DE102017006708A1 - Drainage screen for papermaking - Google Patents

Abstract

The invention relates to a dewatering screen (20) for the production of watermarked paper, comprising a carrier screen (21) and at least one watermark element (40, 50, 102) arranged on the carrier screen with a relief in the form of a watermark to be produced. According to the invention, it is provided that the at least one watermark element is formed by a stick-relief structure (40, 50) embroidered on the carrier screen (21) or by a watermark insert (102) connected to the carrier screen (21) by stitching. The invention also relates to a round screen for a paper machine or the like, and to a method and an apparatus for producing a dewatering screen for the production of watermarked paper.

Description

The invention generally relates to a dewatering screen for the production of watermark paper. It relates in particular to a dewatering screen with a carrier screen and at least one watermark element arranged on the carrier screen with a relief in the form of a watermark to be generated. The invention also relates to a round screen for a paper machine or the like whose production screen jacket is formed by such a dewatering screen, and to a method and apparatus for producing a dewatering screen for the production of watermarked paper.

In papermaking on round screening or screening machines, pulp accumulates continuously on a moving dewatering screen and is solidified to the extent that it can be removed as a wet paper web for further processing of the dewatering screen. Above all, security papers for banknotes, identity documents and the like are often equipped with watermarks for security purposes, which permit verification of the authenticity of the security paper and which at the same time serve as protection against unauthorized reproduction.

For the production of detailed watermarks in Rundsiebechnologie typically a cylindrical welded Entwässerungssieb is used with a multilayer structure of different bronze screens. The desired watermark motifs can be embossed into the bronze screen or soldered onto the screen structure as so-called electrotypes. A generation of watermarks by means of a perforated injection-molded relief is also known and, for example, in the document DE 10 2006 058 513 A1 described.

The embossing of the bronze sieves, the soldered-on electrotypes and the injection-molded inserts each produce watermarks with an appearance in the paper that is characteristic of the respective technique. The combination of the above-mentioned techniques therefore makes it possible to generate structurally attractive, spatially-effective watermarks with high security against counterfeiting.

However, embossing and injection molding techniques can only be combined with bronze screens. By contrast, the plastic fabrics of plastic sieves can not be embossed, so there is currently no way to combine the injection-molded watermarks of the plastic sieves with embossed designs. Although plastic screens have various advantages over bronze screens and are extremely light and therefore easy to transport and readily stackable, especially with high stability, they currently can not provide the high attractiveness and designerial freedom that results from the combination of multiple watermarking techniques.

Proceeding from this, the present invention seeks to provide a dewatering screen of the type mentioned, which avoids the disadvantages of the prior art and in particular allows the creation of visually attractive watermarks with high security against counterfeiting.

This object is solved by the features of the independent claims. Further developments of the invention are the subject of the dependent claims.

According to the invention, it is provided in a generic dewatering screen that the at least one watermark element is formed by a stick-relief structure embroidered onto the carrier screen or by a watermark insert connected to the carrier screen by stitching.

As explained in more detail below, visually attractive watermarks with a strongly textile appearance in the paper can be produced with the aid of the embroidery technique. Such watermark elements can also be used in particular in plastic mesh fabrics and combined there with other watermarking techniques, in particular with injection-molded inserts.

In an advantageous embodiment, the embroidered embossed relief structure comprises a sequence of stitches to straight or curved lines that form a raised, unfilled ornament or a raised, unfilled continuous pattern. Alternatively or additionally, the embroidered embossed relief structure may also include a plurality of closely spaced zig-zag stitches forming a raised, filled ornament or a raised, filled continuous pattern. The raised lines of the embossed relief structure create bright lines in the watermark during papermaking, while the raised, closely spaced zig-zag stitches create bright-appearing areas in the watermark.

The embossed relief structures can also be designed in the form of characters, numbers and codes and represent, for example, an alphanumeric string, a serial number or a barcode. The term ornament therefore includes in the context of this description not only patterns, but in particular also characters, numbers and codes.

