EP0638246A2 - Dispositif pour couper le tabac - Google Patents

Dispositif pour couper le tabac Download PDF

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Publication number
EP0638246A2
EP0638246A2 EP19940305618 EP94305618A EP0638246A2 EP 0638246 A2 EP0638246 A2 EP 0638246A2 EP 19940305618 EP19940305618 EP 19940305618 EP 94305618 A EP94305618 A EP 94305618A EP 0638246 A2 EP0638246 A2 EP 0638246A2
Authority
EP
European Patent Office
Prior art keywords
cutting
blade
tobacco
ceramic material
cylinder
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.)
Withdrawn
Application number
EP19940305618
Other languages
German (de)
English (en)
Inventor
Barbara Carol Klammer
Ian Ernest Tatham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British American Tobacco Investments Ltd
Original Assignee
British American Tobacco Investments Ltd
British American Tobacco Co 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 British American Tobacco Investments Ltd, British American Tobacco Co Ltd filed Critical British American Tobacco Investments Ltd
Publication of EP0638246A2 publication Critical patent/EP0638246A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0033—Cutting members therefor assembled from multiple blades

Definitions

  • the subject invention relates to the cutting of tobacco in tobacco cutting machines and to the cutting of tobacco rod on cigarette making machines.
  • tobacco feed means of which comprise upper and lower conveyors, which conveyors are convergent in the direction of tobacco feed. Because of the convergency of the feed conveyors, tobacco fed between them is progressively compressed to form a so-called cheese.
  • the cheese passes into a passageway in a rigid throat block.
  • cutting means Disposed to the downstream side of the throat block, i.e. to that side remote the feed means, is cutting means generally comprising a rotatively drivable cylinder, disposed horizontally and perpendicularly to the direction of feed of the tobacco, and a number of steel cutting blades, four for example, mounted on the cylinder.
  • the subject invention provides tobacco cutting apparatus comprising tobacco feed means and tobacco cutting means, the feed means being operable to feed a compressed body of tobacco towards the cutting means and the cutting means comprising a cutting blade a cutting edge of which is of ceramic material.
  • the ceramic material has, compared with the steel of the conventional blades, a far superior resistance to the wear that is engendered by contact with the forward face of the cheese, the ceramic cutting edges remain effectively sharp over a prolonged period, after which period the blades are removed and replaced with fresh blades.
  • the blade with ceramic cutting edges can be fixedly secured to the cylinder so that during operation of the cutting machine the cutting edges of the blades remain at a fixed location relative to the cylinder.
  • the ceramic material is or includes aluminium oxide.
  • the process of forming the ceramic material may include high pressure compaction of particles and thermal hardening.
  • the subject invention also provides a method of cutting tobacco, wherein a compressed body of tobacco is fed towards rotary cutting means comprising a cutting blade, a cutting edge of said blade being of ceramic material and said blade being maintained during the cutting operation at a fixed location relative to the axis of rotation of said cutting means.
  • the subject invention further provides a tobacco cutting machine cutting cylinder, said cylinder comprising non-feed fixing means whereby a plurality of cutting blades can be fixedly secured of said cylinder at respective locations equiangularly spaced about said cylinder.
  • Non-feed is to be taken to have reference to the blades remaining in a fixed location relative to the cylinder during the cutting operation.
  • the steel cutting cylinder designated by reference numeral 1, is mounted horizontally in a tobacco cutting machine in operative relationship to a throat block 2 of the machine.
  • the cylinder 1 is rotatively drivable in the direction of arrow A by drive means (not shown).
  • the cylinder is relieved for the purpose of receiving an elongate ceramic cutting blade 3 and to receive a clamping plate, which plate is held in the clamping condition thereof, by a number of bolts, one of which is shown in Figure 1 and is designated by reference numeral 5.
  • the clamping plate 4 By means of the clamping plate 4 the blade 3 is held fixedly relative of the cylinder 1. In that the inner edge of the blade 3 abuts a relief edge 6 of the cylinder 1, the blade 3 is accurately located relative to the cylinder 1.
  • the blade 3 is manufactured so that the width dimension thereof lies within precision tolerances. It is thus assured that by abutting the blade 3 against the relief edge 6 the cutting edge 7 of the blade 3 is accurately positioned relative to outlet face 8 of the throat block 2.
  • Three or more other identical blades (not shown) are secured, by identical securement means, to cylinder 1, the totality of the blades being equi-angularly spaced of the cylinder.
  • the total number of blades may be six or more.
  • each blade may be constituted by a plurality of discrete, abutting elements.
  • a blade designated by reference numeral 9
  • the blade 9 is constituted of five discrete, abutting elements 10 to 14.
  • a shim which shim is inserted between, and in contact with each of, the relief edge 6 and the inner edge of the blade 3.
  • Cutting blades used in accordance with the subject invention may be formed of a ceramic material which is designated 'Z900 Zirconia' by Morgan Matroc Limited, fabricators of ceramic items.
  • the material may be a composite, fibre reinforced material, in which case the reinforcement may be by way of ceramic whiskers.
  • cigarette making machines operate to produce continuously a rod comprising a smoking material filler and a paper wrapper, such rod being referred to herein as tobacco rod.
  • tobacco rod comprising a smoking material filler and a paper wrapper
  • cigarette making machines include a cut-off unit the function of which is to sever the tobacco rod, as the rod is fed to the unit by elements of the making machine which act as feed means, thus to produce discrete sections of rod, the length of which sections is that required for cigarettes.
  • Such cut-off unit comprises rotary mounting means on which is mounted one or more cutting blades.
  • the mounting means rotates the or each blade severs the tobacco rod and the or each blade is brought into contact with a grinding tool, there thereby being effected a sharpening action on the cutting edge of the or each blade.
  • a sharpening action serve to remove metal from the outer, cutting edge of the or each blade, provision is made for the blade or blades to be continuously fed outwardly of the mounting means during operation of the cut-off unit.
  • the subject invention yet further provides a cigarette making machine cut-off unit comprising rotary mounting means and a cutting blade mounted of said mounting means, the said blade being secured of said mounting means by non-feed fixing means and the cutting edge of said blade being of ceramic material.
  • the subject invention even further provides tobacco material cutting apparatus comprising rotary mounting means and a cutting blade mounted of said mounting means, the said blade being secured of said mounting means by non-feed fixing means and the cutting edge of said blade being of ceramic material.
  • tobacco material includes both tobacco rod (as defined hereinabove) and tobacco as such.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Tobacco Products (AREA)
EP19940305618 1993-08-11 1994-07-28 Dispositif pour couper le tabac Withdrawn EP0638246A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9316637 1993-08-11
GB939316637A GB9316637D0 (en) 1993-08-11 1993-08-11 Cutting tobacco

