EP1559835A1 - Apparatus and process for applying on both sides of a substrate a fluid or pasty medium with at least one coater on a traveling paper web, in particular of paper or cardboard, as well as a process useful in connection therewith for determining of surface related separate coatings - Google Patents

Abstract

The web coating applicator station (12) has applicators (12a,12b) flanking a moving web (10), of paper or cardboard, to apply a liquid or paste coating on both sides of it. Sensors (14,16) are linked to a decision unit (20,22) which determines the coating volume to be used to cover the web surfaces, using the differences in their signals for web gloss and/or whiteness. A delegation unit (K) gives the values to spread an even coating on both sides of the web.

Description

The invention relates in one aspect to a machine for double-sided application a liquid or pasty application medium by means of at least one Commissioned on a moving web, in particular paper or Carton, with a sensor arrangement that responds to the area-related Total order of application medium on both sides of the web or / and on at least one of the area-related total order to order medium both sides of the material web dependent size.

Such machines are known in many forms. It will be here in particular to so-called coating machines for online painting or Off-line painting of paper or cardboard thought on both sides, namely Such machines, in which both sides simultaneously or quasi-simultaneously or be deleted immediately or in quick succession. It will be special too thought of such cases in which one web side has not dried yet is before the other web page is painted. The machine can For example, be equipped with a film press-coating unit, the simultaneously applied to both sides of the web. But it can also Coater units such as curtain coater, spray coater or so called Blade- or blade commissioned works or commissioned works with be provided corresponding doctor devices, each only on one side Apply the material web. As mentioned, will be in this context all such an embodiment thought that no drying between the Stroke on one side and the dash on the other side is provided. It Can be applied from the outset in a set dosage, such as Usually at the curtain order, or it can be applied in excess be, with subsequent equalization and dosage by means of a Doctor device of the commissioned work.

To achieve a high and uniform coating quality must be at double-sided stroking determines the coating weight on each side or at least be taken into account. There are line weight sensors, the reflective after a near-infrared absorption method the weight for a Can measure web side. Such sensors must be cumbersome calibrated and did not prove to be sufficiently accurate. In contrast, the total line weight, ie the sum of the individual line weights on both material web pages, simply by known Basis weight sensors are measured by before applying the Basis weight of the uncoated material web and after application to both Material web pages the weight per unit area of the material web coated on both sides is measured. The difference between these basis weights gives the total line weight. Field weight sensors have proven to be successful after a radioactive measuring method the basis weight from the extinction of the radiation a radioactive source, usually a β-radiation source Determine intensity through the material web. But it can also optical Sensors are used, the degree of transmission or absorption of the Measure material web.

An object of the invention is to take into account the double-sided brushing of the line weight per material web side (in general of the surface-related Individual order on the respective web page) on the basis of the recorded Total line weight (in general of the area-related total order Application medium on both sides of the web) to allow.

To solve this problem, the invention proposes based on one aspect The machine mentioned above, that this one at the Sensor arrangement has connected determination device, the at least one area-related total order to order medium both sides of the web or the size dependent thereon or reflecting or indicating output from the sensor array receives and on the basis of this output and a distribution relation of the area-related total order on the two sides of the material web the area-related individual orders Application medium for both sides of the web determined.

In this connection, the invention further provides a method for Determine area-related single jobs to order medium during two-sided application of a liquid or pasty application medium means at least one commissioned work on a moving material web, in particular from Paper or board, in which at least one area-related total order on application medium on both sides of the web or one dependent thereon Size representing or reflecting or indicating output of one Sensor arrangement received and based on this issue and a Distribution ratio of the area - related total order to the two sides of the Material distribution representing the area-related Single orders of application medium for both sides of the web is determined.

According to the invention proposal, the measurement of area related Single order, so about the line weight per web page, by means of special Sensors, such as the mentioned infrared reflection sensors dispensable and the associated, complex calibration can be omitted. You can get out of the Measurement results for the total bar and the determined individual weights or the line weight difference between both sides, for example one Realize line weight control per web page. The bar weight per Material web side (generally the area-related single order to application medium per web page) can, for example, as an actual value in the regulation of page-related stroke order, together with a page-related Target value or / and a target value for the whole bar.

It is in particular a computational distribution of the obtained total area order to order medium (of the whole bar) on the thought both web pages, according to the distribution by the value given distribution relation. The distribution relation or the distribution value can be predetermined, such as from a calibration or adjustment of the Stroke division at the beginning of the order resulting sizes, or - preferably - from additional measurements on the running material web resulting sizes.

The splitting value can be a size that is considered in this case Distribution ratio is a distributional distribution of area related Total order on the two sides of the web in the sense of a Quotient formation indicates. The split value may then be appropriate Distribution factor. The distribution value can also be the Distribution of the area - based total contract on the two sides of the Specify material web in the sense of a difference and then expedient as Division difference or division difference.

It is preferably thought that the sensor arrangement at least one one of the sides of the material web associated sensor, which responds to the area-related individual order to the order medium on the assigned page the web or / and at least one of the area-related individual order on application medium dependent on the associated side of the material web Property of the material web. It is particularly preferred that the sensor arrangement in assignment to both sides of the web in each case at least one sensor which responds to the area-related individual order to order medium on the associated side of the web or / and on at least one of area - related individual order to order medium on the assigned page of the Material web dependent property of the material web. It will be especially important thought that this sensor or these sensors are not directly on the area-related individual order, but to a dependent, In contrast, easier and more reliable measurable size.

Further, it is proposed that the determination device or a Further determination device of the control device which the area-related Single order to application medium on the side of the sensor assigned to the Material web or the size thereof representing or reflecting or indicating further output from the sensor array receives, and based on this output, the distribution relation of the area-related total order on the two sides of the material web representing the distribution value. Regarding the method is in suggested in this context that at least one of area-related individual order to order medium on one side of the web or a variable representing or reflecting it or indicating further output from the sensor array and received Basis of this edition of the distribution relation of area related Total order on the two sides of the material web representing Distribution value is determined.

As already indicated, the machine can advantageously at least one Determination device comprehensive control device include the at least one area-related total order to order medium both sides of the web or the size dependent thereon or reflecting or indicating output from the sensor array receives and, based on this output, the area-related overall order on application medium on both sides of the web by controlling the at least one applicator a predetermined or predetermined total target at least approximates. Further, it is proposed that the at least one Commissioned work for both sides of the web an individual adjustment of the area-specific individual order to order medium or that the two Pages of the web in each case at least one own, the individual attitude of the area related individual order to the order medium for the respective page of the Material web permitting commissioned work is assigned, and that the Control device in association with the two sides of the web, respectively comprises at least one controller based on the by the Determination unit for a given area-related individual contract for the respective Side of the material web by controlling the applicator or the side assigned job individually to the area-related individual order Application medium a predetermined or predetermined individual target at least approximates.

