Suction roll of a lining device of a machine for the tobacco processing industry

Abstract

The invention relates, among other things, to a suction roller (36) of a covering device of a machine in the tobacco processing industry, in particular a filter attachment machine, wherein the suction roller (36) is designed to cooperate with a cutting roller (32) having knives in the circumferential direction for cutting a material strip (2) into material strip sections (39) in a cutting area. In the suction roller (36), support surfaces (166) for the material strip sections (39) each have a groove (68) extending along the axis of rotation and having a groove surface (74), wherein the grooves (68) of the support surfaces (166) have suction air bores (75) that can be subjected to negative pressure, wherein the support surfaces (166) for the material strip sections (39) each have a partial support surface (76.A) leading the respective groove (68) and a partial support surface trailing the respective groove (68).In the suction roller (36), it is provided that the negative pressure with which the suction air holes (78.A) of the leading partial support surface (76.A) of the respective support surfaces (166) are or will be acted upon, and the negative pressure with which the suction air holes (78.B) of the trailing partial support surface (76.B) of the respective support surfaces (166) are or will be acted upon, are or will be controllable independently of one another.

Description

[0001] The invention relates to a suction roller of a covering device of a machine in the tobacco processing industry, in particular a filter attachment machine.

[0002] Furthermore, the invention relates to a device, in particular a covering device, for cutting a material strip of the tobacco processing industry, in particular a covering paper strip, into material strip sections, in particular covering paper strip sections, as well as to a machine of the tobacco processing industry, in particular a filter attachment machine or multi-segment filter manufacturing machine.

[0003] Furthermore, the invention relates to a method for cutting a material strip of the tobacco processing industry, in particular tipping paper strips, into material strip sections, in particular tipping paper strip sections.

[0004] In filter attachment machines, a filter piece or mouthpiece of twice the length is inserted between cut and longitudinally spaced tobacco rods, with a glued tipping paper leaflet then being attached to the assembled cigarette-mouthpiece-cigarette group.

[0005] For example, DE 39 18 137 A1 describes a tipping paper device for a filter attachment machine. The glued tipping paper is fed in as a continuous strip and cut into individual sheets or tipping paper sheets by a cutting device.

[0006] The cutting device consists of a knife drum with outward-facing knives and a suction drum with recesses, the flank of which, in the direction of rotation, is designed as a cutting edge. Between the grooves, the suction drum has surfaces exposed to suction air, on which the tipping paper strip and the tipping paper sheets are held or guided. The knives of the rotating knife drum engage the grooves of the counter-rotating tipping paper roller, with the tipping paper strip being cut between a knife of the cutting drum and a cutting edge of the suction drum.

[0007] In the cutting process described in DE 39 18 137 A1, a pulling cut or shear cut is performed to separate the covering sheets from the covering material strip. The cutting edges of the cutting blade and the cutting edges of the suction drum slide along each other, making point-like contact. If the covering paper strips and the cutting blade are not synchronized during the shear cut, this results in an oblique cut in the separated covering sheet.

[0008] Furthermore, according to the current state of the art, a gap is required between the tipping paper sheets for the cutting process. An oscillator is used in the feeder to ensure a higher suction roller speed than the tipping material strip.

[0009] One object of the invention is to enable a secure attachment of topping sheets to rod-shaped article groups in the tobacco processing industry, in particular during the manufacturing process of smoking article products on a drum machine.

[0010] This task is solved by a suction roller of a coating device of a machine in the tobacco processing industry, in particular a filter attachment machine, wherein the suction roller is configured to cooperate with a cutting roller having knives in the circumferential direction for cutting a material strip into material strip sections in a cutting area, wherein the suction roller has a drum body that is rotatable or rotating about a rotation axis, wherein support surfaces for material strip sections are provided in the circumferential direction of the drum body and the support surfaces are arranged in the circumferential direction of the drum body, preferably at regular intervals, wherein the support surfaces each have a groove extending along the rotation axis and having a groove surface, wherein the grooves of the support surfaces have suction air bores that can be subjected to negative pressure, wherein the support surfaces for the material strip sections each have a partial support surface leading the respective groove and a partial support surface trailing the respective groove,wherein the leading partial support surface of the support surfaces and the trailing partial support surface of the support surfaces delimit the respective grooves of the support surfaces, wherein the leading partial support surface of the support surfaces each have suction air holes for the material strip sections that can be subjected to negative pressure, and the trailing partial support surface of the support surfaces each have suction air holes for the material strip sections that can be subjected to negative pressure, wherein, in particular in a conveying area of the material strip sections between the cutting area and a transfer area of the material strip sections to rod-shaped article groups of the tobacco processing industry, the negative pressure with which the suction air holes of the leading partial support surface of the respective support surfaces are or will be subjected, and the negative pressure with which the suction air holes of the trailing partial support surface of the respective support surfaces are or will be subjected,are or are controlled independently of each other.

[0011] The invention is based on the idea that by providing a suction roller with suction air holes on the leading partial support surfaces of the support surface, for example of support bodies, and with suction air holes on the trailing partial support surfaces of the support surface, in particular of support bodies, as well as with suction air holes in the grooves between the partial support surfaces of the support surface, in particular of a support body, it is possible to draw the cut material strip sections into the grooves of the support surfaces, in particular of the support body, during or after cutting the material strip into material strip sections by applying negative pressure to the suction air holes of the grooves and to bring the material strip section or the part of the material strip section drawn into the grooves into contact with the groove surface.In one embodiment, it is provided that the material strip sections are pulled into the grooves after the material strip cuts have been pulled back to the predetermined length of the material strip section to be cut.

[0012] The material strip section conveyed on the support surface is advantageously drawn into the groove of the support surface before the transfer area, ie before the transfer and / or attachment of the material strip section to a rod-shaped article, such as a rod-shaped group of segments, by applying negative pressure to suction air holes in the groove, whereby in particular a large or larger connection surface is achieved between the material strip section and the rod-shaped article or the article group.

