EP0861693A2 - Method and device for directly or indirectly applying a liquid or a pasty product on one or the two sides of a moving web - Google Patents

Abstract

In the (in) direct application of a paste or liquid coating to a moving web (4), of paper or cardboard, a plate (16) gives a temporary interruption to the application of the coating medium (2) at the application point (A) while a splice (6) in the web (4) passes through the application point (A). Also claimed is an assembly with a mechanism (14) to interrupt the application of the coating medium (2) to the web (4) for a stretch which is uncoated at the web splice (6) before or during the passage of the web splice through the application point (A).

Description

The invention relates to a method and an apparatus for direct or indirect one-sided or two-sided Apply a liquid or pasty application medium a preferably spliced running material web, in particular made of paper or cardboard.

Generic methods and devices are in the frame of so-called coating systems, one with a high speed of up to about 2000 m / min running Material web, for example made of paper, cardboard or a textile material and a web width of up to about 8 meters, on one or both sides with one or several layers of an application medium, for example Color, starch, impregnating liquid or the like Mistake.

With the so-called direct order, this is usually under Pressurized liquid or pasty application medium from one Order facility or an order work directly on 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. When the medium is applied indirectly, this becomes liquid or pasty application medium, however, initially a support surface, e.g. the surface of one as an applicator roller designed roller, applied to from there in one Nip through which the material web runs from the application roller to be transferred to the material web.

Since a coating system, once set up, usually both from economic as well works in a non-stop operation for technical reasons it is necessary to run out of one to be coated Material web on rolls or in limited length the like can be provided during operation the system without interruption with the material web to connect new, unused roll of material web and so to create a kind of "endless" length of material. This connection of two material webs is by means of well-known splicing methods and splicing devices executed. However, it has been shown that the Web splices of a running web of material in particular when passing the application facility or the application unit often tear, resulting in an undesirable Business interruption, to committee and not to one insignificant impairment of productivity and Profitability of the coating line leads. It is consequently desirable to increase the number of tears in the splice passes minimize.

DE 195 00 402 A1 describes a device for watering a run past a sprue with a Pouring solution known according to the so-called curtain principle. According to this curtain principle becomes the casting solution between two side curtain holders solely by the action of Gravity as a free-fall and from several layers existing liquid curtain on the around a casting roll guided track cast with a relatively low 300 m / min running speed. The web width will specified in DE 195 00 402 A1 with about 1400 mm. The Device includes means by which the curtain at Demand can be intercepted so that this no longer the train that passes by hits. As such a means so-called "start-stop sheet" used for Interruption of the pouring process in the pouring curtain is pushed so that the casting solution completely from the Start-stop sheet collected and passed into a container becomes. The start-stop plate is used to resume the watering process removed from the pouring curtain and the pouring solution again meets the runway past the gate. The device disclosed in DE 195 00 402 A1 and the associated casting process according to the said curtain principle is commonly used to make negative films used.

The present invention is based on the object generic method in such a way that the adverse signs of tearing, especially of Material web splicing compared to the known state of the art Technology should be reduced as much as possible. Another The task is to carry out a suitable device to create this procedure.

The first-mentioned object is achieved by an inventive one Method with the features of claim 1.

According to this procedure for direct one-sided or two-sided application of a liquid or pasty Application medium on a preferably spliced current Material web, in particular made of paper or cardboard, by means of at least one application device that the order medium at a predetermined order location directly on the Material web, the direct order of the Order medium temporarily interrupted at the job location, while the web splice passes the job site. This means that a spliced material web section that the Order setup does not happen during this time Contact with the order medium comes, ergo uncoated and stays dry. On the one to be selected depending on the application Interruption time will become more detailed below received.

The method according to the invention leads to the known one State of the art to significantly reduce the Demolition numbers of those passing the order facility Web splices and thus a reduction in associated with a web splice failure Business interruptions and the material committee. The Operating costs of a method according to the invention working coating system are thus lowered and the Productivity and profitability are significantly improved.

According to an advantageous embodiment of the invention the interruption of the order preferably begins then if the web splice arrives at the place of order, or immediately before the web splice at the job site arrives. In the first case, the interruption of the Application of the application medium directly at the start of the splice material web approaching the job site, while in second, the interruption before the start of the splice begins.

