WO1997015517A1

WO1997015517A1 - Device and method for combining and processing several continuous strips of paper

Info

Publication number: WO1997015517A1
Application number: PCT/EP1996/004535
Authority: WO
Inventors: Joseph Schweiger
Original assignee: Branstal Printing Participation Establishment
Priority date: 1995-10-20
Filing date: 1996-10-18
Publication date: 1997-05-01
Also published as: AU7295896A; CA2235463A1; EP0857155A1

Abstract

The device proposed for combining and processing at least two continuous strips of paper or film includes unwinding units (1a, 1b, 1c) in each of which a strip of paper (3a, 3b, 3c) is unwound from a roll (2a, 2b, 2c) by take-off rollers (7a, 8a; 7b, 8b; 7c, 8c) and markings made at regular intervals, each strip being optionally passed over a deflection roller (13a, 13b, 13c). The at least two strips (3a, 3b, 3c) are then combined and fed to a processing line (11) where they pass through optionally independent processing units and are fed to a further-processing unit (15). The invention calls for means for ensuring the congruency of the longitudinal and/or transverse registers on the at least two strips (3a, 3b, 3c), these means including means for establishing an essentially equal tension in each of the at least two strips across the width of the strip, feelers (18, 17a, 17b, 17c) designed to detect the time sequence of the markings (25) on each strip (3a, 3b, 3c) and a control unit (19) designed to control, for each strip, a drive/brake unit and/or to control a motor (28a, 28b, 28c) operating in conjunction with a roller (24a, 24b, 24c) extending across each strip (3a, 3b, 3c).

Description

DEVICE AND METHOD FOR MERGING AND REFINING

SEVERAL PAPER FILMS

The invention relates to a device for merging and refining a plurality of paper webs according to the preamble of claim 1, and to a method for merging and refining a plurality of paper webs.

Refining a paper web is understood in the broadest sense to mean any form of processing, be it printing, coating, numbering, punching, punching, or also applying or covering (sticking) with plastic cards, such as credit cards, with sample packs, with labels , or creating address windows and covering them with transparent foils.

If a single, endless paper web is finished, the synchronization of the processes makes it error-free

Further processing of the same, such as folding or cross cutting, depends only on the correct observance of the web speed. This is done, for example, by providing register perforations on the paper webs, in which barbed strips which are arranged along the processing or finishing line engage and thus ensure synchronous feed of the paper web. However, this type of longitudinal registration has the disadvantage that, on the one hand, this perforation edge generally has to be removed in the further processing unit, and on the other hand, this double-sided perforation edge means loss of material which is of high quality per se.

In the case of a known device, this disadvantage is eliminated by providing the paper web with markings which are registered via a web button. This button is arranged in front of the further processing unit. There- with - by means of a corresponding control system - further processing, such as printing, embossing, punching or cutting of webs that have already been processed, for example pre-printed, is made possible. The drive of the unwinding rollers on the unwinding unit is regulated via the control, whereby the format length can be influenced. As an alternative to this, the register can optionally also be corrected via a synchronous motor influencing the drive of the feed rollers arranged upstream of the further processing unit.

A completely different situation arises, however, if not only one web is to be refined and further processed - a requirement that arises, for example, in newspaper printing, but several webs are to be processed, possibly in different ways - think, for example, of glued-in sample packages or to removable reply cards. So far there have been no satisfactory solutions. It is certainly possible to run all paper webs over barbed tapes, but this would not make it possible to process individual webs independently. The other device shown above can be used for one paper web, but not for several webs that are together, i.e. one above the other, are guided and, if necessary, are processed independently and, if appropriate, are webs of different quality or with different finishing (for example occupancy).

Accordingly, the object of the invention is to provide an apparatus and a method with the aid of which several paper webs are brought together and - if necessary independently of one another - refined, and which can be fed together to a further processing unit in the longitudinal and transverse registers. One way of achieving this object is through the realization of the features of claim 1 and claim 10. Advantageous designs are described in the dependent claims.

