Apparatus for transporting and / or deflecting a mat of material

Abstract

The invention relates to a device for transporting and / or deflecting a material mat, preferably during drying of the material mat (7) in a housing (10) of a drying machine (11), having at least two endless belts (1, 2, 3) guided by rollers (5) for transporting the material mat (7), wherein at least partially along the circumference of a drum (4) a transport area (6) for the material mat (7) is arranged, wherein for guiding and / or sealing the material mat (7) at both surface sides (8) of the material mat (7) the drum (4) and / or at least one belt is arranged in the transport area (6), and wherein at least in the transport area (6) guiding and / or sealing elements are arranged at both longitudinal sides (9) of the material mat (7). The guiding and / or sealing elements 1645 can here be realized independently, in action connection with the drum (4) or at the belts (2, 3).

Description

[0001] The present invention relates to an apparatus for transporting and / or deflecting a material pad, preferably during the drying process of the material pad, according to the preamble of claim 1.

[0002] This equipment is used industrially to convey materials or material pads, or to controllably deflect materials or material pads in a controlled environment, preferably while they are held at a surface. The material or the material pad formed therefrom can be a homogeneous or elastic structure. However, this equipment is also used to convey free-flowing materials, such as various forms of biomass, peat, wood chips, shavings, and pellets.

[0003] Particularly known are devices for drying materials or material pads, which form a material pad on a conveyor belt and guide the material pad through the housing of a dryer. Here, the material or material pad may also be guided through multiple layers and dried. Exemplary drying equipment operates using hot air, convective radiators, electromagnetic waves, or combinations thereof.

[0004] Examples of such belt dryers are known from the following publications: CH 381612 A, DE 684922A, DE1971991U, DE2441787C2, DE 4301993A1, DE 102016014642A1 or EP3467179A1.

[0005] Typically, material or a material pad is thrown from an upper conveyor belt onto a lower conveyor belt and thus guided within the dryer housing for an extended period. This implementation is space-saving and efficient. However, it may also be desirable to guide and controllably deflect the material, or to transfer it from one conveyor belt to another at a different height, such as from top to bottom or bottom to top. Here, the material or material pad is typically clamped between the two conveyor belts at its surface side and deflected along an arcuate section, such as a roller or drum. With a large roller radius, this achieves gentle deflection of the material compound or overcomes significant height differences.

[0006] In the manufacturing process of the material board, on a large industrial scale, wood shavings, wood chips, fibers, other biomass, waste wood pellets or the like are dried in this belt dryer, then glued together with adhesives and pressed into material boards in a press, and hardened by pressure and / or heat.

[0007] The object of the present invention is to provide an apparatus for transporting and / or deflecting material or material pads located on a conveyor belt, preferably used in the drying process in a dryer, which should enable problem-free, gentle and contamination-free deflection of the material or material pads.

[0008] In addition, as an extension of the mission, it should advantageously simplify the start-up and shutdown of the equipment and / or reduce the risk of contamination and fire in the equipment.

[0009] The solution to the task for the device lies in the combination of features of claim 1.

[0010] Equipment for transporting and / or deflecting material pads, preferably used during the drying process of material pads within the housing of a dryer, has at least two annular belts guided by rollers for transporting the material pads.

[0011] The roller has at least a transport area for the material pads arranged along its periphery.

[0012] In order to guide and / or seal the material pad at both surface sides, rollers and / or at least one belt are arranged in the transport area, and

[0013] At least in the transport area, guiding and / or sealing elements are arranged on both longitudinal sides of the material pad.

