JPH08109589A - Drier for travelling web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dryer device for a running web with reduced web breaks even during high-speed operation, especially a dryer section of a paper machine or a paper treating machine. SOLUTION: This drying device is obtained by installing at least one heatable drying cylinder contacting a web in each continuous cylinder group in a dryer section and each cylinder has an inherent drive device. At least one two-felt cylinder group 17 is provided and a web 9 alternately runs in a meandering state on an upper cylinder in contact with a felt F in the upper part and on a lower cylinder in contact with the felt F in the lower part. At least one auxiliary cylinder group 37 having an inherent auxiliary drive device is arranged adjacently to the 2-felt cylinder group 17. A web free passage equipped with an end cutter is provided between the 2-felt cylinder group 17 and the auxiliary cylinder group 37.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running web dryer (eg, the drying section of a paper machine).

BACKGROUND OF THE INVENTION The drying section is disclosed in DE-A-4328554 and is divided into a number of consecutive cylinder groups. Each of the cylinder groups is generally in contact with the web, for example via gears and / or endless support belts (“felt”),
It includes a number of heatable drying cylinders coupled to a common drive which determines the operating speed of the cylinders.

In the above-mentioned German Publication No. 4328554,
As with the subject matter of the present invention, it is disclosed that the beginning section of the drying section is preferably provided with a large number of single felt cylinder groups which may be of completely different design.
On the other hand, at the end of the drying section, at least one 2
A felt cylinder group is provided. In many cases, two (or three) groups of two felt cylinders of this kind, each having an upper cylinder row and a lower cylinder row, are preferred, and the web runs alternately on the upper and lower cylinders. An unsupported free web path is provided between the cylinders. Each two-felt cylinder group has its own drive. The term “felt” includes present day general purpose porous (endless) dry woven fabrics.

The above invention relates to the problem of introducing a paper web into a paper machine or paper processor (eg at machine start-up or after an accidental break of the paper web). This paper web loading operation is, as is well known, generally performed at all operating speeds. As is well known, the paper web is introduced into the broke pulping system as broke only when the paper web reaches a predetermined position (eg, the end of the drying section) during introduction. At the same time, at one of the two web edges, the first thin web portion ("edge strip") is cut from the web by the end cutter. First, the edge strip is transferred to a subsequent unit (for example, a calendar unit, a winding unit or a coaching unit). The end cutter then runs to the other web edge, thus the transferred web portion eventually becomes the full web width. Normally, the end cutters are arranged in the end area of the two-felt cylinder group or the last two-felt cylinder group (see above-mentioned DE-A-4328564, FIGS. 1, 12 or 13).

The above-mentioned method is generally carried out in a large number of paper machines, and also in a paper machine having a relatively high operating speed, and has achieved good results. However, it is desirable to be able to more reliably transfer the paper web from the drying section to subsequent units. In this case, it is generally considered that the operating speed is intended to be further increased to the range of approximately 1600-2400 m / min. In this case, the risk of breaking the paper web during end cutting is increased. In such cases, a large amount of broke that accumulates in a short time does not always reliably and reliably descend into the broke pulping system and instead of broke scrap sometimes remains unrestrained in the drying section. Add problems.

SUMMARY OF THE INVENTION The invention is based on a drying device for drying running webs so that the risk of web breaks during end cutting is eliminated as much as possible, even at increasing operating speeds. It relies on the objective of further developing and improving (eg, the drying section of a paper machine or paper processor). This is essentially true both for the drying section of the paper machine and for the dryer of the paper processor (eg, coating machine).

[Means for Solving the Problems] The above object and another object are to provide a plurality of continuous cylinder groups, each cylinder having an individual driving device (wherein at least one cylinder of each group can be heated, Including a drying cylinder,
And in contact with the traveling web); at least one cylinder group including two felt cylinder groups, wherein the web alternates over an upper cylinder contacting the felt at the top and a lower cylinder contacting the felt at the bottom. At least one auxiliary cylinder group provided with an auxiliary drive and adjacent to the two felt cylinder groups; between the two felt cylinder groups and the auxiliary cylinder groups A running web dryer including a web free path disposed and not felt supported; and an end cutter positioned in the web free path;
In particular, it is achieved by the drying section of a paper machine or paper processor.

