DE102007015638A1 - Machine for producing a tissue web, in particular a tissue machine - Google Patents

Abstract

The invention relates to a machine for producing a tissue web, comprising a former comprising two circumferential endless belts, forming a Formierbereiches and a take-off or separation device for one of the endless belts and the guided between them fibrous web. The invention is characterized in that at least one dewatering strip is arranged in the forming region formed by the two belts in front of the take-off or separating device, which takes effect on one of the two belts.

Description

The The invention relates to a machine for producing a tissue web, in particular tissue machine in detail with the features of the preamble of claim 1.

Machines for the production of tissue webs are already known in different versions from the prior art. These comprise in the wet part of a former, which is designed depending on the former concept as a twin-wire former or so-called crescent former. In the former case, sheet formation takes place between two dewatering sieves forming a double-wire zone, while in the second case sheet formation takes place in a double-belt zone formed between a felt belt and a dewatering wire. Both formers are preferably designed in roll construction, ie comprise a forming roller whose circumference is partially wrapped by the two endless belts. The separation of the two bands with continuation of the fibrous web with one of the bands is carried out either still in the wrapping area with the forming or downstream of this, by both bands are continued together after expiration of the forming roller. In the double belt area the formation takes place in both cases, ie fiber orientation and drainage. The fiber suspension is introduced via a headbox in a wedge-shaped inlet gap formed between the bands. If a separation of both bands in the forming roll, the fibrous web is taken along the flow line on Formierzylinder of the band, which wraps around the forming roller on its outer circumference directly with its inside. Such an embodiment is for example in EP 1 120 492 A2 described. The fibrous web is guided according to a first embodiment to the transfer to other machine areas on the wire. Instead of the inner band in the wrapping area, according to a second embodiment, a felt belt can also be used, so that the pulp suspension is introduced between a wire belt and a felt belt in the forming area and fed separately from the wire belt with the felt belt of the next process stage.

Another possibility is as in WO 03/06 2528 A1 described the formation formed on the forming roll after the forming roll to continue to pass between the two belts, two wire belts or a wire belt and a felt belt over a predefined distance and to separate the two belts by means of a separating element. The separating element is designed in the form of a separating suction device. In both embodiments according to the prior art, the fibrous webs at the end of the former at handover to the next processing area a low dry content and depending on the leadership of the bands and thus the double band zone sometimes a very irregular formation.

Of the The invention is therefore based on the object, a former of a machine for the production of a tissue web such that the mentioned disadvantages of the prior art are avoided, in particular a good formation and a high dry content of Fiber web is reached at the end of the forming line.

The inventive solution is characterized by the Characteristics of claim 1 characterized. Advantageous embodiments are described in the subclaims.

A Machine for producing a tissue web, in particular a tissue machine, comprising a former with two continuous endless bands - one first endless revolving band and a second endless revolving Band - which form a double band zone, and a Trennsaugeinrichtung to separate the two bands taking along the between the fibrous web formed on the belts is on a belt according to the invention, characterized in that the double belt zone still another drainage device, comprising at least one, preferably a plurality of drainage strips, each of which acts on one of the two bands, is arranged. The arrangement of the drainage tion device takes place in the fiber suspension running direction or fibrous web direction considered upstream of the Trennsaugeinrichtung or upstream.

The solution according to the invention makes it possible to build up a dewatering pressure in the fiber suspension or the already formed fiber suspension in the double belt area depending on the design of the dewatering strips, wherein the size and the course of the dewatering pressure in the belt running direction can be determined as a function of the arrangement and design of the dewatering device , Depending on the presence of the state or the nature of the pulp suspension in the region of this dewatering device, the formation can already be completed, ie there is already a consistency in which the fibers are firmly connected to each other, in which case the dewatering device only the function of additional Drainage or increase the degree of dewatering in the shaper area. In the other case, in which the formation is not yet completed, that is still no fibrous web but still pulp suspension with only partial connection of the fibers is present, by the additional dewatering pressure forms the pulp suspension and dehydrated. In both cases, however, the dry content in the fibrous web in the end region of the former or when transferring to other process devices, such as creping cylinder or a press unit, in particular shoe press unit is substantially higher than in the embodiments of the prior art.

