DE10043989B4 - Embossing roller for the production of tissue articles - Google Patents

Abstract

embossing roller for the production of tissue articles, in particular for the production of paper tissues, Hygiene articles, kitchen towels or Napkins, two engraved rolls are provided and each Roller on its surface at least one over the roll surface Having projecting and designed as webs engraving, characterized characterized in that an embossing roller pair forming engraved rollers (1, 2) aligned in such a way are that the for the common character the embossing nip (11, 12) forming the tissue article by the aligned radially outer web portions (6) of the Rolls (1; 2) is formed, that each roller of the embossing roller pair (1, 2) has an exactly identical engraving (3, 6) or that each roller (1; 2) has such an engraving (3, 6) which is only in the axial distance of the webs (3) is different.

Description

The The present invention relates to an embossing roller for the production of Tissueartikeln with the features of the preamble of the claim 1.

Around Tissueartikel, in particular paper tissues, kitchen towels, toilet paper, napkins, Placemats, sanitary towels, o. The like. The usually at least two interconnected layers of a pulp-like material, it is known, the tissue article forming at least two layers by embossing by means of an arranged in a calender embossing roller pair with each other connect to.

For example, describes the DE 196 26 997 Such an embossing process for producing a multi-layered tissue article, wherein the respective layers to be joined together are first arranged one above the other and embossed by means of a pair of embossing rollers such that brought about by a mechanical deformation in the area caused by the engraving embossing the cohesion of the tissue article forming layers becomes. The embossing roller pair used in the known method provides for a roller engraved according to a predetermined pattern, while the relevant counter-roller, which forms the embossing roller pair together with the engraved roller, is a non-engraved roller.

The US 3,961,119 describes generic embossing rollers, which are provided on their surface with web-like engravings. In this case, these web-like engraved embossing rollers do not form an embossing roller pair which serves for simultaneous and joint embossing of the layers forming the tissue article. Rather, in this prior art, the first layer and the second layer are embossed separately, with each of the two layers being guided for this purpose through an embossing nip formed by an engraved roller and a smooth roller cooperating therewith. The layers embossed in this way are then adhesively bonded to one another with the aid of a pair of rollers, the adhesive dots being positioned in the interior thereof over the cross section of the finished tissue article.

In addition to the above-mentioned prior art is still on the EP 0 370 972 B and WO 97/20688 A, in which there is also a separate embossing of the layers forming the tissue article, wherein for this embossing also an engraved embossing roller is used in conjunction with a smooth roller and thereafter the two pre-embossed layers are selectively bonded together. In contrast to US 3,961,119 grab those EP 0 370 972 B and WO 97/20688 A for the separate pre-embossing of the individual layers on an engraved roll back, but which has on its surface an engraving consisting of a dot pattern.

Around to ensure in the prior art described above that the relevant stamping surfaces or points over the cross section of the embossed Tissueartikels seen closer placed to the center, the known method requires special Engravings immediately after the embossing over those caused by the engraving Adhesion a deformation of the embossing surfaces or the embossing points inside the embossed Effect tissue article.

at the known method and the embossing roller pairs used for this purpose However, there is a risk that the for the Relocation of the embossing points or Embossing surfaces ins Inside the tissue product required adhesion is not required Time, which is in the range of fractions of a second, has ended. this leads to then that the Tissueartikel with a relatively large force of the engraved embossing roller must be deducted whereby it is then very easy for a tearing of the embossed tissue article, possibly associated with an undesirable Winding the remaining web of the tissue article on one of Rolls of the pair of rollers, can come. Therefore, must in the known methods are always expected to be disrupted production.

Of the present invention is based on the object, an embossing roll for the production of tissue articles, in particular for the production of paper tissues, Kitchen towels, toiletries, napkins, Toilet paper and / or placemat, the aforesaid Kind available to provide a reproducible embossing of the tissue article effective prevention of production interruptions.

These The object is achieved by a embossing roller solved with the characterizing features of claim 1.

