WO2013002657A1 - Guide jacket for filter segments - Google Patents

Guide jacket for filter segments Download PDF

Info

Publication number
WO2013002657A1
WO2013002657A1 PCT/PL2012/050018 PL2012050018W WO2013002657A1 WO 2013002657 A1 WO2013002657 A1 WO 2013002657A1 PL 2012050018 W PL2012050018 W PL 2012050018W WO 2013002657 A1 WO2013002657 A1 WO 2013002657A1
Authority
WO
WIPO (PCT)
Prior art keywords
jacket
filter
guiding
segments
circular knives
Prior art date
Application number
PCT/PL2012/050018
Other languages
French (fr)
Inventor
Andrzej BOLESŁAWSKI
Original Assignee
International Tobacco Machinery Poland Sp. Z O.O.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Tobacco Machinery Poland Sp. Z O.O. filed Critical International Tobacco Machinery Poland Sp. Z O.O.
Publication of WO2013002657A1 publication Critical patent/WO2013002657A1/en

Links

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
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0254—Cutting means

Definitions

  • the object of the application is a guide jacket for filter segments for the apparatus for feeding sets of filter segments of the tobacco industry.
  • segment feeding apparatuses for feeding sets of filter segments, where one set of segments is formed by cutting one filter rod conveyed on a drum conveyor using a cutting head provided with circular knives.
  • segment feeders are provided with arched rod guides the function of which is to hold and guide the rods along an arched guiding path, before cutting, during cutting of the rods as well as to guide cut filter segments, whereas as many guides are used as many segments a filter segment is cut into.
  • the guides of this type are known from GB 1 029 127 A and GB 1 043 706 A.
  • the GB 1 029 127 A publication disclosed multiple situated parallel to each other segment guides, whereas circular knives together with the elements fastening the knives are situated in spaces between adjoining guides, and the width of a guide in the embodiment corresponds at most to a half of the segments' length.
  • the filter segments are fastened and adjusted independently from each other, what is time-consuming, and in addition creates the risk that differences in the adjustment of guides for particular segments of the set of segments may exist. Furthermore, the length of the filter segments is several times greater than the width of the guide, which causes an increase of unit pressures on the lateral segment surface and can lead to segment damage.
  • the problem solved by the invention is to avoid the abovementioned drawbacks, in particular to eliminate the unit pressures on lateral surfaces of a filter rod segment.
  • the object of the invention is also to shorten the time of replacement of the guiding elements and to simplify the system assembly, adjustment and maintenance.
  • the object of the invention is a jacket guiding filter rods for an apparatus for feeding filter segments provided with a drum conveyor having flutes for crosswise transferring filter rods and a cutting head having a plurality of circular knives mounted in a housing of the head, characterized in that it has a uniform principally cylindrical surface guiding filter rods and, in addition, having a plurality of slots for circular knives of the cutting head.
  • a jacket according to the invention is characterized in that the outer surface of the jacket has depressions formed for the elements fastening the circular knives.
  • a jacket according to the invention is characterized in that the depressions formed are cylindrical.
  • a jacket according to the invention is characterized in that in the outer surface of the jacket the depressions for spacers between the circular knives are formed.
  • a jacket according to the invention is characterized in that the depressions formed are as cylindrical.
  • a guiding jacket according to the invention replacing multiple single guides permits shortening the assembly time of the apparatus for feeding sets of segments.
  • a filter rod, and then cut segments are guided at their maximum possible length because the sections in the jacket have a width only slightly greater than the thickness of the knives what results in that the unit pressures on the surface of the rods and the segments are reduced, which is very significant for the quality of fed filter segments, especially when rods made of a hard, brittle material are cut.
  • the rigid construction of the jacket ensures that during the operation of the apparatus no risk of its deformation or damage exists, e.g. in case of filter rod jamming.
  • a guiding jacket according to the invention shortens the time of replacement of the guiding elements and simplifies the system assembly, adjustment and maintenance.
  • the object of the invention is shown in a preferred embodiment in a drawing in which:
  • Fig. 1 - shows a view of an apparatus for feeding sets of filter segments
