METHOD AND SHOE FOR PRESSING SEGMENTS OF MULTI-SEGMENT FILTER
The object of the application is a method of pressing filter segments moving in a train of segments characterised in that the filter segments are pressed by means of a shoe (10, 10A, 10′, 10″), whereas between the shoe undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) and the filter segments (S), laid on a wrapper before gluing and covering the train of segments with the wrapper, compressed air is supplied by means of ducts (14, 15, 16). Furthermore, the object of the invention is a shoe (10, 10A, 10′, 10″) for pressing segments of a continuous multi-segment rod characterised in that the undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411), for pressing filter segments (S) laid on a wrapper before gluing and covering the train of segments with the wrapper, is provided with a set of nozzles (17, 17A, 19) for blowing in compressed air supplied through ducts (12, 13, 14).
The object of the invention is a method and a shoe for pressing segments of a multi-segment filter.
In the tobacco processing industry, cigarettes provided with filters are manufactured whereas the filters can be made of a single kind of material or can be composed of various materials with different physical and filtering characteristics. The filter material in a continuous form, such as acetate, is cut into rods and applied to cigarettes. In addition, filters manufactured of several concentrically arranged layers of the filter material are known. Filters having several segments of different materials are more and more frequently used in the cigarettes manufactured in present times. Machines for manufacturing multi-segment filter rods of continuous multi-segment filter rods are known in the prior art. Such machines combine the segments delivered from multiple feeding devices, whereas the segments are formed by cutting filter rods transferred for example on a drum conveyor using a cutting head provided with rotary knives. Individual segments are combined, depending on the apparatus, next to one another on a drum conveyor or one after another on a linear conveyor in order to finally form a linearly moving continuous multi-segment rod being cut into individual multi-segment rods. At the further stages of the cigarette manufacturing process the multi-segment rods are cut into individual multi-segment filters applied to individual cigarettes.
A very significant aspect of the production of filter rods of different known kinds is the quality of segment wrapping with a wrapper. The quality is determined by both the deformation of the wrapper in the region of an adhesive seam and the filling of the wrapper with the filter material. For the purpose of correct filling of the cylindrical space formed of the wrapper, the filter segments can be subject to a momentary compression.
Members for compression in the form of immovable pressing bars which heat up during the operation and lead to material damage are known in the prior art. The U.S. Pat. No. 3,716,443 disclosed an apparatus for manufacturing filter rods of a continuous filter material wherein a member for forming a continuous filter rod was used, whereas such member is cooled by means of compressed air. Due to the use of compressed air a thin layer reducing the friction between the filter material and the guiding members is formed.
A method for momentary compression of a continuous multi-segment rod by means of compressing rollers is known from the Polish patent application PL402777.
The problem to be solved by the present invention is to develop an improved apparatus and a method for compression of the filter material.
The substance of the invention is a method of pressing filter segments moving in a train of segments characterised in that the filter segments are pressed by means of a shoe, whereas between the undersurface of the shoe and the filter segments laid on a guiding wrapper, before gluing and covering a train of segments with the wrapper, compressed air is supplied by means of ducts.
Furthermore, the substance of the invention is a shoe for pressing segments of a continuous multi-segment rod characterised in that the undersurface for pressing the filter segments, laid on a guiding wrapper before gluing and covering a train of segments with the wrapper, is provided with a set of nozzles for blowing in compressed air supplied through ducts.
A shoe according to the invention is characterised in that the nozzles widen in the direction to the segments of a continuous multi-segment rod.
A shoe according to the invention is characterised in that the nozzles are situated in at least one row, linearly, in principle along the axis of the train of segments, preferably 3 to 10 nozzles in a single row.
A shoe according to the invention is characterised in that the rows of nozzles are arranged symmetrically to the axis of symmetry of the undersurface.
A shoe according to the invention is characterised in that the rows of nozzles are arranged asymmetrically to the axis of symmetry of the undersurface.
A shoe according to the invention is characterised in that its undersurface is a cylindrical surface.
A shoe according to the invention is characterised in that the radius of the cylindrical surface is 1.5 to 10 times greater than the radius of the segments, preferably 2 to 5 times greater.
