EP2727652A1 - Application of glue to strips of material for the tobacco processing industry - Google Patents

Abstract

The device has a glue processing chamber (7) arranged at a raster roller (5). Glue (20) is removed from the glue processing chamber by using the raster roller. An external conveyor pipe (12) is attached to an internal supply pipe (13) of the glue processing chamber. The glue is delivered by the external conveyor pipe and the internal supply pipe of the glue processing chamber. A controllable or adjustable supply pump (14) is attached to the external conveyor pipe and/or a controllable or adjustable throttle (17) is arranged at the external conveyor pipe. Independent claims are also included for the following: (1) a method for applying glue on a material strip in a tobacco processing industry (2) a method for operating a glue-applying device in a tobacco processing industry.

Description

The invention relates to a method for operating a glue application device of the tobacco-processing industry for applying glue to a material strip of the tobacco-processing industry.

For the connection of cigarette filters with tobacco sticks usually tipping papers are provided, on the one hand wrap the filter on the one hand and on the other hand connect a head end of the tobacco rod with the filter with a protruding edge. The assembly of the filter with the tobacco rod is usually done by gluing, wherein on a tipping paper strip from which the tipping paper leaflets are cut, glue is applied.

From the European patent application EP-A-1 147 716 is a device for applying glue to a wrapping material or a wrapping strip of a rod-shaped article of tobacco processing Industry described. In order to create a glue pattern with glue-free areas on the wrapping strip, the device has means for interrupting the glue supply to the wrapping strip.

Another glue application device is off EP-A-0 616 854 known, wherein by means of the glue application device liquid glue, in particular in the form of a glue pattern, on a web of paper, plastic, cardboard or the like, is applied. Here, a glue from a storage chamber in an engraving receiving and the glue in an application zone in cooperation with a counter roll from the engraving on the web applying transfer roller is provided. The described glue application device is preferably part of a filter attachment machine for cigarettes. In this case, liquid glue, preferably aqueous Polyvinylacetatleim, continuously applied to a tipping paper strip, which is then cut into tipping paper leaflets for connecting tobacco rods and filter plug.

In addition, under the name TPA3000 from the company C.B. Kaymich & Co. Limited, Sheffield, UK, discloses a sizing apparatus for sizing tipping paper strips used, for example, in MAX's patent applicator type tipping machines. In this case, glue is removed from a glue reservoir by means of a rotating wheel and introduced into a glue chamber. Glue is removed from the glue chamber by means of the screen roller having the cups and applied to a tipping paper strip conveyed at a predetermined transport speed.

At high production speeds on a filter attachment machine, for example up to 20,000 cigarettes per minute, it can happen that the gluing on the tipping paper strip is insufficiently applied or that gaps or interruptions due to process-related disturbances in the gluing system form.

Based on this prior art, the present invention seeks to improve the application of glue on a wrapping strip of tobacco processing industry such that even at higher production speeds of a machine a perfect glue pattern is produced on the wrapping strip.

In a glue application apparatus of the tobacco-processing industry for applying glue on a strip of material of the tobacco processing industry by means of a preferably having wells, an anilox, wherein a glue distribution chamber is arranged on the anilox, is removed from the glue by means of the anilox roller, it is provided that a external feed line is connected to an internal supply line of the glue distribution chamber, wherein in particular glue is conveyed via the feed line and the (internal) supply line of the glue distribution chamber.

The invention is based on the idea of conveying the glue of the glue distribution chamber directly and externally, so that the glue does not come into contact with oxygen, for example in a glue bath or in an open glue reserve. In addition, there is also a simple embodiment of the glue application device, since in this case the removal of glue from a glue stock in a glue pot is no longer necessary because the glue distribution chamber, from which the glue is removed by means of the anilox roller, now continuously in the amount required in each case Glue is supplied. In addition, also the area or the environment of the anilox roller kept free of glue. Moreover, this embodiment of the glue application device has the advantage that the glue distribution chamber unused, ie fresh, glue can be conveyed.

The glue application device is preferably used on a machine of the tobacco-processing industry, in particular filter attachment machine, for example, to provide a tipping paper strip with glue. Here, a predetermined glue pattern or glue pattern is applied to the tipping paper strip. Under the rotation of the anilox glue is removed from a arranged on the anilox glue distribution chamber by recording in the empty wells of the anilox roller, wherein the anilox roller is arranged above a glue supply, so that the anilox roller and the glue supply, for example, in a glue pot or the like not in touching contact with each other.

In a further embodiment, it is further provided that a, preferably controllable or controllable, feed pump is connected to the external feed line and / or on the external feed line a, preferably controllable or controllable, throttle is arranged. This makes it possible to continuously feed fresh glue to the glue application device.

