EP1422174B1 - Method and apparatus for the preparation of a paper reel for flying reel change - Google Patents

Abstract

The outermost layer of a support surface of a paper reel (8) is lifted and the paper reel is rolled to loosen the outermost layer up to a termination portion where the outermost layer is cut. Adhesive tape is affixed to the next layer and the paper reel is rolled until the support surface is returned to the starting position. An Independent claim is also included for a paper reel preparation apparatus.

Description

Technical area

The invention relates to a method for preparing a paper roll for flying reel change according to the preamble of claim 1 and an apparatus for performing the method according to the preamble of claim 7. Such methods and devices are used in roll cellars of printing companies for use.

State of the art

It is known to prepare paper rolls for flying reel change by using an adhesive tape which connects the web end edge with the next inner layer and at the same time on the outer surface of the paper roll has an adhesive surface for bonding to the residual role, s. z. B. DE-A-43 39 309. Recently, such adhesive tapes are available (see, for example, so-called. Flying Splice System 551 of ASS label GmbH, Flying Splice Print Line tesa 51100 Tesa AG or DE-A-196 32 689) , which consist of an outer band and an inner band, which are arranged one above the other and separably connected. The inner band is provided with an inner adhesive surface for connection to the next inner layer, while the outer band has an outer adhesive surface for connection to the tail and the residual role.

For the attachment of conventional tapes, methods have been proposed in which a web section of the Paper roll unwound, the tape attached to the web end edge on the outside of the paper web and then rewound while the Bahnendrand by means of there simultaneously mounted protruding adhesive labels with the next lower layer is connected and appropriate devices (see DE-C-195 40 689). However, they can not be taken over without further ado, since there the adhesive tape is applied to the outside of the paper web, which is not possible with adhesive tapes of the new type. This also applies to otherwise similar cases where the connection of the tail edge with the next lower layer is made by means of a separate so-called butterfly, while applied to the outside of the paper web to produce the connection with the paper web of the remaining role just before the Bahnendrand a double-sided adhesive tape is (DE-C-39 18 552).

From DE-38 34 334 a generic method and a corresponding device are known which are suitable for the use of adhesive tapes of the new type described above. After unwinding a web section such that a part thereof hangs over an inclined contact surface mounted below the reel, a web end edge is produced by cutting an end section along a cutting line extending over the contact surface and then the adhesive tape is pressed there against the inside of the outermost layer and the web wound up again. In this approach, the position of the unwound web portion is not constantly under control, so that adjust slightly lateral shifts or waves that interfere with the process and can cause Bahnwickler. In addition, the roll of paper must be rotated, ie be rotatably mounted, which considerably increases the expenditure on equipment.

A basically similar method and apparatus, which can be found in EP-A-1 041 025, ensure control of the unwound web section by first holding the inside of it at an adhesive surface with suction openings and cutting off the end section to make the web end edge and then the outside is held by a second adhesive surface, while the adhesive tape is pressed along the Bahnendrandes to the inside. However, this requires a considerable design effort, especially since the role must be rotatably mounted here.

Presentation of the invention

The invention is based on the object to provide a method in which the position of the paper web is always under control. In addition, it should be feasible with little effort. This object is solved by the features in the characterizing part of claim 1. The invention provides a method in which the position of the unwound web section, which is then placed back on the reel, never hangs freely, but always stretched. As a result, the position of the re-launched path section is precisely defined and error-free. In addition, a rotation of the roller is not required. It therefore does not need to be clamped.

Another object of the invention is to provide a suitable apparatus for carrying out the inventive method. This object is solved by the features in the characterizing part of claim 7. The inventive device allows a reliable and clean execution of the method. she is In addition, relatively easy and with moderate effort to produce.

Brief description of the drawings

Fig. 1

schematisch eine perspektivische Ansicht einer erfindungsgemässen Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens mit einer Papierrolle,

Fig. 2

schematisch eine Vorderansicht der Vorrichtung gemäss Fig. 1,

Fig. 3

schematisch eine Seitenansicht der Vorrichtung gemäss Fig. 1,

Fig. 4

schematisch eine Seitenansicht entsprechend Fig. 3, wobei bestimmte Teile weggelassen wurden,

Fig. 5

eine Vorderansicht einer Komponente der Vorrichtung gemäss Fig. 1,

Fig. 6

einen Querschnitt durch eine andere Komponente der Vorrichtung gemäss Fig. 1,

Fig. 7

in perspektivischer Darstellung einen Teil der Komponente von Fig. 5 und

Fig. 8a-1

schematisch den Ablauf des erfindungsgemässen Verfahrens.

