DE102020212977A1 - Security element with window bracket and method for production - Google Patents

Abstract

The invention relates to a security element (1) and a method for its production, which has a security element body (20) with a window area (25), in which the material of the security element body (20) is placed between an upper side (21) and an underside (22). is transparent, the window area (25) being surrounded and delimited all the way round by a non-transparent area of the security element body (20), characterized in that the window area (25) merges into a transparent window extension which extends into the non-transparent area, wherein the window extension (60), however, is not completely transparently covered both on the upper side (21) and on the lower side (22) of the security element body (20).

Description

The invention relates to a security element with a security element body in which a window area is formed. The security element can be a semi-finished product for the production of security documents or a security document itself.

A feature that is intended to prevent imitation, falsification, unauthorized manufacture and/or to guarantee the authenticity and integrity of the item is referred to as a security feature. A physical object that has such a feature is referred to as a security element. Typical security elements are, for example, holograms, security threads, but also complete security documents or security document blanks.

One class of security features and security elements provides for them to be checked and/or verified optically, i.e. by means of a visual inspection, the recording of images and their evaluation and/or other optical methods. Here, different optical features can be used and/or checked.

Such an optical feature is, for example, the ability to transmit light. Materials through which light can pass almost unhindered, such as clear window panes, are referred to as transparent in the context of what is described here. This means that images according to geometric optics are possible through the material. This can optionally be limited to a specific wavelength range of the human-visible spectral range. This is the case, for example, with colored clear glass or plastic.

Material that has a high transmission of light, but scatters it diffusely on the inside, is referred to here as translucent.

In the field of security documents, printed, filled plastic cards are usually referred to as opaque. Nevertheless, when viewed in front of a light source such that the light source is located behind the security element in the viewing direction, such objects also generally exhibit a certain transmission of light.

In connection with what is described here, a distinction is made between transparent material and non-transparent material, which includes both opaque and translucent material.

Modern security documents, which have one or more non-transparent material layers and/or printing, sometimes have a so-called window in which the material is completely transparent in volume from an upper side to an underside. Introduced markings, for example in the form of local blackening by laser inscription and a partial imprint of individual alphanumeric characters or pixels on the inside, do not fundamentally change the property that it is a window. However, extensive overprints of material that is transparent in volume by non-transparent material or overlaps by non-transparent material layers result in the corresponding covered or area overprinted area being regarded as a non-transparent area of the corresponding security element.

An example of a security document with a pane is in the DE 10 2016 203 609 A1 described.

In addition to very complex security features, which require a great deal of effort for verification, there is always the need to integrate security features that are easy to check into security elements. The invention is therefore based on the object of creating a security element and a method for producing it, with which a security feature that is easy to verify but not easy to imitate is formed.

The invention is achieved according to the invention by a security element having the features of patent claim 1 and a method having the features of patent claim 10 . Advantageous configurations of the invention result from the dependent claims.

basic idea of the invention

The invention is based on the general idea of creating a volume area made of transparent material inside the security element, which on the one hand forms a window area extending from the top to an opposite underside of the security element body, but forms an extension in cross section inside between the top and the opposite underside which is larger than the cross-sectional areas of the window portion of the top and bottom formed to be flush with each other. This makes it possible for light that passes through the window area to partially reach that area, which is referred to here as the window cantilever, which is translucently covered on the top and bottom, so that the This transparent area is not recognizable in plan view.

Viewing and/or capturing an image in which illumination and capturing takes place from the same side of the security element is referred to as a top view. On the other hand, a transmitted-light observation is an observation or detection of an image of the security element, in which the light source is located on the side of the security element facing the detection. In transmitted-light observation, light is thus radiated onto the surface facing away from the viewer or the optical detection device, and that light which is transmitted through the security element body is detected. Due to the fact that the security element body comprises transparent material in the area of the window arm, the transmission through the security element body in the area of the window arm is increased compared to other areas, provided that light is transmitted at all through the security element body. These statements also apply in each case when the window area is covered during viewing, so that no light inside the security element body can reach the window bracket through the window area. If light is additionally or simultaneously radiated through the window area, the window bracket appears even more prominently with suitable lighting and viewing directions, i.e. as a difference in contrast in the security element body in the window bracket area relative to the other non-transparent areas adjacent to the window area and/or the window bracket area.

definitions

The window area is the area on a surface of the security element body through which it is possible to see through the security element body, through the transparent material in the interior to the opposite side. Areas in which this is not possible are referred to as non-transparent areas of the security element body. The non-transparent area below which the window cantilevers, i.e. the transparent material connected to the see-through window, is located is referred to as the cantilever area.