  • Fig. 2 - a perspective view of a cutting head with two knife shafts
  • Fig. 3 - a perspective view of the cutting head of Fig. 2 with a guiding jacket
  • Fig. 3a - a perspective view of the guiding jacket of Fig. 3,
  • Fig. 4 - a knife unit and a cross-section of a guiding jacket
  • Fig. 5 - a knife unit and a cross-section of guides known from the state of the art
  • Fig. 6 - a guiding jacket in a view from the side of the drum conveyor
  • Fig. 7 - a guiding jacket in a view from the side of the cutting head.
  • Fig. 1 shows an apparatus for feeding sets of filter segments provided with a hopper 1 for filter rods 2 fastened to a main plate 3.
  • the filter rods 2 are conveyed crosswise to their axes in accordance with the direction of rotation of the drum conveyor marked with an arrow, along an arched guiding path 12 situated between the drum conveyor 4 and an inner principally cylindrical guiding surface 14 of a guiding jacket 13.
  • the filter rods 2 are cut into segments by circular knives 6 attached to knife shafts 7 mounted in a housing 8 of a cutting head 9, whereas during the operation the circular knives 6 are pushed into slots formed in the jacket 13 and into peripheral grooves formed in the drum conveyor 4.
  • the cutting head 9 is provided with one of more sets of circular knives 6 attached to the knife shafts 7.
  • the knife shaft 7 with knives 6, distance sleeves, distance pieces and bearings will be referred to as a knife unit 10.
  • the rotation axis X of the knife unit 10 is situated at the outer surface 15 of the jacket 13 in order to make pushing the circular knife 6 above the guiding surface 14 and consequently cutting of a filter rod 2 possible.
  • a set of filter segments 11 formed by cutting a filter rod 2 is picked up usually in the lowest position of the flute 5 at the drum conveyor 4.
  • Fig. 2 shows a cutting head 9 provided with a plurality of knives 6 attached to two knife units 10.
  • the unit 10 is disposed in a housing 8 in positioning pockets 18 and 19.
  • the connecting elements fastening the knife unit 10 to the housing 8 have been omitted in the drawing.
  • the head 9 shown in Fig. 2 can be provided with one more knife unit 10.
  • Fig. 3 shows a cutting head presented in Fig. 2, whereas the knives 6 of the units 10 are pushed into slots 20 of a guiding jacket 13.
  • the guiding jacket 13 itself having the slots 20 has been shown in Fig. 3a.
  • Fig. 4 shows a knife unit 10 with knives 6 which are attached by means of fastening elements 21 situated between spacers 22.
  • a jacket 13 in a cross-section which plane passes through the rotation axis X of the knife unit 10 is also shown.
  • depressions 23 and 24 are formed, the purpose of which is to make pushing of the knife unit 10 close to the outer surface 15 of the jacket 13 possible so that the blades of the circular knives 6 protrude at an appropriate distance beyond an inner guiding surface 14 in order to make cutting of filter rods 2 possible.
  • the depression 23 is adjusted to the shape and the dimensions of spacers 22, whereas the depression 24 is adjusted to the shape and the dimensions of the fastening elements 21.
  • Fig. 5 shows a solution known from the state of the art in which cut segments of a filter rod 2 are guided by separate independent guides 30.
  • Fig. 6 shows a guiding jacket 13, adapted to the cooperation with two knife units 10, presented from the side of a drum conveyor 4.
  • a plurality of longitudinal slots 20 with a width slightly greater than the thickness of a circular knife 6 are formed, where the said width allows inserting the knife 6 into the slot 20.
  • the position of the knife units 10 relative to the guiding jacket 13 is indicated by shown rotation axes X of the said units.
  • Fig. 7 shows the same guiding jacket 13 from the side of a cutting head 9.
  • Depressions 24 corresponding to fastening elements 21 are formed in this embodiment as cylindrical depressions.
  • depressions 23 corresponding to spacers 22 are cylindrical. In practice, other shapes of the depressions 23 and 24 are also possible.
  • a jacket 13 can be also formed as a thin-walled element without depressions for spacers and circular knife fastening elements while maintaining its essential function of guiding filter rods and segments at the greatest possible length of their lateral surface.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

The object of the application is a jacket guiding filter segments to an apparatus for feeding filter segments provided with a drum conveyor having flutes for the crosswise transfer of filter rod sand a cutting head having a plurality of circular knives fastened in the housing of the head, characterized by having a uniform generally cylindrical surface guiding the filter rods and, in addition, having a plurality of slots for the circular knives of the cutting head.