In another aspect, the invention relates to a two-sided machine Applying a liquid or pasty application medium by means of at least one Commissioned on a moving web, in particular paper or Carton, with a sensor arrangement that responds to the area-related Total order of application medium on both sides of the web or / and on at least one of the area-related total order to order medium both sides of the web dependent size, and with at least one Control device, the at least one area-related total order Application medium on both sides of the web or the dependent thereof Size representing or reflecting or indicating output of the Sensor arrangement receives and based on this issue the area-related total order to order medium on both sides of the Material web by controlling the at least one applicator one predetermined or predetermined total target at least approximates.

According to the invention, it is proposed according to the invention for this machine that the at least one commissioned work for both sides of the web a individual setting of the area-related individual order to order medium allows or at least one of the two sides of the web own, the individual setting of the area-related individual order Application medium for the respective side of the web permitting commissioned work is assigned, that the sensor arrangement at least one of the sides of the Material web associated sensor, which responds to the area - related individual order to order medium on the assigned page of the Material web or / and on at least one of the area-related individual order Application medium on the associated side of the material web dependent property the web, and that the control device at least one area-related single order to order medium on the the sensor associated side of the web or the dependent thereon property representing or reflecting or indicating another edition of the Sensor arrangement receives and based on this output in combination with the total area-based order of the order medium on both sides of the Material web or the size thereof representing or reflecting or indicating output by triggering the Auftragwerks or commissioned works for both sides of the material web respectively individually to the area-related individual order to the order medium predetermined or predetermined respective individual target at least approximates.

In this context, the invention further provides a method for two-sided Applying a liquid or pasty application medium by means of at least one Commissioned on a moving web, in particular paper or Carton, ready, at least one of the area-related total order Application medium on both sides of the web or one dependent thereon Size representing or reflecting or indicating output of one Sensor array received and based on this edition of the area-related total order to order medium on both sides of the Material web by controlling the at least one applicator one predetermined or predetermined total target is at least approximated. According to the invention, it is proposed that at least one of the surface-related Single order to application medium on one side of the web or one of them dependent property representing or reflecting or indicating receive further output from the sensor array and based on this Output in combination with the area-related total order Application medium on both sides of the web or the dependent thereof Size representing or reflecting or indicating output Control of the order or the commissioned works for both sides of the Material web in each case individually to the area-related individual order Application medium a predetermined or predetermined individual target is at least approximated.

According to the invention, a regulation of the area-related individual order is Application medium (possibly the line weight per page) possible on the basis of area-related total order to order medium on both sides, if necessary of the total stroke measured by conventional means, in combination with the Output of at least one other sensor based on area Single order to application medium on the assigned side of the material web and / or at least one of the area-related individual order Application medium on the associated side of the material web dependent property the material web responds and provides a corresponding output.

It comes in principle, a dedicated line weight sensor, the about in the infrared absorption method, the reflective line weight measures to use. You could possibly get by with a single sensor, the weight only intended for a web page. Opposite the design of the machine with two line weight sensors, which are each assigned to a material web side, There would be the advantage that only one sensor has to be calibrated. Out of the Basis of the measurement results of the sensor arrangement determined overall line and the single stroke measured for one side could then be the single stroke for the other web page be determined. On the other hand, it is preferable that the sensor on an area-specific order to order medium on the associated side of the material web dependent property of the web which is easier to measure than the line weight itself. It will for example, to the measurement of whiteness, luster or color of the Material web thought.

With regard to the machine according to the invention, it is proposed in a further development that the sensor arrangement in assignment to both sides of the material web respectively has at least one sensor that responds to the area-related Single order to application medium on the assigned side of the material web and / or at least one of the area-related individual order Application medium on the associated side of the material web dependent property the material web.

The control device may advantageously comprise a determination device which the at least one area-related total order to order medium both sides of the web or the size dependent thereon or reflecting or indicating output from the sensor array receives and on the basis of this output and a distribution relation of the area-related total order on the two sides of the material web the area-related individual orders Application medium for both sides of the web determined. Regarding that Procedure is proposed in this context that based on the at least one area-related total order to order medium both sides of the web or the size dependent thereon or reflecting or indicating output from the sensor array and one is a distribution relation of the area-related total order on the two Side of the material web representing division value the area-related Single orders of application medium for both sides of the web determined become.

The split value may again be a split ratio act in the sense of a quotient indicating "distribution factor", or by one the division of the area - related total contract between the two sides of the Material web in the sense of a difference indicating "distribution difference". Concerning a distribution ratio in the sense of a quotient Distribution value or "distribution factor", the possibility is also specifically considered that when changing the area-related total order to the two Pages in the course of the order the division ratio is kept constant. This possibility or proposal relates both to intended and also intrinsically unintentional changes in the area-related overall order on the two sides of the web.

After a preferred embodiment in this context of Control device includes these in association with the two sides of the web in each case at least one controller based on the. By the Determination unit for a given area-related individual contract for the respective Side of the material web by controlling the applicator or the side assigned job individually to the area-related individual order Application medium the predetermined or predetermined individual target at least approximates. Regarding the method is in this context suggested that for both sides of the web based on the certain area-related individual order for each page Control of the order unit or of the commissioned work assigned to the page individually the area-related single order to order medium the predetermined or predetermined respective individual target is at least approximated.

The division value may be predetermined, for example due to a Calibration or a setting at the beginning of the application. In contrast, it is in the machine according to the invention but preferred that the Determining device or another determination device of Regulating the area-related individual order to order medium the sensor associated side of the web or the dependent thereon Size representing or reflecting or indicating further output receives from the sensor array and based on this output the the Distribution ratio of the area - related total order to the two sides of the Material web representing distribution value determined. For the inventive method is proposed in this context that on the basis of the area related individual order to the order medium on the concerning side of the material web or the size dependent thereon representing or reflecting or indicating further edition of the Distribution ratio of the area - related total order to the two sides of the Material web representing distribution value is determined.

The machine can be designed so that for both sides of the web respective individual target for the area-related individual order to order medium is predetermined or specifiable. In this context, for the inventive method proposed that for both sides of the web the respective individual target for the area-related individual order Order medium is specified.

It is in this context concerning the machine in particular thought that the control of the Auftragwerks or the two Material web pages assigned commissioned by the two controllers for Approximation of area related individual orders to order medium to the predetermined or specifiable respective individual target the approximation of total area-based order to both sides of the contract Material web to the sum of the individual target corresponding total target results. In the implementation of the method, accordingly, the control of the Commissioned work or the commissioned works assigned to the two material web pages approximating the area related individual contracts to the order medium to the predetermined or specifiable respective individual target the approximation of total area order to order medium on both sides of the Material web to the sum of the individual target corresponding total target result. An additional regulation to approximate area-related Total order to the total target is therefore unnecessary. In particular, needs then not a total target is given in addition to the individual target, since this results directly from the individual target, namely in particular their Total corresponds.

Another possibility is that the machine is designed to do that Total target for the area-related single order to order medium is predetermined or specifiable. Regarding the procedure one can Accordingly, provide that the total target for the area-related Single order to order medium is specified.

