US3727755A - Pneumatic separator for a stream of cut tobacco - Google Patents

Pneumatic separator for a stream of cut tobacco Download PDF

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Publication number
US3727755A
US3727755A US00105312A US3727755DA US3727755A US 3727755 A US3727755 A US 3727755A US 00105312 A US00105312 A US 00105312A US 3727755D A US3727755D A US 3727755DA US 3727755 A US3727755 A US 3727755A
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US
United States
Prior art keywords
air
chamber
air permeable
wall
drum
Prior art date
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Expired - Lifetime
Application number
US00105312A
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English (en)
Inventor
A Cristiani
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AMF Inc
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AMF Inc
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Publication date
Application filed by AMF Inc filed Critical AMF Inc
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Publication of US3727755A publication Critical patent/US3727755A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/185—Separating devices, e.g. winnowing, removing impurities

Definitions

  • This invention relates generally to tobacco processing equipment and, more particularly to an improved machine which separates the stems and other dense foreign matter from a stream of cut tobacco to enable a cigarette maker to be fed continuously with selected cut tobacco for forming a tobacco braid.
  • pneumatic separation, or selection by ventilation is effected in a ventilation chamber which communicates with a duct. Selected cut tobacco is moved away from the chamber by means of air current that flowsthrough the duct.
  • the bottom of the chamber is inclined downward towards the inlet of the duct and supports perforated plate elements. Cut tobacco that is partially processed by ballistic separation is fed to an upper end on an angle that is substantially tangent to the ventilation chamber, a stem dropping aperture being provided at the lower end of the ventilation chamber to feed tobacco stems to a stern collecting belt.
  • the ventilation chamber has at least two successive chambers arranged in tandem in the inclined bottom for ventilation. The chambers are also connected with the cut tobacco suction duct and communicate with each other.
  • a ventilation chamber is divided into two parts, each being associated with a hood which defines the chamber at the top and communicates with a suction pipe.
  • the bottom of the chamber consists of a plurality of plates in overlapping and spaced relationship relative to each other and laterally interspaced to form apertures for stems separated from the cut tobacco. The stem drop through the spaces between the plates onto an underlying stem collecting belt.
  • a stream of cut-tobacco having undesired stems and heavy foreign matter is directed to move substantially tangentially passed and beneath a rotating drum having an air permeable surface.
  • a source of suction is coupled to suck air through the air permeable surface of the drum to the interior of the drum.
  • the movement of air through the stream of cut tobacco and through the surface of the drum causes the relatively light particles of tobacco from the stream to move upward and collect on the surface of the drum.
  • the relatively heavy stems and foreign matter of the stream of tobacco are not effected by the flow of air through the air permeable surface of the drum and down into a collecting bin.
  • FIG. 1 is a cross sectional view of structure in accordance with the principles of this invention.
  • FIG. 2 is aview in perspective of the structure of FIG. 1.
  • the device comprises essentially a hopper-shaped chamber 1 defined by two side walls 2, 3, inclined towards each other and two substantially vertical end walls to provide an upper opening and a lower opening.
  • Side wall 2 supports a plurality of horizontally oriented louvers 104 which extend across the width of wall 2 from one end wall to the other to form an air permeable wall.
  • Each louver is rotatably supported by a horizontally oriented shaft.
  • the plurality of louvers forms a grate 4 having openings that are adjustable.
  • a non air permeable wall member 5 Positioned below grate 4 and swingably coupled to the lower edge of side wall 2 by means of a hinge type of structure 6 is a non air permeable wall member 5.
  • the hinge structure 6 is positioned to permit the wall member 5 to rotate about an axis that is parallel to the axis of rotation of the louvers 104.
  • Side wall 3 which is not air permeable and which, together with side wall 2 forms the hopper shape of chamber 1, is pivotally coupled by means of a hinge 7 or the like to swing about its upper edge about an axis that is parallel to the axis of rotation of non air permeable wall member 5.
  • the lower edge 8 of wall 3 is pivotally coupled to support a flat wall member 9 which, together with an opposite wall 10 and two side walls 110, defines a duct 11 that communicates to feed air through the lower opening of hopper-shaped chamber 1.
