DE102007011630A1 - Device for applying a fluid to a printing substrate - Google Patents

Abstract

For the treatment of the surface of a printing material, for. As a paper web, after the fixing module of an electrographic printing device at least one applicator element (AE) from an anilox roller (1) and one on the anilox roller (1) adjacent chambered doctor blade (2) is provided, which is a fluid, for. B. water, on the anilox roller (1) transmits, with which the anilox roller (1) wets the surface of the printing substrate (3).

Description

at The printing media production often becomes a printing device a more or less complex post-processing for a printing material, for. B. a paper web performed. In the process, the printing substrate formats used for printing are used produced the finished printed products. Post-processing machines can z. As tailor, stapler, moth, forklift.

In the case of electrographic printing, the toner images of the images to be printed produced in the printing device are fixed on the printing substrate and thus firmly bonded to the printing material. This method is known (s. WO 01/98840 A2 which is hereby incorporated into the disclosure) and will therefore not be further explained here. The fixation can be done in various ways, for. B. by roller fixation under pressure and heat or by radiation fixation. To the individual techniques becomes on the already mentioned WO 01/98840 A2 directed. When fixing the printing material is thus exposed to heat or pressure, with the result that its properties, such. As moisture and sliding properties are adversely affected. In particular, poor sliding properties of the printing material can lead to the fact that in the machines of the post-processing, the fixed toner layer is mechanically damaged or smeared. These damage can lead to accumulations of toner particles on exposed machine parts, which in turn can lead to unwanted toner applications on the substrate. Out WO 01/98840 A2 It is known to improve the post-processing of the printing material in that it is moistened so that the loss of moisture caused by the pressure is compensated again. As a means of moistening water is usually used.

• – Die Trocknung des Bedruckstoffes bei Wärmefixierung. Durch die Erwärmung des Bedruckstoffes durch die zur Fixierung notwendige Temperatur (> 120°C) wird die Feuchte des Bedruckstoffes so stark gesenkt, dass zum einen Probleme mit statischer Aufladung, zum anderen Formatänderungen durch Schrumpfung auftreten können.
• – Die Reibbeanspruchung des Bedruckstoffes in der Weiterverarbeitung und in Sortieranlagen.

For electrographic printing devices in particular two problems occur:

• - The drying of the substrate at heat fixing. Due to the heating of the substrate by the necessary temperature for fixing (> 120 ° C), the moisture content of the substrate is lowered so much that on the one hand problems with static charge, on the other format changes can occur due to shrinkage.
• - The friction of the substrate in further processing and sorting.

institutions with those z. B. by the pressure negatively influenced properties the substrate are corrected, z. B. humidifiers, Smoothing devices (glossing device) or cooling devices.

The smoothing device is usually placed after the fuser station in the printing device ( EP 0 758 766 B1 ) and has at least one smoothing roller, which is pressed against the substrate. With a cooling device, the printing material can be cooled before it reaches the machines of the post-processing.

In US 5,264,899 A a device for supplementing the moisture of a printing material is described. The moisture is fed to the substrate via porous rollers to prevent deformation of the substrate after fixation. The moisturizer consists of water, to which a wetting agent is added in order to achieve an even distribution of the water on the printing material. The wetting agent is designed so that the water is absorbed by the substrate. This is followed by the moistening device on the fixing station.

US 5,805,969 A describes a device with which a printing material after fixation can be improved in terms of its gloss (smoothing device). For this purpose, cooled rollers are provided, which are arranged at the output of the fuser and exert pressure on the heated in the fuser printing material. If the rollers are located away from the fuser, they must be heated, because then the heat of the substrate is not sufficient to produce by printing a gloss of the substrate.

Out US Pat. No. 6,259,887 B1 This results in a further moistening device for the printing substrate using water. The water is applied by means of an atomizer on the printing material. The moistening device is arranged at the output or input of the printing unit.