In the case of the device according to the invention, preferably the drive of the two-felt cylinder group and the drive of the auxiliary cylinder group following the two-felt cylinder group are of the operating speed of the auxiliary cylinder group and of the two-felt cylinder group. Connect to a common control unit that can set the ratio to the operating speed to a specific value. It is preferable that the ratio for normal long-term operation be different from the ratio for the case of truncation.

In the case of the device according to the invention, furthermore, means by which the common control unit can a) set the operating speed of the auxiliary cylinder groups to be equal to or slightly smaller than the operating speed of the two felt cylinder groups in a normal manufacturing operation. And b) means for setting the operating speed of the auxiliary cylinder group to be slightly higher than the operating speed during normal manufacturing operation during operation of the end cutter, thus setting the web longitudinal tension required for end cutting. Is preferred.

It is essential that there is a web free path for the positioning of the end cutter, which lies in the end of the drying section and in which the longitudinal tension of the web can be set for end cutting requirements.

Common to each of the first embodiment groups of the invention, there is always a web free path at the end of the two-felt cylinder group for the end cutter. By the above means
The important advantages of the drying section disclosed in DE-A-4328554 mentioned above are retained, in particular the following advantages. 1. Uniform paper quality, especially the same or nearly the same surface properties on both sides of the paper. 2. If extremely high dry weight (about 98%) is intended,
There is no risk of breaking the paper web as the longitudinal tension is distributed over the two felt cylinder groups. 3. Felt (dry woven) wear is significantly reduced compared to a dry section having only a single felt cylinder group.

The web free path for the end cutter may be (or need not be) the so-called felt separation point.
In this case, the felt of the two-felt cylinder group returns from the above point to the start of each group. That is, the following auxiliary cylinders have at least one auxiliary felt uniquely for further guiding the paper web behind the felt separation point.

In another variation of the first embodiment of the invention, the web free path for the end cutter is such that at least one of the two felts of the two-felt cylinder group is between two drive groups. Is to bridge the separation point of. In other words, one (or more) felt
Bridge the "boundary" between the two felt cylinders and the following auxiliary cylinders. The "boundary" is preferably bridged by only one of the two felts. That is, at this "boundary", one of the two felts of the two-felt cylinder group returns to the beginning of the cylinder group. In this case, the other of the two felts is extended and then runs on the cylinders of the auxiliary cylinders, which are the single felt cylinders (with their own drive). In this case, this extended felt is pulled at the "boundary" by the drive of the auxiliary cylinders when trying to tension the paper web during end cutting. However, 2 felts
By the time it returns to the beginning of the cylinder group, this tension state of the felt disappears again.

The auxiliary cylinders that follow the end cutter can have a very different number of cylinders. In many cases, 1-3 cylinders are sufficient. However, if a very high final dry weight of the web is intended, for example 98%, this number can be increased from 4 to for example 8.

The above summary of the invention indicates that one felt is two
Although the embodiment relates to bridging the separation points between two drive device groups, it is also applicable to the second embodiment group. In the case of the embodiment described above, it is possible to provide two groups of adjacent cylinders, each with its own drive. Each of the above cylinder groups
It is possible to have multiple cylinders, but in extreme cases
Only one cylinder can be provided for each group. All cylinders in the two groups contact the same side of the web. This is because only endless single felt is associated with the cylinder. That is, the felt bridges the boundary between the two cylinder groups. That is, the above description can be said to relate to a single felt cylinder group divided into two driving devices. The exact term is not important. This is because devices of this type are described in various terms. At the boundary between the two drives, the felt travels from one cylinder via the felt guide roll to the next cylinder, while the paper web is not in contact with the felt before reaching the next cylinder. Detour via (cylinder). A free web path thus exists in the area of the boundary for the end cutter, and on the basis of two separately controllable drives, the end web can be set to the optimum longitudinal web tension.

