EP2238846A1 - Transport drum for the tobacco processing industry - Google Patents

Abstract

The drum i.e. cutting drum (36), has supporting bodies (50) arranged in a radial circumferential direction of the drum, where each supporting body has a supporting surface (40) for material strip sections. The supporting surfaces are designed in an increased manner in the circumferential direction opposite to outer surfaces (52, 54), where the outer surfaces are arranged adjacent to a rotational axis (R) of the drum in an axially-parallel direction. The supporting bodies are provided with suction holes in an area of the supporting surfaces, where the suction holes are loaded with low pressure.

Description

The invention relates to a conveyor drum of the tobacco processing industry arranged in the circumferential direction of the conveyor drum support bodies, wherein the support body each have a bearing surface for material strip portions and the support body with interruptions between the support bodies in the circumferential direction of the conveyor drum, preferably at regular intervals, are arranged. Furthermore, the invention relates to a padding device of a machine of the tobacco-processing industry, in particular filter attachment machine and a machine of the tobacco-processing industry, in particular Filteransetzmaschine.

In Filteransetzmaschinen is inserted between cut and longitudinally axially spaced tobacco rods each have a filter piece or mouthpiece, wherein then a glued connecting tab is attached to the assembled cigarette-mouthpiece-cigarette group. This is the glued connection papers supplied via a suction roll or cutting drum of a padding device with a defined pitch of the cigarette-mouthpiece-cigarette group. A defined pitch is the preselected distance of the cigarette mouthpiece cigarette groups that is greater than the length of the compound leaflet.

Method and apparatus of the type described above are used in particular for packaging on a so-called filter attachment machine transversely promoted filter cigarettes. Their performance with respect to the particles produced and ejected per unit time has increased over the course of time, and had to be adapted to the increased performance of the upstream cigarette rod machine.

In DE-A-39 18 137 (equivalent to US-A-5 054 346 ) a tipping paper aggregate of a filter attachment machine is described. Here, the glued tipping paper is supplied as an endless tipping paper strip and cut by means of a cutting device into individual leaflets or connecting leaflets. After the cut, these compound leaflets are separated and brought to the conveying speed of the portion-transported cigarette filter cigarette groups.

Based on this prior art, the object of the invention is to improve the transfer of tipping paper leaflets to smoking article groups, in particular tobacco rod filter plug tobacco rod groups, wherein the mechanical stress of the smoking article groups or of smoking article components is to be reduced in the transfer of tipping paper leaflets ,

This problem is solved by a conveyor drum of tobacco processing industry arranged in the circumferential direction of the conveyor drum support bodies, wherein the support body each have a support surface for material strip portions or Veragpapierstreifenabschnitte and the support body with interruptions between the support bodies in the circumferential direction of the conveyor drum, preferably at regular intervals, are arranged, which is further developed by the Support surface of the support body or against at least one or two in the direction parallel to the axis of rotation of the conveyor drum adjacent or adjacent outer surfaces where no strip of material or no strip of material is applied or is, is increased in the radial direction.

The invention is based on the idea that the conveyor drum, on or on the tipping paper strip, are cut into tipping paper strip sections and subsequently applied or adhered to smoking article groups consisting of tobacco rod filter plug tobacco rod groups, the tipping paper strip sections as material strip sections due to the elevation of the support bodies be pressed against the smoking article groups in the region of the filter pad in the area of the support surface, while the mechanical stress on the outer surfaces of the smoking article groups is reduced compared to the support surface, in particular at least partially, set back outer surfaces. In order to adhere a tipping paper strip portion to, for example, a double-length filter plug, the tipping paper strip portions are provided with a predetermined glue pattern.

Due to the reduced mechanical stress during the transfer of the tipping paper strip sections in the region of the outer components or tobacco sticks, the tobacco sticks are less strongly squeezed or deformed, so that the ends of the tobacco sticks do not lose their strength or hardness and less tobacco falls out of the head ends during the further processing of the cigarettes.

In particular, the support surfaces of a support body or the support body are formed in the radial direction increased relative to a region or two areas which are provided in the axis-parallel direction to the axis of rotation of the conveyor drum of the adjacent or adjacent outer surfaces, wherein no strips of material at the areas of the outer surfaces or on the outer surfaces or no strip of material section is or is being applied. Here, the areas of the outer surfaces of the support body or the support body relative to the bearing surfaces of the support body or the support body are radially offset inwardly, so that by the recessed areas of the back or the support body (s), the mechanical stress or the mechanical stress of smoking article groups is adhered to the smoking article groups when attaching arranged on the bearing surfaces of the support body material strip portions is reduced or is.

