DE10111025A1 - Embossing or coining roll gap adjustment uses markings on roll surface and endface clear or within die engravure so rolls can be turned to register markings and give required roll contact-free gap. - Google Patents

Abstract

The two embossing or coining rolls (2,3) are lined up axially by means of a first marking on the roll surface lined up with the roll engravure e.g. male and female dies. The radial alignment of the rolls is afforded by markings (12) on the roll endface (13,13a). To ensure the rolls stand parallel but without contact at any point the two sets of markings on the two rolls should be moved until the markings lie in line and in exact register, thus also adjusting to the required roll gap. The face markings run right round the roller and the endface markings over part of the respective roll and both markings are in line shape. The face marking can be clear of the die engravure or if within the die then marking (12) should be deeper and recessed clear of the blank etc in coining.

Description

The present invention relates to a setting method the necessary for the embossing and between a Embossing roller pair of existing nip with the features the preamble of claim 1 and an embossing roller for use in this procedure.

To the nip required for embossing, the two a pair of embossing rollers is formed to fit snugly ask, d. H. such that in particular z. B. in the itself known Unionwalzen the matri as embossing rollers Ze / patrix engraving, or z. B. with top-to-top engraving ten rollers, ensure that during the embossing process in the former case, the positive engraving exactly in the associated Negative gravure intervention and in the second case the corresponding embossing areas on both rollers exactly other are adapted, it is known, the related  interacting embossing rollers initially in con tact to bring that the engravings aligned are. Thereafter, the one in the known method Embossing roller relative to the other embossing roller of one Embossing roller moves so that between the rollers Forms nip, which depends on the pre material in the order of about 0.01 mm and is about 0.8 mm.

Due to the precise fit described above It is often the coining embossing rollers required that an embossing roller relative to the other embossing Rolled axially displaced or rotated radially, so that especially in the aforementioned Unionwalzensatz and the top-to-top engraved roller set Schadeni conditions may occur, some of which only become apparent in the late use and a possible shortening of the lifespan to press. This problem of damage to the engraving and the related problems then arise in particular intensifies when one embossing roller or when both embossing whales zen with a coating, in particular a plastic or ceramic coating, is or are or if the embossing rollers very fine engravings and in particular also have very fine top-to-top engravings.

The present invention is based on the object Methods of the type mentioned above available len with which it is possible to reduce the risk of damage or Pre-damage on the surfaces of the embossing rollers  seen engravings during the setting of the embossing roller gap to eliminate it.

This object is achieved by a method with the characterizing features of claim 1 solved.

The inventive method for adjusting the Embossing required and between a pair of embossing rollers standing nip provides that this whale zenspalt is set so that the two together interacting embossing rollers during their installation rela tiv to each other until the outer surfaces of the rollers on which the engravings are provided, in parallel are aligned with each other. This usually means too at the same time a parallel alignment of the two waves of Embossing rollers. By such a parallel alignment of the The lateral surfaces of the rollers are known as axis crossing switched off, generally this axis crossing on it is attributed that the lateral surfaces of the rollers, esp special due to tolerances in their storage, or on not parallel because of their arrangement. Furthermore is in the inventive method for axial alignment the embossing roller pair each embossing roller with at least one egg mark provided on the surface of the embossing arranged roller and its position relative to that on the Existing engraving is aligned while facing radial alignment of the two embossing rollers at least one Face of each embossing roller with at least one white is marked, whereby the position also  this further marking relative to that on the surface existing engraving roller is aligned. Around now the nip in the method according to the invention adjust and thus the embossing roller pair for the actual to set up embossing process, the two embossing roll while maintaining the parallelism of their man surfaces and avoiding contact between the Shell surfaces moved relative to each other until the to before described markings, both on the surface the one embossing roller as well as on the surface of the hereby cooperating other embossing roller are provided, and the other markings, both on at least one End face, preferably on the ball surface of one Embossing roller as well as on the end face, preferably on the Bale surface that other embossing rollers have been provided for aligned with each other and until a predetermined nip, d. H. a given and about the axial extent of the pre gap constant distance between the surfaces the embossing roller is set.