In the context of a preferred embodiment variant of the method according to the invention, the following applies for the period Tu of the interruption of the direct application of the application medium: T U ≥ L S / v M , where L _{S is} the length of the web splice in the running direction of the web and v _{M is} the web speed of the running web. From the interpretation of the formula (1) in conjunction with the point in time of the start of the interruption described above, it can be seen that the interruption duration is selected such that the entire spliced material web section or additionally also an area of the material web located in front of and behind the spliced material web section is uncoated and stays dry.

The invention is of course not based on this particularly preferred method steps limited. For certain use cases it may also be sufficient the time of the start of the interruption and the Interruption time to choose so that only one essential part of a spliced material web section remains uncoated and dry to the desired positive effect of the direct method according to the invention achieve.

The first-mentioned problem is also solved by a inventive method with the features of Claim 4.

According to this method for the indirect one-sided or two-sided application of a liquid or pasty application medium to a preferably spliced material web running at a web speed v _M , in particular of paper or cardboard, by means of at least one application device which indirectly applies the application medium to the application medium via at least one and _{applies a} running surface running at a speed v _T to the material web at a predetermined application location, before the material web splice passes the application location, the indirect application of the application medium at the application location is briefly interrupted by briefly interrupting the application of the application medium to the carrier surface an interruption point in relation to the running direction of the application medium or the material web in front of the place of application. The running direction of the application medium is to be understood here as the direction in which the application medium already applied to the carrier surface, for example an application roller, is transported to the actual application location at which the medium is transferred from the carrier surface to the material web. When using the aforementioned application roller, for example, the application of the medium to the application roller is interrupted at a suitable point in time and for a certain suitable period of time, so that it consequently remains uncoated for a while and does not transport any application medium to the application location and there onto the running material web can transmit.

In this context it should be noted that this depends on the application device used may be necessary simultaneously with the interruption of the supply of fresh ones Application medium on the application roller possibly also to remove remnants of application medium adhering to the roller, so that the spliced passing the indirect order location Material web section either completely or at least in remains essentially dry and uncoated. It is can be seen that to achieve exactly this effect in particular the time of the start and the duration of the Interruption of the application medium supply on the application roller very precisely to a current position and the respective one Path speed of the indirect order location material web splice to be coordinated. To this Details are given in more detail below.

This indirect method according to the invention also offers already above in connection with the invention direct application process explained advantages in detail.

An advantageous feature of the indirect method according to the invention provides that the interruption of the application at an interruption point S _U spaced from the place of order by the distance Y3 on the carrier surface running at the speed v _T begins at a time T3 at which the speed v _M material web splice to be moved to the place of application, ie specifically its beginning, is located at a distance X3 from the place of order, where: Y3 / v T ≤ X3 / v M .

From the interpretation of formula (2) it can be seen that the time at which the application of the Carrier surface with the application medium is selected so that the simultaneously with the material web and its Web splice in progress to the indirect order location Carrier area (immediately) in front of or directly at the beginning of the the place of order or currently on The place of application is the beginning of the web splice no further application medium on the material web and so that the web splice transfers.

According to a further advantageous embodiment of the indirect method according to the invention, the following applies to the time period Tu of interrupting the application of the carrier surface with the application medium: T U ≥ L S / v M .

Here L _{S is} the length of the material web splice in the running direction of the material web and v _{M is} the web speed of the running material web. As can be seen from the formula (3) in conjunction with the point in time of the start of the interruption, which is defined by the above-mentioned formula (2), the interruption duration is selected such that the entire spliced material web section or additionally also one located in front of and behind the spliced material web section The area of the material web remains completely or essentially uncoated and remains dry.

The above object is further achieved by a Device according to the invention with the features of Claim 7.

This device for direct or indirect one-sided or two-sided application of a liquid or pasty Application medium on a preferably spliced current Material web, in particular made of paper or cardboard, with at least one application device that the order medium at a predetermined order location on the material web orders, comprises at least one order interruption device, the order of the Order medium at the place of order or at a related to the direction of travel of the material web before the place of order interrupts the interruption point, during or before the web splice reaches the job site happens.

This device is suitable for carrying out the inventive method according to claims 1 and 4 and also offers the already in connection with advantages explained in the two methods according to the invention.