Publications (1)

Publication Number Publication Date
EP0638246A2 true EP0638246A2 (fr) 1995-02-15

Family

ID=10740288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940305618 Withdrawn EP0638246A2 (fr) 1993-08-11 1994-07-28 Dispositif pour couper le tabac

Country Status (2)

Country Link
EP (1) EP0638246A2 (fr)
GB (1) GB9316637D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048748A1 (fr) * 2003-11-24 2005-06-02 International Tobacco Machinery Poland Ltd. Couteau servant a couper/hacher des materiaux vegetaux organiques, en particulier des materiaux du tabac
WO2011057726A2 (fr) * 2009-11-12 2011-05-19 Hauni Maschinenbau Ag Lame de coupe d'un dispositif de coupe de tabac
WO2011060896A1 (fr) * 2009-11-18 2011-05-26 Hauni Maschinenbau Ag Lame d'un dispositif à couper le tabac
CN107361401A (zh) * 2016-05-12 2017-11-21 秦皇岛烟草机械有限责任公司 一种切丝机刀及磨刀设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113524393B (zh) * 2021-07-02 2022-11-15 红云红河烟草(集团)有限责任公司 一种切丝机专用陶瓷刀片及制造方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048748A1 (fr) * 2003-11-24 2005-06-02 International Tobacco Machinery Poland Ltd. Couteau servant a couper/hacher des materiaux vegetaux organiques, en particulier des materiaux du tabac
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
WO2011060896A1 (fr) * 2009-11-18 2011-05-26 Hauni Maschinenbau Ag Lame d'un dispositif à couper le tabac
CN107361401A (zh) * 2016-05-12 2017-11-21 秦皇岛烟草机械有限责任公司 一种切丝机刀及磨刀设备
CN107361401B (zh) * 2016-05-12 2019-02-05 秦皇岛烟草机械有限责任公司 一种切丝机刀及磨刀设备

Also Published As

Publication number Publication date
GB9316637D0 (en) 1993-09-29

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19940805

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED

18W Application withdrawn

Withdrawal date: 19990520