[0013] According to the invention, during the conveyance of the material strip sections on the support surfaces, in particular the support bodies, a leading part of the material strip section is drawn into the grooves. Since the material strip sections are provided with a glue pattern on the side facing away from the suction drum, during the subsequent tacking or attachment process of the material strip sections to a rod-shaped article group, which is conveyed in the transverse axial direction on a conveyor drum arranged on the suction roller, the material strip section to be tacked is tacked to the article group with a larger wrap. Furthermore, the suction roller according to the invention also enables the processing of thicker material strips, for example with a thickness of up to 160 µm or up to 200 µm, on a coating device or a coating apparatus for rod-shaped article groups.

[0014] The grooves of the support surface, in particular of the support body, which are formed with suction air holes, ensure that a larger adhesion surface is provided for the material strip sections when adhering to a rod-shaped article group, such as a multi-segment filter group, since a part of the material strip section is or is brought into contact with the groove surface of the grooves, whereby, for example, the material strip sections are connected over a large area to the individual segments of the rod-shaped article group.

[0015] The improved process for attaching the material strip sections to the rod-shaped article groups also makes it possible to reduce the pressing force when attaching the material strip sections, thus reducing the deformation of the individual segments of the article groups. This allows even fragile or pressure-sensitive segments for rod-shaped article groups to be used in the production of rod-shaped products, or allows the pressure-sensitive segments to be handled in a material-friendly manner.

[0016] Within the scope of the invention, it is provided that the support bodies, each with a support surface for a respective material strip section, are designed as separate bodies and are arranged detachably, for example by screw connections, on the drum body of the suction roll.

[0017] In the suction roll, it is also provided that the drum body has at least one, in particular two, vacuum chambers that can be subjected to negative pressure for the suction air holes of the leading partial support surface of the respective support surface and / or the drum body has at least one, in particular two, vacuum chambers that can be subjected to negative pressure for the suction air holes of the trailing partial support surface of the respective support surface.

[0018] Preferably, in one embodiment of the suction roll, the grooves have suction air holes that can be subjected to negative pressure, wherein, in particular in the conveying area of the material strip sections between the cutting area and the transfer area of the material strip sections to rod-shaped article groups of the tobacco processing industry, the negative pressure to which the suction air holes of the grooves of the respective support surfaces are or will be acted upon, and the negative pressure to which the suction air holes of the leading partial support surface of the respective support surfaces are or will be acted upon, are controllable or controlled independently of one another and / or wherein, in particular in the conveying area of the material strip sections between the cutting area and the transfer area of the material strip sections to rod-shaped article groups of the tobacco processing industry, the negative pressure to which the suction air holes of the grooves of the respective support surfaces are or will be acted upon, and the negative pressure,with which the suction air holes of the trailing partial support surface of the respective support surfaces are or will be acted upon, are or will be controlled independently of each other. ,

[0019] In addition, a design of the suction roller is characterized in that the drum body has at least one, in particular two, vacuum chambers that can be subjected to negative pressure for the suction air holes of the respective groove of the respective support surface.

[0020] In an advantageous further development of the suction drum, it is provided that a control body, preferably a control ring or control flange, is provided for switching the negative pressure applied or to be applied to the suction air holes of the respective support surface, wherein the control body is designed, before a material strip section is cut off from the, in particular quasi-endless, material strip in the cutting area in which a material strip section is or has been cut off from the material strip, to apply negative pressure to the suction air holes of the leading partial support surface and the suction air holes of the trailing partial support surface, wherein in the cutting area before the material strip section is cut off, the negative pressure at the suction air holes of the groove of the support surface is switched off and during or after the material strip section is cut off in a transport area,in which the cut-off material strip section is placed between the cutting area of the material strip and the transfer area of the material strip section, in which the material strip section conveyed on the suction roller is attached to a rod-shaped article group of the tobacco processing industry, which is or can be conveyed transversely axially on a conveyor drum arranged on the suction roller, to apply negative pressure to the suction air holes of the groove.

[0021] According to a further aspect, the control body is advantageously designed such that by applying negative pressure to the suction air bores of the groove of the support surface in the transport area between the cutting area of the material strip and the transfer area of the material strip section, a part of the material strip section which is arranged above the groove when the material strip section is cut off is drawn into the groove of the support surface, wherein in particular after the part of the material strip section has been drawn in, the part of the material strip section which has been drawn into the groove of the support surface rests on the groove surface of the groove.

[0022] For this purpose, it is advantageous in a further development that the control body is designed such that the negative pressure at the suction air holes of the leading partial support surface is or is switched off during or after the part of the material strip section is pulled into the groove. In this case, the negative pressure at the suction air holes of the leading partial support surface in the transport area of the material strip sections is switched off or deactivated after the leading end or the end area of the material strip section is pulled into the groove. This prevents, for example, undesired upward movement of the material strip sections when the part of the material strip section is inserted into the groove.

[0023] Preferably, according to one embodiment, it is provided that in the transfer area of the material strip section, the suction air holes of the support surfaces, which are subjected to negative pressure, in particular suction air holes of the grooves and / or suction air holes of the trailing partial support surface, are or can be subjected to compressed air.

[0024] In particular, the control body is designed as a control flange arranged inside the drum body or as a control ring arranged laterally on the drum body.

[0025] In addition, a design of the suction roller is characterized in that support bodies, each with support surfaces for the material strip sections, are arranged one behind the other in the circumferential direction on the drum body.