Furthermore, it is advantageous if a sensor is provided in the external conveyor line or in the internal supply line of the glue supply chamber or on a discharge line connected to the glue distribution chamber, so that in particular the delivered amount of glue depending on the measured data, in particular pressure - and / or Leimmenge, is regulated. In particular, the feed pump, for example a diaphragm pump, is connected in series with the throttle in the delivery line, wherein according to one embodiment, the throttle is a speed-dependent Supply for the Leimverteilungskammer supplied amount of glue controls.

The glue application device is advantageously further developed in that the glue distribution chamber is formed with a chamber base surface facing the anilox roller and a chamber height cross-sectional area arranged transversely, in particular vertically, with the ratio of chamber base area to chamber height cross-sectional area being greater than 1, preferably greater than or equal to 1.25 or 1.5 or 1.75 or 2 and greater. In Kaymich's known TPA3000 glue application device, the ratio of the chamber base area to the vertically formed chamber height cross-sectional area is less than or equal to 1, since the volume of the glue distribution chamber has a half-shell-shaped cross section.

By increasing the volume of the glue distribution chamber with a substantially elongate or trapezoidal cross-section in longitudinal section is achieved that during the glue application, the residence time of the wells and thus the recording time of glue is increased in the wells. In addition, it is simultaneously achieved by the larger volume of the glue distribution chamber that air bubbles that are present in the glue ascend with the introduced glue and are removed again at the top in the glue distribution chamber. This also an improved glue absorption is achieved in the wells. The chamber base area is understood to be the chamber base area which faces the anilox roller and forms the contact area with the anilox roller. Further, the chamber height sectional area is the area formed at a cross section along the width of the size distribution chamber. In particular, the chamber height cross-sectional area and the chamber base area are perpendicular to each other educated.

Moreover, in a development of the glue application device is provided that is based on the direction of rotation of the anilox glue in the inlet zone in the distribution chamber via at least one opening is introduced and / or glue in the region of the outlet zone from the glue distribution chamber via at least one outlet opening is conveyed off or is. As a result, it is achieved, for example, that the inflow of glue into the glue distribution chamber takes place from the bottom to the top in the case of an anilox roll or glue roll issuing upwards or from top to bottom in the case of an anilox roll which runs downwards. The glue distribution chamber may be arranged relative to the contact surface or areas of contact of the anilox roller and the strip of material to be glued and the conveying direction of the material strip on the front or the back or on the underside of the anilox roller.

Further, a glue application device of the type mentioned is further developed in that the glue distribution chamber is sealed at least one, preferably at both, lateral end side, wherein in particular between the end faces of the anilox roller is arranged. It is thereby achieved that the glue does not exit directly from the glue distribution chamber into a glue sump in a glue pot, but instead an excess part of the glue is held in the edge areas in order to keep the glue in the edge areas at a predetermined pre-print, whereby a good gluing or sealing is achieved Admission of glue in the edge areas of the anilox roller is achieved. Thus, glue is increasingly applied in the edge areas or in the contact area between the filter plug and the tobacco sticks to be joined to the tipping paper leaflets, whereby the connection between

Tobacco stick and filter plug is improved.

Moreover, it is within the scope of an embodiment conceivable that at the lateral end faces of the excess glue is removed from the glue distribution chamber, wherein in the discharge line, a throttle may be provided to regulate the amount conveyed off, wherein furthermore the conveyed glue continuously with fresh glue mixed again fed to an external glue supply the glue distribution chamber.

In addition, in one embodiment of the glue application device, it is advantageous if a liquid-receiving chamber is provided, wherein the chamber of the anilox roller is or is delivered to the strip of material during or during production stoppage or interruption of the glue application, so that the anilox roller can be moved by means of the liquid, in particular Water is brought into contact with the chamber or is.

In a prolonged production interruption on the machine, in which, for example, the gluing of a tipping paper strip is interrupted, a water-containing chamber is positioned on the anilox roller, so that after introducing water as liquid into the chamber, the liquid with the surface of the anilox roller in Contact is brought to prevent drying of the glue in the wells of the anilox roller. In this case, a predetermined water or liquid level is preferably formed or held in the additional chamber on the anilox roller. During the production stop or the interruption of the glue application to the strip of material or in the event of interruption of the conveyance of the material strip, the cells of the anilox roller are in contact with the liquid in the second additional chamber.

In a further development, it is further provided that the further chamber is designed to be pivotable or movable, so that is pivoted away when moving the Filteransetzmaschine of the anilox roller or is moved and remove the wells of the anilox glue from the glue distribution chamber.

In the context of the invention, it goes without saying that the glue application devices described can also have combinations of the features described according to the invention also in further embodiments.

In addition, in a method for applying glue to a strip of material of the tobacco processing industry by means of a preferably having wells, anilox roller, wherein glue is removed from a arranged on the anilox glue distribution chamber, provided that the glue distribution chamber glue via an external feed line and a to the external delivery line directly connected internal supply line of Leimverteilungskammer is conveyed.

In this case, it is further provided that the glue is conveyed to the glue distribution chamber by means of a feed pump connected to the feed line, in particular controllable or controllable, feed pump.