“Paper webs” in the sense of the invention are to be understood as all those materials which are in web form, which may be subjected to a finishing process, which in any case are brought together with other webs, and which are subsequently subjected to further processing together with these other webs. Thus, for example, film webs, rather thin cardboard webs and paper webs of different thickness and quality are included.

By "merging" the individual paper webs is to be understood the arrangement of the already unrolled paper webs - possibly at a distance from one another - before they pass through the processing section, where they may be processed independently of one another or not at all, i.e. also cover other routes if necessary. According to the invention, it is possible for one of the webs to pass through the processing line without processing, while another web is being guided over deflection rollers and is subjected to finishing processes. In the same way, however, all the webs in a processing unit can also be processed simultaneously, for example crimped or numbered.

"Markings" are understood to mean all possible arrangements that can be registered or ascertained via "web buttons", such as printed bar codes or wedge shapes, dots or dot arrangements, magnetic strips, chips or also predetermined ones for - possibly invisible and only readable via infrared scanners the respective paper webs to be determined in each case reference points. The "path sensors" will have to be selected accordingly, which are to be understood to mean various types of registration devices, such as electro-optical scanners, infrared, chip or magnetic readers. Every entry is registered under "Register" understood such a path switch, with which information is made available directly or indirectly to the control device.

"Cross-rollers" are generally understood to mean guides which are essentially perpendicular to the direction of web travel of the respective paper web. For example, these can be driven rollers, guide plates or friction-moving rollers; sufficient friction between the paper web and the "cross roller" will be essential so that the desired control effect is possible by lifting or lowering on one side. The relative position with respect to the direction of web travel will generally be vertical, but the inclination of the "cross rollers", as is the case for the turning crosses, enables the control of the cross registration.

The means for congruent longitudinal and / or transverse register control of the at least two paper webs comprise, on the one hand, means for building up a paper tension which is essentially the same for the at least two paper webs across the width of the respective web, whereby on the one hand only the registration of those applied to the paper webs Markings on the web buttons are relevant in their chronological order and this registration can be used in particular to regulate the longitudinal registration of the at least two paper webs. It is only because the merged paper webs are under a certain paper tension that differences in the longitudinal register, which can occur, for example, due to the finishing in the processing line, and which are determined by the registration of the markings by the web buttons, can be eliminated ¬ be compared. For this purpose, a drive or braking device is controlled via a control unit, which is particularly assigned to the respective take-off rolls, since these determine the web speed as driven rolls. On the other hand, the special shape and / or type of A specific signal - for example of a certain duration - is simultaneously available for marking or the type of scanning via the path scanner, which signal can be used to regulate the cross-registration. For this purpose, a motor is controlled via a control unit, which is assigned to a roller, which is provided in particular the last roller before the individual paper webs are brought together, or immediately behind any turning crosses that may be provided. This roller is raised or lowered on one side via this motor. As an alternative or in addition, the transverse registration can also be carried out by pivoting the turning crosses in their entirety, the control again takes place via a motor assigned to the turning crosses.

In order to ensure that the individual webs are processed in a register-accurate manner and that they are processed correctly in the further processing unit across the processing line even when passing through the individual processing units, the means for building up the paper tension are to be arranged at least between the processing line and the further processing unit and, since the webs in the processing unit are generally no longer under tension, as far as possible directly in front of the processing unit.

If the means for building up the paper tension are provided as a pair of tension rollers in the form of rubber rollers, then due to the relatively compliant surface thereof, the pressure acting on the merged paper webs can be distributed more uniformly over the width of the paper web than is the case, for example, with known tension rollers would be an essential requirement, especially for refined railways. If such rubber rollers are provided with a certain profile on their circumference, then finishing products applied to the paper web (s) are taken up when the paper webs pass through the rubber rollers into the appropriate recesses in the profile, the pressure being applied the merged paper tracks remains the same. Depending on the paper quality used, the number of paper webs and, if appropriate, the type of processing of the individual paper webs carried out in the processing section, several can be provided instead of a single pair of pulling rollers in order to ensure sufficient adhesion between the individual paper webs ensure and / or to squeeze out any air bubbles that may exist between the paper webs.