To clarify, it should be noted that the term shell surface Coat of the cylindrical roller referred to, while the loading gripped surface of the embossing roller the areas of the embossing roller referred to, which are provided with an engraving, it being with this surface actually not a two-dimensional one nale area, because the engraving is also relative has a radial third dimension for the embossing roller.

It is also to be clarified that setting the  Nip as well as setting up the embossing rollers in the front lying registration the exclusion of an axis crossing so like the radial and axial fitting and / or the axial and radial alignment of the surfaces of the embossing roller intended engravings mean relative to each other.

In other words, the method according to the invention takes effect in Difference to the prior art mentioned above a non-contact adjustment of the nip back where for the faultless setup of this pair of rollers on the one hand, a parallel alignment of the lateral surfaces and others on the one hand the marking provided on the embossing roller with the marking arranged on the other embossing roller and that on at least one end face of the one embossing roller provided further marking with the associated further marking on the face of the other pre roller is arranged, brought into alignment, being in The following text also briefly describes this process as alignment of the marking pair or as alignment of the further Mar Kierungspaares is named.

The method according to the invention has a number of advantages on. First of all, it should be noted that the application of the inventive method for the first time is possible for the embossing required nip, d. H. thus the one straighten the pair of embossing rollers, contactlessly adjust, see above that the problems described above, especially one Damage to the engraving or total damage to the Surface and thus a drastic reduction in stand  times of the embossing roller pair can be avoided. this in turn leads to the application of the method according to the invention to avoid wrong productions and to reduce them reduction of the monitoring effort, because here, as be is already running above, the nip touch set loose and thus a direct or latent damage prevention of the rollers. For example, surprisingly found that a by applying the inventions method according to the invention of contactlessly set rollers nip compared to an identical pair of rollers, in which the nip by initially contacting the at the embossing rollers were set, an eight to ten times longer production time allowed, since after the invented inventive method set up a nip la tent damage to the shock and scratch sensitive upper area was avoided. Also, by using the inventive method compared to a conventional process the time it takes to set the rollers couple is required to shorten considerably, being equal timely the precision of the alignment of the engravings relative to each other is increased. Due to the fact that certainly the embossing rollers required for the embossing must be produced relatively costly and the Service life of the embossing roller pair during production ver the nip set according to the invention considerably is prolonged, the method according to the invention also ent crucial to this, especially the corresponding stamping process economical and inexpensive.  

A particularly advantageous embodiment of the fiction The method provides for this to be on the surface Arrange at least two marks on each embossing roller be net, these at least two marks each because assigned to an axially outer area of the surface become. By aligning the related Mar Kierungspaares at each axial outer area of the surface Chen the embossing rollers can be used in this advantageous design of the method according to the invention particularly precise and the nip without contact, d. H. the axial alignment Adjust the direction of the embossing roller pair to each other. Due to this it is not surprising that this preferred Embodiment of the method according to the invention of the engravings interacting during embossing that can deviate axially from each other by a maximum of ± 10 µm chen.

It is particularly advantageous in the case of the previously described embodiment of the method according to the invention if the Mar cations are designed so that they are on the extend the entire circumference of the surface of the embossing rollers. This variant of the method according to the invention allows this rens that axial alignment in any position of the roller of the pair of rollers is carried out without it being necessary for this is that one of the two embossing rollers of the pair of rollers is rotated relative to the other.

Will further increase the precision of setting the Roll nip desired, so it is advisable here on one  further, particularly advantageous embodiment of the invention according to the procedure. With this training of the method according to the invention is on each end face of each embossing roller at least one of the other marks stanchions attached, so that the settings of the rollers gap, d. H. the radial setting of the engravings of the Rolling happens in such a way that the related others Marking pairs on one face and together associated further pairs of markings on the other end face che each be aligned. This will also a possibly existing axis crossing elimi ned. Such a development of the invention The method in particular also increases the precision of the Fit the engravings in the radial direction, so that during the Embossing this ensures that the scope the rollers of the pair of rollers seen the assigned to each other and on the respective surfaces of the interacting whale zenpaares are aligned with each other, the Tolerances regarding this radial fit in the Order of magnitude of ± 10 µm.

