FI124218B - System in a drying section of a web forming machine for controlling the wire and further web by directional rollers - Google Patents

Description

SYSTEM ON THE DRYING MACHINE DRYING PART FOR CONTROLLING THE WIRE AND CONTINUOUS RAW BY GUIDELINES

The present invention relates to a system for guiding the wire and further the web on the dryer section of the forming machine 5 by guiding rolls, at least one of which is supported by a wire supported by the wire.

FI 102623 is known in the art. This patent discloses a system in which paper is dried with a blowing unit forming part of a forming machine. In the blowing unit, the wire and web are preferably guided by guide rollers. The wire and indirectly the web contact the guide rolls on the blowing unit less than 30 °. The final guide roll of the top-15 holding unit is a suction roll, from which the web is transferred to the next drying unit. The wire and indirectly the web contact the suction roll on the final guide roll of the blowing unit less than 90 °.

Patent application FI 20002429 is also known in the art. That patent application discloses a vertical on-blowing unit in which the wire and indirectly the web contact the guide rolls on the vertical blowing unit less than 30 °.

25

With prior art blowing units, the wire q and web pass between the cylinders in a common straight run. In this case, a closing gap is formed between the tissue and the guide roll, on which the tissue enters. Moving towards that pita

CVJ

The web, wire, and cylinder surface exert an overpressure on the closure g through the boundary layer flows carried by it.

is ^ The overpressure in the closing gate causes a differential pressure across the wire and co g web, causing runnability problems.

g Increasing web speeds further increase the overpressure problem of the closing kid.

2

In order to hold the wire and the web in connection with the guide rolls, i.e. to eliminate the overpressure formed in the closing piston, the suction rolls are used as the guide rolls. The suction roll is typically a sector suction roll, whereby only the desired 5 sectors are sucked through. The use of a sector suction roll requires less airflow than the suction roll that absorbs the entire surface of the diaper. Overpressure peaks are also removed with suction boxes and by combining suction cups and suction rollers. However, such devices require a strong vacuum or airflow, the production of which requires a considerable amount of energy. The cost of energy is very significant. In addition, the suction rollers become dirty and difficult to clean. The suction rollers also have wear parts such as seals.

15 FI 105573 discloses a roll in which the open surface structure is openly connected by means of supports to the roll axis. In the publication, the roll is shown in connection with the single-wire feed of the dryer section of the papermaking machine used, whereby the roll generates an air flow through it. The web and indirectly the web 20 typically touch the rotating roll about 220 °. More generally, the web and indirectly the web contact the rotating roll over 180 °.

Patent application FI 20031461 discloses a roll in which an open surface structure 25 is connected in a closed manner to the roll axis. Publication? the roll is shown in connection with the single-wire wire passage of the dryer section of the papermaking machine used, whereby the roll generates a vacuum in the coverage area of the fabric and web. Typically, the web and indirectly the web touch the rotating roll about 220.

g 30 More generally, the web and indirectly the web contact the rotating roll over 180 °. co o

LO

1 ^ · US 4,361,466. Further groove track solutions are disclosed in 35 patent applications FI20065241, FI971714 and in § Patent groove tracks arranged within the runnability component

C \ J

3 FI62693. WO2004 / 057105 discloses an arrangement for stabilizing a paper web utilizing a blow box.

The object of the invention is to provide a system by which the energy consumption of the forming machine can be reduced. It is a feature of the present invention that at least one guide roll covered by the web less than 90 ° is a groove roll, wherein the groove roll has adjacent grooves in the transverse direction of the forming machine and the groove roll is adapted to form a vacuum.

10

In the drying section of the forming machine, which expression herein comprises paper machine line drying applications, the wire and further the web are guided by guide rolls. In this context, the forming machine refers to paper, board, tissue and pulp machines. 15 The web covers at least one guide roll less than 90 °. In addition, at least one guide roll covered by the web less than 90 ° is a groove roll. The groove roll has adjacent grooves in the transverse direction of the forming machine. Such a groove roll is adapted to form a vacuum. Vacuum is formed when the grooves are adjacent to each other in the transverse direction of the forming machine 20 and there are no walls perpendicular to the rotational movement. Surprisingly, it has been found that with a deep groove groove roll, very little coverage of the wire supported web helps the roll to create a vacuum in the blanket area. Vacuum is formed in connection with the groove roll in both the opening and closing 25 pins. It is also possible to omit the use of a guide roll in connection with a groove roll which is of light construction, when the wire supported by the web covers the guide roll more than 2 °. Otherwise

CM

? that is, at least one groove roll is idle. In turn, the idle guide rolls co -1- allow for a simpler and more reliable implementation of the guide rollers.

co § In one embodiment, adjacent grooves are separate i-separate pressure zones, the vacuum roll output of the groove roll is better 35 than when the grooves are in the same pressure zone, for example, through the inner structures of the roll.