A shoe according to the invention is characterised in that the undersurface is a flat surface.
A shoe according to the invention is characterised in that the undersurface has grooves (18) distributing compressed air.
A shoe according to the invention is characterised by being attached at an angle to the axis of the segments, in particular at an angle between 0.7° and 2°.
A shoe according to the invention is characterised in that the ducts are situated in relation to the vertical direction at an angle in the range between 0° and 30°, preferably in the range between 10° and 20°.
A shoe according to the invention is characterised in that the undersurface is situated asymmetrically to the axis of the segments.
An advantage of the solution according to the invention is the combination of two functions, namely of pressing the segments and simultaneous cooling of the surface remaining in contact with the segments being pressed.
The object of invention is shown in detail in a preferred embodiment in a drawing in which:
Claims
1. A method of pressing filter segments moving in a train of segments characterised in that
- the filter segments are pressed by means of a shoe (10, 10A, 10′, 10″), whereas between the undersurface of the shoe (11, 11A, 111, 111A, 211, 211A, 311, 411) and the filter segments (S) laid on a wrapper, before gluing and covering the train of segments with the wrapper, compressed air is supplied by means of ducts (14, 15, 16).
2. A shoe (10, 10A, 10′, 10″) for pressing segments of a continuous multi-segment rod characterised in that the undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411), for pressing filter segments (S) laid on a wrapper before gluing and covering the train of segments with the wrapper, is provided with a set of nozzles (17, 17A, 19) for blowing in compressed air supplied through ducts (12, 13, 14), and the nozzles (17A) widen in the direction to the segments (S) of the continuous multi-segment rod.
3. (canceled)
4. The Shoe as in claim 2 characterised in that the nozzles (17, 17A) are situated in at least one row, linearly, in principle along the direction of an axis (SA) of the train of segments (S), preferably 3 to 10 nozzles in a single row.
5. The shoe as in claim 2 characterised in that the rows of nozzles are arranged symmetrically in relation to the axis of symmetry of the undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411).
6. The shoe as in claim 4 characterised in that the rows of nozzles are arranged asymmetrically in relation to the axis of symmetry of the undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411).
7. The shoe as in claim 2 characterised in that its undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) is a cylindrical surface.
8. The shoe as in claim 7 characterised in that the radius (R) of the cylindrical surface is between 1.5 and 10 times greater than the radius (r) of the segments, preferably between 2 and 5 times greater.
9. The shoe as in claim 2 characterised in that the undersurface is a flat surface.
10. The shoe as in claim 2 characterised in that the undersurface has grooves (18) distributing compressed air.
11. The shoe as in claim 2 characterised in that the shoe (10, 10A, 10′, 10″) is attached at an angle to the axis (SA) of the segments, in particular at an angle between 0.7° and 2°.
12. The shoe as in claim 2 characterised in that the ducts (14, 15, 16) are situated relative to the vertical direction (V) at an angle (β) in the range between 0° and 30°, preferably in the range between 10° and 20°.
13. The shoe as in claim 2 characterised in that the undersurface (10, 10A, 10′, 10″) is situated asymmetrically to the axis of the segments (S).
14. The shoe as in claim 2 characterised in that its undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) is a cylindrical surface.
15. The shoe as in claim 4 characterised in that its undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) is a cylindrical surface.
16. The shoe as in claim 5 characterised in that its undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) is a cylindrical surface.
17. The shoe as in claim 6 characterised in that its undersurface (11, 11A, 111, 111A, 211, 211A, 311, 411) is a cylindrical surface.
18. The shoe as in claim 4 characterised in that the undersurface is a flat surface.
19. The shoe as in claim 5 characterised in that the undersurface is a flat surface.
20. The shoe as in claim 6 characterised in that the undersurface is a flat surface.
Type: Application
Filed: Jun 9, 2014
Publication Date: May 5, 2016
Inventors: Bartosz CIESLIKOWSKI (Radom), Marcin MAMERSKI (Radom), Pawel GRUSZKA (Radom)
Application Number: 14/896,798