US2815860A - Method and apparatus for separating leaf tobacco - Google Patents

Method and apparatus for separating leaf tobacco Download PDF

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Publication number
US2815860A
US2815860A US421284A US42128454A US2815860A US 2815860 A US2815860 A US 2815860A US 421284 A US421284 A US 421284A US 42128454 A US42128454 A US 42128454A US 2815860 A US2815860 A US 2815860A
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Prior art keywords
tobacco
air
separating
mass
channel
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US421284A
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Krantz Karl Gustav Evert
Lars E Bergman
Elvingson Carl-Olof
Olof G Karlsson
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Svenska Flaktfabriken AB
Arenco AB
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Svenska Flaktfabriken AB
Arenco AB
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B5/00—Stripping tobacco; Treatment of stems or ribs
    • A24B5/10—Stripping tobacco; Treatment of stems or ribs by crushing the leaves with subsequent separating

Definitions

  • This invention relates to methods of and apparatus for separating leaf fragments and stem portions of a tobacco mass from each other.
  • conventional apparatus for performing such separating the tobacco mass is over a jigger supplied to a vertical air channel, in which the separation is carried out by means of an ascending air current which carries the lighter leaf fragments with it while the relatively heavy stem portions sink in a direction opposite to said air current.
  • This mode of operation i. e. the method of causing a portion of the tobacco mass to follow the ascending air current and permitting another portion of said mass to move in a direction opposite to the air current will not afford any effective separation.
  • leaf fragments and stem parts have a tendency to form lumps which might still more impair the separation and cause breakdowns in operation.
  • disintegrated tobacco mass drops continually from a disintegrator onto a jigger 2 inclined against a vertical air channel 1 towards which the tobacco mass is conveyed by said jigger which is reciprocated by an eccentric 3.
  • the front portion of the jigger 2 forms the top wall of a box 5 and has openings 4 directed obliquely upwardly and forwardly in the direction of movement of the tobacco mass.
  • Above the box wall 2 there is another wall 7 which extends obliquely upwardly against the air channel 1 and forms the top wall of a separating chamber 8 divergent against the channel and having a bottom wall consisting of the front portion of the jigger 2.
  • the box 5 is connected to a flexible air conduit 9 having a control valve 6.
  • the channel 1 merges with an air chamber 10 which the leaf fragments enter Whereafter they are removed through a rotary sluice l1. Dust is sucked off through a rotary screen 12 connected to a suction pipe 13.
  • the pipe 13 is connected to a fan 14 the outlet of which is connected to the conduit 9 and to a branch pipe 16 having a filter 15.
  • the disintegrated tobacco mass advancing on the jigger 2 towards the channel 1 is subjected to blowing action by air currents projected obliquely upwardly and forwardly through the perforations 4 so that the lighter tobacco particles are whirled upwardly and forwardly in the chamber 8 while the heavier stem portions continue their travel towards the front end 17 of the jigger 2 at which end they sink into the lower portion of the channel 1 and drop into a receptacle or onto a conveyor.
  • the air currents projected through the jigger perforations 4 carry the Whirled up tobacco particles into the channel 1 in which they are subjected to the action of the ascending air current aiforded by the suction created by the fan 14 which air current is relatively feeble so that it will not carry ice with it the stem portions dropping into the bottom portion of the channel 1.
  • the primary separation, effected in the chamber 8, is completed by the secondary separation in the portion of the channel 1 located above the jigger end 17 whereby also lighter stem parts will sink in the channel 1 as the lighter leaf portions are sucked into the chamber 10.
  • a fan in an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging in a direction towards said lateral opening and having a bot tom with air inlet openings, means for jolting said bottom, and means for projecting air currents through said bottom into said chamber to pneumatically carry leaf particles into said lateral inlet opening.
  • a fan In an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging in a direction towards said lateral opening and having a bottom with air inlet openings, means for jolting said bottom, a conduit connecting the outlet of said fan with the air inlet openings in said bottom, and a branch air conduit connected with said fan outlet.
  • a fan In an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging towards said lateral opening and having a bottom with air inlet openings, means for jolting said bottom, a conduit connecting the outlet of said fan with the air inlet openings in said bottom and having air flow control means, and a branch air conduit connected with said fan outlet.
  • a method of separating disintegrated leaf tobacco from stem portions in a tobacco mass consisting of the steps of subjecting said tobacco mass to a preliminary separation by shaking said mass and causing it to advance in a substantially horizontal direction, projecting air currents through said mass during said shaking, and causing said projected air currents to elevate lighter tobacco leaf particles from said mass and carry them in the same direction as same mass is advacing and causing the remainder of said mass to fractionate into an upper layer of relatively light tobacco particles and a lower layer of heavier tobacco particles, and subjecting said tobacco mass to a final separation by passing the lighter tobacco leaf particles, the lighter tobacco particles and the heavier tobacco particles separately into a stream of ascending air.