[0026] In the suction roll, it is also provided that the leading partial support surface of the individual support surfaces for the material strip sections and the trailing partial support surface of the corresponding support surface are of different lengths in the circumferential direction, wherein in particular the groove is arranged asymmetrically in the support body, whereby, for example, the groove or the groove base of the groove is designed with a shorter distance to the leading end of the support surface, in particular the support body, compared to the distance to the trailing end of the support surface. Alternatively, the groove or the groove base of the groove is designed with a greater distance to the leading end of the support surface compared to the distance to the trailing end of the support surface. In a further embodiment, the distance of the groove to the leading end of the support surface and to the distance to the trailing end of the support surface is the same.

[0027] In a further development of the suction roll, the grooves each have exclusively one row of suction air holes or several rows of suction air holes, in particular parallel to one another, with the suction air holes in each row being arranged at regular intervals from one another. The rows of suction air holes are aligned axially parallel to the rotational axis of the suction roll. In an alternative embodiment, the suction air holes in the grooves are arranged at irregular intervals from one another.

[0028] In a further development, the suction roller is advantageously further developed in that the trailing partial support surfaces of the support surfaces each have several rows of suction air holes, in particular parallel to one another, wherein the suction air holes of each row are arranged at regular or irregular intervals from one another. Furthermore, predetermined regular or irregular patterns of suction air holes on the support surface for the material strip sections are also possible within the scope of the invention.

[0029] A design of the suction roll is characterized in that the leading partial support surfaces of the support surfaces, in particular of the support bodies, each have exclusively one row of suction air holes or have several rows of suction air holes, in particular formed parallel to one another, wherein in particular the suction air holes of the row or the suction air holes of each row are arranged at regular intervals from one another.

[0030] Preferably, a knife body cooperating with a knife of the cutting roller is arranged on the trailing partial support surface of the support surfaces, in particular the support body. This enables a reliable cutting of a material strip section from the end of the material strip resting on the support surfaces, in particular the support body.

[0031] In particular, in the case of the suction roll, the partial support surfaces of the support surfaces, in particular the support bodies, are designed with a convex curvature.

[0032] The drum body preferably has radial bodies projecting radially outward in the circumferential direction, wherein the radial bodies are arranged at predetermined intervals in the circumferential direction of the drum body and / or the support bodies, in particular with support surfaces, are each arranged on a radial body. In one embodiment, the radial bodies are detachably arranged on the drum body of the suction roll. When the radial bodies are arranged on the circumference of the drum body, interruptions are formed between the radial bodies in the circumferential direction. Furthermore, according to one embodiment, the support bodies, each having a support surface, rest on the radial bodies and are connected to the respective radial body, for example by screw connections or the like.

[0033] In particular, in a further development, it is advantageous for the radial bodies to each have at least one vacuum chamber, which can be subjected to negative pressure, for the suction air bores of the respective support body arranged on the radial body. In this case, the vacuum chamber(s) of the radial bodies for the suction air bores are connected or connectable to a vacuum source in order to apply negative pressure to the suction air bores.

[0034] For this purpose, a preferred embodiment of the suction roll provides that the radial bodies each have at least one, in particular two, vacuum chambers for the suction air bores of the leading partial support surface of the support surface, in particular of the support body, and / or the radial bodies each have at least one, in particular two, vacuum chambers for the suction air bores of the respective groove of the support surface, in particular of the support body, and / or the radial bodies each have at least one, in particular two, vacuum chambers for the suction air bores of the trailing partial support surface of the support surface, in particular of the support body. This makes it possible to apply negative pressure, ventilate, or supply compressed air to the suction air bores of the leading partial support surface, as well as the suction air bores of the grooves and the suction air bores of the trailing partial support surface, independently of one another.This results in the vacuum being switched on and off at the respective suction air holes of the leading partial support surface, the grooves and / or the trailing partial support surface by means of the respective communicating vacuum chamber(s).

[0035] Furthermore, the object is achieved by a device, in particular a tipping device, for cutting a material strip from the tobacco processing industry, in particular a tipping paper strip, into material strip sections, in particular tipping paper strip sections, having a cutting device for cutting the material strip and having a feeding device for feeding the material strip to the cutting device, wherein the cutting device has a cutting roller having a plurality of knives in the circumferential direction and a suction roller cooperating with the cutting roller, as described above, wherein the material strip is guided between the cutting roller and the suction roller. To avoid repetition, express reference is made to the above statements.

[0036] Furthermore, a further development of the device is characterized in that a conveyor drum, in particular a tack drum, for the transverse-axial conveyance of rod-shaped article groups, in particular article groups formed or consisting of individual rod-shaped article segments, is arranged on the suction roller. By means of the suction roller, the individual material strip sections are tacked to the respective article groups conveyed by the conveyor drum. During the tackling or attachment process of the material strip sections to the rod-shaped article groups, the trailing ends of the material strip sections are arranged as free ends on the article groups, wherein in particular the free ends of the material strip sections do not touch the surface of the conveyor drum or are or are not brought into contact with the surface of the conveyor drum.For the transverse axial conveyance of the rod-shaped articles on the conveyor drum, the conveyor drum has receiving troughs which are arranged one behind the other in the circumferential direction, preferably at regular intervals.

[0037] In particular, in one embodiment of the conveyor drum, in particular the tack drum, it is provided that the receiving troughs of the conveyor drum have a trough depth of 0.2 mm to 4.0 mm, in particular of 0.2 mm or of 0.3 mm or of 0.4 mm to 3.0 mm or of up to 2.0 mm or of up to 1.0 mm.

[0038] Furthermore, it is provided in the conveyor drum that the receiving troughs of the conveyor drum have a pitch of equal to / greater than 4π mm or equal to / greater than 6π mm or equal to / greater than 8π mm.