A drying device of this kind according to the invention can firstly (but not exclusively) be used in a paper processing machine (for example a coating machine).

Embodiments Other features and advantages of the present invention will be apparent from the following description of the present invention with reference to the drawings.

Description will be made with reference to the drawings. The drying section shown in FIG. 1 has six single felt / single groups 11-16 arranged in sequence. Each of the cylinder groups has an endless single felt F.
For example, in the first cylinder group 11, the felt F is
The web 9 and the web 9 alternately run on a drying cylinder 51 and a deflection roll 51 '(the deflection roll is preferably called a suction roll). First two cylinder groups 1
In the first and the second cylinder groups 14 and 16, the lower surface of the web contacts the cylinders. Accordingly, the drying cylinders 51, 52, 54, 56 are above the associated deflecting suction rolls 51 ', 52', 54 ', 56'. That is, the cylinder is described as "contacting the felt at the top." However, the situation is different in the third cylinder group 13 and the fifth cylinder group 15. That is, in this case, the cylinders 53 and 55 contact the upper surface of the web. Thus, the cylinder is "underneath the felt" and is below the associated deflecting suction rolls 53 ', 55'. Therefore, the separation point between the cylinder groups 12-16 is defined as a so-called diversion separation point. For more information on the above conversion break points, see German Patent Application P43111351.

As is apparent from FIG. 1, at each of the above conversion breaks, the paper web 9 has a short free tension state (op).
en draw) is formed. That is, the web is temporarily not supported by felt. The web travels the small suction area of the transfer roll 58 to the next felt. FIG.
In the above, the transfer rolls 58 are suction rolls each having a stationary suction box inside. On the other hand, the deflecting suction rolls 51'-56 'do not include a stationary built-in adapter and direct suction connector. Instead, each of the deflection suction rolls is provided with an external suction box 59. This suction box 59 is in a so-called pocket between two adjacent drying cylinders,
At the point where the felt F and the web 9 together leave the first of these two cylinders, there is a strip (not shown) that pulls away and deflects the air boundary layer transported along the felt.

The last single felt cylinder group 16
Behind, there are several lower cylinders 57, several upper cylinders 57 ', a lower felt UF and an upper felt OF.
There follows a group of two felt cylinders 17 with. The web then travels to the auxiliary cylinder group 18 via the web free path provided with the end cutter S. This group of auxiliary cylinders has cylinders 58, 58 'that are commonly driven but separately contact the felt.

The drying section of the embodiment shown in FIG.
For example, having three (or four or five or more) single felt cylinder groups 21-23. However, unlike FIG. 1, these cylinders all contact the felt at the top. In other words, all the drying cylinders 71-73 are in contact with the underside of the web. Further, unlike FIG. 1, the deflection suction roll 71′-7
3'has an internal immovable suction box and is arranged very slightly away from the adjacent drying cylinder. Furthermore,
For example, the upper cylinders 74 and 75 and the lower cylinder 7
Two (or three or more) groups of 2 felt cylinders 24, 25 with 4 ', 75' and a group of auxiliary cylinders 26 are provided, the web free path in front of which also has a terminal end. A cutter S is provided. The latter group of cylinders is in a row and contacts the felt at the bottom.