Description

Dec.'l0, 1957 5 K. G; E. KRANTZ VETAHL 2,815,860
METHOD AND APPARATUS FOR SEPARATING LEAF TOBACCO ,Filed April 6. 1954 INVENTORS K. G. EVERT KRANTZ LARS E. BERGMAN,
CARL'OLOV El.- VINGSON OLOF G. K-ARLSSON Y BY MM 2 M United States Patent METHOD AND APPARATUS FOR SEPARATING LEAF TOBACCO Karl Gustav Evert Krantz, Stockholm, Lars E. Bergman,
Djursholm, and Carl-Olaf Elvingson and Olof G. Karlsson, Stockholm, Sweden, assignors of one-half to Arenco Aktieholag and one-half to Aktiebolaget Svenska Flaktfabriken, Stockholm, Sweden Application April 6, 1954, Serial No. 421,284
Claims priority, application Sweden October 14, 1953 4 Claims. (Cl. 209-466) This invention relates to methods of and apparatus for separating leaf fragments and stem portions of a tobacco mass from each other. In conventional apparatus for performing such separating the tobacco mass is over a jigger supplied to a vertical air channel, in which the separation is carried out by means of an ascending air current which carries the lighter leaf fragments with it while the relatively heavy stem portions sink in a direction opposite to said air current. This mode of operation, i. e. the method of causing a portion of the tobacco mass to follow the ascending air current and permitting another portion of said mass to move in a direction opposite to the air current will not afford any effective separation. Furthermore, leaf fragments and stem parts have a tendency to form lumps which might still more impair the separation and cause breakdowns in operation.
It is a main object of the invention to remove said inconveniences.
The accompanying drawing is an elevational sectional view of an apparatus provided with means embodying the invention.
Referring to the drawing, disintegrated tobacco mass drops continually from a disintegrator onto a jigger 2 inclined against a vertical air channel 1 towards which the tobacco mass is conveyed by said jigger which is reciprocated by an eccentric 3. r The front portion of the jigger 2 forms the top wall of a box 5 and has openings 4 directed obliquely upwardly and forwardly in the direction of movement of the tobacco mass. Above the box wall 2 there is another wall 7 which extends obliquely upwardly against the air channel 1 and forms the top wall of a separating chamber 8 divergent against the channel and having a bottom wall consisting of the front portion of the jigger 2. At its rear wall the box 5 is connected to a flexible air conduit 9 having a control valve 6.
At its upper end the channel 1 merges with an air chamber 10 which the leaf fragments enter Whereafter they are removed through a rotary sluice l1. Dust is sucked off through a rotary screen 12 connected to a suction pipe 13. The pipe 13 is connected to a fan 14 the outlet of which is connected to the conduit 9 and to a branch pipe 16 having a filter 15.
The disintegrated tobacco mass advancing on the jigger 2 towards the channel 1 is subjected to blowing action by air currents projected obliquely upwardly and forwardly through the perforations 4 so that the lighter tobacco particles are whirled upwardly and forwardly in the chamber 8 while the heavier stem portions continue their travel towards the front end 17 of the jigger 2 at which end they sink into the lower portion of the channel 1 and drop into a receptacle or onto a conveyor. The air currents projected through the jigger perforations 4 carry the Whirled up tobacco particles into the channel 1 in which they are subjected to the action of the ascending air current aiforded by the suction created by the fan 14 which air current is relatively feeble so that it will not carry ice with it the stem portions dropping into the bottom portion of the channel 1. The primary separation, effected in the chamber 8, is completed by the secondary separation in the portion of the channel 1 located above the jigger end 17 whereby also lighter stem parts will sink in the channel 1 as the lighter leaf portions are sucked into the chamber 10.
We claim:
1. In an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging in a direction towards said lateral opening and having a bot tom with air inlet openings, means for jolting said bottom, and means for projecting air currents through said bottom into said chamber to pneumatically carry leaf particles into said lateral inlet opening.