The embroidered relief structure embroidered onto the carrier screen can be next to her watermark-generating function also fulfill other functions. For example, the embossed-relief structure can be used to clean cut-off fabric edges of the screen fabric and to join two or more fabric layers. Depending on the type of screen fabric and the requirements of the seam, in particular with regard to mechanical strength, elasticity, visibility or invisibility, etc., a suitable stitch is used. In an advantageous embodiment, the embroidered embossed-relief structure connects two subregions of the carrier screen to one another, wherein, in particular, two edge regions of the carrier screen can be connected to the production screen jacket of a round screen. The zusammenzuschähenden edge portions are preferably sewn together shock to shock. It is also conceivable overlap of the edges or slightly spaced edges. Particularly preferably, the edges are formed so that they mesh in a grid-like manner during the impact-on-impact encounter. For example, the edges are cut in a zigzag shape or have rectangular recesses. The embroidered embossed relief structure serves both as a sieve seam and as a watermark-generating element in the connecting region of the two edge regions.

The possibility of sewing a dewatering screen with a stick-relief structure to the production screen jacket of a round screen allows for the first time the use of a plastic round screen. The sieve seam in the form of the stick-relief structure can be separated after paper production and the plastic production sieve sheath rolled flat or rolled up to a space-saving role. The particular advantages of plastic screens, namely in particular an optimized drainage, faster paper production, better anchoring of injection molding elements in the sieve, easier handling during screen production by the weight reduction, the lack of need for further Sieblagen as a substructure for the production screen and the simple storage of the production sieves are thus made available according to the invention for round screens.

The grid of the seam ensures the dimensional accuracy of the seam and requires no manual work to position the two edge areas during further processing.

Advantageously, a plastic adhesive is further applied in the connection region of the two subregions, which prevents a separation of the threads.

The embroidered embossed relief structure is advantageously formed by an embroidery thread, in particular completely formed by a single embroidery thread. The embroidery thread has a double function, since it forms the watermark-generating embroidery relief structure with its subareas lying above the surface of the support screen and, with its subregions engaging in the support screen, firmly bonds the embroidery relief structure to the screen fabric of the support screen.

The embroidery thread can be formed for example by a plastic multifilament thread. In principle, however, other embroidery threads suitable for the embroidery process come into consideration, which are tailored to the embroidery machine used, the embroidery needle and the screen mesh. Optionally, the embroidery thread can be used with a matching, different lower thread. The thread thickness can vary over a wide range, whereby the rule of thumb thread thickness ≈ mesh size - needle thickness has proven. The embroidery thread may consist in particular of polyester, polyetheretherketone, polyamide or another higher-value plastic.

In an advantageous embodiment, it is provided that a plurality of watermark elements is arranged on the carrier screen substantially nationwide, which produce a substantially nationwide watermark basic pattern in the paper in papermaking. Under a blanket arrangement is understood in this context, an arrangement in which the distance between adjacent watermark elements is not greater than twice the maximum diameter of the watermark elements. In an advantageous embodiment, the spacing of adjacent watermark elements is even at most as large as the maximum diameter of the watermark elements. In the case of endless watermark elements, instead of the maximum diameter, the transverse extent occurs perpendicular to the endless extent of the watermark elements. Such basic watermark patterns give the paper a characteristic overall appearance that is easy to check and distinguish from other paper designs.

The nationwide arranged watermark elements are formed in particular by embroidery relief structures in the form of ornaments or continuous patterns.

In a further development of the invention, the dewatering screen contains embroidered markings, such as control marks, track lines, register control marks or bow markings. These embroidered markings are provided in particular in addition to the useful watermarks already described in more detail.

In an advantageous variant of the invention, it is provided that the watermark insert connected to the carrier screen by stitching is replaced by a metal plate or an injection-molded insert is formed. The watermark insert serves to generate the desired watermark in the security paper and is designed accordingly. The combination of the watermark insert with the carrier wire by embroidering not only creates a strong bond between the two elements, but also creates a distinctive and visually attractive appearance in the joint area. Different stitches can be selected for attachment of the watermark insert, the visual appearance of which in the watermark can absorb or supplement the appearance of the watermark generated by the metal plate or the injection-molded insert.