Furthermore, the method is characterized in that the conveyed in the delivery line amount of the glue, preferably by means of a, in particular in the delivery line or in the internal supply line and / or connected to the glue distribution chamber conveyor line, throttle, is regulated or controlled.

In addition, the method is advantageously further developed in that glue is conveyed to the glue distribution chamber via at least one inlet opening provided on the lateral outer side of the glue distribution chamber and is discharged from the glue distribution chamber via an exit opening facing away from the lateral outer side of the glue distribution chamber, preferably in the central region of the glue distribution chamber ,

This ensures that the inflow of glue to or in the glue distribution chamber from the outside inwards, so that more glue is removed in the outer region of the anilox roller and thus the contact areas between the filter plug and tobacco rod to be joined in the seam area more glue is applied, whereby the adhesion or connection between the filter plug and the tobacco rod is improved and thus more glue is applied to the tipping paper strip or tipping paper leaflets. Due to the supply and removal of the glue, a direction of flow of the glue directed from outside to outside is formed in the glue distribution chamber.

According to an advantageous embodiment, it is also provided that glue is simultaneously conveyed to the glue distribution chamber at the two lateral outer sides of the glue distribution chamber. In the middle of the glue distribution chamber, the excess glue is then removed from the glue distribution chamber.

Further, the method of applying glue to a strip of material of the tobacco processing industry by means of an anilox roller, preferably having wells, wherein glue is taken from a glue distribution chamber arranged on the anilox roller, using a previously described Glue applicator operated according to one or more of the described embodiments.

In particular, in a development of the glue application device or the method is provided to ensure a continuous supply of glue application device with glue to provide glue with a sufficient pressure and a sufficient amount, wherein in the supply or the discharge of the glue distribution chamber, a sensor is integrated, the either determined pressure or the flow rate and thus the corresponding Leimdrosseln in the supply and / or in the derivative so regulates that a sufficient supply of the anilox roller or glue roller is ensured with glue continuously.

In a further embodiment, the glue application device is further developed in that a means for friction-free pressing of the glue distribution chamber against the anilox roller or a pressure means for the glue distribution chamber are provided with a force introduction point on the glue distribution chamber. This ensures that the glue distribution chamber is pressed by a turning point in another way against the anilox roller or is pressed with a predetermined contact pressure. In an alternative embodiment, the glue application device is formed with a pressing means with a single force application point on the glue distribution chamber, so that when loading or activation of the pressing the glue distribution chamber on this single point of introduction, preferably arranged in the middle of the glue distribution chamber is pressed against the anilox roller.

In addition, a development of the glue application device is characterized in that the means for pressing the Leimverteilungskammer is formed against the anilox roller by means of a, preferably exclusive, ie single, air cylinder. In the context of the invention, it is also conceivable that corresponding springs or levers are provided instead of the compressed air cylinder, whereby a glue-free contact pressure of the glue distribution chamber against the anilox roller takes place.

The object is achieved by a method for operating a glue application device of the tobacco-processing industry for applying glue to a strip of material of the tobacco-processing industry by means of a preferably having wells, anilox roller, wherein a glue distribution chamber is arranged on the anilox roller, from the glue by means of the anilox roller With the aid of a squeegee arranged on the anilox roller, excess pickled glue is doctored off the anilox roller, the squeegee is pressed against the anilox roller with a predetermined squeegee pressure, and between the squeegee and the contact point of the squeegee with the anilox roller extending tangent a squeegee angle is formed, which is reduced by increasing the doctor blade angle of the Rakelandruck or the contact force or is increased or increased by reducing the doctor blade angle of the Rakelandruck or the contact force.

By means of the doctor blade at the exit side of the glue distribution chamber or a glue chamber, the excess glue is doctored off from the anilox roller, wherein the doctor angle is designed such that a predetermined (average) amount of glue (per unit time) is removed from the glue distribution chamber, in particular at a constant production speed a machine of the tobacco-processing industry, eg a filter attachment machine, whereby upon variation of the squeegee angle of the Rakelandruck or the pressure of the squeegee to the linear contact area the doctor blade tip or the doctoring blade is varied to the surface of the anilox roller. In particular, it is thereby possible to set a desired or predetermined amount of glue (per unit of time) to be applied to a strip of material or a tipping paper strip at a constant production speed, specifically, whereby in addition less wear occurs, ie that the abrasion of the anilox roller squeegee blade contact pressure is reduced or becomes, whereby a used squeegee for example can be used for a longer time and thus no replacement of a worn squeegee must take place during a production layer.