US Pat. No. 6,249,667 B1 describes a device for moistening a paper sheet with water. A transfer roller forms a nip with a counter roll through which the paper sheet passes. The transfer roller is moistened via a feed roller. The transfer roller is movable perpendicular to the paper sheet. It is under the spring force of a spring and can be moved away by means of a stepper motor and an eccentric of the counter-roller. The direction of rotation of the transfer roller is opposite to the feed direction of the paper sheet. Both sides of the paper sheet can be moistened. The moistening device is arranged after the fixing station.

The problem to be solved by the invention is a To provide apparatus and a method by which a printed Substrate optionally be acted upon with different fluids can.

This Problem is solved according to the features of the claim 1 and the claim 34 solved.

By Use of an application element from a grid element, for. B. one Anilox roller, in conjunction with a Kam merrakel can Fluids of different kinds for different purposes on the Substrate are applied.

further developments The invention will become apparent from the dependent claims.

The Grid element can identify a surface with wells and webs is provided, it may, for. B. be an anilox roller. Then can the supplied to the substrate amount of fluid through the shape of the wells can be adjusted.

Advantageous is, if arranged before and / or behind the applicator a Bedruckstoffführungselement is, by the substrate in the tensioned state on the grid element is guided along. The printing material guide element can thereby have a printing material, the over the substrate the order element pulls. Furthermore, the Bedruckstoffführungselement have an input arrangement for the printing material, the Supplies printing material to the application element.

If a drive for the grid element is provided, can this are operated so that a relative speed between the substrate and the peripheral speed of the raster element given is. The direction of movement of the raster element can be in the same direction or in the opposite direction to that of the printing material. Furthermore, the grid element be provided with a rotary actuator, with which the grid element be pivoted to the substrate or swung from this can.

Advantageous It is when the wrap around the grid element adjustable is because it affects the transition from fluid to the substrate can be.

to Supply of the application element with fluid can be the input and the Output of the chamber of the chambered doctor blade via a circulation circuit with each other be connected, in which a circulating pump is arranged, through which the fluid circulates in the circulation can be. The circulation cycle can over a Dosing branch with at least one storage container for a fluid are connected via the circulation circuit Fluid can be supplied. expedient it is when arranged in the metering branch a Nachdosierpumpe That is, the adjustable fluid supplements the consumption through promotes the application element in the circulation. Furthermore, in the circulation circuit, a cooling device be arranged to cool the fluid if necessary can, for. For example, if the order item is directly behind the Fixing module is arranged. The order item can also be direct be cooled, for. When it is inside a refrigeration unit is arranged. Furthermore, the grid element can be cooled from the inside become.

Of the in the chamber of the chambered scraper existing pressure can through the circulation pump However, it is also possible to pressure through a container located above the applicator to be pumped into the fluid.

If Reservoir provided for various fluids are each connected via a valve with the Dosierzweig are, can the circulation circuit selectable different types of fluids are supplied.

If the circulation circuit at its highest point a venting arrangement with a riser, the circulation circuit can be vented. In the venting arrangement may be a level sensor be arranged, with a level signal, the additional dosage of fluid in the circulation circuit controls. In addition, that can Riser be connected to an overflow branch, over the excess fluid to a reservoir for waste can be supplied. An overflow but can also be placed directly on the chamber of the chambered doctor blade, then via a circulation pump with the chamber the chambered doctor is connected.

Below the applicator element may be arranged a drip tray with the waste container is connected and that of the applicator element dripping fluid absorbs.

If on each side of the printing substrate in each case an application element is arranged from a grid element and a chambered doctor blade, each can Side of the printing material to be acted upon with a fluid, for. B. also with different fluid.

The Device can be controlled so that the application elements be turned on when you turn on the printing device and be switched off when switching off the printing device. Farther can the order elements when switching off the substrate be lowered, be swung again when switching.

