WO2015022597A1

WO2015022597A1 - Method and apparatus for application of glue

Info

Publication number: WO2015022597A1
Application number: PCT/IB2014/063574
Authority: WO
Inventors: Bartosz CIEŚLIKOWSKI
Original assignee: International Tobacco Machinery Poland Sp. Z O.O.
Priority date: 2013-08-12
Filing date: 2014-07-31
Publication date: 2015-02-19
Also published as: PL405050A1; PL236002B1

Abstract

The object of the invention is a method and an apparatus for application of glue by means of a glue nozzle onto a paper wrapper for wrapping of rod-shaped articles on a manufacturing machine of the tobacco industry characterized in that during the operation of the machine the place of application of a glue path is changed relative to a lateral edge of the paper wrapper.

Description

METHOD AND APPARATUS FOR APPLICATION OF GLUE

The object of the invention is a method and an apparatus for application of glue.

In the tobacco industry, there are used machines for manufacturing filter rods used to manufacture filter cigarettes. Currently are used both filters made of a single filter material and of multiple different materials, so-called multi-segment filters. Rods containing a single kind of filter material are formed by cutting a continuous filter rod which is formed by wrapping a filter fiber strand into a wrapping paper. In the subsequent production process the rods are cut into multiple individual filters applied to cigarettes. Multi- segment rods are formed by cutting a continuous filter rod which is formed by wrapping multiple segments of different filter materials. In both cases, a rotary cutting head with knives situated on its circumference is used for the cutting. In case of multi-segment rods the rods are cut off usually by cutting through one of the segments into halves. In the subsequent production process the multi-segment rods are cut into multiple individual multi-segment filters applied to cigarettes. In a finished cigarette, the first segment is adapted to be held by the smoker in his/her mouth. It is commonly expected that during smoking this segment does not fall out of a cigarette and fall into the smoker's mouth. With regard to filters made of a single material it is also expected that it will not move relative to the wrapping paper. A commonly used method of segment fixing is to glue them to the wrapping paper. At present, the cigarette manufacturers use various filter materials as well as various filter wrapping materials. From the viewpoint of adhesive bonding of filter materials and wrapping materials, a very significant issue is the spread of the adhesive in the space between the surfaces to be glued, and the penetration of the adhesive into the structures of both the wrapping paper and the filter material. In addition, the amount of glue fed and the method of glue distribution, i.e. guiding a glue path on the surface of the wrapping material yet before joining with the filter is to be considered. A difficult problem to be solved is the selection of the shape of glue path and the glue amount when the wrapping material used is very thin of perforated. If a segment being wrapped is porous, then the glue will permeates partially into the segment and partially into the material, however, if a segment is smooth then the glue will permeate into the wrapping material, but also penetrate outside. As a result, the members in the manufacturing machines which guide a continuous multi-segment rod as well as a multi-segment rod formed by cutting the continuous rod will be contaminated with glue. The glue depositing on the members of the machine has to be removed, which makes it necessary to stop the manufacturing machine. The objective of this invention is to develop such method of application of glue which ensures a reduction of contamination of the members of the manufacturing machine.

Manufacturing machines provided with nozzles feeding the glue to fix the segments of manufactured multi- segment rods are known in the prior art. The document DE2452749 presents a manufacturing machine on which a double glue path is formed. Also the document US2012/0305014 discloses a manufacturing machine on which glue paths for segment fixing are made. The solutions presented above do not solve the problem of machine contamination in case of the necessity to use segments with a porous surface structure and the segments with a smooth surface structure and at the same time a thin porous wrapping paper.

The object of the invention is a method of application of glue by means of a glue nozzle onto a wrapping paper for wrapping of rod-shaped articles on a manufacturing machine of the tobacco industry characterized in that during the operation of the machine the place of application of a glue path is shifted relative to a lateral edge of the paper wrapper.

Furthermore, a method according to the invention is characterized in that the place of application of the glue path is shifted by changing the position of a glue nozzle.

A method according to the invention characterized in that the applied glue paths are linear sections parallel to the lateral edge of the paper wrapper.

Furthermore, a method according to the invention is characterized in that a successive shift of the place of application of the glue path is greater than the width of the glue path.