It goes without saying that a dewatering screen can have embossed relief structures embroidered onto the carrier screen as well as watermark inserts connected to the carrier screen by embroidering, in order to further increase the creative possibilities of variation.

The designs described can also be advantageously used to produce webs for embedded window filaments. For this purpose, a plurality of watermark elements are advantageously arranged at a distance on the carrier screen, which are formed by web-shaped embroidered embossed relief structures or by bar-shaped web inserts connected to the carrier screen by embroidering.

The sieve fabric of the dewatering screen can be a metal fabric, in particular a bronze fabric, or a metal-plastic mixed fabric, in particular a bronze-plastic mixed fabric. At present, however, it is particularly preferred if the sieve fabric of the dewatering screen is a pure plastic fabric.

In an advantageous embodiment, the support screen in addition to said at least one watermark element in a partial area on a multi-level relief in the form of another watermark to be generated, wherein the multi-level relief is formed by an injection-molded, perforated watermark insert. The watermark insert can in particular be welded or adhesively bonded to the carrier screen, or be injected directly into the carrier screen. Further details of such an injection-molded, perforated watermark insert can the document DE 10 2006 058 513 A1 are removed, the disclosure of which is included in the present application in this respect.

• - einem ersten, groben Schussfadensystem auf der unterseitigen Maschinenseite des Siebgewebes,
• - einem zweiten, feinen Schussfadensystem auf der oberseitigen Papierseite des Siebgewebes,
• - einem dritten Schussfadensystem, das zwischen dem ersten und zweiten Schussfadensystem angeordnet ist, und
• - einem feinen Kett-Bindefadensystem, durch das die drei Schussfadensysteme miteinander verwoben sind.

In an advantageous embodiment, the carrier screen has a single-layer plastic screen fabric with three weft thread systems arranged one above the other and a warp binder thread system

• a first, coarse weft system on the underside of the machine screen,
• a second fine weft thread system on the upper side of the paper of the screen fabric,
• a third weft thread system interposed between the first and second weft threads, and
• a fine warp binding system through which the three weft systems are interwoven.

All three mentioned weft thread systems fulfill a specific function within the single-layer drainage wire. The first, coarse weft system serves as a stabilizing support system, the second, fine weft system provides a smooth, finely textured surface for paper formation and the third weft system serves to set a desired overall thickness of the mesh. The connection of the three weft thread systems arranged one above the other takes place exclusively via the warp binder thread system whose threads run perpendicular to the weft thread systems.

The threads of the first, second and third weft thread system advantageously run substantially all parallel to one another. The threads of the first, second and third weft thread system advantageously each form a thread plane which does not interfere with the thread plane of the other two weft thread systems. Unlike the filaments of the weft yarn systems, the filaments of the warp binding system are not limited to one plane, but extend partially above, below and between the planes of the three weft systems and thus interweave them with each other. The thread thickness of the third weft thread system arranged in the intermediate plane is advantageously selected such that a desired overall thickness of the screen fabric is achieved. In a preferred embodiment, the thread thickness of the third weft thread system is between the thread thickness of the first, coarse weft thread system and the thread thickness of the second, fine weft thread system.

Specifically, the thread thickness of the first weft thread system is advantageously between 0.5 and 0.8 mm, preferably about 0.6 mm. The thread thickness of the second weft thread system is advantageously between 0.1 and 0.3 mm, preferably about 0.2 mm, and the thread thickness of the third weft thread system is advantageously between 0.4 and 0.8 mm. The thread thickness of the warp binder thread system is advantageously between 0.05 and 0.2 mm, preferably about 0.15 mm. The fine weft thread system is preferably provided with a coating for warp stabilization, the may be formed for example by an impregnating coating. The thread systems of the dewatering screen are advantageously made of polyester, polyetheretherketone or another higher-value plastic.

The invention also includes a round screen for a paper machine or the like, having a production screen jacket formed by a dewatering screen of the type described.

The invention further includes a method of producing a dewatering screen for the production of watermarked paper in which a carrier screen is provided and at least one watermarking element having a relief in the form of a watermark to be formed is placed on the carrier screen by applying a stick relief structure to the screen A carrier wire is embroidered or by a watermark insert is connected by stitching to the carrier screen.