[0014] This invention distinguishes between rollers and rolls in terms of deflecting and / or guiding the belt used for transport. Rollers or rolls are, in principle, suitable for deflecting the belt at a portion of its periphery, where material is directly or indirectly (via the conveyor belt) against the roller / roller. The use of these terms is intended to highlight that rollers generally have a larger diameter than rolls, but the same diameter also seems appropriate. A transport zone for the material or material pad is formed at the periphery, allowing for gentle transport and / or overcoming significant height differences. The transport zone here includes a predetermined volume, or may vary depending on the material type or throughput, or includes a cross-section relative to the direction of travel, in which the material or material pad is guided and held. Here, means of increasing friction, such as ribs or rough surfaces, can be arranged on the surfaces of the rollers, belt, or following guide or sealing elements to prevent uncontrolled slippage of the material or material pad, especially when free-flowing material is to form a material pad. Start-up and shutdown operations can be advantageously optimized here. During start-up operation, blockages or backflow are avoided, and during shutdown operation, it is ensured that the material completely leaves the equipment.

[0015] Guiding or sealing elements can be implemented in different ways and methods, in combination or alternatively. In addition to walls arranged moving or stationary on the longitudinal side of the belt, lateral guiding or sealing elements can also be provided by structural adaptations at rollers and / or belts.

[0016] Terms such as adjustable, adaptable, and adaptable, in the sense of this invention, generally also include the necessary actuators to provide these movements, and therefore also the corresponding control or regulation systems to ensure the direction of the belt and the sealing or guiding of the corresponding machine components.

[0017] In a preferred embodiment, the conveyor belt secures or clamps the material pad or material to the periphery of the roller, thus ensuring sufficient friction during deflection along the transport area. In another embodiment, the material pad is guided between two belts around a deflector. Preferably, this deflector is implemented in the form of a cylindrical roller around which the belt runs. Depending on the embodiment, the cylindrical roller may also be implemented by other belt-supporting elements.

[0018] The present invention has the following advantages over the prior art:

[0019] - In addition to guiding the surface side, the longitudinal side of the material pad or material is also guided, and preferably, guided substantially unchanged around the deflection or height difference;

[0020] - Here, in the case of a uniform surface, cracks, cavities, or spalling at the edge areas of the material pad are avoided.

[0021] - During the preferred 24 / 7 production period, the level of contamination of the equipment is significantly reduced, especially by preventing material from falling off during material deflection;

[0022] - Start-up and shutdown operations are significantly simplified, avoiding backflow or residue in the transport area, which brings advantages to the safety of equipment operation during continuous or alternating operation;

[0023] This also simplifies product switching based on material type;

[0024] - By strategically arranging guiding or sealing elements, potentially contaminated areas within the housing can be localized or strategically positioned, which simplifies maintenance or allows for less or smaller equipment for decontamination.

[0025] The features or embodiments described below constitute other advantageous designs of the present invention and can be combined in any way as long as they are technically feasible.

[0026] Particularly preferably, walls angled relative to the roller periphery are provided as guiding and / or sealing elements for the longitudinal side of the material pad and / or the adjacent longitudinal side of the belt. The walls may be arranged statically or dynamically, and preferably, they are arranged movably and / or adjustablely independent of the roller or belt.

[0027] In this context, it may be advantageous if the wall is arranged as a disc at the roller, see [reference needed]. Figure 6 .

[0028] The walls can be flat, but they can also be geometrically adapted, such as curved or shaped in any other arbitrary way.

[0029] Alternatively or additionally, a groove may be provided at the roller, in which a sidewall is formed. Preferably, the roller can also be adapted to guide at least one or two belts. Advantageously, the belt abutting against the roller is guided through the groove, while the outer belt covers the groove of the roller, see [reference needed]. Figure 5 .

[0030] As Figure 5 An alternative could be conceived where the abutting belt conforms to the shape of the groove or roller, protruding from the groove area at the longitudinal edge and thus contacting another outer belt on the outside of the roller. In other words, the first belt abutting the roller conforms to a pouch or recess, while the outer belt covers the pouch or recess and more or less retains the material within the pouch.

[0031] It is reasonable to provide means or conveying elements that increase static friction on the moving wall or similar machine element (sidewall of the trough) and / or the surface of the belt, preferably providing a rough or irregular surface for the material pad. In particular, such belt, wall, or roller surfaces that form static cavities may be useful for conveying separated material or portions of the material pad, especially during start-up and shutdown.

