DE102010003009A1 - Editing wrapping material strips - Google Patents

Abstract

The invention relates to a method for processing a wrapping material strip (14) for rod-shaped articles in the tobacco processing industry, the wrapping material strip (14) having zones in which the oxygen permeability is reduced compared to the areas of the wrapping material strip (14) outside the zones. The invention also relates to a device (10) in the tobacco processing industry for processing a wrapping material strip (14) for rod-shaped articles in the tobacco processing industry. The method according to the invention is characterized in that an edge region of the wrapping material strip (14) on which an adhesive is applied for the production of rod-shaped articles for the tobacco processing industry is mechanically embossed. The device according to the invention is characterized in that a processing device (17, 28 ', 29', 30) is provided which has an edge area of the wrapping material strip (14) to be provided with adhesive for gluing the edge area of the wrapping material strip (14) to a further edge area of the wrapping material strip (14) changed mechanically, wherein the processing device is an embossing device (33, 36).

Description

The invention relates to a method of processing a wrapping material strip for rod-shaped articles of the tobacco-processing industry, wherein the wrapping material strip has zones in which the oxygen permeability is reduced compared to the other regions of the wrapping material strip.

The invention further relates to an apparatus of the tobacco processing industry for processing such a wrapping material strip for rod-shaped articles of the tobacco-processing industry.

In some countries, it has become mandatory to produce cigarettes that automatically extinguish under certain conditions. In order to achieve this, a wrapping material or cigarette paper is used in cigarette manufacture, are applied to the at intervals of a few centimeters transverse strips, for example, 5 mm to 7 mm wide and less permeable to oxygen. Such cigarette paper is called LIP cigarette paper from the English term "Low Ignition Propensity". The tucks have the property of changing the paper structure to reduce the oxygen permeability compared to the cigarette paper otherwise used. The horizontal stripes can be applied during papermaking or by processing the finished paper. To this is on the EP 1 417 899 B1 referenced, from which also materials for the horizontal stripes are removable. The aim of processing the usual cigarette paper is to produce densified zones which have a lower oxygen permeability, so that the cigarettes with this paper on a substrate under standard conditions are likely to extinguish.

It is disadvantageous in cigarette paper processed in this way that, at least in the region of the transverse strips, that is to say in the compressed zones, the gluing process or bonding process of the cigarette paper to an adhesive seam during the wrapping of the cigarette rod is adversely affected by the cigarette paper. Thus, for example, this leads to a reduction in production speed.

It is an object of the present invention to provide a method for processing a wrapping material strip for rod-shaped articles of the tobacco processing industry with densified zones and also a corresponding device for processing the wrapping material strip, whereby it is possible in the production of rod-shaped articles of the tobacco processing industry to achieve high production speed.

This object is achieved by a method for processing a wrapping material strip for rod-shaped articles of the tobacco-processing industry, wherein the wrapping material strip has zones in which the oxygen permeability is reduced compared to other areas of the wrapping material strip outside the zones, wherein an edge region of the wrapping material strip on the Manufacture of rod-shaped articles of the tobacco-processing industry, an adhesive is applied, is mechanically changed, wherein the mechanical modification is an embossing.

It has been recognized according to the invention that a mechanical change of the edge region of the wrapping material strip, which serves for bonding, ensures that the applied adhesive from the paper at least in the zones in which the oxygen permeability is reduced at least before processing, because there are corresponding materials were applied, the adhesive is well absorbed. It has been recognized that in the area of the LIP strips, that is to say where the densified zones are provided in the wrapping material strip, there is a poor glue or adhesive absorption of the wrapping material strip. The mechanical change of the paper by embossing improves the wetting and the absorbency of the paper increases, so that corresponding adhesive can be resumed. As a result, the bond strength when closing the wrapping material strip, for example, the lining, the filter or the cigarette paper is improved. By improving the bond strength, the production speed can also be increased since the bond seam is less likely to reopen. Accordingly, the setting time can be reduced.

Preferably, the edge region is additionally processed abrasive, in particular by roughening or perforating. This can be done for example by grinding. The abrasive machining can be done before and / or after stamping.

Since, in particular, cigarette paper, filter paper and tipping paper, which is present as a wrapping material strip in the production of cigarettes or filters, is relatively thin and can thus tear easily, the processing of the edge area must be carried out with care. In particular, it should be avoided to allow reinforced tension to act on the wrapping material strip.