Finally, the invention also includes an apparatus for producing a dewatering screen for the production of watermarked paper, with a screen processing surface for receiving a dewatering screen, and with an embroidery head for embroidering a stick-relief structure on the carrier screen and / or for connecting a watermark insert to the carrier screen by embroidery.

• - eine Laserschneidvorrichtung zur Erzeugung von Aussparungen in dem Entwässerungssieb,
• - ein Spritzgusswerkzeug zur Erzeugung eines Wasserzeicheneinsatzes mit einem mehrstufigen Spritzgussrelief in den mit Aussparungen versehenen Bereichen des Entwässerungssiebs, und
• - eine Laserschneidvorrichtung zur Erzeugung von Entwässerungs-Perforationen in dem Wasserzeicheneinsatz.

In an advantageous embodiment, the device further comprises

• a laser cutting device for producing recesses in the dewatering screen,
• an injection molding tool for producing a watermark insert having a multi-stage injection molding relief in the recessed areas of the dewatering screen, and
• a laser cutter for creating drainage perforations in the watermark insert.

A suitable injection molding tool is for example in the document DE 10 2012 018 166 A1 described in more detail, the disclosure of which is included in the present application in this respect.

Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.

• 1 eine schematische Darstellung einer mit einem erfindungsgemäßen Entwässerungssieb hergestellten Banknote,
• 2 schematisch zwei Ausschnitte des zur Papierherstellung eingesetzten Kunststoffsiebs in Aufsicht, jeweils mit einer aufgestickten Stick-Reliefstruktur,
• 3 schematisch ein vorteilhaftes einlagiges Kunststoff-Trägersieb für das Entwässerungssieb der 2 im Querschnitt,
• 4 eine Aufsicht auf ein erfindungsgemäßes Trägersieb mit zwei Stick-Reliefstrukturen, jeweils in Form des Buchstabens „A“,
• 5 eine Aufsicht auf ein erfindungsgemäßes Trägersieb mit einer Vielzahl von Stick-Reliefstrukturen in Form kleiner sternförmiger Ornamente, die bei der Papierherstellung ein im Wesentlichen flächendeckendes Wasserzeichen-Grundmuster erzeugen,
• 6 eine Aufsicht auf ein erfindungsgemäßes Trägersieb mit einem flächendeckenden, endlosen Wasserzeichen-Grundmuster,
• 7 eine Aufsicht auf ein erfindungsgemäßes Trägersieb mit einer endlosen aufgestickten Stick-Reliefstruktur, die zwei Kantenbereiche eines Entwässerungssiebs zu einem Rundsieb verbindet, und
• 8 eine Aufsicht auf ein Trägersieb mit einem Wasserzeichenelement, das durch einen mit dem Trägersieb durch Sticken verbundenen Wasserzeicheneinsatz gebildet ist.

Show it:

• 1 a schematic representation of a banknote produced with a dewatering screen according to the invention,
• 2 schematically two sections of the plastic screen used for papermaking in plan view, each with an embroidered stick-relief structure,
• 3 schematically an advantageous single-layer plastic support screen for the dewatering screen 2 in cross section,
• 4 5 shows a plan view of a carrier screen according to the invention with two embossed relief structures, each in the form of the letter "A",
• 5 a plan view of a support screen according to the invention with a plurality of embossed relief structures in the form of small star-shaped ornaments, which produce a substantially nationwide watermark basic pattern in papermaking,
• 6 a plan view of an inventive carrier screen with a blanket, endless watermark basic pattern,
• 7 a plan view of an inventive support with an endless embroidered embroidery-relief structure that connects two edge portions of a Entwässungssiebs to a round screen, and
• 8th a plan view of a carrier wire with a watermark element, which is formed by a connected to the carrier wire by embroidering watermark insert.