As already mentioned in the method according to the invention the markings and / or the further marking designed such that its position right relative to that on the surface of the embossing rollers Engraving is aligned. A particularly suitable development extension of the method according to the invention provides that this the marking and / or the further marking in this way is or will be that they are part of the  the surface of each engraving roll to be provided is or are. In other words, this means that preference have the marking and the other marking the same be created early with the engraving so that this markie tion and the further marking together with the engraving be produced and in particular integral stock are part of the engravings. Therefore, there is an automatic exact positioning of the engraving to the marking and the further marking without it being necessary here the position of the marker and the position of the others Align the marking exactly relative to the engraving and fix. In particular, this configuration of the method according to the invention then the marking and also the further marking designed so that it either positioned outside the engraved surfaces of the rollers is and / or that it is designed such that it rela tiv for engraving is provided radially on the inside, so that in embossed article neither the marking nor the further mar embossing.

Another, particularly advantageous embodiment of the inventions method according to the invention, in particular the exact position allows further marking relative to the engraving, stipulates that the marking with the formation of the further marking from the surface of the embossing roller to the The end face of the embossing roller is expanded as follows gend explained in more detail using an exemplary embodiment is.  

To adjust the nip in the fiction further simplify and specify procedures, without the surfaces of the embossing rollers in each other Get in touch sees a different form of inventions method according to the invention that the rollers in one Position in which the marking of one Embossing roller relative to the marking of the other embossing roller and / or in the further marking of the one embossing roller relative to the further marking of the other embossing roller un are indirectly neighboring. This means increasing the specification of the contactless setting of the rollers splits the embossing rollers relative to each other into one Positioned and preferably rotated in which the to be aligned with each other and with each other aligned marking pair and / or in which the respectively others to be aligned and aligned with each other Marking pair with the smallest possible distance from each other be positioned differently, d. H. in a position that un lies indirectly in the vicinity of the subsequent nip.

A particularly precise and simple alignment of the Markie Rungspaares or the marking pairs and also further Marking pair or the other marking pairs is at a special embodiment of the method according to the invention rens then reached when the respective marking and / or the respective further marking is linear will or will. In this case, only the lineför Marking or the linear marking of the an embossing roller on the line-shaped marking or  line marking of the other embossing roller directed and brought to flight with each other, what because of the linear configurations of the marking or the width mark alone with the eye with a high pre precision can be performed.

Especially when marking the one embossing roller relative to the marking of the other embossing roller and / or the further marking of the one embossing roller relative to the wide one marking the other embossing roller to facilitate the Adjustment and to increase the precision immediately should be arranged adjacent and the position of the embossing pair of rollers through the storage and / or the supporting them and supporting bearing element are covered, it offers in a particularly preferred embodiment of the invention according to the method that during the adjustment of the whale zenspaltes and thus during the alignment of the merged listening pair of markers and during the alignment of the other marking pair belonging together the marking and / or the further marking by means of a in the area of immediate vicinity of the pair of markers and others Pair of markings, especially in the area of the nip, arranged optical device on a screen, in front preferably on an enlarged scale, is shown or become. The alignment described above can thus be used here and adjustment of the nip by using this off design of the method according to the invention if the relevant area in which the Marking pairs and / or the further marking pairs for  Adjusting the nip are to be brought into line is covered, the use of the op tables device in connection with a screen, ins especially if an enlarged scale is selected, one Precision increase in the setting causes.

Should the previously described variant of the invention Process can be applied particularly economically, so it is particularly useful that this as an optical front direction an endoscope and a Ka assigned to the endoscope mera can be selected. On the one hand, the endoscope allows that areas that are difficult to access are relatively easy to detect and can also be displayed without it is necessary to disassemble disruptive parts, and others on the other hand, the camera ensures that the setting process stored and in particular particularly simple and preferred on an enlarged scale per screen can be jicated.

To in the previously described embodiment of the inventions The inventive method the contactless setting of Nip and the alignment required for each matching pair of markers and the alignment of each to facilitate further matching pairs of markers, will be any area in which the previously mentioned orientation follows, each assigned an optical device, wherein advantageously the relevant images of all optical devices on a single screen that in particular divided into several fields  becomes.