In a preferred embodiment of the The device according to the invention comprises the application device at least one nozzle or free jet nozzle from which the application medium in one by the ambient atmosphere running free beam emerges, and at least one opposite the free jet nozzle and from the free jet counter surface to be loaded, the job interruption device at least one breaker area has for the brief interruption of the free jet in a direction crossing the free jet in or through the Free jet or the one formed by it "Application medium curtain" is movable through. Under one Counter surface is either a in the sense of the invention Carrier surface, e.g. an application roller (indirect application), or to understand the material web itself (direct order). The interrupter surface ensures in an advantageous manner an interruption of the by means of the order facility generated direct or indirect order without it this requires the operation of the order facility itself and thus the output of the application medium from the Interrupt the free jet nozzle. The use of the Interrupt area can advantageously both in Connection with the above-mentioned direct according to the invention as well as indirect methods are used. Of most well known Nozzle application devices easily and without great effort with an order interruption device equipped with the interrupter surface be retrofitted.

It has proven to be particularly favorable in terms of construction and function exposed the breaker area in at least one preferred embodiment of the device according to the invention to be arranged to be translationally and / or rotatably movable. In In this context, it is also appropriate that the device according to the invention at least one suitable Drive device for translational and / or includes rotational movement of the interrupter surface.

A rotationally movable arrangement is particularly simple by realizing that the interrupter surface at least one pivotable on the application device attached swivel arm is fixed. By means of a Swiveling movement of the swivel arm can affect the interrupter surface then in one from the nozzle of the applicator emerging medium through crossing direction moves the beam through and thus the direct or indirect application of the application medium in the desired manner to be interrupted. The required dimensions of the Interrupt area arises here, usually under Taking into account the above formulas (1) to (3) the given device and process parameters and especially from the dimensions of the material splice, the running speed of the material web or the Path or rotational speed of a carrier surface, for Example of an application roller and the one to be matched to it Speed of movement of the interruption surface.

Have proven to be effective and easy to manufacture Interrupt areas proved to be essentially flat or are concave. However, the invention is not exclusively on these special design variants limited. In principle, other suitable ones can also be used Shapes such as double concave, convex, or wavy Construction methods etc., with additional stiffeners if necessary or ribs and the like, find application.

Instead of or in addition to that described above Interrupt area can be the job interruption device according to another embodiment the invention also at least one of the application device associated job media supply interrupt device include, which allows the supply or the To prevent the discharge of the application medium in a suitable manner and thus the desired brief interruption of the to achieve direct or indirect order during or before the web splice passes the job site. At the interruption device is, for example around and preferably assigned to the application device automatically operated shut-off valve, a slide or the like, which in a corresponding supply line for the order medium can be provided.

With regard to the indirect method according to the invention in the context of another preferred embodiment variant the device according to the invention provided that the Application device at least one with the application medium current bearing surface, e.g. the scope an application roller that the application medium to the predetermined order location and transported there to the transmits running material web, and the job interruption device with at least one Application medium wiper element is equipped, the related on the running direction of the carrier surface of the application device downstream and the predetermined job location is connected upstream, this application medium stripping element to briefly interrupt the Application of the carrier medium with the application medium the carrier surface can be contacted. That way is also a desired temporary interruption of the to achieve an indirect order during or before the Material web splice passes the job site. As Application medium stripping elements come for example or several scraper blades, scraper bars, scraper rollers or the like and combinations thereof.

Finally, the device according to the invention comprises additional advantageous design feature at least a control device for checking the exact Time of interruption and / or the respective Break time. The control device can depend on Embodiment again suitable measurement, control and Have data processing devices.

It goes without saying that the method according to the invention and the device according to the invention can be used not only in connection with the explained material web splices but also very advantageously with regard to possible defects in the material web, for example holes, local thin spots or the like. The brief interruption of the direct or indirect order is then essentially analogous to the interruption in the case of a material splice. However, as the parameter L _{S that} is decisive for the calculation of the interruption time, instead of the length of the material web splice in the running direction of the material web, the length of the flaw or a flaw region in the running direction of the material web is to be set.

Fig. 1

eine schematische Querschnittsdarstellung einer ersten bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung im Bereich einer Auftragseinrichtung, und

Fig. 2

eine schematische Querschnittsdarstellung einer zweiten bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung im Bereich einer Auftragseinrichtung.

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

a schematic cross-sectional view of a first preferred embodiment of the device according to the invention in the area of an application device, and

Fig. 2

is a schematic cross-sectional view of a second preferred embodiment of the device according to the invention in the area of an application device.

