DE102014108121A1 - Method for processing a back side of a web material and device for carrying out the method - Google Patents

Abstract

The invention relates to a method for processing a rear side (16) of a web material (11) to a first part (19), and to an apparatus for carrying out the method, wherein the web material (11) is fed to an application head (36) having a heated deflection region (31), the rear side (17) of the web material (11) to the deflection region (41) of the application head (36) supplied facing and guided along an application head (36), subsequently the web material (11) by a between a counter-pressure roller (38) and the application head (36) formed gap (37) is guided, wherein the gap (37) is smaller than the height of the web material (11) and the application head (36) facing the pole ends (16) on the back ( 17) of the web material (11) to a precoat (21) are smoothed.

Description

The invention relates to a method for processing a back side of a web material for producing a preliminary part and to a device for producing a first part.

From the DE 10 2009 038 307 A1 is the production of a floor covering, such as an artificial turf or a carpet, known. This consists of a base or carrier material - also called Tuftträger - in which is tufted by needles pile yarn. For fixing such formed tufts or loops or loops with their pole ends in the carrier material is proposed to apply hot melt adhesive on a back side of the carrier material in order to fix the pole ends to the carrier material. The pile yarn is firmly anchored in the carrier material with a precoat formed by the adhesive layer. Such intermediates may be provided with a secondary backing, especially in the manufacture of carpets. This can be formed from a foam of latex, a textile fabric or a polyurethane to form further sheets, which are connected by an adhesive layer to the precoat of the Erstrückens.

The preparation of such Erstrücken in which the pole ends are fixed to the substrate with a hot melt adhesive and a coated back is formed, has proven itself in principle, however, in this manufacturing process, an additional effort to provide and apply the hot melt adhesive is required. In addition, the maximum web speed for processing the carrier material is limited due to the hotmelt adhesive layer to be applied.

The invention has for its object to provide a method for producing a Erstrückens for a web material, in particular of a nonwoven or felt or a tufted carrier material, which is simplified and allows an increased processing speed, and an apparatus for performing the method.

This object is achieved by a method in which the back side of the web material is fed to an application head which has a heated surface at least in its deflection region, the back side of the web material, on which, for example, pile ends of the tufts lie with a tufted carrier material, to the surface of the web Aligned application head and guided along and then the web material is passed through a gap formed between a counter-pressure roller and the application head, which is smaller than the height of the supplied web material, so that the application head facing back, in particular fibers or Polenden, to a pre-coat be smoothed on the back of the web material. In this method, thus, the region of the tufts protruding from the web material on the back or the pile ends or the individually projecting fibers are at least softened by the action of heat and compressed and smoothed due to the pressure generated in the nip so that a pre-coat or a pre-coat Back coating is formed on the back of the web material. Between the heated application head and the counterpressure roller, a kind of ironing area is formed by the gap in order to fix the pile ends or fibers permanently to the web material to form a preliminary part. This method has the advantage that an additional application of an adhesive and the associated additional apparatus for applying the adhesive can be omitted. In addition, an increased web speed can be controlled to form a discharge.

A preferred embodiment of the method provides that the loops or loop regions of the pile naps or the fibers which are not completely connected formed on the back of the web material are melted by the application head and then the precoat is formed in the gap between the application head and the counterpressure roll. Due to the melting of the provided on the back loop portions of the tufts or fibers flow of the material can be carried out to preferably form a full-surface primer on the tufted substrate or a precoat on a back of a web of a nonwoven or felt layer.

For heating or for preheating the rear side of the web material, at least one deflecting roller is preferably provided in front of the application head, which deflects the web material with the back facing outward, so that the rear side of the web material is preheated with at least one heating station associated with the deflecting roller. Thereby, the processing speed can be further increased because the back of the web material can be heated already to a temperature which is just before a softening temperature of the pile yarn or the fibers, so that provided at the application head wrap angle of the carrier material to the gap between the platen and the application head is sufficient to at least plastically deform the loop or loop sections or fibers protruding on the rear side in the gap, preferably smoothing the molten pole ends.