In the context of the invention, it is provided in one embodiment of the conveyor drum, that the conveyor drum has support body, wherein the support body have a, preferably central, support surface for a strip of material or a strip of material and at least one outer surface adjacent to the support surface, wherein in particular according to a development Support surface is formed between two adjacent outer surfaces. Furthermore, preferably at least a portion of the outer surface relative to the support surface is set back radially inwards.

In this case, in a preferred embodiment of the conveyor drum is provided that the one or more, preferably with respect to the support surface inwardly staggered or offset, area or regions of the outer surface or the outer surfaces is groove-like or formed as a groove or are. In particular, the groove-like regions of the outer surfaces of the support body are U-shaped or V-shaped or formed in the manner of a "U" or a "V" in cross section.

According to a further embodiment, it is preferably provided that the preferably groove-like areas of the outer surface or the outer surfaces that are recessed relative to the support surface are surrounded by non-recessed regions or adjoining non-recessed regions of the outer surface or the outer surfaces, such that in particular the non-recessed regions the outer surface (s) in the same surface, preferably lateral surface, as the support surface (s) of the support body or in the same envelope of the support surfaces of the support body of the conveyor drum are or are arranged.

For this purpose, it is further provided that the support surface of a support body for the material strip portions between two outer surfaces in the axis-parallel direction of the conveyor drum, in particular centrally disposed. This results in a symmetrical arrangement of the support surface between the two outer, radially inwardly offset or recessed outer surfaces.

According to one embodiment, it is further provided that the support surface for the material strip portions in the radial direction with an increase of 0.2 mm to 3.0 mm, preferably between 0.2 mm to 1.5 mm, is formed with respect to the outer surfaces. This is a paragraph or offset between the outer outer surfaces and reaches the intermediate raised support surface for the material strip sections.

In particular, it is advantageous if the support bodies in the area of the support surfaces have suction bores that can be acted upon by negative pressure, so that the covering paper strip sections cut on the conveyor drum or suction roll or cutting drum are conveyed on the support surface while the cutting drum rotates and in the contact area or discharge area to the smoking article groups , which are conveyed on another conveyor drum, are attached.

In a further embodiment, the support bodies are each formed with a mold cavity as a depression, so that when transferring padding paper leaves to groups of smoking articles or when approaching the cutting drum, the groups penetrate into the mold cavity, whereby, for example, a front end of the covering paper strip section with the smoking article components. Groups partially circular (part) is connected. Here, advantageously, in one development, the mold cavity in the region of the support surfaces on an increase, while the mold cavity in the outer adjacent region or in the region of the outer surfaces has a larger bore, whereby the mechanical load on the outer smoking article components is reduced.

For this purpose, it is further provided that the support surfaces for the material strip portions and / or the outer surfaces are formed with a concave curvature, so that the diameter of the enveloping lateral surfaces of the support surfaces and the outer surfaces are different.

In addition, the conveyor drum is characterized in that the drum is designed as a cutting drum of a covering device of a machine of the tobacco-processing industry, in particular a filter attachment machine. The cutting drum is also referred to synonymously as a tipping paper roll to transport cut tipping paper leaflets as material strip portions.

Furthermore, the object is achieved by a covering device of a machine of the tobacco-processing industry, in particular filter attachment machine, which is formed with a corresponding conveyor drum, as described above.

In addition, the object is achieved by a machine of the tobacco-processing industry, in particular filter attachment machine, using or with a conveyor drum described above. To avoid repetition, reference is expressly made to the above statements.

Further features of the invention will become apparent from the description of embodiments according to the invention together with the claims and the accompanying drawings. Embodiments of the invention may satisfy individual features or a combination of several features.

Fig. 1

schematisch eine Ausführungsform einer Belageinrichtung einer Filteransetzmaschine in einer schematischen Seitenansicht;

Fig.2

schematisch eine vergrößerte Darstellung der Belagschneideinrichtung aus Fig. 1;

Fig. 3

schematisch eine perspektivische Ansicht einer erfindungsgemäßen Schneidtrommel;

Fig. 4

schematisch einen Querschnitt durch eine Anordnung aus einer Schneidtrommel und eine Fördertrommel und

Fig. 5

schematisch eine Draufsicht auf einen Auflagekörper einer Schneidtrommel gemäß einer weiteren Ausgestaltung.

