WO2004080215A1 - Appareil de coupe de tabac - Google Patents

Appareil de coupe de tabac Download PDF

Info

Publication number
WO2004080215A1
WO2004080215A1 PCT/GB2004/001050 GB2004001050W WO2004080215A1 WO 2004080215 A1 WO2004080215 A1 WO 2004080215A1 GB 2004001050 W GB2004001050 W GB 2004001050W WO 2004080215 A1 WO2004080215 A1 WO 2004080215A1
Authority
WO
WIPO (PCT)
Prior art keywords
tobacco
cutting
width
knife
cutting edge
Prior art date
Application number
PCT/GB2004/001050
Other languages
English (en)
Inventor
Mansueto Favaro
Original Assignee
Garbuio Ltd
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 Garbuio Ltd filed Critical Garbuio Ltd
Priority to EP04719531A priority Critical patent/EP1603413A1/fr
Publication of WO2004080215A1 publication Critical patent/WO2004080215A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B7/00—Cutting tobacco
    • A24B7/04—Cutting tobacco by machines with revolving knives
    • A24B7/08—Cutting tobacco by machines with revolving knives with several knives which act one after the other
    • A24B7/12—Cutting tobacco by machines with revolving knives with several knives which act one after the other with cutter axes transverse to the feeding direction