[0039] The pitch distance refers to the axial spacing of the receiving troughs. The distance is measured from the trough center of the receiving trough to the adjacent trough center of the adjacent receiving trough of the trough conveyor that transports the rod-shaped articles on the surface, such as a conveyor drum, or from the trough base to the trough base in the case of a prism-shaped receiving trough, for example. The pitch distance for a conveyor drum is the axial spacing or the length of the (circular) arc between (circumferentially adjacent) trough centers on the circular line on which the trough centers or the trough center axes of the receiving troughs are located.

[0040] The pitch of a drum or conveyor drum, also called pitch spacing, is defined as the quotient of the circumference and the number of receiving troughs arranged on the circumference. For example, if a conveyor drum has a diameter of 400 mm, then the circumference of the conveyor drum is 400π mm. The diameter and circumference of the conveyor drum are always specified in millimeters in this application. For example, if a conveyor drum with a circumference of 400π mm has 40 receiving troughs, the pitch spacing or pitch of this conveyor drum is 10π mm.

[0041] Preferably, the diameter of the conveyor drum on the suction roll is equal to / greater than 250 mm or 300 mm or less than 800 mm, in particular less than 600 mm. In an advantageous embodiment, the diameter of the conveyor drum is 400 mm.

[0042] According to a further embodiment of the conveyor drum, an air curtain generating device is provided to keep the trailing free ends of the material strip sections away from the surface of the conveyor drum. In one embodiment, the conveyor drum can have blowing air openings to apply blowing air to the trailing free ends of the material strip sections. In another or additional embodiment, a blowing air device is arranged laterally on the conveyor drum to apply blowing air to the trailing free ends of the material strip sections.

[0043] Furthermore, in a further development of the conveyor drum, it is provided that a cleaning device is arranged on the conveyor drum, wherein in particular the cleaning device is arranged between a discharge area, in which the rod-shaped article groups conveyed on the conveyor drum, to which the material strip sections have been attached, are transferred to a subsequent downstream conveyor drum, and a receiving area, in which the rod-shaped article groups are transferred from an upstream conveyor drum to the conveyor drum arranged on the suction roller. By means of the cleaning device, it is possible for contaminants to be removed from the surface of the conveyor drum arranged on the suction roller before the rod-shaped article groups are received, and for the surface of the conveyor drum to be cleaned. For example, the cleaning device is designed as a brush or with a brush.

[0044] Furthermore, the object is achieved by a machine of the tobacco processing industry, in particular a filter attachment machine or multi-segment filter manufacturing machine, with a device, in particular a coating device, or using a suction roller, as described above.

[0045] Furthermore, the object is achieved by a method for cutting a material strip from the tobacco processing industry, in particular tipping paper strips, into material strip sections, in particular tipping paper strip sections, using a device described above, in particular a tipping device, or using a suction roller described above. Reference is made to the above explanations.

[0046] Further features of the invention will become apparent from the description of embodiments of the invention together with the claims and the accompanying drawings. Embodiments of the invention may incorporate individual features or a combination of several features.

[0047] Within the scope of the invention, features marked with "in particular" or "preferably" are to be understood as optional features.

[0048] In the drawings, identical or similar elements and / or parts are provided with the same reference numbers, so that a repeated presentation is omitted.

[0049] The invention is described below, without limiting the general inventive concept, using exemplary embodiments with reference to the drawings, whereby express reference is made to the drawings for all details of the invention not explained in more detail in the text. They show: Fig. 1 schematically shows an embodiment of a lining cutting device of a filter attachment machine in a side view; Fig. 2 schematically shows an enlarged view of the lining cutting device from Fig. 1 , Fig. 3 schematically shows a perspective view of a suction roll according to the invention, and Fig. 4 schematically shows a perspective view of a transfer area for material sections on the covering cutting device, Fig. 5 schematically shows a view of a drum arrangement for the transverse axial conveying of rod-shaped article groups and Fig. 6 schematically shows a detailed view of the drum arrangement of Fig. 5 .

[0050] In the drawings, identical or similar elements and / or parts are provided with the same reference numbers, so that a repeated presentation is omitted.

[0051] Fig. 1shows a schematic side view of a device 1 for feeding a tipping paper strip 2 into a schematically designated filter attachment machine F. A filter attachment machine from Körber Technologies GmbH is known under the designation MAX. The device 1 is described below based on the path of the tipping paper strip 2 (as a material strip).

[0052] The tipping paper strip 2 is drawn off from a supply roll 4 rotating around an axis 5 in the direction of the arrow by means of a pair of draw-off rollers 6 and 8. One of the two draw-off rollers, here the draw-off roller 6, is driven by a drive 11 via a toothed belt 7.

[0053] Before the tipping paper strip 2 reaches the take-off rollers 6 and 8, it is conveyed via a deflection roller 12 to a breaker 14. The breaker 14 breaks the paper of the tipping paper strip 2 so that it can later be more easily wrapped around assembled filter cigarette groups.

[0054] Downstream of the take-off rollers 6 and 8, a gluing device 22 is provided for applying glue patterns to the tipping paper strip 2. The gluing device 22 has a glue nozzle 24. Glue patterns are applied to the tipping paper strip 2 using the glue nozzle 24.

[0055] Downstream of the gluing device 22, the tipping paper strip 2 passes via deflection rollers 26, 28, and 29 to a tipping cutting device 30 for periodically separating tipping paper sections from the tipping paper strip 2. The tipping cutting device 30 is arranged behind the glue nozzle 24 at a fixed path length in the direction of movement 20 of the tipping paper strip 2. With the tipping paper strip 2 always remaining the same length between the glue nozzle 24 and the tipping cutting device 30, the glue pattern produced is aligned to the position of the cut during the cut by controlling the glue nozzle 24.

[0056] The covering cutting device 30 has a knife roller 32 with knives 34 arranged on its circumference, which are slightly angled relative to the radial one, and a counter-rotating suction roller 36 designed as a covering paper drum or covering paper roller, which receives the covering paper strip 2.