If a web button that registers the markings of the top web is provided in the area of the drawing rollers, in the case of several pairs of drawing rollers in particular in the area of the last pair of drawing rollers in the paper transport direction, this guarantees that the subsequent further processing is carried out with an exact register, in particular when the further processing unit connects as directly as possible to the drawing rollers. The registration of the markings on the paper webs guided under the uppermost web takes place via web buttons which are provided in front of the processing section - this also makes the register necessary for individual processing correct at the same time - in particular immediately before the combination with the respective one upper paper web. For the uppermost path, a path sensor arranged in front of the processing line can also be provided, which means that, in particular in the case of different processing units in the processing line, information is provided on the correct longitudinal and transverse registration of the top line alone, in addition to that via the in Register information values are available in the area of the web rollers and are then used only for the correct registration of the units of the further processing unit and the units of the processing unit.

The invention is described below by way of example with reference to drawings. Show it: Fιg.1 a roll-off unit;

2 shows a side view of the device according to the invention for merging and refining three paper webs with three unwinding units and

3 shows a view of the device from above corresponding to FIG.

In Fig. 1 an unrolling unit 1 is shown, in which a paper web 3 is unrolled from a roll 2. For this purpose, the axis 4 of the roller 2 is mounted on an inclined roller guide 5, the paper web 3 is unwound via a roller 6 lying on the circumference of the roller 2, generally driven and acting as a brake, two take-off rollers 7 and 8 With a differential gear, the paper web 3 is drawn off at a specific speed which can be selected or regulated. The paper web speed is thus determined. The register of the web is determined via a read head 26 and fed to a control unit in a web edge controller 9 as a reference value, which enables a first lateral registration of the paper web.

As can be seen from FIGS. 2 and 3, paper or film webs 3a, 3b and 3c are unwound over a plurality of such unwinding units 1a, 1b and 1c which are arranged next to one another. The individual webs pass through turning crosses 10a, 10b and 10c, where they are guided over deflection rollers 13a, 13b and 13c and each subsequent web comes to lie under the previous web (s). Then they are fed to a processing line 11.

The deflection rollers can be designed as deflection guides in the form of air-flushed turning guides in order to reduce the friction. For this purpose, instead of the deflection rollers, tubes provided with openings can be provided in the air is pumped and which emerges from the openings and serves as an air cushion for the paper webs passed over it.

The paper webs 3a, 3b, 3c are guided over transverse rollers 24a, 24b, 24c, possibly wrapping them around 90 °, which lie perpendicular to the paper web extension and are arranged after the turning crosses 10a, 10b, 10c.

In the processing section 11, the three rolled webs 3a, 3b and 3c are then processed either together or independently of one another, depending on the desired processing steps. For example, Numbering units, print media (such as ink-jet or laser printers), multiflex units, staple hole stations or rotary janters can be provided for the application of parcels. Gear boxes 12 are provided for each of these freely positionable intermediate modules, each of which is provided with a 360 ° register.

The paper webs do not need to be guided over barbed belts in the processing section 11, as is known from the prior art, but are freely stretched here, and are optionally - depending on the intermediate module to be provided - via deflecting guides, optionally in the form of Deflection rollers, guided. Nonetheless, particularly since the individual paper webs can be processed independently in the processing unit, a barbed tape guide can be provided for at least one of the paper webs.

For example, a web that is moistened in the processing line will be stretched as a result. In order to compensate for this effect, the web is guided over intermediate rollers or around additional cylinders in order to maintain the necessary tension.