Description

Guide jacket for filter segments
The object of the application is a guide jacket for filter segments for the apparatus for feeding sets of filter segments of the tobacco industry.
In machines manufacturing multi-segment filters used in cigarettes, there is a need of feeding multiple different filter segments from multiple feeding apparatuses. Among known segment feeding apparatuses are apparatuses for feeding sets of filter segments, where one set of segments is formed by cutting one filter rod conveyed on a drum conveyor using a cutting head provided with circular knives. Known segment feeders are provided with arched rod guides the function of which is to hold and guide the rods along an arched guiding path, before cutting, during cutting of the rods as well as to guide cut filter segments, whereas as many guides are used as many segments a filter segment is cut into. The guides of this type are known from GB 1 029 127 A and GB 1 043 706 A.
The GB 1 029 127 A publication disclosed multiple situated parallel to each other segment guides, whereas circular knives together with the elements fastening the knives are situated in spaces between adjoining guides, and the width of a guide in the embodiment corresponds at most to a half of the segments' length.
Similar guides with a similar proportion of the guide length to the segment length was disclosed in the GB 1 043 706 A publication.
They are fastened and adjusted independently from each other, what is time-consuming, and in addition creates the risk that differences in the adjustment of guides for particular segments of the set of segments may exist. Furthermore, the length of the filter segments is several times greater than the width of the guide, which causes an increase of unit pressures on the lateral segment surface and can lead to segment damage.
The problem solved by the invention is to avoid the abovementioned drawbacks, in particular to eliminate the unit pressures on lateral surfaces of a filter rod segment. The object of the invention is also to shorten the time of replacement of the guiding elements and to simplify the system assembly, adjustment and maintenance.
The object of the invention is a jacket guiding filter rods for an apparatus for feeding filter segments provided with a drum conveyor having flutes for crosswise transferring filter rods and a cutting head having a plurality of circular knives mounted in a housing of the head, characterized in that it has a uniform principally cylindrical surface guiding filter rods and, in addition, having a plurality of slots for circular knives of the cutting head.
Preferably a jacket according to the invention is characterized in that the outer surface of the jacket has depressions formed for the elements fastening the circular knives.
Preferably a jacket according to the invention is characterized in that the depressions formed are cylindrical.
Preferably a jacket according to the invention is characterized in that in the outer surface of the jacket the depressions for spacers between the circular knives are formed.
Preferably a jacket according to the invention is characterized in that the depressions formed are as cylindrical.
A guiding jacket according to the invention replacing multiple single guides permits shortening the assembly time of the apparatus for feeding sets of segments. A filter rod, and then cut segments are guided at their maximum possible length because the sections in the jacket have a width only slightly greater than the thickness of the knives what results in that the unit pressures on the surface of the rods and the segments are reduced, which is very significant for the quality of fed filter segments, especially when rods made of a hard, brittle material are cut. The rigid construction of the jacket ensures that during the operation of the apparatus no risk of its deformation or damage exists, e.g. in case of filter rod jamming.
A guiding jacket according to the invention shortens the time of replacement of the guiding elements and simplifies the system assembly, adjustment and maintenance. The object of the invention is shown in a preferred embodiment in a drawing in which:
Fig. 1 - shows a view of an apparatus for feeding sets of filter segments,
Fig. 2 - a perspective view of a cutting head with two knife shafts,
Fig. 3 - a perspective view of the cutting head of Fig. 2 with a guiding jacket,
Fig. 3a - a perspective view of the guiding jacket of Fig. 3,
Fig. 4 - a knife unit and a cross-section of a guiding jacket,