The embossing roll according to the invention for the production of tissue articles, in particular for the production of paper tissues, hygiene articles, kitchen towels or napkins provides two engraved rollers, each roller has on its surface at least one over the roller surface protruding and formed as webs engraving. The engraved rollers forming an embossing roller pair are aligned with each other in such a way that the embossing gap required for the common embossing of the layers forming the tissue article is formed by the aligned radially outer web sections of the rollers. Every roll of the Embossing roller pair has an exactly identical engraving or each roller has such an engraving, which differs only in the axial distance of the webs.

With In other words, in the case of the embossing roll according to the invention, the two engraved, paired and cooperating rolls comprises the imprint and the resulting deformation of the superimposed layers of the tissue article such that the Embossing nip exclusively by the aligned radially outer engraved sections of the formed on both rollers provided web-like engraving, wherein each roller of the embossing roller pair has an exactly identical engraving or engraving, the only differs in the axial distance of the webs. This leads to, that everybody Embossing point or every embossing surface, the hereinafter also referred to together as embossing zone, with each other cursing and over the thickness of the embossed Tissueartikels are arranged in the middle.

The embossing roll according to the invention has a number of advantages. So first, it should be pointed out that in comparison to the above-mentioned prior art in the embossing roll according to the invention no specially designed and adherent embossing zones are to be provided, since by the special orientation of the engravings described above of both rolls relative to each other inevitably the layers of Tissueartikels both from the surface as well as from the lower surface at the same points inwards, forming the embossing zones be deformed, with the result that the forces required are around the embossed Remove tissue from each roller, are identically the same size, but are directed opposite, so that these forces mutually cancel. This in turn leads to that at the embossing roll according to the invention the unwanted Winding up the embossed Tissueartikels on a roller of the roller pair inevitably and Thus, it is particularly easy to prevent so that disturbances and interruptions production, such as tearing the embossed tissue article and / or an undesirable Winding up the embossed Tissueartikels on one of the two engraved rollers prevented becomes.

Furthermore has the embossing roll according to the invention still the advantage that both Embossing rollers, which are preferably engraved identically or engraved itself only differs in the axial distance of the webs, especially evenly wear what especially not the case, if, as in the introduction Prior art, an engraved roller with a non-engraved roller the for the imprint form required embossing gap. Furthermore, surprisingly be found that a such, over identically shaped and from the surface as well as the lower surface of the imprinted Tissueartikels inward-facing embossing zones, which, as already above is described above the thickness of the embossed Tissuearticles seen predominantly and preferably exclusively arranged in the middle area, an excellent solid connection effect the individual layers of Tissueartikels so that this Lays permanently at the later Use over such special deformation are connected to each other, even if the layers are not additional are still glued together. This causes that in the using the embossing roll according to the invention manufactured tissue articles a partial or complete supersede of individual locations or locations even under extreme conditions of use could not be observed. Furthermore, the roller with the embossing invention manufactured tissue article both on its surface as also on its lower surface identical properties because these two surfaces due to the special Arrangement of the embossing zones identical are deformed, so that the surface of the lower surface such an embossed Article regarding their properties, in particular with regard to the smoothness, of Grip, softness, absorbency and / or strength, does not differ, provided that for the upper and lower layer identical material is used. All in all thus contributes the embossing roll according to the invention to simplify production and improve the properties of the hereby embossed Tissueartikels at.

The embossing roll according to the invention, the for embossing each as engraved embossing roller pair is used, has such an engraving on a variety of on the roll surface arranged webs comprises. Such webs can be under relatively favorable conditions by the usual engraving techniques produce, as a further advantage of such web-like engraving It is to be pointed out that the Wear this web-like engraving compared to the specially shaped engravings of the prior art he considerably. is reduced.

at an embodiment of the embossing roller according to the invention are as webs on the roll surface each engraved engravings arranged spirally, such spirally running ridges diamond-shaped embossing zones in the embossed Cause tissue article. Such a configuration of spiral webs the roll surface Each roller has the decisive additional advantage that the wear of the engraving is minimized and in particular that in this case a Einjustierung the engravings of the first roller relative to the second roller of the embossing roller pair in terms of his effort is minimized.