Definitions

  • This invention relates to tobacco cutting machines and more particularly but not exclusively to the cutting of tobacco for use in cigarettes and/or cigars.
  • Tobacco leaf is required to be cut into strands of tobacco which are suitable for tobacco products such as cigarettes. It is known to use rotary cutting machines to cut or shred the tobacco leaf into thin strands. Such tobacco cutting machines commonly comprise upper and lower converging conveyors forming a rectangular throat and being convergent in the direction of tobacco feed. A mouthpiece is provided at the convergent end of the throat. The leaf is fed into the throat at the divergent end and the conveyors drive the leaf continuously towards the mouthpiece.
  • the tobacco leaf is cut by knives mounted on rotating knife holder.
  • the holder is cylindrical shaped and mounted such that its axis of rotation is substantially parallel to the axis of the throat.
  • the knives are mounted and evenly distributed around the holder such that the cutting edge of each knife is caused to pass across the mouthpiece and hence cut the tobacco leaf.
  • At least one of the conveyors is arranged to be capable of moving in the vertical direction such that a regulated pressure can be applied to compress the tobacco leaf material.
  • the width of the cut strands can be adjusted by altering the conveyor speeds or the rotational speed of the knife holder.
  • the cutting edges of each knife are continuously sharpened by a grinding unit mounted adjacent the rotating knife holder, on the cutting machine.
  • the thin shreds of tobacco leaf produced by the cutting machine are then often mixed with larger pieces of tobacco leaf or tobacco stem and used in the manufacture of cigarettes.
  • the larger pieces of tobacco stem or leaf are used to provide strength to the finished cigarette.
  • the origin of these larger pieces is either a by product of the leaf threshing process which separates the lamina from the stem of the leaf or from a sieving process of the tobacco blend just prior to cutting.
  • One problem associated with this process is the difficulty in mixing the larger pieces of tobacco with the main flow of smaller shredded pieces at a consistent rate such that the mixture and hence a cigarette contains the correct proportions of constant width strands and larger pieces.
  • tobacco cutting apparatus for cutting a body of tobacco moveable towards said cutting apparatus, comprising a rotatable member having at least two knives mounted thereon, these first and second knives each having a cutting edge extending substantially parallel to the axis of the rotatable member wherein the width of the cutting edge or the width of a discrete portion of said cutting edge of said first knife is shorter than the cutting edge width of said second knife.
  • the cutting apparatus is able to cut shreds of tobacco material which individually have portions of differing depths.
  • the apparatus further includes conveyor means for moving said body of tobacco towards said cutting apparatus.
  • the conveyor means includes compression means to compress said body of tobacco material before the cutting operation is performed.
  • the conveyor means further includes a mouthpiece through which the body of tobacco is directed towards the rotatable member.
  • the cutting edge of at least one of said knives is an equal width to the width of the moveable body of compressed tobacco exited from said mouthpiece.
  • the width of at least one knife is equal to the width of the mouthpiece through which the body of tobacco is exited towards the rotatable member.
  • the cutting edge of at least one knife comprises a series of discrete cutting edge portions separated from one another by a series of slots formed in said cutting edge.
  • the slots comprise a divergent shape, the narrowest width of the slot being at its mouth, such that during a cutting operation the inner surface of each slot does not contact the material to be cut.
  • each of said slots is within a range of 90° to 95°
  • At least two knives comprise a cutting edge having a width equal to the width of the mouthpiece.
  • two of the knives having cutting edge portion substantially equal to the width of the body of tobacco to be cut are located diametrically opposite one another, on the rotatable member.
  • a method of cutting tobacco material comprising the steps of, substantially continuously feeding the tobacco material towards a rotatable cutting member, said cutting member having at least two knives mounted thereon, rotating said rotatable member such that the knives mounted thereon contact the tobacco material, cutting the material with a first knife, said first knife comprising a cutting edge having its width, or a discrete portion of its cutting edge having a width, shorter than the width of another knife, subsequently cutting the material with a second knife said second knife having a cutting edge with a greater width than said first knife cutting edge or a discrete portion of said first knife cutting edge such than a shred of tobacco is completely removed from the body of tobacco material.
  • Preferably said tobacco material is compressed before the cutting operation.
  • Figure 1 is a schematic illustration of a cutting machine and associated conveyor means.
  • Figure 2 is a section view of a rotatable member of a cutting machine according to the present invention.
  • Figure 3 is a view in the direction of arrow X on figure 2.
  • Figure 4 is a view in the direction of arrow Y of figure 2.
  • Figure 5 is an illustration indicating the divergent gap in one of the knives according to the present invention.
  • Figure 6 is a cross section view of a knife mounted on a retaining plate.
  • Figure 7 is a plan view of a piece of tobacco leaf cut by the apparatus of figure 1.
  • Figure 8 is a plan view of a piece of tobacco according to another embodiment of the present invention.
  • a tobacco cutting machine 1 comprises conveyors 2 and 4 driven by a motor (not shown). Tobacco leaf 6 is inserted into the entrance 7 of the conveyors, 2, 4 and driven towards a mouth 8 through which leaf tobacco 6 is compressed.
  • the conveyor 4 is mounted so as be rotatable about axis A and be capable of movement towards and away from conveyor 2 forming a converging channel into which the tobacco leaf 6 is directed. This allows the tobacco leaf to be held between the conveyors whilst being driven towards the mouth 8.
  • a compression unit 10 is mounted adjacent the mouth 8 to provide compression via the conveyors 2, 4 to the tobacco leaf and form a plug of tobacco at the mouth 8 suitable for cutting.
  • a rotatable cylinder 12 is situated adjacent the conveyors and is provided with a plurality of knives 14.
  • ten knives 14 are provided although any suitable number can be employed.
  • the knives 14 are each located in a mounting station and located firmly in place by locating plates 16, at circumferential equidistant positions form each other such that the cylinder forms a rotatable cutting apparatus.
  • Some of the knives 14 have a complete cutting edge 18, as shown in figure 3, whilst the remainder have a cutting edge 20 comprising cut away portions or slots 21 formed therein. These slots 21 divide the cutting edge into discrete portions 22 of the cutting edge.
  • the form of these knives 14 can be seen with reference to figure 4.
  • two of the ten knives 14 have a complete cutting edge whilst the remaining 8 knives 14 have cut away portions or slots 21 formed within their cutting edges.
  • the cutting edges of the knives 14 are of approximately 3mm depth and are bevelled in the manner of a conventional knife. The two knives 14 with the complete cutting edges are positioned diametrically opposite one another.
  • the mounting plates 16 are formed with grooves 17 in line with the slots 21 of their corresponding knives 14 such that the mounting plates 16 themselves do not interfere with the cutting process. It is also envisaged that these knives 14 need not have a plurality of slots 21. Instead the knife or knives 14 may simply comprise a cutting edge of shorter width than another knife mounted on the cutting apparatus. In effect only one slot at either or both width ends would be formed in the body of tobacco by such a knife.
  • the cut away portions or slots 21 of the knives 14 are shown more clearly with reference to figure 5 each gap or slot 21 formed in the cutting edge is divergent away from the cutting edge by an angle 'x'. In the preferred embodiment of the invention the angle is between 90° and 95° although an angle range between 90° and 120° is employable. This divergent or angled slot is shaped so as to ensure that the inner surface 24 of the slot does not contact the tobacco leaf during the cutting operation.
  • a grinding or sharpening apparatus 28 is positioned adjacent the cutting apparatus.
  • the knives 14 are sharpened in the conventional way by grinding the bevel.
  • the grinding apparatus 28 comprises a grindstone 26 and a drive mechanism for traversing the grindstone over the bevelled edges of the knives 14 as they rotate.
  • a collection chute 30 is provided to collect the cut or shredded tobacco material.
  • the leaf tobacco 6 is continuously fed into the space between the conveyors which move the tobacco towards the mouthpiece 8.
  • the tobacco leaf is compressed at the mouth, into an extruded plug.
  • This plug is driven towards the rotating cutting apparatus.
  • the cylinder rotates such that the cutting edge of the knives 14 mounted on the cylinder cut through the leaf tobacco 6 forming thin shreds of tobacco.
  • the knives 14 which comprise a blade having a complete cutting edge 19 cut shreds of tobacco in the conventional manner. In this cutting operation the body of tobacco is cut across its whole width so a shred 32 of tobacco is completely detached from the body of tobacco and falls into the collection chute 30.
  • the knives 14 comprising a blade having a cutting edge 20 incorporating grooves 21 or a castellated portion as shown in fig 4 cut similarly shaped grooves in the tobacco leaf material. After these grooves 34 have been cut in the tobacco material the next knife or a subsequent knife mounted on the rotating knife holder cuts the body of tobacco material across its whole width and hence cuts a discrete shred 32 of tobacco having a cross section shown in fig 7.
  • the tobacco material may be cut by a number adjacent knives 14 having shorter or slotted cutting edges 20, providing progressively deeper slots or cut our portions to be formed in the tobacco material, before it is cut across its full width by a knife having a full cutting edge which extends across the whole width of the tobacco material.
  • An example of a shred 33 cut in this way is shown in fig 8.
  • These cutting edges could be arranged such that upon rotation of the knife holder the series of knives cuts portions of differing depths within the approaching body of tobacco until eventually one of the knives makes the final cutting operation thus removing the shred of tobacco.
  • FIG 7 shows the cross section of a shred of tobacco cut initially by one or more slotted knives 14 then finally cut by a knife having a full cutting edge which removes the shred from the body of tobacco.
  • This shred comprises tobacco leaf portions of comparatively greater and lesser depths.
  • Figure 8 shows the cross section of a shred of tobacco having been cut by one or more knives 14 having a shorter cutting edge than the knife having a cutting edge substantially similar to the width of the body of tobacco. This shred of tobacco has only one portion of greater depth.
  • these shreds of tobacco are combined with conventional shreds of tobacco in the manufacture of tobacco products such as cigarettes to provide strength to the finished product without the need to incorporate tobacco by-products from the tobacco threshing process.
  • the strength and bulk previously provided by these by- products may now, according to this invention, be provided by the cut tobacco leaf itself and also from the same batch of tobacco leaf as the conventionally sized shreds are produced.
  • the knives 14 are continuously sharpened by the grinding apparatus traversing the bevelled edges of the knives 14.
  • the manufacturer of the tobacco products can select the amount of conventionally cut tobacco and the amount of tobacco cut by the castellated or slotted blades.
  • the manufacturer would also be able to specify the number, depth, size and position of the cut out portions of the blades according to his specific requirements.