By adjusting the squeegee angle and the variation Rakelandrucks is also ensured that on the one hand, the wells of the anilox roller are filled evenly and also the glue pattern is applied exactly on a printed strip of material. In addition, a change system of several glue distribution chambers or glue chambers is provided with appropriately set, different squeegee angles, so that according to the desired glue pattern and the desired amount of glue applied to a strip of material by replacing a glue chamber with a squeegee, with a certain squeegee angle formed on the anilox roller can be exchanged for a different sizing chamber with a squeegee and another squeegee angle in a simple and fast way, with the use of squeegees with certain different squeegee angles, the amount of glue is changed accordingly or can be changed, which due to the Rakelandrucks little wear or ., little abrasion on the Rakelfase arises.

In particular, it has been found to be advantageous that the squeegee angle is an angle between 15 ° to 40 °, in particular between 20 ° to 40 °, more preferably between 30 ° to 35 °, is or is.

As a result, a reliable and perfect glue application is achieved even at high production speeds of a filter attachment machine (eg 20,000 cigarettes per minute), wherein advantageously the variance of the amount of glue removed (per time) at a constant doctor blade angle, in particular between 30 ° to 35 °, and a predetermined Rakelruck and different production speeds of a machine from over 5,000 to over 20,000 cigarettes per minute is minimized or is. Thus, a wide working range with respect to the production speed of a filter tufting machine at a fixed doctor blade angle between 30 ° to 35 ° is achieved at a fixed Rakelandruck so that using the glue application device and the constant blade angle and without replacing the glue application device or the glue chamber the Material strips are reliably glued at different production speeds, while also ensuring that the applied amount of glue (per time) at different production speeds of the filter attachment machine remains substantially or approximately constant. Thus, in a variation of the production speed of a machine, no exchange of the glue chamber or the glue distribution chamber with another doctor blade having a different squeegee angle must be made.

Further, in a glue application device of the tobacco processing industry for applying glue to a strip of material of the tobacco processing industry by means of a preferably having wells, anilox roller, wherein a glue distribution chamber is arranged on the anilox roll, from the glue means the screen roller is provided, provided that the glue chamber is pivotable about a pivot axis formed parallel to the axis of rotation of the anilox roller, wherein in particular the pivot axis in the, preferably linear, contact area of the doctor, in particular of the doctor blade, and with the anilox roller, runs and / or the glue chamber is pressed against the anilox roll by means of one, preferably exclusively, pressing means, wherein the pressing means is arranged on the rear side of the glue chamber facing away from the anilox roller using a ball joint between the pressing means and the back of the glue chamber, wherein in particular the force introduction point of the pressing means on the Rear of the glue chamber based on the center and / or the height of the glue chamber is formed in the middle.

At the outlet side of the glue distribution chamber or the glue chamber is arranged by means of a squeegee, in particular by means of a Rakelfase formed doctor, the wiped from the wells of the anilox excess recorded glue, wherein during the removal of glue from the glue distribution chamber due to the pivoting the Leimkammer the well evenly in the edge regions of the anilox roller are filled with glue, whereby a uniform glue pattern is formed on the material to be printed strip.

In particular, the pivot axis of the glue chamber is designed to be collinear with the linear contact area of the doctoring roller with the surface of the anilox roller along the rotational axis of the anilox roller or over the width of the anilox roller so that the glue application device is removed from the glue during operation of the glue application device on a filter attachment machine within the glue distribution chamber becomes, pressure gradients of the glue pressure in the glue distribution chamber be avoided in an automatic manner or different pressure forces and a uniform pressure of the doctor across the entire width. Also, by the use of a arranged at the center of the back of the glue chamber ball joint, which is connected to a pressing means, such as impression cylinder, the glue chamber or glue distribution chamber is pressed against the anilox roller, which due to the ball joint bearing the glue chamber this movable by a rotational degree of freedom is, which also takes place an automatic compensation of the pressure gradients of the glue pressure in the glue distribution chamber, which also pressure gradients of the glue pressure are avoided.

In addition, a use of a doctor blade in a Glimauftragungskammer the tobacco processing industry is provided, wherein the squeegee has a position marker, in particular such that the squeegee in cooperation of the position marker and with the position marker form and / or functionally complementary position mark a glue chamber of the glue application device on clearly positioned on a contact surface of the glue chamber or positionable and wherein in particular the position marking of the doctor is formed as a recess or elevation, and / or that the doctor made of metal or a metal alloy, in particular of a copper-containing alloy, preferably bronze, or a chromium-containing alloy , preferably chromium-nickel.

As a result of the trained position marking of the doctor blade interchanging the sides of a doctor is prevented because due to the intended position marking and the form and / or functionally complementary position mark of the glue chamber, the squeegee created exclusively in a single and specific way can be. For this purpose, for example, the position marking is formed outside the symmetry axes or planes of symmetry of the doctor blade. Here, the position marker may be a projection or a recess or recess or a bevel or the like. Overall, this results in a simplified handling and exact positioning of the doctor blade in the glue chamber of the glue application device, which also allows a quick change of doctor blades or doctor blades.

In addition, it is advantageous if the doctor blade is made of metal or an alloy, whereby the doctor has an increased abrasion resistance and thus a higher wear resistance. Thus, the use of a doctor blade is extended accordingly.