The at least one guide roller connected upstream of the application head is preferably designed as a cooling roller. Thereby, the facing to the chill roll front, such as the tufts or fibers, cooled and not damaged by the heater, whereas on the opposite side heating of the pile ends or fibers is made possible and the web material or the tufts receiving tissue a kind of thermal Can form separation layer.

After passing the web material through the nip between the application head and the platen roller, the web material is passed along a cooling device. This may be, for example, a cooling table, which is cooled by a liquid or a gaseous medium act. Preferably, the back side of the tufted carrier material or the fleece or the felt is applied to the cooling device or is guided along this, in order to cool the pre-coat.

The web material, which rests on the application head for heating the rear side, is preferably guided along an angle of wrap in a range between 5 ° and 60 °. The largest possible wrap angle allows for improved heating of the pole ends.

The application head is held stationary and the counter-pressure roller is driven in the transport direction of the web material, wherein the preferably peripheral speed of the counter-pressure roller corresponds to the transport speed of the web material. In addition, at least in front of the narrowest point of the gap on the application head, this results in at least slight damming of the softened material of the loop and loop sections or fibers on the back of the web material, whereby the smoothing or ironing effect is further improved.

It is preferably provided that the application head is supplied with a tufted with pile yarn carrier material having Polenden on the back and Polnoppen on the front, to form the back of the tufted substrate with a pre-coat to produce a Erstrücken. Such a groundbreaking can be further processed by applying further back coatings.

An alternative embodiment of the method provides that the application head is supplied with a web material formed from a nonwoven or felt, which comprises individually projecting and randomly oriented fibers on the back, which are smoothed and permanently bonded to one another by a precoat. Also, such materials can be provided with a further, arranged on the back coating.

The object underlying the invention is further achieved by a device for producing a preliminary crop, in particular a precoat on a tufted with tufts carrier material or a precoat on a web material made of fleece or felt, in which a support means is provided on a base frame, which an application head receives, which is opposite to a counter-pressure roller for forming a gap, wherein preferably a gap between the application head and the platen roller is adjustable and the application head has a deflection along which the web material is guided and deflected, wherein the deflection region is heatable to a working temperature in which a back side of the web material is softened and at least plastically deformable. As a result, the rear side pointing toward the deflection region of the application head is heated and the rear side softened as it travels along the path of the web so that it remains at least plastically deformable and thus protruding loop sections of the tufts or fibers at least partially remain permanently connected to the web material after passing through the gap. This can be achieved in a simple manner, the formation of a backlog.

The application head is preferably designed as a hollow cylinder, which comprises the deflection region. As a result, a statically stable deflection region can be formed. At the same time, the application head can be designed in a lightweight construction, since the application head extends over the entire web width of a substrate to be processed. This web width can be, for example, between 1 m to 5 m.

The application head is advantageously received by at least two opposing holding elements and held fixed by clamping to the carrier device. This arrangement has the advantage that due to the heating temperature of the application head temperature-induced changes in length can be accommodated and yet a structurally simple structure is given.

Each of the holding elements has a segment-shaped clamping surface which is complementary to the outer circumference of the application head. As a result, the application head can be held in a form-fitting manner between a plurality of, two mutually opposite holding elements. As a result, at the same time a self-centering of the application head to the holding elements and thus in turn allows the support means to which the holding elements are attached.

The clamping surfaces of the holding elements in each case engage laterally against the hollow cylinder, so that a wrap-around angle for guiding along the web material of at least 60 °, preferably up to 80 °, is released. The lateral arrangement of the holding elements, which engage, for example, in a range of two to four o'clock position and a range of eight to ten o'clock position on the application head, not only a central recording of the application head can be achieved but also a large wrap angle for a wrap area to be released.

