EP3509445A1 - A method and apparatus for producing a filter rod for smoking articles - Google Patents
A method and apparatus for producing a filter rod for smoking articlesInfo
- Publication number
- EP3509445A1 EP3509445A1 EP17772116.4A EP17772116A EP3509445A1 EP 3509445 A1 EP3509445 A1 EP 3509445A1 EP 17772116 A EP17772116 A EP 17772116A EP 3509445 A1 EP3509445 A1 EP 3509445A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter rod
- filter
- belt
- rod
- conveyor belts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000391 smoking effect Effects 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title claims description 20
- 239000000463 material Substances 0.000 claims abstract description 62
- 230000007704 transition Effects 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000004049 embossing Methods 0.000 claims abstract description 5
- 238000010924 continuous production Methods 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 239000011111 cardboard Substances 0.000 claims description 8
- 239000011087 paperboard Substances 0.000 claims description 8
- 239000000047 product Substances 0.000 description 8
- 239000012467 final product Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 4
- 239000000123 paper Substances 0.000 description 3
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 235000013773 glyceryl triacetate Nutrition 0.000 description 2
- 239000001087 glyceryl triacetate Substances 0.000 description 2
- 229960002622 triacetin Drugs 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0229—Filter rod forming processes
- A24D3/0233—Filter rod forming processes by means of a garniture
Definitions
- the present invention relates to methods and apparatus for continuous production of filter rods for smoking articles, of the type in which a belt conveyor system is provided for advancing a rod of filter material along a forming path, and in which said belt conveyor system comprises at least one endless belt, having an upper conveying run for conveying the filter rod.
- filter rods consisting of a filter material (typically cellulose acetate) and having no outer wrapping sheet. These filter rods are to be divided into sections of predetermined lengths to form non-wrapped cellulose acetate or "NWA" filter segments.
- NWA non-wrapped cellulose acetate
- the invention relates to a method of the type indicated at the beginning of this description, in which a filter rod is advanced along a forming path, characterized in that the aforesaid belt conveyor system comprises at least two separate conveyor belts, having respective upper conveying runs arranged one downstream of the other along said forming path and in that, in the area between the upper runs of said at least two conveyor belts, an operation is carried out that modifies the configuration and/or structure of the filter rod, such as shaping of the filter rod cross-section and/or embossing and/or marking of the surface of the filter rod and/or supplying filter material to form an outer layer of the filter rod and/or shaping of a wrapping sheet of the filter rod.
- Further examples include a drying operation or providing an additive material, such as a dye or flavoring material, for example in the form of microcapsules, or an outer coating material.
- Forming path in this description, and in the following claims, means the path that starts from the inlet of the filter rod forming channel and terminates with a cutting device that is conventionally used along the production line to divide the filter rod into pieces of pre-determined lengths.
- the material constituting the filter rod (M) is without an outer wrapping sheet.
- a further aspect of the invention which can either be adopted in addition to or alternatively to the above-mentioned solution, is directed to a method of the type indicated at the beginning of this description, in which a rod of filter material is advanced along a forming path, characterized in that the aforesaid belt conveyor system comprises at least two separate conveyor belts, having respective upper conveying runs arranged one downstream of the other along said forming path, and in that that the movement speeds of said conveyor belts are controlled according to a predetermined ratio, said predetermined ratio being selected so as to obtain a controlled axial stretching effect or a controlled axial compacting effect on the material of the filter rod, as a result of the transition from one conveyor belt to the other, so as to influence the characteristics of the obtained filter rod in the required manner.
- the Applicant has, for the first time, found that applying a double- belt conveyor system to a method for producing filter rods with no outer wrapping sheet allows control of the configuration and quality of the final product to be obtained with extremely simple and effective means.
- control of the ratio between the movement speeds of the two conveyor belts is exploited to modify the configuration and/or structure of the filter rod. If the downstream belt is driven at a greater speed than the upstream belt, elongation of the product is obtained. If the downstream belt is driven at a lower speed than the speed of the upstream belt, compaction of the product is obtained.
- an operation is performed that modifies the configuration and/or the structure of the filter rod, such as shaping of the filter rod cross-section and/or embossing and/or marking of the filter rod surface and/or feeding of filter material to form an outer layer of the filter rod.
- transition area from one conveyor belt to the other is used to carry out any further operation on the filter rod material without having any hindrance due to the presence of the conveyor belt.
- the product quality is influenced by controlling the ratio between the speeds of the two conveyor belts and by operating on the rod material in the area interposed between the upper runs of the two conveyor belts.