Basically exists the possibility, that the Webs on the roll surface every embossing roll are arranged and extend in a spiral over the roll surface, as a linear and thus continuous webs are configured. A special sees suitable and advantageous development of the embossing roller according to the invention before, that here However, the webs formed of a plurality of web elements are, with successive web elements by radially inward pointing recesses are separated. Such Embodiment of the embossing roller according to the invention let yourself relatively inexpensive produce and allow the formation of relatively small-scale embossed zones, so that through the density and size of the embossing zones the feel and in particular the softness of the embossed tissue article not in unwanted Way impaired but still ensures that the layers so embossed due to the large number of very small-scale embossing zones permanently together are connected.

Basically exist in the embossing roll according to the invention two possibilities, like the engravings on the surface the two embossing rolls, the the embossing roller pair to train, to design.

So sees the first possibility before, that here both embossing rolls have different engravings, with these engravings on the roll surface each embossing roll according to the invention are provided, formed from the webs described above are. Here, the axial distance from adjacent webs of on the surface the one embossing roll arranged webs larger than the axial distance from adjacent webs on the surface of the other embossing roll provided Webs, which has the consequence that the density and / or the size of the embossing zones of with such a pair of embossing rollers imprinted Tissueartikels modified and in particular can be reduced. By an axial displacement of an embossing roll relative to the other embossing roller of the embossing roller pair can then additionally nor the density and / or the dimension in which with such Embossing roll pair imprinted Tissue products can be varied to the respective requirements, whereby the versatility of such an embodiment of the embossing roll according to the invention is enlarged.

Especially It is advantageous in the previously described embodiment of Embossing roll when the axial distance from adjacent lands on the roll surface of the an embossing roll is larger by a factor of 1.5 to 2.5 as the axial distance of the adjacent webs on the surface of other embossing roll, So that the radially outer engraving sections the embossing rollers while of the stamping process only partially under refinement corresponding to small-area embossing zones aligned with each other. Such a reduced number in particular of small area embossing zones then causes an increase the absorbency and a very pleasing softness of the embossed Tissue article.

at the second possibility already mentioned above each of the two embossing rollers according to the invention, the the embossing roller pair train, on their surface an identical engraving, so that in this case the required for the embossing embossing gap through the full area the aligned radially outer engraved sections of the embossing rollers is trained. With such an embodiment of the embossing roll according to the invention In particular, such tissue articles are produced in which the layers to be joined together particularly durable and durable to be connected to each other.

A Other, particularly advantageous embodiment of the embossing roll according to the invention accesses such a pair of rollers, in which each embossing roller at least one about the Has circumferentially extending spacer ring, wherein the spacer ring further radially outward relative to the engraving. Here are these Both, the roller pair forming embossing rollers during the embossing process arranged so that the spacers, the outside of the to be embossed Article are arranged while of embossing touch, over the radially outward pointing dimension of the spacer ring relative to the radial height of the engraving inevitably the thickness of the embossing gap is determined. In particular, if at each embossing roll then provided at each axial end at least one spacer ring is, deleted in such a pair of embossing roller designed during the embossing process the complex adjustment and setting of the embossing gap, since the embossing gap by embossing yourself touching Spacer rings is forcibly formed. Surprisingly, this has shown that the Wear the Engraving almost the wear of the Distance rings corresponds, so that over a extremely long period of use the dimension of the Prägespaltes remains constant and thus in this embodiment of the embossing roll according to the invention via a long period of use a uniform character is brought about.

Basically the radially outward pointing dimension of the spacer ring relative to the engraving after the Thickness and the number of layers of the tissue article to be embossed together and the desired Positioning the position of the embossing zones, relative to the thickness of the embossed Tissue article.

Become in the embodiment described above the radially outward pointing dimensions of the provided at each embossing roller spacer ring designed identically, so are the generated by the engraving Embossing zones over the Thickness of the embossed Tissueartikels seen exactly in the middle. However, instruct the the one embossing roll each end provided spacers a smaller radial outward directional dimension than the end to the other, the pair of rollers forming embossing roll provided spacers, so shifts relative to the thickness of imprinted Tissueartikels the position of the embossing zones out of the center in the direction of the embossing roll, their spacers a larger radially to Outside have pointing distance. This makes it possible to specifically properties the surface or the lower surface of the embossed To change tissue products, so in particular their softness, grip, their absorbency and / or their strength.