  • hopper chamber 1 The upper opening of hopper chamber 1 is positioned immediately below the lower peripheral portion of a rotary drum 12, having a peripheral air permeable face or surface 42.
  • a stationary member 212 positioned within the drum 12 and coupled to a source of suction contains suction conducting channel 112 contacting the inner surface of the air permeable face 42 of the drum 12 to define those portions of the air permeable face 42 that is exposed to suction.
  • the surface of the drum exposed to suction conducting channel 1 12 is the only portion of the surface 42 of the drum 12 that is subjected to the source of suction.
  • the suction applied to the selected portion of the surface 42 of the drum 12 creates an air current which flows into the hoppershaped chamber 1 from grate 4 and partly through duct 11.
  • the air in chamber 1 is sucked through the surface of the drum.
  • a stream of cut tobacco having stems and other dense foreign matters is fed to chamber 1 by means of a belt conveyor 13 or the like.
  • the conveyor 13 unloads or dumps the tobacco into the upper opening of chamber 1 in the vicinity of the lower portion of the face or peripheral surface 42 of the drum 12.
  • the channel 112 of the stationary member 212 follows a path from a point near where the conveyor 13 dumps the tobacco to a point slightly past the top most portion of the drum 12 in the direction of rotation of the drum, as illustrated in FIG. 1.
  • Belt 13 whose speed is quite high, thrusts into chamber 1 cut tobacco intermingled with stems and various heavy foreign matters which must be separated from it.
  • the cut tobacco particles, which have failed to adhere to the drum 12 as they left the conveyor belt 13 are caught in the upward flow of air in the hopper 1.
  • the movement of air in the hopper is caused by air being sucked through the air permeable surface 42 of the drum 12 to draw air through grate 4 and through duct 11.
  • the air flow from the grate 4 mixes with the air drawn through duct 1 l to return particles of tobacco to the surface 42 of the drum 12 under the influence of suction.
  • the rotatable louvers 104 of gii'ate 4 are oriented to be inclined downward towards the inside of chamber 1 to create, in the hopper-shaped chamber 1, a whirling flow of air which helps to move the cut tobacco particles up toward the surface 42 of the drum 12. If desired, the velocity of the air flowing upward in chamber 1 from the duct 11 can be controlled by changing the angle of inclination of wall member 9 to increase or decrease the cross sectional area of channel 11.
  • Another adjustment of the flow of air through chamber 1 can be obtained by changing the angle of inclination of wall member 5 not permeable to air and/or that of side wall 3, so as to vary the shape and, consequently, the fluidic characteristics of the lower opening of hopper-shaped chamber 1.
  • the structure'of this invention can be utilized either as an independent unit or incorporated into a cigarette maker.
  • the suction drum 12 or some other operatively equivalent means such as, for instance, a suction belt, can be utilized to accomplish other functions which relate to the operation ofthe cigarette maker such as, for example, a cut tobacco braid forming device as described in US. Pat. No. 3,548,837 entitled Tobacco Rod forming Method and Device by Athos Cristiani.
  • the selected tobacco adhering to the face of drum 12 can be transferred to an appropriate means for further processing.
  • a device for the pneumatic separation of stems and heavy foreign matter from a stream of cut tobacco comprising a hopper-shaped chamber having an air permeable wall converging toward a wall not permeable to air to provide an upper opening and a lower opening, said upper opening being larger than said lower opening; manifold coupled to the lower opening of said chamber to receive stems and heavy foreign matter;
  • a duct coupled between said airlock and the lower opening of said chamber to direct air to said chamber through the lower opening thereof;
  • suction means coupled to suck air into said chamber through said air permeable wall and from said duct to move tobacco particles upward to said air permeable surface, and out of said chamber through said air permeable surface to hold tobacco particles against said air permeable surface while stems and heavy foreign matter fall down to said manifold after passing through the lower opening of said chamber and said airlock;
  • said air permeable wall comprises louvers positioned one above another each rotatably supported by a horizontally oriented shaft.
  • the structure of claim 3 including a wall member not permeable to air coupled to the lower portion of said air permeable wall.
  • the structure of claim 7 including means to couple a selected area of the air permeable face of said drum to said suction.
  • said means to couple a selected area of the air permeable face of said drum to said suction means comprises a stationary member having at least one suction conducting channel.