[0057] The suction roller 36 has groove-like recesses 38 into which the knives 34, due to the distance between the rollers 32 and 36 from one another, engage during rotation of the two rollers 32 and 36 in order to sever the tipping paper strip 2 sitting on the circumference of the suction roller 36. Below the support surfaces 40 provided on the circumference of the suction roller 36, the suction roller 36 has suction air bores 42 connected to a suction device for holding the tipping paper strip 2 and the separated tipping paper sheets 39 on the suction roller 36.

[0058] According to the invention, in contrast to the prior art, no oscillator is arranged between the deflection rollers 26 and 28. Thus, the tipping paper strip 2 is continuously conveyed to the tipping cutting device 30 at a constant or uniform conveying speed. The conveying speed of the tipping paper strip 2 is not varied, for example, by means of an otherwise provided oscillator or the like.

[0059] The Fig. 2 shows a schematic, enlarged detail of the covering cutting device 30. The covering paper strip 2 is conveyed to the suction roller 36. The peripheral surface of the suction roller 36 is subjected to suction air in the usual way, which is supplied via suction air bores 42 and 43 and holds and guides the covering paper strip 2 on the surface of the suction roller 36. The suction roller 36 has grooves or recesses 38 in its peripheral surface that are axially parallel to the axis of rotation, the front flank 47 of which, in the running direction, is provided as a cutting edge for the separating cut that separates the covering paper sheets 39 (as material strip sections) from the covering paper strip 2.

[0060] The knife roller 32 carries knives 34 on its circumference, which run transversely to the direction of rotation and which, as they rotate, successively engage the grooves 38 of the suction roller 36. The cutting edges of the knives 34 are aligned parallel to the axis of the knife roller 32, so that the cutting edge of the knife 34 rotates over the entire width or length on a (single) cutting circle, wherein the cut begins with the immersion of the straight cutting edge into the corresponding groove or recess 38 of the suction roller 36, executing a full-edge cut, and ends after the immersion of the cutting edge with the severing of the tipping paper strip.

[0061] The suction roller 36 has support bodies 50 arranged in the circumferential direction of the suction roller 36, which have corresponding support surfaces 40 on the outside for the tipping paper sheets 39 or the tipping paper strip 2. Recesses 38 are formed as an interruption between the support bodies 50.

[0062] In Fig. 3 1 shows a schematic perspective view of a suction roll 36 according to the invention. The suction roll 36 has a drum body 62, wherein the drum body 62 is formed in the circumferential direction with radial bodies 64 projecting radially outwards. The radial bodies 64 are spaced apart from one another in the circumferential direction, so that a free space is formed between two radial bodies 64. In one embodiment, the radial bodies 64 are an integral part of the drum body 62. In another embodiment, the radial bodies 64 are formed as separate bodies and are detachably arranged on the, for example, cylindrical, drum body 62. Appropriate screw connections or the like are provided to connect the radial bodies 64 to the drum body.

[0063] Support bodies 66 for the tipping paper sheets 39 are provided or arranged on the radial bodies 64. The support bodies 66 are detachably connected to the radial bodies 64, for example, by screw connections or the like. The support bodies 66 each have a support surface 166 for the tipping paper sheets 39 on their outer side. The support surface 166 of the support bodies 66 each has, with respect to the direction of rotation of the suction roller 36, a leading partial support surface 76.A and a trailing partial support surface 76.B for the tipping paper sheets 39. A groove 68 is formed between each leading partial support surface 76.A and the trailing partial support surface 76.B. Fig. 3A tipping paper sheet 39 is shown schematically in dashed lines. Furthermore, on the trailing partial support surface 76.B of the support surface 166 of the support body 66, a knife body 90 is arranged, each cooperating with a knife 34 of the knife roller 32, in order to cut the tipping paper sheets 39.

[0064] In the illustrated embodiment, the groove 68 is formed asymmetrically on the support bodies 66, with the groove 68 being displaced in the direction of the leading partial support surface 76.A. Thus, the distance of the groove 68 to the leading partial support surface 76.A is smaller than the distance of the groove 68 to the trailing partial support surface 76.B.

[0065] The leading partial support surface 76.A has a row of suction air openings 78.A, wherein the row of suction air openings 78.A is aligned axially parallel to the rotational axis of the drum body 62. The trailing partial support surface 76.B has several rows of suction air openings 78.B, which are also arranged axially parallel to the rotational axis of the drum body 62.

[0066] Furthermore, the grooves 68 of the respective support bodies 66 or the support surface 166 have a groove surface 74, wherein the curved groove surface 74 has several rows of suction air openings 75 which are aligned parallel to one another and arranged axially parallel to the axis of rotation of the drum body 62.

[0067] The suction air openings 75 of the grooves 68 as well as the suction air openings 78.A of the leading partial support surfaces 76.A and the suction air openings 78.B of the trailing partial support surfaces 76.B are connected to a vacuum source (also not shown here) via suction air bores (not shown here) in the respective support body 66.

[0068] The radial bodies 64, on which the support bodies 66 are arranged, have two adjacent vacuum chambers 81.1, 81.2 for the suction air openings 78.A of the leading partial support surfaces 76.A. Furthermore, the radial bodies 64 have two adjacent vacuum chambers 83.1, 83.2 for the suction air openings 78.B of the trailing partial support surfaces 78.B. Furthermore, the radial bodies 64 have two adjacent vacuum chambers 82.1, 82.2 for the suction air openings 75 of the grooves 68.

[0069] The vacuum chambers 81.1, 81.2 communicate with the suction air openings 78.A of the leading partial support surfaces 76.A, the vacuum chambers 82.1, 82.2 communicate with the suction air openings 75 of the grooves 68 and the vacuum chambers 83.1, 83.2 communicate with the suction air openings 78.B of the trailing partial support surfaces 76.B.

