EP0821102B1 - Apparatus for applying directly a fluid or pasty material onto a moving web, especially of paper or paperboard - Google Patents

Description

The present invention relates to an applicator for direct application of a liquid or pasty medium to a running material web, in particular made of paper or cardboard.
Furthermore, the invention relates to a method for the controlled setting of a desired transverse profile of a liquid or pasty medium applied to a running material web by means of such an applicator.

Commissioned works are part of so-called Coating lines used to make a running web of material for example made of paper, cardboard or a textile material exists, on one or both sides with one or more Layers of liquid or pasty coating media too Mistake. The coating media is for example about color, starch, impregnation liquid or like.

In so-called direct application, the liquid or pasty medium from an application device directly onto the Surface of the running web of material applied during the application on a rotating counter surface, for example an endless belt or a counter roller, is supported. With such orders, the Application device usually as a pre-metering device designed the liquid or pasty medium initially orders in excess order quantity. The The pre-metering device is in the direction of travel of the material web expediently a final metering device (also Fine dosing device, finished dosing device or Equalization device) connected downstream, which previously excess applied by the pre-metering device Medium with the help of a running material web pressed, consistently over essentially the entire Web width extending doctor element, such as one Doctor blade, a doctor blade or the like, doctored and so the desired final order quantity on the Material web achieved. The final dispenser is common in a variety of cross-directional Zones divided into material web (see e.g. DE-A-4 203 398), each zone normally an actuator is assigned so that by a different influence of the Contact pressure of the doctor element by means of a respective one Actuator a desired cross profile of the applied Medium is reached. The actuators are mostly operated remotely or by hand, the Control of the actuators based on measured values from the Cross profile of the applied liquid or pasty medium is carried out via a control loop.

With newer custom works one has also gone over to the predosing device already has a certain adjustability of the cross profile of the applied medium. To a pre-metering device is used for this purpose, for example uses a metering gap designed as a free jet nozzle, that between an inlet-side and outlet-side lip formed and in itself transverse to the direction of the web extending zones is divided, with each zone in generally an actuator is assigned so that the lip on the inlet side or the lip on the outlet side the length of the application is uniform or in zones different in their distance from the opposite lip is adjustable. It is also possible to use both lips to adjust at the same time. The actuators mentioned are mostly remotely controlled or alternatively by hand press, the actuation of the actuators based on measured values of the cross profile of the applied liquid or pasty medium is carried out via a control loop. Such an application is for example from DE-A-4432177 by the applicant and under the trade name "Jet Flow F" known.

The preliminary and final metering devices explained above are usually used in two common configurations, and on the one hand in an arrangement in which a so-called "spatially separated" preliminary and final dosing takes place and for another in an arrangement in which the preliminary and final dosing "not spatially separated" is executed. In the first-mentioned arrangement, i.e. with the spatially separate and final dosing, the pre-dosing device is located a first counter roller and the final metering device on one second counter roll in the direction of the web seen after the first roller is connected. A commissioned work with such a configuration is for example from the DE-A-3715307 known. With the "not spatially separate" The arrangement, on the other hand, is a preliminary and final metering device assigned common counter roller.

Furthermore is from the additional application DE-A-196 05 183.5 (filing date: 8.2.96; filing date: 14.8.97) of the applicant one with one a process for carrying out a pre-metering and end-metering device Regulation of the coat weight cross profile one directly on one running material web, in particular made of paper or cardboard, applied liquid or pasty medium known, wherein the method is characterized in that about Actuators both a correction of the Predosing device applied coating weight as well a correction of that achieved with the final metering device Dash weight is made, the respective Corrections to a desired overall correction of the Complete the cross-section weight.

This solution only allows using the final dispenser relatively small local corrections of the cross section having to perform, which means a much smaller, locally different wear of the End metering doctor element (especially when using a Doctor blade as a doctor element) occurs and the service life of the Doctor element can be increased significantly.

Since, as previously described, this is the case with this method desired cross profile through precisely coordinated Correction settings of pre and final dosing device is achieved, however, are high demands on the constructive design of the commission.

The present invention is therefore based on the object to create a suitable commissioned work with through a coordinated cross-profile setting from pre and final dosing device to simple and effective Way an exact setting of a desired one final cross profile and thus a high quality End product is achieved. Another job is one suitable method for the regulated setting of a desired cross profile of one by means of such Applicator on a running material web, in particular from Paper or cardboard, applied liquid or pasty To create medium.

The first-mentioned task is solved by a Commissioned work according to the invention with the features of Claim 1 and another commissioned work according to the invention with the Features of claim 2.

The inventors of the present application have recognized that the size ratio of the respectively selected zone widths of the pre-metering device and the final metering device has a special influence on the achievable quality of the final cross profile of the applied liquid or pasty medium produced by the coordinated cross-profile setting of the pre-metering and final metering devices. Accordingly, in the application unit according to the invention, the respective zone widths of the zones of the pre-metering device and the final metering device which extend transversely to the running direction of the material web are essentially identical. In the second application work according to the invention, the zones are different from one another.
For the purposes of the invention, a zone is to be understood as a region of the pre-dosing or end-dosing device which is defined and extends transversely to the direction of travel of the material web and which is equipped with one or more actuators arranged in a predetermined arrangement pattern and which is relative to others by means of these actuators similarly designed areas for setting a specific transverse profile based on the web width of the material web is locally adjustable. If only a single actuator is assigned to a zone, a uniform cross-profile adjustment is achieved within a zone area (for the purpose of profiling zone by zone in relation to the longitudinal extent of the preliminary or final metering device), whereas if several actuators assigned to a zone are provided, a locally varying one is also achieved Adjustment within the zone course itself is possible.

When using a pre-metering device with an as Free jet nozzle formed metering gap between a inlet-side and outlet-side lip formed and in itself Zones extending transversely to the direction of travel of the material web is divided, for example, a physical separation between the individual zones, just like one segmented or comb-like doctor blade bed divided into zones Final metering. Act the actuators one Final dosing device, however, directly on a corresponding designed, zone-wise adjustable doctor element, see above is used here in order to avoid the formation of grooves on the doctored order no physical separation of the zones available. The zone-by-zone adjustment is then carried out by a elastic deformation of wall sections of the Doctor element. The latter variant is of course also adequate conceivable with a pre-metering device.

The application work according to the invention allows special proportions of the respective zone widths of the Pre and final dosing device and the achievable thereby targeted overlay of the respective locally varying Cross-section corrections of these facilities to one Total correction in a simple and effective way high profiling potential and an exact setting and Controllability of a desired final cross section and thus a high quality end product. moreover enables the solution according to the invention with which Final dosing device only relatively small local Having to make corrections to the cross section, causing a significantly less, locally different wear of the final metering doctor element (especially when used a doctor blade as a doctor element) and the Service life of the doctor element can be increased significantly. Finally, the excess amount of liquid or pasty application medium reducible.