• – Mit dem Auftragselement kann der Bedruckstoff innerhalb oder außerhalb des Druckgerätes nach dem Fixierprozess mit einem Fluid beaufschlagt werden.
• – Mit dem Auftragselement aus Rasterwalze und Kammerrakel kann der Auftrag des Fluids auf den Bedruckstoff gezielt dosiert werden. Es können unterschiedlichste Arten und Breiten des Bedruckstoffes verarbeitet werden.
• – Das Auftragselement aus Rasterwalze und Kammerrakel kann unterschiedlichte Arten von Fluids auf den Bedruckstoff aufbringen, z. B. handelsübliche Dispersionen und Emulsionen, Wasser, UV vernetzbare Lacke, Wasser mit Netzmitteln usw.. Somit kann z. B. durch das Auftragselement der Bedruckstoff befeuchtet werden, oder er kann mit einem Schutzlack oder einer Schutzemulsion überzogen werden, um gegen mechanische Beschädigung geschützt zu sein. Erforderlich ist lediglich, dass das Auftragselement mit einem Vorratsbehälter mit dem gewünschten Fluid verbunden wird.
• – Die Auftragsmenge des Fluids auf den Bedruckstoff kann auf verschiedene Weise eingestellt werden: 1. Durch Einstellung des Umschlingungswinkels; damit wird die Berührfläche des Bedruckstoffes auf der Rasterwalze festgelegt. 2. Durch Einstellung der Relativgeschwindigkeit zwischen Rasterwalze und Bedruckstoff; die Umfangsgeschwindigkeit der Rasterwalze kann dabei von der Geschwindigkeit des Bedruckstoffes abweichen. 3. Durch Einstellung des Schöpfvolumens der Rasterwalze; dieses kann durch die Form der Näpfchen (Linienraster, deren Tiefe, der Steganteil) der Rasterwalze beeinflusst werden.
• – Bei Wechsel der Art des verarbeiteten Fluids kann die Vorrichtung leicht gereinigt werden, z. B. zunächst durch Entleerung des Kreislaufes vom bisher verwendeten Fluid mit anschließendem Spülen mit Wasser. Das gleiche Vorgehen kann durchgeführt werden, wenn der Betrieb unterbrochen werden soll.
• – Wenn zwei Auftragselemente vorgesehen werden, kann die Oberseite und Unterseite des Bedruckstoffes unterschiedlich behandelt werden, z. B. mit verschiedenen Fluiden.

In summary, the device according to the invention has the following advantageous properties, wherein an anilox roller is used as raster element:

• - With the application element, the printing material be subjected within the printing device after the fixing process with a fluid.
• - With the application element of anilox roller and chamber doctor blade, the order of the fluid can be selectively metered onto the substrate. Various types and widths of the substrate can be processed.
• - The application element of anilox roller and chamber doctor blade can apply different types of fluids to the substrate, eg. As commercially available dispersions and emulsions, water, UV crosslinkable paints, water with wetting agents, etc. Thus, z. B. be moistened by the applicator of the substrate, or it can be coated with a protective lacquer or a protective emulsion to be protected against mechanical damage. All that is required is that the application element is connected to a reservoir with the desired fluid.
• - The application rate of the fluid to the substrate can be adjusted in several ways: 1. By adjusting the wrap angle; Thus, the contact surface of the printing material is set on the anilox roller. 2. By adjusting the relative speed between anilox roller and substrate; The peripheral speed of the anilox roller can deviate from the speed of the printing material. 3. By adjusting the scoop volume of the anilox roller; this can be influenced by the shape of the cups (line grid, their depth, the web portion) of the anilox roller.
• - When changing the type of processed fluid, the device can be easily cleaned, z. B. first by emptying the circuit from the previously used fluid with subsequent rinsing with water. The same procedure can be used if the operation is to be interrupted.
• - If two application elements are provided, the top and bottom of the substrate can be treated differently, eg. B. with different fluids.

