JP2005006656A - Tobacco producing machine and tobacco producing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine and method for tobacco improving faults such as secure formation of tobacco flow on a suction belt, etc. <P>SOLUTION: Minced tobacco is conveyed to an elevator 24 by a conveyer 23, and elevates as a flow of individual particles toward a suction belt installed on the end of upper exit of the elevator 24, the tobacco particles 38 are sucked, gradually gathered and form a flow of tobacco filler, in the tobacco producing machine. The elevator 24 comprises a lower first section 26 receiving tobacco from the conveyer 23 and an upper second section 27 surrounded by the suction belt. The first section 26 is formed as separated from the second section 27, and the first section 26 and the second section 27 are mutually connected together by a rotating surface of a toothed suction roller 32 for conveying uniform layer of tobacco from the first section 36 to the second section 27. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tobacco manufacturing machine and a manufacturing method.

  Prior art cigarette making machines include single or multiple process lines and typically include a feeding chamber that picks up chopped tobacco by a carding unit and delivers it to a descending channel or chute.

  At the lower end of the chute, the tobacco is transferred by a toothed supply unit to the supply conveyor where it is transported by the supply conveyor towards the lift channel or the lower entrance of the lift. As tobacco enters the elevator entrance, stems and heavy particles, or fragments, are separated from light particles, after which the stems and fragments fall into the collection container and are removed by gravity, while being processed for manufacturing. The light particles used are carried on the lift by the updraft.

  The upper end of the lift is surrounded by one conveyor in the case of a machine with a single processing line and by two conveyors arranged side by side in the case of a machine with two process lines. Although a two-step line cigarette making machine is described herein, it is not intended to limit the scope of the invention.

  Each conveyor takes the form of a substantially horizontal air-permeable suction belt capable of attracting tobacco that is sent to the lift as a continuous flow of divided particles and gradually fills it. As a continuous stream. The airflow rising from the lifter carrying the cigarettes toward the suction belt is generated by a negative pressure generated inside an elongated vacuum chamber surrounding the lower side by two belts. The tobacco stream thus formed beyond the lift outlet is sent by a suction belt to the trimming station where the tobacco stream is reduced to a predetermined uniform thickness or depth. The trimmed tobacco stream is then released from the suction belt to the entry point of the station forming two continuous tobacco rods.

  As the production tempo increases, the conventional cigarette maker in question exposes drawbacks, particularly with respect to the precise formation of the tobacco stream on the suction belt. More precisely, the increase in operating speed must on the one hand be accompanied by an increase in the linear speed of the suction belt, and on the other hand, it requires a rapid increase in the movement of tobacco particles in the lift.

  In order to quickly raise the tobacco particles to the lift as needed, the air needs to be sucked by the vacuum chamber into the suction belt with a high velocity flow. The first result of such improvement is that the density of tobacco particles increases near the surface of the suction belt and decreases substantially in a hyperbola as the distance from the suction belt increases, so that the tobacco is perpendicular to the suction belt. Due to the tendency to accumulate in a non-uniform manner in the vertical direction, the suction belt is immediately broken in the crossing direction. The second result is that due to the violent impact between the tobacco particles and the surface of the suction belt, the tobacco particles slip, roll, and the tobacco particles are distributed along the direction of impacting the suction belt and consequently following the suction belt. It becomes uneven and inaccurate.

  Other drawbacks associated with the high speed operation of conventional tobacco making machines are reflected in the unsatisfactory separation of tobacco stems and heavy fragments from light particles. In fact, when tobacco is sent quickly to the lift, the time of its separation process is reduced accordingly, and the process area of this problem in tobacco makers typically tends to be somewhat limited, with tobacco stems and heavy Fragments tend to be trapped in the upward flow when air is sent to the lift at high speed.

  An object of the present invention is to provide a cigarette manufacturing machine and a manufacturing method that are not affected by the above-mentioned drawbacks.

  The object is embodied by a cigarette maker having the features of claim 1.