According to a further design feature of the Applicator according to the invention, it has been found for the Proven quality of the achievable cross profile that the zones of the pre-metering device and the zones of the End metering device seen in the direction of travel of the material web lie directly one behind the other.

Depending on certain parameters, such as each selected order medium, the type of material web, the Wear of the doctor element and the like more and the related characteristic cross-profile deviations, is however also another variant according to the invention can be used advantageously, which is designed so that the zones the pre-metering device and the zones of the End metering device seen in the direction of travel of the material web by a predetermined amount in the width direction of the Material web are offset from each other.

In this context, it has proven particularly useful that the zones of the pre-metering device and the zones of the final metering device, viewed in the running direction of the material web, are offset from one another by such a predetermined amount in the width direction of the material web. In the first invention (with identical zones), the amount corresponds to half of the identical zone widths of the preliminary and final metering device.
In the second invention with zone widths shifted from one another, the amount corresponds to half of the respectively smaller of the zone widths which differ from one another of the preliminary and final metering device.

In another preferred embodiment of the application unit according to the invention, the zones of the pre-metering device comprise at least two zone types, the zone widths of which differ from one another.
It is also provided according to the invention that the zones of the final metering device comprise at least two zone types, the zone widths of which differ from one another. The two aforementioned variants can of course also be combined.

According to another advantageous embodiment of the Invention is provided that the mutual Distance of the adjustment points of the zones of the Actuators associated with the pre-metering device Division and by the mutual distance of the Adjustment points of the zones of the final dosing device assigned actuators formed division are identical. Is a respective zone of the preliminary and final dosing device only assigned to a single actuator, the corresponds to said identical division of the aforementioned identical Zone width of the preliminary and final dosing device. Are one or several zones of these facilities, however, several Actuators assigned, so the previously described identical division from the identical zone widths of the pre and final metering device may be different. Under a Adjustment point of an actuator is in the sense of the invention to understand the usually punctual area in which the Actuator attacks on the preliminary or final metering device.

The respective adjustment points are preferably located Predosing device and the final metering device in Direction of travel of the material web seen in direct succession.

However, it is also for certain applications according to the invention advantageous that the respective adjustment points of the Predosing device and the final metering device in Direction of the material web seen around a predetermined Amount in the width direction of the material web against each other are offset.

In this context, especially with such Variant according to the invention achievable positive results is characterized in that the respective adjustment points the pre-metering device and the final metering device in Direction of the material web seen around a predetermined Amount in the width direction of the material web against each other are offset, half of each identical Divisions corresponds.

Another preferred embodiment of the invention provides before that the pre-metering device and Final metering device have identical zone widths, however in contrast to one previously explained Embodiment by the mutual distance of the Adjustment points of the zones of the pre-metering device assigned actuators formed division and by the mutual distance of the adjustment points of the zones of the Actuators associated with the final metering device Division are different from each other. This measure too contributes to production depending on various parameters a desired final cross profile of the applied liquid or pasty medium.

Due to the mutual spacing, this is preferably Adjustment points of the zones of the pre-metering device assigned actuators formed division an integer multiple of that of the mutual Distance of the adjustment points of the zones of the Actuators associated with the final metering device Division, or vice versa.

According to an additional advantageous design feature The invention provides that the Material web seen and related to the width direction of the Material web an integral multiple of each smaller division of the aforementioned divisions is congruent with the larger division.

Depending on the application, it has also proven to be cheap emphasized that when viewed in the running direction () the Material web and related to the width direction of the Material web an integral multiple of each smaller division not congruent with each larger division is.

According to another embodiment variant according to the invention, which are also beneficial for certain applications can be used, form the zones of the pre-metering device assigned actuators by their respective mutual Distance of their adjustment points at least two divisions are different from each other. In the invention provided identical zone widths of pre and Final dosing device can adjust the adjustment points of the respective Actuators of the pre-metering device within a Zone area in a certain uniform or irregular arrangement pattern can be arranged, the respective distance between at least two neighboring ones Adjustment points or actuators are not the same is.

Likewise, it is also possible in the sense of the invention that assigned to the zones of the final metering device Actuators by their respective mutual distance Adjustment points form at least two divisions that are different from each other.

For targeted influencing of the cross profile in edge areas the running web of material is a preferred one Embodiment of the invention designed such that the Predosing device at least one laterally over one Edge zone extending beyond the edge of the running material web comprises, and / or the final metering device at least one sideways over an edge of the running material web extends beyond the peripheral zone. With one Edge zone can also be a within the meaning of the invention partially act in the zone width zone, which protrudes laterally over the edge of the material web and on this way forms the corresponding edge zone.

After an additional invention The design feature is the zone width of the edge zone Predosing device preferably different from that Zone width of the remaining zones of the pre-metering device, and / or the zone width of the edge zone of the Final dosing device different from the zone width of the remaining zones of the final metering device.

In this context it should be noted that the Edge zone widths of the preliminary and final dosing device are the same or can be different. Usually the Edge zone width of the downstream of the pre-metering device Final dosing device from the edge zone width of the Differentiate pre-metering device because of the order of the liquid or pasty medium by means of Predosing device an expansion or swelling of the Material web occurs in the width direction, which is already as it passes through the coated web of material downstream final metering device makes noticeable.

For manipulating the cross profile in the edge area of the current Material web are advantageous Embodiment of the application according to the invention Adjustment points of at least one of the edge zones of the Predosing device associated actuator and at least one assigned to the edge zone of the final metering device Actuator seen in the direction of travel of the material web essentially directly one after the other. This one too coordinated arrangement of the edge zone actuators the respective facility may have an extension the current coated by the pre-metering device Material web to be taken into account, so that if necessary low Deviation from the aforementioned position information is necessary could be.

The application work according to the invention comprises in another preferred embodiment expediently at least one Control device, the pre-metering device and Final dosing device in a coordinated Control loop of this control device are integrated. This allowed while the application is running a quick and reliable adjustment to changing Operating conditions.

The object underlying the invention is further solved by an inventive method for regulated Setting a desired cross profile using a Applicator according to one of claims 1 to 23 directly a running material web, in particular made of paper or Cardboard, applied liquid or pasty medium, where the method comprises the features of claim 24. Accordingly, is used to set the desired cross profile if necessary both a first cross profile correction by adjusting the Actuators of the pre-metering device as well as a second one Cross-section correction of the final control device actuators made, the first and second Cross-section correction in its effect to a required Complete the overall correction of the cross profile. The The method according to the invention already provides the context with the application mentioned advantages.

Advantageously, in the case of the invention Proceed a long-wave correction of the cross profile regulated adjustment of the actuators of the Predosing device, and a short-wave correction of Deviations of the cross profile by regulated adjustment of the Actuators of the final metering device. The same is true according to the invention, however, also a short-wave correction of the Cross profile by regulated adjustment of the actuators Predosing device, and a long-wave correction of the Deviations of the cross profile by regulated adjustment of the Actuators of the final metering device are provided.