The invention will be described below without limiting the general inventive idea by means of embodiments with reference to the drawings, reference being expressly made to the drawings with respect to all in the text unspecified details of the invention. Show it:

Fig. 1

schematically an embodiment of a pad means of a filter attachment machine in a schematic side view;

Fig.2

schematically an enlarged view of the pad cutting device Fig. 1 ;

Fig. 3

schematically a perspective view of a cutting drum according to the invention;

Fig. 4

schematically a cross section through an arrangement of a cutting drum and a conveyor drum and

Fig. 5

schematically a plan view of a support body of a cutting drum according to another embodiment.

In the following figures, identical or similar elements or corresponding parts are provided with the same reference numerals, so that a corresponding renewed idea is dispensed with.

Fig. 1 shows a schematic side view of an apparatus 1 for supplying a partially perforated tipping paper strip 2 in a schematically designated Filteransetzmaschine F. A filter attachment machine of the patent applicant is known under the name MAX. The device 1 will be described below with reference to the path of the tipping paper strip 2.

The tipping paper strip 2 is pulled off by a supply roll 4 rotating about an axis 5 in accordance with the indicated arrow direction by means of a take-off roller pair 6 and 8. One of the two take-off rolls, here the take-off roll 6, is driven by a drive 11 via a toothed belt 7.

Before the tipping paper strip 2 reaches the take-off rolls 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 the filter-cigarette groups.

Downstream of the take-off rolls 6 and 8, a sensor 16 is arranged, which serves for detecting perforated sections on the tipping paper strip 2. The sensor 16 is, for example, a light scanner, which operates in the transmitted light or reflection method to detect perforated sections or, where appropriate, the markings on the tipping paper strip 2.

At a fixed distance downstream of the sensor 16, a gluing device 22 is provided for applying glue images to the tipping paper strip 2. The gluing device 22 has a glue nozzle 24, as for example in DE-A-44 37 764 (equivalent to US-A-5,769,947 ) is disclosed. With the help of the glue nozzle 24 glue images are applied to the tipping paper strip 2, which have glue-free zones that correspond to the perforated sections on the tipping paper strip 2, so that no glue is applied to the perforated sections.

Downstream of the gluing device 22, the tipping paper strip 2 passes via deflection rollers 26, 28 and 29 to a pad cutting device 30 for the periodic separation of pad paper sections from the pad paper strip 2. The pad cutting device 30 is arranged at a fixed path length in the direction of movement 20 of the pad paper strip 2 behind the glue nozzle 24. With always the same length of the tipping paper strip 2 between the glue nozzle 24 and the pad cutting device 30, the generated glue image becomes position during the cut by activating the glue nozzle 24 aligned with the cut.

The pad cutting device 30 has a cutterhead 32 with knives 34, which are arranged at its circumference and slightly angled relative to the radial, and a counter-rotating cutting drum 36 which receives the padding paper strip 2. The cutting drum 36 has groove-like recesses 38 into which the knives 34 due to the distance of the drums 32 and 36 to each other with rotation of the two drums 32 and 36 can dive to separate the seated on the circumference of the cutting drum 36 tipping paper strip 2. Below the bearing surfaces 40 provided on the periphery of the cutting drum 36, the cutting drum 36 has suction holes 42 connected to a suction device for holding the tipping paper strip 2 and the separated tipping paper leaflets 39 on the cutting drum 36.

Between the guide rollers 26 and 28, a standing with the tipping paper strip 2 oscillator 44 is arranged and synchronized with the drums 32 and 36 to slightly hold the tipping paper strip 2 after each cut by one of the blade 34 against the direction of movement 20 relative to the drum surface, so that a distance between the individual cut sections or covering paper leaflets 39 of the tipping paper strip 2 arises. The oscillator 44 thus converts the uniform supply of the tipping paper strip 2 to the gluing device 22 into a non-uniform supply to the pad cutting device 30. Further details of the pad cutting device 30 and of the oscillator 44 may be, for example DE-A-39 18 137 be removed.

The Fig. 2 shows schematically in a fragmentary enlarged view of the pad cutting device 30. The tipping paper strip 2 is conveyed to the cutting drum 36, which wraps around the tipping paper strip 2 with respect to the cutterhead 32 in a predetermined angle section. The peripheral surface of the cutting drum 36 is acted upon in a conventional manner with suction air, which is supplied via Saugluftbohrungen 42 and 43 and the tipping paper strip 2 adheres to the surface of the cutting drum 36 and leads and is dimensioned so that a slip between the tipping paper strip 2 and the surface of the Cutting drum 36 is possible. The cutting drum 36 has axially parallel grooves or recesses 38 in its peripheral surface, whose front edge 47 in the direction of travel is provided as the cutting edge for the tipping paper leaflets 39 separating from the tipping paper strip 2.