The clamping surface of the holding element is preferably formed strip-shaped, which extends in the circumferential direction and has at least one transverse slot, which preferably extends in the longitudinal direction of the application head. As a result, the segment-shaped clamping surface is separated into two clamping surface sections. This embodiment has the advantage that even with a thermally induced widening of the circumference of the application head, the clamping surfaces enable a secure reception and a secure attack on the application head, since the slotted clamping surface, the two clamping surface sections are compliant to each other and can compensate for a diameter expansion.

Furthermore, retaining segments are preferably fastened to the carrying device by means of a prestressed fastening. For example, a resilient element may be provided between a threaded connection and the retaining segment in order to compensate for temperature-induced changes in length.

A further preferred embodiment of the device provides at least one adjusting element on the carrying device, which acts on the application head and a change in position along a longitudinal extent of the application head to the counter-pressure roller is adjustable. As a result, in particular with very long application heads, a uniform width of the gap can be adjustable, for example by several adjusting elements acting on the outer circumference of the application head acting on the application head. Preferably, the adjusting elements are designed as pressure screws.

It is preferably provided that the deflection roller is adjustable in height, in particular in the position movable relative to the application head. As a result, the adjustment of the wrap angle for the web material to the application head is made possible in a simple manner. Depending on the plane of the axis of rotation of the guide roller and the application head, a larger or smaller wrap angle can be achieved. The smaller the distance of the plane in which the respective axes of rotation lie, the greater the wrap angle becomes.

At least one heating element is provided in the application head. The design of the hollow cylinder not only has the advantage that the heating element can be integrated in the application head, but also that the heat remains trapped in the cavity and thus a lower energy loss is associated. Preferably, the heating element is designed as a resistance heating element or infrared radiator, which acts on the wrapping area.

Preferably, the application head in the deflection of a hardened surface or a cured material. In particular, this has a non-stick coating. Thereby, a facilitated sliding along the back of the substrate and an improved smoothing can be achieved.

The invention and further advantageous embodiments and developments thereof are described in more detail below with reference to the examples shown in the drawings and explained. The features to be taken from the description and the drawings can be applied individually according to the invention individually or in combination in any combination. Show it:

1a a schematic side view of a tufted with a pile yarn carrier material,

1b a produced by the inventive method and the device according to the invention intermediate product of the tufted carrier material according to 1a .

1c a schematic side view of a web material of a nonwoven,

1d a produced by the inventive method and the device according to the invention intermediate product of the web material according to 1c .

2 a schematic side view of the device according to the invention,

3 a schematic side view of an arrangement of an application head and a counter-pressure roller according to the device in 2 .

4 a schematically enlarged detail view of the application head and the platen roller during the processing of a tufted substrate according to 1a and

5a and 5b schematic side views of a retaining element for receiving the application head.

In 1a is a schematic side view of the web material to be processed 11 which, for example, a tufted substrate 12 which is made of a fabric 13 or a fleece consists, in which by tufting at least one pile yarn 14 is introduced to Polnoppen 15 in the form of loops or loops. These Polnoppen have Polenden 16 on which on a back 17 of the tufted substrate 12 opposite the tissue 13 protrude. These poling ends are preferred 16 designed as loop-shaped end portions. The pimples 15 are to the front 18 of the tufted substrate 12 often cut, so that individual free protruding ends of the pile yarn 14 a top 18 a carpet can form. Alternatively it can be provided that the pimples executed on the front side 15 by loops - so closed - are formed.

The pile yarn 14 consists of polymers, especially thermoplastics, such as polyester, polypropylene, polyamide or the like. The fabric may be of the same polymer family as the pile yarn 14 consist.

In such a tufted substrate 12 are the pimples 15 to the tissue 13 only prefixed and require the formation of a groundbreaking 19 a permanent connection between the pole ends 16 and the tissue 13 , In 1c is such an outreach 19 which is produced on the basis of the method described in more detail below and in particular the device for carrying out the method. The Polends 16 were at least softened by the action of temperature and then smoothed to a preferably closed area on the back 17 of the tissue 13 for fixing the pile yarns 14 to build. These through the material of Polenden 16 formed layer on the back 17 of the tissue 13 is as a primer 21 designated. Such an outreach 19 can subsequently be provided with a further back coating not shown in detail - a so-called second back. For example, a foam, in particular made of latex, can be applied. Likewise, as secondary backing textile fabrics, polyurethane foams, other surfaces or coatings depending on the application are possible.