In the following the invention will be explained in more detail with reference to figures, which represent only one embodiment. Show it

Fig. 1

1 is a perspective view of a device according to the invention for carrying out the method according to the invention with a paper roll;

Fig. 2

1 is a schematic front view of the device according to FIG. 1,

Fig. 3

1 is a schematic side view of the device according to FIG. 1,

Fig. 4

2 is a schematic side view corresponding to FIG. 3, with certain parts omitted;

Fig. 5

a front view of a component of the device according to FIG. 1,

Fig. 6

a cross section through another component of the device according to FIG. 1,

Fig. 7

in a perspective view a part of the component of Fig. 5 and

Fig. 8a-1

schematically the course of the inventive method.

Ways to carry out the invention

The device according to the invention has (Fig. 1) a stand 1 with two vertical columns 2a, b, which are connected by a cross member 3. On the columns 2a, b, a frame-like boom 4 with two side bars 5a, b and two crossbars 6, 7 is mounted vertically displaceable, which projects forward over a paper roll 8, whose axis is parallel to the traverse 3 and which is located on a trolley 9 , The trolley 9 is slidable or moved along a sunken rail 10 passing on the device.

On the boom 4, a carriage 11 with a horizontal frame with two trusses 12, 13 and downwardly projecting side parts 14a, b along, so mounted transversely to the cross member 3 slidably. Guides 15, 16 (see also Fig. 4, where the side parts 14a, b are partly omitted) are provided on the inner sides of the side parts 14a, b, on which a carriage 17 is mounted so as to be vertically displaceable. It has lateral frame parts 18a, b, which are connected by guide bars 19, 20 (FIG. 5) arranged parallel to one another and perpendicular to the crossbars 12, 13. Before the guide rods 19, 20 are mounted in the frame parts 18a, b bearings for rotatably supporting the ends of an axis parallel to the guide rods 21 which carries a coaxial roller 22 (Fig. 1-4, not shown in Fig. 5).

A transverse slide 23 is displaceably mounted on the guide rods 19, 20 in such a way that it can be moved between the frame parts 18a, b. On a support plate 24 thereof, a cutting device 25 and an adhesive device 26 are mounted. Above the cross slide 23rd on the carriage 17 a take-off device 27 (FIG. 2) tiltably anchored by a pneumatic cylinder with two parallel to the truss shafts 28a, b, over which distributed over its length several parallel elastic belt 29 run and one of which is driven. To reduce the effective weight of the carriage 17, the same may be supported by gas springs on the carriage 11.

The vertical displacement of the boom 4 takes place (FIG. 2) via a shaft 3 mounted in the traverse 3, which can be driven by a motor 31 and via angle gear 32a, b on the columns 2a, b mounted lifting spindles 33a, b drives, with corresponding threaded bushes 34a, b engage the boom 4. The movement of the carriage 11 is generated (see Fig. 4) by a motor 35 mounted thereon, which drives pinions 36 which engage with racks 37 mounted on the side beams 5a and 5b of the boom 4.

The movement of the cross slide 23 along the guide rods 19, 20 is generated by another motor 38 (Fig. 3) via a pinion 39 (Fig. 5) over which a closed toothed belt 40 runs, the lower run with the cross slide 23 is connected. The roller 22 is (Fig. 4) via a toothed belt 41 driven by a fixed to the carriage 17 motor 42. The positions of the boom 4, the carriage 11, the cross slide 23 and the angle of the roller 22 are each monitored by appropriate donors and passed to a control unit in a mounted on the frame 1 switch box 43 (only shown in Fig. 1).

The roller 22 has (FIG. 6) a jacket 44, which has the form of a cylinder jacket sector coaxial with the axis 21, which extends over its entire length and about two thirds of the full angle. Its outer side forms a contact surface in which a first cutting bar 45, a first suction bar 46, a second cutting bar 47 and a second suction bar 48 are sunk. The said strips each extend along a surface line over the entire length of the roller 22 and follow each other azimuthally. The cutting strips 45, 47 are each formed as a profile 49, which has a flat groove on the outside, in which a cutting strip 50, preferably made of a plastic with low adhesion and friction or metal, possibly coated with a plastic of the type described , sunk. The suction strips 46, 48 are each formed as a profile 51 with an outwardly facing groove, which is divided into a plurality of chambers and covered by a strip 52 of perforated metal sheet, the outside of which forms a suction zone. From the inside, at least one suction line 53 opens into the groove, through which air can be drawn off by a pump, not shown, and a negative pressure can be generated.