In a further development of the previously described embodiment of the The method according to the invention provides a particularly suitable one Modification that an endoscope is selected here, the with an adjustable pulsating light source, d. H. Consequently a light source, which is designed as a stroboscope, verse hen. This embodiment of the inventive method rens also allows the position of the embossing roller pair to be checked and thus also the nip after a predetermined loading driving time without it being necessary, the lukewarm interrupt production. By adjusting the pulse ses the pulsating light source of the endoscope because of the speed of rotation of the rollers, it is possible related marking pairs and / or the mating hearing further pairs of markings with rotating embossing roll on the screen without the pre process must be interrupted.

A particularly advantageous and versatile application design of the method according to the invention provides that axially on the surface of each embossing roller outer area a completely over the perimeter he stretching line-shaped marking is arranged. Deswei teren is on each face of each embossing roller at least one further line-shaped marking, where the alignment of each pair of markers and when aligning each additional pair of markers an optical device in the relevant area  be assigned. Furthermore, a roller of the embossing pair of rollers with regard to their location including their Dre hung in the appropriate storage while the on other embossing roller at a distance from the fixed embossing roller is ordered. By turning and / or moving the other embossing rollers that are not fixed are then each associated pairs of markers and the associated associated further pairs of markings avoiding touch the surface aligned with each other, so that on this Avoided an unwanted axis crossing and he required radial and axial alignment of the engravings the surfaces of the embossing rollers can take place. after the Embossing rollers at a distance from each other in the above have been organized in this way, so far non-fixed other embossing roller then against twisting fixed and so far while maintaining their axial and ra Dialen position on the embossing roller already fixed at the beginning moves until the desired and required nip is turned on represents is. This previously described embodiment of the inventions In particular, the method according to the invention makes it possible fast and relatively unproblematic while avoiding loading Damage to the surfaces of the embossing rollers with an extreme high accuracy to set a nip, even when the relevant nip itself by ent talking bearings or bearing elements for the embossing rollers is difficult to access from the outside.

A particularly advantageous embodiment of the previously described benen embodiment of the method according to the invention  before that on the shaft of the moving other embossing roller, the is temporarily fixed to adjust the pair of rollers, in fixed state a drive rotatable on the shaft sprocket is arranged, this drive sprocket then with a width non-rotatably arranged on the embossing roller the toothed ring is brought into mesh-free engagement. Then the drive sprocket is rotatably attached to the shaft of the other embossing roller attached, so that finally the Fixations can be released from both embossing rollers without that an undesirable change in the nip and the set fit of the engravings results. To this There are ways in this configuration of the he inventive method particularly easy and quick Assign the embossing roller pair to the corresponding drive sprockets, which also comb with each other permanently without play.

Overall, another advantage is that described above inventive method and its various configurations mentions that the process of the invention is not just a non-contact adjustment of the nip to Be beginning of the embossing process but also a check of the Position of the pair of embossing rollers and thus also of the roller gap after a predetermined operating time. For this is it is then only necessary to rela the two embossing rollers tiv to each other in a position in which the marking or the markings and the further marking or the other marks positioned adjacent to each other are so that without dismantling the bearing elements and the location tion of the pair of rollers as well as the drive sprockets and under  Avoiding contact of the lateral surfaces of the pair of rollers can be checked whether the related marking pairs and the associated other marking pairs cursed with each other. Such a simple check is not possible with the known method described at the outset Lich, since it would be necessary for this, the lateral surfaces of the To bring embossing rollers into contact with one another, so that accordingly in the known method thereby Readjustment of the nip and no check was successful would.

The present invention further relates to an embossing roller for use in the method and its previously be written configurations.