This in 1a described tufted carrier material 12 with the pile yarn arranged therein 14 to the formation of Polnoppen 15 can be the first step 19 be provided for carpets. Furthermore, this tufted carrier material 12 be used for training of an artificial turf or other floor coverings or other coverings.

In 1b is a web material 11 made of a non-woven, which as a structure of a plurality of fibers 23 consists. In this case, it may be fibers of limited length, continuous filaments or filaments or cut yarns, which are combined in any way to a nonwoven, so a fiber layer, and interconnected. Alternatively, the web material 11 be formed by a felt, so a textile fabric of a disordered, difficult to be separated fiber material.

In 1d is the web material formed as a nonwoven layer 11 represented by the method according to the invention and described in more detail below, in particular a device for carrying out the method. The onrushing 19 consists of a primer 21 which forms a smoothed and preferably completely closed back, being on the front side 18 the untreated surface of the nonwoven layer is provided. The same applies if a felt layer is used instead of a nonwoven layer.

In 2 is a schematic side view of a device according to the invention 25 for processing a reverse side 17 a tufted carrier material 12 to the fore 19 according to 1b illustrated, wherein the arrangement and selection of a feed roller 26 , an intermediate or deflection roller 27 and a discharge roller 28 application-specific is possible. In 3 is a schematic side view of the device 25 according to 2 shown which of a base frame 31 a processing machine not shown is added. This processing machine is monitored by means of a control device and actuates individual, partly also described below operating parameters.

This device 25 includes a support device 34 , which laterally on the base frame 31 , preferably releasably, is attached. The carrying device 34 can be in height on the base frame 34 be changeable. This carrying device 34 takes over several holding elements 35 an application head 36 on, which under formation of a gap 37 to a counter pressure roller 38 is positioned. The basic setting of the gap width 37 preferably takes place via the height adjustment of the carrier device 34 to which the application head 36 over the holding elements 35 is permanently assigned. The holding elements 35 allow a fine adjustment of the gap 37 over the distance of the application head 36 to the carrying device 34 , to which in the description of the figures below 5 closer will be received. The counterpressure roller 38 is rotatable about a bearing 39 on the base frame 31 stored. These too may be able to adjust the width of the gap 37 be changeable. At the counter pressure roller 38 it is preferably a cooling roller, which has an internal cooling. On the outer circumference is the counter-pressure roller 38 provided with a smooth, preferably polished and / or hardened, surface.

Out 2 is a trajectory of the tufted substrate 12 through the device 25 refer to. The tufted substrate 12 is via the feed roller 26 at the counterpressure roller 38 For example, deflected before the tufted substrate 12 abuts the intermediate roll and is deflected. Alternatively, the tufted material 12 even without touching the counterpressure roller 28 the intermediate roller 27 be fed directly. The intermediate roller 27 is with respect to their orientation to the application head 36 aligned such that the largest possible angle of wrap for the passage of the tufted carrier material 12 at a deflection area 41 of the application head 36 he follows. The deflection roller is preferred 27 in height to the application head 36 moved, whereby the wrap angle is adjustable. The tufted substrate 12 gets through the gap 37 passed through. The resulting development 19 is at a cooling device 42 guided along, which is preferably designed as a segmental cooling table. At the outlet side of the cooling device 42 will be the first step 19 over the discharge roller 28 another subsequent processing station or a take-up reel, both of which are not shown in detail supplied.

4 shows an enlarged view of the device 25 according to 2 , The carrying device 34 is shown for example as a hollow shaft or hollow cylinder in partial section, which arranged on the respective ends axes to the base frame 31 is attached. Alternatively, the carrying device 34 Also be designed as a support profile, which is transverse to the transport direction of the tufted support material 12 comprises a rigid cross-section.