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  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Manufacture Of Tobacco Products (AREA)
US00105312A 1970-02-23 1971-01-11 Pneumatic separator for a stream of cut tobacco Expired - Lifetime US3727755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1249270 1970-02-23

Publications (1)

Publication Number Publication Date
US3727755A true US3727755A (en) 1973-04-17

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ID=11140797

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Application Number Title Priority Date Filing Date
US00105312A Expired - Lifetime US3727755A (en) 1970-02-23 1971-01-11 Pneumatic separator for a stream of cut tobacco

Country Status (6)

Country Link
US (1) US3727755A (enrdf_load_stackoverflow)
BR (1) BR7101165D0 (enrdf_load_stackoverflow)
CA (1) CA935728A (enrdf_load_stackoverflow)
DE (1) DE2106134C3 (enrdf_load_stackoverflow)
FR (1) FR2078239A5 (enrdf_load_stackoverflow)
GB (1) GB1305857A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024878A (en) * 1975-02-01 1977-05-24 Molins Limited Cigarette making machines
US4143665A (en) * 1977-01-21 1979-03-13 Griffin Lee E Machine for shelling beans or peas and for separating particles therefrom
US4475562A (en) * 1981-10-16 1984-10-09 Philip Morris Incorporated Method and apparatus for separating tobacco mixture into lighter and heavier fractions
FR2548053A1 (fr) * 1983-06-14 1985-01-04 Gd Spa Procede pour separer les particules de tabac sur les machines de fabrication de cigarettes
US4689143A (en) * 1986-02-26 1987-08-25 Kimberly-Clark Corporation Drum separator
US4915824A (en) * 1985-08-12 1990-04-10 Surtees Guy F Pneumatic classifier for tobacco and method
US5205415A (en) * 1991-07-10 1993-04-27 The Standard Commercial Tobacco Co., Inc. Modular classifier
US5325875A (en) * 1987-08-24 1994-07-05 Universal Leaf Tobacco Co., Inc. Apparatus for separating threshed leaf tobacco
US6435191B1 (en) 1999-02-26 2002-08-20 Dimon Inc. Tobacco separator
US7051880B1 (en) 2004-06-23 2006-05-30 Osborn Engineering, Inc. Air classifier to separate solids while eliminating emissions
US20140216991A1 (en) * 2010-01-22 2014-08-07 Vladimir Stepanovich Suhin Method for separating a free-flowing mixture in a flowing medium and apparatus for carrying out said method
USD735257S1 (en) * 2011-05-03 2015-07-28 Bühler AG Grain separator
US10399712B2 (en) 2013-12-26 2019-09-03 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US10888108B2 (en) 2015-07-30 2021-01-12 Altria Client Services Llc Slide measuring system for filling pouches and associated method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131672B (en) * 1982-12-16 1987-04-23 Rothmans Of Pall Mall Winnowing shredded tobacco
GB8324443D0 (en) * 1983-09-13 1983-10-12 Amf Inc Tobacco separator
DE10240617C1 (de) * 2002-09-03 2003-12-11 Bat Cigarettenfab Gmbh Verfahren und Vorrichtung zur Justierung der Ausselektion von Winnowings