Moreover, the use of a doctor blade in a glue application device is characterized in that the doctor blade has a non-linear, in particular curved or kinked, doctor blade, preferably the doctor blade is arranged on a glue chamber or a glue distribution chamber on the inlet side of an anilox roller in a glue chamber or a glue distribution chamber is or will.

The fact that a glue chamber with a squeegee on the exit side of a glue distribution chamber, which has a rectilinear Rakelfase, and a squeegee with a non-linear, that is not straight, Rakelfase formed on the inlet side, the self-alignment of the glue chamber during the production operation, ie with continuous gluing of a material strip, since a contact point is formed on the entrance side of the anilox roller in cooperation with the non-linear doctoring cam, so that around the contact point or about a pivot axis through the point of contact during the production run the glue chamber aligns itself automatically.

In the context of the invention, it goes without saying that several features of the glue application device of a filter attachment machine or several features of the method described can be combined with one another.

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. 1a, 1b

jeweils eine schematische Darstellung einer Leimauftragungsvorrichtung im Längsschnitt;

Fig. 2

eine schematische Draufsicht einer Leimverteilungskammer;

Fig. 3

eine schematische Darstellung eines Teils einer Leimauftragungsvorrichtung im Längsschnitt in einer weiteren Ausgestaltung;

Fig. 4a, 4b

jeweils eine schematische Ansicht einer an einer Leimauftragungsvorrichtung verwendeten Rakel;

Fig. 5a, 5b

jeweils schematisch perspektivische Ansichten eines Leimkammerkörpers einer Leimkammer;

Fig. 6

schematisch eine Detailansicht einer eine Rasterwalze berührenden Rakel;

Fig. 7

schematisch eine perspektivische Ansicht einer an einer Rasterwalze angeordneten Leimkammer und

Fig. 8

schematisch eine perspektivische Seitenansicht einer Leimkammer einer Leimauftragungsvorrichtung der Tabak verarbeitenden Industrie.

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. 1a, 1b

in each case a schematic representation of a glue application device in longitudinal section;

Fig. 2

a schematic plan view of a glue distribution chamber;

Fig. 3

a schematic representation of a portion of a glue application device in longitudinal section in a further embodiment;

Fig. 4a, 4b

each a schematic view of a squeegee used on a glue application device;

Fig. 5a, 5b

each schematically perspective views of a glue chamber body of a glue chamber;

Fig. 6

schematically a detailed view of an anilox roller contacting doctor blade;

Fig. 7

schematically a perspective view of an anilox roller arranged glue chamber and

Fig. 8

schematically a perspective side view of a glue chamber of a glue application device of the tobacco-processing industry.

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. 1a and Fig. 1b each show in longitudinal section a glue application device, wherein in this schematic illustration several elements or parts are shown. In the context of the invention, it is possible that a glue application device can be equipped with one or more of the elements described and illustrated.

The glue application device has an arranged in a glue container 4 and rotatably driven anilox roller 5, which is driven in rotation in the direction of the arrow 6 shown. The cups of the anilox roller 5 enter a glue distribution chamber 7 of a glue chamber 3 and take up the glue introduced in the glue distribution chamber 7 and exit in the region of an upper-side scraper or squeegee 8. Subsequently The filled with glue cups are conveyed to a glue application zone 9 while rotating the anilox roller 5, through which a paper web 10 to be continuously glued is conveyed.

At the bottom of the paper web 10, a corresponding glue pattern is applied by the inclusion of glue. For safer guidance of the paper web 10 in the region of the glue application zone 9, guide rods 11 or guide rollers are provided on the upper side.

At the in Fig. 1a In the embodiment shown, the paper web 10 is conveyed in a straight line, ie without bending, in the area of the anilox roller 5 between the guide rods 11, while according to the in FIG Fig. 1b shown embodiment, the paper web with a (larger) looping on the anilox roller 5 is conveyed over, since the guide rods 11 deeper than in the embodiment according to Fig. 1a or are arranged closer to the glue container 4.

Moreover, it is conceivable within the scope of the invention that the anilox roller 5 cooperates in the region of the glue application zone 9 with a counter roller in order to apply a corresponding glue pattern to the underside of the paper web 10. After removal of glue from the wells of the anilox roller 5, the wells are again rotated to the glue distribution chamber 7.

The glue distribution chamber 7 is supplied with glue via an external feed line 12 and an internal feed line 13 to the glue distribution chamber 7. For this purpose, the delivery line 12 is connected on the input side to a feed pump 14, so that glue is conveyed from an external glue supply via the external feed line 12 into the supply line 13.

In order to achieve a controlled glue supply into the glue distribution chamber 7, a sensor 15 is arranged on or in the delivery line 12, so that the acquired measurement data are transmitted to a control device 16, corresponding to a arranged in the feed line 12 throttle 17 accordingly to regulate. As a result, a controlled and continuous filling of the glue distribution chamber 7 is achieved.