  That is, the tobacco making machine according to the present invention comprises at least one rising channel for inducing at least one flow of tobacco particles, conveyor means for feeding tobacco to the rising channel, i. Including at least one suction belt operatively set adjacent to the outlet of the channel, wherein a flow of tobacco particles is formed on the rising channel into a corresponding stream of tobacco, the rising channel from the conveyor means A cigarette maker having a first portion designed to receive tobacco and a second upper portion surrounded by the suction belt, wherein the cigarette maker includes a first portion and a second portion of the rising channel. Including conveyor means for conveying a predetermined amount of cigarette from the first part to the second part interposed between parts; To do.

  According to a second aspect of the present invention, there is provided a cigarette making machine comprising a descending channel, that is, a descending passage, supply means for supplying chopped tobacco to the descending channel, a picking unit for picking chopped tobacco from the descending channel, and at least tobacco particles. Said cigarette comprising at least one ascending channel for inducing a flow, conveyor means for transporting chopped tobacco from said picking unit to said ascending channel, and at least one suction belt operatively set at the exit of said ascending channel A tobacco production machine in which a stream of particles is formed in a corresponding continuous stream of tobacco on the rising channel, and the continuous flow of tobacco is directed to the entry point of a station where it is formed into a continuous tobacco rod. Is separated from each other by the lower first part and the upper Includes a two-part, said second part said surrounded by the suction belts, and the conveyor means for conveying the predetermined amount of tobacco to contact the interposed between the first parts of the second part of the rising channel.

  In a preferred embodiment, the length of the first part is equal to the corresponding length of the second part as measured along the direction of movement of the suction belt, and the width of the first part is as measured across the direction of movement. , Larger than the width of the second part.

  In a preferred form, the conveyor means for transporting tobacco to the second part of the rising channel comprises a first sector adjacent to the outlet provided by the first part of the rising channel and forming a layer of tobacco, and the lifting It is movable along an endless passage comprising at least one second sector adjacent to the inlet provided by the second part (27) of the channel and releasing the particles constituting the tobacco layer.

  In a preferred embodiment, leveling means for leveling the tobacco layer and interlocking with a third sector interposed between the first sector and the second sector is included.

  In a preferred form, the supply means comprises carding rollers which are rotatable about corresponding axes, and the conveyor means for transporting tobacco to the second part of the rising channel produces a suction force and the carding rollers A toothed roller that is rotatable about an axis substantially parallel to the axis.

  In a preferred form, the conveyor means for transporting tobacco to the second part of the ascending channel includes toothed rollers that generate a suction force and are rotatable about an axis substantially parallel to the direction of movement of the suction belt. .

  In a preferred form, the leveling means comprises a roller in a substantially tangential position with respect to the toothed roller.

  In a preferred form, the conveyor means for transporting the tobacco to the rising channel includes at least one vibrating tray.

  In a preferred form, the conveyor means used to transport a quantity of tobacco to the second part of the rising channel comprises at least one vibrating tray.

  In a preferred embodiment, the supply means comprising a carding roller rotatable about an axis, two rising channels for guiding the flow of tobacco particles, and installed at the outlet of the rising channel and corresponding to the flow of tobacco particles It includes two suction belts formed in a continuous flow of tobacco, and the two rising channels are symmetrically installed on both sides of a vertical plane between the two suction belts and perpendicular to the rotation axis of the carding roller.

  In a preferred form, the conveyor means for transporting tobacco to the rising channel has a common first part and two mutually independent second parts extending from the common first part on both sides of the vertical symmetry plane. Includes two parts. The common first part and the two second parts independent of each other may each be composed of a vibrating tray.

  In a preferred form, each of the two ascending channels comprises a toothed conveyor roller that produces a suction force and is rotatable about an axis transverse to the axis of the carding roller.

  In a preferred embodiment, comprising two rising channels for guiding two flows of tobacco particles, and two suction belts installed at the outlet of the rising channel and forming a flow of tobacco particles into a corresponding continuous flow of tobacco, The two ascending channels are symmetrically installed on both sides of the vertical plane between the two suction belts, and each center around an axis that generates a suction force and is substantially parallel to the direction of movement of the suction belt It has a toothed conveyor roller that is rotatable.

