US2783888A - Apparatus for separating stem portions from disintegrated tobacco mass - Google Patents
Apparatus for separating stem portions from disintegrated tobacco mass Download PDFInfo
- Publication number
- US2783888A US2783888A US421345A US42134554A US2783888A US 2783888 A US2783888 A US 2783888A US 421345 A US421345 A US 421345A US 42134554 A US42134554 A US 42134554A US 2783888 A US2783888 A US 2783888A
- Authority
- US
- United States
- Prior art keywords
- sieve
- drum
- stem portions
- tobacco mass
- separating
- 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.)
- Expired - Lifetime
Links
- 241000208125 Nicotiana Species 0.000 title description 19
- 235000002637 Nicotiana tabacum Nutrition 0.000 title description 19
- 239000012634 fragment Substances 0.000 description 11
- 239000002699 waste material Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 241001584775 Tunga penetrans Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
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
- 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 apparatus for separating stem portions from disintegrated tobacco mass and more particularly to an apparatus of that kind provided with an endless sieve, e. g. a drum or band, and stripper means for removing impurities and waste from the surface of said sieve. It is an object of the invention to prevent tobacco leaf fragments, adhering by suction to the sieve, from following the impurities and waste all the way to the stripper means which would cause losses of tobacco if said leaf fragments are to be removed together with the waste. Another object of the invention is to prevent contamination of the cleaned tobacco which would be the result if leaf fragments removed by the stripper means would be returned to the tobacco mass together with the waste.
- an endless sieve e. g. a drum or band
- disintegrated tobacco mass is supplied to a jigger 2 which delivers the tobacco through an opening 3 into a vertical separating channel 4, in which an ascending air current elevates the relatively light tobacco leaf fragments while the relatively heavy stem portions are allowed to sink down in the channel and further through a bottom opening 5 into a receptacle 6.
- the leaf fragments follow the air current out of the outlet opening 7 of the horizontal portion 4a of the separating channel 4 and enter a relatively large chamber 8 in which the leaf fragments sink down, whereafter they are removed through a rotary sluice 9 in the bottom of the chamber.
- a continuously revolving sieve drum 10 is positioned in the upper portion of the chamber 8 opposite to the opening 7.
- the drum 10 may be perforated or it may consist of wire network.
- a stationary tubular shield 11 Close by the inner surface of the drum 10 and concentrically thereto is positioned a stationary tubular shield 11 which has perforations in its front portion only, i. e. in the portion turned towards the outlet opening 7 of the separating channel 4.
- a stripper roll 13 mounted rotatably.
- the roll 13 has longitudinal fillets or lamellae 25 of a soft material, e. g. leather, which beat upon the sieve drum 18 when the roll 13 rotates.
- a plate 14 extends obliquely from the sieve drum 10 down to the rear wall 15 of the chamber 8.
- the upper edge 22 of the plate 14 is positioned close by the sieve drum 1G in the proximity of the rear vertical plane of tangency of the drum.
- the plate 14 forms one of the walls of a pocket 16 closed at its bottom and having a collecting box or drawer 17 inserted therein.
- the drawer 17 can be pulled out of the pocket 16 through a normally closed opening 18 in one of the side walls of the chamber 8.
- the ends of the sieve drum 10 are located close by the side walls of the chamber 8 and it is at one of 2 said walls or at both the walls connected to a conduit 23 which over a dust separator (not shown) is connected to the suctionsid'e of afan 20.
- the pressure side of the fan 201 s through; a conduit 24'tightly connected to the receptacle 6.
- the suction effect on the leaf fragments thatadhere to the drum 10 opposite to the perforations 12 of the shield 11 and follow the drum against the stripper roll 13 is cording as they approach said roll.
- the air gap 21 between the shield 11 and the drum 10 is so thin that the peripheral air currents in same are choked.
- the suction effect on the rear side of the sieve drum 10, turned towards the rear wall 15 of the chamber 8, is so feeble that no leaf fragments or a few fragments only will be sucked through the passage between the top portion of the drum 10 and the top wall of the chamber 8.
- Leaf fragments that do not leave the drum 10 until they reach the plate 14 may be stripped off the drum by means of the upper edge 22 of said plate.
- Fibrous and matted impurities will stick more firmly to the drum 10 than the leaf fragments but when they have reached the roll 13 they are in a zone in which the suction effect is a minimum wherefore the roll 13 will be capable of loosening them from the drum.