Fig. 5 - a knife unit and a cross-section of guides known from the state of the art,
Fig. 6 - a guiding jacket in a view from the side of the drum conveyor,
Fig. 7 - a guiding jacket in a view from the side of the cutting head.
Fig. 1 shows an apparatus for feeding sets of filter segments provided with a hopper 1 for filter rods 2 fastened to a main plate 3. Beneath the hopper 1 there is a drum conveyor 4 provided with a plurality of flutes 5 on the circumference into which the filter rods 2 from the hopper 1 are inserted and in which the said rods are conveyed. The filter rods 2 are conveyed crosswise to their axes in accordance with the direction of rotation of the drum conveyor marked with an arrow, along an arched guiding path 12 situated between the drum conveyor 4 and an inner principally cylindrical guiding surface 14 of a guiding jacket 13. During the movement along the guiding path 12 the filter rods 2 are cut into segments by circular knives 6 attached to knife shafts 7 mounted in a housing 8 of a cutting head 9, whereas during the operation the circular knives 6 are pushed into slots formed in the jacket 13 and into peripheral grooves formed in the drum conveyor 4. Depending on the quantity of filter segments into which the filter rods 2 are cut, the cutting head 9 is provided with one of more sets of circular knives 6 attached to the knife shafts 7. Hereinafter, the knife shaft 7 with knives 6, distance sleeves, distance pieces and bearings will be referred to as a knife unit 10. The rotation axis X of the knife unit 10 is situated at the outer surface 15 of the jacket 13 in order to make pushing the circular knife 6 above the guiding surface 14 and consequently cutting of a filter rod 2 possible. A set of filter segments 11 formed by cutting a filter rod 2 is picked up usually in the lowest position of the flute 5 at the drum conveyor 4.
Fig. 2 shows a cutting head 9 provided with a plurality of knives 6 attached to two knife units 10. The unit 10 is disposed in a housing 8 in positioning pockets 18 and 19. For reasons of simplification, the connecting elements fastening the knife unit 10 to the housing 8 have been omitted in the drawing. The head 9 shown in Fig. 2 can be provided with one more knife unit 10. Fig. 3 shows a cutting head presented in Fig. 2, whereas the knives 6 of the units 10 are pushed into slots 20 of a guiding jacket 13. For reasons of simplification the fastening elements of the guiding jacket 13 have not been shown. The guiding jacket 13 itself having the slots 20 has been shown in Fig. 3a.
Fig. 4 shows a knife unit 10 with knives 6 which are attached by means of fastening elements 21 situated between spacers 22. A jacket 13 in a cross-section which plane passes through the rotation axis X of the knife unit 10 is also shown. In an outer surface 15 of the jacket 13 depressions 23 and 24 are formed, the purpose of which is to make pushing of the knife unit 10 close to the outer surface 15 of the jacket 13 possible so that the blades of the circular knives 6 protrude at an appropriate distance beyond an inner guiding surface 14 in order to make cutting of filter rods 2 possible. The depression 23 is adjusted to the shape and the dimensions of spacers 22, whereas the depression 24 is adjusted to the shape and the dimensions of the fastening elements 21. For comparison, Fig. 5 shows a solution known from the state of the art in which cut segments of a filter rod 2 are guided by separate independent guides 30.
Fig. 6 shows a guiding jacket 13, adapted to the cooperation with two knife units 10, presented from the side of a drum conveyor 4. In the jacket 13, a plurality of longitudinal slots 20 with a width slightly greater than the thickness of a circular knife 6 are formed, where the said width allows inserting the knife 6 into the slot 20. The position of the knife units 10 relative to the guiding jacket 13 is indicated by shown rotation axes X of the said units. Fig. 7 shows the same guiding jacket 13 from the side of a cutting head 9. Depressions 24 corresponding to fastening elements 21 are formed in this embodiment as cylindrical depressions. Similarly, depressions 23 corresponding to spacers 22 are cylindrical. In practice, other shapes of the depressions 23 and 24 are also possible.
A jacket 13 can be also formed as a thin-walled element without depressions for spacers and circular knife fastening elements while maintaining its essential function of guiding filter rods and segments at the greatest possible length of their lateral surface.