Furthermore, a method according to the invention is characterized in that the distance between a successive position of the glue path and a present position of the glue path is different from the distance between the present position of the glue path and the previous position of the glue path.

A method according to the invention is characterized in that the place of application of the glue path is shifted in a continuous way.

A method according to the invention is characterized in that the applied glue paths are linear sections inclined relative to the lateral edge of the paper wrapper. A method of the invention is characterized in that the applied paths have a sinusoidal course.

Furthermore, a method according to the invention is characterized in that the place of application of the glue path is shifted at specific intervals. Furthermore, a method according to the invention is characterized in that the position of a glue nozzle is shifted at half-minute intervals.

The substance of the invention is also an apparatus for the application of glue by means of a glue nozzle onto a paper wrapper for the wrapping of rod-shaped articles on a manufacturing machine of the tobacco industry, characterized by comprising a nozzle of a glue applying system which is adapted to apply a glue path at different places relative to a lateral edge of the paper wrapper.

Furthermore, an apparatus according to the invention is characterized in that the nozzle changes its position relative to the lateral edge of the paper wrapper.

Furthermore, an apparatus according to the invention is characterized in that the nozzle changes its inclination relative to the surface of the paper wrapper.

Due to the application of a method according to the invention the contamination caused by the permeating of the glue will appear at different places of the members of the machine designed for guiding of the articles. Due to the fact that the points of contamination appearing at different places will not be dried, they will be removed by moving articles. The application of a method according to the invention results in a reduction of production waste. At the same time, the efficiency of the manufacturing machine is increased by reducing the machine's shutdown time.

The developed method according to the invention was presented in detail in a preferred embodiment in a drawing in which:

Fig. 1 shows a fragment of a production machine for manufacturing of multi-segment rods;

Fig. 1 a shows a fragment of an apparatus according to the invention with a nozzle adapted to changing its position.

Fig. 1 b shows a fragment of an apparatus according to the invention with a nozzle adapted to changing of its inclination relative to the surface of a paper wrapper.

Fig. 2 shows a continuous multi-segment rod placed onto a paper wrapper on a manufacturing machine;

Fig. 3 shows a paper wrapper with a glue path applied;

Fig. 4 shows a paper wrapper with a different glue path applied;

Fig. 5 shows a paper wrapper with another glue path applied;

Fig. 6 shows an individual multi-segment filter to be applied to a cigarette. Fig. 1 shows a fragment of a machine for manufacturing of multi-segment rods. Rod-shaped segments 1 are fed onto a paper wrapper 2 from any not shown segment feeding apparatus. For example, a member directly placing the segments 1 onto a paper wrapper can be a delivery wheel 3. A machine for manufacturing of multi-segment rods is provided with a conveyor 5 on which the paper wrapper 2 moves together with the tape 6. The segments 1 are fixed relative to the paper wrapper 2 by means of glue. A nozzle 4 is used to feed the glue onto the paper wrapper before placing the segments on it. After wrapping the segments 1 into the paper wrapper 2 and sealing the paper wrapper a continuous multi-segment rod is formed, which is cut into individual multi-segment rods 7 by means of a cutting head 8 provided with knives 9. Fig. 1 a shows a fragment of an apparatus according to the invention in a view A marked in Fig. 1 , namely a glue nozzle 4 whose position relative to an edge 15 of the paper wrapper 2 is changed by means of a drive member 20. A drive member 20 may be any known mechanical, electromagnetic or pneumatic actuator which can take multiple positions. A change of position of the nozzle 4 will entail a change of position of the glue path 14 situated at a distance e from the edge 15. Fig. 1 b shows a fragment of an apparatus according to the invention in a view A marked in Fig. 1 , comprising a glue nozzle 4 which is designed as a rotary nozzle. The nozzle 4 is driven by a drive member 20, the nozzle 4 can rotate around the axis of rotation 21 changing the angle a to the surface of the paper wrapper 2. A change of angular position of the nozzle 4 will entail a change of position of the glue path 14 situated at a distance e from the edge 15. Fig. 2 shows a train of segments 11 , 12 and 13, put alternately on a manufacturing machine, which are wrapped into a paper wrapper 2, whereas the segments are shown in a section. For example, the segment 11 has a porous outer surface into which the glue permeates easily, whereas the segments 12 and 13 have a smooth paper surface into which the glue permeates with more difficulty than in case of the segments 11. Fig. 3 shows a paper wrapper 2 onto which a train of segments of Fig. 2 is placed, whereas the paper wrapper has a glue path 14 applied. The glue path 14 is applied by means of a nozzle 4 which makes movements in the direction of the plane of the drawing in Fig. 1 or changes its angular position relative to the plane of the drawing, whereas the nozzle 4 can work in contact or without contact with the paper wrapper 2, whereas the applied sections of the glue path 14 are linear sections parallel to the lateral edge 15 of the paper wrapper 2. Fig. 3 shows a glue path 14 for several shifts of the nozzle 4 relative to the edge 15 of the paper wrapper 2, whereas each shift is greater than the width of the glue path 14. The first shift is made with the relocation d1 by changing the distance e1 from the edge 15 to e2, a next shift is made with the relocation d2 by changing the distance from e2 to e3, a successive shift is made with the relocation d3 by changing the distance from e2 to e3. In addition, the relocation d2 is smaller than d1 , and the relocation d3 is smaller than d2. It is possible to make any changes of position of the nozzle 4 at any, for example half-minute, intervals. Methods of application of glue where the place of application of glue changes in a continuous way are also possible. Fig. 4 shows a glue path 14' which is formed by continuous changing of position of the glue nozzle 4 relative to the lateral edge 15. The applied sections of the glue path 14' are linear sections inclined relative to the lateral edge 15 at the angle β so that a so-called triangular course of the glue path 14' is achieved. The turning points are situated at the distances e10, e11 and e12, whereas the distances e10 and e12 may have different values. If the distances e10 and e12 are equal to each other, a symmetrical course of the path is achieved. Fig. 5, in turn, shows a glue path 14" which has a sinusoidal course. For the extreme positions of the glue nozzle the points of inflexion of the course at the distances e20, e21 and e22 are achieved, whereas the distances e20 and e22 are usually equal to each other.