[0070] A control ring 110 is arranged on the end face of the drum body 62 to switch the vacuum at the suction air openings 75, 78.A, 78.B of the support surface 166 of the support body 66 depending on the rotational position of the support surface 166 of the support body 66. The control body or control ring 110 is preferably designed such that before and / or during the cutting of the tipping paper sheets 39 from the tipping paper strip 2, the vacuum chambers 81.1, 81.2 for the suction air openings 78.A of the leading partial support surface 76.A and the vacuum chambers 83.1, 83.2 for the suction air openings 78.B of the trailing partial support surface are subjected to negative pressure in order to hold the tipping paper sheet 83 during the cutting process. During the cutting process, the vacuum chambers 82.1, 82.2 for the suction air openings 75 of the grooves 68 are not subjected to negative pressure.

[0071] After the cutting process, in the transfer area between the knife roller 32 and a transfer area between the rotatingly driven suction roller 36 and a conveyor drum 100 arranged on the suction roller 36 (cf. Fig. 4 ), on which rod-shaped article groups 200 are conveyed, the tipping paper sheets 39 are conveyed on the support bodies 66, wherein the tipping paper sheets 39 are then attached to the article groups 200 by the support bodies 66 in the transfer area.

[0072] The control body in the interior of the drum body 62 is further configured to apply negative pressure to the vacuum chamber 82.1, 82.2 for the suction air openings 75 of the grooves 68 after the cutting of the tipping paper sheet 39, whereby the leading end of the tipping paper strips 39 is drawn into the grooves 68, whereby the leading end of the tipping paper strips 39 comes to rest on the groove surface 74 of the grooves 68.

[0073] After the leading end of the tipping paper strip 39 is retracted into the grooves 68, the negative pressure at the negative pressure chambers 81.1, 81.2 for the suction air openings 78.A of the leading partial support surfaces 76.A is switched off.

[0074] In Fig. 4 is a schematic perspective view of a transfer area between the suction roller 36 and a conveyor drum 100, on which rod-shaped article groups 200 are conveyed in the transverse axial direction. Here, the cut tipping paper strips 39 are conveyed from the suction roller 36 onto the support bodies 66 to the transfer area, wherein the leading end of the tipping paper strips 39 rests in the grooves 68 of the support bodies 66 and is held by means of negative pressure at the suction air openings 75, while the trailing end of the tipping paper strips 39 is held by means of negative pressure at the suction air openings 78.B of the trailing partial support surfaces 76.B.

[0075] When attaching the tipping paper strips 39 to the article groups 200, the leading and curved end of the tipping paper strips 39 is lightly pressed onto the upper side of the article groups, whereby due to the pre-forming of the leading end of the tipping paper strips 39 by the grooves 68, a larger wrap or larger contact area is formed between the attached tipping paper strip 39 and the corresponding article group 200.

[0076] The Fig. 3 and 4 The suction roller 36 shown can, in one embodiment, also be part of a multi-segment production machine. Furthermore, the suction roller 36 is also configured to cut thicker tipping paper strips or material strip sections and attach them to corresponding article groups.

[0077] In Fig. 5A diagrammatic view of a drum arrangement T for the transverse axial conveying of rod-shaped article groups is shown. A section of the drum arrangement T is shown in the schematic detailed view of Fig. 6 shown.

[0078] The drum arrangement T is, for example, a component of a multi-segment bar production machine or multi-segment production machine and has a conveyor drum 101 on which the covering cutting device 30 formed with the suction roller 36 and the knife roller 32 is arranged.

[0079] Upstream of the conveyor drum 101, a conveyor drum 99 is arranged, which transfers rod-shaped article groups 200 to the conveyor drum 101. By means of the suction roller 36, the cut tipping paper strips are attached to the article groups 200 conveyed transversely on the conveyor drum 101. In this case, the suction roller 36 is arranged, for example, according to the Fig. 3 illustrated embodiment.

[0080] The tipping paper strips cut on the suction roller 36 are conveyed to the transfer area between the suction roller 36 and the conveyor drum 101, wherein the leading and curved end of the tipping paper strips is pressed onto the article groups 200 on the upper side, so that the tipping paper strips are attached to the article groups 200 with a large wrap, wherein the trailing end of the attached tipping paper strips lags behind as the free end of the respective article group as a type of flag.

[0081] The conveyor drum 101 is designed, for example, as a tack drum and conveys the rod-shaped article groups 200, for example multi-segment products or an intermediate product which is formed in particular as a segment assembly from several, in particular individual and / or loose, segments.

[0082] The article groups provided with covering paper strips are then conveyed to a rolling device R having at least one roller belt 150, wherein the article groups 200 are wrapped in the rolling channel 140 with the attached covering strips by the engagement of the at least one roller belt 150 with the article groups 200 conveyed into a rolling channel 140 formed between the at least one roller belt 150 and the conveyor drum 101.

[0083] The wrapped article groups 200 are then transferred from the conveyor drum 101 to a subsequent conveyor drum 102. According to the Fig. 5 In the embodiment shown, the conveyor drum 102 is designed as a cutting drum with at least one cutting blade 103, so that the wrapped article groups are cut by means of the at least one cutting blade 103.

[0084] As can be seen from the illustration in Fig. 6As can be seen, the conveyor drum 101 is formed with shallow receiving troughs 120. The trough depth of the receiving troughs 120 is, for example, 0.2 mm, 0.3 mm, or 0.4 mm. Preferably, the transverse axial pitch of the receiving troughs 120 of the conveyor drum 101 is 4π mm or 6π mm in preferred embodiments. Typically, the diameter of the conveyor drum 101 in one embodiment is 400 mm.