With this type of control, a long-wave or short-wave correction of the transverse profile and thus of the coat weight of the applied liquid or pasty medium or a setting of another with the transverse profile or
Coating weight related property, such as gloss, opacity, whiteness, moisture and the like. This leads to a more effective control system with reduced adjustment movements and consequently less wear on the components of the application unit to be adjusted.

Adjusting the actuators of the front and Final dispenser can be in line with the inventive method both sequentially and in essentially done synchronously.

Basically, both the pre and the Final dosing device can be adjusted by hand. In the event of of the presence of a control loop it is possible one of the two furnishings by hand and the other one via the control loop or both devices via one mutually independent or coordinated regulation one note.

In the method according to the invention, it has also proven to be of Proved advantage that a rough adjustment of the cross section through the pre-metering device, and a fine adjustment of the Cross profile is made by the final metering device. It is also possible that a rough adjustment of the Cross profile through the final metering device, and a Fine adjustment of the cross profile by the Predosing device is made. The order of Coarse and fine adjustment is arbitrary.

Fig. 1

eine schematische Querschnittsdarstellung einer ersten Grundkonfiguration für das erfindungsgemäße Auftragwerks,

Fig. 2

eine schematische Querschnittsdarstellung einer zweiten Grundkonfiguration für das erfindungsgemäße Auftragwerks,

Fig. 3 bis 13

schematische Draufsichten der zu Anschauungszwecken in einer gemeinsamen Darstellungsebene gezeigten Zonen der Vor- und Enddosiereinrichtung einer ersten bis elften Ausführungsform des ersten erfindungsgemäßen Auftragwerks,

Fig. 14 bis 20

schematische Draufsichten der zu Anschauungszwecken in einer gemeinsamen Darstellungsebene gezeigten Zonen der Vor- und Enddosiereinrichtung einer ersten bis siebenten Ausführungsform des zweiten erfindungsgemäßen Auftragwerks,

Fig. 21

ein schematisches Diagramm, das die Querprofilabweichungen über der Maschinenbreite bei verschiedenen Betriebszuständen des ersten und zweiten Auftragwerks darstellt.

Preferred exemplary embodiments of the invention with additional design details and further advantages are described and explained in more detail below with reference to the accompanying drawings. It shows:

Fig. 1

2 shows a schematic cross-sectional representation of a first basic configuration for the application unit according to the invention,

Fig. 2

2 shows a schematic cross-sectional representation of a second basic configuration for the application unit according to the invention,

3 to 13

schematic plan views of the zones of the preliminary and final metering device of a first to eleventh embodiment of the first application device according to the invention shown in a common representation level for illustrative purposes,

14 to 20

schematic plan views of the zones of the preliminary and final metering device of a first to seventh embodiment of the second application unit according to the invention shown in a common representation level for illustrative purposes,

Fig. 21

is a schematic diagram illustrating the cross profile deviations across the machine width in different operating states of the first and second applicator.

In the description below and in the figures To avoid repetitions, the same components and Components also identified with the same reference symbols, unless further differentiation is required.

1 is a schematic cross-sectional representation a first basic configuration for the invention To see application work. The commission includes one Counter roll 2, on the one to be provided with an order Material web 4 runs, which during the application process of the Counter roll 2 is supported. The direction of rotation of the counter roller 2 and thus the running direction of the material web 4 is in the Figure marked by an arrow. A as Predosing device V designed application, the one not shown in the figure, essentially over extending the entire length of the pre-metering device V. Comprised of bars, the counter-roller 2 is opposite. The bar the pre-metering device V contains a distribution pipe for the liquid or to be applied to the running material web 4 pasty medium, hereinafter referred to as coating medium referred to as. This comes from the distribution pipe coating medium to be applied under pressure in an as Free jet nozzle formed metering gap 6, the between an inlet-side 8 and outlet-side lip 10 of the Predosing device V is formed, and is from the Dosing gap 6 emerges on the surface of the current Material web 4 applied. The coating medium is through one Marked arrow 12.

The inlet-side lip 2 of the pre-metering device V is divided into a plurality of adjustable zones, which extend transversely to the direction of travel of the material web 4, for setting both a longitudinal and a transverse profile of the liquid or pasty coating medium to be applied, with one or more actuators 14 _{v being} assigned to each zone is. In this way, the lip 8 on the inlet side can be profiled by the actuators 14 _v both uniformly over substantially their entire longitudinal extent and, if necessary, different zones. The precise configuration of the zones of the pre-metering device V will be discussed in more detail below.

As can also be seen in FIG. 1, the pre-metering device V is followed by a final metering device E, viewed in the direction of travel of the material web 4. The final metering device E comprises a support bar (not shown) and a doctor element held in a doctor element holder fastened to the support bar in the form of a continuous doctor blade 16 which extends essentially over the entire web width and with which the coating medium 12 previously applied to the material web 4 by means of the pre-metering device V is used Setting a desired cross profile is doctored off. The final metering device E, ie more precisely the doctor blade 16 in the present case, is divided into a plurality of adjustable zones extending transversely to the running direction of the material web 4, each zone preferably being assigned one or more actuators 14 _e . The zones of the doctor blade 16 are to be understood in the present case as regions of a defined size extending transversely to the direction of travel of the material web 4, which are adjusted by the actuators 14 _e compared to other regions of the doctor blade 16 of similar design for setting a specific transverse profile in relation to the web width of the material web 4 are locally adjustable. This adjustability is ensured by the reversible deformability of the doctor blade 16. There is therefore no physical separation of the zones of the doctor blade 16, as is the case by parting lines or the like. Such a physical separation of the zones is, however, quite conceivable in other embodiments according to the invention, for example in the case of using a doctor element held in a doctor element holder which is divided into zones like a comb, the actuators 14 _e then being able to act on the zones of the doctor element holder. The exact configuration of the zones of the final metering device E will be discussed in more detail below.

The actuators 14v and 14e of the front and Final dosing devices are expediently in one Control loop of at least one, not shown Control device integrated, so that during operation of the Commissioned and depending on various, the cross profile influencing parameters if necessary a fast and reliable correction of the cross profile can be made can.

2 shows a schematic cross-sectional illustration a second basic configuration for the invention Commissioned. The basic configuration of this configuration corresponds essentially to that of FIG. 1, but in In contrast, the commissioned work for a "spatially separated" Pre and final dosing designed. That is, the Predosing device V is a first counter roll 2.1 and the final metering device E of a second counter roll 2.2 assigned, seen in the running direction of the material web 4 the first counter-roller 2.1 is connected.

For the following in connection with FIGS. 3 to 20 described application mechanism variants according to the invention basically in the previously described Basic configurations according to FIGS. 1 and 2 can be used.