• – Leichte Integration in ein bestehendes Druckgerät;
• – Kombination von Schutzwirkung, Veredelung und Rückbefeuchtung in einer Vorrichtung ist durch Verwendung von wässerigen Emulsionen, Dispersionen, UV-vernetzbaren Lacken, Wasser mit Netzmittel möglich;
• – Gleichmäßige und zeitlich unbeschränkt andauernde Schutzbeschichtung des Bedruckstoffes mit speziellen Schutzlacken;
• – Verbesserung der Verfügbarkeit von Nachverarbeitungssystemen des Bedruckstoffes durch Reduzierung der Aufladung des Bedruckstoffes;
• – Vermeidung von Verkratzen und Verschmieren bei Weiterverarbeitung und Postversand;
• – Variation des Glanzes (matt, hochglanz) über die gesamte Oberfläche des Bedruckstoffes unabhängig vom Tonerauftrag, homogener Glanz auch bei unbedruckten Stellen des Bedruckstoffes;
• – Sofortige Weiterverarbeitung des Bedruckstoffes, da dieser gekühlt, getrocknet und/oder geschützt ist.

As a result, these properties of the device according to the invention lead to the following advantages:

• - Easy integration into an existing printing device;
• Combination of protective effect, refinement and rewetting in one device is possible by using aqueous emulsions, dispersions, UV-curable lacquers, water with wetting agent;
• - Uniform and uninterrupted protective coating of the substrate with special protective lacquers;
• - Improving the availability of post-processing of the substrate by reducing the charge of the substrate;
• - avoiding scratching and smudging during further processing and mailing;
• - Variation of the gloss (matt, high gloss) over the entire surface of the substrate regardless of the toner application, homogeneous gloss even in unprinted areas of the substrate;
• - Immediate further processing of the substrate, as it is cooled, dried and / or protected.

At Hand of an embodiment, shown in the figures is, the invention will be further explained. Show it:

1 a representation with two application elements;

2 a representation of the arrangement of 1 within a refrigeration unit;

3 a representation of the device according to the invention with two application elements.

In 1 two order elements AE1, AE2 are shown, each one grid element 1 and a chambered scraper 2 exhibit. Between the grid elements 1 the order elements AE becomes the printing material 3 , z. B. a paper web, passed.

Each application element AE has in the exemplary embodiment as a grid element an anilox roller 1 on, on each of the chambered doctor blade 2 is applied. Instead of an anilox roller and a grid band can be provided. The explanation below is based on an anilox roller. The anilox roller 1 can be driven by a motor (not shown), eg. B. in the direction of the arrow PF or in the opposite direction. The chambered doctor 2 has a chamber 4 on that to the anilox roller 1 is open, is closed on the side and to the anilox roller 1 a metering blade 5 and a squeegee 6 having. The construction of the chambered doctor blade 2 arises z. B. off WO 2005/013013 A3 , which is hereby incorporated into the disclosure. In the chambered doctor 2 there is the fluid on the anilox roller 1 should be applied. The amount of fluid on the anilox roller 1 is applied by the metering blade 5 influenced.

In 1 two application elements AE1 and AE2 are provided, of which the first application element AE1 above the printing material 3 is arranged, the second application element AE2 below the printing material 3 , Below the order elements AE can be a drip tray ( 30 . 31 . 2 ) are arranged to receive the dripping of the applicator elements AE fluid.

On the one side of the application elements AE can be a printing material 7 , z. B. from a driven roller 8th and from a pinch roller 9 , to be arranged, which the printing material 3 between the application elements AE1, AE2 pulls, on the other side of the application elements AE, a substrate input device 10 , z. B. from guide rollers 11 , for the substrate 3 be provided. If the device is arranged in a printing device, the existing drive arrangement and input arrangement for the transport of the printing material can there 3 to be used with.

By the arrangement of the substrate input device 10 and the printing material removal 7 and by the arrangement and position of the anilox rollers 1 can the wrap angle of the substrate 3 around the anilox rolls 1 be set. For this purpose, the respective application element AE by a pivot drive (in 1 not shown) to the substrate 3 swung or swung from this. The application elements AE can also offset from each other on the substrate 3 concerns (accordingly 1 and 2 ).