In the case of the drying section of FIGS. 1 and 2, the cylinders are always arranged in a horizontal row, but in the case of the embodiment of FIG. 3 it is constructed as follows. That is, in order to reduce the total structural length of the drying section, a single felt
The cylinders of the cylinder group 31-35 are DE404149.
As disclosed in No. 3, it is arranged as a number of rows inclined with respect to the vertical direction, that is, as rows alternately inclined forward and backward. The two V-shaped strings are the first cylinder group 31.
And the second cylinder group 32 is formed. The cylinders 81, 82 of these two cylinder groups contact the felt at the top. Behind these groups of cylinders are two groups of cylinders 33, 34 which in the lower part contact the felt. The third (e.g., three (or four or more) cylinders 83 of the third group of cylinders form a rearwardly inclined row. On the other hand, the cylinders 84 of the fourth cylinder group form a row inclined forward. These two cylinder groups 33, 3
A gap can be formed between the lowest cylinders of No. 4 by the swivelable felt guide roll 87 for removing the broke downward.

The fifth cylinder group 35 is in contact with the felt only at the upper part, and similarly, a drying cylinder 85 forming a V-shaped row.
Have. Behind the last cylinder of this cylinder group 35, the web is guided obliquely downward to the first two cylinders 86 of the next two-felt cylinder group 36. Following the cylinder group, there is also an auxiliary cylinder group 37 and an end cutter S. The web free path for the end cutter S extends from bottom to top. Therefore, preferably two cylinders 87 and the deflection roll 8 between these cylinders
A cylinder group 37 with 7'contacts the felt at the top. Thus, the broke can be easily guided downward from the cylinder 87.

Unlike the DE 4041493 mentioned above, all the deflection suction rolls 81'-85 'arranged between two cylinders in each cylinder group are arranged at a distance from the cylinders and Equipped with a suction box. This structure not only can be manufactured at low cost, but also contributes to energy saving. Because there is an extended free vaporization path between each two cylinders,
Therefore, drying is more economical. This also applies to the configuration of FIG.

Unlike FIG. 3, the fifth single felt
Instead of the cylinder group 35, a group of two felt cylinders (two rows) (similar to 36) can be provided.

FIG. 4 shows the cylinder groups 36 and 37 of FIG. 3 in detail. As shown schematically in FIG. 4, 2 felts
In the cylinder group 36, the two last cylinders (upper and lower cylinders) have a common drive with an electric motor M. Another cylinder of the 2 felt cylinder group 36 is
For example, it is driven via felts OF, UF or by an auxiliary drive (not shown). The auxiliary cylinder group 37 likewise has its own drive with an electric motor M ′. That is, the auxiliary cylinder group may have cylinders other than the two cylinders 87, as indicated by the two broken circles 87 ″. The diameter of the cylinder 87 may be smaller, larger or equal to the diameter of the cylinder 86/86 '.

Both electric motors are connected to the control unit 40 separately from each other. Thus, if desired, the operating speed of the auxiliary cylinder group 37 and the operating speed of the two-felt cylinder group 36 can be set to a special ratio, and thus a preferred longitudinal web tension for end cutting can be created in the web free path. Thus, a reliable operation of the end cutter S is achieved. In particular, web breaks during the operation of the end cutter can be avoided. However, during normal manufacturing operations, if desired, the ratio between the motor operating speeds can be set to a value that is somewhat different than the ratio during end-cutting in order to distribute the longitudinal tension within the web 9.

Based on the embodiment of FIG. 5A, a two-felt cylinder group 90 (partially shown) and an auxiliary single-felt cylinder group 91 that are in contact with the felt at the top are shown.
(Partially shown). The last cylinder 92 of the two-felt cylinder group 90 is in the top row of cylinders and therefore contacts the felt at the top. The paper web 9 to be dried is transferred from the two-felt cylinder group 90 to the single-felt single group 91, so that the felt 93 of the single-felt cylinder group contacts a small portion of the peripheral edge of the cylinder 92. Immediately before this contact, felt 9
3 runs via an adjustable guide roll 94. For the purpose of end-cutting, this roll 94 is placed in the position shown in phantom, so that the felt runs directly from the roll 94 to the first deflecting roll 95 (which may be a suction roll). Therefore, the paper web 9 travels from the cylinder 92 to the deflecting roll 95 without being supported by the felt 9. Therefore, the end cutter S can be provided in this web free tension path. This type of end cutter arrangement is similar to that described in US Pat. No. 5,248,390.