§ pressure zones in the area covered by the web. With the grooves

CM

4

In another embodiment, the system includes a runnability component between two guide rolls, at least one of which is a groove roll. The guide rolls between which the runnability component is located are on the same side of the wire supported web. 5 The runnability component allows a wide vacuum range. Preferably, the runnability component associated with the groove roll is passive. The passive runnability component has been able to extend the vacuum created by the groove roll into the web supported area of the web between the two groove rolls.

10

The invention will now be described in detail with reference to the accompanying drawings, in which: Figure 1 shows a system according to the invention,

Fig. 2 shows a groove roll for use in the system according to the invention in which the adjacent grooves are in the same pressure zone,

Fig. 3 shows a-20 groove roll used in the system according to the invention, in which adjacent grooves are separate pressure zones,

Figure 4 illustrates a system according to the invention with a runner component between a groove roll and a conventional guide roll; Figure 5a shows a system runnability command with a component of the system according to the invention.

Figure 5c shows the runtime command of a system according to the invention.

X

£ 30 ponentilla, r-. Fig. 6 shows the system according to the invention with a vertical blowing unit, o Fig. 7 shows the system according to the invention with an active runnability component, 35 Fig. 8 shows the system according to the invention with a semi-passive runnability component, 5

Fig. 9 shows a system according to the invention with a passive runnability component,

Figure 10 illustrates a groove roll for use in the system of the invention comprising a plurality of separate zones 5 in the transverse direction of the forming machine; and

Figure 11 illustrates a system according to the invention in which a groove roller comprising a plurality of separate zones is used.

Figure 1 shows a system 10 according to the invention for guiding web 12 10 and further supported by wire 14 on a dryer section of a forming machine. The wire 12 and further the web 14 are guided by guide rolls 16, of which guide rolls 16 cover at least one guide roll 16 below 90 °. In other words, the web covers at least one guide roll from 1 ° to 90 °. The guide roll 16 15 is a roll which guides the web 14. In turn, the support rolls 20 support the wire 12 as a wire twist 18. Between the web 14 and the guide roll 16 there is a wire 12. In other words, the guide 14 does not cover the guide roll directly. Further, at least one guide roll 16 covered by the web 14 below 90 ° is a groove roll 22. The groove roll has adjacent grooves in the transverse direction of the forming machine having a depth a of at least 10 mm, preferably at least 20 mm and adapted. The depth f of the grooves in the groove roll adapted to form a vacuum can be remarkably large. However, the grooves 25 in the groove roll of the invention generally have a depth of up to 100 mm, preferably up to 50 mm. Thus, the grooves have a depth of 10-100 mm, preferably c \ | , 20 to 50 mm.

c \ j cp

C/O

The system 10 shown in Fig. 1 is applied, for example, to an x £ 30 web forming machine blowing unit. The web 14 and the wire 12 cover the first three guide rolls 16 with a cover carrier club less than 30 °. When the guide roll is a groove roll, the overpressure in the closing roll is substantially reduced when the web c 1 is covering the groove roll below 30 °. Preferably, the web covers the groove roll 35 by more than 4 ° so that the negative pressure becomes significant. The web thus preferably covers the groove roll by 4 to 30 °.

6

In the system of the invention shown in Figure 1, two consecutive guide rolls 16 are groove rolls 22. Two successive guide rolls 16, which are groove rolls 22, are on the same side of the web 14 supported by the wire 12. Two successive groove rolls operate independently and are not disturbed by currents each other significantly.

In the system 10 according to the invention shown in Figure 1, there is also a groove roll 22 in connection with the next 10 rolls of fabric 18 'illustrated by two rolls. This groove roll creates a vacuum to stabilize the wire and the wire supported web. Typically, the groove roll in question has a runner component to extend the vacuum to the desired range. Preferably said runnability component 15 is passive.

The system 10 according to the invention shown in Fig. 1 can be operated with a blowing unit. The inflation unit is typically covered by a hood. The hood image shows only snippets of hood 20 at the edges 19.