After passing through the processing section 11, the webs 3a, 3b and 3c are between two driven rubber cylinders 14a and 14b and fed to a further processing unit 15. In the known processing and further processing units smd train groups, which are generally designed as mechanical press rollers, are provided next to the unwind unit. No further train groups are provided after the processing line and before the processing unit. Guide rollers arranged and possibly adjustable in front of the further processing unit serve - as described in the introduction - in the known arrangements for correcting the web register, but not for building up a specific web tension.

By means of the rubber cylinders 14a and 14b, on the other hand, it is possible to build up and control the same paper tension before the further processing unit 15 over the paper web width eme. Rubber casings of different profiles can be pulled over rollers and can thus be adapted to different machining processes. For example, recesses can be provided on these rubber cylinders, into which plastic cards which are glued to one of the webs by means of a card dispenser provided in the processing section or sample packages applied by means of a rotary feeder fit. This means that the pressure on all merged webs will remain uniform at this point across the web width hm. These blanket cylinders 14a and 14b are driven, essentially in synchronism with the processing of the printed image. The paper webs are thus drawn and held over the processing section 11 hm. The basic setting will have to be carried out by the operating personnel on the basis of the control of the paper webs lying one above the other, the ongoing post-corrections during the processing operation then take place via the control devices described further below.

If necessary, the circumference of the drawing rollers can also be increased, for example by applying a further rubber coating, which increases one per revolution Pass causes. In this way, or alternatively by increasing the rotational speed of the drawing rollers, the tension can be increased if the basic tension over the processing section is sufficient.

There can also be further pairs of pull rollers provided, which are also preferably formed as a rubber cylinder. Such an arrangement is advantageous when it comes to multi-layer products, since when several paper webs are merged, air cushions tend to remain between the individual — in particular the innermost — webs, which could result in undesired modulations in the individual registers. For this purpose, at least two pairs of pull rollers should be arranged one behind the other; variations due to air cushions can thus be compensated for. However, pairs of drawing rollers could also be provided between certain processing units or units in the processing section, which may prove to be advantageous, particularly in the case of long processing sections, in order to keep the tension across the processing section secure.

In general, rolls with a standard circumference of 24 "(60.96 cm) are used as pull rolls. Both cylinder rolls 14a, 14b of the pull roll pair smd are driven, synchronously, so that the same peripheral speed is given. The axes of the two cylinders 14a, 14b are exactly aligned with one another and are perpendicular to the paper transport direction, so that the contact pressure exerted by the pair of pulling rollers on the intermediate paper webs is the same, the paper webs are transported in a straight line without the slightest wrapping curve.

It is obvious that - for example depending on the material or the flexibility of the covering of the drawing rollers - the peripheral speed of these drawing rollers must be adapted to the respective thickness of the paper web (s) guided between them. On the basis of the information available about the registration of the markings, the rotational speed of the draw roller (s) can also be modified. To this end, the control unit 19 controls a servo controller 22d for operating a servo motor 20d on the transmission 21d of the traction rollers, which are preferably in the form of rubber cylinders 14a and 14b. This ensures that the paper webs can be processed in register in the subsequent further processing unit 15. However, the correct positioning of the units of the processing unit 11 can also be set in this way. In a corresponding manner (not shown), the gears of the intermediate modules 12 can be controlled via the control unit 19.

A main drive 23 is provided for driving the take-off rollers 7 and 8, the drive for the intermediate modules 12, the rubber cylinders 14a and 14b and the individual stations of the further processing unit 15.

The further processing unit 15 can be, for example, a cutting, perforation or stapling unit. The distance between the rubber cylinders 14a and 14b and the further processing unit 15 should generally be as small as possible, since - seen in the direction of web travel - no more paper tension is maintained behind the rubber cylinders 14a and 14b. The finished products are then placed on a delivery table 16 or, if necessary, fed to additional processing, such as, for example, a book drawer or a folder.

