EP0802026A1 - Perforating appparatus for foils, especially plastic foils - Google Patents

Abstract

A device for perforating webs of foil, in particular plastic foil, has at least one pair of rollers through which the foil is moved. The pair of rollers includes a spiked roller with spikes which extend radially from its outer surface, and a mating roller held against the spiked roller and whose outer surface has a lining which can be penetrated by the point of each spike, for example an elastic outer ply. The outer surface of the spiked roller has at least one recess in which a spike is arranged in such a way that only a section of its point protrudes by a predetermined extent beyond the outer surface.

Description

The invention relates to a device for perforating sheet-like foils, in particular plastic foils.

Plastic films used for the production of packaging, such as sacks or bags, should be permeable to air, at least in some areas, if bulk goods such as dusts, flours and granules are packed in them so that, for example, the enclosed air can escape during filling. Enclosed air cushions can otherwise lead to stacking difficulties when the filled packaging is stacked and stored, or even the sacks and bags to burst open.

It is known to produce air-permeable areas by roughly piercing, punching or slitting the foils. Since the foils are obtained as a web-shaped raw material that is fed continuously, that is to say endlessly, to a production plant for packaging, a perforating station must also be able to pass continuously Perforate foils. Due to the passage, in conjunction with the conveying speed of the films, holes are more or less widened when the films are pierced with conventional tools, which ensure that trapped air can escape in the packaging produced, but also undesirably fill material. Another disadvantage of the resulting, relatively large-sized piercings is the fact that foreign substances can penetrate into the packaging from the outside, as a result of which the contents in the packaging become dirty and can even become unusable. In order to avoid this, it is customary to cover the perforated areas with filter material in a technically complex and costly manner.

The invention has for its object to provide a device with which foils can be perforated so finely that they become air-permeable, but no filling material escapes or foreign matter cannot penetrate the foils.

This object is achieved according to the invention by at least one pair of rollers traversed by the film, consisting of a needle roller which has needles oriented radially to its outer surface and a counter roller which is held in contact with the needle roller, and the outer surface of which by immersing a tip respective needle enabling equipment is provided. The counter roller can be designed to run along, but can also be easily equipped with an associated drive.

Films can be perforated very finely with the device according to the invention, since the needles of the needle roller are so are arranged so that they can only penetrate with their tip into the correspondingly equipped outer surface of the counter roller as soon as they are pierced through the film to be perforated. The equipment preferably includes a resilient design of the outer surface. However, the equipment can also comprise grooves or the like depressions correspondingly molded into the lateral surface, into which a tip of a needle emerging from the pierced film can protrude. Since the counter roller and the needle roller are held in mutual contact during the passage of a film to be perforated, deformation and tearing of the puncture when penetrating the needle is prevented because the resulting warping of the punctured film, which occurs particularly in the frame area of the puncture, is practical were rolled smooth or cannot occur at all. Tears that occur when the needle is replaced are also prevented.

For perforating films, at least one needle roller with an associated counter roller, which form a pair of rollers, is required. However, it is also possible to hold several needle rollers in contact with one counter roller. Rotation bodies can be assembled from both counter rollers and needle rollers, which form needle rollers or counter rollers. It is particularly expedient if each needle roller remains individually and separately stored within a needle roller. However, a counter roller can be formed in one piece, in which case a plurality of needle rollers or needle rollers can then rest on this counter roller.

The dimensioning of a puncture through the film depends essentially on the dimension of the piercing needle. The minimization of the diameter of a needle stands counter that the needle becomes more sensitive to mechanical loads with decreasing needle diameter. The goal of using the smallest possible needle diameter should therefore hardly be achievable by reducing the size of the needles inserted in the needle rollers.