- the intermediate station between the two conveyor belts involves feeding a layer of material
- the downstream belt is not associated with any wrapping sheet, so that the final rod obtained is, however, without any outer wrapping sheet.
- the method according to the invention can also be used, in particular, for producing a filter rod with a coaxial configuration structure, comprising an outer layer of filter material, without an outer wrapping sheet, and an inner body in the form of a paper or cardboard tube, or an inner body of filter material.
- the present invention also relates to the apparatus used to implement the method of the invention, according to that indicated in attached claim 6.
- FIG. 1 is a diagrammatic side view of an apparatus according to the prior art known from document US 6,932,752 B2,
- FIG. 2 is a diagrammatic perspective view of a first embodiment of the apparatus according to the invention
- FIG. 3 is a diagrammatic perspective view of a second embodiment of the apparatus according to the invention
- - Figure 4 shows an example of a filter rod with a coaxial configuration, which can also be obtained by the method and the apparatus according to the invention, and
- FIG. 5 is a diagram of the two successive operating steps provided in an embodiment of the method according to the invention, in order to produce the product of Figure 4.
- Figure 1 illustrates a diagrammatic side view of an apparatus according to the prior art known from document US 6,932,752 B2.
- This document shows an apparatus usable for producing multi-component filter rods, in which a plurality of filter segments 24 are fed in succession above a tape of wrapping paper 18, which is unwound by a reel 16 and is fed above a belt conveyor system, including a first conveyor belt 56 and a second conveyor belt 58 arranged one downstream of the other.
- the upper runs of the two endless conveyor belts 56, 58 are engaged by means of guide devices 52, 54, which wrap the upper runs of the belts and the paper sheet 18 fed above them so as to give them a U-shaped cross-section (at the guide device 52) and then a closed circular cross-section (in the second guide device 54).
- the speed of the downstream belt 58 is expected to be slightly higher than that of the upstream belt 56 in order to ensure the correct tensioning of the paper tape 18 which wraps around the filter segments 24.
- the present invention has been originated from finding that the application of a double-belt conveyor system (known only in the field of equipment for producing multi- component filter rods, of the type illustrated in Figure 1 ) to the production of filter rods with no outer wrapping sheet, opens the doors to conceiving an invention that allows, for the first time, the characteristics and the quality of the final product obtained to be influenced in an extremely simple and effective way.
- a double-belt conveyor system known only in the field of equipment for producing multi- component filter rods, of the type illustrated in Figure 1
- FIG. 2 A first example of the apparatus according to the invention is shown in Figure 2.
- This figure essentially refers to an apparatus of the type that was the subject of prior European patent EP 2 636 321 B1 by the same Applicant, the main difference being that, in this case, the belt conveyor system includes, instead of a single endless conveyor belt, two endless conveyor belts 1 , 2 arranged one downstream of the other.
- the two conveyor belts 1 , 2 have their upper runs aligned and arranged one downstream of the other, along the forming path F of a filter rod M.
- the material constituting the filter rod M is fed to the inlet of the forming channel F by means (not shown) of any known type.
- the material constituting the filter rod M is advanced through successive processing stations, which may include, for example, a station S1 for vapor insufflation, having the function of activating the hardening agent (triacetin) that was previously added to the filter material M, and subsequent stations S2, S3 for stabilizing the filter rod, of any known type.
- stations S1 for vapor insufflation having the function of activating the hardening agent (triacetin) that was previously added to the filter material M
- subsequent stations S2, S3 for stabilizing the filter rod, of any known type.
- stations S1 , S2, S3 are not provided here, since, as already indicated, these stations can be made according to any known art, and as they do not fall, taken alone, within the scope of the present invention. Furthermore, eliminating these details from the drawings makes them more readily and easily understandable.
- the upper tape of each belt meets a guide device that is configured so as to force the belt to deform laterally, in order to assume a U or O cross-section.
- a guide device that is configured so as to force the belt to deform laterally, in order to assume a U or O cross-section.
- this is implemented only for the upstream belt, which forms the filter rod, while the downstream belt can be left undeformed, with a planar configuration.
- Each endless belt is engaged on a plurality of idler rollers R and on a driving wheel P, which actuates the movement of the respective conveyor belt by means of direct frictional contact with it.
- the two driving wheels P are controlled in rotation by respective electric motors M1 , M2 (shown only diagrammatically in the drawings, and optionally including respective gear reducing units), said electric motors being, in turn, controlled by an electronic control unit E.