Preferably, by the edge region material by energy, in particular removed by laser beams. Laser beams can be generated by a laser with sufficient power and energy density, such as an excimer laser, a CO ₂ laser and / or a Nd-YAG laser, which then ablate material by ablation. A pulsed laser may be used so that the laser beams strike the wrapping material strip at a time when the densified zones or zones in which the oxygen permeability is reduced compared to the other regions of the wrapping material strip are abraded in the edge region at least partially removed. A synchronization with the wrapping material strip run can be made. For this purpose, for example, a sensor may be provided which measures the corresponding zones with reduced oxygen permeability and, depending on the speed of the wrapping material strip, a trigger signal is given to the laser.

Preferably, the removed material is sucked off, so that the removed material does not or substantially no longer occurs in the further processing process.

Preferably, the edge region is mechanically changed on a deflecting device of the wrapping material strip, in particular a deflection roller, on a straight guide, in the inlet region of a formatting device, in the format device and / or immediately before the application of adhesive. The embossing of the edge region, however, preferably takes place on a deflection device of the wrapping material strip, in particular a deflection roller, and / or on a straight path of the wrapping material strip.

If, however, preferably only an embossing of the wrapping material strip happens in the edge region, so no abrasive mechanical change is made, no pollution takes place. In this case, no removed material must be sucked off, which is preferred in manufacturing or in strand production, since less suction air is needed.

Preferably, the embossing is done after printing the wrapping material strip.

It is preferably a method for producing rod-shaped articles of the tobacco processing industry, in particular of cigarettes or filters, comprising a method according to the invention for processing a wrapping material strip provided, wherein also the mechanically modified wrapping material strip is wound around a strand, in particular a cigarette rod or filter strand, and is glued with adhesive.

Preferably, a modified by a process wrapping material strip of the tobacco processing industry is specified. Further preferably, a rod-shaped article of the tobacco processing industry is prepared by a method according to the invention.

The object is further achieved by a tobacco processing industry device for processing a wrapping material strip having zones in which the oxygen permeability is reduced compared to regions of the wrapping material strip outside the zones for rod-shaped articles of the tobacco processing industry, wherein a processing device is provided mechanically changing an edge region of the wrapping material strip to be adhesively provided for bonding the edge region of the wrapping material strip to a further edge region of the wrapping material strip, wherein the processing device is an embossing device.

In this case, the wrapping material strip is provided in particular with zones in which the oxygen permeability is reduced in comparison with the other regions of the wrapping material strip. These are, for example, LIP cigarette paper or LIP tipping paper or LIP filter wrapping paper.

Preferably, the processing device has an embossing roller engageable with the edge region of the wrapping material strip.

The embossing roller may in this case be in engagement with a counter-roller whose circumference is soft and / or elastic, in order to be able to receive the embossing structure of the embossing roller and to allow gentle embossing of the covering material strip. Alternatively, the counter-roller also has an embossed structure, which is preferably complementary to the embossing structure of the embossing roll. The embossed structure may be formed, for example, by longitudinal and / or transverse grooves. Furthermore, the embossing structure may be waffle-like. The embossed structure preferably has corresponding elevations and / or depressions in the surface of the lateral surface of the embossing roll. Thus, the embossing roller cooperates with the counter-roller, in particular the structures engage on the surface of the embossing roller and the counter-roller into one another.

The structure size in the circumferential direction or axial direction of the embossing roller and possibly the counter-roller is in the range of 0.1 mm to 1 mm. In the radial direction, the embossing pattern has a size in the range of 0.05 mm to 0.5 mm.

In addition, the wrapping material strip can also be brought into engagement with an abrasive surface.

The abrasive surface may be, for example, a ceramic coating such as Rhenolease PC 415 or PC 915. A cemented carbide coating may be provided, such as METCO 439. It may also be a knurled and hardened surface or a diamond coated surface such as D54 and D64. It can also be provided a grinding wheel. In addition, a suction device is preferably provided which sucks the removed material.

Preferably, a rounded or a straight guide surface is provided with a partially abrasive surface. In particular, preferably at least part of an upper format is formed abrasive. This is the part of the top format along which the wrapping material strip edge region is longitudinally provided with adhesive just prior to closing the wrapping material strip around a strand of the tobacco processing industry.

Preferably, a laser device is provided.

Further preferably, a wrapping material strip modified by a method according to the invention is used to produce a strand of the tobacco-processing industry.

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. It shows:

1 schematically a part of a strand machine of the tobacco processing industry with a device according to the invention.

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.

1 shows a part of a stranding machine 10 the tobacco processing industry, for example, a cigarette rod machine or a filter rod machine.