Behind the turning crosses 10b and 10c, as seen in the direction of web travel, em web buttons 17b and 17c are provided for the second and third paper webs, respectively, and a further web button 18 is arranged directly in front of the rubber cylinders 14a and 14b. This arrangement of the path sensor 18 immediately in front of the cylinders 14a, 14b - or in front of the last of the train Pairs of rollers - will generally be of advantage since the paper webs in the subsequent further processing unit may no longer be under tension due to the processing carried out therein, may have a tendency to flutter and the reading of the registration marks becomes uncertain. The paper webs 3a, 3b and 3c have markings which are applied at specific and equal intervals. Depending on the type of path sensor, the type of marking will have to be selected, for example line markings which can be detected via photo sensors. As further shown below, the markings can have a different extent, for example wedge-shaped, transversely to the web running direction, in order at the same time to enable further information that enables the cross registration. If scanner devices are provided as path scanners which permit a raster-like scanning, the same information can also be available via the smallest reference points. Reference points in printed images - which can be freely selected in each case by pre-scanning - allow a combination of lateral registration with regard to merging the several paper webs with a registration which enables the correctly positioned sequence of processing steps for this paper web in the processing unit.

If the first marking on the first and uppermost paper web 3a is now registered by the web button 18, a signal is available via this web button 18, which signal is fed to a control unit 19.

If the operating personnel determines that the longitudinal registration is correct, a reference value is available which reflects the desired web speed and which regulates the longitudinal register of the uppermost web in relation to the further processing unit 15 - or in relation to the individual modules the processing unit 11 - allowed (the The chronological sequence of the signals available via the path sensor 18 is thus decisive).

The tension of the paper web 3a is maintained via the two rubber cylinders 14a and 14b and the take-off rollers 7 and 8 (FIG. 1). The rubber cylinders 14a and 14b either run at a somewhat higher peripheral speed than the web speed actually desired for the processing would require, or the paper tension is regulated accordingly by the take-off rollers 7 and 8. In order to ensure the required longitudinal registration, the signals available via the path sensor 18 are continuously compared in the control unit 19 with the reference value.

If the actual value differs, the control unit 19 controls — if necessary without contact — a servo controller 22a for operating a servo motor 20a on the differential gear 21a of the take-off rollers 7a and 8a on the unwind unit 1a. This makes it possible to hold back the paper web 3a somewhat, to brake (or stretch) it, so to speak.

The paper tension is thus alternately built up and also controlled via the two rubber cylinders 14a and 14b.

The other paper webs 3b and 3c must also be registered exactly lengthways, together with the first web 3a, since these three webs are processed together in the further processing unit 15, regardless of their possibly different processing.

If the second paper web 3b now passes the web switch 17b after passing through the turning cross 10b, the latter will register the markings and in each case send signals to the control unit 19. An exact longitudinal registration of the paper web 3b, specifically on the upper paper web 3a, is given when the markings of the two paper webs are congruent at the location of the web scanner 18. Now, on the one hand, the distance traveled by the second paper web 3b between web button 17b and web button 18 is known, and on the other hand, due to the pressure exerted by the two rubber cylinders 14a and 14b on the two paper webs 3a and 3b, a certain tensile force is given to both webs. It can thus be determined from the chronological sequence of the signals received via the web button 17b whether the paper web 3b is registered correctly.

Corresponding to the regulation described for the paper web 3a, that for the paper web 3b is also carried out. A servo controller 22b for operating a servo motor 20b on the differential gear 21b of the take-off rollers 7b and 8b on the unwind unit 1b is controlled via the control unit 19.

The exact longitudinal registration is also regulated in the same way for the third paper web 3c. To this end, the path sensor 17c is provided, via the signal of which a servo controller 22c is indirectly controlled to operate a servo motor 20c on the differential gear 21c of the take-off rollers 7c and 8c on the unwind unit 1c.

After passing through the rubber cylinders 14a and 14b, the merged paper webs 3a, 3b and 3c are further processed; the paper webs are generally no longer tensioned here. Therefore, in order to maintain the congruency of the webs, the further processing unit should connect as directly as possible to the rubber cylinders 14a and 14b.