- an endless sieve a stem separating channel heaving an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to Said sieve and having an air inlet only in a-front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, and stripper means located at the rear side of said sieve and operatively associated with said sieve to remove waste therefrom.
- an endless sieve In an apparatus for separating stem portions from a disintegrated tobacco mass, an endless sieve, a stem separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in a front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, a roll having leather lamellae and being located at the rear side of said sieve, and said roll being mounted for rotation to cause its lamellae to beat on said sieve and remove waste therefrom.
- an endless sieve In an apparatus for separating stem portions from a disintegrated tobacco mass, an endless sieve, a stem separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in a front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, stripper means located at the rear side of said sieve and operatively associated with said sieve to remove waste therefrom, and a waste collecting pocket below said stripper means, said pocket decreased successively achaving a downwardly extending wall having an upper' nected to the interior of said shield, a roll having longiedgelocated close by the rear portion of said sieve below said stripper n1eans.
- an endlesssievega stern separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in'a 'front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit contudinal filletsflof a soft material and being located at the rear side of said sieve, and said roll being mounted for rotation to cause said fillets to beat on said sieve and remove waste therefrom.
Landscapes
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Description
March 5, 1957 E. R. DAHLSTRC'DM ET AL 2,783,888 APPARATUS FOR SEPARATING STEM PORTIONS FROM DISINTEGRATED TOBACCO MASS Filed April 6, 1954 INVEN TORS E.R. DAHLSTROM .C. 6; 3-. ROTHELIUS APPARATUS FOR SEPARATING STEM PORTIONS FROM DISINTEGRATED TOBACCO MASS Ernst Ruben Dahlstriim, Alsten, and Carl Georg Bertil Rothelius, Stockholm, Sweden, assignors to Arenco Aktiebolag, Stockholm, Sweden, a Swedish joint-stock company Application April 6, 1954, Serial No. 421,345 Claims priority, application Sweden April 29, 1953 4 Claims. (Cl. 209-295) This invention relates to apparatus for separating stem portions from disintegrated tobacco mass and more particularly to an apparatus of that kind provided with an endless sieve, e. g. a drum or band, and stripper means for removing impurities and waste from the surface of said sieve. It is an object of the invention to prevent tobacco leaf fragments, adhering by suction to the sieve, from following the impurities and waste all the way to the stripper means which would cause losses of tobacco if said leaf fragments are to be removed together with the waste. Another object of the invention is to prevent contamination of the cleaned tobacco which would be the result if leaf fragments removed by the stripper means would be returned to the tobacco mass together with the waste.
These and other objects and advantages of the invention will in part be described and in part be understood from the following detailed description of a preferred embodiment, which is illustrated in the accompanying drawing.
Referring to the drawing, disintegrated tobacco mass is supplied to a jigger 2 which delivers the tobacco through an opening 3 into a vertical separating channel 4, in which an ascending air current elevates the relatively light tobacco leaf fragments while the relatively heavy stem portions are allowed to sink down in the channel and further through a bottom opening 5 into a receptacle 6. The leaf fragments follow the air current out of the outlet opening 7 of the horizontal portion 4a of the separating channel 4 and enter a relatively large chamber 8 in which the leaf fragments sink down, whereafter they are removed through a rotary sluice 9 in the bottom of the chamber.
A continuously revolving sieve drum 10 is positioned in the upper portion of the chamber 8 opposite to the opening 7. The drum 10 may be perforated or it may consist of wire network. Close by the inner surface of the drum 10 and concentrically thereto is positioned a stationary tubular shield 11 which has perforations in its front portion only, i. e. in the portion turned towards the outlet opening 7 of the separating channel 4. Right behind or at least approximately right behind the rear side of the shield 11 is a stripper roll 13 mounted rotatably. The roll 13 has longitudinal fillets or lamellae 25 of a soft material, e. g. leather, which beat upon the sieve drum 18 when the roll 13 rotates.