FIG. 3 shows a schematic plan view of the zones Z _{v of} the pre-metering device V and zones Z _{e of} the final metering device E of a first embodiment of the application unit according to the invention, shown in a common representation level for purposes of illustration. In the drawings, the respective zones Z _v and Z _{e of} the pre-metering device V and final metering device E are indicated in simplified form as rectangular boxes. As can be seen in the figure, the respective zones Z _v and Z _e extend transversely to the running direction of the material web 4 over its substantially entire width B, the respective zone widths b _{v of} the pre-metering device V and the respective zone widths b _{e of} the final metering device E being identical , As further indicated in FIG. 3, the zones Z _v and Z _{e, seen} in the running direction of the material web 4, lie directly one behind the other without any lateral offset. The number of the respective zones Z _v and Z _e and their respective zone widths b _v and b _e differ depending on the application, so that the manner of representation in the drawings is only explanatory. 3, both the pre-metering device V and the final metering device E comprise edge zones Z _vr and Z _er extending laterally beyond a respective side edge of the running material web 4. The zone width b _{vr of} the edge zone Z _{vr of} the pre-metering device V is different in the present example from the zone width b _{v of} the other Z _{v of} the pre-metering device V. Likewise, the zone width b _{er of} the edge zones Z _{er of} the end metering device E is different from the zone width b _{e of} the other zones Z _{e of} the end metering device E. The edge zone width b _{er of} the end metering device E is different from the edge zone width b _{vr of} the pre-metering device V by one by Application of the liquid or pasty coating medium and expansion ΔB or swelling of the material web that occurs after the material web has passed through the pre-metering device V in the web width direction.

The edge zones Z _vr and Z _er explained _above can in principle also have the same width as the respective other zones Z _v or Z _{e of} the preliminary and final metering device. This is the case, for example, when an edge zone Z _vr or Z _{er is formed} by a zone Z _v or Z _{e of} the preliminary and final metering device which projects beyond the edge of the material web.

In the drawings, the adjustment points P _{v of} the actuators 14 _{v of} the pre-metering device V are shown as crosses and the adjustment points P _{e of} the actuators 14 _{e of} the final metering device E are shown in simplified form as circles. In the sense of the invention, an adjustment point of an actuator is to be understood as the generally punctiform area in which the actuator intervenes on the preliminary or final metering device E.

In the embodiment according to FIG. 3, the graduation T _v formed by the mutual distance of the adjustment points P _v of the actuators assigned to the zones Z _{v of} the pre-metering device V and the division by the mutual distance of the adjustment points P _e of the zones Z _{e of} the final metering device E. Actuators formed Te division identical and seen in the direction of the web of material 4 are also directly behind each other. Likewise, the adjustment points of the edge zones Z _{vr of} the pre-metering device V and the adjustment points of the edge zones Z _{he of} the final metering device E, seen in the running direction of the material web 4, are essentially directly behind one another. The position of the adjustment points of the edge zones Z _vr and Z _he related to the width direction of the material web 4 can, however, differ slightly in order to take into account any extensions ΔB of the material web that may occur in the web width direction.

4 to 12, each 3 corresponding views, is the Material web 4 not for the sake of clarity shown.

FIG. 4 shows a second embodiment of the applicator according to the invention, which corresponds essentially to the variant according to FIG. 3, in which the zones Z _v and Z _{e are} directly behind one another as seen in the running direction of the material web without lateral offset. In this application, however, the respective zones Z _{v of} the pre-metering device V and the respective zones Z _{e of} the final metering device E are assigned two actuators. Accordingly exist per zone Z _v two adjustment points P _v and per zone Z _e two adjustment points P _e, when viewed in the running direction of the material web are located directly one behind the other.

5 shows a third embodiment of the application unit according to the invention, in which the zones Z _v and Z _e , viewed in the direction of travel of the material web, are in turn directly behind one another, but due to the mutual spacing of the adjustment points P _v of the zones Z _{v of} the pre-metering device V assigned actuators division T _v and the division T _e formed by the mutual spacing of the adjustment points P _e of the actuators assigned to the zones Z _{e of} the final metering device E are different from each other. This results from the fact that the zones Z _{v of} the pre-metering device V each have two and the zones Z _{e of} the final metering device E each have only one adjustment point and the division T _{e is} an integral multiple of the division T _v . In the present case, T _e = 2 * T _v . When considering the preliminary and final metering device in the running direction of the material web, it can be seen that, in relation to the width direction of the material web, an integral multiple of the smaller division T _{v is} not congruent with the larger division Te. Consequently, the positions of the respective adjustment points of the preliminary and final metering device are not congruent when viewed in the direction of travel of the material web. Rather, it results from this configuration that the respective adjustment points of the pre-metering device V and the final metering device E are offset relative to one another in the direction of travel of the material web by a predetermined amount Y in the width direction of the material web.

6 shows a fourth embodiment, in which the zones Z _v and Z _{e, seen} in the direction of travel of the material web, lie directly one behind the other without lateral offset, and the actuators assigned to the zones Z _{e of} the final metering device E, however, by their respective mutual spacing of their adjustment points P _e form two divisions T _e1 and T _e2 , which are different from each other. In addition, with this configuration, every fourth adjustment point P _{e of} the final metering device E, viewed in the direction of travel of the material web, lies directly behind an adjustment point P _{v of} the pre-metering device V. Likewise, it is of course conceivable that the actuators assigned to the zones Z _{v of} the pre-metering device V are by their respective mutual distance their adjustment points form two divisions that are different from each other. This would lead to a configuration in which the number and position of the respective adjustment points of the preliminary and final metering device are exactly interchanged.

FIG. 7 shows a fifth embodiment of the application unit according to the invention in a representation analogous to FIG. 3. As can be clearly seen in the drawing, the zones Z _{v of} the pre-metering device V and the zones Z _{e of} the final metering device E are offset by a predetermined amount x in the width direction of the material web when viewed in the running direction of the material web. This amount x preferably corresponds to half of the respectively identical zone widths b _v and b _{e of} the preliminary and final metering device. The same graduations T _v and T _e formed by the respective adjustment points of the preliminary and final metering device are not congruent when viewed in the running direction of the material web. The same applies to the adjustment points.

FIG. 8 shows a sixth embodiment of the application unit according to the invention, which corresponds essentially to the variant according to FIG. When viewed in the direction of travel of the material web, the zones of the preliminary and final metering device are offset by a predetermined amount x = 0.5 * b _v (or 0.5 * b _e ) in the width direction of the material web, and each of the zones of the preliminary and the end metering device is assigned the same number of actuators and thus of adjustment points, the divisions T _v and T _e formed by the mutual distance between the adjustment points of the actuators assigned to the zones of the preliminary and end metering device being the same. In the configuration formed in this way, the respective adjustment points of the pre-metering device V and the final metering device E, as seen in the running direction of the material web, lie directly one behind the other.

Furthermore, FIG. 9 shows a seventh embodiment essentially corresponding to the variant according to FIG. 8, in which the respective adjustment points of the pre-metering device V and the final metering device E are offset relative to one another in the direction of travel of the material web by such a predetermined amount y in the width direction of the material web, which corresponds to half of the identical divisions T _v and T _e .