The knife drum 32 carries at its periphery transverse to the direction of rotation extending knife 34, which dive successively in circulation in the grooves 36 of the cutting drum 36. The cutting edges of the knives 34 are inclined at an angle to the knife drum axis so that the two ends of the cutting edge circulate on different cutting circles, starting with the dipping of the first cutting edge end into the corresponding groove 38 of the cutting drum 36 and dipping the second cutting edge end ends.

The cutting drum 46 has arranged in the circumferential direction of the cutting drum 36 support body 50, which have on the outside via corresponding bearing surfaces 40 for the tipping paper leaflets 30 and the tipping paper strip 2. Between the support bodies 50, the recesses 38 are formed as an interruption.

Fig. 3 shows a perspective view of the cutting drum 36, which has a rotation axis R. In the schematic illustration of the cutting drum 36, it can be seen that the bearing surfaces 40 for the tipping paper strip 2 and the tipping paper leaflets, respectively, are arranged in the center on the outer side, based on the width of the cutting drum 36. The bearing surfaces 40 are each bounded by the outer surfaces 52, 54.

The arranged in the middle support surfaces 40 have suction holes 42, which for reasons of better representability only for a bearing surface 40, the suction holes 42 are located. On the outer outer surfaces 52, 54, which have no suction holes, no material strip comes to rest.

The bearing surfaces 40 are each formed in the radial outward direction with a height offset relative to the bordering or adjacent outer surfaces 52, 54, so that the bearing surfaces 40 are formed with respect to the outer surfaces 52, 54 with an increase in the manner of a step or the like.

In particular, the support surfaces 40 are formed for the tipping paper leaflets 39 with an increase of 0.2 mm to 3 mm, preferably between 0.2 mm to 1.5 mm from the outer surfaces. This means that the radius for the concave bearing surfaces 40 with respect to the common axis of rotation R by the stated amounts is greater than the radial distance of the concave outer surfaces 52, 54 to the axis of rotation R.

In one embodiment, not shown, the support body in the region of the support surfaces and the adjacent or adjacent outer surfaces 52, 54 have mold cavities, wherein after cutting a tipping paper strip in the tipping paper leaflet the tipping paper leaflets the troughs of the bearing surfaces Cover 40.

The cut tipping paper leaflets 39 are conveyed by the cutting drum 36 to a subsequent conveying drum on which smoking article groups consisting of tobacco rod filter plug tobacco rod groups are conveyed, wherein at the transfer point the coated on the outside tamping paper leaflets are delivered or attached to the smoking article groups. The attachment of tipping paper leaflets to smoking article groups is for example in the documents EP-B-1 475 002 or EP-B-1 344 464 to which reference is made expressly to smoking article groups with regard to the transfer of glued tipping paper leaflets.

In Fig. 4 a cross section through the cutting drum 36 in the transfer region of the tipping paper leaflets to a smoking article group 60 is shown schematically. The smoking article groups 60 are conveyed on a conveying drum 70, which is likewise schematically drawn in cross-section. The smoking article group 60 consists of two outer tobacco rods 61 and a filter plug 62 of double length arranged between the longitudinally axially spaced tobacco rods 61.

In the middle of the cutting drum 36 is on the support surface 40, a tipping paper leaflet 39 which is attached to the smoking article group 60. How out Fig. 4 As can be seen, the support surface 40 is formed with respect to the adjacent outer surfaces 52,54 in the radial direction of the cutting drum 36 to the outside with a height offset.

Upon transfer of the tipping paper sheets 39 to the smoking article group 60, the outer ends or the outer regions become the tobacco sticks 61 are pressed by the forces exerted against the support surface 40 outer surfaces 52, 54 with lower forces, ie less mechanically stressed than the filter plug 62. In this way, the outer regions of the tobacco sticks 61 retain their filling force, resulting in less head loss in the produced cigarettes.

In Fig. 5 is shown schematically a plan view of a further inventive support body 50 of a cutting drum. The support body 50 has a support surface 40 formed centrally between two outer surfaces 72, 74 for the covering paper leaflets 30 and the tipping paper strip 2. Adjacent to the support surface 40, the adjacent outer surfaces 72, 74 respectively opposite the support surface 40 radially inwardly recessed areas 82, 84 and against the support surface 40 radially inwardly offset or formed areas 82, 84, ie that the support surface 40 relative to the groove-like and radially inwardly formed areas 82,84 of the respective outer surfaces 72, 74 is increased.