Landscapes

  • Manufacture Of Tobacco Products (AREA)

Abstract

L'invention concerne un appareil de coupe de tabac (1) permettant de couper des feuilles de largeurs variées. Cet appareil comprend un élément rotatif (12) présentant au moins deux couteaux (14) montés sur cet élément. Chaque couteau (14) présente une lame coupante s'étendant sensiblement parallèle à l'axe de l'élément rotatif (12). Au moins un couteau monté sur l'élément rotatif (12) comprend un bord coupant (18) présentant une largeur sensiblement égale à la largeur de la matière de tabac à couper, et au moins un autre couteau (14) présentant un bord de coupe (20) ou une partie de son bord de coupe présentant une largeur inférieure à l'autre, ou à celle d'un autre couteau (14). Des bandes de tabac sont coupées, lesquelles bandes présentant des parties de profondeurs différentes, qui confèrent une résistance accrue aux produits de tabac finis, comme les cigarettes.
PCT/GB2004/001050 2003-03-12 2004-03-11 Appareil de coupe de tabac WO2004080215A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04719531A EP1603413A1 (fr) 2003-03-12 2004-03-11 Appareil de coupe de tabac

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0305607A GB0305607D0 (en) 2003-03-12 2003-03-12 Tobacco cutting apparatus
GB0305607.4 2003-03-12

Publications (1)

Publication Number Publication Date
WO2004080215A1 true WO2004080215A1 (fr) 2004-09-23

Family

ID=9954593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001050 WO2004080215A1 (fr) 2003-03-12 2004-03-11 Appareil de coupe de tabac

Country Status (3)