10 shows an eighth embodiment of the application unit according to the invention, in which the zones of the pre-metering device V and the zones of the final metering device E are in turn offset by a predetermined amount x and the division T _{e is} an integral multiple of the division T _v . In the present case, T _e = 2 * T _v . When viewed in the direction of travel of the material web and in relation to the width direction of the material web, the integer multiple of the smaller division T _{v is} not congruent with the larger division T _e . The same applies to the adjustment points of the preliminary and final dosing device.

FIG. 11 shows a ninth embodiment of the application unit according to the variant which corresponds essentially to the variant according to FIG. 10, but here the number and arrangement of the adjustment points of the preliminary and final metering device are exactly interchanged compared to FIG. 9, the division T _v now being an integer Is a multiple of the division T _e .

FIG. 12 shows a tenth embodiment of the application unit according to the invention, which corresponds essentially to the variant according to FIG. 10. Here, the offset x of the zones of the pre-metering device V and the final metering device E lying in the width direction of the material web and the number and position of the respective adjustment points are selected such that, viewed in the direction of travel of the material web, and in relation to the width direction of the material web, an integral multiple of the smaller division T _{v is} congruent with the larger division T _e . Viewed in the direction of travel of the material web, the individual adjustment point P _{e of} a respective zone of the final metering device E is also directly behind the first of the two adjustment points P _{v of} a respective zone of the pre-metering device V.

13 shows an eleventh embodiment of the application unit according to the invention, in which the zones Z _v and Z _e , viewed in the direction of travel of the material web, are in turn directly behind one another without lateral displacement. In this variant, the pre-metering device V has two divisions T _v1 and T _v2 , which are different from one another, and the final metering device E also has different divisions T _e1 and T _e2 . The division T _{v2 of} the pre-metering device V results from a distance of two adjacent adjustment points located at the edge regions of a zone Z _v , while the division T _v1 results from a uniform mutual distance between the adjustment points within the zone Z _v .

FIG. 14 shows a schematic plan view of the zones Z _{v of} the pre-metering device V and zones Z _{e of} the final metering device E of a first embodiment of the second application unit according to the invention, shown in a common display plane for purposes of illustration. In the drawings, the respective zones Z _v and Z _{e of} the pre-metering device V and final metering device E are indicated in simplified form as rectangular boxes. As can be seen from the figure, the respective zones Z _v and Z _e extend transversely to the running direction of the material web 4 over its substantially entire width B, the respective zone widths b _{v of} the pre-metering device V and the respective zone widths b _{e of} the final metering device E being different from one another are. In the present case, the width of a zone Z _{v of} the pre-metering device V is twice the width of a zone Z _{e of} the final metering device. As further indicated in FIG. 3, the zones Z _v and Z _{e of} different widths lie directly one behind the other in the direction of travel of the material web 4 without any lateral offset. The number of the respective zones Z _v and Z _e and their respective zone widths b _v and b _e differ depending on the application, so that the manner of representation in the drawings is only explanatory. 3, both the pre-metering device V and the final metering device E comprise edge zones Z _vr and Z _er extending laterally beyond a respective side edge of the running material web 4. The zone width b _{vr of} the edge zone Z _{vr of} the pre-metering device V is different in the present example from the zone width b _{v of} the other Z _{v of} the pre-metering device V. Likewise, the zone width b _{er of} the edge zones Z _{er of} the end metering device E is different from the zone width b _{e of} the other zones Z _{e of} the end metering device E. The edge zone width b _{er of} the end metering device E is different from the edge zone width b _{vr of} the pre-metering device V by one by Application of the liquid or pasty coating medium and expansion ΔB or swelling of the material web that occurs after the material web has passed through the pre-metering device V in the web width direction.

The edge zones Z _vr and Z _er explained _above can in principle also have the same width as the respective other zones Z _v or Z _{e of} the preliminary and final metering device. This is the case, for example, when an edge zone Z _vr or Z _{er is formed} by a zone Z _v or Z _{e of} the preliminary and final metering device which projects beyond the edge of the material web.

In the drawings, the adjustment points P _{v of} the actuators 14 _{v of} the pre-metering device V are shown as crosses and the adjustment points P _{e of} the actuators 14 _{e of} the final metering device E are shown in simplified form as circles. In the sense of the invention, an adjustment point of an actuator is to be understood as the generally punctiform area in which the actuator intervenes on the preliminary or final metering device E.

In the embodiment according to FIG. 14, the respective zones Z _{v of} the pre-metering device V are assigned two actuators and the respective zones Z _{e of} the final metering device E are assigned an actuator. Accordingly, two adjustment points P Z and _v per zone Z _e is an adjusting point P _{e v} exist per zone. The pitch T _v formed by the mutual spacing of the adjustment points P _v of the actuators assigned to the zones Z _{v of} the predosing device V and the pitch T _e formed by the mutual spacing of the adjusting points P _e of the actuators assigned to the zones Z _{e of} the final metering device E. seen in the running direction of the material web 4 also directly one behind the other. Likewise, the adjustment points of the edge zones Z _{vr of} the pre-metering device V and the adjustment points of the edge zones Z _{he of} the final metering device E, seen in the running direction of the material web 4, are essentially directly behind one another. The position of the adjustment points of the edge zones Z _vr and Z _he related to the width direction of the material web 4 can, however, differ slightly in order to take into account any extensions ΔB of the material web that may occur in the web width direction.

15 to 20, each of the 14 shows corresponding views, the material web 4 not shown for the sake of clarity.

FIG. 15 shows a second embodiment of the second applicator according to the invention, which corresponds essentially to the variant according to FIG. 14, but here the number and arrangement of the adjustment points of the preliminary and final metering device are exactly reversed compared to FIG. 14. In this example, the zone width b _{e of} the zones Z _{e of} the final metering device E is also greater than the zone width b _{v of} the zones Z _{v of} the pre-metering device V.

16 shows, in a representation analogous to FIG. 14, a third embodiment of the second application unit according to the invention, in which the zones Z _v and Z _e , which each have only one adjustment point in the case of different zone widths, are each seen in the running direction of the material web without lateral offset lie directly one behind the other, and the pitch T _v formed by the mutual spacing of the adjustment points P _v of the actuators assigned to the zones Z _{v of} the predosing device V and the pitch formed by the mutual spacing of the adjusting points P _e of the actuators assigned to the zones Z _{e of} the final metering device E. T _e are different from each other. The division T _v is an integer multiple of the division T _e . In the present case, T _v = 2 * T _e . Looking at the preliminary and final metering device in the running direction of the material web, it can also be seen that, in relation to the width direction of the material web, an integral multiple of the smaller division T _{e is} not congruent with the larger division T _v . Consequently, the positions of the respective adjustment points P _v , P _{e of} the preliminary and final metering device are not congruent when viewed in the direction of travel of the material web. Rather, it results from this configuration that the respective adjustment points of the pre-metering device V and the final metering device E are offset relative to one another in the direction of travel of the material web by a predetermined amount Y in the width direction of the material web.