On the front of the roller 22, azimuthally spaced by approximately 75 ° from the first cutting bar 45, along a surface line a number of suction cups 54 is arranged, which are also connected via suction lines 55 also for generating a negative pressure to the pump. Each of the suction cups 54 has a valve operable by a plunger 56 which is open only when it is slightly pushed back by contact with an object. Shortly before the row of suction cups 54 is a series of sunk, but arranged over the contact surface vorschiebbar stored in pneumatic cylinders 57 needles 58. They are slightly inclined towards the row of suction cups 54.

The cross slide 23 has (Fig. 7) on a base plate 59 which is slidably mounted directly on the guide rods 19, 20 and on which the support plate 24 is suspended vertically displaceable limited. Its vertical position is adjustable by a pneumatic cylinder.

The cutting device 25 projects from the base plate 59 of the cross slide 23 through a slot in the carrier plate 24 against the roller 22. It comprises a pneumatic cylinder 60 which carries a housing 61 in which a cutting disc 62 is rotatably mounted. The housing 61 can be advanced by means of the pneumatic cylinder 60 against the roller 22 until the cutting disc 62, which is exactly at the height of the roll axis, depending on the angular position of the roller 22, the first cutting bar 45 or the second cutting bar 47 just touched.

The adhesive device 26 consists of several parts which are fastened or mounted on the side of the carrier plate 24 of the cross slide 23 facing the roller 22. A rotatably mounted, slightly braked supply roll 63 carries an adhesive tape 64, which is covered by a shroud 65, which is completely or partially withdrawn at a deflection roller 66 and wound on a driven by a take-up reel 67, which is monitored by an optical tape sensor 68. The tape supply on the supply roll 63 is monitored by a likewise optical supply sensor 69. The adhesive tape 64 continues to pass through a guide 70, where it is clamped between a drive roller 71 and an idler counter-roller 72 of a feed device. The drive roller 71 is mounted in a holder 73 which is pressed by a pneumatic cylinder 74 against the counter-roller 72. To manually feed a new one Sticky tape, the holder 73 is withdrawn by the pneumatic cylinder 74.

The adhesive tape 64 continues to pass through a pair of scissors 75 and under a first pressure roller 76 and a subsequent second pressure roller 77, which press it against the roller 8. A feed sensor 78 monitors whether the adhesive tape 64 is advanced at least to just before the first pressure roller 76. The pressure rollers 76, 77 are suspended at the same height and in the same way on the support plate 24, in each case on a bearing at the lower end of a vertically displaceable plunger 79, which is pressed by a compression spring (not shown) down against the roller 8 ,

On the left side of the support plate 24, an optical length sensor 80 (Fig. 5) is arranged, which responds as soon as it is above the roller 8. Likewise, a likewise optical diameter sensor 81 (FIG. 1), which detects the edge of the end face of the paper roll 8 when the boom 4 is lowered, is laterally mounted on the side part 14a of the carriage 11. The signals of all sensors are supplied to the control unit in the control box 43.

The preparation of a roll of paper is as follows:

The paper roll 8 is moved on the trolley 9 under the boom 4. The end of the paper web lies on the side facing the stand 1. The paper web goes so far beyond the uppermost surface line of the paper roll 8 that the outermost layer does not slip back under its own weight. The carriage 11 is moved to an initial position, in which the axis 21 of the roller 22 just above the center of the rail 10 and thus the uppermost Mantellinie the paper roll 8 is located. Then, the roller 22 is rotated by the motor 42 in a Nullage, in which a coinciding with the center line of the second cutting bar 47 cutting line at the bottom, ie the uppermost surface line of the paper roll 8 is exactly opposite (Fig. 8a).