Country Link
EP (1) EP1603413A1 (fr)
GB (1) GB0305607D0 (fr)
WO (1) WO2004080215A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120370A1 (fr) * 2005-05-12 2006-11-16 Garbuio Ltd Appareil d’alimentation en tabac
WO2010029348A2 (fr) * 2008-09-09 2010-03-18 Dickinson Legg Limited Appareil de coupe
DE102009046666A1 (de) 2009-11-12 2011-05-19 Hauni Maschinenbau Ag Schneidmesser eines Tabakschneiders
DE102009053565A1 (de) 2009-11-18 2011-05-19 Hauni Maschinenbau Ag Schneidmesser eines Tabakschneiders
WO2012060725A1 (fr) 2010-11-03 2012-05-10 International Tobacco Machinery Poland Sp. Z O.O. Lame coulissante à monter sur le tambour d'un hachoir à tabac
WO2012064209A1 (fr) * 2010-11-10 2012-05-18 International Tobacco Machinery Poland Sp. Z O.O. Lame pour couper des fibres de tabac de longueur prédéterminée et son procédé de production
CN104730214A (zh) * 2015-03-12 2015-06-24 红云红河烟草(集团)有限责任公司 一种切丝机切丝效果的测试方法
CN104770856A (zh) * 2015-03-05 2015-07-15 云南中烟工业有限责任公司 一种能控制烟丝长度分布的切丝方法和刀片
CN104833287A (zh) * 2015-03-12 2015-08-12 红云红河烟草(集团)有限责任公司 一种切丝宽度检测方法
CN105004301A (zh) * 2015-08-12 2015-10-28 红塔烟草(集团)有限责任公司 一种切丝宽度的测试方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149292A (en) * 1981-07-23 1985-06-12 Amf Inc Cutting layered material
US4700720A (en) * 1984-04-09 1987-10-20 Amf Incorporated Knives in cutting machines
WO1995007031A1 (fr) * 1993-09-07 1995-03-16 Fabriques De Tabac Reunies Sa Coupeuse rotative
EP1004247A1 (fr) * 1998-11-26 2000-05-31 British-American Tobacco (Germany) GmbH Méthode et appareil pour couper du tabac

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149292A (en) * 1981-07-23 1985-06-12 Amf Inc Cutting layered material
US4700720A (en) * 1984-04-09 1987-10-20 Amf Incorporated Knives in cutting machines
WO1995007031A1 (fr) * 1993-09-07 1995-03-16 Fabriques De Tabac Reunies Sa Coupeuse rotative
EP1004247A1 (fr) * 1998-11-26 2000-05-31 British-American Tobacco (Germany) GmbH Méthode et appareil pour couper du tabac

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006120370A1 (fr) * 2005-05-12 2006-11-16 Garbuio Ltd Appareil d’alimentation en tabac
CN102196735A (zh) * 2008-09-09 2011-09-21 迪更生莱格公司 切割装置
WO2010029348A2 (fr) * 2008-09-09 2010-03-18 Dickinson Legg Limited Appareil de coupe
WO2010029348A3 (fr) * 2008-09-09 2010-07-15 Dickinson Legg Limited Appareil de coupe
JP2012501640A (ja) * 2008-09-09 2012-01-26 ディキンソン レッグ リミテッド 切断装置
DE102009046666A1 (de) 2009-11-12 2011-05-19 Hauni Maschinenbau Ag Schneidmesser eines Tabakschneiders
WO2011057726A2 (fr) * 2009-11-12 2011-05-19 Hauni Maschinenbau Ag Lame de coupe d'un dispositif de coupe de tabac
WO2011057726A3 (fr) * 2009-11-12 2011-07-21 Hauni Maschinenbau Ag Lame de coupe d'un dispositif de coupe de tabac
DE102009053565A1 (de) 2009-11-18 2011-05-19 Hauni Maschinenbau Ag Schneidmesser eines Tabakschneiders
WO2011060896A1 (fr) 2009-11-18 2011-05-26 Hauni Maschinenbau Ag Lame d'un dispositif à couper le tabac
CN102647923A (zh) * 2009-11-18 2012-08-22 豪尼机械制造股份公司 烟草切割机的切割刀
WO2012060725A1 (fr) 2010-11-03 2012-05-10 International Tobacco Machinery Poland Sp. Z O.O. Lame coulissante à monter sur le tambour d'un hachoir à tabac
WO2012064209A1 (fr) * 2010-11-10 2012-05-18 International Tobacco Machinery Poland Sp. Z O.O. Lame pour couper des fibres de tabac de longueur prédéterminée et son procédé de production
CN104770856A (zh) * 2015-03-05 2015-07-15 云南中烟工业有限责任公司 一种能控制烟丝长度分布的切丝方法和刀片
CN104730214A (zh) * 2015-03-12 2015-06-24 红云红河烟草(集团)有限责任公司 一种切丝机切丝效果的测试方法
CN104833287A (zh) * 2015-03-12 2015-08-12 红云红河烟草(集团)有限责任公司 一种切丝宽度检测方法
CN105004301A (zh) * 2015-08-12 2015-10-28 红塔烟草(集团)有限责任公司 一种切丝宽度的测试方法

Also Published As

Publication number Publication date
EP1603413A1 (fr) 2005-12-14
GB0305607D0 (en) 2003-04-16

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