Fig. 17 shows a fourth embodiment of the second applicator according to the invention, in which the zones Z _v and Z _{e of} different widths, viewed in the direction of travel of the material web, lie directly one behind the other without lateral offset, the actuators assigned to the zones Z _{e of} the final metering device E by their respective mutual spacing However, their adjustment points P _{e form} two divisions T _e1 and T _e2 , which are different from one another. Since the final metering device E comprises zones to which either one or two adjusting points are assigned, there are both adjusting point P _{e of} the final metering device E in this configuration, which, viewed in the direction of travel of the material web, lie directly behind an adjusting point P _{v of} the pre-metering device V, as well as adjusting points P _e , which are offset from adjustment points P _{v of} the pre-metering device V in the running direction of the material web by a predetermined amount Y in the width direction of the material web. As an alternative to this embodiment, a variant is of course also conceivable in which the actuators assigned to the zones Z _{v of} the pre-metering device V form at least two divisions which are different from one another due to their respective mutual spacing of their adjustment points.

FIG. 18 shows a fifth embodiment of the second application unit according to the invention in a representation analogous to FIG. 14. As can be clearly seen in the drawing, the zones Z _v and zones Z _{e of} the preliminary and final metering devices, which are of different widths, are offset by a predetermined amount x in the width direction of the material web when viewed in the running direction of the material web. In the present case, this amount x corresponds to half the zone width b _{v of} the zones Z _{v of the} pre-metering device V, which is smaller than the zone width b _{e of} the zones Z _{e of} the final metering device E. The same size formed by the respective adjustment points P _v , P _{e of} the pre-metering and final metering device Divisions T _v and T _e , and thus also the positions of the respective adjustment points P _v , P _e , are not congruent when viewed in the direction of travel of the material web, but are offset by a predetermined amount Y in the width direction of the material web.

FIG. 19 shows a sixth embodiment of the second application unit according to the invention, which corresponds essentially to the variant according to FIG. 18. Each zone of the preliminary and final metering device is assigned an adjustment point and the offset x in the width direction of the material web of the zones of different widths of the pre-metering device V and the final metering device E and the number and position of the respective adjusting points are chosen so that the material web is viewed in the running direction and based on the width direction of the material web, an integral multiple of the smaller pitch T _{v is} congruent with the larger pitch T _e . In the present case, T _e = 2 * T _v . Seen in the direction of travel of the material web, an adjustment point P _{e of} the final metering device E lies directly behind a first or third adjustment point P _{v of} the pre-metering device V.

FIG. 20 shows a seventh embodiment of the second application unit according to the invention in a representation analogous to FIG. 14. The special feature of this variant is that not only are the zone widths of the zones of the preliminary and final metering devices different from one another, but also the respective zones of the pre-metering device V comprise two different zone types Z _v1 , Z _v2 , whose zone widths b _v1 , b _v2 differ from one another are. In the present example, the zones of the final metering device E also comprise at least two different zone types Z _e1 , Z _e2 , whose zone widths b _e1 , b _e2 are different from one another. The zones Z _v1 , Z _v2 and Z _e1 , Z _{e2 of} the preliminary and final metering device are also offset from one another in the width direction of the material web in this exemplary embodiment. The respective zone widths b _v1 , b _v2 , b _e1 , b _e2 and the number and arrangement of the adjustment points P _v , P _{e of} the preliminary and final metering device are selected such that the adjustment points P _e and P _{v are seen} directly in succession in the direction of travel of the material web lie.

For the controlled setting of a desired cross profile of a liquid or pasty coating medium applied directly to a running material web 4, in particular made of paper or cardboard, by means of an application unit according to the invention, both a first cross profile correction by adjusting the actuators 14 _{v of} the pre-metering device V and a second cross profile correction are required by adjusting the actuators of the final metering device E, the effect of the first and second profile corrections being complementary to a required overall correction of the cross profile. A long-wave correction of the cross profile is preferably carried out by regulated adjustment of the actuators 14 _{v of} the pre-metering device V and a short-wave correction of the deviations of the cross profile by controlled adjustment of the actuators 14 _{e of} the final metering device E. However, it is also provided according to the invention that, in certain applications, a short-wave correction of the cross profile by controlled adjustment of the actuators 14 _{v of} the pre-metering device and a long-wave correction of the deviation of the cross profile by controlled adjustment of the actuators 14 _{e of} the final metering device E. If predominantly long-wave profile components are to be corrected with the actuators 14 _{v of} the pre-metering device V, fewer actuators 14 _v can usually be used than actuators 14 _e . As already mentioned at the beginning, the actuators 14 _v and 14 _{e of} the preliminary and final metering device are integrated in a control circuit, not shown in the figures. The actuators 14 _v and 14 _e can be adjusted in succession or essentially simultaneously.

Kurve a)

bei einem Betriebszustand ohne jegliche Querprofilierung,

Kurve b)

nach einer Grobeinstellung durch die Vor- oder Enddosiereinrichtung, und

Kurve c)

nach einer Feineinstellung durch die Vor- oder Enddosiereinrichtung.

In addition, a rough adjustment of the cross profile can be carried out by the pre-metering device V and a fine adjustment of the cross profile by the final metering device E. However, it is also possible for the cross-section to be roughly adjusted by the final metering device E, and for the cross-section to be fine-tuned by the pre-metering device V. The order of the rough and fine adjustment is arbitrary. FIG. 21 illustrates the effects of such a setting in a schematic diagram which shows the cross-profile deviations d over the material web width B under different operating states of the application unit, specifically according to FIG

Curve a)

in an operating state without any cross-profiling,

Curve b)

after a rough adjustment by the preliminary or final dosing device, and

Curve c)

after a fine adjustment by the pre or final dosing device.

The invention is not limited to the above exemplary embodiments, which only serve to explain the basic idea of the invention in general. Within the scope of the scope of protection, the application work according to the invention can rather also take embodiments other than those described above. The application can have features that represent a combination of the respective individual features of the claims. Configurations are also possible which essentially correspond to the embodiments shown in the figures, although the number and position of the respective adjustment points of the preliminary and final metering device, as is the case in FIGS. 9 and 10, is exactly interchanged. If necessary, the divisions T _v and Te explained above can of course also be a non-integer multiple of the other division T _e or T _v instead of an integer multiple. Likewise, in such a variant, one or more adjustment points of the final metering device, seen in the direction of travel of the material web, can lie directly behind one or more adjustment points of the pre-metering device and / or multiples of the respectively smaller of the mentioned divisions in the direction of travel of the material web can be congruent with the respectively larger of these divisions.

Reference signs in the claims, the description and the drawings serve only for a better understanding of the Invention and are not intended to limit the scope.