Another advantageous end cutter arrangement is shown in FIG. 5 (B). 5B differs from FIG. 5A in the following points.
That is, the paper web 9 always runs from the last cylinder 92 of the two-felt cylinder group 90 through the web free path to the suction guide roll 95, where the vacuum causes the felt 93 of the next single-felt single group 91 to be felt. Sucked on. This felt 93 then guides the paper web through the group 91 in a known manner. Terminal cutter S
Is also provided in the range of Web Shirayuji.

The embodiment of FIG. 6 is illustrated only in that the two-felt single group 36 'and the auxiliary cylinder group 37' (which are the single-felt cylinder groups that contact the felt at the top) have a common upper felt OF '. Different from 4. However, the drive devices 38, 39 are the same as in FIG.

The embodiment of FIG. 7 is similar to the extent of the drying section of FIG. In the case of FIG. 1, the cylinders 58, 58 ′ of the auxiliary cylinder group 18 have unique felts, but in the case of FIG. 7, they are configured as not shown. That is, both cylinder groups 17 'and 18' have a common upper felt OF '.
And a common lower felt UF ′. However, each cylinder group 17 ', 18' has its own drive 38 ', 39', as in FIG. The end cutter S is
Similarly, a paper web 9 is provided at the point of transition from the last cylinder of the cylinder group 17 'to the first cylinder of the cylinder group 18' via the web free path.

The embodiment of FIG. 8 is similar to the embodiment of FIG. A group of two felt cylinders 36 ″ and a group of auxiliary cylinders 37 ″, which also contact the felt at the upper part, are provided, both cylinder groups having a common upper felt OF ′. The auxiliary cylinder group 37 ″ includes, for example, three drying cylinders and a grooved deflecting roll between each of the two drying cylinders. 2 felt cylinder group 36 '
Felt guide rolls are arranged at ′ so that the web free path between the cylinders is shortened. That is, since the web free path of the end cutter S is as short as possible, the last upper cylinder of the cylinder group 36 ″ and the auxiliary cylinder group 37
A felt guide roll 99 having a relatively large diameter is provided between the first cylinder of ″ and the upper felt,
Traveling through the guide rolls, both web paths are tangential to the guide rolls.

FIG. 9 shows a coating machine having an associated group of drying cylinders according to the present invention. As shown in FIG.
A web material 101 (e.g., a paper web) is fed from a plurality of drying cylinder groups as shown in FIGS. 1-3 through a web guide roll 102-107 to a first coating station 1.
Drive to 08. The coating station 108 includes a coating roll 110, a counter roll 111 that faces the coating roll and forms a pressing nipper together with the coating roll.
And an applicator 113.

Downstream of the first coating station 108 is a web guide roll 112 which deflects the web material traveling diagonally upward from the pressing nipper essentially vertically upward. Thus, the web reaches the infrared dryer 115 and then two other web guide rolls 116,1.
Guided by 17, it passes through a hot air dryer 118.
The web material is then web guided rolls 119, 12
0 to the first contact drying cylinder group 121.

The group 121 has at least two drying cylinders 122, 1 which have a drive which can be controlled independently of one another and a common lower felt 123 which is in contact with the felt at the lower part.
Rows of 24 are arranged. Felt is especially 2
Felt guide roll 12 arranged between two cylinders
Drive through 5. The paper web leaves the lower felt at the felt guide roll 125, runs freely to the auxiliary paper guide roll 126, and then passes from the roll 126 through the position of the end cutter S to the cylinder 124.
If desired, the paper guide roll 126 can have its own drive. In the case of the illustrated embodiment, the cylinder 1
22 and the two electric motors M of the paper guide roll 126 are connected to the center control unit 40 via a common control wire 127.
Is joined to. However, these two electric motors can be controlled independently of each other.