In addition, a discharge line 18 may be connected to the glue distribution chamber 7, on which in one embodiment a sensor 19 is arranged to detect the return flow of the glue. According to the amount of glue measured in the return line 18, the throttle 17, which is connected to the control device 16, adjusted accordingly.

During a production stop in which no gluing takes place, a container 21 filled with a liquid, in particular water, is delivered to the anilox roller 5, so that the cups of the anilox roller 5 are conveyed through the water bath present in the container 21 and then to the glue distribution chamber 7. This measure prevents the glue from drying during production stop or interruption.

Furthermore, in Fig. 1a as in Fig. 1b the glue distribution chamber 7 as elongated in cross-section, that is formed with a trapezoidal or trapezoidal cross-section. Here, the glue distribution chamber 7 between the points A and B, which form the end points of the glue distribution chamber 7, via one of the anilox roller 5 facing chamber base. Between the points C and D, the vertically designed chamber height cross-sectional area is formed. In the context of the invention, the ratio of formed between the points A and B chamber base area and the chamber height cross-sectional area formed between points C and D has a ratio of greater than 1, preferably greater than or equal to 1.25, 1.5, 1.75, 2 and greater, whereby the volume of the glue distribution chamber 7 compared to a halbbrund in cross section trained glue distribution chamber (according to the prior art) is increased.

How out Fig. 1a and Fig. 1b shows, in one embodiment, the glue chamber 3 is pressed against the surface of the anilox roller 5 via a centrally arranged pressing device 22. The centrally arranged pressing device 22 may be a spring or a compressed air cylinder or the like in one embodiment.

The glue chamber 3 is completely sealed in one embodiment, so that no glue from the glue chamber 3 to the sealing surfaces, the scrapers on the lateral surface of the anilox roller 5 and the radial seals on the front side of the anilox roller 5 exits.

If the glue chamber 3 is not completely sealed in a further embodiment, the glue leaving the leaks is collected in the glue container 4. In this case, the glue collected in a glue sump in the glue container 4 is advantageously emptied by means of a suction tube 26. Here, the suction pipe 26 is disposed above the surface of Leimbehältergrunds at a predetermined distance, by means of a level sensor, the level of the glue in the glue container 4 is detected, so that at a predetermined glue level of the collected glue is removed by suction from a suction pump via the suction pipe. U.U. the extracted glue is mixed with fresh glue and fed as a glue to the glue distribution chamber.

Moreover, the glue chamber 3 next to the output-side squeegee 8 may be formed with an input-side doctor. It is within the scope of the invention possible that the doctor blade are designed as a positive doctor blade or negative squeegee. In addition, several doctor blades with respect to the rotation of the anilox roller 5 can be arranged one behind the other.

Fig. 2 shows a schematic plan view of a glue distribution chamber 7, which is elongated in cross section (see. Fig. 1a . Fig. 1 b) , In the inlet region of the anilox roller 5, the glue distribution chamber 7 has on the outer sides laterally arranged lower inlet openings 23, is introduced via the glue in the glue distribution chamber 7. In the upper region, ie in the outlet region of the anilox roller 5 at the glue distribution chamber 7, an outlet opening 24 is arranged centrally, to which the return line 18 is connected. In this case, over the return line 18 excess glue from the glue distribution chamber 7 is conveyed away centrally.

Fig. 3 shows schematically a part of a glue application device in a longitudinal section in a further embodiment, wherein in particular the anilox roller 5 is shown and an embodiment with three doctor blades 27, 28, 29th

According to Fig. 1a respectively. Fig. 1b a squeegee 8 can be arranged on the output side so that the squeegee 8 is arranged at an acute angle to the tangent of the lateral surface of the anilox roller 5 in the conveying direction of the anilox roller according to arrow 6. The squeegee 8 is an output-side squeegee of the glue chamber 3. It can also be provided a corresponding input-side squeegee, which in Fig. 1a respectively. Fig. 1b On the input side of the glue chamber 3 can be arranged and according to the Fig. 1a or Fig. 1b be directed against the conveying direction of the anilox roller 5 according to the wall of the glue chamber 3 on the input side.

An alternative would be an arrangement according to Fig. 3 in which an input-side squeegee 27 and an output-side squeegee 28 are provided, the ends of which face toward the anilox roller 5. The input-side squeegee 27 is thus arranged in the conveying direction according to arrow 6 and the exit squeegee 28 counter to the conveying direction of the anilox roller 5 as indicated by arrow 6. The thus ajar to the surface of the anilox roller 5 edges of the squeegee 27 and 28 seal accordingly good and are also still relatively regardless of the internal pressure of the medium in the glue chamber 3 and can be pressed with relatively little force against the anilox roller 5.