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 shows a schematic, greatly simplified cross-sectional illustration of a first preferred embodiment of the device according to the invention in the area of an application device. The device according to FIG. 1 is designed as a device for direct one-sided application of a liquid or pasty application medium 2 onto a spliced 6 running material web 4, in particular made of paper or cardboard. The application device, which in the present case is a free jet application unit 8, is arranged opposite a rotating support roller 10, which carries the running material web 4 to be coated with the application medium 2. In this configuration, the peripheral speed V _{U of} the rotating support roller 10 corresponds to the web speed v _{M of} the running material web 4 ( V U = V M ).

As can be seen in the drawing, the free jet nozzle applicator 8 comprises a nozzle 12, from which the liquid or pasty application medium 2 emerges in a free jet running through the ambient atmosphere, which is indicated by an arrow, and at one marked with the reference symbol A. , predetermined order location is applied to the running spliced 6 material web 4. The position of the material web splice 6 at an assumed time T1 is defined by the position of the start PA1 and end PE1 of the material web splice 6 and its length L _S on the circumference of the support roller 10, which is related to the running direction of the material web 4.

The device is furthermore equipped with an order interruption device 14 equipped which the Application of the order medium 2 at the order location A briefly interrupts while the web splice 6 den Order location A happens. This will become more detailed later explained. The job interrupt device 14 comprises a concavely curved interrupter plate 16 that in essentially over the entire machine width of the device extends and with its side edges each on the free End of one on the application device 8 about an axis of rotation D pivotally attached pivot arm 18 is fixed. Like in the Fig. 1 indicated by an arrow, that is Interrupter plate 16 for briefly interrupting the application medium free jet continuously ejected from the nozzle 12 from a first position in continuous Is shown in a line crossing the free jet Direction through the free jet in a second Swiveling position, indicated in dashed lines is. Likewise, if necessary, swiveling the Breaker plate 16 from the second to the first position possible.

The axis of rotation D of the swivel arm 18 of the interrupter plate 16 is coupled to an automatically operated drive device 20, which allows said swivel movement of the swivel arm 18 and the interrupter plate 16. The drive device 20 is in turn connected to an automatic control device 22 for checking the exact time of the interruption and / or the respective interruption duration. The control device 22, which comprises a measuring device 24 with a position sensor and control, switching and data processing devices, makes it possible, among other things, to determine an exact instantaneous position of the material web splice 6 of the running material web 4 in relation to the job location A or another reference point and as a function thereof Both of this parameter and of other parameters to be taken into account, namely in particular the usually predetermined dimensions of the material web splice 6 and the interrupter plate 16 and the web or running speed v _{M of} the material web 4, to activate the drive device 20 in a suitable manner.

The following steps are now carried out for briefly interrupting the direct application of the application medium 2 at the application location A while the material web splice 6 passes the application location A. At the point in time T1 at which the material web splice 6 approaching the application location A is in the current position represented by the points PA1 and PE1 at a distance X1 from the application location A, the drive device 20 is activated by the automatic control device and the interrupter plate 16 swivels in the direction of the application location A to the free jet emerging from the nozzle 12. The swiveling speed V _{S of} the interrupter plate 16 is matched to the path speed v _{M of} the material web 4 in such a way that the edge of the interrupter plate 16 enters the free jet and interrupts it shortly before the beginning PA1 of the spliced material web section 6 arrives at the actual job location A. This means that from this point in time no further application medium 2 reaches the subsequent material web section in which the material web splice 6 is also located. The time period T _{U of} the interruption of the free jet, which in this specific case is simply calculated from the width B of the interrupter plate 16 in the running direction of the material web 4 and the swiveling speed V _{S of} the interrupter plate 16 ( T U = B / V S ) is selected so that the following applies: T U > L S / v M .

It follows that if the swiveling Breaker plate 16 again at a time T2 from the Free jet emerges and the order medium 2 is again on the running material web 4 arrives, both the entire Material web splice 6, the job location A completely has passed and at one through points PA2 and PE2 represented advanced position, as well additionally one in front of and behind the spliced one Material web section 6 located area of the material web 4 remained uncoated and dry.