Mikroperforation" ergibt, ohne Bruchgefahr für die Nadeln dadurch erreicht, daß die Mantelfläche der Nadelrolle Vertiefungen aufweist, zum Beispiel Bohrungen. In jeder Vertiefung ist eine Nadel der Art aufgenommen, daß nur noch ein Abschnitt ihrer Spitze um vorbestimmtes Maß über die Mantelfläche vorsteht. Ein solches Maß ist mit Vorteil etwa gleich dem Vierfachen der Dicke der Folie, wodurch weitgehend runde Löcher mit glatten Rändern in der Folie entstehen. Vorzugsweise, nämlich um gewisse Standardisierung zu erreichen, kann das Maß gleich dem Verhältnis von Foliendicke zu Überstand von etwa 1 : 3,33 bis 1 : 4,66 betragen, wodurch auch Anpassungen der Lochungen der Folie an das mit der gelochten Folie zu verpackende Füllgut möglich sind.In the device according to the invention, the desired small-sized piercing of foils, the so-called

Microperforation "results, without risk of breakage for the needles, in that the outer surface of the needle roller has depressions, for example bores. In each recess, a needle is accommodated in such a way that only a portion of its tip protrudes by a predetermined amount over the outer surface such a measure is advantageously approximately four times the thickness of the film, which largely results in round holes with smooth edges in the film, preferably, to achieve a certain standardization, the measure can be equal to the ratio of film thickness to projection of approximately 1: 3 , 33 to 1: 4.66, which also makes it possible to adapt the perforations in the film to the contents to be packed with the perforated film.

The tip angle of each needle tip should not be greater than 25 °, so that the needle tip remains fine enough on the one hand, but on the other hand does not become too sensitive to mechanical loads. A tip angle of 15 ° to 20 ° has proven to be advantageous.

Relatively strong needles can be inserted into the recesses of the needle roller, with only the tips of the needles protruding from the recesses by the desired amount. The conical shape of the needle tips in connection with the constant protrusion of the needles over the outer surface means that the perforation of the Plastic films with minimal diameters of the punctures is possible.

The needle roller can be equipped with depressions distributed over its surface, for example bores, without any problems. Each depression can be a blind hole into which the shaft of a needle can be inserted. The needles can be used with a press fit.

Means for setting and fixing the insertion depth of a needle can also be provided. Any means for setting and fixing a needle in the blind hole can, for example, be a spacer element which can be placed in the blind hole. The surfaces of the needle and spacer element which are in contact with one another in the blind hole can be equipped with locking means which can be brought into operative connection with one another.

However, it is also possible to use a hollow roller or hollow roller for each needle roller or needle roller and to let the needles with the foot region in the inner cavity of the roller or roller emerge with a protrusion or flush so that corresponding holding, Fastening and adjusting members can be attached, through which the protrusion of the needle tips can be adjusted beyond the outer surface of the roller or roller, and through which the set needles can then be determined and fixed in the appropriate position.

Each counter roller or counter roller is designed as a smooth roller or smooth roller. A smooth roll or smooth roller is advantageously able to roll warps in the edge area of the perforations of the film smoothly. This is made possible in particular by the fact that the lateral surfaces of the needle roller and counter roller are practically free from one another are held, whereby a not inconsiderable pressure is exerted on the continuous foil to be perforated. Such an advantageous pressure is achieved, for example, by equipment which is designed such that it consists entirely of a material into which the needles, which are pierced by a film, can penetrate. This is achieved, for example, with a hard elastic material. For this purpose, the outer surface of the counter roller or counter roller consists at least in sections of hard-elastic material. For example, hard rubber can be used. The hard elastic material can, for example, be in the form of a layer placed around the counter roller. The material used has a Shore hardness of 90, preferably 95. If the counter roller and the needle roller are placed against one another in such a way that their outer surfaces are in contact with one another, the needles projecting over the outer surface penetrate into the layer made of hard-elastic material. The plastic film to be punched, which is relatively thin, runs between the counter roller and the needle roller and is rolled, also by the elasticity of the outer surface of the counter roller, with a predeterminable rolling pressure.

Mikroperforation" vorteilhafte Anliegen der Rollen bzw. Walzen, und zwar das vorbeschriebene spielfreie Anliegen unter Druck, auch in konstruktiver Hinsicht gewährleistet ist, ist bei der Vorrichtung vorgesehen, daß wenigstens eine der Rollen des Rollenpaares, bzw. eine der Walzen eines Walzenpaares, in Lagern gelagert ist, die mit einer Stelleinrichtung zur Verstellung des Achsabstandes zwischen den Walzen des Walzenpaares ausgerüstet sind.So that for the invention

Microperforation "advantageous concerns of the rollers or rollers, namely the above-described backlash-free application under pressure, is also guaranteed in design terms, is provided in the device that at least one of the rollers of the pair of rollers, or one of the rollers of a pair of rollers, in bearings is mounted, which are equipped with an adjusting device for adjusting the center distance between the rollers of the pair of rollers.