  In a preferred form, the conveyor roller generating the suction force includes means for interrupting the suction force of the conveyor roller connected to the release sector.

  In a preferred form, further comprising means for generating a positive pressure fluid flow coupled to the release sector.

  In a preferred form, the first part of the rising channel terminates at the bottom of an inclined wall having a hole through which pressure fluid passes.

  The present invention further provides a method for producing tobacco, the method for producing tobacco according to the present invention directs the flow of chopped and carded tobacco particles into a descending channel, picking up the tobacco chopped in the descending channel by a toothed unit and at least Transported by conveyor means to the inlet of one ascending channel, causing the flow of tobacco particles to rise from said ascending channel towards at least one suction belt installed at the outlet of that channel, and for tobacco particles on said suction belt Forming a tobacco layer from a rising stream of tobacco particles at an outlet of a first portion of the rising channel; and forming the tobacco layer in a second stream of the rising channel. Transferring to the inlet of the section, forming a second upward stream of tobacco particles from the tobacco layer And characterized in that it comprises a step of inducing a second upward flow of tobacco particles to the suction belt.

  In a preferred form of tobacco production method, the step of transferring the tobacco layer includes an auxiliary step of leveling the tobacco layer.

  The present invention will now be described in detail by way of example with reference to the accompanying drawings.

Referring to FIG. 1, FIG. 1 shows a first embodiment of a cigarette maker according to the present invention, and in particular a single processing line designated by reference numeral 1 for the feeding section in the entire cigarette maker. The machine equipped is shown.
The feeding section 1 includes a feeding unit 2 that transforms the chopped tobacco mass into a continuous stream of tobacco particles. The various components constituting the supply unit 2 are accommodated in a vertically extending enclosure 3 which is delimited at the top by a horizontal wall 4 and defined on both sides by two vertical walls 5 and 6.

  The feeding section 1 has an inlet duct 7 extending upward from the horizontal wall 4, and a lower chamber 10 whose bottom is limited by a conveyor belt 11 of tobacco 9 carved inside the enclosure 3 under the duct 7. It has the roller 8 with a power drive tooth | gear sent toward

  The lower chamber 10 houses a carding roller 12 that is rotatable about a shaft 13 that crosses the side walls 5 and 6, which forms part of the carding unit 14 and is adjacent to the downstream end of the conveyor belt 11. Installed.

  In addition to the carding roller 12, the carding unit 14 includes a proportional roller 15 that is rotatable in the same direction as the carding roller 12 in a substantially tangential direction of the carding roller 12.

  With this arrangement, the chopped tobacco 9 is fed to the conveyor belt 11 by the toothed roller 8 and then directed to the carding roller 12 where it then has a thickness substantially equivalent to the radial dimension of the teeth of the carding roller 12. Nine layers are transferred by carding roller 12 from lower chamber 10 near proportional roller 15 beyond the tangential position.

  The feeding unit further includes a propulsion roller 16 that is rotatable about an axis parallel to the axis 13 described above, the propulsion roller picking up a layer of tobacco 9 from the carding roller 12 and its continuous particles. Towards a substantially vertical descending channel or chute 17 defined by two side walls 18 and 19 extending in the direction illustrated by F1 relative to each other and parallel to the axis 13 of the carding roller 12 It has a function of releasing downward.

  The lower end of the chute 17 is located facing the periphery of the toothed picking unit 20, and the picking unit 20 includes a picking roller 21 and a propulsion roller 22 connected to each other that move the chopped tobacco 9 from the chute 17. .

  More precisely, the cigarette 9 is received by the picking unit 20 in the form of individual particles, and the material chopped towards the ascending channel or ascending machine 24 surrounded at the upper end by the moving surface of the suction belt 25 by air permeable material. To the conveyor means 23 having the function of sending

  According to the present invention, the elevator 24 is divided into a lower first part 26 and an upper second part 27, and the upper end 28 of the second part 27 is surrounded by the suction belt 25. The two parts 26 and 27 are separated and are interconnected by conveyor means, indicated generally at 29, interposed between the outlet 30 of the first part 26 and the inlet 31 of the second part 27.