A plate 14 extends obliquely from the sieve drum 10 down to the rear wall 15 of the chamber 8. The upper edge 22 of the plate 14 is positioned close by the sieve drum 1G in the proximity of the rear vertical plane of tangency of the drum. The plate 14 forms one of the walls of a pocket 16 closed at its bottom and having a collecting box or drawer 17 inserted therein. The drawer 17 can be pulled out of the pocket 16 through a normally closed opening 18 in one of the side walls of the chamber 8. The ends of the sieve drum 10 are located close by the side walls of the chamber 8 and it is at one of 2 said walls or at both the walls connected to a conduit 23 which over a dust separator (not shown) is connected to the suctionsid'e of afan 20. The pressure side of the fan 201s through; a conduit 24'tightly connected to the receptacle 6.--
Intheopera'tion ofthe apparatus the sieve. drum 10 and the stripperrol-l 13*are-rotated in the directions as shown in the drawing. Air flowing out of the outlet opening 7 of the channel 4 will mainly find its way substantially directly to the portion of the sieve drum 10 covering the perforations 12 of the shield 11 where dust is sucked in through said perforations and coarser impurities such as fibrous particles will adhere by suction to the drum and follow same in its rotary direction until they reach the roll 13 which is beating against the sieve drum so that the impurities are removed therefrom and drop into the box 17 in the pocket 14. The suction effect on the leaf fragments thatadhere to the drum 10 opposite to the perforations 12 of the shield 11 and follow the drum against the stripper roll 13 is cording as they approach said roll. The air gap 21 between the shield 11 and the drum 10 is so thin that the peripheral air currents in same are choked. The suction effect on the rear side of the sieve drum 10, turned towards the rear wall 15 of the chamber 8, is so feeble that no leaf fragments or a few fragments only will be sucked through the passage between the top portion of the drum 10 and the top wall of the chamber 8. Leaf fragments that do not leave the drum 10 until they reach the plate 14 may be stripped off the drum by means of the upper edge 22 of said plate. Fibrous and matted impurities will stick more firmly to the drum 10 than the leaf fragments but when they have reached the roll 13 they are in a zone in which the suction effect is a minimum wherefore the roll 13 will be capable of loosening them from the drum.
We claim:
1. In an apparatus for separating stem portions from a disintegrated tobacco mass, an endless sieve, a stem separating channel heaving an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to Said sieve and having an air inlet only in a-front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, and stripper means located at the rear side of said sieve and operatively associated with said sieve to remove waste therefrom.
2. In an apparatus for separating stem portions from a disintegrated tobacco mass, an endless sieve, a stem separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in a front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, a roll having leather lamellae and being located at the rear side of said sieve, and said roll being mounted for rotation to cause its lamellae to beat on said sieve and remove waste therefrom.
3. In an apparatus for separating stem portions from a disintegrated tobacco mass, an endless sieve, a stem separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in a front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit connected to the interior of said shield, stripper means located at the rear side of said sieve and operatively associated with said sieve to remove waste therefrom, and a waste collecting pocket below said stripper means, said pocket decreased successively achaving a downwardly extending wall having an upper' nected to the interior of said shield, a roll having longiedgelocated close by the rear portion of said sieve below said stripper n1eans. V
4. In an apparatus for separating stem portions from a disintegrated tobacco mass, an endlesssievega stern separating channel having an outlet for cleaned tobacco leaf portions located opposite to said sieve, a stationary shield located closely inside said sieve and conforming to said sieve and having an air inlet only in'a 'front side opposite to said channel outlet, said sieve being mounted for rotation over said air inlet, a suction conduit contudinal filletsflof a soft material and being located at the rear side of said sieve, and said roll being mounted for rotation to cause said fillets to beat on said sieve and remove waste therefrom.
References Cited in the file of this patent FOREIGN PATENTS
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE2783888X | 1953-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2783888A true US2783888A (en) | 1957-03-05 |
Family
ID=20427264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US421345A Expired - Lifetime US2783888A (en) | 1953-04-29 | 1954-04-06 | Apparatus for separating stem portions from disintegrated tobacco mass |
Country Status (1)
Country | Link |
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US (1) | US2783888A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3617030A (en) * | 1969-07-15 | 1971-11-02 | Cpc International Inc | Mixing equipment for dry vegetables |
US4689143A (en) * | 1986-02-26 | 1987-08-25 | Kimberly-Clark Corporation | Drum 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 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE661963C (en) * | 1934-11-18 | 1938-07-01 | Formator Ab | Device for separating the ribs of leaf parts from shredded tobacco leaves |
-
1954
- 1954-04-06 US US421345A patent/US2783888A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE661963C (en) * | 1934-11-18 | 1938-07-01 | Formator Ab | Device for separating the ribs of leaf parts from shredded tobacco leaves |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3617030A (en) * | 1969-07-15 | 1971-11-02 | Cpc International Inc | Mixing equipment for dry vegetables |
US4689143A (en) * | 1986-02-26 | 1987-08-25 | Kimberly-Clark Corporation | Drum 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 |
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 |
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