On a bobbin changer 11 are two bobbins 12 and 13 applied. From the bobbin 12 usually becomes a wrapping material strip 14 deducted. This runs over various pulleys 15 , It is a draw roller pair 16 provided, according to the wrapping material strips 14 draws. At the same time, the bobbin will 12 driven by a motor to avoid excessive tension on the wrapping material strip 14 or the cigarette paper 14 provided. The wrapping material strip or the cigarette paper 14 has zones that have a reduced oxygen permeability compared to the other cigarette paper. These zones can be made by applying additives that reduce the air permeability of the paper. These additives may be, for example, aluminum hydroxide, magnesium hydroxide, starch, pectin and / or calcium sulfate. For this purpose, for example, on the EP 1 417 899 B1 and WO 02/37991 A1 directed.

In an embodiment according to 1 The zones with reduced oxygen permeability may be in a first printing unit 37 on the wrapping material strip 14 be produced by applying a corresponding material. Alternatively, the wrapping material strip 14 already provided with appropriate zones on the reel.

It has now been recognized according to the invention that a in the format device 23 . 24 through a glue nozzle 31 applied glue is less well in these zones. For this reason, according to the invention, the edge region, which later passes through the glue nozzle 31 is glued, mechanically changed. According to the invention, the mechanical change is effected by embossing by means of an embossing roller 33 , which in this embodiment against a counter-roller 36 presses, with the wrapping material strip 14 between the embossing roll 33 and the counter roll 36 or counter-bearing roller 36 suppressed.

In addition, for example, by a partially provided with a rough surface role 17 be provided a further mechanical change. For this purpose, a surface coating on the roll 17 be provided, in particular with the edge region of the wrapping material strip 14 interacts. For example, a ceramic coating, a hard metal coating or a diamond coating of the surface can be provided, and furthermore a knurled and / or hardened surface can be provided.

The mechanical change is thereby in the role 17 produces that wrapping material strip over the surface of the roll 17 is pulled. This may be the role 17 fixed or compared to the conveying speed of the wrapping material strip 14 be slowed down. The removed material is then removed by means of the suction device 32 aspirated.

In the embodiment 1 finds in a straight guide track a corresponding mechanical change of the edge region of the wrapping material strip 14 instead of. In addition, a pressing section, not shown, may be provided with a guide surface, which may also be provided with a coating or a corresponding rough surface in a region cooperating with an edge region of the wrapping material strip. As a result, the material, in particular the zone in which the oxygen permeability is reduced, then drags off. The removed material can then be sucked off.

Alternatively or additionally, a roll, not shown, could also be used instead of the roll 17 be provided, which allows a perforation in the edge region of the wrapping material strip. The perforation could also be generated with laser beams. For the production of a perforation can, for example DE 195 03 123 A1 to get expelled.

Alternatively, a laser beam can also be used 29 through a laser 29 ' or a laser beam 28 through a laser 28 ' Use, by means of which the corresponding material is removed in the edge region of the wrapping material strip by ablation. This is done with a laser beam 28 respectively. 29 acted upon the material that has such a high energy density or performance to be able to remove corresponding material. Especially in the area of the laser beam 29 can also be a suction device 35 be provided, which sucks the removed material. The laser beam can also be used in places other than those in 1 be provided places shown. Particularly preferred is the position between the Saugstrangförderer 21 and the enema of the format device, which is the upper format 23 and the subformat 24 is formed.

After the pulley 17 becomes the wrapping material strip 14 around the rollers 18 and 19 steered and then to a roll 15 then to a format tape 22 to be put on. The format tape 22 is about the roles 25 . 26 and 27 steered and leads through the format, which is due to the upper format 23 and the subformat 24 in 1 is indicated.

Just before entering the format device 23 . 24 is according to tobacco or filter material from the Saugstrangförderer 21 on the wrapping material strip 14 stored. Subsequently, for example, a strand of circular cross-section is formed, around which the wrapping material strip is wound. In the format device 23 . 24 is applied to the not yet completely closed wrapping material strips in the edge region, for example glue through a glue nozzle. The wrapping material strip is then closed and the glue binds accordingly. Just before applying the glue can also be a grinding device 30 be provided, which processes according to the edge region of the wrapping material strip, for example, anraut. Also at this point, what can be done by the suction device 34 is indicated, the removed material is sucked off. The grinding device 30 may for example be a grinding wheel. The surface material of the grinding wheel may be like the surface material of the roller 17 be formed, so for example be a ceramic coating, a hard metal coating or a diamond coating. The surface can also be knurled and hardened.