  The length of the first part 26 is the same as the corresponding length of the second part 27 as measured along the direction of movement of the suction belt 25 and, as can be seen from FIG. Is larger than the width of the second portion 27 as measured across the same direction.

  The conveyor means 29 may be of any type and can transfer a predetermined amount of tobacco 9 between the outlet 30 of the first part 26 of the elevator 24 and the inlet 31 of the second part 27.

  In particular, the conveyor means 29 is composed of any suitable conveying device that allows movement along a path forming an endless loop. In the illustrated example, such means includes, as shown in FIG. 1, a toothed roller 32 that is rotatable clockwise about a shaft 13 of the carding roller 12 and a shaft 33 parallel to the moving direction of the suction belt 25. It takes the form and is connected to the negative pressure fluid source 34 such that a suction force arises from the outer surface of the roller 32. As an alternative to the roller 32, a belt loop centered on a plurality of pulleys having axes parallel to the axis 13 of the carding roller 12 and the direction of movement of the suction belt 25 can be used.

  In the case of the roller 32, the loop passage has a circular periphery and includes a first sector 35 in which the layer 36 of tobacco 9 is formed, and the second tobacco particles 38 forming the layer 36 of tobacco 9 are released. Sector 37 is included.

  More specifically, the first sector 35 coincides with the portion of the roller 32 extending upwardly therefrom along the outlet 30 of the first portion 26 of the lift 24 and the second sector 37 is the first of the lift 24. Corresponding to the part of the roller 32 extending along the inlet 31 of the two parts 27.

  The passage formed by the toothed roller 32 further includes a third sector 39 interposed between the first sector 35 and the second sector 37, and the uniformizing roller 41 installed in the tangential direction of the toothed roller 32. Populated by surveying leveling means 40 which takes the form. As can be seen in FIG. 1, the homogenizing roller 41 is rotatable counterclockwise about a shaft 42 extending parallel to the axis of the toothed roller 32, and the speed of the toothed roller 32 is slightly increased. Rotate at different speeds. In this way, the homogenizing roller 41 can ensure uniform thickness of the layer of tobacco 9 by redistributing tobacco particles from the high density region formed in the tobacco layer to the bottom density region. .

  As can be seen from FIG. 1, the lower first part 26 of the elevator 24 has a lower end that terminates below the inclined wall 43, and the upper part of the inclined wall 43 conveys the cigarette 9 from the toothed pick-up unit 20. Heading to 23.

  The inclined wall 43 has a plurality of holes 44 through which pressurized fluid is sent from a corresponding source 45 described later.

  The conveyor means 23 takes the form of a first vibrating tray 46 that reduces the speed at which tobacco advances toward the inlet of the first portion 26 of the elevator 24.

  Further, the suction generated by the negative pressure fluid source 34 substantially corresponds to the toothed roller 32 at a point close to the inlet of the second portion 27 above the lift 24 and to the second sector or release sector 37 of the loop passage. Means 47 for shutting off the force and / or means 48 for generating a positive pressure fluid flow are shown in connection. Such means 48 may comprise, for example, a nozzle 49 which is connected to the pressure source 50 and forms a convergence angle with the moving direction of the suction belt 25. The suction movement of the suction belt 25 is combined with the discharge flow blown by the nozzle 49. The nozzle 49 is disposed along the supply direction of the suction belt 25 and includes components that enable efficient transfer of the tobacco 38 particles 38 from the surface of the roller 32 to the suction belt 25.

  In this way, the tobacco particles 38 are firmly adsorbed to the suction belt 25 and gradually transformed into a continuous flow (not shown), and the continuous flow emerging from the second part 27 of the lifter 24 is sucked. Advance on belt 25 toward a subsequent station (not shown) for trimming, forming, and final forming into a continuous tobacco rod.

