DE10043989A1 - Embossing rolls for making tissue articles, two such rolls, each with engraved surfaces, forming embossing roll pair - Google Patents

Abstract

The rolls (1, 2) form a pair. each roll has an engraving (3, 6), on the surface, projecting beyond the roll surface. The rolls are aligned with each other so that the embossing gap forming the place for the common embossing of the tissue articles (9) is formed by the aligned radial external engraving sectors of the rolls.

Description

The present invention relates to an embossing roller Provision of tissue articles with the characteristics of the upper handles of claim 1.

For tissue articles, especially paper tissues, Kü towels, toilet paper, napkins, place mats, hy gienetücher, or the like. The at least two, as a rule interconnected layers of a cellulosic material comprise, manufacture, it is known which the tissue article forming at least two layers by embossing using a embossing roller pair arranged in a calender with each other connect to.

For example, DE 196 26 997 describes such a device Embossing process for the production of a multi-layer tissue  article, whereby the layers to be connected to each other first arranged one above the other and then by means of a Embossing roller pair are so embossed that by a me Chanic deformation in the area caused by the engraving embossing the cohesion of the tissue article Layers is brought about. That with the known method used embossing roller pair looks after a given engraved roller, while the related Counter roller, which together with the engraved roller, the embossing roller pair is a non-engraved roller.

To be sure in the prior art set forth above make sure that the relevant embossing surfaces or points seen across the cross-section of the embossed tissue article Be arranged in the middle, requires the known Ver drive special engravings immediately after embossing about the liability caused by the engraving the embossing surfaces or the embossing points inside the ge embossed tissue articles.

In the known method and the pre used for this gewalzenpaar there is a risk that the Ver storage of the embossing points or embossing surfaces inside the Tissue item liability not required time, which is in the range of fractions of a second, is finished. This then leads to the tissue article with a relatively large force from the engraved embossing roller must be pulled, it is then very easy to egg tearing of the embossed tissue article, possibly connected with  an undesirable winding of the remaining web of the Tissue items come on one of the rollers of the pair of rollers can. Therefore, the known method must always be used Production disruptions can be expected.

The present invention has for its object a Embossing roller for the production of tissue articles, in particular for the production of paper handkerchiefs, kitchen towels, hy items, napkins, toilet paper and / or space doilies of the type mentioned above len, which contributes to a reproducible embossing of the tissue articles effective avoidance of production interruptions.

This object is achieved by an embossing roller the characterizing features of claim 1 solved.

The embossing roller according to the invention for the production of tissue articles, in particular for the production of hygiene articles, Handkerchiefs, kitchen towels, toilet paper, cosmos cloths, napkins and / or place mats, provides that two engraved rollers, one pair of embossing rollers form. Every roller is on its surface with at least provide an engraving protruding over the surface of the roller, the rollers being so during the manufacture of the tissue Articles are aligned with each other so that the ge joint embossing of the layers forming the tissue article embossing gap due to the radial alignment outer engraving sections of the two rollers is formed. In other words, in the case of the invention  Embossing roller, the two engraved and arranged in pairs cooperating rollers includes, the embossing and the occurring deformation of the layers of the stacked Tissue item such that the embossing gap is exclusive due to the radially outer engraving aligned with one another cuts of the engraving provided on both rollers det. This means that each stamping point or each Embossing area, which is also referred to below as the embossing zone are drawn, aligned with each other and across the thickness of the embossed tissue article seen in the middle are.

The embossing roller according to the invention has a number of advantages len on. So it should first be pointed out that in comparison to the above-mentioned prior art at the inventor embossing roller according to the invention no specially designed and sticky embossing zones are to be provided, because by the previously be wrote special alignment of the engravings of both Inevitably, rolling the layers of tissue relative to each other item both from the surface and from the surface che in the same places internally with the formation of the Embossing zones are deformed, which has the consequence that the Forces that are required to hold the embossed tissue article to be removed from each roller, are the same size, each but are directed in the opposite direction, so that these forces cancel each other out. This in turn leads to the fact that embossing roller according to the invention the unwanted winding of the embossed tissue article on a roller of the roller pair inevitably and thus particularly easily prevented  that disruptions and interruptions in production, so at for example tearing the embossed tissue article and / or unwanted winding of the embossed tissue item on one of the two engraved rollers, prevented becomes.