Regarding the machine will be training in this context proposed that the or a determination device of the control device the respective individual target for the area-related individual order A job medium based on or a target sharing relationship of area-related total order on the two sides of the material web representing the distribution value. In the method can accordingly, the respective individual target for the area-related individual order to a job medium based on or a target sharing relation of area-related total order on the two sides of the material web representing the distribution value.

In this context, it is primarily thought that as the desired distribution ratio representing distribution value (if necessary, distribution factor or Division difference) one of the particular (in particular by the Determining means) distribution value to be discriminated is predetermined or can be specified or specified.

An expedient design of the machine is characterized by the fact that in Reference to at least one side of the web for at least one of area - related single order to order medium dependent property of Material web, on which the (respective) side of the material web assigned Sensor responds, a desired property or at least one desired relation to a another property of the material web is predetermined or predetermined. It will especially remembered that with respect to both sides of the web for at least one of the area related individual order to order medium on the respective side dependent property of the web to which the respective Side of the material web associated sensor responds, a desired property or at least one desired relation to another property of the material web or a target relation between the area-related individual order Job medium dependent property with respect to the one side of the Material web and the area-related individual order to order medium dependent property with respect to the other side of the material web or is specifiable.

With regard to the method according to the invention, it is accordingly proposed with respect to at least one side of the web for at least one of area - related single order to order medium dependent property of Material web, on the at least one of a respective side of the web associated sensor of the sensor arrangement responds, a desired property or at least one desired relation to another property of the material web is given. It is especially thought that in terms of both sides the material web for at least one of the surface-related individual order Application medium on the respective side dependent property of the web, on the at least one of the respective side of the material web associated sensor responds to a desired property or at least one desired relation to another Property of the material web or a desired relation between the of area-related single order to order medium dependent property in Reference to the one side of the web and the surface-related Single job to job medium dependent property with respect to the other Side of the web is specified.

One possibility for the design of the control device in this Related is that these are in association with the two sides of the web each comprises at least one controller based on the predetermined desired property or target relation and the area-related individual order Application medium respective side of the web or the dependent thereof Property representing or reflecting or indicating further Output by activation of the client or of the page assigned Order in relation to the area-related individual order Application medium, the detected by the respective sensor property of predetermined or predefinable target property or a fulfillment of the at least approximates predetermined or predefinable setpoint relation. For the inventive method is proposed in this context that based on the predetermined desired property or desired relation and the area - related individual order to the order medium of the page in question Material web or the property dependent on or representing reflecting or indicating further output by triggering the Auftragwerks or assigned to the page commissioned work in relation to the area-related individual order to the order medium by the respective Sensor detected property of the predetermined or specifiable target property or a fulfillment of the predetermined or predefinable target relation at least is approximated.

According to another advantageous embodiment of the control device has this in association with both sides of the material web at least a first and at least a second controller, which together directly or indirectly the Control the commissioned work or the commissioned works. It is envisaged that the first controller based on the total target for the area-related Single order to order medium and the area-related total order Application medium on both sides of the web or the dependent thereof Size representing or reflecting or indicating output at least an approximation of the area-related overall order Application medium on both sides of the web to the given or predeterminable overall target and that the second controller based on the Target property or setpoint properties or setpoint relation or setpoint relations and the area-related individual order to the order medium of the relevant Side of the material web or the property dependent thereon or reflecting or indicating further output, at least one Approximation of the detected by the at least one sensor or the sensors Property to the predetermined or predefinable target property or to a Fulfillment of the predetermined or specifiable setpoint relation provides. In this In connection, it is particularly preferred that the control device a Drive means comprises, based on at least a first Control output (possibly command value) of the first controller and at least one second control output (possibly reference variable) of the second controller the commissioned work or the commissioned works in the sense of a division of one by the first Rule (reference) provided on both sides of the Material web related total order on two only one on each side the material web related individual orders in accordance with the second Standard output (reference variable).

For the inventive method is in this context proposed that based on the total target for the area-related Single order to order medium and the area-related total order Application medium on both sides of the web or the dependent thereof Size representing or reflecting or indicating output at least an approximation of the area-related overall order Application medium on both sides of the web to the given or predetermined total target is effected by outputting at least a first Rule output (if necessary, reference variable) and at the same time based on the target property or setpoint properties or setpoint relation or setpoint relations and the the area related individual order to the order medium of the page in question Material web or the property dependent on or representing reflecting or indicating further output at least an approximation the property detected by the at least one sensor or the sensors the predetermined or predefinable target property or to a fulfillment of predetermined or predetermined target relation is effected by output at least one second control output (possibly reference variable). It will be in this Context especially remembered that based on the first Control output (reference variable) and the second control output (reference variable) the commissioned work or the commissioned works is / are controlled in the sense of a Distribution of one provided by the first rule issue, on both sides the material web related total order on two only one each Page of the material web related individual orders in accordance with the second Control output.

It was mentioned that the sensor arrangement at least two May include basis weight sensors. It will be in this context all thought that of the basis weight sensors at least one Basis weight of the material web before application and at least one other the basis weight of the material web after being applied to both sides, and that one determining means is adapted to be selected from Basis weights before and after application of area-related Total order of application medium on both sides of the material web, in particular to determine the total weight. The method can accordingly Step include that from the basis weights before and after application of the area-related total order to order medium on both sides of the Material web, in particular the total line weight is determined.

Furthermore, as has already been mentioned, the sensor arrangement in Assignment to at least one of the sides of the material web, preferably in Assignment to both sides of the web (each) at least one in particular optically reflective on the area-related individual order Application medium on the associated side of the web or / and on at least one of area related single order to order medium on the associated side of the material web dependent property of the material web responsive sensor, especially gloss sensor or color sensor or white sensor, include.

According to a preferred embodiment of the machine, a / can Determining device designed to be a relation, in particular a Difference or a relationship between one on one side of the Material web relate, the area-specific order Application medium on this side of the material web dependent property of Material representing size and one on the other side of the Material web relate, the area-specific order Application medium on this side of the material web dependent property of Determine material web representing sizes, possibly a white ratio or Gloss ratio or a white difference or gloss difference. For the inventive method is proposed in this context that a relation, in particular a difference or a relation, between oneself referring to the one side of the web, the surface-related Single order to order medium dependent on this material web page Property of the material web representing size and one on the refer to other side of the web, the surface-related Single order to order medium dependent on this material web page Property of the material web representing size is determined, if necessary White ratio or gloss ratio or a white difference or gloss difference.

Regarding the regulation, it is particularly preferable for each page to be separate Target-value-actual-value comparison for the line weight is performed. A Deviation between the desired value and the actual value can be used as input for a conventional control variable to be adjusted by an operator, for example, about contact pressure, pumping rate, flow rate, serve. Preferred is a automated regulation, so that for each page the desired line weight is set automatically.

Fig. 1

zeigt ein Beispiel für die seitenbezogene Strichgewichtsermittlung auf Grundlage eines Aufteilungs- oder Splitwerts.

Fig. 2

zeigt in Kombination mit Fig. 3a ein erstes Ausführungsbeispiel sowie in Kombination mit Fig. 3b ein zweites Ausführungsbeispiel für eine seitenbezogene Strichgewichtsregelung auf Grundlage des Aufteilungs- oder Splitwerts.