  As will be appreciated, the width of the first portion 26 is substantially greater than the width of the second portion 27 which is substantially the same as the width of the suction belt 25 and the sector 35 forming the layer 36 of tobacco 9. The width of the toothed roller 32 is also larger than the width of the suction belt 25, so that a relatively moderate (moderate) rotational speed of the toothed roller 32 around the shaft 33, even at relatively high speed operation, Only the relatively moderate speed of the tobacco 38 particles 38 in the lift 24 allows the suction belt 25 to supply an accurate amount of the tobacco 9 and in this way sucks along the direction of movement of the suction belt 25. A substantially uniform arrangement of the cigarettes 9 is ensured on the suction surface in a vertical plane perpendicular to the belt 25.

  Similarly, and advantageously, the step of separating the tobacco 9 stem and large pieces from the small particles takes place within the spatial enclosure provided by the lower first portion 26, wherein the tobacco particles are substantially They move away from each other and move relatively slowly. The continuous selection jet fired from the hole 44 helps to improve the efficiency of the process as well, thereby separating tobacco stems and heavy fragments. Such stems and pieces 54 fall into the collection basket 55.

  2, 3 and 4 show a second embodiment of the feeding part 1 forming part of a cigarette making machine according to the invention and in particular a machine with two processing lines, ie two identical tobacco streams. 1 shows a machine equipped with two suction belts 25 forming

With respect to the structure and operation of the lift 24 and the toothed roller 32, there is no difference between this configuration and the single line of FIG. 1, as shown.
In particular, as shown in FIGS. 4 and 5, the feeding section 1 of the cigarette maker has two lifts 24 that respectively carry two streams of tobacco particles 38, and the two tobacco particles 38 are removed from the tobacco. The two suction belts 25 formed in the respective flows 9 are respectively installed on the outlet upper ends 28 of the corresponding second portions 27 of the corresponding lifting machines 24.

  More specifically, the elevator 24 and the respective toothed roller 32 are symmetrically installed on each side of the vertical surface 51 between the two suction belts 25, as can be seen from FIGS. As shown in FIG. 5, the carding roller 12 and the take-up roller 21 are positioned across the rotation axes.

  In the solution of FIGS. 2 to 5, more precisely, the toothed conveyor roller 32 rotates an angle of 90 ° with respect to the viewing plane of the drawing compared to the position of the single roller 32 shown in FIG. The rotating shaft 33 extends parallel to the axis of the carding roller 12.

  In the example of FIG. 5, the cigarette 9 is conveyed from the take-up roller 21 toward the two lifts 24 by the conveyor means 23 having a common first part 52 and a pair of mutually independent second parts 53. Two independent parts 53 diverge from the common part 52 and extend on each side of the vertical symmetry plane, and each inclined wall provided by the first part 26 below the riser 24 to which the particles 38 of the tobacco 9 correspond. It is carried to 43.

  Similar to the example of FIG. 1, each of the two sloping walls 43 of this embodiment has a plurality of holes 44 and is a continuous designed to efficiently separate tobacco stems and heavy pieces from light particles. Generate air intake. Here again, tobacco stems and heavy pieces 54 fall into the collection basket 55.

  In particular, the common first part 52 and the independent second part 53 are constituted by vibration trays 56 and 57, respectively.

  In the example of FIG. 2, the tobacco 38 particles leaving the take-up roller 21 move from right to left as shown in FIG. It falls onto the conveyor 58 inclined upward so as to be positioned.

  In this way, the particles 38 of chopped tobacco 9 advance at a measured speed towards the two lower walls 43 provided by the two first parts 26 of the lift 24. Here, the stems and pieces 54 are separated and the light particles are sent as a continuous flow upward from the first part 26 and trapped in the air flow generated by atmospheric means of general form (not shown). After reaching the first sector 35 of each toothed roller 32 that is set to rotate about the corresponding shaft 33, the flow of tobacco particles 38 gradually increases and the first portion 26 of the first portion 26 on the surface of the roller 32. It passes instantaneously at a low speed over the outlet 30 and is transformed into a layer 36. Each layer 36 of tobacco is distributed and spread by a corresponding homogenizing roller 41 and gradually advances toward the second sector 37 of the roller 32. At this point, the suction blocking means 47 and / or the nozzle 49 are activated so that the layer of tobacco 9 separates from the surface of the roller 32 and concentrates on the new flow of particles 38. The released particles exposed to the synergistic action of the air jet carried by the suction belt 25 and the corresponding nozzle 49 gradually adsorb to the suction belt 25 and transform into a continuous stream of tobacco on each particle.