In addition, the embossing roller according to the invention still has the Advantage that both embossing rollers, which are preferably identical are engraved, wear particularly evenly, especially is not particularly the case if, as at the beginning ge called prior art, an engraved roller with a not engraved roller the necessary for the embossing Form the embossing gap. Furthermore, it was surprisingly fixed are that such, over identically shaped and from the surface and the bottom surface of the embossed Tissue articles embossing zones pointing inwards, which, as be is already described above, about the thickness of the embossed Ten tissue articles seen predominantly and preferably from are finally arranged in the central area excellent solid connection of the individual layers of the tissue cause items, so that these layers also permanently later use about such a special deformation are interconnected even if the layers are not closed are still glued together. This leads to in which using the embossing roller according to the invention manufactured tissue articles a partial or full detachment of individual layers or layers themselves extreme conditions of use are not observed could. Furthermore, with the embossing according to the invention  Roll-made tissue articles both on their surface as well as identical properties on its lower surface, because these two surfaces due to the special arrangement of the Embossing zones are deformed identically, so that the surface surface of such an embossed article with regard to their properties, in particular with regard to the Smoothness, grip, softness, absorbency and / or the strength, no difference, provided for the upper and lower layer of identical material is used. All in all thus contributes to the embossing roller according to the invention for simplification the production and to improve the properties of the hereby embossed tissue articles.

Basically, the embossing roller according to the invention, which for Embossing is used as an engraved pair of embossing rollers, have such an engraving over the surface of the roller each protrudes and so on the engraving of the others Roll is aligned that only the radially outer embossing Ren engraving sections with the formation of the embossing gap Design embossing zones. Particularly advantageous, in particular also from the point of view of the manufacturing cost of it embossing roller according to the invention, it is when each roller has a sol che engraving that has a variety of on the reels surface arranged webs includes. Leave such bars themselves under relatively favorable conditions through the Manufacture usual engraving techniques, being a further before It is to be emphasized in part of such web-like engravings that the wear of these web-like engravings compared to the specially shaped engravings of the prior art  is significantly reduced.

In a further embodiment of the embossing according to the invention rollers are the webs on the roller surface of each Roll-formed engravings arranged spirally, whereby such spirally extending webs diamond-shaped embossing effect zones in the embossed tissue article. Such Design of spiral webs on the top of the roller surface of each roller has the crucial additional Advantage that the wear on the engraving is minimized and ins special also that an adjustment of the engravings the first roller relative to the second roller of the embossing roller couple is minimized in terms of effort.

Basically, there is the possibility that the webs, which are arranged on the roller surface of each embossing roller net and are spiraling over the roller surface extend as a linear and thus continuous webs be designed. A particularly suitable and advantageous adhesive development of the embossing roller according to the invention before that, however, the webs from a variety of Web elements are formed, successive Web elements thanks to recesses pointing radially inwards are separated from each other. Such a configuration of the Embossing roller according to the invention can be relatively inexpensive produce and allows the formation of relatively small areas embossing zones, so that the density and size of the embossing zones the handle and especially the softness of the embossed tissue article in an undesirable manner  is made, but nevertheless ensures that those so embossed Layers due to the large number of embossing zones with a very small area are permanently connected.

Basically exist in the embossing roller according to the invention two ways how the engravings on the surface of the two embossing rollers, which form the embossing roller pair are to be designed in part.

So the first possibility provides that both embossing rollers have different engravings, these engravings ren, on the roller surface of each inventive Moderate embossing roller are provided, preferably from the previously described webs are formed. Here is the axial Distance from adjacent webs on the surface of the an embossing roller arranged webs larger than the axial Ab was from the neighboring webs on the surface of the the embossing roller provided webs, which has the consequence that the density and / or the size of the embossing zones of the one such embossing roller pair embossed tissue article modifi adorned and in particular can be reduced. By a axial displacement of one embossing roller relative to the other Embossing roller of the pair of embossing rollers can then additionally the density and / or the dimension in that with such Embossing roller pair of embossed tissue articles on the respective Requirements can be varied, making versatility easier ner such embodiment of the embossing according to the invention roller is enlarged.  