The application head 36 is preferably axially parallel to the support device 34 arranged and is about several holding elements 35 preferably fixed to the support device 34 positioned. Preference is given to two opposing holding elements 35 provided the order header 36 take under clamping and the support device 34 fix. About the length of the application head 36 are several pairs of opposing holding elements 35 provided, as exemplified in 3 is shown. Through the retaining elements 35 becomes the application head 36 at a predetermined distance from the support 34 fixed, wherein by means of several along the longitudinal axis arranged adjusting elements 44 , which are designed in particular as a pressure screw, a fine adjustment at a distance from the application head 36 to the carrying device 34 is possible. This fine adjustment can equally over the entire length of the application head 36 done or only selectively, for example, a deflection in the central region of the application head 36 to compensate.

The holding element 35 shows how the 5a and 5b show a clamping surface 37 which has a curvature that corresponds to an outer circumference 48 of the application head 36 equivalent. By a detachable attachment 50 becomes each holding element 35 firmly with the carrying device 34 connected, wherein by the mutually facing clamping surfaces 47 the holding elements 35 a clamping attachment of the application head 36 to the carrying device 34 he follows. The attachment 50 for the holding elements 35 includes, for example, at least one compliant element 51 to expansions of the retaining element 35 and / or the carrying device 34 due to the temperature changes to compensate. In the exemplary embodiment, this is at least one compliant element 51 designed as a plate spring, which is positioned between a mounting head of a fastening screw and an associated bore.

The holding element 35 includes a two-part clamping surface 47 , An upper and lower clamping surface section 53 . 54 are through a transverse slot 56 separated from each other. This lower clamping surface section 54 preferably has a tapered end portion 57 on, leaving an outside 58 with the lower clamping surface portion 54 includes an acute angle. Through the two-part clamping surface 47 is possible that, for example by means of or the adjustment elements 44 a height adjustment of the application head 36 is only partially possible, that is, that a feed movement of the adjustment 44 in the acting area on the application head 36 a slight widening of the transverse slot 56 causes, so that the lower clamping surface portion 54 continue to the upper clamping surface section 53 is spaced. This not only allows the setting of a uniform gap 37 to the counter pressure roller 38 along the roll length, but also a gap width of the gap 37 adjusted and in particular fine-adjusted.

The application head 36 , which is preferably designed as a hollow shaft or hollow cylinder, consists of a hardened material or of a high-strength material having a preferably hardened surface, which is smooth. Furthermore is on the outer circumference 38 at least in the deflection area 31 provided an anti-adhesion coating.

Within the application head 36 is a heating element 61 provided, the electrical connection cables 62 laterally to the base frame 31 out as out 3 evident. In this heating element 61 It may be a resistance heater or infrared heater, which in the direction of the deflection 41 acts to heat up this area in particular.

The tufted substrate 12 comes with the back 17 to the feed roller 26 oriented so that in the following the top 18 of the tufted substrate 12 at the counterpressure roller 38 and at the intermediate roller 27 is applied, wherein the intermediate roll 27 preferably also designed as a cooling roller. Along the transport path from the counterpressure roller 38 to the intermediate roll 27 to the application head 36 can at least one heating station 64 be provided to a back 17 of the tufted substrate 12 heat. The front 18 is doing at least by the counter-pressure roller 38 and intermediate roller 27 cooled. This allows the pile yarn 14 concerning the the back 17 forming loop ends are heated and softened, so that when reaching a first investment point 66 the back 17 of the tufted substrate 12 to the application head 36 a further lower heating of the pole ends 16 is sufficient to convert the material into an elastic or molten, preferably flowable, state, so that in the gap 37 a smoothing of the softened poles 16 he follows. This allows a preferably closed and on the tissue 13 Adhesive coating can be formed as a precoat 21 referred to as. Consequently, the tufted substrate becomes 12 in an inlet area or heating area 68 between the landing point 66 at the application head 36 and one point 67 heated. In the point 67 touches the front for the first time 18 of the tufted substrate 12 the counterpressure roller 38 , Between the point 67 and the narrowest part of the gap 37 becomes a smoothing area 70 formed, from which an educated by it 19 the gap 37 and then the application head 36 leaves. Preference is given to the gap 37 another trailer area 71 provided in which the primer 21 of the resignation 19 still slightly applied to allow homogenization by the temperature device.