  Finally, as can be seen from FIG. 3, the tobacco 38 particles 38 are released directly to the common vibrating tray 56 by the rollers 21 and 22.

1 is a schematic view of a vertical section showing a first form of a cigarette making machine according to the present invention. FIG. 3 is a schematic view of a second section of a vertical section showing a first part of a cigarette maker according to the invention. It is explanatory drawing of FIG. FIG. 3 is a schematic view of a second section of a vertical section showing a second part of a cigarette making machine according to the present invention. It is the schematic plan view which cut off the circular part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Feeding part 2 Supply unit 3 Enclosure 7 Inlet duct 9 Cigarette 10 Lower chamber 11 Conveyor belt 12 Carding roller 16 Propulsion roller 17,22 Falling channel or chute 20 Picking unit 21 Picking unit roller 24 Lifting channel or lifting machine 25 Suction belt 29 Conveyor means

Claims (21)

Adjacent to at least one rising channel (24) for guiding at least one flow of tobacco particles (38), conveyor means (23) for feeding tobacco to the rising channel (24), and an outlet of the rising channel (24) At least one suction belt (25) operatively configured so that a flow of tobacco particles is formed in the continuous flow of the corresponding tobacco (9) on the rising channel, the rising channel (24) being the conveyor means In a cigarette maker having a first part (26) designed to receive tobacco (9) from (23) and an upper second part (27) surrounded by said suction belt (25),
Conveying means (29) for conveying a predetermined amount of tobacco (9) from the first part to the second part between the first part (26) and the second part (27) of the rising channel (24). A cigarette making machine. A lowering channel (17), supply means (12) for feeding chopped tobacco (9) to the lowering channel (17), a picking unit (20) for picking up chopped tobacco (9) from the lowering channel (17), tobacco At least one rising channel (24) for guiding at least one flow of particles (38), conveyor means (23) for transferring chopped tobacco (9) from the picking unit (20) to the rising channel (24); And at least one suction belt (25) operatively set at the outlet of the rising channel (24), the flow of tobacco particles forming a continuous flow of corresponding tobacco (9) on the rising channel (24) And the tobacco (9) is directed to the entry point of the station where a continuous stream of tobacco (9) is formed into a continuous tobacco rod In Zoki,
The rising channel (24) comprises a lower first part (26) and an upper second part (27) separated from each other, the second part (27) being surrounded by the suction belt (25); and A cigarette maker, wherein conveyor means (29) for conveying a predetermined amount of tobacco (9) is interposed between the first part (26) and the second part (27) of the rising channel (24).   The length of the first part (26) is equal to the corresponding length of the second part (27) as measured along the direction of movement of the suction belt (25), and the width of the first part (26) is 3. A cigarette maker according to claim 1 or 2, wherein the cross section is greater than the width of the second part (27) as measured across the direction of travel.   The conveyor means (29) is adjacent to the outlet (30) provided by the first part (26) of the rising channel (24) and forms a first sector (35) forming a layer (36) of tobacco (9). ), And at least one releasing particles (38) adjacent to the inlet (31) provided by the second part (27) of the rising channel (24) and constituting the layer (36) of tobacco (9) 4. A cigarette maker according to any one of claims 1 to 3, which is movable along an endless path comprising a second sector (37).   Leveling means (40) leveling the tobacco layer (30) and interlocking with the third sector (39) of the conveyor means (29) interposed between the first sector (35) and the second sector (37) The cigarette making machine according to claim 4.   The supply means (12) includes a carding roller (12) rotatable about a corresponding shaft (13), and the conveyor means (29) produces a suction force and the shaft of the carding roller (12). 3. The cigarette maker according to claim 2, comprising a toothed roller (32) rotatable about an axis (33) substantially parallel to (13).   