Multi-segment rods 7 are cut into sections constituting filters applied to cigarettes. Fig. 6 shows a section of a finished individual multi-segment filter which is formed of the segments 11 , 12 and 13. The segment 12 is not cut, the segment 11 A is formed by cutting the segment 11 into halves, and similarly the segment 13A is formed by cutting the segment 13 into halves. A glue path 14 is situated between the paper wrapper 2 and the segments 11 A, 12 and 13A.

Claims

Patent claims

1. A method of application of glue by means of a glue nozzle onto a paper wrapper for wrapping of rod-shaped articles on a manufacturing machine of the tobacco industry, characterized in that during the operation of the machine the place of application of a glue path is shifted relative to a lateral edge of the paper wrapper.

2. A method as in claim 1 characterized in that the place of application of the glue path is shifted by changing the position of the glue nozzle.

3. A method as in claim 1 characterized in that the applied glue paths are linear sections parallel to the lateral edge of the paper wrapper.

4. A method as in claim 3 characterized in that a successive shift of the place of application of the glue path is greater than the width of the glue path.

5. A method as in claim 3 or 4 characterized in that the distance between a successive position of the glue path and a present position of the glue path is different from the distance between the present position of the glue path and the previous position of the glue path.

6. A method as in claim 1 characterized in that the place of application of the glue path is shifted in a continuous way.

7. A method as in claim 6 characterized in that the applied glue paths are linear sections inclined relative to the lateral edge of the paper wrapper.

8. A method as in claim 6 characterized in that the applied paths have a sinusoidal course.

9. A method as in any of the preceding claims characterized in that the place of application of the glue path is shifted at specific intervals.

10. A method as in claim 9 characterized in that the position of the glue nozzle is shifted at half- minute intervals.

11. An apparatus for the application of glue by means of a glue nozzle onto a paper wrapper for wrapping of rod-shaped articles on a manufacturing machine of the tobacco industry, characterized by comprising a nozzle of a glue applying system which is adapted to apply a glue path at different places relative to a lateral edge of the paper wrapper.

12. An apparatus as in claim 11 characterized in that the nozzle changes its position relative to the lateral edge of the paper wrapper.

13. An apparatus as in claim 11 or 12 characterized in that the nozzle changes its inclination relative to the surface of the paper wrapper.