By simultaneously cooling the top 18 the pimples 15 over the counterpressure roller 38 remains the visible side of the Polnoppen 15 unaffected by the heat input on the opposite side of the tufted substrate 12 through the application head 36 ,

The pile yarn 14 For example, consists of the previously described plastic fibers. For such materials, heating of the application head is preferred 36 to a working temperature at the outer periphery of at least 150 ° C, in particular in a range of 200 ° C to 300 ° C, made so that the pole ends 16 be converted into a flowable state. The material of the fabric is preferred 13 on the material of the pile yarn 16 matched so that improved thermal bonding between the pole ends 16 and the tissue 13 can be done because in particular the surface of the fabric 13 can also be melted.

The temperature of the application head 36 on the outer circumference 48 is preferred by a temperature sensor 69 detected, which, for example, on or in the holding element 35 attached or positionable in it and the outer circumference 48 of the application head 36 contacted. Alternatively, a non-contact measurement can be provided.

By the method according to the invention, the poles ends 16 on the back side 17 of the tufted substrate 12 with the tissue 13 thermobonded or thermally bonded without the addition of an additional adhesive, such as a hot melt adhesive is added.

The method described above, which is based on the tufted carrier material 12 is analogously also true for the web material 11 , which is designed as a fleece or felt layer.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009038307 A1 [0002]

Claims (21)