A transparent material is a material that is clear in volume, possibly colored, but through which imaging according to geometric optics is possible with light of at least one wavelength in the visible wavelength range, i.e. the wavelength range that can be perceived by humans.

Preferred Embodiments

In particular, a security element is created with a security element body, which has a window area in which the material of the security element body is transparent between a top and a bottom, the window area being surrounded and delimited all the way around by a non-transparent area of the security element body, the window area turning into a transparent one Window boom goes over, which extends into the non-transparent area, but the window boom is completely covered in a non-transparent manner both to the top and to the bottom of the security element body. Furthermore, a method for producing a security element is created, which comprises a security element body with a window area extending from a top to a bottom, which is formed from transparent material, which transitions into a window extension, the transparent material of which completely extends to the top and to the bottom is covered in a non-transparent manner, comprising: providing a core layer which is non-transparent at least in a surface section; introducing a recess into the core layer within the non-transparent surface section, so that the recess is surrounded circumferentially by a non-transparent part of the surface section; inserting transparent material into the recess; non-transparently covering a cantilever portion of the recess to the top and bottom and applying heat to form the security element body. The core layer itself can consist of a plastic material or also be a composite of several material layers, in which, for example, other elements and security features are integrated.

It is therefore particularly preferred that the security element body has at least one non-transparent core layer with a recess which encloses the window area but is larger than the window area. In the finished security element body, the material of the window area, which is transparent in volume, thus also extends into a so-called window extension section of the recess in the core layer. This window cantilever area is completely covered in a non-transparent manner both on the top and on the underside of the security element body. The contour of the recess can partially be the outer contour of the window area, but is "larger" than the window area in at least one area.

A good and simple cover of the window arm to the top and / or bottom is achieved in an embodiment in which it is provided that the window arm to the top side is covered by a non-transparent volume in the upper cover layer and / or the bottom by a non-transparent volume in the lower cover layer. A layer that is self-supporting before being connected to the core layer and the material of the window bracket is regarded here as the cover layer. A pure print layer, made of ink or printing ink, which is not self-supporting, is not considered to be a cover layer in the sense of the description here.

In other embodiments it can be provided that the window extension is covered on the top side by a non-transparent top coating and/or on the bottom side by a non-transparent bottom coating. Coatings can be applied, for example, by vapor deposition or by any desired printing process. For example, the masking can be done by a top masking print or a bottom masking print. In this case, the cover prints or the cover coatings are aligned with one another at a boundary line between the window area and the window bracket. This means that in a vertical plan view, or if the boundaries of the window area are otherwise aligned with respect to another preferred direction, the cover coatings are aligned with one another with respect to the normal or other designated direction. When looking at the window area, the window extension can only be recognized by the fact that a part of the inner wall is transparent and not opaque. The same applies to the upper and lower cover layer, which are also aligned at the boundary line between the window area and the cantilever area with respect to the surface normal or a preferred direction with respect to which the boundary of the window area is aligned.

1. (a) zunächst ein erster Aussparungsabschnitt ausgebildet wird, der den Fensterauslegerabschnitt und ein Teil des Fensterbereichs umfasst,
2. (b) in den ersten Aussparungsabschnitt transparentes Material eingefügt wird, welches den Fensterauslegerabschnitt ausfüllt und eine Grenzlinie zwischen dem Fensterauslegerabschnitt und dem Fensterbereich vollständig überdeckt, und
3. (c) der Fensterauslegerabschnitt mindestens zu der Oberseite durch eine im Bereich des Fensterauslegerabschnitts nichttransparente obere Abdeckschicht und/oder an der Unterseite durch eine im Bereich des Fensterauslegerabschnitts nichttransparente untere Abdeckschicht abgedeckt wird, und
4. (d) die Kernschicht das eingefüllte transparente Material und die obere Abdeckschicht und/oder die untere Abdeckschicht punktuell miteinander verbunden werden, und
5. (e) anschließend die Aussparung der Kernschicht erweitert wird, sodass die Kernschicht im Fensterbereich der Aussparung frei von Material ist, wobei zeitgleich in die obere Abdeckschicht und/oder die untere Abdeckschicht ebenfalls Aussparungen eingebracht werden, die mit dem Fensterbereich der Aussparung in der Kernschicht fluchten, und
6. (f) Einbringen von transparentem Material zum bündigen Verfüllen der Aussparung.