The invention will now be explained using the example of a dewatering screen for the production of banknotes. 1 shows a schematic representation of a banknote produced with a dewatering screen according to the invention 10 , The banknote 10 contains, among other security and design features, not shown in the figure, in particular an ornamental watermark 12 and an infinite watermark extending across the entire width of the note 14 , In the presentation of 1 It should be noted that the watermarks 12 . 14 actually, in transmitted light, represent particularly bright spots in banknote paper. For better representability, the two watermarks are in 1 drawn inverted, so that the lines shown in black in the figure 16 . 17 or areas 18 actually appear in transmitted light as particularly bright lines or surfaces in appearance.

As a special feature are the ornamental watermark 12 and the endless watermark 14 produced by embroidered relief structures on the dewatering screen used for papermaking. They show a characteristic, strongly textile appearance, the security paper of the banknote 10 gives a characteristic character with high recognition value and thus also high security against counterfeiting. 2 schematically shows two sections of the plastic dewatering screen used for papermaking 20 in supervision. The plastic drainage screen 20 contains a carrier screen 21 , its single-layer plastic sieve fabric 30 in 3 is shown in more detail in cross section.

The single-layer plastic sieve fabric 30 contains three stacked weft thread systems 22 . 24 . 26 and a warp binder system interweaving the weft yarn systems 28 , where the section of the 3 parallel to the warp threads and perpendicular to the weft thread systems.

The underside machine side of the screen fabric 30 consists of a first, coarse weft system 22 whose parallel threads in the embodiment have a thread thickness of 0.6 mm and the screen fabric 30 give the necessary stability. The top paper side of the mesh 30 is through a second, fine weft system 24 formed, the parallel threads have a thread thickness of only 0.2 mm and which provides a finely structured surface for paper attachment. Between the first and second weft system 22 . 24 is a third weft system 26 arranged, wherein the thread thickness of the parallel threads of the third weft thread system 26 is chosen so that a desired total thickness of the mesh fabric 30 is reached. In the exemplary embodiment, the thread thickness of the parallel threads of the weft thread system 26 about 0.47 mm and results in a total thickness of the mesh 30 of 1.6 mm.

The weft thread systems 22 . 24 . 26 are with a fine warp binding system 28 whose thread thickness in the embodiment is 0.15 mm, interwoven with each other. In 3 are illustrative by solid or dotted lines by way of example two actually consecutive thread sections of the warp binder thread system 28 shown. The threads of the thread systems 22 . 24 . 26 . 28 may for example consist of polyester or polyetheretherketone.

To the watermarks 12 . 14 to produce is the support screen 21 with watermark elements in the form of embroidered embossed relief structures 40 . 50 Mistake. The stick relief structures 40 . 50 are doing so by a straight, bent or zig-zagging embroidery thread 42 respectively. 52 formed and at the same time by the same embroidery thread 42 . 52 firmly with the carrier screen 21 interwoven.

In the 2 Stick-relief structure shown on the left 40 includes a sequence of stitches to curved lines 44 on the surface of the carrier screen 21 form a raised, linear ornament piece. Another filled ornament piece 46 is formed by a variety of closely spaced zig-zag stitches, which together on the surface of the support wire 21 form a small, raised surface. While the sublime lines 44 in papermaking too bright lines 16 in the watermark 12 lead the raised surface of the zig-zag stitches a corresponding, uniformly bright appearing patch 18 in the watermark 12 ,

In the 2 right embossed relief structure 50 includes a sequence of stitches to straight lines 54 on the surface of the carrier screen 21 a raised, unfilled, continuous line pattern 54 form. The sublime line pattern 54 leads in the papermaking according to the bright in the transmitted light, from line pieces 17 formed endless line pattern of the watermark 14 ,

As embroidery thread, for example, a 100% polyamide multifilament thread can be used, specifically about an ONYX 80 Polyamide 6.6 thread.

The on the support screen 21 embroidered embossed relief structures may be formed in a variety of shapes and sizes. In addition to the already illustrated ornaments and continuous patterns, embossed relief structures in the form of characters, numbers and codings are also possible. Exemplary in the supervision of the 4 two embossed relief structures 60 . 70 each shown in the form of the letter "A". In the stick-relief structure shown on the left 60 is the embroidery thread 62 with a series of stitches to straight lines 64 arranged on the surface of the support screen forming the raised outline of the letter "A".