When Drainage strips can be found across the bandwidth, d. H. extending transversely to the machine direction strip-shaped Elements that have a printing surface on one of the bands take effect, use. Preferably, the drainage strips or at least the area forming the printing area Wear reasons made of ceramic. The structure preferably corresponds to those of conventional forming strips Foils, wherein for the formation of the drainage device on parts of known strips of other formers for the sheet formation be resorted to fibrous webs can.

The Arrangement of the drainage device can be immediate before the Trennsaugeinrichtung or spaced from this done. In this case, the desired drainage behavior by the choice of location and design of the drainage device to be influenced.

The Drainage device can according to a first execution only on one, according to a further execution of both bands effective become. In the first case, the drainage device includes one, at least one drainage bar, preferably a plurality of viewed in the tape running direction spaced from each other Drainage strip comprising drainage strip arrangement, which is effective on the inside of one of the two bands. In this case, the drainage is forced unilaterally, whereby increased filler contents at the top or underside of the fibrous web can be adjusted. Is a uniform as possible filler distribution and homogeneity in the thickness direction of the fibrous web, in particular Tissuebahn aspired, is preferably on both bands a drainage pressure built up over propagated on the fibrous web and to a uniform Drainage at the top and bottom leads. In this case, the drainage device comprises a associated with the first band first Entwässerungsleistenanordnung with at least one first drainage strip, preferably several drainage strips and one the second band associated second Entwässerungsleistenanordnung with at least a second drainage bar, preferably a plurality second drainage strips, the first and second drainage strips in the strip running direction in axial Direction considered in each case offset from each other, d. H. on the gap are arranged.

The Arrangement of the dewatering device of a Trennsaugeinrichtung in the double belt zone must precede depending on the design the double band zone and band guide no additional space compared to conventional solutions, so that increased dry contents in the fibrous web at the end of the former at the same or only slightly larger machine length can be achieved.

to Reduction of storage costs for the individual strips Preferably, a plurality of drainage strips of a Entwässerungsleistenanordnung stored on a common support means, wherein the strips depending on the type of storage on the support either with each other mechanically coupled or free from such coupling are.

Around a fixed positional relationship between a Entwässerungsleistenanordnung in the band, in which the Trennsaugeinrichtung is effective, and the Trennsaugeinrichtung to ensure that Entwässerungsleistenanordnung on the housing of the separating sucker stored. This eliminates the need for separate storage facilities become. According to an advantageous development may be the at least one Entwässerungsleistenanordnung integrated upstream of the suction zones in the separating suction device be.

In terms of the storage of the individual drainage strips exist depending on the desired drainage process several Options. These can be arranged rigidly, be mounted resiliently or elastically or according to a particularly advantageous embodiment with respect to their on respective band acting contact force be variably adjustable. In the latter case, the contact pressure on the individual drainage bar preferably hydraulically or pneumatically adjustable, with respect to the means for providing the contact pressure, in particular the Pressure source to other process systems of the tissue machine are used can and thus by the thus made functional concentration no separate pressure source is required. The individual strips are then further means for adjusting the size assigned to the contact pressure, so that even with thickness variations always the same contact pressure can be guaranteed.

The arrangement and design of the Entwässerungsleisteneinrichtung is preferably carried out against a flat belt surface described by the tape guide, ie the tape guide in the dewatering device is free of a Curvature. It is also conceivable, however, to adapt the area spanned by a plurality of drainage strips, which are spaced apart in the direction of the belt, to the tape guide, in particular when a drainage arrangement is provided in only one tape. In this case, the Entwässerungsleistenanordnung may have considered a curved active surface in the tape running direction. The effect of the drainage strips thereby superimposed on the drainage effect due to the additional due to the curvature tensile and compressive stresses on the individual bands.

According to one Further development can increase the degree of drainage the individual Entwässerungsleistenanordnung combined with suction become.

The Solution according to the invention is for both versions of formers for tissue machines with a twin-wire zone, d. H. the first endless circulating band and the second endless circulating band are designed as Entwässungssiebbänder, as well as versions as Crescent-Former, in which sheet formation takes place between a felt and a wire belt, used. In the latter case, one of the two is endless circulating belts as dewatering screen belt and the other endless circulating band is executed as a felt belt, wherein the acceptance or separation device associated with the felt belt is and on the inside of the felt belt is effective.