FIG. 2 shows a schematic, greatly simplified cross-sectional illustration of a second preferred embodiment of the device according to the invention in the area of an application device. The device according to FIG. 2 is designed as a device for the indirect one-sided application of a liquid or pasty application medium 2 onto a spliced 6 running material web 4, in particular made of paper or cardboard. In this case, the application device is a scooping application unit (so-called roll applicator), in which the material web 4 supported by a rotating support roller 10 is formed at a web speed v _M by one of the support roller 10 and a rotating application roller 28 Roll gap is running. In this configuration, the web speed v _{M of} the running material web 4 corresponds to the peripheral speed V _{U of} the support roller 10. The application roller 28 rotating at the peripheral speed v _T (in this case V _T << v _M ) is partly in an application medium bath 30 immersed, there takes up the liquid or pasty application medium 2 to be applied on the circumference 28.2 serving as the carrier surface and transports it to the nip in which the application medium 2 is transferred to the material web 4 at the application location A. For the following explanations, the position of the material web splice 6 running towards the order location A at an assumed time T3 is again due to the position of the beginning PA3 and end PE3 of the material web splice 6, its length L _S related to the direction of travel of the material web 4 and the distance X3 to it Order location A defined.

This device also has an order interruption device 14 equipped, the one on Application unit 26 arranged application medium stripping element 32 in the manner of a doctor blade. The application medium stripping element, the following as a scraper blade 32 referred to, extends essentially over the total machine width of the device. As in FIG. 2 recognizable, the scraper blade 32 is in one position arranged based on the in the drawing by a Arrow indicated running direction of the application roller 28 a Area 30 of the application device, namely the Application medium bath 30, in which the material web 4 transferring order medium 2 to the scope 28.2 of Applicator roller 28 arrives, connected downstream and the place of application A is connected upstream in the nip.

The scraper blade 32 can be contacted with the carrier surface 28.2 for briefly interrupting the application medium application to the peripheral surface of the application roller 28 serving as the carrier surface 28.2. More precisely, the free edge of the scraper blade 32 assigned to the application roller 28 is attached to the support surface with the aid of a pressing device 34 acting on the scraper blade 32, which, like the drive device of the embodiment variant according to FIG. 1, is connected to a corresponding control device 22, 24 28.2 of the application roller 28 can be pressed on and at the contact point S _U scrapes the application medium 2 which has previously reached the application roller 28 in the application medium bath 30 from the carrier surface 28.2. Since the further transport of the application medium 2 at the point S _U , which is measured on the circumference 28.2 of the application roller 28 by a distance Y3 from the application location A, is interrupted, after the portion of the application medium that is still just in front of the point of interruption S _U on the Application roller 28 has passed through the nip, consequently no further application medium 2 are transferred to the running material web 4 at the application location A.

In order to keep the material web splice 6 of the material web 4 running towards the application location A uncoated and dry, similar to the exemplary embodiment according to FIG. 1, while passing the application location A, the indirect application of the application medium 2 at the application location A is briefly interrupted by the fact that the scraper blade 32 is pressed briefly in the previously explained manner by means of the pressing device 34 at the interruption point S _U in front of the application location A to the carrier surface 28.2 of the application roller 28 and, as already mentioned, interrupts the further transport of the application medium 2 to the application location A. , namely before the material web splice 6 arrives at the job location A or passes it. The point in time at which this interruption begins at point S _U must therefore be chosen such that: Y3 / v T ≤ X3 / v M .

For the period of time Tu during which the scraper blade 32 rests on the carrier surface 28.2, ie the circumference of the application roller 28 and thus interrupts the further transport of the application medium 2 to the application location A and thus a transfer of the application medium 2 to the material web 4 at the application location A. : T U ≥ L S / v M .

As already mentioned, L _{S is} the length of the material web splice 6 in the running direction of the material web and v _{M is} the web speed of the running material web 4.

From the aforementioned two formulas (B) and (C) results yourself that when the scraper blade 32 moves away from its Contact with the carrier surface 28.2 of the application roller 28 is released and again application medium 2 on the carrier surface 28.2 for Order location A transported and there to the current Material web 4 is transmitted, both the entire Material web splice 6, which is now the job location A completely has happened and at a time T4 on one by points PA4 and PE4 represented advanced ones Position is also in front of and behind the spliced material web section 6 located smaller Area of material web 4 uncoated and dry stayed.