In the relief structure shown on the right 70 is with the embroidery thread a variety of closely spaced zig-zag stitches 72 formed, as in the detail 76 shown schematically. The zigzag stitches 72 fill in the outline 74 of the letter completely and form together on the surface of the support screen 21 a raised surface in the shape of the desired letter "A".

In paper production, the embossed relief structure creates 60 in the paper a watermark in the form of a bright letter outline "A", while that of the stick-relief structure 70 generated watermark shows the letter "A" in transmitted light as a bright, filled area.

Regarding 5 can on the support screen 80 also a variety of embroidery relief structures 82 be provided, for example, in the form of small star-shaped ornaments are, extending over the entire surface of the carrier screen 21 extend and thus produce a paper with a substantially nationwide watermark basic pattern in papermaking. It is understood that on such a carrier screen 80 additional watermark elements may be provided, for example in the form of further embossed relief structures or in the form of watermark inserts, which may be introduced by means of injection molding into a recess of the carrier screen, for example.

Instead of the individual ornaments 82 of the 5 Of course, endless watermark basic patterns can be provided everywhere, for example in the form of curved lines or guilloches. 6 shows by way of illustration a design in which on the surface of the support wire 80 with an embroidery thread in each case a multiplicity of stitches to curved wavy lines 84 strung together. The resulting paper then shows a nationwide basic watermark pattern of bright wavy lines.

The embroidered embroidery relief structures can also serve a further purpose in addition to their watermark-generating function. Regarding 7 For example, an endless embroidered embroidery relief structure 90 two subareas 92 . 94 connect a drainage screen together. In particular, two edge regions can be used 92 . 94 Thus, for example, the right and left edge region of a flat Entwässerungssiebs be connected to the production screen jacket of a cylindrical Rundsiebs. The stick-relief structure 90 thus serves on the one hand as a sieve seam and on the other hand at the same time as a watermark-generating element. By sewing the edge areas, plastic screens can be used for the first time as production screens for round screens. By that with the stick-relief structure 90 generated, visually attractive watermark can even be the connection area 96 the two edge areas 92 . 94 used for papermaking.

To prepare the connection of the edge areas 92 . 94 with the sieve seam / embossed relief structure 90 the threads of the plastic sieve are cut off and fused in the end regions of the edge regions, in particular by laser processing or by hot blades. For sewing, for example, an embroidery thread can be an ONYX 80 polyamide 6.6 Thread can be used. It is understood that other seam patterns than those in 7 shown pattern can be used for the connection, for example, a 4-stitch zig-zag pattern with a width of about 8 mm.

After sewing the seam becomes advantageous in the connection area 96 a plastic adhesive is applied on the inner side of the screen to prevent the threads from separating.

8th illustrates another way, a support screen 100 To provide by embroidering with a watermark element. In this variant, the watermark element is one with the carrier screen 100 Embroidery-related watermark insert 102 educated. The watermark insert 102 For example, it may be a metal plate or an injection molding insert that produces a desired watermark in the security paper. The watermark insert 102 is with ornamental and / or utility stitches with the embroidery thread 104 on the support screen 100 embroidered, whereby on the one hand a firm connection of the watermark insert 102 with the carrier screen 100 On the other hand, the connecting area formed by the stitches itself has a characteristic and visually attractive appearance.

In this way, the attachment of the watermark insert 102 with the help of the embroidery thread 104 itself a part of the security feature that can not easily be mimicked by other attachment methods such as gluing, welding or a spray technique.

LIST OF REFERENCE NUMBERS

10

bill

12

Ornament watermark

14

Endless watermark

16.17

lines

18

surfaces

20

Plastic dewatering

21

support screen

22, 24, 26

Weft systems

28

Warp binding thread system

30

Kunststoffsiebgewebe

40

Stick-relief structure

42

embroidery thread

44

curved lines

46

filled ornamental piece

50

Stick-relief structure

52

embroidery thread

54

straight lines

60

Stick-relief structure

62

embroidery thread

70

Stick-relief structure

72

Zigzag stitches

74

Outline of the letter

80

support screen

82

Stick-relief structure, star-shaped ornaments

84

Stick-relief structure, wavy lines

90

Stick-relief structure

92, 94

Subareas of a drainage screen

96

connecting area

100

support screen

102

Watermark use

104

embroidery thread

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 102006058513 A1 [0003, 0025]
• DE 102012018166 A1 [0034]