[0032] Alternatively or additionally, the walls and / or rollers may be arranged to be movable along the axial direction of the rollers. Preferably, the walls and / or rollers are pre-tensioned relative to the belt or material pad by means of or through an actuator and / or preferably a predetermined elastic force, see [reference needed]. Figure 2 and Figure 3 .

[0033] In another alternative, or with an additional function, the wall can be guided in a groove at the periphery of the roller. Preferably, the groove is configured such that the bottom surface of the groove is radially offset relative to the running plane of the belt at the periphery of the roller, or has a different radius relative to the roller axis.

[0034] Furthermore, it is conceivable that a machine element, axially oriented to the roller and wrapping around at least one belt, is arranged at the wall. Particularly preferably, it is specified here that, when the belt abuts against the roller, a predetermined area of ​​the belt on its longitudinal side is not supported by grooves, and the machine element, preferably acting in a sealing connection with the sidewall, is engaged. Advantageously, the machine element can be implemented together with the wall as movable along the rotational axis of the roller to compensate for belt deviation if necessary; see [reference needed]. Figure 2 .

[0035] Particularly preferably, the wall is provided with two machine elements wrapped with different belts, wherein the machine elements externally guide or fix the belts, and the sidewall is sealed to prevent material or material pads from escaping from the transport area.

[0036] It may be specified that the sidewall has a protrusion that engages between the strips, or guides and / or seals the strip on the longitudinal side of the strip.

[0037] In an alternative, but also combinable, embodiment, at least one belt may be at least partially flexible or stretchable across the width of the material pad to receive and / or wrap the material pad. Thus, the two belts together function similarly to a tubular conveyor and are advantageously adapted to different heights of the material or the material pad.

[0038] It can be specified here that at least the outer region of the belt on the longitudinal side or along the longitudinal side of the belt is implemented as relatively rigid relative to the flexible or stretchable region. The more rigid outer region of the belt here serves as a guiding or sealing element and abuts against the rollers and / or wall and / or edge elements before or at the beginning of the transport area, while the material pad, through the remaining width of the belt, quasi-elastically deforms the outer belt and holds or supports the outer belt.

[0039] Edge elements can also be used instead of walls formed at the roller; these edge elements are not part of the roller.

[0040] In a physically reversed configuration, and depending on the type of material or material pad, at least one predetermined region on the longitudinal side of the strip can be implemented as flexible or stretchable, while the remaining region of the strip in width is implemented as relatively rigid relative to the longitudinal side. Advantageously, the surface of the material pad is supported relatively better than in previous variations, and the surface of the material pad is guided more gently or statically and uniformly, while the flexible lateral regions abut against another strip and serve as guiding or sealing elements.

[0041] Advantageously, a drum-shaped roller 4 and / or a surrounding groove can be provided at the roller as a guiding and / or sealing element for at least partially accommodating the belt and / or material pad. In a particularly preferred embodiment, the inner belt guided in the groove can be omitted. The outer belt can either be immersed in the groove and press the material pad into the groove of the roller, or it can cross the groove and serve as a cover, see [reference needed]. Figure 5 .

[0042] In a particularly advantageous manner, this embodiment can be used to combine flexible strips, especially strips with different strengths and / or flexibility in width.

[0043] In the features below (A12-14), the guide and sealing elements are combined with or mounted to the belt.

[0044] Therefore, it can be specified that, as guiding and / or sealing elements, at least one belt has sidewalls projecting at an angle from the surface side and / or protrusions on the longitudinal side for guiding or sealing the material pad. These sidewalls or protrusions, connected or integrated with the belt, have the advantage, depending on the belt design or type, that they can guide or seal the longitudinal side of the material pad along the running direction throughout the entire belt travel, when the material or material pad is placed on it.