LIST OF REFERENCE NUMBERS

2

Gegenwalze

2.1

Gegenwalze

2.2

Gegenwalze

4

Materialbahn

6

Dosierspalt

8

zulaufseitige Lippe von 6

10

ablaufseitige Lippe von 6

12

Streichmedium

14_e

Stellglieder der Enddosiereinrichtung

14_v

Stellglieder der Vordosiereinrichtung

16

Rakelelement / Rakelklinge

B

Breite der Materialbahn 4

b_e

Zonenbreite der Zonen der Enddosiereinrichtung

b_e1

Zonenbreite einiger Zonen der Enddosiereinrichtung

b_e2

Zonenbreite einiger Zonen der Enddosiereinrichtung

b_er

Zonenbreite der Randzonen der Enddosiereinrichtung

b_v1

Zonenbreite einiger Zonen der Vordosiereinrichtung

b_v2

Zonenbreite einiger Zonen der Vordosiereinrichtung

b_v

Zonenbreite der Zonen der Vordosiereinrichtung

b_vr

Zonenbreite der Randzonen der Vordosiereinrichtung

ΔB

Dehnung der Materialbahn 4 in Bahnbreitenrichtung

d

Querprofilabweichungen

E

Enddosiereinrichtung

P_e

Verstellpunkte der Enddosiereinrichtung

P_v

Verstellpunkte der Vordosiereinrichtung

T_e

Teilung der Verstellpunkte der Enddosiereinrichtung

T_e1

Teilung der Verstellpunkte der Enddosiereinrichtung

T_e2

Teilung der Verstellpunkte der Enddosiereinrichtung

T_v

Teilung der Verstellpunkte der Vordosiereinrichtung

T_v1

Teilung der Verstellpunkte der Vordosiereinrichtung

T_v2

Teilung der Verstellpunkte der Vordosiereinrichtung

V

Vordosiereinrichtung

x

Verschiebung der Zonen Z_e, Z_v in Bahnbreitenrichtung

y

Verschiebung der Teilungen T_e, T_v in Bahnbreitenrichtung

Z_e

Zonen der Enddosiereinrichtung

Z_e1

Zonentypen / Zonen der Enddosiereinrichtung

Z_e2

Zonentypen / Zonen der Enddosiereinrichtung

Z_er

Randzonen der Enddosiereinrichtung

Z_v

Zonen der Vordosiereinrichtung

Z_v1

Zonentypen / Zonen der Vordosiereinrichtung

Z_v2

Zonentypen / Zonen der Vordosiereinrichtung

Z_vr

Randzonen der Vordosiereinrichtung

Designate it:

2

backing roll

2.1

backing roll

2.2

backing roll

4

web

6

metering

8th

inlet lip of 6

10

drain lip of 6

12

coating medium

14 _e

Actuators of the final metering device

14 _v

Actuators of the pre-metering device

16

Doctor element / doctor blade

B

Width of the material web 4

b _e

Zone width of the zones of the final dosing device

b _e1

Zone width of some zones of the final dosing device

b _e2

Zone width of some zones of the final dosing device

b _he

Zone width of the edge zones of the final dosing device

b _v1

Zone width of some zones of the pre-metering device

b _v2

Zone width of some zones of the pre-metering device

b _v

Zone width of the zones of the pre-metering device

b _vr

Zone width of the edge zones of the pre-metering device

.DELTA.B

Elongation of the material web 4 in the direction of the web width

d

Cross profile deviations

e

final metering device

P _e

Adjustment points of the final metering device

P _v

Adjustment points of the pre-metering device

T _e

Division of the adjustment points of the final metering device

T _e1

Division of the adjustment points of the final metering device

T _e2

Division of the adjustment points of the final metering device

T _v

Division of the adjustment points of the pre-metering device

T _v1

Division of the adjustment points of the pre-metering device

T _v2

Division of the adjustment points of the pre-metering device

V

predosing

x

Shift of the zones Z _e , Z _v in the web width direction

y

Shift of the divisions T _e , T _v in the web width direction

Z _e

Zones of the final dosing device

Z _e1

Zone types / zones of the final dosing device

Z _e2

Zone types / zones of the final dosing device

Z _er

Edge zones of the final dosing device

Z _v

Zones of the pre-metering device

Z _v1

Zone types / zones of the pre-metering device

Z _v2

Zone types / zones of the pre-metering device

Z _vr

Edge zones of the pre-metering device

Claims (28)

1. Applicator for the direct application of a liquid or pasty medium (12) to a moving web (4), especially a paper or board web, comprising

   at least one pre-metering device (V) which is equipped with actuators (14_v) for setting a transverse profile, is divided into a large number of zones (Z_v) extending transversely with respect to the running direction of the web (4) and can be profiled zone by zone by the actuators (14_v), each zone (Z_v) being assigned at least one actuator (14_v), and

   at least one final metering device (E) which is connected downstream of the pre-metering device (V) in the running direction of the web (4), is likewise equipped with actuators (14_e) is divided into a large number of zones (Z_e) extending transversely with respect to the running direction of the web (4) and can be profiled zone by zone by the actuators (14_e) in order to set a transverse profile, each zone (Z_e) being assigned at least one actuator (14_e),

   respective zone widths (b_v, b_e) of the pre-metering device (V) and of the final metering device (E) being identical.
2. Applicator for the direct application of a liquid or pasty medium (12) to a moving web (4), especially a paper or board web, comprising

   at least one pre-metering device (V) which is equipped with actuators (14_v) for setting a transverse profile, is divided into a large number of zones (Z_v) extending transversely with respect to the running direction of the web (4) and can be profiled zone by zone by the actuators (14_v), each zone (Z_v) being assigned at least one actuator (14_v), and

   at least one final metering device (E) which is connected downstream of the pre-metering device (V) in the running direction of the web (4), is likewise equipped with actuators (14_e) is divided into a large number of zones (Z_e) extending transversely with respect to the running direction of the web (4) and can be profiled zone by zone by the actuators (14_e) in order to set a transverse profile, each zone (Z_e) being assigned at least one actuator (14_e),

   respective zone widths (b_v, b_e) of the pre-metering device (V) and of the final metering device (E) being different from each other.
3. Applicator according to Claim 1 or 2, characterized in that, as viewed in the running direction of the web (4), the zones (Z_v) and (Z_e) are located directly one behind the other.
4. Applicator according to Claim 1 or 2, characterized in that, as viewed in the running direction of the web (4), the zones (Z_v) and (Z_e) are offset with respect to each other by a predetermined amount (x) in the width direction (B) of the web (4).
5. Applicator according to Claim 1 and 4, characterized in that, as viewed in the running direction of the web (4), the zones (Z_v) and (Z_e) are offset with respect to each other in the width direction (B) of the web (4) by a predetermined amount (x) which corresponds to half the respective identical zone widths (b_v, b_e).
6. Applicator according to Claim 1 and one of Claims 3 to 5, characterized in that