The used drainage straps can with uniform or to achieve different drainage rates and thus the leaf surface areas zonal different Sieve permeability can be formed.

The Trennsaugeinrichtung comprises at least one suction zone, preferably are at least two cascaded and individually controllable Suction zones for adjusting the pressure conditions in the separation area provided the bands. The effective area of the Trennsaugeinrichtung can run flat or curved be in the latter case, the Trennsaugeinrichtung in the direction change of the tape guide are included can.

The Leadership of the individual bands is also about Guide rollers. The former of the machine for producing a tissue web, in particular tissue former is constructed in roll construction, d. H. this includes a forming roll that covers part of its handling is wrapped in the circumferential direction of the two bands, the double band area also after the expiration of the bands from the forming roller and the separation of the bands spaced apart from this. The two bands form one wedge-shaped gap on the forming roll, in which the Pulp suspension via a headbox, which or multilayered, is introduced.

Of the Shaper designed according to the invention is independent from the further construction of the machine for producing a tissue web.

The solution according to the invention is hereinafter explained with reference to figures. In detail this is the following shown:

1a illustrates a first embodiment of an inventively executed former with two endless circulating belts in the form of Entwässungssiebbändern and arrangement of a Entwässerungsleistenanordnung in the first band;

1b illustrates a further embodiment of an inventively executed former with two endless circulating belts in the form of Entwässungssiebbändern and arrangement of a Entwässerungsleistenanordnung in the second band;

2a illustrates a further embodiment of an inventively designed former with a first endless rotating screen belt and a felt belt and arrangement of Entwässerungsleistenanordnungen in both bands;

2 B illustrated by a section from 2a an alternative embodiment of a separating sucker;

3a and 3b exemplify possible embodiments of the drainage device;

4 illustrated by a structural design, a particularly advantageous embodiment of a dewatering arrangement in the forming area.

The 1a illustrated in a schematic simplified representation based on a section of a machine 1 for producing a tissue web, the basic structure of a former designed according to the invention 2 , which is part of a wet part, for formation and drainage according to a first embodiment. The shaper 2 For this purpose, a double-belt zone describing a forming area and a dewatering section is included 3 in which the pulp suspension S is between two endless circulating belts, a first endless circulating belt 5 and a second endless circulating band 6 , is performed under formation of the forming and drainage area. The shaper 2 is designed as a roll former. The two endless ribbons 5 and 6 run in a first Drainage section I via a drainage element 7 , which is preferably in the form of a forming roller 8th is executed. The two continuous endless bands form 5 and 6 together a wedge-shaped inlet gap 9 containing the pulp suspension S immediately from a headbox 10 receives. The separation of the two endless bands 5 and 6 with continuation of the fibrous web F formed from the pulp suspension at one of the two circulating endless belts, here the first circulating endless belt 5 , the forming roller takes place 8th and thus downstream of the first dewatering section I. This is the fibrous web F continuing circulating band, here the first endless circulating band 5 , an acceptance or separation device 11 assigned as the Trennsaugeinrichtung 12 is executed. This will be on the inside 13 the first endless circulating band 5 effective with which the band 5 directly on the outer circumference 4 the forming roller 8th to be led. The area between the sequence A of the first endless belt 5 from the forming roll 8th or the two bands 5 . 6 from the outer circumference 4 the forming roller 8th and the separation of the two endless bands 5 in the area of the separating suction device 12 each other is referred to as the second drainage area II. In this case, the forming region extends at least over the first drainage region I, preferably also over a large part of the second drainage region II, in particular to the separating suction device 12 , According to the invention is in the range of common band guide, ie double band zone 3 a drainage device 14 provided that at least one drainage bar 16 , preferably a plurality of these. This is or are in the second drainage area 11 arranged, that is, between the sequence A of endless belts 5 . 6 at the forming roller 8th and the Trennsaugeinrichtung 12 ,