The second cylinder 124 has an independent control conductor 1.
It is essential to have a unique drive with an electric motor M'coupled via 28 to the center control unit 0. If necessary, another further felt guide roll 12
9 can be provided with a drive M ′.

The web 101 runs from a cylinder 124 to another cylinder 130 which is in contact with the felt at the top and then a second coating station 108 'essentially designed as a mirror image of the first coating station 108.
Drive up to. In the drawings, components corresponding to each other are designated by the same reference symbols.

After exiting the coating station 108 ', the web material 101 again passes through the infrared dryer 115. The web material is then introduced via a deflecting device 139 into a hot air dryer 131 which acts without contact with the web. The web material then travels through the spreading rolls 138 into the second group of contact drying cylinders 140.

The cylinder group also comprises two dry singles 132, 134 having a single felt 133 and which can be driven separately from each other. The felt travels between the cylinders via the felt guide rolls 135, while the paper web 101 leaves the felt at the felt guide rolls and travels freely to the paper guide roll 136 and then reaches the cylinder 134. Similarly, the independent drive of the two cylinders 132, 134 allows the longitudinal web tension to be set approximately at the position of the end cutter S.

FIG. 9 shows yet another end cutter position S'between the spreading roll 138 and the drying cylinder 132.

It will be appreciated that the end cutter S can only work if the paper web 101 has reached the position of the end cutter over the full web width. Before this, the paper web first passes through the coating machine in the form of thin edge strips. For the proper introduction of thin edge strips,
A rope feed mechanism known per se (as is customary in coating machines) is provided. This mechanism includes cylinders and guide rolls (eg, 122, 125, 12
6, 124, 130) and two endless ropes (14 in FIG. 9) that pull the edge strips to the point of arrival of the machine.
1, 142). Therefore, no special, eg pneumatic, auxiliary equipment required for ropeless introduction of edge strips is required.

Further, the auxiliary cylinder groups 18, 26, 37,
91, etc. In, at least one cylinder can optionally be heated, for example by steam, and cooled by a suitable refrigerant. Furthermore, depending on the requirements of the various paper qualities to be produced, at least one cylinder can be alternately heated and cooled.

Another end cutter position S between at least one of the lower cylinders that contact the felt 124 and the upper cylinder that contacts the felt 130 is S.
It is indicated by a. In this case, the felt guide rope 125 is removed. Both the felt 123 and the web 101 travel via the roll 126. Paper guide roll 13
6 has its own drive, the first cylinder 13
Two electric motors (not shown) of the two and the paper guide roll 136 can be coupled to the central control unit at the same time and so that they can be controlled separately from the electric motor of the second cylinder 134.

As shown in FIGS. 9 and 10, the guide roll 12
The pocket formed in the web by 6.136 is provided at the installation location of the end cutter S. An advantage of the structure shown in FIGS. 9 and 10 is that the web free path (where the end cutter bites into the web) is relatively short. However, the pocket is large enough to place the end cutter within the pocket. The relatively short web free path improves the reliability of the end-cutting operation, ie the risk of web breaks during end-cutting is minimized. Furthermore, this structure can be used without providing a drive for every cylinder.

Although the invention has been described with reference to specific embodiments, many modifications and applications will be apparent to those skilled in the art.

[Brief description of drawings]

1 is a schematic side view of a plurality of different drying sections of a paper machine according to the present invention.

FIG. 2 is a schematic side view of a plurality of various drying sections of the paper machine according to the present invention.

FIG. 3 is a schematic side view of various drying sections of a paper machine according to the present invention.

FIG. 4 is an enlarged view of an end area of the drying section of FIG. 3 and a detailed view of a control unit of each driving device.

5 (A) is a schematic side view of the end areas of various drying sections according to the present invention, and FIG. 5 (B) is a schematic side view of the end areas of the modified drying section of FIG.

FIG. 6 is a schematic side view of the end area of various drying sections according to the present invention.

FIG. 7 is a schematic side view of the end area of various drying sections according to the present invention.