In order to produce such a security element body, one embodiment provides that the recess is made in the core layer and the filling with transparent material takes place in a plurality of processes or process steps, which include that

1. (a) a first recess section is first formed, which comprises the window arm section and a part of the window area,
2. (b) inserting transparent material into the first recess portion, filling the window arm portion and completely covering a boundary line between the window arm portion and the window area, and
3. (c) the window arm section is covered at least on the upper side by a non-transparent upper cover layer in the area of the window arm section and/or on the underside by a non-transparent lower cover layer in the area of the window arm section, and
4. (d) the core layer, the filled-in transparent material and the upper covering layer and/or the lower covering layer are connected to one another at points, and
5. (e) the gap in the core layer is then widened so that the core layer is free of material in the window area of the gap, with gaps also being introduced at the same time into the upper cover layer and/or the lower cover layer, which are aligned with the window area of the gap in the core layer , and
6. (f) Introduction of transparent material for flush filling of the recess.

In this embodiment, it is ensured that the non-transparent material layers surrounding the window area, for example the upper cover layer and/or the lower cover layer, have the same cutout cross section as the window area of the core layer. In addition, a good, secure connection to the transparent material of the window bracket is achieved, which is first introduced in such a way that it partially protrudes into the window area. When expanding the core layer cut-out, in addition to non-transparent material of the core layer, that part of the transparent material of the boom section that protrudes beyond the border lines into the window area is also removed from the window area, so that an optimal connection of the transparent material of the boom section with the and located in the window area transparent material inserted therein.

The introduction of the transparent material into the cantilever section in method step (b) is preferably carried out by means of a one-piece cantilever insert. Additionally or alternatively, the transparent material is inserted in method step (f) by means of a one-piece window plug. In both cases it is ensured that the corresponding recess or a section/area can be reliably filled in in a simple manner in the first case of the cantilever section and in the second case of the window area. In particular, if the security element or the security element body is a lamination body, which consists of more than the core layer and optionally an upper and/or lower cover layer, preferred embodiments provide that the core layer is applied before and/or after method step (c). the top or the underside is covered with one or more further layers and the method steps (d), (e) and (f) are carried out as for the one upper covering layer and/or the lower covering layer. Further layers can thus be stacked one on top of the other and connected to one another at points in order to provide them with the recess for the window area at the same time as the other layers. This is preferably done in a punching process.

In a preferred embodiment, gaps are not introduced parallel to the surface normal of the respective layers, but at an angle. In this way it can be achieved that inserted transparent pieces of material, such as the cantilever insert or the window plug, are held in spite of the force of gravity when they are assembled in the respective layers, the surfaces of which are oriented parallel to the earth's surface, for example. This makes handling easier.

Even more preferably, the material processing is carried out in such a way that the recesses produced have beveled side walls, for example tapering conically along the direction of introduction transversely to the surface of the material layer. Such recesses with side or boundary walls which are beveled relative to a surface normal of the material layer or the uppermost material layer in the case of several stacked material layers and/or which taper along the recess depth can be produced by means of laser processing or water jet techniques. Correspondingly adapted pieces of material that are inserted can thus be optimally held in the recesses during production. It goes without saying that the inserted pieces of material, such as the cantilever insert or the window plug, have correspondingly adapted oblique outer walls or tapering along their material thickness, so that an optimal form fit takes place when inserted into the recesses formed. Pieces of material to be inserted can be in the form of injection molded parts, for example.

Pieces of material that are inserted into recesses with sloping or funnel-shaped side surfaces do not usually have to be secured by stapling (e.g. adjoining layers to the layer having the recess or to the layer in which they are inserted, and are only secured in a final letterpress -High-temperature lamination process cohesively integrated into the document body.

The assembly of the individual components to form the lamination body is preferably carried out in such a way that heat is introduced and pressure is applied with a lamination press in order to connect the transparent material to the core layer and the upper cover layer and/or the lower cover layer to form the security element body. If further layers of material are present, these are also connected in this lamination step in the lamination press to form the security element body.

The security element body can represent a semi-finished product or a finished security document. If this is produced as a semi-finished product, it is preferred that one or more layers that are transparent in volume are additionally applied to the top and/or bottom, which layers serve, for example, as protective layers or contain other security features, such as a hologram or the like.