Becomes the embossing roll according to the invention for Shape used by two- to eight-ply tissue articles, so has shown here that preferably each spacer ring relative to the engraving by 0.2% to 10%, based on the radially outward pointing dimension of the engraving, further radially outward points. In particular, the spacers have such a radially outwardly facing Dimension further outward from 0.005 mm to 0.1 mm as provided on the embossing roll surface Engraving. Such manufactured tissue articles have excellent Properties, especially an excellent wet and / or Dry strength.

Basically exists in the embossing roll according to the invention the possibility, the cross section of the engraving forming webs or web elements to make arbitrary, but rectangular or trapezoidal shaped Cross sections of the webs or the web elements are preferred. Hereby points then designed as a web engraving of each roller a variety from radially outer and parallel to the axis extending web portion, wherein during the embossing the web portions of a roller relative to the web portions the other roller are aligned so that these Web sections then aligned with each other forming the embossing gap and so when embossing of tissue product desired internal embossing zones form.

A high wear resistance have such embodiments the embossing roll according to the invention on, in which each web has an axial width between 0.2 mm and 1.4 mm, preferably an axial width of 0.5 mm to 0.9 mm. in this connection such webs allow the production in particular of such internal embossing zones, the in a multi-layered tissue article a particularly permanent fixation the individual layers guaranteed each other.

Especially when the embossing roll according to the invention between adjacent webs such recesses, whose axial dimension between 1.0 mm and 10.0 mm, preferably between 1.2 mm and 1.5 mm, has such an embodiment excellent properties for the generation of sharp contours internal embossing zones, because these wells with the dimensions given above are not so quickly pollute by abrasion of the sheet material.

Basically in the embossing roll according to the invention the radial height of each bridge on the one hand after the number to be joined by embossing as well as the single thickness of the layers and on the other hand according to the thickness of each tissue article to be produced, the radial heights of each Preferably bridge between 0.1 mm and 1.5 mm vary.

As previously in one embodiment of the embossing roll according to the invention is described this preferred embodiment of the embossing roll as a spiral webs designed engraving, these spiral webs then in particular at an angle α between 35 ° and smaller as 90 ° and preferably between 45 ° and 85 °, relative to the roll axis, are aligned. Here's a surprise shown that such, diagonally to Roll axis aligned webs high wear resistance own, which is due to that everybody Point of the jetty during the operating time of the embossing rollers evenly worn.

As already stated above, in a preferred embodiment the embossing roll according to the invention each web formed as a cross-sectionally rectangular web. These rectangular design of the bridge ensures that on the one hand the radially outer web portion sufficiently large dimensioned embossing zones allows and on the other hand, a high Ver wear resistance of the engraving is given.

If with the embossing roller according to the invention such tissue articles are produced in which only selected areas have the embossing zones, then an embodiment of the embossing roller according to the invention is used, in which at least one roller of the roller pair has at least one section in which the roller surface is not provided with any engraving , Here, this is at least one section according to a predetermined pattern between the outward facing Engraving and in particular arranged between the plurality of webs, so that when embossing using such an embossing roll not the entire surface of the tissue article with embossing zones but only selected areas of the tissue article are provided with embossing zones, while in other areas, the tissue article forming layers not with each other , are connected.

Especially make the non-engraved sections described above the least an embossing roll between 20% and 70% of the roll surface of the respective roll, Such an embodiment of the embossing roller according to the invention especially for the production of napkins, sanitary towels or handkerchiefs is used.

Preferably For the preparation of the tissue article, an embossing roller pair is used each embossing roll according to the invention a roll diameter between 100 mm and 1000 mm, preferably between 200 mm to 500 mm, has, with the like rolling yet are relatively inexpensive to produce and beyond an extremely long life in the production of tissue articles.

Regarding the Density of the embossing roll according to the invention envisaged engraving is noted that this engraving on the one hand after the desired Fixation of the tissue article forming layers and on the other according to the particular use of the tissue article. Especially are suitable for this Engraving, in particular also the webs or web elements described above, in which the stamping zones produced thereby an area between 0.1% and 60%, preferably between 10% and 35%, based on the entire surface of the embossed Tissueartikels, ingest.