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 method and the device according to the invention can also adopt embodiments other than those described above. In particular, the device can have features that represent a combination of the respective individual features of the claims. So it is fundamentally conceivable to use other applicators than the ones described above, for example chamber applicators, so-called "speedsizers" (for which applies V U = V M = V T ) etc., and the application units can be connected upstream and / or downstream of further functional units, such as, for example, smoothing or doctoring devices. Depending on the chosen configuration and dimension of the applicator as well as the distance of the material web splice to the application location A from the application location A, it is possible both with the direct and the indirect method according to the invention that the support roller or the application roller during the interruption of the direct or indirect Order not only continues to rotate, as in the examples above, by a part of its circumference, but also by a multiple of the circumference, ie executes several revolutions.

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

Reference list

2

flüssiges oder pastöses Auftragsmedium

4

Materialbahn

6

Materialbahnspleiß

8

Freistrahldüsen-Auftragswerk

10

Stützwalze

12

Düse von 8

14

Auftrags-Unterbrechungseinrichtung

16

Unterbrecherblech

18

Schwenkarm

20

Antriebseinrichtung von 16, 18

22

Kontrolleinrichtung

24

Meßeinrichtung / Positionssensor

26

Schöpf-Auftragswerk

28

Auftragswalze

28.2

Umfang / Trägerfläche von 28

30

Auftragsmedium-Bad

32

Abstreifklinge

34

Andrückeinrichtung

B

Breite von 16

D

Drehpunkt des Schwenkarms 18

L_S

Länge des Materialbahnspleisses 6

PA1

Lage des Anfangs von 6 zum Zeitpunkt T1

PA2

Lage des Anfangs von 6 zum Zeitpunkt T2

PA3

Lage des Anfangs von 6 zum Zeitpunkt T3

PA4

Lage des Anfangs von 6 zum Zeitpunkt T4

PE1

Lage des Endes von 6 zum Zeitpunkt T1

PE2

Lage des Endes von 6 zum Zeitpunkt T2

PE3

Lage des Endes von 6 zum Zeitpunkt T3

PE4

Lage des Endes von 6 zum Zeitpunkt T4

S_U

Kontaktpunkt zwischen 28.2 und 32 / Unterbrechungsstelle

T1

Zeitpunkt

T2

Zeitpunkt

T3

Zeitpunkt

T4

Zeitpunkt

T_U

Zeitdauer / Unterbrechungsdauer

v_M

Bahngeschwindigkeit von 4

V_S

Schwenkgeschwindigkeit von 16

V_T

Umfangsgeschwindigkeit von 28

V_U

Umfangsgeschwindigkeit von 10

X1

Abstand von 6 zum Auftragsort A zum Zeitpunkt T1

X3

Abstand von 6 zum Auftragsort A zum Zeitpunkt T3

Y3

Abstand von S_U zum Auftragsort A zum Zeitpunkt T3

Designate it:

2nd

liquid or pasty application medium

4th

Material web

6

Web splice

8th

Free jet nozzle work

10th

Backup roller

12th

Nozzle of 8

14

Order interruption facility

16

Breaker plate

18th

Swivel arm

20th

Drive device from 16, 18

22

Control device

24th

Measuring device / position sensor

26

Schöpf commissioned work

28

Applicator roller

28.2

Circumference / support area of 28

30th

Application medium bath

32

Scraper blade

34

Pressing device

B

Width of 16

D

Pivot point of the swivel arm 18

L _S

Length of web splice 6

PA1

Location of the beginning of 6 at time T1

PA2

Location of the beginning of 6 at time T2

PA3

Location of the beginning of 6 at time T3

PA4

Location of the beginning of 6 at time T4

PE1

Location of the end of 6 at time T1

PE2

Location of the end of 6 at time T2

PE3

Location of the end of 6 at time T3

PE4

Location of the end of 6 at time T4

S _U

Contact point between 28.2 and 32 / break point

T1

time

T2

time

T3

time

T4

time

T _U

Duration / interruption duration

v _M

Web speed of 4

V _p

Swivel speed of 16

V _T

Peripheral speed of 28

V _U

Peripheral speed of 10

X1

Distance from 6 to order location A at time T1

X3

Distance from 6 to order location A at time T3

Y3

Distance from S _U to order location A at time T3

Claims (15)

