglio printing stage, in order, for example, to form the front side of the banknote, new alignment elements are not squeezed out. In fact, this smooths out the alignment elements created in the first stage of intaglio printing due to the high embossing pressure in the second stage, so that alignment elements are no longer on the finished document. Of course, for these purposes, the drawings of the front and back should be appropriately matched to each other.

Claims (30)

1. A method of manufacturing paper for security documents or securities, in which at least one protruding embossed pattern is applied to the paper for the production of security documents at the intaglio printing stage, characterized in that during the intaglio printing step, a plurality of alignment elements are additionally distributed distributed over the surface of the paper for the manufacture of security documents having a convex embossed structure that aligns the profile of the paper for the manufacture of security documents. 2. The method according to claim 1, characterized in that the leveling elements are created outside of the drawings printed by intaglio printing. 3. The method according to claim 1, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and the alignment elements are located essentially evenly inside the separate protruding sections. 4. The method according to claim 1, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and the alignment elements are located differently on different protruding sections, and / or the location of the alignment elements on different protruding sections has a different configuration. 5. The method according to claim 1, characterized in that the alignment elements are performed with smooth edges with a slight slope. 6. The method according to claim 1, characterized in that the alignment elements have rounded outlines, in particular in the form of circles, ellipses or ovals. 7. The method according to claim 1, characterized in that the leveling elements have a large indentation depth, in particular a depth of from 40 to 260 microns, preferably from 60 to 120 microns and most preferably from 80 to 100 microns. 8. The method according to claim 1, characterized in that the leveling elements create a colorless embossing. 9. The method according to claim 1, characterized in that the leveling elements create colorful embossing. 10. The method according to claim 1, characterized in that the sheets of paper for the manufacture of security documents are stacked for further operations following the first step of intaglio printing. 11. The method according to claim 1, characterized in that at the intaglio printing stage following the first intaglio printing stage, at least one more intaglio printing is applied to the security paper, and the alignment elements during this next intaglio printing prints are essentially smoothed out. 12. The method according to claim 11, characterized in that at the first stage of intaglio printing and at the next stage of intaglio printing on paper for the manufacture of security documents apply drawings by intaglio printing from opposite sides. 13. The method according to claim 11 or 12, characterized in that the outlines of the intaglio printing drawings in the first stage and the outlines of the intaglio printing in the next stage are selected so that the alignment elements of the first intaglio printing stage are essentially smoothed out at the next stage of gravure printing. 14. The method according to claim 1, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and at least a portion of the alignment elements are stretched out in one direction in one or more corners of the individual protruding sections. 15. The method according to claim 1, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and at least a portion of the alignment elements are located extending in one direction in the center of one or more sides of the individual protruding sections. 16. Paper for the manufacture of security documents, securities and the like, having at least one protruding relief pattern applied by intaglio printing, characterized in that intaglio printing creates a plurality of alignment elements distributed over the surface of the paper for the manufacture of security documents and having convex relief structure, which gives uniformity to the paper profile for the manufacture of security documents. 17. Paper for the manufacture of security documents according to clause 16, characterized in that the alignment elements are located outside of the drawings printed by gravure printing. 18. Paper for the manufacture of security documents according to clause 16, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and the alignment elements are located essentially evenly inside the separate protruding sections. 19. Paper for the manufacture of security documents according to clause 16, characterized in that the surface of the paper for the manufacture of security documents contains several separate protruding sections, and the alignment elements are located differently on different protruding sections, and / or the alignment elements on different protruding sections have various configuration. 20. Paper for the manufacture of security documents according to clause 16, characterized in that the alignment elements have smooth edges with a slight slope. 21. Paper for the manufacture of security documents according to clause 16, characterized in that the alignment elements have rounded outlines, forming, in particular, circles, ellipses or ovals. 22. Paper for the manufacture of security documents according to clause 16, characterized in that the alignment elements have a height of from 40 to 260 microns, preferably from 60 to 120 microns and most preferably from 80 to 100 microns. 23. Paper for the manufacture of security documents according to clause 16, characterized in that the alignment elements are made by colorless embossing. 24. Paper for the manufacture of security documents according to clause 16, wherein the alignment elements are colorful embossed. 25. A document of value, such as a banknote, an identity card, etc., made of paper for the manufacture of security documents according to any one of claims 1 to 24. 26. A gravure printing form for security documents or securities, having at least one engraved pattern in the form of a relief structure, characterized in that a plurality of engraved alignment elements with a relief structure are distributed on the surface of the intaglio printing form to give a uniform profile printable paper for the manufacture of security documents. 27. The intaglio printing form according to claim 26, characterized in that the alignment elements are located outside the engraved patterns. 28. The gravure printing form according to claim 26, characterized in that the alignment elements have smooth edges with a slight slope. 29. The gravure printing form of Claim 26, wherein the alignment elements have rounded outlines that form, in particular, circles, ellipses or ovals. 30. The gravure printing form of Claim 26, wherein the alignment elements have an indentation depth of 40 to 260 microns, preferably 60 to 120 microns, and most preferably 80 to 100 microns.

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