A web button 17a, which is assigned to the uppermost paper web, can optionally be provided, via which an additional or alternative register control or control for the uppermost paper web 3a is possible, as already described above .

The registration achieved in this way would in itself be for paper webs which essentially have approximately the same cutting speed, sufficient - the lateral registration via the above-mentioned web edge control would result - as long as an alignment according to paper edges is desired - a sufficiently good lateral registration. But on the one hand due to the different speeds - so initial speeds of approx. 20m / sec and running speeds of 200m / sec possible - and on the other hand also due to paper webs of different thicknesses, the paper webs 3a, 3b, even if slightly, "run away" 3c after passing through the turning crosses 10a, 10b, 10c, which means that the individual paper webs are no longer correctly brought together with respect to the lateral orientation. In addition, it may be necessary to align the print images (the merged paper webs are then printed image-covering), punching and the like, which would make the lateral alignment to the paper edges inadequate. The signals available via the web sensors 18 or 17a, 17b, 17c are also used to control the cross registration.

As can be seen from FIG. 3, a motor 28a is arranged on the transverse roller 24a, by means of which the motor can be raised or lowered somewhat on one side. Due to the inclination of the axis of the transverse roller 24a, the paper web 3a will "run" away to the side. For this purpose - on the one hand - in the same way as described above with reference to the longitudinal registration - the web button 18 arranged in the area of the pulling rollers can be used, or also the web button 17a which is provided directly behind the cross roller 24a or the scanning of the marking 25 on the paper web 3a makes as long as it is still on the cross roller 24a. The information available about the registration of the markings 25 - shown here in a wedge shape for the sake of clarity - is sent to the control unit 19, via which the motor 28a on the transverse roller 24a is controlled. As can be understood on the basis of the wedge-shaped marking 25, the temporal signal sequence, on the one hand, and the duration, respectively of the respective signal eme the information enabling the longitudinal and transverse registration. The same applies to differently designed markings or scanning systems. Depending on the quality of the paper webs, a kind of paper "bubble" could arise when lifting or lowering the cross roller. In order to avoid this, it is preferable, as already mentioned above, to pivot the turnstile 10a in its entirety.

The other paper webs 3b and 3c are cross-registered in a corresponding manner. The signals available via the respective web buttons 17b and 17c are fed to the control unit, which actuate the motors 28b and 28c provided on the corresponding transverse rollers 24b and 24c, which then in each case dependent on the information available via the signals, these transverse rollers 24b and 24c raise or lower, independently of each other. In this way - in the same way as for longitudinal registration - there is also an independent but coordinated control for each of the paper webs for transverse registration.

In the known way, additional means for monitoring the individual registers could be provided in the processing section 11 in a known manner.

Following the turning crosses 10a, 10b and 10c, guide rollers 27 (indicated by dashed lines in FIGS. 2 and 3) can be provided, which may also be driven and essentially serve to guide the paper but not to clamp the paper. In the latter case, a train group, possibly in traditional training, should then be provided for correct registration for each of the trains.

Claims

PATENT CLAIMS

1. Device for bringing together and refining at least two paper or film webs, with at least two unwind units (1a, 1b, 1c), in each of which a paper web (3a) provided with markings (25) applied at regular intervals , 3b, 3c) by means of take-off rolls (7a, 8a, 7b, 8b, 7c, 8c) drawn off from a roll (2a, 2b, 2c) and, if necessary, by deflecting rolls (13a, 13b, 13c)

Turning crosses (1Oa, 1 Ob, 1 Oc) guided, merged with the at least second paper web (3a, 3b, 3c) and fed to a processing line (11) in which the at least two paper webs (3a, 3b, 3c) are preferably - if necessary go through processing units independent of one another and are fed to a further processing unit (15), characterized in that means for congruent register control of the at least two paper webs (3a, 3b, 3c) are provided, which comprise the following parts:

- Means for building up a paper tension which is substantially the same for each of the at least two paper webs (3a, 3b, 3c) over the paper web width;

- Path buttons (18, 17a, 17b, 17c) for registering the chronological sequence of the markings (25) of each paper web

(3a, 3b, 3c) and

- A control unit (19) for controlling one drive or emer device and / or one motor (28a, 28b, 28c), which is assigned to the respective take-off rollers (7a, 8a, 7b, 8b, 7c, 8c). , which is assigned to a transverse roller (24a, 24b, 24c) or the turning cross (10a, 10b, 1o), which is arranged perpendicular to the running direction of a paper web (3a, 3b, 3c).