2. In an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging in a direction towards said lateral opening and having a bottom with air inlet openings, means for jolting said bottom, a conduit connecting the outlet of said fan with the air inlet openings in said bottom, and a branch air conduit connected with said fan outlet.
3. In an apparatus for separating disintegrated leaf tobacco from stem portions, a fan, a substantially vertical separating channel having a lateral tobacco inlet opening and a free bottom opening for entering air and discharging stem portions and an upper opening connected to the suction side of said fan, a substantially horizontal separating chamber communicating with and diverging towards said lateral opening and having a bottom with air inlet openings, means for jolting said bottom, a conduit connecting the outlet of said fan with the air inlet openings in said bottom and having air flow control means, and a branch air conduit connected with said fan outlet.
4. A method of separating disintegrated leaf tobacco from stem portions in a tobacco mass, consisting of the steps of subjecting said tobacco mass to a preliminary separation by shaking said mass and causing it to advance in a substantially horizontal direction, projecting air currents through said mass during said shaking, and causing said projected air currents to elevate lighter tobacco leaf particles from said mass and carry them in the same direction as same mass is advacing and causing the remainder of said mass to fractionate into an upper layer of relatively light tobacco particles and a lower layer of heavier tobacco particles, and subjecting said tobacco mass to a final separation by passing the lighter tobacco leaf particles, the lighter tobacco particles and the heavier tobacco particles separately into a stream of ascending air.
References Citedin the file of this patent UNITED STATES PATENTS 1,517,596 Stebbins Dec. 2, 1924 2,186,167 Eissrnan Jan. 9, 1940 2,208,896 Dahlstrom July 23, 1940 FOREIGN PATENTS 380,196 Great Britain Sept. 15, 1932 455,219 Great Britain Oct. 12, 1936
US421284A 1953-10-14 1954-04-06 Method and apparatus for separating leaf tobacco Expired - Lifetime US2815860A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010576A (en) * 1957-12-24 1961-11-28 Hauni Werke Koerber & Co Kg Apparatus for separating or winnowing tobacco and other like fibrous material
US3877469A (en) * 1971-10-19 1975-04-15 Hauni Werke Koerber & Co Kg Conditioning of tobacco
JPS53134178U (en) * 1977-03-30 1978-10-24
EP0148773A2 (en) * 1984-01-06 1985-07-17 Philip Morris Products Inc. Vibrating trough tobacco separator and classifier
EP0159890A2 (en) * 1984-04-14 1985-10-30 Hambro Machinery Limited Elutriator
DE3606238A1 (en) * 1985-03-11 1986-09-11 General Kinematics Corp., Barrington, Ill. VIBRATION CUTTER
US4715950A (en) * 1984-03-14 1987-12-29 General Kinematics Corporation Vibratory separation apparatus
US4776950A (en) * 1984-01-14 1988-10-11 Northern Engineering Industries Plc Classifier
US4895642A (en) * 1987-02-17 1990-01-23 Organ-Faser Technology Bv Process for separating particles of electrically non-conductive material, in particular plastics material and/or paper, from waste, and a device for carrying out the process
US4908123A (en) * 1986-04-16 1990-03-13 Kimberly-Clark Corporation Method and apparatus for removing relatively dense foreign materials from shredded paper
WO1991017835A1 (en) * 1990-05-15 1991-11-28 Duos Engineering (Usa), Inc. System for separation of materials using suction air power
US5427248A (en) * 1994-10-20 1995-06-27 Mactavish Machine Manufacturing Co. Apparatus for the separation of tobacco lamina from tobacco stem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517596A (en) * 1922-04-08 1924-12-02 Albert H Stebbins Pneumatic sizer
GB380196A (en) * 1931-07-11 1932-09-15 Carves Simon Ltd Improved process and apparatus for removing dust from coal
GB455219A (en) * 1935-04-11 1936-10-12 Westfalia Dinnendahl Groeppel Improvements in pneumatic apparatus for separating dust from coal and the like
US2186167A (en) * 1934-08-30 1940-01-09 Muller J C & Co Separation apparatus
US2208896A (en) * 1937-07-17 1940-07-23 Formator Ab Device for disintegrating and separating tobacco mass