Fig. 3

zeigt in der Teilfigur 3a die seitenbezogene Strichgewichtsregelung auf Grundlage eines ermittelten Ist-Einzel-Strichgewichts für die jeweilige Materialbahnseite sowie auf Grundlage eines Soll-Gesamtstrichs und in Teilfigur 3b die seitenbezogene Strichgewichtsregelung auf Grundlage eines ermittelten Ist-Einzel-Strichgewichts für die jeweilige Materialbahnseite sowie auf Grundlage eines jeweiligen Soll-Einzel-Strichgewichts.

Fig. 4

zeigt schematisch eine Möglichkeit, wie der Aufteilungs- oder Splitwert durch Messungen an der beidseitig gestrichenen Materialbahn bestimmt werden kann, und zwar beim Ausführungsbeispiel speziell auf Grundlage einer Glanz-Differenz.

Fig. 5

zeigt eine Abwandlung der Bestimmung des Aufteilungs- oder Splitwerts auf Grundlage einer normierten Glanz-Differenz anstelle einer unnormierten Glanz-Differenz.

Fig. 6

dient zur Veranschaulichung von Verallgemeinerungen gegenüber den Bestimmungen des Aufteilungs- oder Splitwerts gemäß Fig. 4 oder 5, bei der allgemein auf Grundlage von Messergebnissen an den beiden gestrichenen Materialbahnseiten und Relationen zwischen diesen der Aufteilungs- oder Splitwert bestimmt wird.

Fig. 7

zeigt ein weiteres Beispiel für eine seitenbezogene Strichgewichtsregelung auf Grundlage eines gemessenen Gesamtstrichs und weiteren, an beiden Seiten der gestrichenen Materialbahn gemessenen Materialbahneigenschaften.

The invention will be explained in more detail below with reference to embodiments shown in the figures.

Fig. 1

shows an example of the page-based bar weight determination based on a split or split value.

Fig. 2

3 a shows a first exemplary embodiment in combination with FIG. 3 a and, in combination with FIG. 3 b, a second exemplary embodiment for a page-related bar weight control on the basis of the split or split value.

Fig. 3

shows in the sub-figure 3a, the page-based bar weight control based on a determined actual single-line weight for the respective material web page and on the basis of a target overall stroke and in part 3b, the page-based bar weight control based on a determined actual single line weight for the respective material web page and on Basis of a respective nominal single line weight.

Fig. 4

shows schematically a way in which the division or split value can be determined by measurements on the material web coated on both sides, specifically in the exemplary embodiment based on a gloss difference.

Fig. 5

Figure 12 shows a modification of the determination of the split or split value based on a normalized gloss difference instead of an unnormalized gloss difference.

Fig. 6

serves to illustrate generalizations against the provisions of the division or split value according to FIG. 4 or 5, in which the distribution or split value is generally determined on the basis of measurement results on the two coated material web pages and relations between them.

Fig. 7

shows another example of a page-based bar weight control on the basis of a measured overall line and further material web properties measured on both sides of the coated material web.

According to Fig. 1, a paper web 10 on both sides with application medium 11o or 11u, in particular coating color, coated. The order is carried out by means of a on both web pages acting applicator 12 or alternatively by means two commissioned works 12a and 12b each assigned to one material web side. The Coating amount on the respective material web side can by suitable Adjustment parameters are regulated, for example via a doctor pressure P or a pumping amount Q.

By means of two basis weight sensors 14 and 16, which detect the basis weight, for example, by the extinction of radioactive radiation in transmission through the material web, the total coating amount on both sides of the web, namely the so-called total line weight, can be determined. For this purpose, in the running direction L of the material web, in particular paper web or board web, the first sensor 14 in front of the commissioned work 12 or the commissioned works 12a, 12b and the second sensor 16 after the commissioned work 12 or the commissioned works 12a, 12b. The first sensor detects the basis weight M _raw in the raw state, ie in the non-coated state of the material web, and the second sensor detects the total basis weight M _{tot of} the material web in the coated and preferably already dried state. From the raw basis weight and the total basis weight, it is possible to determine the total coating quantity, ie the total line M _{S, by} subtraction. The total line M _S can be determined by a determination unit 20 of signals from the two sensors. This total line M _S corresponds to the sum of the present, by the sensors 14 and 16 not directly detectable coating amounts (line weights) M _{S, O} for the material web top side and M _{S, U} for the material web underside.

From the total line M _S thus determined, a further determination unit 22 determines the individual line weights M _SO and M _{s, U} , based on a division or split value K, which is predetermined, for example, stored in a memory unit 24, or by a the partitioning or split determining determining unit 26 is provided. The reference numerals 24 and 26 are to be understood as alternatives in this respect.

The division or split factor K, in the following without limitation of the Generality also briefly referred to as split factor K, can be used in the calculation of Single order quantities, especially single weights, one possibly consider asymmetrical division. As far as the split factor is not specified is based, for example, on a calibration or at the beginning of correct stroke distribution, the split factor may be useful via correlation with other paper data, e.g. B. Paper gloss or paper whiteness, to be determined.

To illustrate the Fig. 1 is still nachzutragen that two dashed Cutting lines S symbolize that between the commissioned work 12 and the commissioned works 12a and 12b and the total basis weight after the Applying detecting sensor 16 quite a larger distance or a larger, can be provided by the material web 10 zurückzulegende guide section. For example, the web could go through a drying arrangement, before it reaches the sensor 16.

Based on the determined according to FIG. 1 single-line weights can be advantageous a regulation by the commissioned work 12 or the commissioned works 12a and 12b Applied single line weight for both web pages done. Fig. 2 shows in combination with Fig. 3a a first embodiment and in combination with Fig. 3b shows a second embodiment of such a weight control. The Markings B1 and B2 and A1 and A2 indicate the relationship between 2 and Fig. 3a and the relationship between FIG. 2 and FIG. 3b and can, for example, as names of terminals or the like.

According to Fig. 3a is a total line weight M _{S, should be} specified. A storage unit storing this desired value is designated 30. By means of a determination unit 32, a target line weight value M _{S, O, soll} for the upper material web side and M _{S, U, soll} for the lower material web side is determined from the total desired value for both material web sides, in accordance with a split or split value K, also referred to below without restriction of generality as a split factor K. It is quite possible that it is the same division or split value K, the basis of the determination of the individual line weights M _{S, O} and M _{S, U} , the actual values, by the determination unit 22. In contrast, it is preferred that in the determination by the determination unit 32 certain division of the total setpoint M _{S, should} in the individual setpoints M _{S, O, should} and M _{S, U, soll} by the determination unit 32, another distribution or Split factor is received, in particular simply a predetermined desired division or split value K _soll (desired split-factor), as indicated in Fig. 3a additionally in parentheses. In this case, this setpoint value can be stored in a memory unit 34 and supplied by it to the determination unit 32.