Fig. 2 shows a groove roll 22 used for guiding the wire 12 and the wire supported web 14 in the system of the invention. The groove roll 22 has a wire 12 with a web 14 thereon. The groove roll 22 has adjacent grooves 24 in the longitudinal direction.

The groove roll 22 has no walls perpendicular to the rotational movement of the groove roll. When the web covers the groove roll, the groove roll creates a vacuum in the region where the web covers the groove roll.

I 30th

In the groove roll 22 shown in Fig. 2, the intervals between the grooves 24 are preferably plate-like and substantially machine-directional. However, the walls are not necessarily in the machine direction but in the groove roll

C \ J

the grooves on the surface may also be rotated in ascending order. 35 The ascending groove can be implemented in a continuous step for the size of the groove roll. On the other hand, there may be several ascending grooves, for example ascending grooves extending from the center to the edges of the groove roll. The inclination angle is less than 15 °, preferably less than 5 °. In this case, the vacuum roll capacity of the groove roll is at a good level, since the walls are not significantly against rotational movement.

5

In the groove roll 22 shown in Fig. 2, the grooves 24 are in the same pressure zone. The grooves 24 are in the same pressure zone as they communicate with each other through the internal structure 26 of the groove roll 22.

Figure 3 shows a groove roll 22 for use in the system according to the invention, in which adjacent grooves 24 are separate pressure zones from the area covered by the web 14. The groove roll 22 in question comprises a central structure 28 and a grooved surface structure 30 between which there is contact, forming essentially a closed structure in which the grooves are open only outside the groove roll. In the case of Fig. 3, the central structure includes a central axis 29. The groove roll can be axially known in the art by means of axle pins, a central axis or a stationary shaft with a grooved casing adapted to rotate. Hereby, the boundary layer flow carried by the roll and the web 20 is utilized by utilizing a vacuum that holds the web in contact with the groove roll. The grooved surface structure creates a vacuum applied to the web by controlling radial forces. The grooves 24 are in the surface structure 30 of the groove roll 22. The grooves 24 are not through holes in the surface structure 30. In this case, the grooves are not in contact with each other through the internal structures of the groove roll ^. Such grooves are separate pressure zones, i.e. pressure units. When the grooves are separate pressure ancestor? the zones provide a more effective vacuum production co with the groove roll than the groove roll with the grooves being the same pressure zones with each other.

N-LO LO In the groove roll 22 shown in Fig. 3, adjacent grooves 24 are structurally spaced apart. Each groove rotates the C \ 1 groove roll only one turn. In addition, the grooves are not in contact with each other through the groove roll internal structures. In this case, each groove has its own pressure zone.

8

However, adjacent grooves which are separate pressure zones are not necessarily structurally separate. In the transverse direction of the web forming machine, adjacent grooves that are separate pressure zones may be structurally, for example, the same spiral, i.e. ascending groove. However, in this case they are separate pressure zones, since one pressure zone begins when the web covers the groove roll and ends when the web comes off the surface of the groove roll. The adjacent grooves are then separate pressure zones from the web-covered area. In the same groove 10, the same revolution also has a second pressure zone on the part of the groove where the web does not cover the groove roll. The grooves in the separate pressure zones are thus structurally separate during the pressure zone.

In the system shown in Figure 3, the depth f of the grooves 24 in the groove rolls 22 used is 10 to 100 mm, preferably 20 to 50 mm. With the grooves in the groove roll being so deep, a vacuum is applied to the part of the groove roll covered by the web as the groove rotates. In turn, the groove width is 6-10 mm. The narrow heels 20 between the grooves are 1-8 mm wide. Preferably, the groove volume is remarkably high compared to conventionally grooved rollers and VAC rollers, in which an active runnability component is used.

Figure 4 shows a system 10 according to the invention in connection with an overhead unit, which system 10 includes a runnability component 32 between two guide rollers 16. The cover unit itself is not shown in its entirety. The fan blade unit hood shows portions of the hood edge 19. The successive x £ 30 guide rollers 16 between which the runner component 32 is located, at least one of which is a groove roll 22. The runner component enhances the operation of the groove roller. In addition, successive guide rollers 16 having a R 14 web 14. When the successive guide rolls 16 are on the same side 35 of the web 14, the runnability component may exert a negative pressure therebetween.

sometimes the runnability component 32 is, are on the same side

C \ J

9

In the system of the invention shown in Figure 4, the runnability component 32 'associated with the groove roll 22 is passive. In turn, the runnability component 32 '' associated with the groove roll 16, which is a smooth roll, is active. Said active runner component 32 '' includes a blow channel 40 to create a suction. The ejector principle is used to create suction with the help of the blowing flow. The passive runnability component associated with the groove roller enables energy savings when no separate suction flow is required. In addition, the passive drive-10 component is overall simpler.