2 shows the arrangement of the device within cooling units KE. This arrangement is particularly advantageous if the device is arranged directly behind the fixing module. Then the required anyway cooling unit for cooling the substrate 3 also be used for cooling the device. Out 2 is also the structure of the application element AE from anilox roller 1 and chambered scraper 2 more clearly recognizable. The chambered doctor 2 has a chamber 4 which is partially filled with fluid. The chamber 4 is with the metering blade 5 and closing squeegee 6 to the anilox roller 1 completed. Furthermore, a part of the pivot drive can be seen, namely a cam 35 to which the application element is applied and the z. B. by a stepper motor (not shown) can be moved.

3 shows a schematic representation of the fluid supply system for the chamber doctor blades 2 , The supply system has a circulation circuit 12 on. The circulation circuit 12 connects the outlet of the chambered doctor 2 for the fluid with the inlet of the chambered doctor blade 2 for the fluid and has an outlet branch 13 that with the exit of the chambered scraper 2 is connected and an input branch 14 , with the entrance of the chambered scraper 2 is connected. In the output branch 13 is in each case a circulating pump 16 inserted the fluid from the outlet to the inlet of the chambered doctor blade 2 inflated. If necessary, can be adjacent to the circulation pumps 16 one cooling unit each 17 in the output branch 13 be inserted, this is advantageous if the substrate 3 z. B. after fixing the toner images is still too warm. For cooling, a cooling unit KE (FIG. 2 ) or the anilox roller 1 can be cooled from the inside. The input branch 14 is on the one hand with the output branch 13 connected, on the other hand, he is on a Dosierzweig 15 connected, in which a Nachdosierpumpe 18 and solenoid valves 19 to 21 are arranged over the reservoir 23 to 25 for different types of fluids with the Dosierzweig 15 can be connected. In 2 is z. B. a reservoir 24 for water, a storage container 23 for paint and a storage container 25 intended for waste. The reservoir 23 to 25 can through level sensors 22 be monitored with respect to the level of the fluids.

In the entrance branch 14 is a venting arrangement 26 with a riser 27 for venting the circulation 12 intended. This is at the highest point of the recirculation cycle 12 arranged. In the riser 27 is an additional level sensor 28 arranged, with which the level in the riser 27 is monitored and outputs a fill level corresponding to the level signal. Furthermore, the upper portion of the riser 27 over an overflow branch 29 and a return branch 30 with the waste bin 25 connected. Over the overflow branch 29 will excess fluid in the riser 27 in the waste bin 25 derived.

Furthermore, below the chamber doctor blades 2 one drip tray each 31 . 32 provided to receive the dripping of the applicator elements AE fluid and the return branch 30 the waste bin 25 forward. To check the temperature of the substrate 3 supplied fluid can in each chambered doctor blade 2 a temperature sensor 33 . 34 can be arranged, the at high temperature of the fluid z. B. the activation of the cooling units 17 cause.

In operation, the chambered doctor blades 2 from one of the storage tanks 23 to 25 over the dosing branch 15 and the input branch 14 supplied with the selected fluid. This is one of the reservoir 23 to 25 through the associated solenoid valve 19 to 21 with the dosing branch 15 connected, in 2 z. B. the paint reservoir 23 , The replenishment pump 18 is turned on and the fluid to the entrance of the chambered doctor blade 2 fed. Should be too much fluid of the chambered doctor 2 be fed, this is in the riser 27 through the level sensor 28 determined and the Nachdosierpumpe 18 controlled accordingly by the level signal. The fluid enters the chamber 4 the chambered doctor 2 and gets from there through the dosing blade 5 on the anilox roller 1 transferred into their wells. Should be too a lot of fluid in the chamber 4 the chambered doctor 2 The abundance will pass through the exit of the chamber 4 in the output branch 13 passed and from there via the circulation pump 16 again in the input branch 14 , Should the temperature sensors 33 or 34 determine that the fluid is too warm, the associated cooling units 17 be switched on and the fluid to be cooled.

A replenishment pump 18 thus promotes the fluid from the selected reservoir 23 to 25 after, while the circulation pump 16 in the circulation circuit 12 constantly circulating fluid amount. The reservoir 23 to 25 are not part of the recirculation cycle 12 , The reservoir 23 to 25 be with the help of controlled solenoid valves 19 to 21 opened and closed. This can be done without interrupting the printing process in the circulation 12 be conveyed fluid.