[0045] Advantageously, in this independent and meaningful belt design, the entire transport area can be designed such that portions without material or material pads leave the belt due to the conveying action. Therefore, the protrusions or sidewalls on the longitudinal side of the belt do not even need to reach the full height of the material pads; the effects of the invention can be achieved with a smaller height.

[0046] In this context, sidewalls or protrusions may be implemented along the direction of travel in a single-rail or multi-rail manner and / or in a single-piece or multi-piece manner and / or in a segmented, interrupted manner. See [link to relevant documentation]. Figures 7 to 9 .

[0047] Depending on the type of conveyor belt, especially when exposed to high temperatures during the drying process or subjected to special stresses at potentially long running paths and deflections, it may be necessary to keep the belt as close as possible to the necessary height of the sidewalls, or to ensure that the belt wrapping has an appropriate geometry design to, for example, reduce notch effects, stress, or torsion.

[0048] Alternatively, it is reasonable to implement the sidewalls offset from each other, wrap around (cover, cut in from the rear), and / or contact each other over the width of at least two belts and / or axially toward the rollers, at least in the transport area. A smaller height can be achieved while simultaneously providing optimal sealing or guiding by using walls / protrusions projecting from two opposing belts.

[0049] It can be specified that, in the entrance and / or exit areas of the transport area, there are devices arranged around the roller for compressing the longitudinal side of the material pad or for moving the longitudinal side of the material pad axially inward toward the roller. This advantageously ensures that, in the transport area, the material or material pad is located behind the guiding or sealing element.

[0050] Alternatively or additionally, it may be specified that guide walls are arranged in the entrance and / or exit areas for the material pad along its longitudinal sides and / or at the belt, and these guide walls are preferably configured to be movable transversely to the direction of travel of the material pad and / or oriented. These guide walls should allow for a gentle or targeted transition of the material pad into or out of the transport area.

[0051] Alternatively or additionally, the spacing of the walls and / or guide walls in the inlet area, outlet area, and / or transport area may vary in the direction of travel and / or transverse to the direction of travel. It may be particularly preferred that these walls overlap or have a gentle transition in adjacent areas in the direction of travel when they contact the longitudinal side of the material pad.

[0052] Furthermore, it can be specified that collection or suction devices are arranged at important points, locations, or areas along the direction of material or belt movement. These devices collect or remove fallen material at transitions between the belt, walls, and guide walls. Greater operational safety can also be achieved by limiting potential contamination areas to a few points. Preferably, maintenance openings for manual cleaning within the housing can also be provided at these areas.

[0053] Other advantageous measures and designs of the subject matter of the invention are derived from the dependent claims and the following description in conjunction with the illustrative drawings.

[0054] Other advantageous measures and designs of the subject matter of the invention are derived from the dependent claims and the following description taken in conjunction with the accompanying drawings.

[0055] The attached diagram shows:

[0056] Figure 1 A schematic side view illustrates an apparatus for transporting and / or deflecting a material pad in a transport area, the apparatus being used, exemplarily, in the process of drying the material pad within the housing of a dryer, along a roller shown in a significantly enlarged manner.

[0057] Figure 2 The transport area is shown in a schematic cross-sectional view, with the direction of belt travel perpendicular to the plane of the drawing, and a first embodiment of separate guide and sealing elements is shown.

[0058] Figure 3 This is a similar schematic cross-sectional view, illustrating another embodiment of the guide and sealing elements in the transport area.

[0059] Figure 4 This is a similar schematic cross-sectional view, illustrating another embodiment of the guide and sealing elements implemented at the strip.

[0060] Figure 5 This is a similar schematic cross-sectional view, illustrating another embodiment of the guiding and sealing elements implemented at the roller.

[0061] Figure 6 This is a similar schematic cross-sectional view, illustrating another embodiment of the guiding and sealing elements implemented at the roller.

[0062] Figure 7This is a similar schematic cross-sectional view, illustrating another embodiment of the guide and sealing elements implemented at the strip.