The adjustment of the center distance can also be carried out cyclically with a suitable adjusting device can be controlled, for example to intermittently create a perforation in a film.

The adjusting device for the bearings is advantageously provided with pressure elements, for example spring elements, which make it possible to hold the rollers or rollers of the roller or roller pair resiliently but with appropriate pressure by the spring force. Working cylinders replacing the spring members can also be used as pressure members. A device for adjusting the pretension of the spring elements or for changing the pressurization of the working cylinders can be provided to adjust the system of the rollers or rollers and the system pressure.

For the perforation of films with the device according to the invention, it is furthermore particularly advantageous if deflection rollers are provided, which apply the film to the outer surface of the counter roller or the counter roller before and / or after it has passed through the pair of rollers or rollers.

When using rollers, parallelism deviations can occur, which are particularly noticeable with longer rollers. In order to perforate wider strips in a film, however, more or less long rollers are required, the length of which corresponds to the perforation width. In order to avoid the parallelism deviations that occur, it is provided in the invention that a plurality of needle rollers are staggered one behind the other in the direction of travel of the film, such that the working areas of adjacent needle rollers are directly adjacent to one another. The adjoining of the work areas ensures a full-surface perforation of the foils, with the individual storage of several needle rollers that work against each other are offset, leads to the reduction of harmful effects due to deflection and manufacturing tolerances. In particular, in order to avoid the deflection of a counter roller, it is expedient to arrange the needle rollers assigned to a common counter roller or counter roller offset by 180 ° to one another radially to the counter roller or counter roller. In particular, the not insignificant pressure of the needle rollers on the counter roller or counter roller is approximately compensated for, so that the risk of deflection of the counter roller or counter roller remains limited to a still tolerable minimum.

If the needle rollers are each offset by 180 °, but are arranged in the same circumferential area, the pressure forces which cause a risk of deflection are compensated for. In this case, however, both needle rollers perforate the same area of the film, which is not the case with needle rollers arranged offset in the longitudinal direction of the counter roller or counter roller.

If an already perforated area of the film is perforated again by the subsequent needle roller, this can have a disadvantageous effect on the perforation pattern. In order to avoid this, the needles of the corresponding needle rollers can be arranged in such a way that, for example, the needles of the first needle roller passed first only perforate such a film area that the needles arranged differently on the second needle roller passing thereafter do not reach. For example, the needles may be arranged in rows along the circumference of each needle roller, the rows of the second needle roller being laterally offset from the rows of the first needle roller.

The use of individual needle rollers, which are also stored individually, has the further advantage that each needle roller is pressed in a controlled manner, that is to say it can also be clocked, so that perforation fields can be generated in the longitudinal direction of the film. Likewise, the arrangement of individual needle rollers in the device makes it possible, by swiveling away predetermined needle rollers, to continuously hide perforations on the film in a stripe where perforation could lead to application difficulties for the films. It is also possible to combine the needle roller with storage in one structural unit, which advantageously enables the entire structural unit to be moved laterally. Lateral distances can be set so that work areas are precisely adjacent to one another or the areas of the perforations are defined.

In addition, in the case of needle or needle roller defects, only an inexpensive replacement of the defective needle roller is required.

When designing the device with individually mounted needle rollers, uniform pressure on the counter-pressure roller and the continuous film over the entire film width is possible, which advantageously leads to uniformly large holes in the perforation provided.

When the needles are removed from the perforated film, elongated holes can form. To avoid this, the diameters of the needle roller and counter roller or of the needle roller and counter roller are relatively small. For reasons of stability, the counter roller or counter roller is designed with a larger diameter than the needle roller or needle roller, for example with a diameter of 200 mm, which has proven to be expedient if the diameter of the The needle roller or the needle roller is not larger than, for example, 120 mm, but preferably not smaller than 80 mm. The passage of the film is so directed that it largely wraps around the counter roll or counter roll, for example with a wrap angle of 270 °.