FIG. 8 is a schematic side view of the end area of various drying sections according to the present invention.

FIG. 9 is a drawing of a paper coating machine having associated drying cylinders according to the present invention.

FIG. 10 is a drawing of another embodiment of the present invention.

[Explanation of symbols]

 9 Web 11-16 Single felt cylinder group 17 2 Felt cylinder group 37 Auxiliary cylinder group 51-56 Drying cylinder 51'-56 'Deflection suction roll F Felt S End cutter

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hans-Jürgen Wurz Germany 89520 Heidenheim Inselstraße 11 (72) Inventor Wolfgang Meyer Germany 89522 Heidenheim ul Acher Weg 10 (72) Inventor Dieter Herbig Germany 89555 Steinheim Hegelstraße 30

Claims (33)

[Claims] 1. A running web dryer, in particular in a dryer section of a paper machine or paper processor: (A) a plurality of consecutive cylinder groups each having an individual drive, wherein at least one of each group is used. (C) at least one group of cylinders, including two felt cylinders, wherein the webs are felt at the top; (C) at least one auxiliary cylinder provided with an auxiliary drive and adjoining said two felt cylinder groups, wherein the upper roller is in contact with the upper roller and the lower roller in contact with the felt is alternately meandering; A group; (D) a web free path not supported by a felt disposed between the two felt cylinder groups and the auxiliary cylinder group; Apparatus characterized by including; and (E) the web free path arranged end cutter. 2. The apparatus of claim 1 wherein said non-felt web free path is provided between cylinders in at least one of said two felt cylinder groups. 3. The auxiliary cylinder group comprises at least one upper felt for at least one upper cylinder, and at least one upper felt.
The apparatus of claim 1 having a lower felt for two lower cylinders. 4. The apparatus of claim 1 wherein said auxiliary cylinder group comprises a single felt cylinder having at least one cylinder. 5. The device of claim 4, wherein the group of auxiliary cylinders comprises at least two cylinders. 6. The apparatus of claim 4, wherein the group of auxiliary cylinders has a unique felt. 7. One of two felts of said two-felt cylinder group is extended and further runs on a cylinder of an auxiliary cylinder group.
Equipment. 8. The last cylinder of the two-felt cylinder group contacts the felt at the top, and in the auxiliary cylinder group, at least the first cylinder following the two-felt cylinder group contacts the felt at the bottom. The apparatus of claim 1 characterized. 9. The felt according to claim 8, wherein all the cylinders of the auxiliary cylinder group are in contact with the felt at the lower part.
Equipment. 10. The last cylinder of the two-felt cylinder group touches the felt at the bottom and in the auxiliary cylinder group, at least the first cylinder following the two-felt cylinder group touches the felt at the top. The apparatus of claim 1, wherein 11. The apparatus of claim 10, wherein all cylinders of the auxiliary cylinder group contact the felt at the top. 12. The driving device for the two-felt cylinder group and the driving device for the auxiliary cylinder group that follows the two-felt cylinder group have an operating speed of the auxiliary cylinder group and a speed speed of the two-felt cylinder group. Device according to claim 1, characterized in that it is coupled to a common control unit which sets the ratio between the two to a specific value. 13. Device according to claim 12, characterized in that said ratio for normal long-term operation of the device is different from the ratio for truncation. 14. The common control unit comprises: a) means for setting the operating speed of the auxiliary cylinder group to be equal to or slightly lower than the operating speed of the two-felt cylinder group during normal manufacturing operation; and b). Means for setting, during operation of the end cutter, the operating speed of the auxiliary cylinder group to be slightly higher than the operating speed during normal manufacturing operation, thus setting the web longitudinal tension required for end cutting. 13. The apparatus of claim 12 characterized. 15. At least one of the groups of cylinders preceding said two-felt cylinder group comprises a single-felt cylinder group, in which endless single-felt and web are both on-cylinder and deflecting rolls. The device according to claim 1, wherein the device travels in a meandering state alternately on the top. 16. The apparatus of claim 15, wherein the deflecting roll comprises a suction roll. 17. Device according to claim 1, characterized in that at least one cylinder of the auxiliary cylinder group can be optionally heated or cooled. 