It is particularly advantageous in the case of the previously described design of the embossing roller if the axial distance from be neighboring webs on the roller surface of one embossing roll is 1.5 to 2.5 times larger than the axial Ab the neighboring bridges stood on the surface of the others Embossing roller, so that the radially outer engraving sections of the Embossing rollers only partially under during the embossing process Design according to small-scale embossing zones others are cursing. Such a reduced number in particular of small-area stamping zones then causes an increase in Absorbency and a very pleasing softness of the embossed Tissue articles.

In the second possibility, each of the two has fiction according to embossing rollers that form the pair of embossing rollers their surface has an identical engraving, so that here the embossing gap required for the embossing through the full Area of the radially outer engraving aligned with one another cuts of the embossing rollers is formed. With such a gene embodiment of the embossing roller according to the invention in particular those tissue articles are produced in which the layers to be joined together are particularly durable and durable should be connected with each other.

Another, particularly advantageous embodiment the embossing roller according to the invention uses such a whale pair in which each embossing roller has at least one has circumferentially extending spacer ring, the Spacer ring further radially outwards relative to the engraving  has. Here, these two, the pair of rollers, are made forming embossing rollers arranged during the embossing process net that the spacer rings that are outside of the emboss the article are arranged while touching, whereby over the radially outward dimension of the dis dance ring inevitably relative to the radial height of the engraving the thickness of the embossing gap is determined. Especially then if at each embossing roller at least at each axial end at least one spacer ring is provided, does not apply to one of the well-designed pair of embossing rollers during the embossing process the complex adjustment and setting of the embossing gap tes, because the embossing gap through the touching during embossing Spacer rings is forcibly formed. Surprisingly it was shown that the wear on the engraving was almost corresponds to the wear of the spacer rings, so that also an extremely long period of use the dimension of the pre split remains constant and thus with this execution form of the embossing roller according to the invention over a long loading period of use brought about an even imprint becomes.

Basically, the radially outward white Send dimension of the spacer ring relative to the engraving after Thickness and the number of layers to be embossed together the tissue article and the desired positioning of the Position of the embossing zones, relative to the thickness of the embossed tissue article.

In the previously described embodiment, the radial  outward facing dimensions of each embossing roller seen spacer ring designed identically, so are the embossing zones created by the engraving over the thickness of the embossed tissue article seen exactly in the middle. Wei However, the end of each of the embossing rollers seen spacer rings a smaller radially outward ge aligned dimension than that at the other end, the Distance rings forming the embossing roller forming a pair of rollers, so shifts relative to the thickness of the embossed tissue the position of the embossing zones from the center in Direction towards the embossing roller, the spacer rings of which are one size radially outward distance. This will it is possible to selectively also properties of the surface or to change the bottom surface of the embossed tissue article, so especially their softness, grip and absorbency and / or their strength.

If the embossing roller according to the invention for embossing two to eight-layer tissue articles used, so this has ge shows that preferably each spacer ring relative to the engraving by 0.2% to 10%, based on the radially outward facing Dimension of the engraving, pointing further radially outwards. In particular the spacer rings have such a radial after external dimension, which further 0.005 mm to 0.1 mm faces outside than that provided on the embossing roller surface Engraving. Tissue articles produced in this way are outstanding outstanding properties, especially excellent Wet and / or dry strength.  

Basically there is in the embossing roller according to the invention the possibility of the cross section of the engraving To design webs or web elements as desired, however rectangular or trapezoidal cross sections of the Web or the web elements are preferred. Here points then the engraving of each roller, designed as a web Large number of radially outer and parallel to the axis the web section, the web being embossed cuts the one roller relative to the web sections of the other roller are aligned so that they Web sections then with the formation of the embossing gap others are cursing and so when embossing the tissue item he desired internal embossing zones.