Herstellrichtung".Films made from semi-crystalline materials, such as polyethylene, have a stronger orientation of the molecules in the direction of manufacture than at right angles to the direction of manufacture. This means that the film webs are more sensitive to tearing and tearing in the longitudinal direction

Manufacturing direction ".

As already mentioned, a predetermined number of needles is distributed in a row on a circumferential line of the needle roller or needle roller, wherein each needle roller or needle roller has several rows of needles next to one another. In order to reduce the tear and tear propagation sensitivity of the perforated film in the longitudinal direction (production direction), it is provided in the device according to the invention that the needles of adjacent circumferential lines or adjacent rows are offset from one another in the direction of rotation of the needle roller or the needle roller. This doubles the distance between the perforation holes in the film and thus the tear length.

For further enlargements of the hole spacing, it is expedient to align each circumferential line or row with needles offset at an angle to the axis of rotation or radial direction with a constant needle pattern and number of needles of the needle roller or needle roller. The offset angle of a circumferential line or row can, for example, be approximately 15 ° to the axis of rotation.

Another advantageous hole pattern of the perforation can also result from the fact that the needles are staggered alternately or alternately on both sides of the circumference, with a constant number of needles within a row or circumferential line, in particular in combination with the offset of the needles of adjacent rows or circumferential lines This creates a perforation pattern of the perforation that has little tendency to tear.

There is preferably about 8 mm between two adjacent needles in a row and about 4 mm between the rows. The amount of displacement, based on a circumferential line, is approximately 2 mm.

Fig. 1

eine schematische Seitenansicht eines Rollenpaares im Schnitt,

Fig. 2

eine Einzelheit der Nadelrolle des Rollenpaares gemäß Fig. 1 im Schnitt in vergrößertem Maßstab,

Fig. 3

eine schematische Seitenansicht einer Vorrichtung mit einer Gegenrolle und zwei daran angelegten Nadelrollen,

Fig. 4

eine schematische Seitenansicht eines Abschnitts einer Gegenwalze mit mehreren daran angelegten Nadelrollen,

Fig. 5

die schematische Seitenansicht eines Abschnitts einer Gegenwalze mit daran angelegten Nadelrollen, die versetzt zueinander angeordnet sind,

Fig. 6

eine schematische Ansicht eines Abschnitts einer Folie, die mit einer Vorrichtung entsprechend Fig. 4, erzeugte streifenförmige Perforierungen aufweist,

Fig. 7

einen Abschnitt einer Folie, der einen Perforationsbereich aufweist, welcher mit einer Vorrichtung entsprechend Fig. 5 hergestellt ist,

Fig. 8

eine schematische Seitenansicht einer Nadelwalze mit in Reihen angeordneten Nadeln,

Fig. 9

ein durch Einkreisung in Fig. 8 gekennzeichnetes, vergrößertes Detail zur Verdeutlichung der Nadelanordnung,

Fig. 10

eine schematische Seitenansicht einer Nadelrolle, deren Nadeln in Reihen angeordnet sind, die zur Rotationsachse um einen Winkel geneigt sind,

Fig. 11

eine durch Einkreisung in Fig. 10 gekennzeichnete Detailansicht in vergrößertem Maßstab und

Fig. 12

eine schematische Ansicht einer weiteren Möglichkeit der Nadelanordnung auf der Mantelfläche einer Nadelrolle.

Exemplary embodiments from which further inventive features result are shown in the drawing. Show it:

Fig. 1

a schematic side view of a pair of rollers in section,

Fig. 2

2 shows a detail of the needle roller of the roller pair according to FIG. 1 in section on an enlarged scale,

Fig. 3

2 shows a schematic side view of a device with a counter roller and two needle rollers placed thereon,

Fig. 4

FIG. 1 shows a schematic side view of a section of a counter roll with a plurality of needle rollers placed thereon,

Fig. 5

FIG. 2 shows a schematic side view of a section of a counter roll with needle rollers attached to it, which are staggered,

Fig. 6

3 shows a schematic view of a section of a film which has strip-shaped perforations produced with a device according to FIG. 4,

Fig. 7

a section of a film which has a perforation area which is produced with a device according to FIG. 5,

Fig. 8

2 shows a schematic side view of a needle roller with needles arranged in rows,

Fig. 9

8 shows an enlarged detail indicated by the encirclement in FIG. 8 to illustrate the needle arrangement,

Fig. 10

2 shows a schematic side view of a needle roller, the needles of which are arranged in rows which are inclined at an angle to the axis of rotation,

Fig. 11

a detailed view characterized by encirclement in Fig. 10 on an enlarged scale and

Fig. 12

is a schematic view of another possibility of the needle arrangement on the outer surface of a needle roller.