The conveyor means (29) comprises a toothed roller (32) that generates a suction force and is rotatable about an axis (33) substantially parallel to the direction of movement of the suction belt (25). 1 to 6 cigarette making machines.   7. A cigarette maker according to claim 5 or 6, wherein said leveling means (40) comprises a roller (41) in a substantially tangential position with respect to said toothed roller (32).   8. Tobacco maker according to claim 5 or 7, wherein said leveling means (40) comprises a roller (41) in a substantially tangential position with respect to the toothed roller (32).   2. The cigarette maker according to claim 1, wherein the conveyor means (23) comprises at least one vibrating tray (46).   3. The cigarette maker according to claim 2, wherein the conveyor means (29) used for transporting the cigarette (9) comprises at least one vibrating tray (46).   Supply means (12) with a carding roller (12) rotatable about an axis (13), two ascending channels (24) for guiding the flow of tobacco particles (38), and said ascending channel (24) And two suction belts (25) that form a flow of tobacco particles (38) into a corresponding continuous stream of tobacco, the two rising channels (24) being connected to the two suction belts (25). The cigarette maker according to claim 2, wherein the cigarette rollers are symmetrically installed on both sides of a vertical plane (51) perpendicular to the axis of rotation (13) of the carding roller (12).   Conveyor means (23) for transporting tobacco (9) are connected to each other extending from a common first part (52) and from the common first part (52) on both sides of the vertical symmetry plane (51). 13. Tobacco making machine according to claim 12, comprising two second parts (53) independent of each other.   14. The cigarette maker according to claim 13, wherein the common first part (52) and the two independent second parts (53) are each constituted by a vibrating tray (56, 57).   13. Each rising channel (24) comprises a toothed conveyor roller (12) that produces a suction force and is rotatable about an axis (33) transverse to the axis (13) of the carding roller (12). To 14. One of the tobacco making machines.   Two rising channels (24) for guiding two flows of tobacco particles (38) and installed at the outlet of the rising channel (24), and forming the flow of tobacco particles (38) into a corresponding continuous stream of tobacco The two rising channels (24) are symmetrically installed on both sides of the vertical surface (51) between the two suction belts (25), and each has a suction force. 2. A cigarette maker according to claim 1, comprising a toothed conveyor roller (32) which is rotatable about an axis (33) which is generated and arranged substantially parallel to the direction of movement of the suction belt (25).   A tobacco production according to any one of claims 4, 15 or 16, wherein the conveyor roller (32) generating suction force comprises means (47) for interrupting the suction force of the conveyor roller connected to a release sector (37). Machine.   18. A cigarette maker according to claim 17, comprising means (48) for generating a positive pressure fluid flow connected to the release sector (37).   A tobacco according to any one of the preceding claims, wherein the first part (26) of the rising channel (24) terminates at the bottom of an inclined wall (43) having a hole (44) through which pressure fluid passes. machine. Directing the flow of chopped and carded tobacco particles into the descending channel, picking up the chopped tobacco in the descending channel by a toothed unit and transporting it to the inlet of at least one ascending channel by conveyor means; In a tobacco production process comprising the steps of raising from an ascending channel towards at least one suction belt installed at the outlet of the channel and forming tobacco particles into a continuous stream of tobacco on said suction belt;
Forming a tobacco layer from a rising stream of tobacco particles at the outlet of the first portion of the rising channel;
Transferring the tobacco layer to the inlet of the second part of the rising channel;
A method for producing tobacco, comprising: forming a second upward flow of tobacco particles from the tobacco layer; and inducing a second upward flow of tobacco particles to the suction belt.   21. The method for producing tobacco of claim 20, wherein the step of transferring the tobacco layer includes an auxiliary step of leveling the tobacco layer.

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