Claims (17)

Entwässerungssieb for the production of paper with watermarks, comprising a support screen and at least one arranged on the support wire watermark element with a relief in the form of a watermark to be generated, characterized in that the at least one watermark element by embroidered on the support screen embroidery relief structure or by a formed with the carrier wire by embroidering associated watermark insert. Drainage screen after Claim 1 , characterized in that the embroidered embossed relief structure comprises a sequence of stitches to straight or curved lines forming a raised, unfilled ornament or a raised, unfilled, continuous pattern. Drainage screen after Claim 1 or 2 , characterized in that the embroidered embossed relief structure comprises a plurality of closely spaced zig-zag stitches forming a raised, filled ornament or a raised, filled continuous pattern. Drainage screen after at least one of Claims 1 to 3 , characterized in that the embroidered embroidery relief structure connects two subregions of the carrier screen with one another, in particular connects two edge regions of the carrier screen to the production screen jacket of a round screen. Drainage screen after at least one of Claims 1 to 4 , characterized in that the embroidered embroidery relief structure is formed by an embroidery thread, in particular by a plastic multifilament thread. Drainage screen after at least one of Claims 1 to 5 , characterized in that a plurality of watermark elements is arranged on the support screen substantially nationwide, which produce a substantially nationwide basic watermark pattern in the paper in papermaking. Drainage screen after at least one of Claims 1 to 6 , characterized in that the dewatering screen includes embroidered markings such as control marks, track lines, register control marks or signature names. Drainage screen after at least one of Claims 1 to 7 , characterized in that the watermark insert connected to the carrier screen by stitching is formed by a metal plate or an injection-molded insert. Drainage screen after at least one of Claims 1 to 8th , characterized in that for generating webs for embedded window filaments a plurality of watermark elements are arranged spaced, which are formed by web-shaped embroidered embroidery relief structures or by web-shaped, by embroidering with the support screen connected web inserts. Drainage screen after at least one of Claims 1 to 9 , characterized in that the sieve fabric of the dewatering screen is a plastic sieve fabric. Drainage screen after at least one of Claims 1 to 10 , characterized in that the support wire in addition to the said watermark element in a partial region has a multi-level relief in the form of another, to be generated watermark, wherein the multi-level relief is formed by an injection-molded, perforated watermark insert. Drainage screen after Claim 11 , characterized in that the watermark insert is welded or glued to the carrier screen or is injected directly into the carrier screen. Drainage screen after at least one of Claims 1 to 12 , characterized in that the carrier screen comprises a single-layer plastic screen fabric with three superimposed weft thread systems and a warp binder thread system, with a first, coarse weft thread system on the underside machine side of the screen fabric, a second, fine weft thread system on the upper side of the paper screen fabric, a third weft thread system interposed between the first and second weft thread systems; and a fine warp binding thread system by which the three weft thread systems are interwoven with each other. Round screen for a paper machine or the like, with a production screen sheath, which passes through the dewatering screen according to one of Claims 1 to 13 is formed. Method for producing a dewatering screen for the production of watermarked paper, in which a carrier screen is provided and at least one watermark element with a relief in the form of a watermark to be produced is arranged on the carrier screen by embroidering a stick-relief structure on the carrier screen, or a watermark insert is connected by stitching to the carrier screen. Apparatus for producing a dewatering screen for the production of watermarked paper, comprising - a screen processing surface for receiving a dewatering screen, and - an embroidery head for embroidering a stick relief structure on the carrier screen and / or for connecting a watermark insert to the carrier screen by embroidering. Device after Claim 16 , further comprising - a laser cutter for creating recesses in the dewatering screen, - an injection molding tool for creating a watermark insert having a multi-stage injection molded relief in the recessed areas of the dewatering screen, and - a laser cutting device for creating dewatering perforations in the watermark insert.

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