Fig. 1 shows a schematic side view of a film 1, which passes through a pair of rollers, which comprises a needle roller 2 and a counter roller 3. The outer surface 4 of the counter roller 3 consists of a layer of hard elastic material 5, for example hard rubber. The needle roller 2 has Wells 6, in each of which a needle 7 is received such that only a predetermined portion of the needle tip 8 protrudes beyond the lateral surface 9 of the needle roller 2. When the film 1 passes through the pair of rollers comprising the needle roller 2 and the counter roller 3, the film is pierced, which is illustrated by the perforations 10 drawn in the right section of the film.

Fig. 2 shows a detail of the needle roller 2 on an enlarged scale. The same components are labeled with the same reference numbers.

The needle 7 is inserted into the recess 6. The depression is drilled as a blind hole. The depression is expediently cylindrical, so that needles with a cylindrical shaft can be used. At the bottom of the recess 6 there is a spacer 11, the length of which allows the protrusion of the needle tip 8 from the lateral surface 9 of the needle roller 2 to be determined. The needle 7 is slotted in the foot area. A conical mandrel 12 of the spacer 11 can press into the slot, as a result of which the shaft of the needle 7 is expanded and the needle is firmly seated in the recess 6 of the needle roller 2.

3 shows the side view of a schematically reproduced device. The device comprises a machine frame 13 in which a counter roller 3 is rotatably mounted in a manner not shown, such that the counter roller 3 can rotate about the axis 14 when the film 1 runs in the direction of the arrows 15 over the counter roller 3. Deflection rollers 16, 16 'are provided which ensure that the film 1 wraps around the counter roller 3 as it passes through the device, as shown here.

Bearing cross members 18, 18 'are mounted on the machine frame in the spherical bearings 17, 17'. Working cylinders 19, 19 'are supported on the machine frame 13 and engage with their piston rods 20 on the bearing cross members 18, 18'. As a result, each bearing traverse can be pivoted with the aid of the working cylinders 19, 19 'independently of the other bearing traverse in each case about the associated pivot bearing 17 or 17'. The pivoting movement is indicated by the double arrows 21 and 21 '.

A needle roller 2 or 2 'is mounted on the free end of each bearing crossmember 18 or 18'. Fig. 3 illustrates that the two needle rollers 2, 2 'with the help of the working cylinder 19 and 19' are applied to the counter roller 3 with a predetermined pressure. The film 1 passing therebetween is perforated by means of the needle roller 2, 2 '.

Fig. 3 illustrates that the needle rollers 2 and 2 'are assigned to a common counter roller 3 and are positioned at 180 ° to each other radially to the counter roller. The pressing force of the needle roller 2, which it exerts on the counter roller 3, is thereby compensated for by means of the opposing pressing force of the needle roller 2. This is particularly advantageous in order to avoid deflections, which have particularly serious effects when a plurality of needle rollers simultaneously press on one side against a longer counter roller.

FIG. 4 shows a schematic view of a device in which a plurality of needle rollers 2, 2 ′ or 2 ″, 2 ″ ″ have a counter roller 3 in the form of a longer counter roller. Each needle roller 2, 2 'or 2'',2''' is, according to FIG. 3, stored separately and independently, and pressed against the counter roller 3. In the working area of the needle rollers, the counter roller is hard elastic Material 5 encased, with which the outer surface 4 of the counter roll 3 consists at least in sections of hard elastic material 5.

Fig. 4 illustrates that a deflection of the counter roller 3 could occur if only the needle rollers 2 and 2 '' located next to each other would be in contact with the counter roller 3 '.

The deflection due to the loads is significantly reduced by the needle rollers 2 'and 2' '' which are opposite the needle rollers 2, 2 '' and are spatially offset by 180 °.