Method for processing a back side ( 16 ) of a web material ( 11 ) to a first ( 19 ), characterized in that - the web material ( 11 ) an application head ( 36 ), - that the back ( 17 ) of the web material ( 11 ) to the deflection area ( 41 ) of the application head ( 36 ) fed and at the heated deflection ( 41 ) of the application head ( 36 ) is guided along, - that subsequently the web material ( 11 ) by a between a counter-pressure roller ( 38 ) and the application head ( 36 ) formed gap ( 37 ) is passed through, wherein the gap ( 37 ) smaller than the height of the web material ( 11 ) in front of the gap ( 37 ) and - that to the application head ( 36 ) facing back ( 17 ) of the web material ( 11 ) to a precursor ( 21 ) is smoothed. A method according to claim 1, characterized in that on the back ( 17 ) of the web material ( 11 ) interconnected fibers ( 13 ) or Polenden ( 16 ) are formed as a loop portion along the deflection ( 41 ) are melted, and by the smoothing a preferably full-surface primer ( 21 ) to tissue ( 13 ) on the formation of the 19 ) is formed. Method according to claim 1, characterized in that in front of the application head ( 36 ) the web material ( 11 ) on at least one deflection roller ( 27 ) is guided along, with the front ( 18 ) of the web material ( 11 ) to the surface of the guide roller ( 27 ) is deflected pointing and a back ( 17 ) of the web material ( 11 ) with at least one heating station ( 64 ) is preheated. Method according to one of the preceding claims, characterized in that the counterpressure roller ( 38 ) and / or at least one deflection roller ( 27 ) is formed as a cooling roller and the adjoining surface of the web material ( 12 ) is cooled. Method according to one of the preceding claims, characterized in that a cooling device ( 42 ) between the application head ( 36 ) and the counterpressure roller ( 38 ) formed gap ( 37 ) and one in the gap ( 37 ) precursor ( 21 ) is cooled. Method according to one of the preceding claims, characterized in that the web material ( 12 ) before passing through the gap ( 37 ) with a wrap angle in the deflection region ( 41 ) of the application head ( 36 ), which preferably comprises a range between 5 ° to 60 °. Method according to one of the preceding claims, characterized in that the application head ( 36 ) fixed in a base frame ( 31 ) a processing machine ( 32 ) and the counterpressure roller ( 38 ), wherein preferably the circumferential speed of the counter-pressure roller ( 38 ) the transport speed of the web material ( 12 ) corresponds. Method according to one of the preceding claims, characterized in that an outer circumference in the deflection region ( 41 ) of the application head ( 36 ) is heated to a working temperature of at least 150 ° C, in particular from 200 ° C to 300 ° C, heated. Method according to one of the preceding claims, characterized in that the application head ( 36 ) with pile yarn ( 14 ) tufted carrier material ( 12 ), which on the back ( 27 ) Polenden ( 16 ) and on the front Polnoppen ( 15 ). Method according to one of claims 1 to 9, characterized in that the application head ( 36 ) as fleece ( 22 ) or felt formed sheet material ( 12 ), which on the back fibers ( 23 ). Device for producing a discharge ( 19 ) on a sheet material ( 11 ), - with a carrying device ( 34 ), which are attached to a base frame ( 31 ) is attached to a processing machine, - with an application head ( 36 ), which with at least one retaining element ( 35 ) to the carrying device ( 34 ), - with a counterpressure roller ( 38 ), which the application head ( 36 ) and a gap ( 37 ) between the application head ( 36 ) and the counterpressure roller ( 38 ), - with one at the application head ( 36 ) deflection region ( 41 ), along which the web material ( 11 ) is guided and deflected, which is heated to a working temperature, so that on the back ( 17 ) of the web material ( 11 ) arranged pole ends ( 16 ) or fibers ( 23 ) and in the gap ( 37 ) are at least plastically deformable. Apparatus according to claim 11, characterized in that the application head ( 36 ) is formed as a hollow cylindrical body, which the deflection area ( 41 ) on the outer circumference. Apparatus according to claim 11, characterized in that the application head ( 36 ) by at least two opposing holding elements ( 35 ) is received and fixed by clamping between lying. Device according to claim 9, characterized in that each retaining element ( 35 ) one to the outer circumference ( 48 ) of the application head ( 36 ) complementary, segment-shaped clamping surface ( 47 ) having. Apparatus according to claim 14, characterized in that the clamping surface ( 47 ) of the retaining element ( 35 ) each side of the application head ( 36 ) and a wrapping angle for the web material ( 11 ) in the deflection area ( 41 ) of up to 60 °, preferably 180 °, release. Device according to one of claims 11 to 15, characterized in that the clamping surface ( 47 ) of the retaining element ( 35 ) is strip-shaped, which extends in the circumferential direction of the application head ( 36 ) and at least one transverse slot ( 56 ), which the clamping surface ( 47 ) in an upper and lower clamping surface portion ( 53 . 54 ) separates. Device according to one of claims 11 to 16, characterized in that the retaining segment ( 35 ) by a prestressed attachment ( 50 ) on the carrying device ( 34 ), which for temperature-induced changes in length at least as a holding element ( 35 ) is yielding. Device according to one of claims 11 to 17, characterized in that on the support device ( 34 ) at least one adjusting element ( 44 ), in particular a pressure screw is provided, which at the application head ( 36 ) attacks and at least partially a gap width of the gap ( 37 ) is adjustable to the platen roller. Device according to one of claims 11 to 18, characterized in that the deflection roller ( 27 ) in the base frame ( 31 ) in the position relatively movable to the application head ( 36 ). Device according to one of claims 9 to 19, characterized in that in the application head ( 36 ) at least one heating element ( 61 ) is provided, which is preferably designed as a resistance heating element or infrared radiator. Device according to one of claims 11 to 20, characterized in that at least one surface of the deflection region ( 41 ) of the application head ( 36 ) is hardened or consists of a hardened material and preferably at least the deflection region ( 41 ) has a non-stick coating.

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