If two application elements AE1, AE2 are used, the top and bottom of the substrate can be used 3 each acted upon by different fluids. Then, however, two separate recirculation cycles are required.

When the printer device stops, the anilox rollers become 1 while decelerating the speed of the substrate 3 swung off, leaving no wet streaks on the substrate 3 remain. Furthermore, when switching on the printing device is a line-exact placement of the anilox rollers 1 on the substrate 3 during acceleration of the printing material 3 adjustable to operating speed. This is achieved in that the application elements AE are controlled by the control of the printing device and continue with the movement of the printing material 3 be synchronized.

If a change of fluid is made, the supply system for the fluid must be rinsed, z. B. with water. This is the circulation circuit 12 with the help of the dosing pump 18 emptied and then filled with water. The diluted with water fluid residues are in the waste reservoir 25 pumped out.

With the application elements AE, all commercially available dispersions and emulsions can be processed, as well as water, UV-crosslinkable lacquers, water with wetting agents, etc. Depending on the type of fluid and amount of fluid, the printing material can 3 be rewetted, a protective lacquer or a protective emulsion against damage caused by mechanical stress or the gloss of the printing material to be changed.

The admission of the printing material 3 with fluid can be done within a printing device behind the fuser directly or outside the printing device. Due to the use of the application elements AE according to the invention, all printable substrate types and widths can be processed. For use in a warm fixing environment, the fluid may pass through the cooling units 17 be cooled. For example, the printing material 3 still have a temperature of about 150 ° C behind the fuser; through the cooling units 17 contained heat exchanger and circulating pumps 16 The fluid can be cooled and thus also the anilox rollers 1 , A still warm printing material 3 however, has the advantage that the applied fluid dries faster, this allows a short drying distance even at higher process speeds.

• – Durch Einstellung des Umschlingungswinkels um die Rasterwalzen 1 z. B. durch den Schwenkantrieb; damit wird die Berührfläche des Bedruckstoffes 3 mit der Rasterwalze 1 definiert.
• – Durch Einstellung der Relativgeschwindigkeit zwischen Rasterwalze 1 und Bedruckstoff 3; dabei kann die Umfangsgeschwindigkeit der Rasterwalze 1 von der Geschwindigkeit des Bedruckstoffes 3 abweichen.
• – Durch Einstellung des Schöpfvolumens der Rasterwalzen durch Definition der Näpfchen, z. B. deren Form, Linienraster, Tiefe, Steganteil usw..

The anilox rolls 1 have direct contact with the substrate during operation 3 , They can be arranged so that there is no contact surface between them. The anilox rollers can do this 1 each driven by a motor, for. B. in the direction of movement of the printing material 3 , In addition, the anilox rollers 1 with a rotary actuator accurate to the position of the substrate 3 be swung while the wrap angle of the substrate 3 around the anilox rolls 1 be set. The anilox rolls 1 transfer part of the well volume to the substrate 3 , z. B. ½ of the well volume. The amount of fluid applied to the substrate 3 can in the following manner by a controller, for. As the printer control, are influenced:

• - By adjusting the wrap angle around the anilox rollers 1 z. B. by the rotary actuator; This is the contact surface of the substrate 3 with the anilox roller 1 Are defined.
• - By adjusting the relative speed between the anilox roller 1 and printing material 3 ; while the peripheral speed of the anilox roller 1 on the speed of the substrate 3 differ.
• - By adjusting the scoop volume of the anilox rollers by defining the wells, z. B. their shape, line grid, depth, bridge share, etc ..

Should Evaporating on cool surfaces of the device Particles of the fluid knock down, because there fell below the dew point can be remedy with high-boiling fluids combined with the suction of the steam can be achieved. A combination with a forced one Deposition of the vapor z. B. on a cooled condensation trap with Condensate return is also possible.