The determination unit 32 supplies the individual setpoint values M _{S, O, soll} and M _{S, U, soll to} a control device 40 or 42 associated with the material web upper side or the material web underside, which in FIG. 3 a is respectively guided by the comparison or subtraction element 40 or 42 symbolizes. The control devices or the difference-forming member receives from the determination unit 22 the upper or lower coating weight actual value M _{S, O} or M _{S, U.} An output from a respective control element reference variable X is _O or X _U is supplied to the application unit 12 and to the respective application unit 12a, 12b to the respective coat weight to approach the target value, in particular the coating weight on the regulate target value.

3a, the embodiment according to FIG. 3b differs from the embodiment according to FIG. In the illustrated embodiment alone the fact that not the total coating weight M _{S soll,} and an associated target splitting or split value K _{is to} be determined, but directly the desired -Single-line weights M _{S, O, soll} and M _{S, U, soll} .

The page weight control can also be done as follows. The difference of the measured basis weights M _ges and M _raw gives the total line weight as the actual value, ie the total line weight, which is currently being applied. This instantaneous value _is compared in a computer program with the desired target value M _{S, soll} , ie the desired total line weight. In this case, a possible deviation between the instantaneous actual value and the desired nominal value is calculated. Based on this, the deviation between the actual and desired values with respect to the material web top and the web bottom side is calculated on the basis of the split or split value K, which ensures that adjustments in the metering dosage are always in the same ratio between material web top side and bottom side Material web base are made. It can be provided that an adaptation only follows if the calculated deviation exceeds a set tolerance value.

It can according to the above in a simple way continuously from the measurement the basis weights of the material web before and after application a scheme the weights per page are realized. It can by means of Split or split value K a certain split between Material web top and material web base are set. This allows in particular the compensation of a certain two-sidedness of Raw paper or cardboard. Additional sensors for measuring line weight per material web page are not necessary according to this approach. you can with a given or preset, possibly from a Calibration or correct adjustment at the beginning of the order resulting Split or split value K work.

A particularly preferred embodiment of the embodiments and in general the machine according to the invention or the method according to the invention sees In contrast, that in the determination of single-weight weights for the two Material web pages incoming division or split value K itself also on Basis of referring to the web after application Measurement results is determined. Fig. 4 shows a corresponding Embodiment, in addition to Fig. 1 and Fig. 2 in conjunction with Fig. 3rd is referenced. There are additional sensors 50 and 52 to the sensors 14 and 16 added, with respect to both coated web pages each a weight-dependent material web property, for example the Gloss or the whiteness of the web, measure. The detection of such specific material web properties of the respective material web page can for be used, the detected by means of the sensors 14 and 16 total stroke actual value divided into the page-related single line weights (actual values).

For example, one can proceed in such a way that a deviation of the Surface properties between top and bottom with a momentary underlying split or split value. This can then be like that be adjusted that the deviation in the material web property between Top and bottom, about in gloss or in the whiteness, minimized or become approaches a target value.

With reference to the exemplary embodiments of FIGS. 1, 2 with FIGS. 3 a and 2 with FIG. 3 b, it can be provided, for example, that the division or split value K supplied to the determination unit 22 is represented by the arrangement shown schematically in FIG 26 is determined. From a gloss value G _O determined by the gloss sensor 50 assigned to the upper material web side and a gloss value G _U determined by the gloss sensor 52 assigned to the lower material web side, a gloss difference ΔG (t) is determined by a difference formation unit 54. In an evaluation unit 56 receiving the gloss difference value, an instantaneous split or split value K (t) is assigned to the gloss difference value, for example on the basis of a previously stored characteristic curve or a previously stored characteristic map or on the basis of a previously stored assignment function.

Assuming that the same coating weight is provided for both material web sides and accordingly both material web sides should shine the same, a difference value ΔG> 0 results in a split or split value <1 and results in a split or split value from a difference value ΔG <0 K> first Both web pages to the same gloss, the result of the difference value ΔG = 0 and therefore a splitting or split value K = 1, so that the single-coat weights M _{S, O} and M _{S, U} half the total coating weight M _S respectively correspond.

It should be noted that the material web after passing through the sensors 50 and 52 is supplied, for example, a reel.

A variant for the division or split value determination K on The basis of gloss measurements is shown in FIG. Instead of Difference-forming unit 54 is a difference-forming and normalizing unit 54 '. provided that a normalized to the average gloss difference Δ (t) determined by the unit 56 'in principle in the same way as is evaluated by the unit 56 to the current distribution or To provide split value K.

For gloss measurement, it should be noted that this is prior art in itself. The same applies to a basically also possible white measurement or color measurement. In a gloss measurement, for example, by means of a reflectometer the reflected light from the surface in a limited by aperture Angular range can be measured in its intensity. Preference is given to several, For example, three Einstrahlwinkel and thus measuring ranges used to one Switch off the dependence of the reflectometer value on the angle of incidence or at least minimize. For example, a white measurement may be based on a comparison of the light reflection between the surface to be measured and a whitening standard serving as white standard. Corresponding sensors and sensor arrays are from different suppliers, for example ABB Automation and Lehmann Mess-Systeme AG, available.

6 represents a generalization of the determination of the division or split value K on the basis of properties of the material web which are dependent on the respective coating weight. The material web 10 having coating application 11 _O or 11 _U on both sides passes through an upper sensor arrangement 50 'and a lower sensor arrangement 52', which provide measurement results S _{o, i} and S _{U, i} . In a determination unit 54 ", at least one secondary quantity T _{i is determined} from at least one measurement result S _{O, i} relating to the upper material web side and at least one measurement result S _{U, i} , for example a ratio, relating to the lower material web side a secondary variable O _{i, J} from at least two measurement results S _{O, i} and S _{O, j} or / and at least one secondary quantity U _{i, j} relating to the upper material _{web side} from at least two measurement results S _{U, i} related to the lower material web side and S _{U, j} . On the basis of one or more of the addressed secondary variables or - alternatively - based on the measurement results S _{O, i} and S _{U, i} itself determines the evaluation unit 56 "based on stored characteristic curves or maps or a stored assignment function the currently applicable division or split value K, then then, for example, the unit 22 of FIG. 1 or Fig. 2 is supplied.

It should also be pointed out that, based on the invention, it is advantageous to provide a given or desired division of the total line weight onto the individual line weights M _{S, O} and M _{S, U} in the sense of a given or desired division ratio M _{S, O} / M _SU keep constant or can selectively vary according to a desired course, especially in a desired or occurring change in the total line weight M _S = M _{S, O} + M _{S, U.}

Fig. 7 shows an overall system for a page-related coating weight control Basis of the recorded total stroke and recorded gloss values of the coated Web. For the same or analogous components are related to the Embodiment of Fig. 7, the same reference numerals as for the vorangehend explained embodiments used, and there are only changes explained with respect to the previously explained embodiments. Otherwise, explicit reference is made to the comments above.