Claims

Patent claims
1. A guide jacket for filter segments for an apparatus for feeding filter segments provided with a drum conveyor having flutes for crosswise transferring filter rods and a cutting head having a plurality of circular knives mounted in the housing of the head, characterized in that
it has a uniform generally cylindrical surface (14) guiding filter rods (2), and moreover
it has a plurality of slots (20) for circular knives (6) of the cutting head (9).
A jacket as in claim 1 , characterized in that an outer surface (15) of a jacket (13) has depressions (24) formed for elements (21) fastening the circular knives (6).
A jacket as in claim 2, characterized in that the depressions (24) are formed as cylindrical. A jacket as in claim 1 , characterized in that the outer surface (15) of the jacket (13) has depressions (23) formed for spacers (22) between the circular knives (6).
A jacket as in claim 4, characterized in that the depressions (23) are formed as cylindrical.
PCT/PL2012/050018 2011-06-30 2012-06-06 Guide jacket for filter segments WO2013002657A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP.395519 2011-06-30
PL395519A PL395519A1 (en) 2011-06-30 2011-06-30 Filter segments driving by mantle

Publications (1)

Publication Number Publication Date
WO2013002657A1 true WO2013002657A1 (en) 2013-01-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2012/050018 WO2013002657A1 (en) 2011-06-30 2012-06-06 Guide jacket for filter segments

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PL (1) PL395519A1 (en)
WO (1) WO2013002657A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20130234A1 (en) * 2013-05-21 2014-11-22 Gd Spa SUPPLY DEVICE FOR FILTER ROPES OF AN AUTOMATIC TOBACCO INDUSTRY MACHINE.
EP2666373A3 (en) * 2012-05-23 2015-09-23 HAUNI Maschinenbau AG Device for cutting filter rods
CN105533798A (en) * 2016-02-26 2016-05-04 厦门烟草工业有限责任公司 Double-length filter tip section removing device and cigarette making and plug assembling machine
CN106535669A (en) * 2014-04-14 2017-03-22 奥驰亚客户服务有限责任公司 Rotatable drum and method and system using the same for the automated production of e-vapor devices
WO2017068493A1 (en) * 2015-10-19 2017-04-27 G.D S.P.A. Machine for making smokers' articles
IT201600094846A1 (en) * 2016-09-21 2018-03-21 Gd Spa Device for cutting rods of filtering material of multiple length and units for feeding sections of filtering material provided with said device.
US9968131B2 (en) 2014-10-16 2018-05-15 Altria Client Services Llc Assembly drum and system and method using the same for the automated production of e-vapor devices
US10858137B2 (en) 2014-12-19 2020-12-08 Altria Client Services Llc System and method for applying a label for the automated production of e-vapor devices
US11576440B2 (en) 2014-04-14 2023-02-14 Altria Client Services Llc Method and system for the automated production of e-vapor devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL230013B1 (en) 2013-02-06 2018-09-28 Int Tobacco Machinery Poland Spolka Z Ograniczona Odpowiedzialnoscia Method and apparatus for cutting the filtering materials

Citations (7)

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US3058475A (en) * 1959-12-28 1962-10-16 American Mach & Foundry Cigarette making machine
US3067644A (en) * 1958-04-22 1962-12-11 American Mach & Foundry Mouthpiece feed
US3081778A (en) * 1961-01-16 1963-03-19 American Mach & Foundry Method of making a cigarette having a composite filter plug
GB1029127A (en) 1964-04-06 1966-05-11 Tom Rowlands Improvements in or relating to the manufacture of mouthpiece cigarettes
GB1043706A (en) 1962-07-06 1966-09-21 Jan Antoni Rakowicz Improvements in or relating to cutting apparatus for mouthpiece rods
DE1258318B (en) * 1957-08-05 1968-01-04 Olin Mathieson Device for the production of multiple filters for cigarettes or the like.
EP0383970A1 (en) * 1987-11-18 1990-08-29 Japan Tobacco Inc. Apparatus for manufacturing cigarette filters