Figures 5a-5c illustrate embodiments of systems 10 according to the invention, which include a runner component 32 between two groove rollers 22 which act as guide rollers. In addition, the groove rollers 22, 15 between which the runnability component 32 is located, are on the same side of the web 14 supported by the wire 12. In this case, the groove roller 22 following the runnability component creates a vacuum under the runner component 32. When the groove rolls 22 on the same side of the wire-supported web 14 are joined by the runnability component 20a112, the groove rolls cooperate with the runnability components. By cooperating the track rollers 22 with the runnability components 32, a considerable vacuum is created over the entire distance between the track rollers 22.

5a to 5c, the runnability components 32 associated with the groove rollers 22 are preferably passive. The edges of the passive runnability components can be mechanically sealed, e.g. why with a flat abrasion-resistant edge or a scratch-resistant labyrinth seal. Sealing can also be done with their x £ 30 combinations so that the friction is best extended to the friction and the other edges are more freely sealed. When the runnability component is inactive, the space limited by the runnability component and the wire, i.e. the box, is preferably small.

c \ j

The design is opening towards the next groove roll, as in Figures 35 5a and 5c. As the design is extended to the next groove roll, the reach of the roll suction effect area is improved and the running wire 10 can partially underpress the runnability component of its runner component and the opening opening formed by the wire.

5a to 5c, the sealing of the runner component 32, which is passive, and of the subsequent groove roller 36 of the next groove roll 22 also affects the runner component 32, i.e. the vacuum formed in the box. In its simplest form, the seal is directly against the groove roll when the angle of collision between the seal and the groove roll 10 does not form a closing friction and otherwise, if desired, reduce the vacuum in the runnability component. If a more efficient sealing is desired, or when a sealing gap is formed between the runner component and the groove roll, the vacuum of the runner component and the groove roll can be enhanced by extending the seal against the roll rotation direction, the more the seal is restricted.

In the systems 10 according to the invention shown in Figures 5a to 5c, the runnability components 32 between the groove rollers 22 are different. When sealing the opening rod 34 to the runner component 32, the most important thing is to prevent air from flowing from the groove roll and with the wire between the runner component and the wire. For this reason, in the opening, the seal is extended as far as possible into the friction. However, at higher speeds and at reduced pressure, the torsion of the wire towards the runnability component can be prevented and c ...

, thus preventing cushion and wire wear by moving c \ i? seal slightly farther open, co

X

In the systems 10 according to the invention shown in Figures 5a-5c, the control parameters o associated with runnability components 32.

ιλ are the aperture of the passive runner component and the surface of the groove roll and the opening of the groove of that groove roll.

35 At the length of the sealant on the surface of the roll in its direction of rotation o, the length of the next sealant and the subsequent runnability c11 are affected by the extent of the vacuum produced. The opening of the gate, in turn, affects the production of vacuum.

In the systems 10 of the invention shown in Figures 5a to 5c, at least one groove roll 22 is idle. The groove roller may be idle as the groove roller can be implemented with a very lightly rotating structure. The lightly rotating groove roller does not need to be used, but receives the momentum required for rotation from the wire. Preferably, all of the groove rolls in the wire cycle are in service-10 millimeters.

In the system 10 according to the invention shown in Fig. 5a, the diameter d of the groove roll 22 is less than 1000 mm. As such, the diameter of the groove roll depends on the machine speed and width. The groove rolls 15 are bearing at their ends. In the prior art, suction rollers are used to create vacuum in place of groove rollers of this size. The air flow required to create the suction roller suction is passed through the suction roller bearing, whereby the bearings are dimensioned according to the airflow. When the diameter of the groove roll is less than 1000 mm, the bearings at the ends of the groove 20 have an inner diameter of less than 300 mm, preferably less than 150 mm. Using a groove roller instead of this size suction roller allows significant cost savings, as the bearings can be dimensioned for stress without having to pass suction flow through them.

25? Fig. 6 shows a system 10 according to the invention with a vertical air blowing unit 38. With a vertical overhead c \ j? The spinning unit 38 has a hood 39. The use of the groove roller 22 with the vertical air blowing unit 38 allows for a significantly more energy efficient vertical air blowing unit. In addition, the said blowing unit can be implemented much simpler than before, since the vacuum does not have to be created by separate vacuum generating means but the cavity roller creates the necessary vacuum.