18. Apparatus according to claim 17, characterized in that at least one cylinder of the auxiliary cylinder group can be alternately heated and cooled, corresponding to the respective paper quality requirements to be produced. 19. In a drying section of a running web, in particular in a drying section of a paper machine or a paper processor: (A) a plurality of consecutive cylinder groups, each with individual drives, wherein at least one cylinder of each group Heatable, including a drying cylinder, and adapted to come into contact with the traveling web; (B) two such cylinders, which directly follow each other and do not include a group of single felt cylinders having a common single felt Groups, where each of the single felt cylinder groups has at least one drying cylinder; (C) disposed between two adjacent cylinders of each single felt cylinder group and only in contact with the web And thus (D) arranged in the web free path, which provides a web path free of felt support; Apparatus characterized by including; end cutter was. 20. Two of each cylinder felt / cylinder group
20. The apparatus of claim 19, wherein two adjacent cylinders are driven independently of each other. 21. The apparatus of claim 19 further comprising a felt guide roll disposed between two adjacent cylinders of a single felt cylinder group. 22. A web free path provided with an end cutter,
20. Apparatus according to claim 19, characterized in that the web guide roll is reached to the next cylinder. 23. Two of each single felt cylinder group
21. Device according to claim 20, characterized in that the drives of two adjacent cylinders are coupled to a common control unit which allows the ratio between the operating speeds of the two cylinders to be set to a specific value. 24. The ratio for normal long-term operation of the device is
24. The device of claim 23, which has a different numerical value than the ratio in the case of truncation. 25. A common control unit comprises: a) in normal manufacturing operation the operating speed of a downstream cylinder of two adjacent cylinders equal to or less than the operating speed of an upstream cylinder of two adjacent cylinders. B) during the operation of the end cutter, the operating speed of the downstream cylinder of the two adjacent cylinders is set slightly higher than the operating speed during normal manufacturing operation, thus required for end cutting 24. The apparatus of claim 23, including means for setting a different web longitudinal tension. 26. In a running web drying device, in particular in the drying section of a paper machine or paper processor: (A) at least a first of a series having a common single felt, each cylinder in contact with the same side of the web. A second drying cylinder; (B) a felt guide roll disposed between the two cylinders; and (C) a guide roll disposed between the two cylinders and in contact only with the web. D) From the web guide roll to the second cylinder,
An end cutter disposed in the web free path that is not felt-supported; 27. The apparatus of claim 26, wherein each cylinder has its own drive. 28. The apparatus of claim 28, wherein the web guide roll has a drive coupled to the drive of the first cylinder. 29. The web pocket comprises: a) a second cylinder through a felt guide roll from a first cylinder.
B) a web that travels to a cylinder; b) a web guide roll; C) a web that travels from a first cylinder through a web guide roll to a second cylinder; and the end cutter is located in the pocket. 27. The device of claim 26, wherein 30. In a drying device of a running web, in particular in the drying section of a paper machine or paper processor, (A) a continuous single at least first, with a common single felt, each in contact with the same side of the web. A second drying cylinder; (B) a felt guide roll disposed between the cylinders; (C) a web guide roll disposed between the two cylinders and in contact with the web only; (D) An end cutter disposed in a web free path extending from the first cylinder to the web guide roll without being supported by the felt; 31. The apparatus of claim 30, wherein each cylinder has its own drive. 32. The apparatus of claim 30, wherein the web guide roll has a drive coupled to the drive of the second cylinder. 33. Pockets in the web include: a) the felt running from the first cylinder through the felt guide roll to the second cylinder; b) the web guide roll; c) the first. 31. The apparatus of claim 30 formed by: the web running from a cylinder through the web guide roll to the second cylinder, the end cutter being located in the pocket.