There are two again each represented by a subtraction element or comparator 60 and 62 control devices provided. The control device 60 receives the total stroke value prepared on the basis of the measurement results from the sensors 14 and 16 by the difference forming unit 20 detected _S M, with a predetermined desired value _{S M,} is compared _to. The desired value can be stored in a memory unit 64. The comparison results in a reference variable X _S relating to the total line, which is provided by a control element of the control device 60.

The control device 62 receives from the differentiating and normalizing unit 54 'the normalized gloss difference Δ, which _is compared with a predetermined desired value Δ _soll . The desired value can be stored in a memory unit 66. From the comparison results in a reference variable X _Δ , which is provided by a control element of the control device 62.

The reference variables X _S and X _Δ control the application unit 12 or the commissioned units 12 a and 12 _b via a drive device 70 with regard to the page-related coating order. For this purpose, the driving means 70 provides an relating to the order on the upper material web page reference variable X is _O and one relating to the order on the lower material web page command value X _U to be supplied to the application unit or on the applicators. If one starts from a linear relationship between the respective reference variable and the resulting total line weight or single line weight (the control elements and the actuating devices of the commissioned unit or the commissioned units controlled by them can be designed accordingly without further ado), then one can provide in that the reference variables X _O and X _U which directly determine the application on the upper or lower material web side are additive or subtractive from the reference variable X _S relating to the overall order and the reference variable X relating to the division of the overall order onto the two material web _{pages Δ} .

There are still many embodiments of the page-related line weight control possible. For example, a zone-by-zone rule for achieving or at least to approximate a desired transverse profile of the respective line weight be provided. In terms of gloss measurement, you can instead of a Difference formation (normalized or unnormalized) can also provide a quotient formation. As already mentioned with reference to FIG. 6, one can also make several measurements each combine for the top and bottom of the web, wherein in addition to difference formations and quotient formations, also casual others, the Measured values can be used in relationship-setting functions.

The gloss measurement or whiteness measurement or other measurement with respect to the material web top and the material web underside can take place close to or at the tambour in the material web rewind station. Another possibility is a measurement online on the measuring frame, where, for example, the total basis weight M _{tot is} measured.

For a particularly fast control, one can measure the total basis weight or / and gloss or at least one other, depending on the applied application medium property directly after the commissioned work or after the commissioned works, possibly even before a drying arrangement. In this case, dependencies of the total weight per unit area M _ges or the detected side-related material web property (such as whiteness or gloss) of the moisture contained in the application medium can also be taken into account in the control.

Claims (43)