- a single electric drive motor could be provided with transmission devices that connect the single drive motor to the two conveyor belts, and which can be controlled by the electronic control unit.
- the rotation speeds of the motor wheels P are controlled according to a predetermined ratio, which can be different from 1 .
- This predetermined ratio is selected so as to influence the characteristics of the filter rod M in the required manner.
- the speed of the downstream belt 2 can be increased or decreased with respect to the speed of the upstream belt 1 , in order to obtain a controlled axial stretching or a controlled axial compacting of the material M constituting the filter rod.
- the upper runs of the two conveyor belts 1 , 2 are in frictional contact with the material M constituting the filter rod, they are able to influence the axial elongation or compacting of the rod during transition from one belt to the other, through the programmed control of the respective transport speeds.
- the friction between the filter rod material and the conveyor belts depends, in particular, on the area of the contact surface between the rod and each belt, and on the roughness of the contact surfaces.
- the contact area is more extended in the case in which the belt is forced to wrap partially or completely around the rod when crossing the processing stations S1 , S2, S3.
- the belt surface can be prepared with a texture that increases friction. The skilled technician can then take advantage of these arrangements to achieve the desired result.
- Figure 3 shows an embodiment where the transition area from one conveyor belt to the other can be exploited to carry out any further operation on the filter rod material that requires the absence of the obstacle due to the presence of a conveyor belt.
- embossing rollers 3 are provided, which give an embossed configuration to the surface of the filter rod.
- the presence of two separate conveyor belts makes it possible to take advantage of the transition area from one belt to the other, in order to carry out any kind of further processing, for example, shaping of the filter rod cross-section, or a marking operation, or adding flavoring material, or adding an outer layer of filter material around the filter rod.
- the provision of two separate conveyor belts therefore, also provides the possibility to influence the configuration and structure of the product by arranging product processing stations in the transition area between the upper runs of the conveyor belts.
- the intermediate station between the two conveyor belts is for feeding a layer of material
- the rod fed along the upstream conveyor belt is provided with a wrapping sheet, as long as the downstream belt is, however, not associated with any wrapping sheet, so that the final rod obtained is, in any case, without any outer wrapping sheet.
- the method according to the invention can also be used, in particular, for producing a filter rod with a coaxial configuration structure, comprising an outer layer of filter material, without an outer wrapping sheet, and an inner body in the form of a paper or cardboard tube, or an inner body of filter material.
- Figure 4 of the attached drawings shows an example of a filter rod M of this type, with a hollow inner tube T made of paper or cardboard, and an outer layer R1 of filter material, without an outer wrapping sheet.
- FIG. 5 diagrammatically shows two successive steps of the forming method of the rod M of Figure 4.
- a wrapping tape W of paper or cardboard is carried by a reel RE, and guided and wrapped around a core C to form the tube T.
- filter material is fed around the tube T to produce the outer layer R1 , without an outer wrapping sheet.
- the filter material is fed around the tube T by means of two conventional-type feed devices or jets J, which are configured to receive a cord of filter material (illustrated as a cross-section in the drawing) and to feed it with the aid of a flow of compressed air around the tube T.
- a cord of filter material illustrated as a cross-section in the drawing
- the operational steps illustrated in Figure 5 are implemented by arranging the two conveyor belts 1 and 2 in association with the two sections indicated with B1 and B2, respectively, in Figure 5. Therefore, in this case, the upstream conveyor belt 1 has its upper run that receives the tape W above it and advances it through the conventional guide device (not shown), which wraps it in order to form the tube T.
- the station with feed devices J for the filter material is arranged in the area interposed between the upper runs of the two conveyor belts 1 and 2 (similar to the one shown in Figure 3).
- the upper run of the downstream conveyor belt 2 comes into direct contact with the outer layer R1 of filter material, and advances the filter rod thus formed through the forming channel and towards the cutting station.
- the same solution could be adopted by replacing the tube T with an inner body of filter material, fed at the inlet of the forming channel and above the upper run of the conveyor belt arranged further upstream.
- the inner body of filter material may or may not have a wrapping sheet, but it is understood that this sheet is, however, covered by the outer layer of filter material.
- Also included in the present invention are a method and an apparatus which only rely on the provision of one or more product processing stations in the transition area between the upper runs of the conveyor belts, with equal speeds of the two conveyor belts.
- the electronic control unit E is programmed in any predetermined mode, depending on the characteristics of the final product to be obtained.