Now, the boom 4 is lowered by the motor 31 until either the diameter sensor 80 responds or the boom 4 has reached a certain height, without the same would have addressed. The latter case in which the paper roll 8 has a diameter smaller than a certain limit (small roll) will be discussed below. In the former case, in which the diameter of the paper roll 8 is greater than the limit (large roll), the boom 4 is further lowered by a fixed distance after the diameter sensor 80 has responded at a reduced speed, and the roll 22 is placed on the paper roll 8 in that the center line of the second cutting bar 47 touches the uppermost generating line. Since the boom 4 is further lowered with the carriage 11 after placing the roller 22, the carriage 17 is pushed from its lower limit position upwards, so that he gets in the carriage 11 margin down. Finally, the roller 22 is uncoupled from the motor 42 (Figure 8b).

Now the carriage 11 continues to move forward, ie it moves in a horizontal displacement direction following the stand 1. Since the roller 22 is freely rotatable, the lateral surface 44 thereof is rolled out of its starting position shown in Fig. 8b against the unwinding direction of the paper roll 8 on the same until the suction cups 54 come into contact with the paper roll 8. The slide 17 shifts slightly downward. The carriage 11 is stopped when the roller 22 has reached a previously calculated from their known diameter and the determined diameter of the paper roll 8 by the control unit angular position. Now, vacuum is applied to the suction cups 54, as far as their valves are opened by contact of the plunger 56 with the paper roll 8, and the outermost layer of the paper web is sucked in (FIG. 8c).

In the following, the carriage 11 is moved beyond its initial position from the stand 1 away, wherein the lateral surface 44 is now rolled in the unwinding of the paper web on the paper roll 8. After a short travel, the needles 58 are extended, which pierce the outermost layer of the paper web and thereby reliably hold the same on the lateral surface 44 (FIG. 8d). The portion of the paper web projecting beyond the row of suction cups 54 is drawn by tilting the withdrawal device 27 against the roller 22 and moving the belts 29 in the direction of the arrow between them and the roller 22 (FIG. 8e).

During the further rolling movement, the first suction strip 46 and the second suction strip 48 are also switched on when the roller 22 reaches those predicted angular positions in which they come into contact with the outermost layer of the paper roll 8. The carriage is stopped when the second cutting bar 47 faces the cross slide 23, ie after rotation of the roller by exactly 90 ° relative to its initial position. Then, to cut off an end portion and make a web end edge, the paper web is cut by the cutter 25. For this purpose, the housing 61 is advanced by means of the pneumatic cylinder 60 until the edge of the cutting disc 62 just touches the second cutting bar 47 at the cutting line. Of the In this case, the cross slide 23 is in a basic position on the right side of the carriage 11. Now, the cross slide 23 is moved to the left side and made a tail edge by cutting off an end portion 82 of the paper web (Fig. 8f).

In the same movement or after return of the cross slide 23 in the home position, the adhesive tape 26 is applied in the region of the uppermost surface line on the next inner layer of the paper web by means of the adhesive device 26, while an adjacent to the tail edge portion of the outermost layer through the second squeegee 48 at the lateral surface 44 is held in place. For this purpose (see Fig. 7), the adhesive tape 64 is advanced by means of the feed device until the feed sensor 78 detects that it extends to the first pressure roller 76 and the cross slide 23 with raised support plate 24 from the home position to the left, the length sensor 80 the Roll start detected until the first pressure roller 76 is above a point which has a certain distance from the start of the roll - usually of a few millimeters - has.

Then, the support plate 24 is lowered, so that the pressure roller 76 touches down on the paper roll 8 and is pressed against the force of the compression spring upwards. The movement is terminated when the force has reached a certain value, which can be determined for example by monitoring the deflection of the plunger of the pressure roller 76 by another optical sensor. The adhesive tape 64 is pressed against the paper roll 8 by the pressure roller 76 (FIG. 8g), so that the underside of the inner tape adheres to it. Shortly after the length sensor 80 has detected the end of the paper roll 8, the Cross slide 23 stopped and cut the adhesive tape 64 by means of scissors 75. Then, the cross slide 23 takes its movement again until the rest of the cut-off adhesive tape 64 is pressed by the pressure rollers 76, 77 to the paper roll 8. Finally, the support plate 24 is raised again and the cross slide 23 is moved back to the starting position.

Now, the cut end portion 82 of the paper web is withdrawn by appropriate movement of the belt 29 via the roller 22 (Fig. 8h) and removed via a subsequent, not shown slide. Finally, the carriage 11 is advanced back to its initial position while the lateral surface 44 on the paper roll 8 exactly in its initial position in which the cutting line coincides with the uppermost surface line of the paper roll 8, rolled back, the second suction bar 48 is turned off as soon as they begins to detach from the paper web.