Such designs have high wear resistance men of the embossing roller according to the invention, in which each Web an axial width between 0.2 mm and 1.4 mm, preferably has an axial width of 0.5 mm to 0.9 mm. In this case, webs of this type in particular allow production of such internal embossing zones, which with a lot layered tissue articles a particularly permanent fixation of the individual layers guaranteed with each other.

Especially when the embossing roller according to the invention between ne adjacent webs has such depressions, their axial dimensions between 1.0 mm and 10.0 mm, preferred varies between 1.2 mm and 1.5 mm, has one of the like embodiment excellent properties to Erzeu of sharply contoured internal embossing zones, because  these recesses with the dimensions given above not so quickly ver by abrasion of the layer material dirty.

Basically, the embossing according to the invention is directed roll the radial height of each web on the one hand according to the by embossing the number to be connected and the individual thickness the layers and on the other hand according to the thickness of each constituting tissue article, the radial heights of each the webs preferably vary between 0.1 mm and 1.5 mm.

As previously in an embodiment of the fiction As described embossing roller, this includes preferred Design of the embossing roller as a spiral webs designed engraving, these spiral webs then in particular at an angle α between 35 ° and less than 90 ° and preferably between 45 ° and 85 °, relative to Roll axis are aligned. Here has been surprising shown that such, aligned obliquely to the roller axis Bridges have high wear resistance, which leads to this is to be attributed that every point of the web during loading drive time of the embossing rollers is evenly worn.

As stated above, one is preferred Design of the embossing roller according to the invention each web as Cross-section of a rectangular web. This right angular design of the web ensures that on the one hand the radially outer web section is sufficiently large embossed embossing zones and, on the other hand, a high ver  wear resistance of the engraving is given.

Should such tissue with the embossing roller according to the invention articles are manufactured in which only selected areas che have the embossing zones, so there is an embodiment the embossing roller according to the invention for use in which we at least one roller of the pair of rollers at least one section in which the roller surface with no engraving is provided. This is at least one section behind a predetermined pattern between the outward facing Engraving and especially between the multitude of webs ordered so that when embossing using one of the embossing roller does not cover the entire area of the tissue article with embossing zones but only selected areas of the Tissue articles are provided with embossing zones, while others areas do not form the layers forming the tissue article are interconnected.

In particular, those previously described do not engrave Sections of the at least one embossing roller between 20% and 70% of the roll surface of the respective roll, whereby such an embodiment of the embossing roller according to the invention especially for the manufacture of napkins, hygiene tissues or handkerchiefs is used.

Preferably, a pre used pair of rollers, in which each embossing according to the invention roll a roll diameter between 100 mm and 1000 mm, preferably between 200 mm to 500 mm, the  like rolls are still relatively inexpensive to manufacture and in addition, an extremely long service life in production own tissue articles.

Regarding the density of the embossing roller according to the invention The intended engraving should be noted that this engraving density on the one hand after the desired fixation of the Layers forming tissue articles and on the other hand depending on the because of the use of the tissue article. Especially ge engravings are suitable for this, especially the ones before written webs or web elements, in which the resulting created embossing zones an area between 0.1% and 60%, preferably between 10% and 35%, based on the total Take the surface of the embossed tissue article.

In particular, if the embossing roller according to the invention is provided with such an engraving on its surface that the number of embossing zones produced thereby varies between 5 and 90, based on 1 cm ^{2 of the} surface of the embossed tissue article, tissue articles can be permanently solidified by embossing produce. In this embodiment of the embossing roller according to the invention, relatively small-area embossing points, preferably also between 20 and 70 embossing points per cm ² surface, are thus produced as internal embossing zones, as a result of which the plurality of these embossing points in particular also ensures mechanical hooking and hooking of the individual layers . This in turn leads to the fact that tissue articles embossed in this way have a high mechanical strength of the interconnected layers, so that tissue articles can thereby be produced which in particular also have the previously described, non-embossed sections.