[0085] In the area between the suction roller 36 and the beginning of the rolling channel 140, an air curtain generating device 160 is arranged laterally on the receiving troughs 120, so that blast air is introduced into the area between the upper side of the circumferential surface of the conveyor drum 101 and the respective trailing ends of the covering strips, thereby preventing the trailing free ends of the covering strips from coming into contact with the upper side of the conveyor drum 101. As a result, the free ends of the covering strips are kept at a distance from the surface or upper side of the conveyor drum 101 during conveyance in the direction of the rolling channel 140.

[0086] After the transfer of the wrapped article groups 200 from the conveyor drum 101 to the subsequent conveyor drum 102, a rotating brush or roller brush 104 is arranged on the conveyor drum 101 in the area between the downstream conveyor drum 102 and the upstream conveyor drum 99 in order to clean the surface of the conveyor drum 101 and the receiving troughs 120 of the conveyor drum 101.

[0087] All mentioned features, including those that can be gathered from the drawings alone, as well as individual features disclosed in combination with other features, are considered essential to the invention, both individually and in combination. Embodiments according to the invention may be fulfilled by individual features or a combination of several features. Within the scope of the invention, features marked "in particular" or "preferably" are to be understood as optional features. List of reference symbols

[0088] 1Device 2Tipping paper strip 4Supply roll 5Axis 6Take-off roller 8Tailored roller pair 7Timing belt 11Drive 12Deflection roller 14Crusher 22Gluing device 24Glue nozzle 26Deflection roller 28Deflection roller 29Deflection roller 30Tipping cutting device 32Knife roller 34Knife 36Suction roller 38Recess 39Tipping paper sheet 40Support surface 42Suction air hole 43Suction air hole 47Flank 50Support body 62Drum body 64Radial body 66Support body 68Groove 74Groove surface 75Suction air openings 76.ALeading partial surface 76.BLagging partial surface 78.ASuction air openings 78.BSuction air openings 81.1, 81.2Vacuum chamber 82.1, 82.2Vacuum chamber 83.1, 83.2Vacuum chamber 90Knife body 99Conveyor drum 100Conveyor drum 101Conveyor drum 102Conveyor drum 103Cutting knife 104Roller brush 110Control ring 120Receiving trough 140Rolling channel 150Rolling belt 160Air curtain generating device 166Support surface 200Item group FFilter attachment machine RRolling device TDrum arrangement

Claims

1. A suction roller (36) of a covering device of a machine in the tobacco processing industry, in particular a filter attachment machine, wherein the suction roller (36) is configured to cooperate with a cutting roller (32) having knives in the circumferential direction for cutting a material strip (2) into material strip sections (39) in a cutting area, wherein the suction roller (36) has a drum body (62) that is rotatable or rotating about a rotation axis, wherein support surfaces for material strip sections (39) are provided in the circumferential direction of the drum body (62), and the support surfaces (166) are arranged in the circumferential direction of the drum body (62), preferably at regular intervals, wherein the support surfaces (166) each have a groove (68) extending along the rotation axis and having a groove surface (74), wherein the grooves (68) of the support surfaces (166) have suction air bores (75) that can be subjected to negative pressure,wherein the support surfaces (166) for the material strip sections (39) each have a partial support surface (76.A) leading the respective groove (68) and a partial support surface trailing the respective groove (68), wherein the leading partial support surface (76.A) of the support surfaces (166) and the trailing partial support surface (76.B) of the support surfaces (166) delimit the respective grooves (68) of the support surfaces (166), wherein the leading partial support surface (76.A) of the support surfaces (166) each have suction air bores (78.A) for the material strip sections (39) that can be subjected to negative pressure, and the trailing partial support surface (76.B) of the support surfaces (166) each have suction air bores (78.B) for the material strip sections (39) that can be subjected to negative pressure, wherein,in particular in a conveying area of the material strip sections (39) between the cutting area and a transfer area of the material strip sections (39) to rod-shaped article groups (200) of the tobacco processing industry, the negative pressure with which the suction air holes (78.A) of the leading partial support surface (76.A) of the respective support surfaces (166) are or will be acted upon, and the negative pressure with which the suction air holes (78.B) of the trailing partial support surface (76.B) of the respective support surfaces (166) are or will be acted upon, are or will be controlled independently of one another.

2. Suction roll (36) according to claim 1, characterized in thatthe drum body (62) has at least one, in particular two, vacuum chambers (81.1, 81.2) which can be subjected to negative pressure for the suction air bores (78.A) of the leading partial support surface (76.A) of the respective support surface (166) and / or the drum body (62) has at least one, in particular two, vacuum chambers (83.1, 83.2) which can be subjected to negative pressure for the suction air bores (78.B) of the trailing partial support surface (76.B) of the respective support surface (166).

3. Suction roll (36) according to claim 1 or 2, characterized in thatthe grooves (68) have suction air bores (75, 78.A, 78.B) which can be subjected to negative pressure, wherein, in particular in the conveying area of the material strip sections (39) between the cutting area and the transfer area of the material strip sections (39) to rod-shaped article groups (200) of the tobacco processing industry, the negative pressure with which the suction air bores (75, 78.A, 78.B) of the grooves (68) of the respective support surfaces (166) are or will be subjected, and the negative pressure with which the suction air bores (78.A) of the leading partial support surface (76.A) of the respective support surfaces (166) are or will be subjected to, are controllable or regulated independently of one another and / or wherein, in particular in the conveying region of the material strip sections (39) between the cutting region and the transfer region of the material strip sections (39) to rod-shaped article groups (200) of the tobacco processing industry, the negative pressure with which the suction air bores (75, 78.A, 78.B) of the grooves (68) of the respective support surfaces (166) are or will be subjected to, and the negative pressure with which the suction air bores (78.B) of the trailing partial support surface (76.B) of the respective support surfaces (166) are or will be subjected to, are controllable or regulated independently of one another, wherein in particular the drum body has at least one, in particular two, vacuum chambers (82.1, 82.2) which can be subjected to negative pressure for the suction air bores (75) of the respective groove (68) of the respective support surface (166).