As a result, a strip of the outermost layer of the paper roll 8 adjoining the web end edge 83 is pressed against an adhesive strip of the upper side of the outer band of the adhesive tape 64 behind the upper surface line and thus bonded to the next inner layer, while a marginal strip lying in front of the uppermost surface line remains free and is later available for bonding to the residual roll (Figure 8i). During the application of the adhesive tape 64, only one of the adhesive strips of the outer band covering partial strip of the shroud 65 can be deducted, so that the edge strip is covered by the complementary partial strip or it can be deducted the whole shroud 65 so that the edge strip is exposed and the splice ' sharp 'is. In the former case, the Remaining partial strips of the shroud are manually deducted before using the paper roll 8 in the roll stand.

Finally, the boom 4 is turned on and the roller 22 is lifted off the paper roll 8 and the adhesive tape 64. Thus, the preparation of the paper roll 8 is completed (Fig. 8j).

In the event that the roll of paper in the roll stand is to be driven with straps, interruptions in the applied adhesive tape 64 can be provided by the same cut off at predetermined locations of the travel of the cross slide 23 and the support plate 24 is raised with the adhesive device 26 after pressing the cut remainder and so over the portion of the generatrix, which should remain free, is moved, whereupon the tape is advanced by the feed device to below the first pressure roller 76 and the support plate 24 is lowered again.

If the paper roll 8 is a small roll, ie the boom 4 reaches a certain height during lowering without the diameter sensor 80 having responded, then the roll 22 is rotated to a new starting position, in which the first cutting edge 45 is downwards points and then further only slowly and after addressing the diameter sensor 81 slowly lowered until the first cutting bar 45 touches the uppermost surface line of the paper roll 8. The further process proceeds in the same way as described for large rollers, only takes the first cutting bar 45, the position of the second cutting bar 47 a.

LIST OF REFERENCE NUMBERS

1

stand

2a, b

columns

3

traverse

4

boom

5a, b

sidebar

6, 7

crossbeam

8th

paper roll

9

Dolly

10

rail

11

dare

12, 13

trusses

14a, b

side panels

15, 16

guides

17

carriage

18a, b

frame parts

19, 20

guide rods

21

axis

22

roller

23

cross slide

24

support plate

25

cutter

26

gluer

27, 28

off device

29

belt

30

wave

31

engine

32a, b

angle gear

33a, b

jackscrews

34a, b

threaded bushings

35

engine

36

pinion

37

rack

38

engine

39

pinion

40

toothed belt

41

toothed belt

42

engine

43

switchbox

44

lateral surface

45

first cutting bar

46

first squeegee

47

second cutting bar

48

second squeegee

49

profile

50

cutting strips

51

profile

52

strip

53

suction

54

suction cup

55

suction

56

tappet

57

pneumatic cylinder

58

needle

59

baseplate

60

pneumatic cylinder

61

casing

62

cutting disc

63

supply roll

64

duct tape

65

shroud

66

idler pulley

67

up roll

68

band sensor

69

stock sensor

70

guide

71

capstan

72

counter-roller

73

bracket

74

pneumatic cylinder

75

scissors

76

first pressure roller

77

second pressure roller

78

advance sensor

79

tappet

80

length sensor

81

Diameter sensor

82

end

83

railway Drand

Claims (20)