35 12

In the system of the invention shown in Figure 6, the web 14 supported by the wire 12 covers the groove rolls 22 by more than 2 °, preferably by more than 6 °. Here, the groove rolls 22 receive the rotational momentum from the wire 12, and the groove rollers 22 5 which act as guide rolls can be made idle. When implemented, the groove rolls on the vertical blowing unit are rendered substantially simpler as a whole from the vertical blowing unit. Preferably, the runnability components 32 on the vertical overhead section 38 are passive, whereby no external suction / blowing flow is required.

A key advantage of the track rollers is that the vertical blowing unit can be implemented in a simpler and more compact manner. In particular, the lack of import of external vacuum and the inactivity of the groove rollers enable a vertical overflow unit that can be fitted even in a confined space. As the vertical blowing unit becomes more compact, it can be placed on a more free-standing 20-minute drying section. The groove rollers and further runnability components can even be positioned between the machine beams without making holes in the engine beams for suction or operating joints. The groove rolls can thus be positioned in a completely new type.

Figure 7 shows a system 10 according to the invention, wherein> the runnability component 32 includes

CVJ

^ at least one active zone in the direction of play. Active zone? may be the entire width of the forming machine or cover only a co portion of the transverse direction of the forming machine. The runnability component x 30 includes a blowing channel 40 through which a runner flow is applied to the runnability component to create a vacuum under the ejection principle. The suction flow could also be brought directly to the runnability component to create a vacuum. The blowing flow directed to the runnability component is strong and creates a significant negative pressure, so the runnability component is then an active runner component. Preferably, the active zones 13 are on the sides of the forming machine, whereby they can be applied at the edges to prevent vacuuming. The edges of the runnability component may also have an active zone of full size.

5

The blowing channel 40 of the runner component 32 shown in FIG. The purpose of the ejector flows 41 is to create a vacuum in the runnability component 32.

Through the blow passage 40 of the runner component 32 shown in Figure 7, the runner component also provides the blowing flow required by the blower 45. Blowing 45 is used to create a vacuum because it enhances the boundary layer flow. However, blowing based on the enhancement of the boundary layer flow does not make the runnability component active, since this blowing flow is very small. The enhancement of the boundary layer flow mainly works like a condensation with a low air flow. A boundary flow boost blowing flow makes the runnability component semi-passive.

The runnability component 32 shown in Figure 7 includes air sealing means 42 for closing the ridge component 32 of the runner component 32.

CM

S5 side. Through the blast passage 40c0 of the runnability component 32, the blowing flow required by the sealing blower x £ 30 is also supplied to the runnability component. Said air sealing means 42 seal the edge of the runnability component with a seal 46 on the sealing drop LO, so that the operation of the runnability component is not affected by harmful air flows. Tiivistyspuhal-

CM

lus 46, which is opposed to the boundary layer flow, does not make the runnability component 35 active. However, the runnability component 32 shown in Fig. 7 is active because of the negative pressure created by the ejector flows 41 in that runner component 32.

Figure 8 shows a system 10 according to the invention, wherein the runnability component 32 comprises at least one semi-passive zone in the transverse direction of the forming machine. The semi-passive zone may be the entire width of the forming machine or cover only part of the width direction of the forming machine. The blowing 45 from the blower holding means 43 is parallel to the boundary layer flow of the roll surface 10, but is essentially sealing in function. In addition, the blowing flow through the blowing channel 40 is used to create the sealing flows 46. The runner component 32 is thus semi-passive through the enhancement of the boundary layer flow 15.

Figure 9 shows a system 10 according to the invention, wherein the runnability component 32 comprises at least one passive zone in the transverse direction of the forming machine. The passive zone 20 may extend across the entire forming machine or cover only part of the transverse direction of the forming machine. When the passive zone is wide throughout the forming machine, the blowing stream introduced through the blast passage 40 into the runnability component 32 is used in its entirety to form seal blows 46. There is a mechanical sealing means 44 on the closing rod side. Such a passive runnability component is very advantageous with the groove roll because it utilizes the potential of the groove roll. listed vacuum performance. Thus, the passive zone co in the runnability component means the zone in which the vacuum-x £ 30 ta is not enhanced by external airflows but the vacuum is based on the interaction between the groove roll and the runner component, o LT) to bring any airflow. In this case, the runnability component can be implemented in a very simple construction. Such an embodiment is to enable the manufacture of passive runnability components at low cost. In addition, these passive runnability components are inexpensive in use.