In addition to this, in a preferred embodiment, a further squeegee 29 may be provided, which is arranged between the squeegees 27 and 28 and is arranged in the conveying direction according to arrow 6 at an acute angle to the tangent of the anilox roller 5. By the doctor 29 and the scraper 29 is particularly good glue in the grid or wells of the anilox roller 5 is pressed. The squeegee 28 scrapes the glue in the glue-free zone particularly well.

In the FIGS. 4a and 4b For example, each of a number of views of a doctor blade 30 used for glue chambers for tobacco industry glue application devices is shown. Fig. 4a shows a plan view of the back of the doctor blade 30 and 4b shows a side view of the doctor blade 30th

The doctor blade 30 has a doctor blade body 31, which has a back upper edge 32 on the upper side on the back side. In addition, the doctor blade 30 has a Rakelfase 33, which at the in Fig. 4a shown squeegee 30 is rectilinear. Between the back upper edge 32 and the doctor blade 33, the doctor blade 30 is chamfered and has a Rakelkantenfläche 34 on its back.

The doctor edge surface 34 is formed at an angle of inclination to the vertical, wherein typically the inclination angle of the doctor edge surface 34 may vary between 10 ° to 80 °.

Characterized in that the doctor blade 30 has a beveled Rakelkantenfläche 34 on the back, the front surface 35 is greater than the parallel back surface 36 of the doctor blade 30th

In Fig. 4a it can be seen that the doctor blade 30 has a recess 37 formed as a position marking in the left region of the doctor blade 30 on the underside. In general, the doctor blade 30 is made of plastic, in particular polyetheretherketone (PEEK). In a further embodiment, the doctor blade 30 is made of metal or a metal alloy, such as bronze or chrome-nickel.

In Fig. 5a, 5b are a back view ( Fig. 5a ) and a front view ( Fig. 5b ) of a glue chamber body 40 which is used to form a glue chamber on an anilox roller to form a glue application system of the tobacco processing industry.

The glue chamber body 40 is U-shaped in cross-section and comprises two outer flank members 41, 42, the ends at the front, which are delivered to an anilox roller of a glue application device, tapered ends. The flank bodies 41, 42 have on the inside obliquely outwardly inclined blade application surfaces 43, 44, on the doctor blade 30, as in Fig. 4a represented, with their back or their back surface 36, are placed. Due to the inclination of the blade application surfaces, 43, 44 are corresponding doctor angle formed in the contact region of the doctor blade with the surface of an anilox roller (see. Fig. 6 ).

How out Fig. 5b can be seen, the blade application surface 43 has a projection 45 on the left side, the shape and function complementary to the in Fig. 4a shown recess 37 of the doctor blade 30 is formed. Due to the fact that, when the doctor blade 30 is applied, the projection 45 engages in the recess 37, an exact positioning of the doctor blade 30 in an unambiguous manner on the doctor application surface 43 is achieved so that the back surface 36 (see FIG. Fig. 4a, 4b ) is applied to the doctor application surface 43. A rotation of the squeegee 30 or swapping the right and left sides and the front and back is thus not possible, so that when replacing a doctor blade to be inserted always inserted in their correct position and orientation.

On its rear side 46, the doctoring chamber body 40 has a ball joint guide 47, in which a ball joint, which is attached to a printing cylinder or other pressing means, is inserted and held. When positioning the Leimkammerkörpers 40 on an anilox roller of the printing cylinder or the pressure means is activated so that over the on the back 46 of the Leimkammerkörpers 40 force in the middle M (based on the width and the height of the Leimkammerkörpers) is exercised.

In Fig. 6 is shown in an enlarged schematic cross-sectional view of the contact area of a doctor blade 30 and the anilox roller 5. The anilox roller 5 is used according to the in Fig. 6 turned arrow turned counterclockwise.

The doctor blade 30 lies with its back on the doctor blade application surface 44 of the flank body 42 against slipping on and is with corresponding Clamped or fastened fastener. The flank body 42 terminates at its outer end in the region of the back upper edge 32 at the end of the back 36 of the doctor blade 30, so that when a glue chamber with the doctor blade 30 to the anilox roller 5, the end of the doctor blade 30 is not bent, the doctor blade 30 against the anilox roller 5 is pressed with a predetermined pressure or a predetermined force.

The doctoring lip 33 of the doctor blade 30 is in touching contact with the surface of the anilox roller 5, so that along the doctoring lip 33 a linear contact area of the doctor blade 30 or the doctoring lip 33 and the anilox roller 5 is formed perpendicular to the plane of the drawing.

In the contact region of the front surface 35 of the doctor blade 30 and the voltage applied at the point of contact of the doctor blade 33 and the anilox roller 38 a predetermined blade angle α is formed, which results from the inclination of the doctor blade application surface 44 of the flank body 42.