In particular, when the embossing roller of the invention is provided on its surface with such an engraving, that the number of embossing zones produced thereby between 5 and 90, relative to 1 cm ² surface of the embossed tissue product varies, permanently solidified by embossing tissue products can be produced. In this embodiment of the embossing roller according to the invention thus relatively small-scale embossing points, preferably between 20 and 70 embossing points per cm ² surface, produced as internal embossing zones, which in particular by the plurality of embossing point, a mechanical Verkletten and hooking the individual layers is guaranteed. This in turn means that such embossed tissue article has a high mechanical strength of the interconnected layers, so that in this way can be produced such Tissueartikel, which in particular also have the previously described, non-embossed sections.

Already repeatedly described above, that the embossing roll according to the invention used in the manufacture of the tissue article as embossing roller pair, optionally, each roller of the pair of rollers exactly identical Engraving or has such an engraving, which is only in the axial Distance of the webs is different, as these two possibilities are described above.

Under Tissueartikel be in the context of the present description such Article understood in which at least two layers, in particular two paper layers, by a mechanical deformation of selected zones the layers are connected to each other, where appropriate, additionally these layers can still be glued.

advantageous Further developments of the embossing roller according to the invention are specified in the subclaims.

The embossing roller according to the invention described above will be explained in detail below with reference to four exemplary embodiments in conjunction with the drawing. Here, the first embodiment is based on the 1 to 4 , the second embodiment with reference to 5 to 8th , the third embodiment with reference to 9 and the fourth embodiment with reference to 10 and 11 explained in more detail, wherein in all 1 - 11 the same objects are provided with the same reference numerals.

in the single show:

1 a schematic partial side view of a first embodiment of two, arranged in a pair of embossing rollers embossing rollers;

2 a settlement of the mantle of the lower in 1 illustrated roller;

3 a section in the top view of the with in 1 shown roller pair embossed article;

4 a sectional view taken along the line AB in 3 ;

5 a schematic side view of a second embodiment of an embossing roll;

6 a settlement of the cloak of in 5 imprinted embossing roll;

7 a section of the with in 5 shown roller embossed article;

8th a sectional view taken along the line AB in 7 ;

9 a schematic side view of a third embodiment of the embossing roll, shown as a pair of rollers;

10 a schematic partial side view of a fourth embodiment of two, arranged in a pair of embossing rollers embossing rollers;

11 a section in the top view of the with in 10 shown roller pair embossed article;

In 1 a first embodiment of the embossing roller according to the invention is shown, in which case an embossing roller pair is shown, which is an upper embossing roller 1 and a lower embossing roller 2 includes.

The upper embossing roller 1 is with one as webs 3 trained engraving provided, with these webs 3 as a continuous web line spirally over the roll surface of the upper embossing roll 1 extend. The uninterrupted footbridges 3 are at the in 1 shown embodiment at an angle α of 70 ° relative to the roll axis 5 aligned.

Furthermore, the cross-sectionally rectangular webs are 3 with radially outer and parallel to the axis 5 extending web sections 6 Mistake. Between adjacent footbridges 3 are each a plurality of radially inwardly facing recesses 7 (Depressions) available. The bridges 3 have in the embossing roll shown one from the roll core 4 radially outward dimension (height) of 0.2 mm, while the width of the recesses 7 (Wells) is 1.5 mm. The dimensions of the webs 3 and the recesses 7 are above the roll surface of the embossing roll 1 unchanged.

In the 1 furthermore depicted lower embossing roller 2 used in embossing the tissue article along with the top embossing roller 1 cooperates, with the exception of an exemplary drawn section 8th the same structure as this above for the embossing roll 1 is described. In other words, thus are in the lower embossing roll 2 also footbridges 3 at an angle α of 70 ° relative to the roll axis 5 ' aligned, being between adjacent webs 3 each a plurality of radially inwardly facing recesses 7 available.

In the 1 example shown section 8th has no web-like engravings and therefore no gaps. Rather, the section 8th formed by the fact that here the roll core 4 ' is ungraviert.

In again 2 illustrated development of the shell of the lower embossing roll 2 it can be seen, are distributed uniformly over the circumference of two unembossed sections 8th respectively. 8th' provided so that in these sections 8th respectively. 8th' in an embossing of the required for the production of the tissue article and to be embossed layers these layers in these sections 8th respectively. 8th' not be embossed. Therefore, with the embossed tissue article in the sections 8th respectively. 8th' There are no internal embossing zones, so that here in the desired manner the tissue article over a relatively large area is particularly voluminous and soft.