Fig. 5 shows a schematic view of a counter roller 3 ', with the needle rollers 2' and 2 '' 'in such a way that their working areas adjoin each other.

4 leads to the formation of perforated strip areas on a film 1 in the direction of passage, with the design according to FIG. 5 a film can be perforated over a wide area.

Fig. 4a illustrates in an enlarged detail view sections through the lateral surfaces of the two needle rollers 2 and 2 'in Fig. 4, which are mutually offset by 180 ° and provide the formation of the strip-shaped perforation area 22 in the film 1 (Fig. 6).

4a indicates how the needle tips 8 of the needle roller 2 are laterally offset with respect to the needle tips 8 'of the needle roller 2'. Each needle roll therefore perforates a different row of holes in the film than the respective one opposite to the counter roller 3 'pressed needle roller.

6 and 7 show corresponding perforation areas in a film 1. The strip-shaped perforation areas are designated in FIG. 6 with 22 and 22 '. Unprocessed film areas are located on both sides of the strip-shaped perforation areas 22 and 22 '. For example, the film may have passed in the direction of arrow 15.

Fig. 8 shows a schematic side view of a needle roller 2, the outer surface 9 of which is equipped with needles. A predetermined number of needles is in each case distributed in series on a circumferential line of the needle roller 2, each needle roller having a plurality of rows of needles next to one another.

FIG. 9 shows the section marked by encirclement in FIG. 8 from the view of the lateral surface 9 of the needle roller 2 according to FIG. 8 on an enlarged scale. Fig. 9 shows that the needles 7 are arranged in rows. One of the rows is illustrated by arrow 23.

FIG. 10 shows a schematic side view of a needle roller 2 on the lateral surface 9 of which needles are also arranged in a row, although the rows are staggered at an angle to the axis of rotation 24 or radial direction of the needle roller.

FIG. 11 again shows the section of the circumferential surface designated by the encirclement in FIG. 10 on an enlarged scale and again shows by arrow 23 the angular displacement of the rows of needles 7 with respect to the axis of rotation 24 of the needle rollers.

FIG. 12 schematically shows another possibility of arranging needles on the outer surface 9 of a needle roller or needle roller. The needles 7 are alternately or alternately offset on both sides of the circumferential line 25 within a row or circumferential line 25, which is again illustrated by the arrow 23. In order to clarify this, the needles of a row are connected to one another by only lines 26 drawn in here.

Claims (39)