The embossing roller according to the invention provides that the embossing roller is provided with at least one marking on the Surface of the embossing roller arranged and their position rela tiv to the further engraving on the surface is aligned, the embossing roller according to the invention min at least on one of their end faces with at least one further marking is provided, the position of which is relative to the engraving on the surface of this embossing roller is aligned. The embossing roller according to the invention co-operating further embossing roller, for the Ausgestal device of the nip is also required previously described features of the embossing roller according to the invention on, but can differ from this by the design of the Differentiate engraving, especially in that the with  the coining roller according to the invention interacting others Embossing roller as an engraving on the engraving of the first embossing roller-matched engraving, which is particularly the case The case is when the embossing roller pair is a matrix / patrix gra vur owns.

The previously described in the inventive method Parts apply analogously or identically to the Invention moderate embossing roller so that to avoid repetition expressly referred to the advantages previously disclosed becomes.

A preferred first embodiment of the invention Embossing roller provides that here on the surface of the embossing roller at least two marks are arranged, wherein these at least two marks each axially outer are assigned to the larger area of the surface of the embossing roller. Will cooperate with the embossing roller according to the invention If the second embossing roller is designed analogously, this allows first embodiment of the embossing roller according to the invention a be particularly simple and axial alignment of the two embossing whales zen to each other, as previously extensively in the fiction described procedure.

In further development of the above-mentioned configuration, one sees another embodiment of the embossing roller according to the invention, that here the two marks as over the ge Mar the entire circumference of the surface of the embossing roller Kationen are formed so that the axial alignment  this embossing roller relative to one interacting with it second embossing roller can be done particularly easily without it is necessary to extend the two towards each other directing embossing rollers to rotate relative to each other.

To set the radial tolerance of the pre very precisely Rolled and an existing axis crossing relative to egg ner to cooperate with further embossing roller and eliminating it sees a different embodiment of it Embossing roller according to the invention that this on each forehead area of the embossing roller at least one of the other mar kations is attached, the other embossing roller, the to form the nip is required commonly also has appropriately marked end faces.

To ensure the exact positioning of the setting and Check the nip required marking and / or the required further marking relative to Ensuring engraving provides another, especially partial configuration of the embossing roller according to the invention, that the marking or and in particular and the white tere marking is designed so that they each part of the on the surface of the embossing roller intended engravings is or are. Will also be with the Water configuration of the embossing roller according to the invention the engraving in one operation with the marking and / or the other Mark created, is the previously in the invention Exact fixed positioning of the Marking or the further marking inevitably safe  posed.

A particularly suitable development of the previously described NEN embodiment of the embossing roller according to the invention before that the mark with the formation of the further Marking from the surface of the embossing roller on the forehead surface and especially on the bale surface of the embossing roller extends. This allows an exact definition and fixie tion of the further marking relative to the engraving.

Another embodiment of the embossing roller according to the invention has such a marking and / or such a further one Marking which is or are linear. Due to the linear design of the marking, the Clarifying the setting further increases how this too before detailed in the relevant training of the he inventive method is explained.

To prevent the marking in the Invention a corresponding pattern when embossing leaves, sees a first embodiment of the invention Embossing roller before that the marking outside the Gra is arranged on the surface of the embossing roller. Is it However, to simplify production, Mar order within the engraving, so with a second embodiment of the embossing roller according to the invention Marking designed so that the marking relative to radially deepest area of the engraving radially deeper is arranged so that when embossing with such a pre  roll the marking no embossing pattern on the embossed ar article leaves.

As already several times above with the invention Embossing roller is set out, that with the invention Embossing roller interacting further embossing roller with respect to the Marking and the other marking are identical tet, however, differs depending on the one before increasing imprint, in their engraving. So points in particular a union roller set an embossing roller with a die engraving and another embossing roller with a male engraving, while it is also possible that one with top-to-top engravings provided roller set two identically engraved embossing rollers has.

Advantageous further developments of the method according to the invention and the embossing roller according to the invention are in the Unteran sayings.

The method according to the invention is described below with the aid of Drawing explained in more detail. Show it:

Figure 1 is a schematic perspective side view of a pair of embossing rollers at the start of the position of the roller pair.

Figure 2 is a schematic illustration after adjustment.

FIG. 3 shows a roller development of the peripheral surface of an embossing;

FIG. 4 shows a top view of the schematic illustration according to FIG. 1;

Fig. 5 is a photo of a abge on a screen formed partial view of the present on the front surfaces of the embossing rolls further markers; and

Fig. 6 is a photo of a partial view abge formed on a screen of the markings present on the lateral surface of two embossing rollers.