[0063] Figure 8 This is a schematic side view of a more detailed embodiment of the guiding and sealing elements implemented at the junction, and

[0064] Figure 9 yes Figure 8 A schematic cross-sectional view of an embodiment, wherein the direction of travel of the ribbon is perpendicular to the plane of the drawing.

[0065] Figure 1 The accompanying drawings, in a schematic side view, illustrate an apparatus for transporting and / or deflecting a material pad 7 in a transport zone 6, used exemplarily in the drying of the material pad 7 within the housing 10 of a dryer 11, along a roller 4 shown in a significantly enlarged view. Material or the material pad is deposited onto a first belt 1 in an area not shown in detail or outside the housing 10 and conveyed along the direction of travel from the left side of the cross-sectional view toward the roller 4. The surface side of the material pad 7 is located on the first belt 1, while another surface side 8 is optionally freely accessible at the top.

[0066] Not shown are devices that support or perform drying, such as hot air supply or hot air guiding devices or convection or electromagnetic heating devices. Typically, the conveyor belt is permeable to airflow, and the drying air is guided from bottom to top through the housing, or layered to and from the respective conveyor belts.

[0067] In the further process of conveying, the material pad reaches the inlet area 12 before the roller 4 and the beginning of the transport area 6. Several possibilities exist for arranging the belts. In this example, in the inlet area 12, the second belt 2 is placed or supplied from above onto the free surface side 8 of the material pad 7, which abuts against the roller 4. The third belt 3 is schematically shown at a suitable transition position, taking over the material pad located on the lower surface side from the first belt 1. Finally, in the direction of travel 13, the material pad 7 is clamped between the second belt 2 and the third belt 3, and is guided upwards around the roller 4 through the transport area 6. In the outlet area 14, the material pad 7 finally rests on the second belt 2 after a 180° rotation, while the third belt 3 is lifted from the surface side by the deflecting and guiding roller 5. Other necessary rollers 5, which are not described in more detail, suitably guide and deflect the different belts 1, 2, and 3 within the housing 10.

[0068] The equipment used for deflecting and guiding material pads can also be arranged in multiple overlapping layers, thus achieving multiple layers or drying stages for the material pads.

[0069] For clarity, optional guide walls are not shown in the entrance and exit areas. These guide walls guide the longitudinal side 9 of the material pad 7 before and / or after the transport area 6 and, where necessary, ensure an unobstructed transition into and / or out of the transport area 6.

[0070] Figure 2 A schematic sectional view shows a cross-section of the transport area 6 or material pad 7, with the running directions of belts 2 and 3 perpendicular to the plane of the drawing. A first embodiment of independent guiding and sealing elements is shown in the form of movable sidewalls 15, which can be arranged to move together. In a preferred embodiment, an external groove 22 or step is provided at roller 4. The longitudinal side 19 of belt 2 is correspondingly exposed and can optionally be guided and / or sealed by a machine element 16 wrapped around belt 2. The double arrows above wall 15 indicate the conceivable mobility or flexibility of wall 15. 18 indicates a possible elastic force 18 for pressing the wall against the longitudinal side 19 of the belt.

[0071] Figure 3 Another embodiment is shown, similar to Figure 2 The sidewall 15 is arranged between belts 2 and 3 and can be adjusted or modified accordingly, variably parallel to the axis of roller 4. Here, the wall 15, which serves as a guide and sealing element, can act directly on the longitudinal side 9 of the material pad 7 or be spaced apart from it to ensure a sealing effect.

[0072] Figure 4 Another embodiment with a guiding or sealing element is shown, which is implemented in the third band 3 itself. The band 3 thus has an inwardly located region 20 in width, which can be implemented with different rigidity relative to the longitudinal side 19 of the band. For example, if region 20 is more rigid than the longitudinal side 19, this results in uniform compaction or guiding of the surface side 8 of the material pad 7, and an arcuate seal of the longitudinal side 19 or longitudinal side 9. For example, if region 20 is more flexible, while the longitudinal side 19 is implemented as very rigid, the same sealing effect is ensured, but the effect of the third band 3 on the surface side 8 of the material pad 7 is significantly more compliant.