The 1a illustrates a version with two endless bands 5 and 6 , for example in the form of drainage tapes 17 and 18 are executed and form a twin-wire zone. These can be designed differently depending on the design with respect to their drainage performance and also within a dewatering belt 17 and or 18 Have zones of different drainage performance. The leadership of the fiber suspension S thus takes place between the two dewatering belts 17 and 18 even after the forming roller 8th , wherein the separation in the region of Trennsaugeinrichtung 12 he follows. The separating suction device 12 Here is the first endless circulating band 5 assigned. The arrangement takes place within the first endless band 5 formed loop. The first volume 5 The resulting fibrous web F continues to the next process step, for example by transfer to a felt belt. According to the first embodiment, the drainage strips 16 just a tape, here exemplified the first endless rotating screen belt 5 assigned. Preferably, a plurality, a Entwässerungsleistenanordnung 15.1 forming drainage strips 16.1 intended. This will be on the inside 13 the first endless circulating band 5 effective. The single drainage bar 16.1 causes an additional pressure pulse on the first endless circulating band 5 and thus between the two endless belts, especially the dewatering belts 17 and 18 Guided fiber suspension S. The single drainage bar 16.1 can be designed as a rigid bar, as exemplified, or resiliently mounted or in terms of their contact pressure on the inside 13 the first endless circulating band 5 be variably adjustable. These possibilities will once again be exemplary in 3 explained. The arrangement of the Entwässerungsleistenanordnung 15.1 takes place before the Trennsaugeinrichtung 12 in the direction of the drainage straps 17 and 18 considered.

Furthermore, it is conceivable that the arrangement of the at least one drainage strip 16 alternatively in the other second endless band 6 make. This is in 1b by way of example with reference to a section of a machine 1 for the production of tissue webs, in particular the former 2 shown. The 1b illustrates an embodiment according to 1a with the arrangement of at least one drainage strip 16.2 , preferably a Entwässerungsleistenanordnung 15.2 comprising a plurality of spaced apart in the strip running direction and preferably extending over the entire width dewatering strips 16.2 in the second endless circulating band 6 , The basic structure corresponds to that in 1a Therefore, the same reference numerals are used for the same elements. Again, the two endless ribbons 5 and 6 by way of example as drainage screen belts 17 and 18 educated. The drainage bar 16.2 is doing on the inside 19 of the second endless circulating band 5 , in particular drainage filter belt 18 , effective. These can also be either as a rigid bar, spring-mounted bar or variable in terms of their contact pressure to the tape 6 Pressable drainage bar 16.2 be educated. With regard to the possible embodiments is also on the embodiments in 3 directed.

The inventive arrangement of additional drainage strips 16.1 respectively. 16.2 before the Trennsaugeinrichtung 12 in the area of the double belt zone 3 , for versions with two strainer belts 17 . 18 In addition, a pressure can be built up in the twin-wire zone and thus the fiber material suspension or web formed and / or dewatered. The arrangement of the bands 5 . 6 and the assignment and location of the drainage strips to these determines the direction of drainage.

Clarify the 1a and 1b exemplified a formation of a double band range 3 from two endless circulating bands 5 and 6 used as drainage screen belts 17 and 18 are educated, clarified 2a a possible embodiment with a first endless circulating band in the form of a felt belt 20 and a second endless circulating band 6 in the form of a drainage screen 18 , The rest of the construction corresponds essentially to that in the 1a and 1b Therefore, the same reference numerals are used for the same elements. Again, a Trennsaugeinrichtung 12 provided, wherein in the second drainage area II also a drainage device 14 comprising at least one drainage strip is arranged. In the illustrated case, the drainage device comprises 14 two drainage bar arrangements 15.1 and 15.2 , wherein the first Entwässerungsleistenanordnung 15.1 the felt band 20 is assigned and on the inside 13 becomes effective and exemplified only a drainage bar 16.1 includes. The second drainage bar arrangement 15.2 is the second endless circulating band 6 in the form of the drainage screen 18 associated and includes a plurality of drainage strips 16.2 , The first and second drainage strips 16.1 . 16.2 are in the axial direction with respect to the strip running direction considered offset from each other, that is, that a first drainage bar 16.1 or the first drainage strips 16.1 for example, within the axial distance between the two adjacent drainage strips 16.2 the second Entwässerungsleistenanordnung 15.2 in the second endless circulating band 6 are arranged. Preferably, the second drainage strips are 16.2 at a common carrying device 21.2 stored. This may be a pan. Further conceivable is a suction box 22 in the form of a Untersiebsaugkastens. The individual drainage strips 16.2 are in the support element 21.2 or the suction box 22 stored. The storage can be either rigid, but preferably elastic, in particular resilient or done via means for variable adjustment of a contact pressure on the individual or the majority of the drainage strips, which are preferably carried out individually controllable. Preferably, at least elastically mounted, very particularly preferably used with regard to the contact pressure variable controllable drainage strips. These can adapt to varying layer heights in different dewatering conditions, wherein the contact pressure of the strips can be kept constant. Depending on the arrangement of the strips to each other and the design of these, the filler content at the individual sides - top and bottom - of the formation can be influenced.