• 1 eine schematische Draufsicht auf ein Sicherheitselement;
• 2 eine schematische Schnittansicht durch ein Sicherheitselement nach 1;
• 3 eine schematische Draufsicht auf die Unterseite des Sicherheitselements nach 1 und 2;
• 4 eine schematische Schnittansicht durch eine weitere Ausführungsform eines Sicherheitselements;
• 5 eine weitere schematische Schnittansicht noch eines anderen Sicherheitselements;
• 6 eine schematische Explosionszeichnung eines Sicherheitselements;
• 7 eine weitere Explosionszeichnung eines anderen Sicherheitselements; und
• 8 eine schematische Draufsicht auf ein sich ergebendes Sicherheitsdokument mit einem Fensterbereich.

The invention is explained in more detail below with reference to a drawing. Here show:

• 1 a schematic plan view of a security element;
• 2 a schematic sectional view through a security element 1 ;
• 3 a schematic top view of the underside of the security element 1 and 2 ;
• 4 a schematic sectional view through a further embodiment of a security element;
• 5 a further schematic sectional view of yet another security element;
• 6 a schematic exploded view of a security element;
• 7 another exploded view of another security element; and
• 8th a schematic plan view of a resulting security document with a window area.

In 1 a schematic plan view of a security element 1 is shown. The security element 1 is designed as a security document 10 . The security element 1 has a non-transparent area 26 which completely encloses and delimits a window area 25 . In the non-transparent area 26, the security element 1 is “opaque”. In the window area 25, on the other hand, it is transparent from an upper side 21 to an underside 22, which faces the plane of the drawing, so that it is possible to look through the window area 25 to information lying underneath.

In the interior of the security element 1 , which has a security element body 20 , a window extension is formed which consists of transparent material which merges into the transparent material 51 of the window area 25 . The window bracket 60 , which is located inside the bracket area 27 , is not transparently covered by the upper side 21 or the lower side 22 . The window extension 60 is therefore only shown in dashed lines in this view, since it cannot be seen through the non-transparent cover either from the top 21 or from the bottom 22 when viewed from above. However, if the security element 1 is arranged in front of a light source and viewed from the side facing away from the light source, transmission in the display area 27 is generally greater than in the rest of the non-transparent area 26. This is increased even more when light enters the window area 25 and enters the window bracket 60 partially through the transparent material 51 inside.

In all the figures, the same technical features are provided with the same reference numbers. The specific deviations from previously described embodiments and figures are described in each case. In 2 FIG. 1 is a schematic sectional view through the security element 1 according to FIG 1 shown. The transparent material 51 in the window area 25, which merges into the window bracket 60, is clearly visible. This is covered by an upper cover layer 70 on the upper side 21 and by the lower cover layer 80 on the underside 22 . The extension area is therefore not immediately recognizable when the security element 1 is viewed from above. The recesses 73 in the upper cover layer 70 and 83 in the lower cover layer 80 are identical to a window area 42 of the recess 40, which is however larger and also includes the offshoot section 41 in the core layer 30, which is non-transparent. Thus, the core layer 30, the top cover layer 100 and the bottom cover layer 110 are all made non-transparent. On the other hand, the window 50 in the window area 25 and the cantilever 60 in the cantilever area 26 are made of transparent material. The transparent material in the area of the cantilever 60 does not have to be identical to the transparent material of the window area 25 . However, it is necessary that this material should blend without a gap. This allows light to pass from the window 50 into the window bracket 60 . As a rule, however, it will be the same material, in particular a transparent plastic material, particularly preferably polycarbonate. The core layer 30 and the upper covering layer 70 and the lower covering layer 80 are also preferably made of a plastic material, particularly preferably made of the same material as the window 50 and the window bracket 60. Polycarbonate is particularly preferred here. However, any other plastics and also fiber-reinforced plastics can also be used. Both the core layer and the upper cover layer 70 or the lower cover layer 80 can be multi-layered, ie they can be composite products made up of several layers. In addition, these can contain a large number of different security features and/or security elements.

In 3 1 is the schematic top view of the underside of the security element 1 1 and 2 shown. Here, too, the non-transparent area 26 can be seen, which covers the boom area and encloses and delimits the window area 25 . The underside 22 of the security element 1 is also non-transparent in the extension area 27 .