[0073] according to Figure 5 A groove 23, with a recessed periphery, is arranged at roller 4. Material pads 7 can be guided within this groove 23, where the wall 15 of the groove 23 serves to guide and seal the material pads 7. In this example, the third strip 3 is implemented to be wider than the second strip 2. Alternatively, the second strip can be the same width as the third strip 3 and abut against the wall 15 to improve the sealing effect. Alternatively, the third strip 3 can also have the same width as the second strip 2 in the figure and be immersed in the groove 23 together. Strips with different flexibility in width, such as... Figure 4As shown in the embodiment, it can also be used in an advantageous manner in combination with slot 23.

[0074] exist Figure 6 In an optional embodiment, only the third belt 3 deflects the material pad 7 together with the roller 4. The second belt 2 is omitted here, but it can still be implemented. The guiding and sealing element 1645 is implemented here by a disc 24 at the roller, which guides the optional belts 2 and 3 and seals them if necessary.

[0075] exist Figure 7 The diagram illustrates the possibility of arranging guiding and sealing elements at belts 2 and 3. In the partial cross-sectional view on the left, the sidewall 21 of the multi-rail is shown above belt 3, and the opposing sidewall 17 of the single rail is shown at belt 2. Preferably, during passage through transport area 6, the sidewall 17 engages from below between the two upper sidewalls 21, thus creating a sealing and guiding effect. On the right, the protrusions or sidewalls 21 or 17 are shown opposite each other. For clarity, a minimum spacing is shown, and this minimum spacing should be closed for sealing, but is not mandatory. However, for larger materials, an opening may be desired to allow for lateral pressure equalization when the material pad is compressed by the third belt 3.

[0076] according to Figure 8 and Figure 9 The interrupted sidewall 21 is shown, preferably according to Figure 9 The multi-track configuration. When the spacing is large, or due to the height of the material pad 7, the sidewall 21 at belt 3 may not be able to provide an increased sidewall height radius relative to the radius of belt 3 deflected at roller 5, or may not be able to maintain its elasticity persistently under difficult conditions (dryer). For this reason, double-layered, double-track sidewalls 21 can be designed as shown, but they are spaced apart and / or interrupted. The difference between the sidewall 21 at roller 4 and at the upper roller 5 (open) in the transport area 6 (closed) is schematically shown (1645).

[0077] List of reference numerals 1645:

[0078] 1 belt

[0079] 2 belts

[0080] 3 belts

[0081] 4 rollers

[0082] 5 rollers

[0083] 6. Transportation Area

[0084] 7. Material Pad

[0085] 8. Surface side (of 7)

[0086] 9. Longitudinal side (of 7)

[0087] 10. Shell

[0088] 11. Dryer

[0089] 12 Entrance Area

[0090] 13. Direction of movement

[0091] 14 Export Area

[0092] 15 walls

[0093] 16 Machine Components

[0094] 17. Side walls (at 2 locations)

[0095] 18 Elasticity

[0096] 19 with longitudinal side

[0097] 20 regions

[0098] 21. Side walls (in 3 locations)

[0099] 22 slots (outside of 4)

[0100] 23 slots (inside 4)

[0101] 24 discs

Claims

1. An apparatus for transporting and / or deflecting a material pad, said apparatus preferably transporting and / or deflecting the material pad (7) during the drying process in the housing (10) of a dryer (11), A belt (1, 2, 3) having at least two annular rings and guided by rollers (5) is used to transport material pads (7). in, At least partly along the periphery of the roller (4), there is a transport area (6) for the material pad (7). In order to guide and / or seal the material pad (7) at both surface sides (8), the roller (4) and / or at least one belt are arranged in the transport area (6), and In particular, at least in the transport area (6), guide and / or sealing elements are arranged on the two longitudinal sides (9) of the material pad (7).

