WO1987007478A1 - Ameliorations relatives au traitement du tabac - Google Patents

Ameliorations relatives au traitement du tabac Download PDF

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Publication number
WO1987007478A1
WO1987007478A1 PCT/GB1987/000405 GB8700405W WO8707478A1 WO 1987007478 A1 WO1987007478 A1 WO 1987007478A1 GB 8700405 W GB8700405 W GB 8700405W WO 8707478 A1 WO8707478 A1 WO 8707478A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
steam
conveyor
cell
tobacco
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.)
Ceased
Application number
PCT/GB1987/000405
Other languages
English (en)
Inventor
Richard Ernest Gartside Neville
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.)
GBE International PLC
Original Assignee
GBE International PLC
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 GBE International PLC filed Critical GBE International PLC
Publication of WO1987007478A1 publication Critical patent/WO1987007478A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/18—Other treatment of leaves, e.g. puffing, crimpling, cleaning
    • A24B3/182—Puffing

Definitions

  • This invention relates to the expansion of tobacco products, more particularly, the expansion of the midrib of the tobacco leaf after cutting or shredding. This material is often referred to as cut stem.
  • the object of the invention is to restore the cell size of the living stem, which was lost by shrinkage during curing.
  • a pressure difference can also be created across the cell by first heating and then reducing the external pressure or heating under pressure then decompressing.
  • the present invention provides apparatus for expanding tobacco products comprising a pressure vessel having conveyor means therein to carry tobacco products through the vessel, means to supply steam under pressure to the vessel to heat tobacco products on the conveyor, and steam trap inlet and ' outlet means arranged- respectively to allow tobacco products to be passed into the vessel to the conveyor means, and from the vessel to be realeased to atmospheric pressure while maintaining the steam pressure within the vessel.
  • said inlet and outlet steam locks each comprises a cell wheel and an arrester arranged to be driven in synchronism by an intermittent motion means so that when the cell wheel is in a stationary position to receive tobacco products in a cell, the arrester moves through an open position to allow products to pass to the cell, and when the arrester has moved on to a closed position, the cell wheel indexes to present a fresh cell' in such open position.
  • FIGURE 1 shows a schematic side view of a tobacco treating apparatus
  • FIGURE 2 shows a schematic cross-section on the line II-II in Figure 1.
  • the apparatus provides a pressure vessel in which tobacco may be heated in steam under pressure, with means for supplying tobacco to the vessel and removing tobacco from the vessel in a continuous flow, with the tobacco remaining in the vessel for a chosen heating period; while maintaining an effective seal at the supply and exit points in the vessel so that steam pressure may be maintained in the vessel.
  • the tobacco On leaving the vessel the tobacco is released to atmospheric pressure resulting in expansion, and then dried and cooled by conventional means.
  • a pressure vessel 10 with inlet and outlet rotary air locks is provided to enclose the tobacco handling means indicated generally at 11 and enable the tobacco to be heated by steam under pressure for a fixed time, then released to atmospheric pressure to provide expansion.
  • a gauze band conveyor handling means would be used.
  • Various other possibilities (not shown) for the tobacco handling means include:-
  • the conveyor 11 comprises a gauze band 13 is carried by stay bars 14 between conveyor chains 15 to avoid tracking problems.
  • the gauze passes over a steam plenum chamber 16 with a perforated top to distribute the steam flow through the tobacco.
  • the pressure vessel 10 is fitted with an access door 17 and the whole conveyor is mounted by means of rollers on rails 12 so that it can be easily withdrawn for maintenance.
  • the drive (not shown) for the conveyor is external to the vessel 10 and drives the conveyor through a dog clutch 18.
  • the heating process is a condensation process, and high temperatures are reached, so it is self limiting and heating times are not critical. In fact times will be determined by the tobacco loading and steam flow rate. With 2,000 kg/hr of tobacco and 500 kg/hr of steam through a 0.5m2 gauze band the tobacco will reach equilibrium in less than 15 seconds within the chamber.
  • Saturated steam temperatures used are up to 155°C at 4 bar, with additional superheat, and can be controlled accurately. After decompression the temporary moisture addition will be no higher than normal, up to 5%, but could be limited by further super heating the steam. Air would be eliminated and only the steam required to condition the tobacco and replace air lock leaks would be required, approximately 0.2 kg/hr of steam per 1.0 kg of CRS, so it would be economical.
  • Steam is supplied from a source (not shown) by way of an inlet conduit 19 to the vessel 10.
  • An electric superheater 20 is included in the process steam supply, to ensure that the steam is dry. (Wet steam is filtered by the tobacco causing an undesirable soggy bottom layer to the tobacco). It also permits some tobacco drying to be achieved during the expansion process.
  • a surplussing valve 21 maintains a constant pressure within the pressure vessel by venting ' the surplus steam to an outlet 26.
  • Each steam lock 22, 23 comprises a cell wheel 24 which is stationary whilst a rotary arrester 25 is moving, as shown at the input position in Figure 1.
  • the cell wheel and arrester are driven intermittently in synchronisation.
  • the cell wheel is driven by a 60° indexer and the arrester by a 180° indexer.
  • the cell wheels 24, in this embodiment each having six cells, are arranged to be a close clearance fit in a rotary housing chamber so that there is little escape of steam past the tips of the blades of the cells.
  • the arresters 25 are 2-lobed rotors with a wide clearance in their respective housing chambers. The arresters 25 are driven in synchronism with the cell wheels 24 so that when a cell of the cell wheel 24 is in an "open" position ready to receive tobacco, it momentarily stops while the arrester 25 moves to its "open” position to allow tobacco to pass into the cell. The arrester 25 then moves to its "closed” position and the cell wheel indexes by one cell for the process to be repeated.
  • inlet and outlet steam locks always provide a steam barrier to maintain pressure in the vessel 10, while allowing tobacco to pass into and out of the vessel in a continuous process.
  • the method may be applicable to lamina.