A machine for applying a liquid or pasty application medium on both sides by means of at least one applicator (12; 12a, 12b) to a moving material web (10), in particular of paper or cardboard, with a sensor arrangement (14, 16) which responds to the area-related overall order Application medium on both sides of the material web (10) and / or on at least one dependent on the area-related total order of application medium on both sides of the material web size, characterized by a sensor device connected to the determination device (20, 22), the at least one area-related total order of application medium receives (M _Roh , M _ges ) from the sensor assembly (14, 16) on both sides of the web or the size dependent therefrom, and based on this output and a split relation of the area-related total job on the two sides of the material base hn representative division value (K) determines the area-related individual orders (M _{S, o} , M _{S, u} ) of application medium for both sides of the material web. Machine according to Claim 1, characterized in that the sensor arrangement (14, 16, 50, 52; 14, 16, 50 ', 52') has at least one sensor (50, 50, 50 ', 52') assigned to one of the sides of the material web. which responds to the area-related individual order of application medium on the associated side of the material web and / or on at least one of the area-related single order application medium on the associated side of the material web dependent property of the material web. Machine according to claim 1, characterized in that the sensor arrangement (14, 16, 50, 52, 14, 16, 50 ', 52') in each case at least one sensor (50, 50, 50 ', 52nd) is assigned to both sides of the material web '), which responds to the area-related individual order to order medium on the associated side of the web or / and on at least one of the surface-related single order to order medium on the associated side of the material web dependent property of the web. Machine according to claim 2 or 3, characterized in that the determining device or a further determining device (26) of the control device determines the surface-related individual application to application medium on the side of the material web assigned to the sensor (50; 50; 50 ';52') or the thereof dependent output representing or reflecting or indicating further output (G _O , G _U , S _{O, i} , S _{U, i} ) from the sensor arrangement and, based on this output, the division value representing the division relation of the area-related total order on the two sides of the material web ( K). Machine according to one of Claims 1 to 4, characterized by at least one control device (20, 22, 40, 42) comprising the determining device (20, 22), which carries the at least one area-related overall order of application medium on both sides of the material web or the thereof dependent output representing or reflecting or indicating output (M _raw , M _tot ) from the sensor arrangement (14, 16) receives and based on this output the area-related total order (M _S ) of application medium on both sides of the material web by driving the at least one applicator one predetermined or predetermined total target at least approximates. Machine according to claim 5, characterized in that the at least one applicator (12) allows for both sides of the web an individual adjustment of the area-related individual order of application medium or that the two sides of the web in each case at least one own, the individual adjustment of the area-related individual order of application medium assigned to the respective side of the web permitting applicator (12a or 12b), and that the control device (20, 22, 40, 42) in association with the two sides of the web in each case comprises at least one controller (40 or 42), the area-related individual order to the application medium, determined on the basis of the area-related individual order (M _{S, o} or M _{S, u} ) determined by the determining unit (20, 22) for the respective side of the material web by activation of the applicator or the applicator assigned to the page a predetermined or predetermined individual At least approach. Machine for applying a liquid or pasty application medium on both sides by means of at least one applicator unit (12, 12a, 12b) to a moving material web (10), in particular of paper or cardboard, with a sensor arrangement (14, 16, 50, 52; 14, 16, 50 ', 52') which responds to the area-related overall order of application medium on both sides of the material web (10) or / and at least one size dependent on the area-related total order of application medium on both sides of the material web, and with at least one control device (40, 42, 60, 62) receiving at least one output (M _Raw , M _tot ) representing the area-related overall order of application medium on both sides of the web or the size dependent thereon and receiving the area-related total order on the basis of this output (M _S ) to application medium on both sides of the web by controlling the at least at least approximates a job to a predetermined or predefinable total target,
characterized in that the at least one applicator (12) for both sides of the web permits individual adjustment of the area-related individual order of application medium or that the two sides of the web in each case at least one own, the individual setting of the area-related individual order of application medium for each page Material web permitting commissioned work (12a or 12b) is assigned,
in that the sensor arrangement has at least one sensor (50, 52; 50 ', 52') assigned to one of the sides of the material web, which responds to the area-related individual order of application medium on the associated side of the material web or / and to at least one of the area-related individual order of application medium on the associated side of the material web dependent property of the web, and
in that the control device (40, 42; 60, 62) comprises at least one further output (G _O , G _U ; S _{O, i} ...) relating to the area-related individual order to application medium on the side of the material web assigned to the sensor or the property dependent thereon or reflecting thereon , S _{U, i} ) receives from the sensor arrangement and based on this output in combination with the area-related total order of application medium on both sides of the web or the size dependent on or reflecting or indicating output (M _raw , M _tot ) by driving the Auftragwerks or the commissioned works for each side of the web in each case individually the area-related individual order to order medium at least a predetermined or predetermined individual target. Machine according to claim 7, characterized in that the sensor arrangement in assignment to both sides of the material web in each case at least one sensor (50 or 52, 50 'or 52') which responds to the surface-related single order application medium on the associated side of the web and / or at least one of the surface-related individual order to order medium on the associated side of the material web dependent property of the web. Machine according to claim 7 or 8, characterized in that the control device comprises a determination device (20, 22), the at least one the area-related total order of application medium on both sides of the material web or the size dependent on or reflecting or indicating output (M _Roh , M _tot ) receives from the sensor arrangement and based on this output and a division value (K) representing a distribution ratio of the area-related total order on the two sides of the material web, the area-related individual jobs (M _{S, o} , M _{s, u} ) to application medium for both sides the material web determined. Machine according to claim 9, characterized in that the control device in association with the two sides of the material web in each case comprises at least one controller (40 or 42), which on the basis of determined by the determining unit area-related individual order (M _So or M _{S, u} ) for the respective side of the material web by controlling the applicator or assigned to the side of commissioned work individually the area-related individual order to order medium the predetermined or specifiable respective individual target at least approximates. Machine according to claim 9 or 10, characterized in that the determining device or a further determining device (26) of the control device the surface-related individual order of application medium on the sensor (50, 52; 50 ', 52') side of the material web or the thereof dependent output representing or reflecting or indicating further output (G _O , G _U , S _{O, i} , S _{U, i} ) from the sensor arrangement and, based on this output, the division value representing the division relation of the area-related total order on the two sides of the material web ( K). Machine according to one of claims 7 to 11, characterized in that for each side of the material web, the respective individual target (M _{S, O, S,} M _{S, u, soll} ) is predetermined or predetermined for the area-related individual order to order medium. Machine according to claim 12, at least referring back to claim 20, characterized in that the control of the applicator or the two web pages associated applicators by the two controllers (40, 42) for approximating the area-related individual orders of application medium to the predetermined or predetermined individual -Should the approximation of the area-related total order to the order medium on both sides of the material web result in the sum of the individual target values corresponding total target. Machine according to one of claims 7 to 12, characterized in that the total target (M _{S, soll} ) for the area-related individual order given to order medium or predetermined. Machine according to claim 14, characterized in that the or a determination device (32) of the control device the respective individual target (M _{S, o, should} , M _{S, u, soll} ) for the area-related single order to order medium based on one or the one target allocation relation of the area-based total job representing the two sides of the web division value (K; K _soll) determined. Machine according to Claim 15, characterized in that a desired distribution value (K _soll ) to be distinguished from the distribution value determined by the determining device is predetermined or predeterminable as the distribution value representing the desired distribution ratio. Machine according to claim 7 to 14, characterized in that with respect to at least one side of the material web for at least one depending on the area-related order to order medium dependent property of the material web to which the (respective) side of the material web associated sensor responds Target property or at least one desired relation to another property of the material web is predetermined or predetermined. Machine according to one of claims 7 to 14, at least referring back to claim 8, characterized in that with respect to both sides of the material web for at least one of the area-related single order of application medium on the respective side dependent property of the material web to which the respective side of the Material web associated sensor (50, 52) responsive, a desired property or at least a desired relation to another property of the material web or a desired relation (Δ _soll ) between the surface-related individual order to order medium dependent property with respect to the one side the material web and the property dependent on the surface-related individual order of the application medium is predefined or predefinable with respect to the other side of the material web. Machine according to claim 17 or 18, characterized in that the control device in association with the two sides of the material web in each case comprises at least one controller based on the predetermined desired property or desired relation and the area-related individual order of application medium respective side of the web or the further output representing or reflecting or indicating this by triggering the applicator or the applicator assigned to the page with respect to the area-related individual order to application medium the property of the predetermined or predefinable desired property or a fulfillment of the property detected by the respective sensor at least approximates predetermined or predefinable setpoint relation. Machine according to claim 17 or 18, at least referring back to claim 8, characterized in that the control device in association with both sides of the material web comprises at least a first controller (60) and at least one second controller (62), which together directly or indirectly the commissioned work (12) or the commissioned works (12a, 12b) control, wherein the first controller (60) on the basis of the total target (M _{S, should} ) for the area-related individual order to order medium and the area-related total order to order medium on both sides of Material web or the output dependent therefrom or reflecting or indicating output (M _raw , M _tot ) at least one approximation of the area-related total order (M _S ) of application medium on both sides of the material web to the predetermined or predetermined total target (M _{S, soll} ) and wherein the second controller (62) is based on the desired characteristic or desired rel ation (Δ _soll ) or desired relations and the further output (G _O , G _U ) representing the area-related individual order to the