5

Figure 10 shows a groove roll 22 for use in the system of the invention. This groove roll 22 includes a plurality of zones 50 in the transverse direction of the forming machine. Said zones 50 are supported by bearings 52 in the transverse direction of the forming machine 51 from the center to the frame structure 51. The bearings are preferably implemented as air or magnetic bearings, so that contamination can be avoided. The bearings can also be implemented with conventional greased bearings which are well sealed. This groove roll 15, which consists of separate zones, can be manufactured simply when the groove roll zones are idle. When the wire supported by the web overlaps the groove roll by more than 2 °, the groove roll receives the energy it needs to rotate from the wire. A groove roll consisting of a plurality of transverse zones or strips of a forming machine makes it possible to assemble the groove rolls 20 in short components, thereby simplifying the manufacture. When the groove roller has short zones or part rolls, each part roll needs less support than its own mass. In turn, lower self-supporting weight allows for more lightweight component rolls. 25 At the same time, the groove rolls as a whole can be made more lightweight than before.

CVJ

C \ J

? In one embodiment, in the same position as used

C/O

a multi-zone groove roller, one wants a groove roll x £ 30 of energy to rotate the wire. In this case, the outermost zones of the groove roll may be useful. o

LO

r--.

Fig. 11 is a top plan view of the system according to the invention. At the top, a web 14 is shown, under which 35 wires 12 are shown. Wire 12 and web 14 are shown cut off at groove rolls 22, whereby the groove rolls 22 are shown. The groove roll 22 16 includes a plurality of separate zones 50 in the transverse direction of the forming machine. The zones 50 are not in close proximity to each other, i.e. there may be significant gaps 54, i.e. gaps, between the zones.

5

In the system according to the invention shown in Fig. 11, there may be flow prevention components 56 between the zones 50 forming the groove roll 22. This provides a uniform runnability component which allows the vacuum 10 to be extended almost correspondingly to the runner component associated with the full width groove roll. Flow prevention components are, for example, mechanical sealing means for preventing air flow with the wire. In addition, the track rollers typically include runnability components, although not shown in the figure.

In the system of the invention shown in Figure 11, there are two differently implemented zone track rollers 60, 62. In zone track roller 60, zones 50 are mounted on shaft 58. In turn, zone 20 roller 62 has zones mounted on frame structures 51 (Figure 10).

δ

CVJ

CVJ

cp co

X

X

Q.

1?

C/O

o m o o

CVJ

Claims (8)

A system on the drying section of a forming machine for guiding the wire (12) and further the web (14) by guide rolls (16), the web (14) supported by the wire (12) covering at least one of the guide rolls (16) and at least one guide roll (16) covered by the web (14) below 90 ° is a groove roll (22) covered by a web (14) 2 ° to 90 ° and wherein the groove roll (22) has adjacent grooves (24) in the transverse direction of the forming machine , and adjacent grooves (24) in the groove roll (22) are separate pressure zones from the area covered by the web (14), at least one groove roll (22) is idle, characterized in that the system (10) includes a separate runner component (32) (16) between at least one of the groove rolls (22) and 15 which guide rollers (16) are on the same side of the web (14) supported by the wire (12) and the groove roller (22) is partially open and adapted to form a vacuum. System according to claim 1, characterized in that the two successive guide rollers (16) are groove rollers (22). System according to Claim 1 or 2, characterized in that the system (10) comprises a runner component (32) between two guide rollers (16), both of which are groove rolls (22) and on the side of the web (14) supported by the line (12). LO cp CNJ A system according to claim 1 or 3, characterized in that the runnability component (32) associated with the groove roll (22) is passive, System according to one of Claims 1 to 4, characterized in that the depth 35 (a) of the grooves (24) in the groove roll (22) is at least 10 mm, preferably at least 20 mm. System according to one of Claims 1 to 5, characterized in that the diameter (d) of the groove roll (22) is less than 1000 mm. A system according to any one of claims 1 to 6, wherein the ends of the groove roll (22) include bearings, characterized in that the bearings of the ends of the groove roll (22) have an inner diameter of less than 300 mm, preferably less than 150 mm. ίο System according to one of Claims 1 to 7, characterized in that the web (14) covers the groove roll (22) below 30 °. co δ {M m o i {M O X cc CL h- CO o m h- o o CM