It has already been described repeatedly that the inventions Embossing roller according to the invention in the manufacture of the tissue article is used as a pair of embossing rollers, each optionally Roller of the pair of rollers an exactly identical engraving or one has such an engraving that is only at an axial distance The webs differentiate between these two options are described standing.

Under tissue articles are within the scope of the present Be understood such articles in which at least two layers, especially two layers of paper, by a mecha African deformation of selected zones of the layers which are connected, where appropriate, these layers in addition can be glued.

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

The embossing roller according to the invention described above is explained in detail below using four exemplary embodiments in conjunction with the drawing. Here, the first embodiment with reference to FIGS. 1 to 4, the second embodiment with reference to FIGS. 5 to 8, the third From guide die with reference to FIG. 9 and the fourth execution form with reference to FIGS. 10 and described in detail 11, wherein in all Fig. 1-11 the same items are provided with the same reference numerals.

In detail show:

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

Fig. 2 is a development of the jacket of the lower roller shown in Fig. 1;

Fig. 3 is a detail in plan view of the embossed with the roller pair shown in Figure 1 article.

FIG. 4 is a sectional view along the line AB in FIG. 3;

Fig. 5 is a schematic side view of a second embodiment of an embossing roller;

Fig. 6 is a development of the shell of the embossing roller shown in Fig. 5;

FIG. 7 shows a detail of the article embossed with the roller shown in FIG. 5;

Fig. 8 is a sectional view taken along the line AB in Fig. 7;

Is a schematic side view of a third embodiment of the embossing roll, ready to 9 as a pair of rollers.

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

Figure 11 is a detail in plan view of the embossed with the roller pair shown in Figure 10 the article..;

In Fig. 1 a first embodiment of the embossing roller according to the invention is shown, here a pair of embossing rollers is shown which comprises an upper embossing roller 1 and a lower embossing roller 2 .

The upper embossing roller 1 is provided with an engraving designed as webs 3 , these webs 3 extending spirally as an uninterrupted web line over the roller surface of the upper embossing roller 1 . In the embodiment shown in FIG. 1, the continuous webs 3 are oriented at an angle α of 700 relative to the roller axis 5 .

Furthermore, the webs 3 , which are rectangular in cross section, are provided with radially outer web sections 6 which end parallel to the axis 5 . ZTaischen adjacent webs 3 are each a plurality of radially inwardly white recesses 7 available. In the embossing roll shown, the webs 3 have a dimension (height) of 0.2 mm pointing radially outward from the roll core 4 , while the width of the cutouts 7 is 1.5 mm. The dimensions of the webs 3 and the recesses 7 are unchanged over the roller surface of the embossing roller 1 .

The lower embossing roller 2 also shown in FIG. 1, which cooperates with the upper embossing roller 1 when embossing the tissue articles, has the same structure, with the exception of a playfully drawn section 8 , as described above for the embossing roller 1 . In other words, the webs 3 are thus in the lower embossing roller 2 is also at an angle α of 70 ° oriented relative to the roll axis 5 ', wherein gen 3 each having a plurality are present between adjacent Ste of radially inwardly facing recesses. 7

The section 8 shown by way of example in FIG. 1 has no web-like engravings and, accordingly, also no cutouts. Rather, the section 8 is formed in that the roller core 4 'is not engraved here.

As that shown in Fig. 2 Processing of the jacket of the lower embossing roller 2 it can be seen, are uniformly distributed over the periphery of two non-embossed sections 8 and 8 'are provided, so that in these sections 8 and 8' at a embossing of the Production of the tissue article required and to be embossed layers these layers are not embossed together in these sections 8 and 8 '. Therefore there are no internal embossing zones in the embossed tissue article in the sections 8 and 8 ', so that the tissue article is particularly voluminous and soft over a relatively large area in the desired manner.

This is also clearly shown in FIGS . 3 and 4, which each depict the embossed tissue article on the one hand in the top view ( FIG. 3) and on the other hand in the sectional view ( FIG. 4).