Device for perforating sheet-like foils, in particular plastic foils,
marked by
at least one pair of rollers traversed by the film (1), consisting of a needle roller (2) which has needles (7) aligned radially to its lateral surface (9) and a counter roller (3) which is in contact with the needle roller (2) is held, and the outer surface (4) of which is provided with an immersion of a tip (8) of a respective needle (7). Apparatus according to claim 1, characterized in that the outer surface (9) of the needle roller (2) has at least one recess (6) in which a needle (7) is received in such a way that only a portion of its tip (8) around a predetermined one Dimension protrudes beyond the lateral surface (9). Device according to claim 2, characterized in that each recess (6) is a blind hole into which the shaft of a needle (7) can be inserted. Device according to one of claims 1 to 3, characterized in that means for adjusting and fixing the insertion depth of a needle (7) are provided. Device according to Claim 4, characterized in that each means for setting and fixing a needle (7) is a spacer element (11) which can be placed in the recess (6). Apparatus according to claim 5, characterized in that the are in contact with each other in the recess (6) Surfaces of needle (7) and spacer element (11) are equipped with locking means that can be brought into operative connection with one another. Device according to one of claims 1 to 6, characterized in that a plurality of needle rollers (2) are mounted one behind the other in the direction of passage of the film (1), in such a way that the work areas of needle rollers (2) which are adjacent to one another are directly adjacent to one another. Apparatus according to claim 7, characterized in that a plurality of needle rollers (2) offset one behind the other has a counter roller (3) in common. Apparatus according to claim 8, characterized in that the needle rollers (2) assigned to a common counter roller (3) are arranged offset by 180 ° to one another radially to the counter roller (3). Device according to one of the preceding claims, characterized in that at least some of the counter rollers (3) are replaced by a counter roller (3 ') common to a plurality of needle rollers (2). Device according to one of the preceding claims, characterized in that several needle rollers (2) are combined to form a needle roller. Device according to claim 11, characterized in that each needle roller (2) is mounted individually or separately within the needle roller formed. Device according to one of the preceding claims, characterized in that each counter roller (3) is designed as a smooth roller. Device according to one of claims 1 to 12, characterized in that each counter roller (3 ') replacing a plurality of counter rollers (3) is designed as a smooth roller. Device according to one of claims 1 to 13, characterized in that the equipment of the outer surface (4) of each counter-roller (3) comprises a configuration in which the outer surface (4) consists at least in sections of hard-elastic material. Device according to one of claims 1 to 14, characterized in that the equipment of the lateral surfaces (4) of each counter-roller (3) or counter-roller (3 ') comprise an embodiment in which the lateral surface (4) is made, at least in sections, of hard-elastic material (5th ) consists. Apparatus according to claim 15, characterized in that the hard elastic material (5) is in the form of a layer laid around the counter roller (3) or counter roller (3 '). Apparatus according to claim 16, characterized in that the hard elastic material (5) is in the form of a layer laid around the counter roller (3) or counter roller (3 '). Device according to one of claims 15 to 18, characterized in that the hard-elastic material (5) has a hardness of more than 90 Shore, preferably 95 Shore. Device according to one of the preceding claims, characterized in that at least one of the rollers (2, 3) of a pair of rollers, or the rollers of a pair of rollers, is mounted in bearings which are equipped with an adjusting device for adjusting the center distance between the rollers of the Pair of rollers or the rollers of the pair of rollers are equipped. Apparatus according to claim 20, characterized in that the actuating device has an actuator to which a clock control is assigned. Device according to one of claims 20 and 21, characterized in that the adjusting device has at least one pressure element. Apparatus according to claim 22, characterized in that the pressure member is a spring member. Device according to claim 23, characterized in that the pressure element is a working cylinder (19, 19 '). Apparatus according to claim 22, characterized in that a device for adjusting the bias of the spring members is provided. Device according to one of the preceding claims, characterized in that deflection rollers (16, 16 ') are provided, which guide the film (1) before and after passing through the pair of rollers or rollers to the lateral surface (4) of the counter roller (3). or counter roll (3 '). Device according to one of the preceding claims, characterized in that the protrusions of the tips (8) of the needles (7) over the lateral surface (9) of the needle roller (2) or the needle roller are approximately four times the thickness of the film (1). Apparatus according to claim 27, characterized in that the ratio of the thickness of the film (1) to the projection of the spikes (8) of the needles (7) is between 1: 3.33 to 1: 4.66. Device according to one of the preceding claims, characterized in that each needle roller (2) or each needle roller has a diameter of not more than 120 mm, preferably 80 mm. Apparatus according to claim 29, characterized in that each counter roller (3) or each counter roller (3 ') has a diameter of approximately 200 mm. Device according to one of the preceding claims, characterized in that a predetermined number of needles (7) is arranged in a row distributed over a circumferential line of the needle roller or needle roller, each needle roller (2) or each needle roller several rows of needles (7) side by side having. Apparatus according to claim 31, characterized in that the needles (7) of circumferential lines (25) located next to one another or of adjacent rows are offset with respect to one another in the direction of rotation of the needle roller (2) or the needle roller. Apparatus according to claim 31 or claim 32, characterized in that each circumferential line (25) or row is aligned offset at an angle to the axis of rotation (24) or radial direction. Apparatus according to claim 33, characterized in that the offset angle of a circumferential line (25) or row is approximately 15 ° to the axis of rotation (24). Device according to one of claims 31 to 34, characterized in that the needles (7) are offset alternately or alternately on both sides of the circumferential line (25) within a row or circumferential line (25). Device according to one of claims 31 to 35, characterized in that there is a distance of approximately 8 mm between two adjacent needles (7) in a row and a distance of approximately 4 mm between the rows. Apparatus according to claim 35, characterized in that the amount of displacement, based on a circumferential line (25), is approximately 2 mm. Device according to one of the preceding claims, characterized in that the tip angle of each needle tip (8) is not greater than 25 °. Device according to claim 38, characterized in that the tip angle of each needle tip (8) is 15 ° to 20 °.

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