1. Method for the preparation of a paper reel (8) having a wound paper web for flying reel change by applying an adhesive tape (64) along an edge (83) of the web end, which has at least one outer tape having an outer adhesive surface for producing the joint between the web end and a paper web of a residual roll, and an inner tape which can be separated therefrom and has an inner adhesive surface for holding the web end on the next inner layer, by lifting of the outermost layer from the next inner layer, producing the edge (83) of the web end by cutting off an end section (82) from the outermost layer, applying the adhesive tape (64) and replacing the outermost layer on the next inner layer, a part of the outermost layer which is adjacent to the edge (83) of the web end being adhesively bonded to an adhesive strip of the outer adhesive surface while an edge strip adjacent thereto remains free and the inner adhesive surface adhesively bonds to the next inner layer, characterized in that, while the paper reel (8) remains otherwise unmoved, the lifting of the outermost layer is effected by placing a support surface, whose cross-section perpendicular to the axial direction of the paper reel (8) is substantially constant over its width, against the paper reel (8) and establishing a starting position in which a cutting line of the support surface, which cutting line is parallel to the axis of the paper reel (8), is in contact with a generating line of the paper reel (8), and the support surface is rolled, while the outermost layer is held resting on it, in the unwinding direction thereof on the paper reel (8), cutting off the end section (82) along the cutting line and applying the adhesive tape (64) to the next inner layer in such a way that the boundary between the adhesive strip and the edge strip coincides with the generating line, whereupon the support surface is rolled back to the starting position for replacement of the outermost layer.
2. Method according to Claim 1, characterized in that the support surface is placed with the cutting line on the paper reel (8).
3. Method according to Claim 1 or 2, characterized in that the axis of the paper reel (8) is kept horizontal and the support surface is placed on the uppermost generating line.
4. Method according to any of Claims 1 to 3, characterized in that, before it is rolled in the unwinding direction, the support surface is first rolled a distance in the opposite direction on the paper reel (8) and the outermost layer is held on the support surface from the beginning of rolling in the unwinding direction.
5. Method according to any of Claims 1 to 4, characterized in that the holding of the outermost layer on the support surface is effected by reduced pressure.
6. Method according to any of Claims 1 to 5, characterized in that, after the end section (82) has been cut off, said end section is removed.
7. Apparatus for carrying out the method according to any of Claims 1 to 6, comprising a support surface having at least one cutting line and a cutting device (25) movable along said cutting line over the support surface, where the support surface is formed by a section of a lateral surface (44) of a roll (22) while the cutting device (25) can be moved over the lateral surface (44) along a cutting line which follows a generating line of the lateral surface (44), and the roll (22) is mounted, so as to be rotatable about an axle (21) parallel to the axial direction of the paper reel (8), in a holder which is displaceable in a displacement direction transverse to said axial direction, so that the axle (21) is freely displaceable to a limited extent transverse to the axial direction and to the displacement direction.
8. Apparatus according to Claim 7, characterized in that the holder is formed by a carriage (11) displaceable in the displacement direction, and the axle (21) is mounted so as to be rotatable and nondisplaceable in a slide (17) which is mounted so as to be displaceable transversely to the axle (21) and transversely to the displacement direction of the carriage (11) in the latter.
9. Apparatus according to Claim 8, characterized in that the carriage (11) is mounted so as to be displaceable in a frame which is displaceable transversely to the axle (21) and to the displacement direction.
10. Apparatus according to Claim 8 or 9, characterized in that the cutting device (25) can be moved in the slide (17) parallel to the axle (21).
11. Apparatus according to Claim 10, characterized in that the cutting device (25) can be fed towards the roll (22).
12. Apparatus according to Claim 10 or 11, characterized in that the cutting device (25) is arranged, so as to be displaceable towards the axle (21) and withdrawable therefrom but nondisplaceable transverse thereto, on a transverse slide (23) which can be moved parallel to the axle (21) in the slide (17) and which also carries an adhesive device (26).
13. Apparatus according to Claim 12, characterized in that the adhesive device (26) is arranged on the transverse slide (23) so as to be displaceable transversely to the axle (21) and to the displacement direction.
14. Apparatus according to any of Claims 7 to 13, characterized in that the axial direction of the paper reel (8) is horizontal and the holder is displaceable horizontally above said reel, in such a way that the end positions of the axle (21) are on different sides of the uppermost generating line of the paper reel (8).
15. Apparatus according to Claim 14, characterized in that the axle (21) is vertically displaceable in the holder.
16. Apparatus according to any of Claims 7 to 15, characterized in that the roll (22) has at least one cutting bar (45, 47) following a generating line, sunk into the support surface and preferably having a plastics surface, over which the cutting line runs.
17. Apparatus according to Claim 16, characterized in that it has at least two such cutting bars (45, 47).
18. Apparatus according to any of Claims 7 to 17, characterized in that the roll (22) has at least one suction zone substantially extending over the width of the support surface and provided with suction orifices.
19. Apparatus according to any of Claims 7 to 18, characterized in that the lateral surface (44) substantially corresponds to a lateral surface sector of a cylinder whose axis coincides with the axis (21) of the roll (22).
20. Apparatus according to any of Claims 7 to 19, characterized in that it has a take-off device (27) for removing the end section, which device comprises a plurality of revolving belts (29) which are distributed over the length of the roll (22) and can be pressed against the lateral surface (44).

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