As can be seen in FIGS . 3 and 4, the embossed article, designated as a whole by 9 , has a multiplicity of diamond-shaped embossing zones 10 , which are present outside the non-embossed section 8 . This in these lying embossing zones arise from the fact that radially outwardly projecting webs of both embossing rollers 1 and 2 ( FIG. 1) form the actual embossing gap during the embossing process, these embossing zones 10 being seen exactly in the middle over the thickness of the embossed article 9 are arranged, as can be seen clearly from FIG. 4. Due to this large number of diamond-shaped embossing zones 10 , the two layers 11 and 12 shown by way of example are permanently connected to one another to form the tissue arti 9 .

In FIGS. 5 through 8, the second exporting hereinafter approximate shape of an embossing roll described in more detail.

This second embodiment of the embossing roller is shown schematically in FIG. 5, whereas in contrast to FIG. 1 FIG. 5 only shows the lower embossing roller 2 . This lower embossing roller 2 and an interacting upper embossing roller, which is not shown, has a large number of web elements 3 'on its surface, of which three web elements 3 ' are shown by way of example in FIG. 5. In this case, a plurality of radially inwardly facing recesses 7 are present between adjacent web elements, these recesses extending up to the roller core 4 of the roller 2 inwards. Furthermore, successive ridge elements are 3 'by further, radially inwardly facing Ausspa stanchions 13 separated from each other, wherein these further, radially inwardly facing recesses 13 also to Wal zenkern 4-rich. This further, radially inwardly extending recesses 13 ensures that the number of embossing zones are reduced in comparison to the number of embossing zones of the first embodiment shown in FIGS . 1 to 4.

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

The lower embossing roller 2 shown in FIG. 5 is used for embossing the tissue article together with an upper embossing roller (not shown), as is formed in principle in FIG. 1 and is also explained there. In contrast to the embodiment shown there the upper embossing roller 1, the cooperating with the shown in Fig. 5 bottom embossing roller 2 upper embossing roller over its entire embossing roll shell evenly distributed web members 3 ', with successive web members 3' by further recesses 13 and adjacent web members 3 ' are interrupted by the recess 7 , so that the upper embossing roller is engraved accordingly, as shown in Fig. 5 for the engraved zones of the lower embossing roller 2 .

As the handling of the embossing roll shell of the lower embossing roller 2 according to Fig. Refer 6, the lower pre gewalze 2 two non-engraved sections 8 and 8 ', as in the other above for the first embodiment with reference to FIG. 2 was explained.

FIGS. 7 and 8 form a plan view of the embossed tissue products (Fig. 7) and a sectional view of the embossed tissue article (Fig. 8).

As can be seen from FIGS . 7 and 8, the embossed article, designated as a whole by 9, has a multiplicity of diamond-shaped embossing zones 10 , which are provided outside the non-embossed section 8 . This in these lying embossing zones 10 arise from the fact that radially outward-jumping webs of both embossing rollers form the actual embossing gap during the embossing process, these embossing zones 10 being arranged exactly in the middle over the thickness of the embossed article 9 , as is clearly the case Fig. 8 can be seen. Due to this large number of diamond-shaped embossing zones 10 , the two layers 11 and 12 shown as examples are permanently connected to one another to form the tissue article 9 .

In contrast to the tissue article embossed with the first embodiment of the embossing roller shown in FIG. 1, the embossing articles embossed in FIG. 7 with the embossing roller shown in FIG. 5 have embossing zones 10 , the spacing and density of which are substantially smaller than the distance and Density of the embossing zones 10 generated with the first embodiment, as can be seen from the comparison of FIGS. 3 and 7. This is due to the fact that in the second embodiment, the embossing rollers ( FIG. 5) have further, radially inward recesses 13 between each of the web elements 7 , so that the density of the embossing zones in the longitudinal direction of the embossed article is reduced accordingly.

The third embodiment of the embossing rollers 1 and 2 depicted in FIG. 9 corresponds exactly in its engraving to the embossing roller pair, as was explained above in connection with FIG. 1. In addition, however, the embossing roller pair 1 or 2 according to FIG. 9 has spacer rings 14 or 14 ', each embossing roller 1 or 2 having a spacer ring 14 or 14 ' at the end.