This also comes in the 3 and 4 , which in each case the embossed tissue article in the plan view ( 3 ) and on the other hand in the sectional view ( 4 ) are clearly expressed.

Like that 3 and 4 can be seen, the total with 9 designated embossed articles a variety of diamond-shaped embossed zones 10 on, outside the unembossed section 8th available. In this case, these internal embossing zones are created by radially outwardly projecting webs of both embossing rollers 1 respectively. 2 ( 1 ) form the actual embossing gap during the embossing process, these embossing zones 10 about the thickness of the embossed article 9 are arranged exactly in the middle, as clearly the 4 can be seen. Through this variety of rhombic embossing zones 10 become the exemplified two layers 11 and 12 under training of the tissue article 9 permanently connected.

In the 5 to 8th Below, the second embodiment of an embossing roll is explained in detail.

In 5 is schematically illustrated this second embodiment of the embossing roll, wherein 5 in contrast to 1 only the lower embossing roller 2 maps. This lower embossing roller 2 and a co-operating upper embossing roller, not shown, has a plurality of web elements on its surface 3 ' on, of which three web elements 3 ' in example 5 are drawn. In this case, between adjacent web elements each have a plurality of radially inwardly facing recesses 7 present, with these recesses to the roll core 4 the roller 2 extend inwards. Furthermore, there are successive web elements 3 ' by further, radially inwardly facing recesses 13 separated from each other, these further, radially inwardly facing recesses 13 also until the roll core 4 pass. Through these further, radially inwardly reaching recesses 13 is achieved that the number of embossing zones compared to the number of embossing zones in the 1 to 4 shown first embodiment is reduced.

Furthermore, the in 5 shown embossing roll 2 a section 8th which has no engraving, as already described in the first embodiment.

In the 5 shown lower embossing roller 2 is used for embossing the tissue article together with an upper embossing roller (not shown), as is described in principle in U.S. Pat 1 shown and explained there. In contrast to the upper embossing roller shown there 1 has the with the in 5 pictured lower embossing roller 2 cooperating upper embossing roller over its entire embossing roller shell evenly distributed web elements 3 ' on, with successive web elements 3 ' through more recesses 13 and adjacent web elements 3 ' through the recess 7 are interrupted, so that accordingly the upper embossing roller is engraved as in 5 for the engraved zones of the lower embossing roller 2 is shown.

As the development of the embossing roll shell of the lower embossing roll 2 according to 6 can be seen, has the lower embossing roll 2 two non-engraved sections 8th respectively. 8th' on, as otherwise stated above for the first embodiment with reference to 2 was explained.

The 7 and 8th form a top view of the embossed tissue article ( 7 ) and a sectional view of the embossed tissue article ( 8th ).

Like that 7 and 8th can be seen, the total with 9 designated embossed articles a variety of diamond-shaped embossed zones 10 on, outside the unembossed section 8th are provided. This creates these internal embossing zones 10 characterized in that radially outwardly jumping webs of both embossing rollers form the actual embossing gap during the embossing process, said embossing zones 10 about the thickness of the embossed article 9 are arranged exactly in the middle, as clearly the 8th can be seen. Through this variety of diamond-shaped embossing zones 10 become the exemplified two layers 11 and 12 under training of the tissue article 9 permanently connected.

Unlike the one with the in 1 In the first embodiment of the embossing roll shown embossed tissue articles have the in 7 with the in the 5 imprinted embossing roller embossed embossed zones 10 on, whose distance and density is substantially smaller than the distance and the density of the embossing zones produced by the first embodiment 10 How to easily compare the 3 and 7 can be seen. This is due to the fact that in the second embodiment, the embossing rollers ( 5 ) between successive web elements 7 further, radially inwardly facing recesses 13 have, so that in this case the density of the embossing zones in the longitudinal direction of the embossed article is reduced accordingly.

In the 9 pictured third embodiment of the embossing rollers 1 respectively. 2 corresponds in their engraving exactly the embossing roller pair, as in connection with above 1 was explained. In addition, however, has the embossing roller pair 1 respectively. 2 according to 9 spacers 14 respectively. 14 ' on, with each embossing roll 1 respectively. 2 each end a spacer ring 14 respectively. 14 ' has.