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258318B (en) * 1957-08-05 1968-01-04 Olin Mathieson Device for the production of multiple filters for cigarettes or the like.
US3067644A (en) * 1958-04-22 1962-12-11 American Mach & Foundry Mouthpiece feed
US3058475A (en) * 1959-12-28 1962-10-16 American Mach & Foundry Cigarette making machine
US3081778A (en) * 1961-01-16 1963-03-19 American Mach & Foundry Method of making a cigarette having a composite filter plug
GB1043706A (en) 1962-07-06 1966-09-21 Jan Antoni Rakowicz Improvements in or relating to cutting apparatus for mouthpiece rods
GB1029127A (en) 1964-04-06 1966-05-11 Tom Rowlands Improvements in or relating to the manufacture of mouthpiece cigarettes
EP0383970A1 (en) * 1987-11-18 1990-08-29 Japan Tobacco Inc. Apparatus for manufacturing cigarette filters

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2666373A3 (en) * 2012-05-23 2015-09-23 HAUNI Maschinenbau AG Device for cutting filter rods
ITBO20130234A1 (en) * 2013-05-21 2014-11-22 Gd Spa SUPPLY DEVICE FOR FILTER ROPES OF AN AUTOMATIC TOBACCO INDUSTRY MACHINE.
WO2014188305A1 (en) * 2013-05-21 2014-11-27 G. D S.P.A. Device for feeding filter rods in an automatic machine for the tobacco industry
US9963260B2 (en) 2014-04-14 2018-05-08 Altria Client Services Llc Rotatable drum and method and system using the same for the automated production of E-vapor devices
US11246353B2 (en) 2014-04-14 2022-02-15 Altria Client Services Llc Rotatable drum and method and system using the same for the automated production of E-vapor devices
US11576440B2 (en) 2014-04-14 2023-02-14 Altria Client Services Llc Method and system for the automated production of e-vapor devices
CN106535669A (en) * 2014-04-14 2017-03-22 奥驰亚客户服务有限责任公司 Rotatable drum and method and system using the same for the automated production of e-vapor devices
US10676228B2 (en) 2014-04-14 2020-06-09 Altria Client Services Llc Rotatable drum and method and system using the same for the automated production of e-vapor devices
US9968131B2 (en) 2014-10-16 2018-05-15 Altria Client Services Llc Assembly drum and system and method using the same for the automated production of e-vapor devices
US10721962B2 (en) 2014-10-16 2020-07-28 Altria Client Services Llc Assembler system for assembling an electronic vaping article
US11490652B2 (en) 2014-10-16 2022-11-08 Altria Client Services Llc Assembler system for assembling an electronic vaping article
US10858137B2 (en) 2014-12-19 2020-12-08 Altria Client Services Llc System and method for applying a label for the automated production of e-vapor devices
US11247801B2 (en) 2014-12-19 2022-02-15 Altria Client Services Llc System and method for applying a label for the automated production of e-vapor devices
US11897655B2 (en) 2014-12-19 2024-02-13 Altria Client Services Llc System and method for applying a label for the automated production of e-vapor devices
WO2017068493A1 (en) * 2015-10-19 2017-04-27 G.D S.P.A. Machine for making smokers' articles
CN105533798A (en) * 2016-02-26 2016-05-04 厦门烟草工业有限责任公司 Double-length filter tip section removing device and cigarette making and plug assembling machine
EP3298910A1 (en) * 2016-09-21 2018-03-28 G.D Societa' Per Azioni Device for cutting multiple-length rods of filtering material and unit for feeding rods of filtering material provided with said device
IT201600094846A1 (en) * 2016-09-21 2018-03-21 Gd Spa Device for cutting rods of filtering material of multiple length and units for feeding sections of filtering material provided with said device.

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