As can be clearly seen from Fig. 9, the spacer rings 14 and 14 'relative to the webs 3 around the loading h, which makes 0.015 mm in the embodiment shown, further radially outward. The axial dimension d of these spacer rings 14 and 14 'is 50 mm.

This spacer rings 14 and 14 'cause that the engravings 3 of the upper roller 1 and the lower roller 2 are kept at a distance during the embossing process for the manufacture of the tissue article, so that automatically a desired embossing pressure and a desired embossing gap dimension in the area of the embossing zones without the need for complex adjustments. Since, surprisingly, the wear of the spacer rings 14 and 14 'corresponds largely to the use of the engraving designed as a web 3 , arrangement of such spacer rings 14 and 14 ' over a long period of time allows this forced setting of the embossing pressure and the embossing gap to be maintained. This essentially facilitates and reproducible speed of the embossing process.

In Fig. 10, a fourth embodiment of the embossing roller according to the invention is shown, here a pair of embossing rollers is shown which comprises an upper embossing roller 1 and a lower embossing roller 2 .

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

Furthermore, the webs 3 , which are rectangular in cross section, are provided with radially outer web sections 6 which end parallel to the axis 5 . A plurality of radially inward white recesses 7 are present between adjacent webs 3 . In the embossing roll shown, the webs 3 have a dimension (height) of 0.2 mm pointing radially outward from the roll core 4 , while the width of the cutouts 7 is 1.5 mm. The dimensions of the webs 3 and the recesses 7 are unchanged over the roller surface of the embossing roller 1 .

The lower embossing roller 2 also shown in FIG. 10, which cooperates with the upper embossing roller 1 when embossing the tissue articles, has the same structure, with the exception of the distance between the adjacent webs, which was previously also referred to as the width of the recess 7 , as described before standing for the embossing roller 1 . In other words, in the lower embossing roll 2 , webs 3 are also aligned at an angle α of 70 ° relative to the roll axis 5 ', with a plurality of radially inwardly facing recesses 7 being provided between adjacent webs 3 . Here, the width of the recesses 7 , which speaks to the axial distance from adjacent webs, is 2.85 mm.

As can be seen from the top view of the embossed tissue article shown in FIG. 11, the embossed article, denoted overall by 9, has a multiplicity of diamond-shaped embossing zones 10 . Here, these internal embossing zones 10 arise in that radially outwardly projecting webs of both embossing rollers 1 and 2 ( FIG. 10) form the actual embossing gap during the embossing process, these embossing zones 10 being seen exactly in the thickness of the embossed article 9 Are arranged in the middle. Due to this large number of diamond-shaped embossing zones 10 , the two layers shown by way of example are permanently connected to one another to form the tissue article 9 .

Due to the fact that the distance from adjacent webs 3 of the lower roller 2 is greater than the distance from neighboring th webs 3 of the upper roller, the number of provided over the width of the embossed tissue article 9 embossing zones 10 ( Fig. 11) in Reduce comparison to the first embodiment, as can be seen in the comparison of FIGS. 3 and 4.

Claims (20)