With regard to the execution of Trennsaugeinrichtung 12 There are a number of possibilities. This can be with a flat surface as in the 1a . 1b and 2a be shown represented or as according to 2 B have a curved active surface. This is a fixed element, that is, corresponding to the first endless belt 5 , especially the inside 13 , effective area 26 is not changeable in its position. For versions with a curved surface 26 This offers the advantage that here also equal to a separation with deflection of the first endless belt 5 can be done without this on the inside 13 is damaged, since no edges or corners are provided, but the decrease takes place in the region of a curvature. Furthermore, the Trennsaugeinrichtung 12 through a suction zone 27 be characterized, which extends over the entire strip width, as in 1a represented, or as in the 1b . 2a and 2 B exemplified by at least two in the strip running direction successively arranged suction zones 27 and 28 be characterized, wherein the individual zones are preferably individually and variably adjustable in terms of their suction.

The designs of the Entwässerungsleistenanordnungen 15.1 . 15.2 for the twin-wire zone can also be transferred to a felt belt / screen combination and vice versa.

The 3a and 3b illustrate exemplified possible combinations of the arrangement and storage of the first and second drainage strips 16.1 and 16.2 the first and second Entwässerungsleistenanordnung 15.1 . 15.2 , where according to 3a the first drainage strip arrangement 15.1 two drainage strips 16.1 during the second Entwässerungsleistenanordnung 15.2 three drainage strips 16.2 having. According to 3b is an example of the first endless circulating band 5 at least one such drainage strip 16.1 assigned while in the second endless circulating band 6 at least two such drainage strips 16.2 are provided. According to 3a are exemplary two drainage strips 16.1 provided that are designed as rigid strips while the drainage strips 16.2 are designed as elastic or spring-mounted strips, which, for example, on a also called formation box Untersiebsaugkasten 22 are stored on spring devices, wherein the suction through the drainage can be additionally influenced. Instead of the lower suction cup 22 can also be provided a tub for catching water. The possibility of storage can also be reversed between the first and the second dewatering strip, that is, not shown here, the second dewatering strips 16.2 rigid and the first drainage strips 16.1 be elastically mounted. Preferably, however, an embodiment according to 3b carried out, in which at least one of the drainage strips - first drainage strip 16.1 and / or second drainage bar 16.2 - Are adjustable in terms of their contact pressure. The 3b illustrates a version with a rigidly mounted drainage strip 16.1 in the first endless circulating band 5 and at least two second drainage strips 16.2 , which are variably adjustable in terms of their contact pressure. These are means 23 assigned, via which the controllability takes place. Preferably, the controllability takes place 1 the individual strip individually so that a different drainage behavior is adjustable in the direction of tape travel. The means for this purpose comprise a pressure medium source 29 and means 24 to adjust the pressure on the individual drainage bar 16.2 , It is also conceivable, the rigid drainage bar 16.1 as a spring-loaded drainage strip 16.1 execute or the first drainage strips 16.1 with variable contact pressure and the second drainage strips 16.2 rigid or resilient to store, or the drainage strips both Entwässerungsleistenanordnungen 15.1 and 15.2 perform variable controllable in terms of their contact pressure. In the latter case, the controllability of both Entwässerungsleistenanordnungen 15.1 . 15.2 taking advantage of the same system. As a source of pressure medium, a separate source of pressure medium can be provided or, for example, be resorted to pressure medium sources of other systems in the machine.

The 3b illustrates a particularly advantageous embodiment, in which the dewatering intensity and the guiding direction of the fibrous web can be actively influenced.