AE

applicator

PF

arrow

KE

cooling unit

1

anilox roller

2

chambered doctor blade

3

substrate

4

chamber the chambered doctor

5

metering blade

6

closing doctor

7

Bedruckstoffabzug

8th

drive roller

9

pinch

10

input device

11

guide roller

12

circulating

13

output branch

14

input branch

15

Dosierzweig

16

circulating pump

17

cooling unit

18

Nachdosierpumpe

19

magnetic valve

20

magnetic valve

21

magnetic valve

22

level sensor

23

reservoir

24

reservoir

25

reservoir

26

The vent assembly

27

riser

28

level sensor

29

Overflow branch

30

Return branch

31

drip tray

32

drip tray

33

temperature sensor

34

temperature sensor

35

cam

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 01/98840 A2 [0002, 0002, 0002]
• EP 0758766 B1 [0005]
• - US 5264899 A [0006]
• US 5805969 A [0007]
• - US 6259887 B1 [0008]
• - US 6249667 B1 [0009]
• WO 2005/013013 A3 [0032]

Claims (41)

Device for applying a fluid to a printing substrate, - in which an application element (AE) consists of a raster element ( 1 ) and one on the grid element ( 1 ) adjoining chamber doctor blade ( 2 ) is provided, which the fluid on the grid element ( 1 ) transmits, - in which the grid element ( 1 ) adjacent to the grid element ( 1 ) past moving substrate ( 3 ) is arranged such that the raster element ( 1 ) the surface of the substrate ( 3 ) wets with the fluid. Device according to Claim 1, in which the grid element ( 1 ) on the substrate ( 3 ) is present. Apparatus according to claim 1 or 2, wherein the grid element ( 1 ) identifies a surface which is provided with wells and webs. Device according to Claim 3, in which the substrate ( 3 ) supplied amount of fluid through the shape of the wells is adjustable. Apparatus according to claim 1, 2, 3 or 4, wherein in front of and behind the applicator element (AE) a Bedruckstoffführungselement ( 7 . 10 ) is arranged, through which the printing substrate ( 3 ) in the tensioned state on the grid element ( 1 ) is guided along. Apparatus according to claim 5, in which the printing material guiding element has a printing material discharge ( 7 ), which the substrate ( 3 ) drives. Device according to one of the preceding claims, in which a drive for the grid element ( 1 ) is provided which the grid element ( 1 ) in the same direction or in opposite directions to the movement of the printing material ( 3 ) drives. Apparatus according to claim 7, in which the drive for the printing material ( 3 ) and the drive for the grid element ( 1 ) is set such that a relative speed between the speed of the printing material ( 3 ) and the peripheral speed of the raster element ( 1 ) consists. Device according to one of claims 5 to 8, in which the wrap around the grid element adjustable is. Device according to Claim 9, in which the grid element ( 1 ) is connected to a pivot drive, with which the grid element ( 1 ) to the substrate ( 3 ) can be swiveled or swung away from this. Device according to one of the preceding claims, in which the inlet and the outlet of the chambered doctor blade ( 2 ) via an output branch ( 13 ) and input branch ( 14 ) having circulation circuit ( 12 ) is interconnected. Apparatus according to claim 11, wherein in the output branch ( 13 ) a circulation pump ( 16 ) is arranged through which the fluid in the circulation ( 12 ) is revolvable. Apparatus according to claim 11 or 12, wherein in the output branch a cooling unit ( 17 ) is arranged. Device according to claim 11, 12 or 13, in which the input branch ( 14 ) at its highest point a venting arrangement ( 26 ) having. Device according to Claim 14, in which the ventilation arrangement ( 26 ) a riser ( 27 ), to which an overflow branch ( 29 ) is connected, via which an abundance of fluid is derived. Apparatus according to claim 15, wherein in the riser ( 27 ) a level sensor ( 28 ) is arranged, the level of fluid in the riser ( 27 ) and outputs a level signal. Device according to one of Claims 11 to 16, in which the input branch ( 14 ) via a metering branch ( 15 ) with at least one storage container ( 23 . 24 . 25 ) is connected to a fluid via which the input branch ( 14 ) Fluid can be supplied. Device according to claim 17, in which in the dosing branch ( 15 ) a Nachdosierpumpe ( 18 ) is arranged, the adjustable fluid to supplement the consumption by the applicator element (AE) in the input branch ( 14 ) promotes. Device according to Claim 18, in which the replenishment pump ( 18 ) is controlled by the level signal. Apparatus according to claim 17, 18 or 19, wherein the storage container ( 23 . 