The opposite the support surface 40 adjacent recessed areas 82, 84 are in particular a groove-like cross-section, for example U-shaped or V-shaped, so that when a tipping paper strip or a tipping paper leaflet as a material strip portion on the support surface 40 during transfer or during the attachment process of the tipping paper leaflet to a smoking article group, the outer ends or outer regions of the smoking article group are less heavily mechanically stressed or less strongly pressed by the recessed regions 82, 84 of the outer surfaces 71, 74.

The adjoining the support surface 40 outer surfaces 72, 74 are with the exception of the recessed groove-like portions 82, 84 of the Outer surfaces 72, 74, arranged in the same envelope of the cutting drum on the circumference arranged support body 50. In other words, the recessed areas 82, 84 of the outer surfaces 72, 74 are surrounded by non-recessed areas 81 and 83, respectively, of the outer surfaces 72, 74 opposite the adjacent support surface 40, with the non-recessed areas 81, 83 in the same, preferably curved , Plane or enveloping the formed with a curved support surfaces 40 of the support body 50 of a cutting drum are arranged.

Furthermore, it is off Fig. 5 it can be seen that the recessed areas 82, 84 with respect to the support surface 40 and the surrounding (non-recessed) areas 81, 82 of the outer surfaces 72, 74 relative to the conveying direction of a cutting drum in the region of a front edge 80 of the support body provided in the conveying direction of the drum 50 are arranged, so that the recessed areas 82, 84 are arranged closer to the provided in the conveying direction of the drum leading edge 80 of the support body 50 as to the trailing edge 85 of the support body 50.

All mentioned features, including the drawings alone to be taken as well as individual features that are disclosed in combination with other features are considered alone and in combination as essential to the invention. Embodiments of the invention may be accomplished by individual features or a combination of several features.

LIST OF REFERENCE NUMBERS

1

contraption

2

Covering paper strip

4

supply roll

5

axis

6

off roll

8th

Off rollers

7

toothed belt

11

drive

12

deflecting

14

breaker

16

sensor

22

glueing

24

glue nozzle

26

deflecting

28

deflecting

29

deflecting

30

Covering cutter

32

cutterhead

34

knife

36

cutting drum

38

recess

39

Tipping paper

40

bearing surface

42

Saugluftbohrung

43

Saugluftbohrung

44

oscillator

47

flank

50

support body

52

outer surface

54

outer surface

60

A smoking article group

61

tobacco rod

62

filter plug

70

conveyor drum

72

outer surface

74

outer surface

80

leading edge

81

non-recessed area

82

recessed area

83

non-recessed area

84

recessed area

85

trailing edge

F

filter attachment

R

axis of rotation

Claims (9)

The drum (36) of the tobacco processing industry with in the circumferential direction of the conveyor drum (36) arranged support bodies (50), wherein the support body (50) each have a support surface (40) for material strip portions (31) and the support body (50) with interruptions (38 ) between the support bodies (50) in the circumferential direction of the conveyor drum (36), preferably arranged at regular intervals, characterized in that the support surface (40) of one or more support body (50) opposite at least one or two in the axis-parallel direction to the axis of rotation ( R) of the conveyor drum (36) adjacent outer surfaces (52, 54) on which no strip of material or no material strip portion is or is applied, is formed increased in the radial circumferential direction. Conveyor drum (36) according to claim 1, characterized in that the support surface (40) of a support body (50) for the material strip portions (31) between two outer surfaces (52, 54) in the axis-parallel direction, in particular centrally disposed. Conveying drum (36) according to claim 1 or 2, characterized in that the support surface (40) for the material strip portions (31) with an increase of 0.2 mm to 3.0 mm, preferably between 0.2 mm to 1.5 mm , is formed opposite the outer surfaces (52, 54). Conveying drum (36) according to one of claims 1 to 3, characterized in that the support body (50) in the region of the bearing surfaces (40) acted upon by negative pressure suction holes (42). Conveying drum (36) according to one of claims 1 to 4, characterized in that the support body (50) are each formed with a mold cavity. Conveying drum (36) according to one of claims 1 to 5, characterized in that the bearing surfaces (40) for the material strip portions (39) and / or the outer surfaces (52, 54) are formed with a concave curvature. Conveying drum (36) according to one of claims 1 to 6, characterized in that the conveyor drum (36) as a cutting drum (36) of a covering device of a machine (F) of the tobacco-processing industry, in particular filter attachment machine (F) is formed. Seating device of a machine (F) of the tobacco processing industry, in particular a filter attachment machine (F), with a conveyor drum (36) according to one of claims 1 to 7. Machine (F) of the tobacco processing industry, in particular filter attachment machine (F), using a conveyor drum (36) according to one of claims 1 to 7.

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