In Figs. 1 to 6, the same parts are provided with the same reference numerals.

To set a nip 1 ( Fig. 2), which is formed between an embossing roller 2 and a co-operating embossing roller 3 , the embossing rollers 2 and 3 are arranged relatively to each other with a distance A from each other, as shown in Fig. 1 , Here, the embossing rollers 2 and 3 are held by corresponding bearings 4 and 5 , the bearing 4 of the embossing roller 2 being designed in such a way that, while maintaining the parallelism of the embossing rollers 2 and 3, this bearing 4 can be displaced in the direction of the arrow 6 and vice versa.

The outer surfaces of the two embossing rollers 2 and 3 are each provided with an engraved surface 8 , these engravings shown as examples being matrices / patrices. The development of this lateral surface of the embossing roller 2 is shown in FIG. 3 in such a way that an engraved surface 8 can be seen here schematically.

Furthermore, FIG. 1 shows an endoscope, designated overall by 7, which is provided with a camera 7 b and a corresponding adjustment stand 7 a. The head 7 c provided relative to the camera 7 b at the other end of the endoscope 7 can be brought into a position as shown in FIGS. 1 and 4, part 9 a of the bearing block being used to clarify the illustration in FIG. 1 9 of the storage 5 was broken out. This part 9 a of the bearing block 9 covers the nip 1 , as is shown in Fig. 2 by the dashed lines. Therefore, the rollers is a gap 1 on both sides of the embossing rolls 2 and 3 by the block bearings 9 covered, so that the nip 1 without the use of an endoscope from the outside is not visible here. 7

As can best be seen from the development of the outer surface of the embossing roller 2 shown in FIG. 3, the outer surface 10 has, in addition to the engraved surface 8 , a line-shaped marking 11 , both a line-shaped marking to the right and left of the engraved surface 8 11 is provided which extends across the entire surface of the embossing roller and axially limits the engraving. In addition to these two line-shaped marks the outer surface of the ball surface is provided with linear ausgebil Deten other marks 12, the least strain from the line-shaped marks 11 on the peripheral surface 10 toward from the end face 13 over the entire From 13 extend a.

In order now to set the nip 1 shown in FIG. 2, it is first necessary to arrange the embossing rollers 2 and 3 within the bearings 4 and 5 of the bearing block 9 with A from such that it is shown in FIG. 1 ge. Thereafter, an endoscope 7 is positioned on one side of the bearing block 9 , the endoscope 7 comprising a measuring head 7 c and a camera 7 b, as shown in FIG. 1 for the front side of the bearing block. The measuring head of this one endoscope looks into the gap to be set.

Furthermore, two endoscopes are aligned so that their measuring heads are directed at the respective end faces, as is indicated in FIG. 4 by the arrows, so that these two measuring heads roll on each end face of the embossing 2 and 3 in the region of their ball surfaces Show 13 a arranged further markings 12 on a screen.

In FIGS. 5 and 6, the respective images of the endoscope 7 are shown on the screen. Here, Fig. 5 shows a of the embossing rolls 2 and 3 or the reproduction of both sides vorgese Henen additional marks 12 on the other ball surfaces 13 a of the embossing rolls 2 and 3, wherein in the playback of the provided on both sides additional marks 12 on the ball surfaces 13 Fig. 5 also shows the nip 1 . The image scale is correspondingly enlarged, the two further markings 12 having to be aligned so as to set the radial alignment of the engravings present on the two embossing rollers, as is shown as an example in FIG. 5 for an end face. This radial alignment of the embossing rollers 2 and 3 is achieved in that by rotating the embossing rollers 2 and / or 3 arranged at a distance A, the alignment of the further markings 12 described above can be achieved and as shown in FIG. 5, so that the engravings on the surfaces 8 of the embossing rollers 2 and 3 are precisely matched and aligned with respect to their radial fit and with the elimination of the axis crossing. Then the embossing rollers 2 and 3 are fixed in a rotationally fixed manner.