4. Suction roll (36) according to one of claims 1 to 3, characterized in thata control body (110), preferably a control ring (110) or control flange, is provided for switching the negative pressure applied or to be applied to the suction air bores (75, 78.A, 78.B) of the respective support surface (166), wherein the control body is designed, before a material strip section (39) is cut off from the, in particular quasi-endless, material strip (2), in the cutting area in which a material strip section (39) is cut off from the material strip (2), the suction air bores (78.A) of the leading partial support surface (76.A) and the suction air bores (78.B) of the trailing partial support surface (76.B) to apply a negative pressure, wherein in the cutting area before the material strip section (39) is cut off, the negative pressure at suction air holes (75) of the groove (68) of the support surface (166) is switched off and during or after the material strip section (39) is cut off in a transport area in which the cut-off material strip section (39) is held between the cutting area of the material strip (2) and the transfer area of the material strip section (39), in which the material strip section (39) conveyed on the suction roller (36) is attached to a rod-shaped article group (200) of the tobacco processing industry, which article group is or can be conveyed transversely axially on a conveyor drum (100) arranged on the suction roller (36).

5. Suction roll (36) according to claim 4, characterized in thatthe control body (110) is designed such that, by applying negative pressure to the suction air holes (75) of the groove (68) of the support surface (166) in the transport area between the cutting area of the material strip (2) and the transfer area of the material strip section (39), a part of the material strip section (39) which is arranged above the groove (68) when the material strip section (39) is cut off is drawn into the groove (68) of the support surface (166), wherein in particular after the part of the material strip section (39) has been drawn in, the part of the material strip section (39) which has been drawn into the groove (68) of the support surface (166) rests on the groove surface (74) of the groove (68), wherein in particular the control body (110) is designed such that during or after the part of the material strip section (39) has been drawn into the groove (68), the negative pressure is applied to the Suction air holes (78.A) of the leading partial support surface (76.A) is or is switched off.

6. Suction roll (36) according to claim 4 or 5, characterized in that in the transfer area of the material strip section (39), the suction air bores (75, 78.A, 78.B) of the support surfaces (166) which are subjected to negative pressure, in particular suction air bores (75, 78.A, 78.B) of the grooves (68) and / or suction air bores (75, 78.A, 78.B) of the trailing partial support surface (76.B), are or can be subjected to compressed air and / or that the control body (100) is designed as a control flange arranged in the interior of the drum body (62) or as a control ring (110) arranged laterally on the drum body (62).

7. Suction roll (36) according to one of claims 1 to 6, characterized in that on the drum body (62) support bodies (66) each having support surfaces (166) for the material strip sections (39) are arranged one behind the other in the circumferential direction.

8. Suction roll (36) according to one of claims 3 to 7, characterized in thatthe grooves (68) each have exclusively one row of suction air bores (75, 78.A, 78.B) or each have several rows of suction air bores (75, 78.A, 78.B), in particular formed parallel to one another, wherein in particular the suction air bores (75, 78.A, 78.B) of each row are arranged at regular intervals from one another.

9. Suction roll (36) according to one of claims 1 to 8, characterized in that the trailing partial support surfaces (76.B) of the support surfaces (166) each have a plurality of rows of suction air bores (78.B), in particular formed parallel to one another, wherein in particular the suction air bores (78.B) of each row are arranged at regular intervals from one another.

10. Suction roll (36) according to one of claims 1 to 9, characterized in thatthe leading partial support surfaces (76.A) of the support surfaces (166), in particular of the support body (66), each have exclusively one row of suction air bores (75, 78.A, 78.B) or have several rows of suction air bores (75, 78.A, 78.B), in particular formed parallel to one another, wherein in particular the suction air bores (75, 78.A, 78.B) of the row or the suction air bores (75, 78.A, 78.B) of each row are arranged at regular intervals from one another.

11. Suction roll (36) according to one of claims 1 to 10, characterized in that a knife body (90) cooperating with a knife (34) of the cutting roller (32) is arranged on the trailing partial support surface (76.B) of the support surfaces (166), in particular of the support bodies (66). and / or that the partial support surfaces (76.A, 76.B) of the support surfaces (166), in particular of the support bodies (66), are formed with a convex curvature.

12. Suction roll (36) according to one of claims 1 to 11, characterized in that the drum body (62) has radial bodies (64) projecting radially outwards in the circumferential direction, wherein the radial bodies (64) are arranged at predetermined intervals in the circumferential direction of the drum body (62) and / or the support bodies (66), in particular with support surfaces (166), are each arranged on a radial body (64).

13. Device, in particular a covering device, for cutting a material strip (2) of the tobacco processing industry, in particular a tipping paper strip (2), into material strip sections (39), in particular tipping paper strip sections, with a cutting device (30) for cutting the material strip (2) and with a feeding device for feeding the material strip (2) to the cutting device (30), wherein the cutting device (30) has a cutting roller (32) which has a plurality of knives (34) in the circumferential direction, and a suction roller (36) interacting with the cutting roller (32) according to one of claims 1 to 12, wherein the material strip (2) is guided between the cutting roller (32) and the suction roller (36).

14. A machine of the tobacco processing industry, in particular a filter attachment machine or multi-segment filter manufacturing machine, with a device according to claim 13 or using a suction roller (36) according to one of claims 1 to 12.

15. Method for cutting a material strip (2) of the tobacco processing industry, in particular tipping paper strips (2), into material strip sections (39), in particular tipping paper strip sections, using a device according to claim 13 or using a suction roller (36) according to one of claims 1 to 12.

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