1. embossing roller for the production of tissue articles, in particular for the production of paper tissues, hygiene articles, kitchen towels or serviettes, characterized in that two engraved rollers ( 1 ; 2 ) each form an embossing roller pair, each roller ( 1 ; 2 ) Their upper surface has at least one engraving ( 3 , 6 ) projecting over the roller surface, and that the rollers ( 1 ; 2 ) are aligned with one another in such a way that the layers ( 11 , 11 ) forming the tissue article ( 9 ) 12 ) required embossing gap is formed by the radially outer engraving sections ( 6 ) of the rollers ( 1 ; 2 ) aligned with one another. 2. embossing roller according to claim 1, characterized in that each roller has such an engraving ( 3 , 6 ), which summarizes a lot of arranged on the roller surface webs ( 3 ). 3. embossing roller according to claim 2, characterized in that the webs ( 3 ) on the roller surface of each roller ( 1 ; 2 ) are arranged spirally. 4. embossing roller according to one of claims 2 or 3, characterized in that each web ( 3 ) from a plurality of web elements ( 3 ') is formed, successive web elements ( 3 ') by radially inward recesses gene ( 13th ) are separated from each other. 5. embossing roller according to one of the preceding claims, characterized in that two, with different engravings ver embossing rollers ( 1 , 2 ) form the embossing roller pair, where the engravings are designed as webs ( 3 ) arranged on the roller surface, and that the axial Distance ( 7 ) of the webs ( 3 ) arranged on the surface of the one embossing roller ( 2 ) is greater than the axial distance ( 7 ) of the webs ( 3 ) provided on the surface of the other embossing roller ( 1 ). 6. embossing roller according to claim 5, characterized in that the axial distance ( 7 ) of the webs ( 3 ) on the roller surface of the embossing roller ( 2 ) by a factor of 1.5 to 2.5 is greater than the axial distance ( 7 ) the webs ( 3 ) of the surface of the other embossing roller ( 1 ). 7. embossing roller according to one of claims 1 to 4, characterized ge indicates that two have identical engravings  Embossing rollers form the pair of embossing rollers. 8. embossing roller according to one of the preceding claims, characterized in that each roller ( 1 ; 2 ) has at least one spacer ring ( 14 , 14 ') extending over the circumference, the spacer ring ( 14 , 14 ') relative to the engraving ( 3rd , 3 ', 6 ) further radially outwards and the at least two spacer rings ( 14 ; 14 ') provided on each roller ( 1 ; 2 ) are arranged in such a way that the spacer rings ( 14 , 14 ') are suitable for embossing touch. 9. embossing roller according to claim 8, characterized in that each spacer ring ( 14 , 14 ') relative to the engraving between 0.005 mm and 0.1 mm further radially outwards. 10. embossing roller according to one of the preceding claims, characterized in that the as a web ( 3 ) formed Gra vur each roller ( 1 ; 2 ) has a plurality of radially outer and parallel to the axis web sections ( 6 ) be sitting. 11. 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. 12. Embossing roller according to one of the preceding claims, characterized in that the recess ( 7 ) provided between adjacent webs ( 3 , 3 ') has an axial dimension between 1.0 mm and 10.0 mm, in particular between 1.2 mm and 1.5 mm. 13. 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. 14. Embossing roller according to one of the preceding claims, characterized in that the spiral webs ( 3 ) provided on the roller surface of each roller ( 1 ; 2 ) are at an angle α between 35 ° and less than 90 °, relative to the roller axis ( 5 , 5 '), are aligned. 15. embossing roller according to one of the preceding claims, characterized in that the web ( 3 , 3 ') has a rectangular cross section. 16. Embossing roller according to one of the preceding claims, characterized in that at least one roller ( 2 ) of the pair of rollers ( 1 ; 2 ) has at least one section ( 8 ) in which the roller surface is not provided with an engraving, this section ( 8 ) according to a predetermined pattern between the plurality of webs ( 3 , 3 ') are arranged. 17. embossing roller according to claim 16, characterized in that the non-engraved section ( 8 ) make up between 20% and 70% of the roller surface of the respective roller. 18. embossing roller according to one of the preceding claims, characterized in that the rollers ( 1 ; 2 ) have a roller diameter between 100 mm and 1000 mm, preferably between 200 mm to 500 mm. 19. Embossing roller according to one of the preceding claims, characterized in that one of the type of engraving ( 3 , 3 ') is provided on the roller surface that the he created embossing zones an area between 0.1% and 60%, based on conditions the surface of the embossed tissue article. 20. Embossing roller according to one of the preceding claims, characterized in that one of the type of engraving ( 3 , 3 ') is provided on the roller surface, that the number of embossing zones ( 10 ) thus produced is between 5 and 90, based on 1 cm ^{2 The} surface of the embossed tissue article ( 9 ) varies.