In 4 a sectional view of a further security element 1 is shown schematically. This includes a core layer 30 with a recess 40 which is filled with transparent material 51 . The core layer is non-transparent, preferably opaque. The transparent material 51 is covered in the boom section 41 of the recess 40 on the top 21 by a top coating 100, for example a top cover print 101, and on the bottom 22 by a bottom coating 110, for example a bottom cover print 111, in each case non-transparent. When the security element 1 is viewed from the top 21, the window extension 60 cannot be seen because the non-transparent top coating 100 and when viewed from the bottom 22 by the bottom coating 110 do not transparently hide. When viewed in transmitted light, however, depending on the choice of coating, there is generally a higher transmission in the area of the delivery section 27 than in the remaining non-transparent area 28 of the non-transparent area 26 of the security element 1. In addition, light entering the window area 25 penetrates, also get into the window extension 60 and thus increase the visibility of the window extension 60 or the extension area 27 .

In 5 a further embodiment of a security element is shown schematically. This differs from the embodiment 4 in that the top coating 100 for covering and the bottom coating 110 for covering are applied on a transparent top protective layer 150 and a bottom protective layer 160, respectively. The printing to form one of the coatings 100, 110 on the upper or lower protective layer 150, 160 can be applied either to the side facing the core layer 30, as shown for the lower protective layer 160, or to the side remote from the core layer 30, as shown for the upper protective layer 150. FIG. The security elements 1 shown in the figures are preferably security document blanks which are combined with additional layers to form a security document body. However, they can also be ready-made security documents.

In 6 a schematic exploded view of a security element designed as a security document is shown. A core layer 30 has a cavity 40 with a window area 42 and a cantilever portion 41 . The boom area 40 is filled with transparent material in the form of a boom insert 61 , the boom insert being made of transparent material and slightly larger than the boom portion of the recess 40 . A part of the cantilever insert 61 thus protrudes into the window area of the recess or the future window area. Toward an upper side, the core layer 30 and the window cantilever insert 61 are covered with a data information layer 90, which is not transparent over its entire surface. These are connected to each other at points. The recess 40 is then widened in such a way that the window area is given its final shape. At the same time, an information layer gap 94 is produced in the information layer. Their edges are aligned with the window area 42 of the recess 40 in the core layer 30. In the process, part of the window extension insert 61 is also severed in order to ensure a clean connection between the transparent material of the window extension 60 and the material that covers the window area 42 of the recess 40 and the Window recess 94 in the information layer 90 filled. Here, a transparent window plug 53 is simultaneously inserted into the information layer 90 and the core layer 30 or their window openings 94, 42. In addition, an upper intermediate layer 180 and a lower intermediate layer 190 are joined to the core layer 30 and the information layer 90, with a non-transparent imprint 192 being applied to the lower intermediate layer 190, which leaves out the window area 25 precisely. An upper protective layer 150 is provided on an upper side 21 and a lower protective layer 160 is provided on the underside 22 . All of these layers are heated in a final lamination step and combined to form a security element body.

In an alternative embodiment, similar to the information side 90, a material layer that is not transparent in volume could also be provided below the core layer 30, in which a window cutout is made at the same time as the cutout 40 in the core layer is widened and the window cutout 94 in the information layer is made, after this further Layer has also been selectively connected to the others before forming the recess.

In 7 a further exploded view of another embodiment of a security document is shown schematically. In this embodiment, the information layer 90 is also the core layer 30 at the same time, into which the recess 40 is introduced. This includes the window area 42 and the extension section 41. The recess is filled with a one-piece transparent window extension insert 61. A transparent upper intermediate layer 180, which is printed in a non-transparent manner at least in the boom area 27, and an upper transparent protective layer 150 are arranged on the upper side. Under the information layer 90 there is a printed further lower intermediate layer 190, which is provided with an imprint 192 so that the intermediate layer 190 is not translucently printed at least in the boom area 27 and is not printed in the window area 25, as well as a lower protective layer 160. All layers are bonded together to form the security element body, which is then a security document body.

In another embodiment, the upper intermediate layer and the further lower intermediate layer can be omitted and the extension area can be overprinted on the protective layer of the upper protective layer or the transparent insert directly or towards the underside on the intermediate layer, the extension or the lower protective layer.

In 8th 1 is a schematic top view of a resulting security document 10 with a window area 25, together with an enlarged detail of the window 50, in which a projection 62 of the window extension 60, which extends into the non-transparent area of the security element, can be seen.

Although the recesses in the various illustrated embodiments have side or boundary surfaces oriented perpendicularly to the surfaces of the individual different layers, this is primarily due to a simplified illustration. Although cutouts with vertically oriented side surfaces represent possible embodiments, cutouts that are formed with inclined, in particular tapering, side surfaces are preferred. As a result, preferably one-piece pieces of material to be inserted can be used to fill the recess times are held during production. These have correspondingly adapted oblique or likewise tapered side surfaces.