In order to achieve the required axial alignment of the embossing rollers 2 and 3 , the bearing 4 is moved perpendicularly to the direction of the arrow 6 until a picture of the endoscope is captured on the screen, as shown in FIG. 6. During this movement, care is taken to avoid contact between the engraved surfaces of both embossing rollers 2 and 3 .

In the embodiment shown in Fig. 6 illustration, the provided on the engraved surface 8 of two embossing rolls marks 11 are aligned in such a way in the area of the nip 1, as shown in Fig. 6. After the axial alignment of the embossing roller has been carried out with the aid of the markings 11 on both sides of the bearing of the embossing roller, the bearing 4 of the embossing roller 2 is displaced in parallel on both sides in the direction of the arrow 6 until it is shown in FIG. 2, previously defined nip 1 . Thereafter, a two-part drive turntable is positioned and fixed on the shaft of the embossing roller 2 in such a way that this two-part drive turntable combs with the drive turntable, which is fixedly mounted on the shaft of the embossing roller 3 , so that the nip 1 has been set precisely and precisely is without the gra fourth surfaces 8 of the two embossing rollers 2 and 3 have touched during the setting.

After setting this nip, which is connected with egg exact radial and axial adjustment of the engravings, the endoscopes required for this and the rotationally fixed fixation are removed from both embossing rollers, so that the embossing roller pair 2 and 3 is ready for operation.

If the position of the roller gap and the associated axial and radial adjustment of the engravings are now to be checked after a predetermined operating time, it is only necessary to arrange the endoscopes described above at the locations mentioned there and the markings 11 on both embossing rollers and the others Markings 12 on the bale surfaces 13 a of both embossing rollers to move to this point, so that by endoscopic imaging these pairs of markings 11 and 12 by endoscopic imaging of these further pairs of markings can be checked very easily whether the existing setting of the roller gap 11 is still exact true, since only in this case does an image appear on the corresponding screen, as shown in FIGS. 6 and 5. In the event of an undesired deviation, the associated marking pairs 11 and / or the associated marking pairs 12 are no longer aligned with one another and are also no longer in alignment, so that it would be necessary to readjust the roller gap.

Using stroboscopic lighting, how to continue As described above, the roller position can be checked even without interrupting production during operation consequences. This is particularly important if the Roll rotation set dynamic effects that the rolls influence position relative to each other.

Claims (23)