The individual drainage strips 16.1 . 16.2 can also be combined with a suction device. Furthermore, it is also conceivable to integrate the drainage strip in the first endless belt in the separating suction device. Preferably, however, at least one embodiment is always selected in which the drainage strips 16.1 in the first endless circulating belt in terms of their position relative to the vacuum cleaner 12 are firm. This will be according to 4 realized in a constructive execution that the first drainage bar 16.1 or the first drainage strips 16.1 on the vacuum cleaner 12 , in particular the housing 25 , are stored.

Regarding the design of the drainage strips 16.1 . 16.2 There are many possibilities. These are usually designed as ceramic strips, which have an inclined surface, so that when they act on the inside of each band 5 or 6 make a wedge with this.

The length of the second dewatering section in all designs may vary. This depends on the desired drainage behavior and the required drainage facilities to be provided in the form of drainage strips, in particular first drainage strips 16.1 and second drainage strips 16.2 and their effect on the between the two endless bands 5 and 6 Forming fibrous web.

The in the 1 to 4 illustrated embodiments illustrate particularly advantageous embodiments. However, the invention is not limited to these embodiments, in particular with regard to the choice of the number, arrangement and storage for the individual drainage strips 16.1 respectively 16.2 in the two endless bands 5 and 6 , Depending on the desired drainage behavior, a corresponding combination of the individual options presented is conceivable.

Furthermore, the solution according to the invention can be used for any formers for tissue machines which are characterized by a double belt area, in particular a double-wire area or a wire-felt area. The solution according to the invention is also independent of the further processing or the process steps which passes through the fibrous web. It is irrelevant whether the leadership is done after crepe cylinder or by a pressing device. The shaper concept should thus be prefaced as a module of subsequent process steps and thus required devices. The single bands - first endless circulating band 5 and second endless circulating band 6 are guided over a plurality of guide devices, in particular guide rollers, wherein in roll design of the former in one of the bands, preferably in the first endless circulating belt 5 , a corresponding forming roller is arranged, for all common Formierwalzenarten come into consideration.

1

machine for producing a tissue web

2

molder

3

Double belt zone

4

outer periphery

5

first endless circulating band

6

second endless circulating band

7

dewatering element

8th

forming roll

9

inlet gap

10

headbox

11

acceptance or separating device

12

Trennsaugeinrichtung

13

inside

14

dehydrator

15.1

first Counterblade assembly

15.2

second Counterblade assembly

16.1

first drainage strips

16.2

second drainage strips

17

Entwässerungssiebband

18

Entwässerungssiebband

19

inside

20

Filzband

21.1

supporting member

21.2

supporting member

22

Untersiebsaugkasten

23

medium for variable adjustment of the contact pressure

24

medium for control

25

casing

26

area

27

first suction zone

28

second suction zone

29

Pressure medium source

I

first dewatering section

II

second dewatering section

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• - EP 1120492 A2 [0002]
• WO 03/062528 A1 [0003]

Claims (22)