2. Device according to claim 1, characterized in that at least one pair of tension rollers - in particular in the form of rubber rollers (14a, 14b) - is provided as a means for building up the paper tension, which after the processing section (11) and - preferably immediately - before the further processing unit (15) is arranged.

3. A device according to claim 2, characterized in that the rubber rollers (14a, 14b) are provided with a profile on their circumference for receiving corresponding finishing products.

4. Device according to claim 2 or 3, characterized in that the axes of the rubber rollers (14a, 14b) are aligned with one another and are arranged in a plane perpendicular to the direction of web travel of the paper webs (3a, 3b, 3c).

5. Device according to one of the preceding claims, characterized in that a web button (18) is provided in the region of the drawing rollers, in particular - seen in the web running direction - arranged directly in front of these, while each second web button (17b, 17c) for each non-uppermost paper web (3b, 3c) is provided in front of the processing section (11) and in particular is arranged immediately before being brought together with the at least second paper web.

6. Device according to one of claims 2 to 5, characterized in that the peripheral speed of the drawing rollers can be regulated via the control unit (19).

7. Device according to one of the preceding claims, characterized in that the further processing unit (15) connects directly to the pull rollers.

8. Device according to one of the preceding claims, that if necessary instead of a web button (18) in the area of the drawing rollers em further web buttons (17a) is provided for the uppermost paper web in front of the processing section (11).

9. Device according to one of the preceding claims, characterized in that the path sensors in the form of electro-optical sensors smd.

10. Method for merging and refining at least two paper webs, each of the paper webs (3a, 3b, 3c), which is provided with markings (25) applied at periodic intervals, in each case in unwind unit (1a, 1b, 1c) by means of take-off rollers

(7a, 8a, 7b, 8b, 7c, 8c) are each drawn off from a roll (2a, 2b, 2c) and, if necessary, guided over turning rollers (13a, 13b, 13c) on turning crosses (1Oa, 1 Ob, 1 Oc), whereupon the at least two paper webs (3a, 3b, 3c) are brought together and fed to a processing section (11), in which they pass through processing units, possibly independent of one another, and a further processing unit (15), characterized in that via the Web width of each of the at least two webs (3a, 3b, 3c) an essentially identical paper tension is built up and that the chronological sequence of the markings (25) and / or the position thereof with respect to the side edge of the respective paper web (3a , 3b, 3c) is registered, which registration in the form of signals is fed to a control unit (19), compared with a predetermined reference value and assigned to the control of one - in particular the respective take-off rollers (7a, 8a, 7b, 8b, 7c, 8c) - A drive or a braking device and / or the control of a motor (28a, 28b, 28c) is used, each of which has a transverse roller (24a, 24b, 24c) which is optionally arranged perpendicular to the direction of travel of a paper web (3a, 3b, 3c). or the turning cross (1 Oa, 1 Ob, 1 Oc) is assigned.

11. The method according to claim 10, characterized in that the paper webs (3a, 3b, 3c) are each held at least up to the end of the processing section (11) under tension.

12. The method according to claim 10 or 12, characterized gekennzeich¬ net that depending on the information about the registration of the position of the markings (25) with respect to the side edge of the respective paper web (3a, 3b, 3c) of the control unit available the respective assigned motor (28a, 28b, 28c) is assigned to it

Cross roller (24a, 24b, 24c) raises or lowers on one side.