Like from the 9 is clearly recognizable, have the spacers 14 respectively. 14 ' relative to the jetties 3 by the amount h, which makes 0.015 mm in the embodiment shown, further radially outward. The axial dimension d of these spacers 14 respectively. 14 ' is 50 mm.

These spacers cause this 14 respectively. 14 ' in that during the embossing process for the production of the tissue article the engravings 3 the upper roller 1 or the lower roller 2 be kept at a distance, so that automatically sets a desired embossing pressure and a desired Prägespaltdimension in the region of the embossing zones, without requiring a complex adjustment is required. Surprisingly, the wear of the spacer rings 14 respectively. 14 ' the wear of the as a bridge 3 trained engraving largely corresponds, can be achieved by arranging such spacers 14 respectively. 14 ' maintained over a long period of time, this forced setting of the embossing pressure and the embossing gap. This essentially serves to facilitate and reproduce the embossing process.

In 10 a fourth embodiment of the embossing roller according to the invention is shown, wherein here an embossing roller pair is shown having an upper embossing roll 1 and a lower embossing roller 2 includes.

The upper embossing roller 1 is with one as webs 3 trained engraving provided, with these webs 3 as a continuous web line spirally over the roll surface of the upper embossing roll 1 extend. The uninterrupted footbridges 3 are at the in 10 shown embodiment at an angle α of 70 ° relative to the roll axis 5 aligned.

Furthermore, the cross-sectionally rectangular webs are 3 with radially outer and parallel to the axis 5 extending web sections 6 Mistake. Between adjacent footbridges 3 are each a plurality of radially inwardly facing recesses 7 available. The bridges 3 have in the embossing roll shown one from the roll core 4 radially outward dimension (height) of 0.2 mm, while the width of the recesses 7 1.5 mm. The dimensions of the webs 3 and the recesses 7 are above the roll surface of the embossing roll 1 unchanged.

In the 10 furthermore depicted lower embossing roller 2 used in embossing the tissue article along with the top embossing roller 1 cooperates, with the exception of the distance of the adjacent webs, previously also referred to as the width of the recess 7 is designated, the same structure as this above for the embossing roll 1 is described. In other words, thus are in the lower embossing roll 2 also footbridges 3 at an angle α of 70 ° relative to the roll axis 5 ' aligned, being between adjacent webs 3 each a plurality of radially inwardly facing recesses 7 available. Here, the width of the recesses 7 , which corresponds to the axial distance of adjacent bars, 2.85 mm.

In again 11 shown top view of the embossed tissue article has, the total with 9 designated embossed articles a variety of diamond-shaped embossed zones 10 on. This creates these internal embossing zones 10 in that radially outwardly jumping webs of both embossing rollers 1 respectively. 2 ( 10 ) form the actual embossing gap during the embossing process, these embossing zones 10 about the thickness of the embossed article 9 Seen exactly in the middle. Through this variety of rhombic embossing zones 10 are the two layers shown by way of example to form the tissue article 9 permanently connected.

Due to the fact that the distance from adjacent webs 3 the lower roller 2 is greater than the distance from adjacent lands 3 The upper roller, the number of across the width of the embossed tissue article can be 9 provided embossing zones 10 ( 11 ) compared to the first embodiment, as compared to the 3 and 4 can be seen.

Claims (19)