- the apparatus according to the invention thus enables a modification of the characteristics of the final product obtained with extremely simple, effective and inexpensive means.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102016000090857A IT201600090857A1 (en) | 2016-09-08 | 2016-09-08 | PROCEDURE AND EQUIPMENT FOR THE PRODUCTION OF A FILTER WAND FOR SMOKE ITEMS |
PCT/IB2017/055366 WO2018047075A1 (en) | 2016-09-08 | 2017-09-06 | A method and apparatus for producing a filter rod for smoking articles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3509445A1 true EP3509445A1 (en) | 2019-07-17 |
EP3509445B1 EP3509445B1 (en) | 2021-10-06 |
Family
ID=58606377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17772116.4A Revoked EP3509445B1 (en) | 2016-09-08 | 2017-09-06 | A method and apparatus for producing a filter rod for smoking articles |
Country Status (6)
Country | Link |
---|---|
US (1) | US20190246689A1 (en) |
EP (1) | EP3509445B1 (en) |
CN (1) | CN109936985A (en) |
EA (1) | EA201990545A1 (en) |
IT (1) | IT201600090857A1 (en) |
WO (1) | WO2018047075A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11119083B2 (en) | 2019-05-09 | 2021-09-14 | Rai Strategic Holdings, Inc. | Adaptor for use with non-cylindrical vapor products |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH308903A (en) * | 1952-09-09 | 1955-08-15 | Mueller Paul A | Process and machine for producing a filter rod from an aqueous fiber pulp. |
US3120690A (en) * | 1960-12-05 | 1964-02-11 | Eastman Kodak Co | Process and apparatus for preparing tobacco smoke filtering elements |
GB1128685A (en) | 1966-04-18 | 1968-10-02 | Desmond Walter Molins | Improvements in the manufacture of filter plugs |
US3377220A (en) * | 1967-06-09 | 1968-04-09 | American Filtrona Corp | Process for making stable elongated elements |
US3482488A (en) | 1968-01-12 | 1969-12-09 | Brown & Williamson Tobacco | Multiple filter manufacture |
US3533416A (en) * | 1968-05-08 | 1970-10-13 | American Filtrona Corp | Tobacco smoke filter |
US3860011A (en) * | 1973-08-27 | 1975-01-14 | Liggett & Myers Inc | Hollow filter |
US4022221A (en) | 1975-10-31 | 1977-05-10 | American Filtrona Corporation | Tobacco smoke filter |
US4291711A (en) * | 1979-03-27 | 1981-09-29 | American Filtrona Corporation | Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same |
GB8617865D0 (en) * | 1986-07-22 | 1986-08-28 | British American Tobacco Co | Making of filter rod |
WO2004002726A1 (en) * | 2002-07-01 | 2004-01-08 | Philip Morris Products Inc. | Multiple garniture belt drive system for filter rod machinery |
DE10354797A1 (en) * | 2003-11-21 | 2005-06-30 | Hauni Maschinenbau Ag | Method and device for producing a wrapping material strip-free filter strand of the tobacco processing industry |
CN1830340B (en) * | 2005-03-11 | 2011-01-26 | 吴晨晓 | High efficiency tar reducing harm reducing filter tip bar and its production equipment |
US9049887B2 (en) | 2010-03-26 | 2015-06-09 | Philip Morris Usa Inc. | Apparatus and method for loading cavities of plug space plug filter rod |
IN2014KN01649A (en) | 2012-03-05 | 2015-10-23 | Montrade S R L | |
ITUB20151932A1 (en) * | 2015-07-06 | 2017-01-06 | Gd Spa | Method and machine for making filters |
-
2016
- 2016-09-08 IT IT102016000090857A patent/IT201600090857A1/en unknown
-
2017
- 2017-09-06 CN CN201780068183.2A patent/CN109936985A/en active Pending
- 2017-09-06 EP EP17772116.4A patent/EP3509445B1/en not_active Revoked
- 2017-09-06 EA EA201990545A patent/EA201990545A1/en unknown
- 2017-09-06 US US16/331,830 patent/US20190246689A1/en not_active Abandoned
- 2017-09-06 WO PCT/IB2017/055366 patent/WO2018047075A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN109936985A (en) | 2019-06-25 |
US20190246689A1 (en) | 2019-08-15 |
EA201990545A1 (en) | 2019-07-31 |
EP3509445B1 (en) | 2021-10-06 |
WO2018047075A1 (en) | 2018-03-15 |
IT201600090857A1 (en) | 2018-03-08 |
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