In particular, a squeegee angle between 30 ° to 35 °, in particular of 32.5 °, advantageous because at such a squeegee angle α, the variance of the recorded glue amount (per time) at a predetermined Rakelandruck and different production speeds of a machine (between 5,000 to 25,000 cigarettes per minute) is minimized. This means that at a set squeegee angle of 32.5 ° on the filter tipping machine with a glue application device having a squeegee assembly, both at a production speed of 5,000 cigarettes per minute and at a production speed of, for example, 20,000 cigarettes per minute and without changing the Squeegee reliably reliable glue images are applied to the paper web or the tipping paper strips, without that applied glue amounts per time at the different production speeds of the machine differ significantly, ie are different.

In Fig. 7 schematically the arrangement of a glue chamber 3 on an anilox roller 5 is shown. In this case, the glue chamber 3 has the glue chamber body 40 (cf. Fig. 5a ), which is bounded on both sides by side parts 48, 49, which also delimit the anilox roller 5 laterally.

The anilox roller 5 is driven in rotation about its axis of rotation 55. Under rotation removes the anilox roller 5 from a glue stock in the glue chamber 3 glue, wherein at the outlet of the glue-filled cup excess glue in the linear contact region of the doctor blade with the surface of the anilox roller (see. Fig. 6 ) is doctored off on the exit side.

The side parts 48, 49 have recesses 51, in which the retaining pins 52 engage laterally, the retaining pins 52 laterally, e.g. are attached to the housing in which the anilox roller 5 and the glue chamber 3 are arranged. The recesses 51 on the side parts 48, 49 are arranged such that the central axis of the retaining pins 52 collinear in the contact area or in the line of contact of the doctor blade with the surface of the anilox roller 5, so that the glue chamber 3 about the pivot axis 70 pivotable is. The pivot axis 70 is collinear with the linear contact area between the doctor blade and the surface of the anilox roller 5.

In Fig. 8 is a schematic perspective view of the doctor blade chamber 3, wherein for reasons of better representability of the marking of the right side part (see. Fig. 7 , Reference numeral 48) has been omitted.

At the exit side of the glue chamber 3, the doctor blade 30 is arranged with its rectilinear doctoring lip 33 on the doctor blade application surface 44 of the flank body 42. On the opposite inlet side of an anilox roller, a doctor blade 60, which has a non-linear doctor blade 63, is arranged on the doctor application surface 43 of the flank body 41. The non-linear doctor blade 63 has a vertex 64 in its center. Correspondingly, the contact surface 43 corresponding to the doctor 60 is also formed with a kink (not shown here).

To a glue distribution chamber (see. Fig. 1a respectively. Fig. 1b 7) and in order to secure the doctor blades 30, 60 to the doctor application surfaces 43, 44, a clamping body 62 is mounted between the flank members 41, 42 for fastening the doctor blades 30, 60, the corresponding holes for the supply and forms the removal of glue from the glue distribution chamber formed in cooperation with the anilox roller.

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.

The invention is therefore not limited in its execution to the preferred embodiments shown in the figures. Rather, a variety of variants is conceivable, which of the illustrated solution and the inventive principle also in fundamentally different embodiments use makes.

LIST OF REFERENCE NUMBERS

3

Leimkammer

4

glue container

5

anilox roller

6

arrow

7

Leimverteilungskammer

8th

doctor

9

glue-applying

10

paper web

11

guide rod

12

delivery line

13

supply line

14

pump

15

sensor

16

control device

17

throttle

18

Return line

19

sensor

20

glue

21

chamber

22

pressing device

23

inlet opening

24

outlet opening

26

suction tube

27, 28, 29

doctor

30

doctor

31

squeegee body

32

return top

33

Rakelfase

34

Squeegee edge surface

35

front surface

36

backrest

37

recess

38

tangent

40

Leimkammerkörper

41

Pommel

42

Pommel

43

Squeegee contact surface

44

Squeegee contact surface

45

head Start

46

back

47

Ball joint leadership

48

side panel

49

side panel

51

recess

52

retaining pins

55

axis of rotation

60

doctor

62

clamping bodies

63

Rakelfase

64

vertex

70

swivel axis

α

squeegee angle

A, B, C, D

Point

Claims (2)

Method for operating a glue application device of the tobacco-processing industry for applying glue (20) to a strip of material (10) of the tobacco-processing industry by means of an anilox roller (5), preferably having wells, a glue distribution chamber (7) being provided on the anilox roller (5) is arranged, is removed from the glue (20) by means of the anilox roller (5), wherein by means of a squeegee (30) arranged on the squeegee (30) excess recorded glue is doctored off the anilox roller (5), the squeegee (30) a predetermined Rakelandruck is pressed against the anilox roller (5) and wherein between the doctor blade (30) and at the contact point of the doctor blade (30) with the anilox roller (5) extending tangent (38) a doctor angle (α) is formed, wherein Enlargement of the squeegee angle (α) the rake pressure is reduced or becomes or in case of reduction of the doctor angle (α) the Rakelandruck is increased. A method according to claim 1, characterized in that as the doctor angle (α) an angle between 15 ° to 40 °, in particular between 20 ° to 40 °, more preferably between 30 ° to 35 °, is set or is.

Images