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517596A (en) * 1922-04-08 1924-12-02 Albert H Stebbins Pneumatic sizer
GB380196A (en) * 1931-07-11 1932-09-15 Carves Simon Ltd Improved process and apparatus for removing dust from coal
US2186167A (en) * 1934-08-30 1940-01-09 Muller J C & Co Separation apparatus
GB455219A (en) * 1935-04-11 1936-10-12 Westfalia Dinnendahl Groeppel Improvements in pneumatic apparatus for separating dust from coal and the like
US2208896A (en) * 1937-07-17 1940-07-23 Formator Ab Device for disintegrating and separating tobacco mass

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010576A (en) * 1957-12-24 1961-11-28 Hauni Werke Koerber & Co Kg Apparatus for separating or winnowing tobacco and other like fibrous material
US3877469A (en) * 1971-10-19 1975-04-15 Hauni Werke Koerber & Co Kg Conditioning of tobacco
JPS53134178U (en) * 1977-03-30 1978-10-24
JPS5435404Y2 (en) * 1977-03-30 1979-10-27
EP0148773A3 (en) * 1984-01-06 1987-12-09 Philip Morris Products Inc. Vibrating trough tobacco separator and classifier
EP0148773A2 (en) * 1984-01-06 1985-07-17 Philip Morris Products Inc. Vibrating trough tobacco separator and classifier
US4776950A (en) * 1984-01-14 1988-10-11 Northern Engineering Industries Plc Classifier
US4715950A (en) * 1984-03-14 1987-12-29 General Kinematics Corporation Vibratory separation apparatus
EP0159890A3 (en) * 1984-04-14 1986-12-30 Hambro Machinery Limited Elutriator
US4755284A (en) * 1984-04-14 1988-07-05 Hambra Machinery Limited Elutriator
EP0159890A2 (en) * 1984-04-14 1985-10-30 Hambro Machinery Limited Elutriator
FR2578454A1 (en) * 1985-03-11 1986-09-12 Gen Kinematics Corp Vibrating apparatus for separating the components of a mixture according to density and/or size of particles
DE3606238A1 (en) * 1985-03-11 1986-09-11 General Kinematics Corp., Barrington, Ill. VIBRATION CUTTER
US4908123A (en) * 1986-04-16 1990-03-13 Kimberly-Clark Corporation Method and apparatus for removing relatively dense foreign materials from shredded paper
US4895642A (en) * 1987-02-17 1990-01-23 Organ-Faser Technology Bv Process for separating particles of electrically non-conductive material, in particular plastics material and/or paper, from waste, and a device for carrying out the process
WO1991017835A1 (en) * 1990-05-15 1991-11-28 Duos Engineering (Usa), Inc. System for separation of materials using suction air power
US5427248A (en) * 1994-10-20 1995-06-27 Mactavish Machine Manufacturing Co. Apparatus for the separation of tobacco lamina from tobacco stem

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