2. The device according to claim 1, characterized in that, In the transport area (6), strips (2, 3) are arranged on opposite surface sides (8) of the material pad (7).

3. The device according to claim 1 or 2, characterized in that, For or along the longitudinal side (9) of the material pad (7) and / or the longitudinal side (19) of the belt (2, 3), a wall (15) angled relative to the periphery of the roller (4) is arranged as a guide and / or sealing element.

4. The device according to claim 3, characterized in that, The wall (15) is arranged at the roller (4) as a plate (24) or as a groove (23).

5. The device according to claim 4, characterized in that, Means or conveying elements for increasing static friction are arranged at the moving wall (15) and / or at the surface side of the belt (2, 3), preferably, the material pad (7) is provided with a rough or irregular surface.

6. The device according to at least one of claims 2 to 5, characterized in that, The wall (15) and / or the roller (4) are arranged to be axially movable along the axis of the roller (4), and preferably, the wall (15) and / or the roller (4) are pre-tightened relative to the belt (2, 3) or the material pad (7) by means of an actuator and / or preferably a predetermined elastic force (18).

7. The device according to at least one of claims 2 to 6, characterized in that, The wall (15) is guided in a groove (22) at the periphery of the roller (4), and / or a machine element (16) oriented axially to the roller (4) and wrapping around the belt (2, 3) is arranged at the wall (15).

8. The device according to at least one of the preceding claims, characterized in that, At least one of the bands (2, 3) is configured to be flexible or stretchable at least partially across the width of the material pad (7) for receiving and / or wrapping the material pad (7).

9. The device according to at least claim 8, characterized in that, At least the longitudinal side (19) of the belt or the outer region of the longitudinal side (19) of the belt (2, 3) is implemented as relatively rigid relative to the flexible or stretchable region (20).

10. The device according to at least claim 8, characterized in that, At least one predetermined region of the longitudinal side (19) of the belt (2, 3) is implemented as flexible or stretchable, and the remaining region (20) of the belt (2, 3) is implemented as relatively rigid in width relative to the longitudinal side (19).

11. The device according to at least one of the preceding claims, characterized in that, A drum-shaped roller (4) and / or a surrounding groove (23) are arranged at the roller (4) as guiding and / or sealing elements for at least partially receiving the strip (2) and / or the material pad (7).

12. The device according to claim 1 or at least one of claims 2 to 11, characterized in that, As guiding and / or sealing elements, at least one of the belts (2, 3) has a sidewall (17, 21) extending at an angle from the surface side and / or a protrusion on the longitudinal side (9) of the material pad (7) for guiding or sealing.

13. The device according to claim 12, characterized in that, The sidewalls (17, 21) are implemented along the direction of travel (13) in a single rail or multi rail and / or in a single piece or multiple pieces and / or in a segmented and interrupted manner.

14. The device according to claim 12 or 13, characterized in that, The sidewalls (17, 21) are arranged offset from, wrap around and / or in contact with each other across the width of the belts (1, 2, 3) and / or axially toward the rollers (4), at least in the transport area (6).

15. The device according to at least one of the preceding claims, characterized in that, Devices for the longitudinal side (9) are arranged in the inlet area (12) and / or outlet area (14), the devices compressing the longitudinal side (9) of the material pad (7) or causing the longitudinal side (9) to move axially inward relative to the roller (4).

16. The device according to at least one of the preceding claims, characterized in that, In the inlet area (12) and / or outlet area (14), guide walls are arranged for the longitudinal side (9) of the material pad, and / or at the belts (1, 2, 3), and these guide walls are preferably configured to move and / or be oriented transversely to the running direction (13) of the material pad (7).

17. The device according to at least one of the preceding claims, characterized in that, The spacing of the walls (15) and / or the guide walls in the inlet area (12), the outlet area (14) and / or the transport area (6), in the direction of travel (13) and / or transverse to the direction of travel (13) is different, and these walls preferably overlap in adjacent areas in the direction of travel (13).

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