application medium of the respective side of the material web or the property dependent thereon or reflecting this is at least approximated by the at least one sensor or sensor The sensor provides detected property to the predetermined or predefinable desired property or to a fulfillment of the predetermined or predefinable desired relation (Δ _soll ). Machine according to claim 20, characterized in that the control device comprises a drive device (70) which is based on at least a first control output (X _S ) of the first controller (60) and at least a second control output (X _Δ ) of the second controller (62). the commissioned work or the commissioned works in the sense of a division by the first control output (X _S ) provided, related to both sides of the web total order on two only on one side of the material web related individual orders in accordance with the second control output (X _Δ ). Machine according to one of claims 1 to 21, characterized in that the sensor arrangement comprises at least two basis weight sensors (14, 16), of which at least one of the weight per unit area (M _raw ) of the material web before application and at least one other, the basis weight (M _tot ) the material web detected after application to both sides, and that one / the determining means (20) is adapted from the area Weights before and after application the area-related total order of application medium on both sides of the web, in particular the total line weight (M _S ). Machine according to one of claims 1 to 22, characterized in that the sensor arrangement in association with at least one of the sides of the material web, preferably in association with both sides of the material web, (respectively) at least one in particular optically reflective on the surface-related individual order on application medium the associated side of the material web and / or at least one sensor (50, 52, 50 ', 52'), in particular a gloss sensor (50, 52), which responds to the property of the material web depending on the area-related individual application to the application medium Color sensor or white sensor, includes. Machine according to one of claims 1 to 23, at least referring back to claim 3 or 8, characterized in that one / the determining means (54; 54 '; 54 ") is adapted to a relation, in particular a difference or ratio, between a referring to the one side of the material web, the size of the material web dependent on the area-related individual order of the application medium on this side of the material web and a size related to the other side of the web, depending on the area-related order to order medium on this side of the web dependent property to determine the size of the web, optionally a whiteness ratio or gloss ratio or a whiteness difference or gloss difference (ΔG; Δ). Method for determining area-related individual jobs to application medium when applying a liquid or pasty application medium on both sides by means of at least one applicator (12; 12a, 12b) on a moving material web (10), in particular of paper or cardboard,
in which at least one output (M _raw , M _tot ) representing the area-related total order of application medium on both sides of the material web or a size dependent thereon is received by a sensor arrangement (14, 16) and based on this output and a distribution relation of the area-related total order on the division value (K) representing the two sides of the material web, the surface-related individual orders (M _{S, o} , M _{S, u} ) of the application medium for both sides of the material web are determined. Method according to claim 25, characterized in that at least one further output (G _O , G _U , S _{O, i} , S _{U, i} ) representing the area-related individual order of application medium on one side of the material web or a size dependent thereon or reflecting or indicating it. is received from the sensor array and determined based on this output of the division ratio (K) representing the division relation of the area-related total order on the two sides of the web. Method for applying a liquid or pasty application medium on both sides by means of at least one applicator unit (12, 12a, 12b) to a moving material web (10), in particular of paper or cardboard,
at least one output from a sensor arrangement (14, 16, 50, 52, 14, 16, 50 ', 52') representing the area-related overall order of application medium on both sides of the material web or a size dependent thereon or reflecting or indicating it Basis of this edition of the area-related overall order (M _S ) of application medium on both sides of the material web is at least approximated by triggering the at least one applicator a predetermined or predetermined total target,
characterized in that at least one further output (G _O , G _U ; S _{O, i} , S _{U, i} ) representing the area-related individual order of application medium on one side of the material web or a property dependent thereon or reflecting it is received by the sensor arrangement and in combination with the area-based total order representing the application medium to both sides of the material web or, dependent on size, or re-reflective or indicative of output (M _raw, M _tot) on the basis of this output by driving the applicator or the applicators for both sides of the material web in each case individually, the area-related individual order to order medium is at least approximated to a predetermined or specifiable respective individual target. A method according to claim 27, characterized in that on the basis of the at least one area-related total order of application medium on both sides of the web or the size dependent or reflecting or indicating output (M _raw , M _tot ) of the sensor array and a division ratio of the area-related total order on the two sides of the material web representing distribution value (K) the area-related individual orders (M _{S, o} , M _{S, u} ) are determined to order medium for both sides of the web. A method according to claim 28, characterized in that for both sides of the web on the basis of the specific area-related individual order (M _{S, o} , M _{S, u} ) for the respective page by driving the applicator or assigned to the page commissioned work individually the area-related individual order An order medium is at least approaches the predetermined or predetermined individual target. A method according to claim 28 or 29, characterized in that on the basis of the surface-related individual order to order medium on the side of the material web or the size dependent on or reflecting or indicating further output (G _O , G _U ; S _{O, i} , S _{U, i} ) of the division ratio of the area-related total order on the two sides of the material web representing division value (K) is determined. Method according to one of claims 27 to 30, characterized in that for each side of the web, the respective individual target (M _{S, o, should} , M _{S, u, soll} ) is specified for the area-related individual order to order medium. The method of claim 31, at least in relation to claim 29, characterized in that the control of the applicator or the two web pages associated applicators to approximate the area-related individual orders to order medium to the predetermined or specifiable respective individual target approximation of the area-related total order to order medium on both sides of the material web to the sum of the individual target corresponding total target results. Method according to one of claims 27 to 31, characterized in that the total target (M _{S, soll} ) is specified for the area-related individual order to order medium. A method according to claim 33, characterized in that the respective individual target (M _{S, o, should} , M _{S, u, soll} ) for the area-related individual order to order medium based on or a target distribution relationship of the area-related total order on the two Pages of the material web representing division value (K; K _soll ) is determined. A method according to claim 34, characterized in that one to be distinguished from the certain division value of set division value (K _req) is set as the target allocation relation representing allocation value. A method according to any one of claims 27 to 33, characterized in that with respect to at least one side of the material web for at least one depending on the area-related order to order medium dependent property of the material web to which at least one of a relevant side of the material web associated sensor of the sensor arrangement responds, a desired property or at least one desired relation to another property of the material web is specified. Method according to one of claims 27 to 33, characterized in that with respect to both sides of the material web for at least one of the surface-related single order of application medium on the respective side dependent property of the material web, on the at least one of the respective side of the material web associated sensor (50 , 53), a desired property or at least one desired relation to another property of the material web or a desired relation (Δ _soll ) between the surface-related individual order to application medium dependent property with respect to the one side of the web and from area-related individual order to order medium dependent property with respect to the other side of the material web is given. A method according to claim 36 or 37, characterized in that on the basis of the predetermined desired property or desired relation and the area-related individual order to order medium of the relevant side of the web or the property dependent on or reflect or indicating further output by controlling the applicator or of the commissioned work associated with the page in relation to the area-related individual order to order medium, the property of the predetermined or specifiable desired property or a fulfillment of the predetermined or predefinable desired relation detected by the respective sensor is at least approximated. A method according to claim 36 or 37, at least referring back to claim 33, characterized in that on the basis of the total target (M _{S, soll} ) for the area-related individual order to order medium and the area-related total order of application medium on both sides of the web or the thereof dependent size or reflecting or indicating output (M _raw , M _tot ) at least one approximation of the area-related total order (M _S ) to application medium on both sides of the material web to the predetermined or predefinable total target is effected by outputting at least a first control output (X _S ) and at the same time on the basis of the desired property or desired properties or target relation (Δ _soll ) or desired relations and the surface-related individual order to order medium of the relevant side of the web or the property depending on or reflecting or indicating further Ausga be (G _O , G _U ) at least an approximation of the detected by the at least one sensor or the sensors property to the predetermined or predetermined desired property or to a fulfillment of the predetermined or predetermined target ratio (Δ _soll ) is effected by Output of at least one second control output (X _Δ ). A method according to claim 39, characterized in that on the basis of the first control output (X _S ) and the second control output (X _Δ ) the commissioned work (12) or the commissioned works (12a, 12b) is driven / are in the sense of a division of a the first control output (X _S ) provided, on both sides of the web-related total order on two only on one side of the material web related individual orders in accordance with the second control output (X _Δ ). Method according to one of claims 25 to 40, characterized in that the sensor arrangement comprises at least two basis weight sensors (14, 16), of which at least one of the weight per unit area (M _raw ) of the material web before application and at least one other, the basis weight (M _tot ) the material web detected after application to both sides, and that from the basis weights before and after the application of the area-related total order of application medium on both sides of the web, in particular the total line weight (M _S ), is determined. Method according to one of claims 25 to 41, characterized in that the sensor arrangement in association with at least one of the sides of the material web, preferably in association with both sides of the material web, (respectively) at least one in particular optically reflective on the area-related individual order of application medium the associated side of the material web and / or at least one sensor (50, 52, 50 ', 52'), in particular a gloss sensor (50, 52), which responds to the property of the material web depending on the area-related individual application to the application medium Color sensor or white sensor, includes. Method according to claim 25, characterized in that a relation, in particular a difference or a ratio, between a property of the material web which relates to the one side of the material web and which depends on the area-related individual order of application medium on this side of the material web representing size and related to the other side of the web, which is determined by the area-related order to order medium on this side of the web dependent property of the web representing size, optionally a whiteness ratio or gloss ratio or a white difference or gloss Difference (ΔG; Δ).

Images