Reference List

1

security element

10

security document

20

security element body

21

top

22

bottom

25

pane

26

non-transparent area

27

boom area

30

core layer

40

recess

41

boom section

42

window area of the recess

50

window

51

transparent material

53

window plug

60

window bracket

61

Window outrigger insert

62

Approach of the window bracket

70

top cover layer

73

Recess in the top cover layer

80

lower cover layer

83

Recess in the lower covering layer

90

information layer

94

window recess

100

top coating

101

top cover print

110

bottom coating

111

lower cover print

150

upper protective layer

160

lower protective layer

180

upper intermediate layer

190

lower intermediate layer

192

non-transparent imprint

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102016203609 A1 [0009]

Claims (10)

Security element (1) with a security element body (20) with a window area (25) in which the material of the security element body (20) is transparent between an upper side (21) and an underside (22), the window area (25) being surrounded by a is surrounded and delimited by the non-transparent area (26) of the security element body (20), characterized in that the window area (25) merges into a transparent window extension (60) which extends into the non-transparent area, the window extension (60) however is not completely transparently covered both to the top (21) and to the underside (22) of the security element body (20). Security element (1) after claim 1 , characterized in that the security element body has at least one non-transparent core layer (30) with a recess (40) which encloses the window area (25) but is larger than the window area (25). Security element (1) after claim 1 or 2 , characterized in that the window extension (60) is covered on the upper side (21) by an upper covering layer that is not transparent in volume and/or on the lower side (22) by a lower covering layer that is not transparent in volume. Security document according to one of the preceding claims, characterized in that the window extension (60) is covered on the top (21) by a non-transparent upper cover print (101) and/or on the underside (22) by a non-transparent lower cover print (111). Method for producing a security element, which comprises a security element body (20) with a window area (25) extending from a top side (21) to a bottom side (22); which is formed from transparent material, which merges into a window extension (60), the transparent material of which is completely covered in a non-transparent manner on the upper side (21) and the lower side (22). full Providing a core layer (30) that is not transparent at least in a surface section introducing a recess (40) into the core layer (30) within the non-transparent surface section, so that the recess (40) is circumferentially enclosed by a non-transparent part of the surface section, inserting transparent material into the recess (40); non-transparently covering a cantilever portion of the recess (40) to the top (21) and the bottom (22) and applying heat to form the security element body (20). procedure after claim 5 , characterized in that the introduction of the recess (40) into the core layer (30) and the filling with transparent material takes place in several processes and (a) first a first recess section is formed, which includes the window arm section and a part of the window area (25 ) includes; (b) transparent material is inserted into the first recess section, which material fills the window arm section and completely covers a boundary line between the window arm section and the window area (25) and (c) the window design section at least to the upper side (21) by a in the region of the window arm section ( 41) the non-transparent upper cover layer (70) and/or on the underside (22) is covered by a non-transparent lower cover layer (80) in the area of the window extension section (41), and (d) the core layer (30), the filled-in transparent Material and the upper covering layer and/or the lower covering layer are connected to one another at certain points; and (e) the recess (40) of the core layer (30) is then widened so that the core layer (30) is free of material in the window area (25) of the recess (40), the upper covering layer (70) and/or or the lower covering layer (80) is also provided with recesses which are aligned with the window area (25) of the recess (40) in the core layer (30) and (f) introducing transparent material to fill the recesses flush. Procedure according to one of Claims 5 or 6 , characterized in that the transparent material is inserted in method step (b) by means of a one-piece cantilever insert and/or in method step (f) the transparent material is introduced by means of a one-piece window plug (53). Procedure according to one of Claims 6 or 7 , characterized in that the core layer (30) is covered before and/or after method step (c) on the upper side (21) and/or the underside (22) with one or more further layers for the method steps (d) , (e) and (f) as for the one upper covering layer (70) and/or the lower covering layer (80). Procedure according to one of Claims 5 until 8th , characterized in that the introduction of heat takes place with a lamination press in order to Connecting transparent material to the core layer (30) and the top cover layer (70) and/or the bottom cover layer (80) to form the security element body (20). Procedure according to one of Claims 5 until 9 , characterized in that in addition to the top (21) and/or the bottom (22) one or more additional layers which are transparent in volume are applied.

Images