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1530277A (en) * 1922-11-13 1925-03-17 Wonder Grain Cleaner Company Grain cleaner
US1755080A (en) * 1925-09-11 1930-04-15 Messrs Neuerburg Sche Verwaltu Means for spreading cut tobacco in cigarette-making machines
US2708033A (en) * 1951-06-12 1955-05-10 Prater Pulverizer Company Fractionator
US3034514A (en) * 1959-03-09 1962-05-15 American Mach & Foundry Foraminous rotor cigarette rod former
US3255764A (en) * 1962-03-12 1966-06-14 American Mach & Foundry Cigarette maker
US3409025A (en) * 1965-07-06 1968-11-05 Hauni Werke Koerber & Co Kg Method and apparatus for treating tobacco leaves
US3542037A (en) * 1968-02-23 1970-11-24 American Mach & Foundry Cut tobacco stemmer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1530277A (en) * 1922-11-13 1925-03-17 Wonder Grain Cleaner Company Grain cleaner
US1755080A (en) * 1925-09-11 1930-04-15 Messrs Neuerburg Sche Verwaltu Means for spreading cut tobacco in cigarette-making machines
US2708033A (en) * 1951-06-12 1955-05-10 Prater Pulverizer Company Fractionator
US3034514A (en) * 1959-03-09 1962-05-15 American Mach & Foundry Foraminous rotor cigarette rod former
US3255764A (en) * 1962-03-12 1966-06-14 American Mach & Foundry Cigarette maker
US3409025A (en) * 1965-07-06 1968-11-05 Hauni Werke Koerber & Co Kg Method and apparatus for treating tobacco leaves
US3542037A (en) * 1968-02-23 1970-11-24 American Mach & Foundry Cut tobacco stemmer

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024878A (en) * 1975-02-01 1977-05-24 Molins Limited Cigarette making machines
US4143665A (en) * 1977-01-21 1979-03-13 Griffin Lee E Machine for shelling beans or peas and for separating particles therefrom
US4475562A (en) * 1981-10-16 1984-10-09 Philip Morris Incorporated Method and apparatus for separating tobacco mixture into lighter and heavier fractions
FR2548053A1 (fr) * 1983-06-14 1985-01-04 Gd Spa Procede pour separer les particules de tabac sur les machines de fabrication de cigarettes
US4600021A (en) * 1983-06-14 1986-07-15 G. D. Societa' Per Azioni Method for separating tobacco particles on cigarette manufacturing machines
US4915824A (en) * 1985-08-12 1990-04-10 Surtees Guy F Pneumatic classifier for tobacco and method
US4689143A (en) * 1986-02-26 1987-08-25 Kimberly-Clark Corporation Drum separator
US5476109A (en) * 1987-08-24 1995-12-19 Universal Leaf Tobacco Co., Inc. Apparatus for separating threshed leaf tobacco
US5325875A (en) * 1987-08-24 1994-07-05 Universal Leaf Tobacco Co., Inc. Apparatus for separating threshed leaf tobacco
US5358122A (en) * 1991-07-10 1994-10-25 The Standard Commercial Tobacco Company, Inc. Multiple stage tobacco classifier
US5205415A (en) * 1991-07-10 1993-04-27 The Standard Commercial Tobacco Co., Inc. Modular classifier
US6435191B1 (en) 1999-02-26 2002-08-20 Dimon Inc. Tobacco separator
US7051880B1 (en) 2004-06-23 2006-05-30 Osborn Engineering, Inc. Air classifier to separate solids while eliminating emissions
US20140216991A1 (en) * 2010-01-22 2014-08-07 Vladimir Stepanovich Suhin Method for separating a free-flowing mixture in a flowing medium and apparatus for carrying out said method
USD735257S1 (en) * 2011-05-03 2015-07-28 Bühler AG Grain separator
US10399712B2 (en) 2013-12-26 2019-09-03 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US11447277B2 (en) 2013-12-26 2022-09-20 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US12304672B2 (en) 2013-12-26 2025-05-20 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US10888108B2 (en) 2015-07-30 2021-01-12 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US11744275B2 (en) 2015-07-30 2023-09-05 Altria Client Services Llc Slide measuring system for filling pouches and associated method
US12369614B2 (en) 2015-07-30 2025-07-29 Altria Client Services Llc Slide measuring system for filling pouches and associated method

Also Published As

Publication number Publication date
FR2078239A5 (enrdf_load_stackoverflow) 1971-11-05
DE2106134B2 (de) 1980-02-28
BR7101165D0 (pt) 1973-05-03
DE2106134A1 (de) 1971-09-02
DE2106134C3 (de) 1980-10-16
CA935728A (en) 1973-10-23
GB1305857A (enrdf_load_stackoverflow) 1973-02-07

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