   the pitch (T_v) formed by the mutual spacing between the adjustment points (P_v) of the actuators (14_v) assigned to the zones (Z_v) of the pre-metering device (V) and

   the pitch (T_e) formed by the mutual spacing of the adjustment points (P_e) of the actuators (14_e) assigned to the zones (Z_e) of the final metering device (E) are identical.
7. Applicator according to Claims 2 and 4, characterized in that, as viewed in the running direction of the web (4), the zones (Z_v) and (Z_e) are offset with respect to each other in the width direction (B) of the web (4) by a predetermined amount (x) which corresponds to half the respectively smaller of the mutually different zones widths (b_v, b_e).
8. Applicator according to Claim 2 and one of Claims 3, 4 or 7, characterized in that the zones of the pre-metering device (V) comprise at least two zone types (Z_v1, Z_v2), whose zone widths (b_v1, b_v2) are different from each other.
9. Applicator according to Claim 2 and one of Claims 3, 4, 7 or 8, characterized in that the zones of the final metering device (E) comprise at least two zone types (Z_e1, Z_e2) whose zone widths (b_e1, b_e2) are different from each other.
10. Applicator according to Claim 2 and one of Claims 3, 4, 7, 8 or 9, characterized in that

    the pitch (T_v) formed by the mutual spacing between the adjustment points (P_v) of the actuators (14_v) assigned to the zones (Z_v) of the pre-metering device (V) and

    the pitch (T_e) formed by the mutual spacing of the adjustment points (P_e) of the actuators (14_e) assigned to the zones (Z_e) of the final metering device (E) are different from each other.
11. Applicator according to Claim 1 and 6 or 2 and 10, characterized in that the respective adjustment points (P_v, P_e) of the pre-metering device (V) and the final metering device (E), as viewed in the running direction of the web (4), are located directly one behind the other.
12. Applicator according to Claim 1 and 6 or 2 and 10, characterized in that the respective adjustment points (P_v, P_e) of the pre-metering device (V) and the final metering device (E), as viewed in the running direction of the web (4), are offset with respect to each other in the width direction (B) of the web (4) by a predetermined amount (y).
13. Applicator according to Claim 1 or 2 and 12, characterized in that the respective adjustment points (P_v, P_e) of the pre-metering device (V) and the final metering device (E), as viewed in the running direction of the web (4), are offset with respect to one another in the width direction (B) of the web (4) by a predetermined amount (y) which corresponds to half the respective identical pitches (T_v, T_e).
14. Applicator according to one or more of the preceding claims, characterized in that

    the pitch (T_v) formed by the mutual spacing between the adjustment points (P_v) of the actuators (14_v) assigned to the zones (Z_v) of the pre-metering device (V) and

    the pitch (T_e) formed by the mutual spacing of the adjustment points (P_e) of the actuators (14_e) assigned to the zones (Z_e) of the final metering device (E) are different from each other.
15. Applicator according to Claim 14, characterized in that the pitch (T_v) is an integer multiple of the pitch (T_e) or vice versa.
16. Applicator according to Claim 14 or 15, characterized in that, as viewed in the running direction of the web (4) and referred to the width direction (B) of the web (4), an integer multiple of the respectively smaller pitch (T_v) or (T_e) coincides with the respectively larger pitch (T_e) or (T_v).
17. Applicator according to Claim 14 or 15, characterized in that, as viewed in the running direction of the web (4) and referred to the width direction (B) of the web (4), an integer multiple of the respectively smaller pitch (T_v) or (T_e) does not coincide with the respectively larger pitch (T_e) or (T_v).
18. Applicator according to one or more of the preceding claims, characterized in that the actuators (14_v) assigned to the zones (Z_v) of the pre-metering device (V), by their respective mutual spacing between their adjustment points (P_v), form at least two pitches (T_v1) and (T_v2) which are different from each other.
19. Applicator according to one or more of the preceding claims, characterized in that the actuators (14_e) assigned to the zones (Z_e) of the final metering device (E), by their respective mutual spacing between their adjustment points (P_e), form at least two pitches (T_e1) and (T_e2) which are different from each other.
20. Applicator according to one or more of the preceding claims, characterized in that

    the pre-metering device (V) comprises at least one edge zone (Z_vr) that extends laterally beyond one edge of the moving web (4),
    and/or

    the final metering device (E) comprises at least one edge zone (Z_er) that extends laterally beyond one edge of the moving web (4).
21. Applicator according to Claim 20, characterized in that

    the zone width (b_vr) of the edge zone (Z_vr) of the pre-metering device (V) is different from the zone width (b_v) of the other zones (Z_v) of the pre-metering device (V),
    and/or

    the zone width (b_er) of the edge zone (Z_er) of the final metering device (E) is different from the zone width (b_e) of the other zones (Z_e) of the final metering device (E).
22. Applicator according to Claim 10 or 21, characterized in that the adjustment points (P_v, P_e) of at least one actuator (14_v) assigned to the edge zone (Z_vr) of the pre-metering device (V), and of at least one actuator (14_e) eassigned to the edge zone (Z_er) of the final metering device (E), as viewed in the running direction of the web (4), are located substantially directly one behind the other.
23. Applicator according to one or more of the preceding claims, characterized in that this further comprises at least one control device, the pre-metering device (V) and the final metering device (E) being incorporated into a mutually coordinated control loop of this control device.
24. Method for the controlled setting of a desired transverse profile of a liquid or pasty medium (12) that is applied directly to a moving web (4), especially a paper or board web, by means of an applicator according to one of Claims 1 to 18, in which

    in order to set the desired transverse profile as required, both a first transverse profile correction is performed by adjusting the actuators (14_v) of the pre-metering device (V), and

    a second transverse profile correction is performed by adjusting the actuators (14_e) of the final metering device (E),

    the first and second transverse profile corrections complementing each other in terms of their effect to form the necessary overall correction to the transverse profile.
25. Method according to Claim 24, characterized by

    long-wave correction of the transverse profile by means of controlled adjustment of the actuators (14_v) of the pre-metering device (V), and

    short-wave correction of the deviations of the transverse profile by means of controlled adjustment of the actuators (14_e) of the final metering device (E).
26. Method according to Claim 24, characterized by

    short-wave correction of the transverse profile by means of controlled adjustment of the actuators (14_v) of the pre-metering device (V), and

    long-wave correction of the deviations of the transverse profile by means of controlled adjustment of the actuators (14_e) of the final metering device (E).
27. Method according to one of Claims 24 to 26, characterized in that

    coarse setting of the transverse profile is performed by the pre-metering device (V), and

    fine setting of the transverse profile is performed by the final metering device (E).
28. Method according to one of Claims 24 to 26, characterized in that

    coarse setting of the transverse profile is performed by the final metering device (E), and

    fine setting of the transverse profile is performed by the pre-metering device (V).

Images