Landscapes

  • Manufacture Of Tobacco Products (AREA)

Abstract

Installation de gonflage de produits à base de tabac comprenant un récipient sous pression (10) contenant une bande transporteuse (11) sur laquelle les produits sont transportés à travers le récipient, un organe permettant d'envoyer de la vapeur sous pression dans le récipient pour chauffer les produits à base de tabac sur la bande transporteuse, et des organes d'entrée et de sortie à trappe de vapeur (22, 23) permettant respectivement l'introduction des produits à base de tabac dans le récipient vers la bande transporteuse, et leur extraction du récipient pour les ramener à la pression atmosphérique tout en maintenant la pression de vapeur à l'intérieur du récipient.
PCT/GB1987/000405 1986-06-12 1987-06-11 Ameliorations relatives au traitement du tabac Ceased WO1987007478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8614366 1986-06-12
GB868614366A GB8614366D0 (en) 1986-06-12 1986-06-12 Decompression process

Publications (1)

Publication Number Publication Date
WO1987007478A1 true WO1987007478A1 (fr) 1987-12-17

Family

ID=10599382

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000405 Ceased WO1987007478A1 (fr) 1986-06-12 1987-06-11 Ameliorations relatives au traitement du tabac

Country Status (2)

Country Link
GB (1) GB8614366D0 (fr)
WO (1) WO1987007478A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR890100132A (en) * 1988-03-04 1990-01-19 Gbe International Limited Combination of a supplier system and a moisture content control system
GB2221830B (en) * 1988-07-28 1992-08-26 Daniel Henry Dudek Means and method for sterilizing spices and like substances
EP0404475A3 (fr) * 1989-06-19 1993-03-03 R.J. Reynolds Tobacco Company Procédé et appareil pour le traitement de matériaux tels que le tabac
US5873371A (en) * 1995-04-07 1999-02-23 Giolvas; George Method and apparatus for the removal of harmful constituents from cigarettes and tobacco before smoking
EP1177730A1 (fr) * 2000-08-04 2002-02-06 British American Tobacco (Germany) GmbH Procédé et dispositif pour le conditionnement de produits de tabac découpés
US6575170B1 (en) * 2000-11-27 2003-06-10 Ravi Prasad Method and apparatus for expanding tobacco material
DE10304629B4 (de) * 2003-02-05 2008-10-30 British American Tobacco (Germany) Gmbh Druckkonditionierungsverfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB675292A (en) * 1948-06-23 1952-07-09 Guardite Corp Improvements in or relating to puffing of cellular products
GB730527A (en) * 1952-09-27 1955-05-25 Korber Kurt Improvements in apparatus for moistening tobacco and like fibrous materials
US4211243A (en) * 1977-02-22 1980-07-08 Kikkoman Shoyu Co., Ltd. Process for producing expanded tobacco stems
US4561453A (en) * 1981-12-16 1985-12-31 Rothchild Ronald D Treatment of tobacco under pressure in a continuous process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB675292A (en) * 1948-06-23 1952-07-09 Guardite Corp Improvements in or relating to puffing of cellular products
GB730527A (en) * 1952-09-27 1955-05-25 Korber Kurt Improvements in apparatus for moistening tobacco and like fibrous materials
US4211243A (en) * 1977-02-22 1980-07-08 Kikkoman Shoyu Co., Ltd. Process for producing expanded tobacco stems
US4561453A (en) * 1981-12-16 1985-12-31 Rothchild Ronald D Treatment of tobacco under pressure in a continuous process

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR890100132A (en) * 1988-03-04 1990-01-19 Gbe International Limited Combination of a supplier system and a moisture content control system
GB2221830B (en) * 1988-07-28 1992-08-26 Daniel Henry Dudek Means and method for sterilizing spices and like substances
EP0404475A3 (fr) * 1989-06-19 1993-03-03 R.J. Reynolds Tobacco Company Procédé et appareil pour le traitement de matériaux tels que le tabac
US5873371A (en) * 1995-04-07 1999-02-23 Giolvas; George Method and apparatus for the removal of harmful constituents from cigarettes and tobacco before smoking
EP1177730A1 (fr) * 2000-08-04 2002-02-06 British American Tobacco (Germany) GmbH Procédé et dispositif pour le conditionnement de produits de tabac découpés
DE10038114A1 (de) * 2000-08-04 2002-02-21 Bat Cigarettenfab Gmbh Verfahren und Vorrichtung zur Konditionierung von zerkleinerten Tabakmaterialien
US6779527B2 (en) 2000-08-04 2004-08-24 British American Tobacco (Germany) Gmbh Device for conditioning comminuted tobacco material
US6575170B1 (en) * 2000-11-27 2003-06-10 Ravi Prasad Method and apparatus for expanding tobacco material
DE10304629B4 (de) * 2003-02-05 2008-10-30 British American Tobacco (Germany) Gmbh Druckkonditionierungsverfahren

Also Published As

Publication number Publication date
GB8614366D0 (en) 1986-07-16

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