In the context of the description of the figure was from a wrapping material strip 14 which has a coating which makes the wrapping material less permeable to oxygen and which is arranged to be internal after closing of the cigarette rod by the wrapping material strip. There may also be appropriate zones on the other side of the wrapping material strip. In this case, the components which are responsible for the partial removal of these zones or roughening of the wrapping material strip must be able to act on the wrapping material strip at other places or on the other side, as shown in the figure. This is easy to realize for the skilled person.

Subsequently to the embossing device, ie downstream of the embossing of the wrapping material strip 14 , can be a second printing unit 38 be provided, by means of which an imprint, such as a label, can be printed on the wrapping material strip. Instead of in 1 shown further devices which change the mechanical properties of the edge region of the wrapping material strip, for example by abrasion or by perforation, it can be provided that only an embossing of the edge region takes place. In this case, it is not necessary to use a suction device 32 . 34 or 35 provided. This substantially simplifies the processing of the wrapping material strip and results in a relatively costly machine of the tobacco processing industry. In addition, this does not cause further contamination of the machine.

The embossment is preferably produced in the range of approximately 2 mm to 3 mm width in the region of the glue application along the edge of the wrapping material strip, in particular of a cigarette paper. For this purpose, a roller pair is preferably provided behind a first printing unit 37 is arranged. By embossing a portion of the wrapping material strip improves the Glue absorption and thus the seam quality and process stability in the production of, for example, cigarettes or filter strands. In the context of the invention, embossing is also understood to mean embossing, sinking and freezing. The embossing can be done from one side of the wrapping material strip or from both sides. In addition, it is within the scope of the invention possible to emboss on the side on which the material is applied, which reduces the oxygen permeability. Alternatively, the embossing can be done from the other side.

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.

LIST OF REFERENCE NUMBERS

10

rod machine

11

A reel

12

reel

13

reel

14

cigarette paper

15

idler pulley

16

pair of drawing rollers

17

role

18

role

19

role

21

suction rod

22

format tape

23

upper format

24

under format

25

idler pulley

26

idler pulley

27

idler pulley

28

laser beam

28 '

laser

29

laser beam

29 '

laser

30

grinder

31

glue nozzle

32

suction device

33

embossing roller

34

suction device

35

suction device

36

backing roll

37

1st printing unit

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• EP 1417899 B1 [0003, 0031]
• WO 02/37991 A1 [0031]
• DE 19503123 A1 [0037]

Claims (9)

Method for processing a wrapping material strip ( 14 ) for rod-shaped articles of the tobacco processing industry, the wrapping material strip ( 14 ) Has zones in which the oxygen permeability compared to the areas of the wrapping material strip ( 14 ) is reduced outside the zones, characterized in that an edge region of the wrapping material strip ( 14 ) on which an adhesive is applied for the production of rod-shaped articles of the tobacco-processing industry, the mechanical modification being embossing. A method according to claim 1, characterized in that the edge region on a deflection device ( 16 . 17 ) of the wrapping material strip ( 14 ), in particular a deflection roller, and / or on a straight path of the wrapping material strip ( 14 ) (between 16 and 17 , at 33 ) is coined. A method according to claim 2, characterized in that the embossing after printing the wrapping material strip ( 14 ) happens. A method for producing rod-shaped articles of the tobacco processing industry, in particular of cigarettes or filters, comprising a method according to any one of claims 1 to 3, wherein in addition the mechanically modified wrapping material strip ( 14 ) is wound around a strand, in particular a cigarette rod or filter strand, and glued with adhesive. Wrapping material strip ( 14 ) of the tobacco processing industry, which has been processed by a method according to one of claims 1 to 3. Rod-shaped article of the tobacco processing industry produced by a method according to claim 4. Facility ( 10 ) of the tobacco-processing industry for processing a wrapping material strip ( 14 ) with zones in which the oxygen permeability compared to areas of the wrapping material strip ( 14 ) is reduced outside the zones for rod-shaped articles of the tobacco processing industry, wherein a processing device ( 17 . 28 ' . 29 ' . 30 ; 33 . 36 ) which is provided with an adhesive to be provided edge region of the wrapping material strip ( 14 ) for bonding the edge region of the wrapping material strip ( 14 ) with a further edge region of the wrapping material strip ( 14 ) mechanically changed, wherein the processing device ( 17 . 28 ' . 29 ' . 30 ; 33 . 36 ) an embossing device ( 33 . 36 ). Device according to claim 7, characterized in that the processing device ( 17 . 28 ' . 29 ' . 30 ; 33 . 36 ) one with the edge region of the wrapping material strip ( 14 ) engageable embossing roll ( 33 ). Use of a wrapping material strip modified by a method according to one of claims 1 to 4 ( 14 ) for the production of a strand of the tobacco processing industry.

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