24 . 25 ) are provided for different fluids, each via a solenoid valve ( 19 . 20 21 ) with the dosing branch ( 15 ) are connectable. Device according to Claim 20, in which a waste container ( 25 ) provided to a return branch ( 30 ) connected to the overflow branch ( 29 ) connected is. Apparatus according to claim 21, wherein below the application element (AE) a drip tray ( 31 . 32 ) arranged with the waste storage container ( 25 ) via the return branch ( 30 ) connected is. Device according to one of claims 20 to 22, wherein the storage container ( 23 . 24 . 25 ) are provided for paint, water and / or waste. Device according to any one of the preceding claims, in which at the chamber ( 4 ) of the chambered doctor blade ( 2 ) an overflow is provided and the amount of fluid discharged via the overflow to the chambered doctor blade ( 2 ) is returned. Device according to one of the preceding claims, in which the application element (AE) within a cooling unit (KE) is arranged. Device according to one of the preceding claims, in which on both sides of the printing substrate ( 3 ) in each case an order element (AE1, AE2) from a raster element ( 1 ) and a chambered doctor blade ( 2 ) is arranged. Apparatus according to claim 26, wherein the application elements (AE) offset from one another along the substrate ( 3 ) are arranged. Apparatus according to claim 26 or 27, wherein each applicator element (AE) each have their own recirculation circuit ( 12 ) with circulating pumps ( 16 ) and cooling units ( 17 ), a separate dosing branch ( 15 ) with replenishment pump ( 18 ) and storage containers. Device according to one of the preceding claims, in which the printing substrate ( 3 ) is a paper web. Device according to one of the preceding claims, in which the grid element ( 1 ) is an anilox roller with wells and webs. Device according to Claim 30, in which the anilox roller ( 1 ) is cooled from the inside. Electrographic printing device with a printing module and a fixing module, wherein a device according to one of the preceding Claims is arranged at the exit. Electrographic printing device with a printing module and a fixing module, wherein a device according to any one of claims 1 to 31 after the fixing module within the printing device is arranged. Method for applying a fluid to a Substrate in an electrographic printing device, at when switching on the printing device, the device after one of claims 1 to 31 is turned on and at Switching off the pressure device is switched off again. The method of claim 34, wherein the operation of the device with the movement of the printing substrate ( 3 ) is synchronized. The method of claim 34 or 35, wherein the application amount of fluid to the substrate ( 3 ) when using an anilox roller ( 1 ) as a raster element by the shape of the surface of the anilox roller ( 1 ) is set. Process according to one of Claims 34 to 36, in which the supply of fluid to the printing stock ( 3 ) by the wrap angle of the substrates ( 3 ) around the anilox roller ( 1 ) is set. Process according to one of Claims 34 to 37, in which the supply of fluid to the printing stock ( 3 ) by selecting the relative speed between the speed of the printing material ( 3 ) and the peripheral speed of the anilox roller ( 1 ) is set. Method according to one of claims 34 to 38, in which before the change to another fluid the previously used Fluid is pumped out of the supply system and the supply system is cleaned with water. Method according to one of claims 34 to 39, wherein the temperature in the chamber ( 4 ) of the chambered doctor blade ( 2 ) with a temperature sensor ( 33 . 34 ) and the cooling unit ( 17 ) is controlled in dependence of the measurement signal so that one for the drying of the fluid on the printing substrate ( 3 ) Advantageous residual heat of the fluid is maintained. Method according to one of Claims 34 to 40, in which a high-boiling fluid is used to remove a precipitate of evaporating fluid in the device and / or the fluid vapor is suctioned off or the fluid vapor is deposited in a condensation trap and the condensate is introduced into the waste reservoir ( 25 ) is returned.