1. A method of adjusting the union for the embossing union and existing between a pair of embossing rollers, the gap is adjusted by the fact that the two embossing rollers are moved relative to each other until the outer surfaces of the rollers are aligned parallel to each other, characterized in that for the axial alignment of the embossing roller pair, each embossing roller is provided with at least one marking, which is arranged on the surface of the embossing roller and whose position is aligned relative to the engraving on the upper surface, that for the radial alignment of the two embossing rollers at least one end face of each Embossing roller is provided with at least one further marking, the position of this further marking being aligned relative to the engraving existing on the surface of this embossing roller, and that the surface of the embossing rollers while maintaining the parallelism of the surface and under Verm Eating a contact between the lateral surfaces are moved relative to each other until the markings and the other markings are aligned and a predetermined roller gap is set. 2. The method according to claim 1, characterized in that on at least two marks on the surface of each embossing roller stanchions are arranged, these at least two Mar an axially outer area of the surface be assigned. 3. The method according to claim 2, characterized in that the two markings as extending over the entire scope of the Markings extending surface of the embossing rollers be formed. 4. The method according to any one of the preceding claims, characterized characterized in that on each face of each embossing roll at least one of the other markings attached becomes. 5. The method according to any one of the preceding claims, characterized characterized in that the marking and / or the further Mar Kation is designed so that they are each Part of the surface of each embossing roller the engraving to be provided is. 6. The method according to any one of the preceding claims, characterized characterized in that the marking with the formation of the white marking from the surface of the embossing roller onto the  End face of the embossing roller is expanded. 7. The method according to any one of the preceding claims, characterized characterized in that the adjustment of the nip Rollers are brought into a position in which the Markie one embossing roller relative to the marking of the other Embossing roller and / or the further marking of the one embossing roll relative to the further marking of the other embossing roller are immediately adjacent. 8. The method according to any one of the preceding claims, characterized characterized in that the marking and / or the further Mar Kierung is or will be linear. 9. The method according to any one of the preceding claims, characterized characterized in that during the adjustment of the nip the marking and / or the further marking by means of a arranged in the area of the nip optical Vorrich tion on a screen, preferably in an enlarged Scale, is or will be shown. 10. The method according to claim 9, characterized in that as an optical device an endoscope and the endoscope assigned camera can be selected. 11. The method according to claim 9 or 10, characterized in net that each pair of markers and each additional markie tion pair each assigned an optical device the.   12. The method according to claim 10 or 11, characterized in net that such an endoscope is used as an endoscope, provided with an adjustable pulsating light source is. 13. The method according to any one of the preceding claims, characterized characterized in that on the surface of each embossing roller in each case in the axially outer area, one over the circumference completely extending line-shaped marking arranged will be that on each face of each embossing roller at least one further line-shaped marking is applied, that when aligning each pair of markers and egg nes of each additional pair of markings in this regard an optical device can be assigned that a roller of the embossing roller pair fi with respect to their position is xiert and that the other embossing roller at a distance from the fixed embossing roller is arranged that the each too associated pairs of markers and the associated Wei tere pairs of markers by rotating and / or moving the other fixed embossing roller aligned with each other be that the other embossing roller so aligned then against a twisting is fixed and so far while maintaining ih axial and radial position on the fixed embossing roller is moved until the desired nip is set. 14. The method according to claim 13, characterized in that relative to the shaft of the moving other embossing roller this shaft rotatable drive sprocket arranged and the  art is fixed that this drive sprocket with a the embossing roller arranged in a rotationally fixed manner in backlash-free Combing is brought in that the drive sprocket here after fixed to the shaft of the other embossing roller and that the fixations are finally released. 15. embossing roller for use in a method according to any one of the preceding claims, characterized in that each embossing roller ( 2 , 3 ) with at least one marking ( 11 ) is provided on the surface ( 8 ) of the embossing roller ( 2 , 3 ) ordered and whose position is aligned relative to the engraving on the surface and that at least one end face ( 13 a, 13 ) of the embossing roller ( 2 , 3 ) is provided with at least one further marking ( 12 ), the position of which further marking ( 12 ) is directed relative to the engraving present on the surface of this embossing roller. 16. embossing roller according to claim 15, characterized in that on the surface ( 8 ) of the embossing roller ( 2 , 3 ) at least two markings ( 11 ) are arranged, these at least two markings ( 11 ) each having an axially outer region of the surface of the embossing roller assigned. 17. embossing roller according to claim 16, characterized in that the two markings ( 11 ) as over the entire order to the surface ( 8 ) of the embossing roller ( 2 , 3 ) extending markings ( 11 ) are formed. 18. embossing roller according to one of claims 15 to 17, characterized in that on each end face ( 13 a, 13 ) of the embossing roller ( 2 , 3 ) at least one of the further markings ( 12 ) is attached. 19. Embossing roller according to one of claims 15 to 18, characterized in that the marking ( 11 ) and / or the further marking ( 12 ) is or are designed such that they are in each case part of the on the surface ( 8 ) of the embossing roller ( 2 , 3 ) provided engraving is or are. 20. embossing roller according to one of claims 15 to 19, characterized in that the marking ( 11 ) with formation of the further marking ( 12 ) from the surface ( 8 ) of the embossing roller ( 2 , 3 ) on the end face ( 13 , 13th a) the embossing roller ( 2 , 3 ) extends. 21. embossing roller according to one of claims 15 to 20, characterized in that the marking ( 11 ) and / or the further marking ( 12 ) is or are linear. 22. embossing roller according to one of claims 15 to 21, characterized in that the marking ( 11 ) outside of the engraving on the surface ( 8 ) of the embossing roller ( 2 , 3 ) is arranged. 23. embossing roller according to one of claims 15 to 21, characterized in that the marking ( 11 ) is arranged radially deeper relative to the radially deepest region of the engraving.