Embossing roll for the production of tissue articles, in particular for the production of paper tissues, hygiene articles, kitchen towels or napkins, wherein two engraved rollers are provided and each roller has on its surface at least one over the roller surface protruding and formed as webs engraving, characterized in that the one pair of embossing rollers forming engraved rolls ( 1 ; 2 ) are aligned in such a way that the common embossing of the layers forming the tissue article ( 11 . 12 ) required by the co-aligned radially outer web portions ( 6 ) of the rolls ( 1 ; 2 ) is formed such that each roller of the embossing roller pair ( 1 ; 2 ) an exactly identical engraving ( 3 . 6 ) or that each roller ( 1 ; 2 ) such engraving ( 3 . 6 ), which only in the axial distance of the webs ( 3 ) is different. Embossing roller according to claim 1, characterized in that the webs ( 3 ) on the roll surface of each roll ( 1 ; 2 ) are arranged spirally. Embossing roller according to one of claims 1 or 2, characterized in that each web ( 3 ) of a plurality of web elements ( 3 ' ) is formed, wherein successive web elements ( 3 ' ) by radially inwardly facing recesses ( 13 ) are separated from each other. Embossing roller according to one of the preceding claims, characterized in that two embossing rollers (16) provided with different engravings ( 1 . 2 ) form the embossing roll pair, the engravings being arranged as webs arranged on the roll surface ( 3 ) are formed, and that the axial distance of the on the surface of the one embossing roller ( 2 ) arranged webs ( 3 ) is greater than the axial distance of the on the surface of the other embossing roll ( 1 ) provided webs ( 3 ). Embossing roller according to claim 4, characterized in that the axial spacing of the webs ( 3 ) on the roll surface of the one embossing roll ( 2 ) by a factor of 1.5 to 2.5 is greater than the axial distance of the webs ( 3 ) of the surface of the other embossing roll ( 1 ). embossing roller according to one of the claims 1 to 3, characterized in that two with identical engravings provided embossing rollers the embossing roller pair form. Embossing roller according to one of the preceding claims, characterized in that each roller ( 1 ; 2 ) at least one extending over the circumference spacer ring ( 14 . 14 ' ), wherein the spacer ring ( 14 . 14 ' ) relative to the engraving ( 3 . 3 ' . 6 ) further radially outward and the at least two, on each roller ( 1 ; 2 ) provided spacers ( 14 ; 14 ' ) are arranged so that the spacer rings ( 14 . 14 ' ) when embossing. Embossing roller according to claim 7, characterized ge indicates that each spacer ring ( 14 . 14 ' ) relative to the engraving between 0.005 mm and 0.1 mm further radially outward. Embossing roller according to one of the preceding claims, characterized in that the web ( 3 ) formed engraving of each roller ( 1 ; 2 ) a plurality of radially outer and parallel to the axis extending web portions ( 6 ) owns. Embossing roller according to one of the preceding claims, characterized in that each web ( 3 ) has an axial width between 0.2 mm and 1.4 mm, preferably an axial width of 0.5 mm to 0.9 mm. Embossing roller according to one of the preceding claims, characterized in that the between adjacent webs ( 3 . 3 ' ) provided recess ( 7 ) has an axial dimension between 1.0 mm and 10.0 mm, in particular between 1.2 mm and 1.5 mm. Embossing roller according to one of the preceding claims, characterized in that the radial height of each web ( 3 . 3 ' ) varies between 0.1 mm and 1.5 mm. Embossing roller according to one of the preceding claims, characterized in that the roller surface of each roller ( 1 ; 2 ) provided spiral webs ( 3 ) at an angle α between 35 ° and less than 90 °, relative to the roll axis ( 5 . 5 ' ) are aligned. Embossing roll according to one of the preceding claims, characterized in that the web ( 3 . 3 ' ) has a rectangular cross-section. Embossing roller according to one of the preceding claims, characterized in that at least one roller ( 2 ) of the roller pair ( 1 ; 2 ) at least one section ( 8th ), in which the roll surface is not engraved, this section ( 8th ) according to a predetermined pattern between the plurality of webs ( 3 . 3 ' ) is arranged. Embossing roller according to claim 16, characterized in that the un engraved section ( 8th ) accounts for between 20% and 70% of the roll surface of the respective roll. Embossing roller according to one of the preceding claims, characterized in that the rollers ( 1 ; 2 ) have a roll diameter between 100 mm and 1000 mm, preferably between 200 mm to 500 mm. Embossing roll according to one of the preceding claims, characterized in that on the roll surface such an engraving ( 3 . 3 ' ) It is provided that the thus produced he stamped zone an area between 0.1% and 60%, based on the surface of the embossed tissue article occupies. Embossing roll according to one of the preceding claims, characterized in that on the roll surface such an engraving ( 3 . 3 ' ) is provided that the number of embossing zones ( 10 ) between 5 and 90, based on 1 cm ² surface of the embossed tissue article ( 9 ), varies.