Method for direct one-sided or two-sided application of a liquid or pasty application medium (2) to a preferably spliced (6) running material web (4), in particular made of paper or cardboard, by means of at least one application device (8) which attaches the application medium (2) to a applies the predetermined order location (A) directly to the material web (4),
comprising the following step: brief interruption (16) of the direct application of the application medium (2) at the application location (A) while the material web splice (6) passes the application location (A). Method according to claim 1,
characterized in that
the interruption (16) begins when the web splice (6) arrives at the place of order (A),
or immediately before the material web splice (6) arrives at the place of application (A). The method of claim 1 or 2,
characterized in that
for the duration (Tu) of the interruption (16) of the direct application of the application medium (): T U ≥ L S / v M , in which L _{S is} the length of the material web splice (6) in the running direction of the material web (4), and v _{M is} the web speed of the running material web (4). Method for the indirect one-sided or two-sided application of a liquid or pasty application medium (2) to a preferably spliced (6) material web (4) running at a web speed v _M , in particular made of paper or cardboard, by means of at least one application device (26), which Application medium (2) is applied indirectly to the material web (4) at a predetermined application location (A) via at least one carrier surface (28.2) to be loaded with the application medium (2) and running at a speed v _T , comprising the following step: briefly interrupting the indirect application of the application medium (2) at the place of application (A) by briefly interrupting (32) the application of the application medium (2) to the carrier surface (28.2) on one in relation to the running direction of the application medium (2) or the material web ( 4) Interruption point (S _U ) located in front of the job site (A) before the material web splice (6) passes the job site (A). Method according to claim 4,
characterized in that
the interruption (32) of the application at an interruption point (S _U ) at a distance from the order location (A) by the distance Y3 on the carrier surface (28.2) running at the speed v _T begins at a time T3 at which the speed v _M the material web splice (6) to be moved to the place of application (A) is at a distance X3 from the place of order (A), where: Y3 / v T ≤ X3 / v M . Method according to claim 4 or 5,
characterized in that
for the period (Tu) of the interruption (32) of the application of the application medium (2) to the support surface (28.2): T U ≥ L S / v M ,
in which L _{S is} the length of the material web splice (6) in the running direction of the material web (4), and v _{M is} the web speed of the running material web (4). Device for direct or indirect one-sided or two-sided application of a liquid or pasty application medium (2) to a preferably spliced (6) running material web (4), in particular made of paper or cardboard, with at least one application device (8; 26, 28, 30), which applies the application medium (2) to the material web (4) at a predetermined application location (A),
full at least one order interruption device (14) which briefly interrupts the order of the order medium (2) at the order location (A) or at an interruption point (S _U ) located in front of the order location (A) in relation to the running direction of the material web, during or before the web splice (6) passes the place of application (A). Device according to claim 7,
characterized in that the application device (8) comprises at least one free jet nozzle (12), from which the application medium (2) emerges in a free jet running through the ambient atmosphere, and at least one counter surface (4) opposite the free jet nozzle (12) and to be acted upon by the free jet, and the job interruption device (14) has at least one interrupter surface (16) which can be moved in or through the free jet in a direction crossing the free jet for a brief interruption of the free jet. Device according to claim 8,
characterized in that
the interrupter surface (16) is arranged such that it can be moved in translation and / or rotation. Device according to claim 9,
characterized in that
the interrupter surface (16) is fixed to at least one swivel arm (18) which is pivotably (D) fastened to the application device (8). Device according to claim 9 or 10,
characterized in that
this comprises at least one drive device (20) for translatory and / or rotary movement of the interrupter surface (16). Device according to one of claims 8 to 11,
characterized in that
the interrupter surface (16) is substantially flat or concave. Device according to claim 7,
characterized in that
the order interruption device (14) comprises at least one order medium supply interruption device (32) assigned to the order device (26, 28). Device according to claim 7,
characterized in that the application device (26, 28, 30) comprises at least one running carrier surface (28.2) to be loaded with the application medium (2), which transfers the application medium (2) to the running material web (4) at the predetermined application location (A),
and the job interruption device (14) comprises at least one application medium stripping element (32), which is connected downstream of the application device (30) with respect to the running direction of the carrier surface (28.2) and is connected upstream of the predetermined job location (A), and for briefly interrupting the application the carrier surface (28.2) with the application medium (2) can be contacted with the carrier surface (28.2). Device according to one or more of claims 7 to 14,
characterized in that
this comprises at least one control device (22, 24) for checking the point in time of the interruption and / or the duration of the interruption (T _U ).

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