Machine ( 1 ) for producing a tissue web, in particular a tissue machine, comprising a former ( 2 ) with two continuous endless bands ( 5 . 6 ) - a first endless circulating band ( 5 ) and a second endless circulating band ( 6 ) - which has a double band zone ( 3 ), and a Trennsaugeinrichtung ( 12 ) for one of the endless bands ( 5 . 6 ) and the fibrous web (F) formed between them, characterized in that in the double-belt zone ( 3 ) a drainage device ( 14 ) comprising at least one drainage strip ( 16.1 . 16.2 ) attached to one of the two bands ( 5 . 6 ) is effective, is arranged. Machine ( 1 ) according to claim 1, characterized in that the drainage device ( 14 ) of the separating suction device ( 12 ) is connected upstream. Machine ( 1 ) according to claim 1 or 2, characterized in that the drainage device ( 14 ) one, at least one drainage strip ( 16.1 . 16.2 ) having drainage strip arrangement ( 15.1 . 15.2 ), which on the inside ( 13 . 19 ) one of the two bands ( 5 . 6 ) is effective. Machine ( 1 ) according to one of claims 1 to 3, characterized in that the drainage device ( 14 ) a the first volume ( 5 ) associated first Entwässerungsleistenanordnung ( 15.1 ) with at least one first drainage strip ( 16.1 ) and a second volume ( 6 ) associated second Entwässerungsleistenanordnung ( 15.2 ) with at least one second drainage strip ( 16.2 ), wherein the first and second drainage strips ( 16.1 . 16.2 ) viewed in the direction of tape travel in the axial direction are arranged offset from each other. Machine ( 1 ) according to one of claims 2 to 4, characterized in that a plurality of drainage strips ( 16.1 . 16.2 ) of a drainage strip arrangement ( 15.1 . 15.2 ) on a common support element ( 21.1 . 21.2 ) are stored. Machine ( 1 ) according to one of claims 1 to 5, characterized in that the the band (F) continuing the band ( 5 ) associated Entwässerungsleistenanordnung ( 15.1 ) on the housing ( 25 ) of the separating suction device ( 12 ) is stored. Machine ( 1 ) according to one of claims 1 to 5, characterized in that the the band (F) continuing the band ( 5 ) associated Entwässerungsleistenanordnung ( 15.1 ) in the separating suction device ( 12 ) is integrated. Machine ( 1 ) according to one of claims 2 to 7, characterized in that the individual drainage strip ( 16.1 . 16.2 ) of a drainage strip arrangement ( 15.1 . 15.2 ) is rigidly mounted. Machine ( 1 ) according to one of claims 1 to 8, characterized in that the individual drainage strip ( 16.1 . 16.2 ) of a drainage strip arrangement ( 15.1 . 15.2 ) is spring-mounted. Machine ( 1 ) according to one of claims 1 to 9, characterized in that the contact pressure of a single drainage strip ( 16.1 . 16.2 ) of a drainage strip arrangement ( 15.1 . 15.2 ) is variably adjustable. Machine ( 1 ) according to claim 10, characterized in that the drainage strip ( 16 . 16.1 . 16.2 ) is hydraulically or pneumatically or mechanically pressed. Machine ( 1 ) according to one of claims 1 to 11, characterized in that the first endless circulating belt ( 5 ) and the second endless circulating band ( 6 ) as drainage screen belts ( 17 . 18 ) are formed. Machine ( 1 ) according to one of claims 1 to 11, characterized in that one of the two endless circulating belts ( 5 . 6 ) as a drainage filter belt ( 17 . 18 ) and the other endless circulating band as a felt band ( 20 ) is carried out, wherein the acceptance or separation device ( 12 ) the felt belt ( 20 ) and on the inside ( 13 ) of the felt belt ( 20 ) becomes effective. Machine ( 1 ) according to one of claims 12 or 13, characterized in that the individual dewatering screen belt ( 17 . 18 ) is formed with different Siebdurchlässigkeit. Machine ( 1 ) according to one of claims 2 to 14, characterized in that the active surfaces of the individual drainage strips ( 16.1 . 16.2 ) of a single dewatering strip assembly ( 15.1 . 15.2 ) are arranged such that they describe a flat surface. Machine ( 1 ) according to one of claims 2 to 14, characterized in that the active surfaces of the individual drainage strips ( 16.1 . 16.2 ) of a single dewatering strip assembly ( 15.1 . 15.2 ) are arranged such that they describe a curved surface. Machine ( 1 ) according to one of claims 1 to 16, characterized in that the individual drainage strip ( 16.1 . 16.2 ) can be combined with a suction device. Machine ( 1 ) according to one of claims 1 to 17, characterized in that the Trennsaugeinrichtung ( 12 ) at least one suction zone ( 27 ). Machine ( 1 ) according to one of claims 1 to 18, characterized in that the separating suction device ( 12 ) at least two successively viewed in the strip running direction suction zones ( 27 . 28 ), which are individually controllable. Machine ( 1 ) according to one of claims 1 to 19, characterized in that the separating suction device ( 12 ) is designed as a flat vacuum cleaner. Machine ( 1 ) according to one of claims 1 to 19, characterized in that the separating suction device ( 12 ) as a vacuum cleaner with a curved surface ( 26 ) is executed. Machine ( 1 ) according to one of claims 1 to 21, characterized in that the former ( 2 ) is designed as a roll former, comprising a forming roller ( 8th ), partly from both bands ( 5 . 6 ) is wrapped to form an inlet gap ( 9 ) for those of a headbox ( 10 ) introducable pulp suspension (S).