DE1246494B - Rod cigarette machine or the like. - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

A24c

German class: 79 b -16

Number: 1246 494

File number: M 47963 ΠΙ / 79 b

Filing date: February 7, 1961

Opened on August 3, 1967

The invention relates to a stick cigarette machine in which an uninterrupted stream of tobacco is formed on an air-permeable conveying device by means of an air flow which is sucked through the conveying device and through a channel which, in the direction of movement of the conveying device, extends over part of its length Has dimension, wherein tobacco is introduced into the channel and carried along by the air flowing through the channel to the conveyor device to the conveyor device and on this, while it is held by the air flowing through the conveyor device, forms a gradually increasing tobacco flow in height, which through the Conveyor is taken away from the channel to a point where its height is reduced by a doweling device.

It is known, after a suction air flow has passed through a tobacco flow from the suction air flow to separate the tobacco dust it contains, through a filter.

It is also known, short tobacco and tobacco dust contained therein, the in a cigarette machine occur below the distributor, to be returned to the distributor.

The object of the invention is to provide a straight-line cigarette machine of the type described above train that the resulting in the suction air flow. Tobacco dust is fed back into the tobacco which the tobacco stream is formed, and in such a way that it is not possible when loosening of the tobacco is re-separated in the distributor.

According to the invention, therefore, a dust separating device is provided, the tobacco dust from the air which has passed through the tobacco stream and conveyor, and further is a line is provided, which takes the separated tobacco dust in place of the to the conveying device leading channel, from which the dust can be deposited through the channel onto the tobacco stream before it has reached the level until the tobacco surplus is later removed.

By introducing the tobacco dust directly into the channel leading to the conveying device, it is prevented that the tobacco dust is separated again prematurely from the tobacco supply in the distributor When ^: the excess take-off remains on the conveyor device - and is processed into cigarettes .;. * · -. '·''···

Rod cigarette machine or the like.

Applicant:

The Molins Organization Limited, London
Representative:

E. Riebensahm, lawyer,

Karlsruhe, Badenwerkstrasse

Named as inventor:

L E. Morris,

R. H. F. Lee,

K. F. Thomas, London

Claimed priority:

Great Britain 9 February 1960 (4587)

. Preferably, by means of the dust separating device, part of the air flowing through the conveying device can be branched off together with the tobacco dust and the dust can be conveyed back to the duct with the aid of the branched air through the line. 'An embodiment of the invention is described in detail with reference to the drawings, namely represents
1 shows part of a straight cigarette machine, FIG. 2 is a schematic end view of the machine according to FIG. 1, partly in section and with further parts,

F i g. 3 a dust collecting device and
F i g. 4 schematically shows an electrical circuit for the machine.

The strand cigarette machine has a perforated metal conveyor belt 1 which moves in the direction indicated by the arrow below a suction chamber. A channel formed by side walls 3 and end walls 4 and 5 with a considerable distance in the direction of the conveyor belt between the walls 4 and 5 extends upwards towards the conveyor belt 1 . Air is supplied to the lower end of the channel through a perforated plate 37 in a manner to be described below. Tobacco particles introduced into the duct are carried by the air flow upwards at high speed to the Bahdl, where they form a tobacco flow .. '

709 619/200

The conveyor belt 1 and the suction chamber 2 extend beyond the end wall 4 of the channel, that is to say to the left in FIG. 1 beyond the wall 4 ; air is also drawn in from the atmosphere through this part of the belt. The tobacco stream formed here on the belt above the channel is held on the underside of the belt by suction during its movement on and with the conveyor belt 1. A take-off device removes excess tobacco from the tobacco stream; it consists of two disks 7, one of which is shown in FIG. 1 can be seen and which are below the band 1 . Downstream of the removal device, the belt 1 runs over a paper strip 8, onto which the tobacco stream held on the belt 1 by suction is transferred. When the suction fan is turned off, thereby releasing the tobacco stream, it continues to run with the paper strip and this is wrapped around it to form a cigarette rod. The Tabakteildhen be promoted by means of a spiked roller 10, a rear Weiser roller 11 and a picker roller 13 in the channel and thereby deflected by means of air, which is sucked off by a perforated roller 16 and a LeitunglS by about 90 °.

A suction pump 23 draws air from the line 15 and releases it via a diffuser 28 to the atmosphere in the direction of a perforated plate 37 . Another suction pump 32 sucks air from the suction chamber 2 and releases it through a line 34 via a battery of dust collectors 35 to the atmosphere. In the line leading to the suction pump 23, a dust separator 25 is provided, and the dust extracted here is guided through a pipe 36 into the line 33 , which leads to the inlet of the suction pump 32 .

On the part of the conveyor belt 1 above the channel, the tobacco forms from the end wall 5 , next to which the first tobacco particles get onto the belt, to the point at which the belt emerges from the channel on the end wall 4 , the tobacco flow increasing Depth. The device? the excess tobacco furthest from the belt 1 decreases.

The air sucked through the tobacco and the tape takes the tobacco dust with it, including any short tobacco particles. At least some of the tobacco dust so separated from the tobacco flow is fed back into the tobacco flow. For this purpose, a dust separating device 39 is provided in the line 34 (see FIG. 3), which leads from the outlet of the suction pump 32 to a battery of cyclones 35 . The dust separator device corresponds to the dust separator 25 and consists essentially of a cone 40 with passages. The dust, which has a greater kinetic energy than the air carrying it, will try to stay in the axis of the cone and pass through an exhaust pipe 41 , while the air passes through the passages of the cone into the pipe 34.

The exhaust pipe 41 is attached to an arm 42 pivotally mounted at 43 (see FIGS. 3 and 4), so that the exhaust pipe forms, as it were, a valve which, between the two in FIG. 3 is adjustable in full lines or in the positions shown in dash-dotted lines. As shown in FIG. 4 to be seen, the armature of a solenoid 45 is connected to the right end of the arm 42 , while at the

The left end of the arm engages a spring 46 which pulls it in the opposite direction to the working direction of the solenoid.

Aligned with the exhaust pipe 41 in its 5 * first position there is a pipe 47 (FIG. 3) which is inserted into a pipe 48 which, as shown in FIGS. 1 and 2, through the perforated plate 37 leads to the lower end of the channel 3 .

The upper end of the flue pipe 41 is ίο smaller in diameter than the pipe 47 so that all of the dust that passes through the flue pipe will enter the pipe 47 when the flue pipe is in its first position. When it is in the second position, the exhaust pipe is directed past the pipe 47 to the side.

F i g. 4 schematically shows a circuit by means of which the setting of the exhaust pipe 41 can be controlled automatically. A motor 50 for driving the conveyor belt 1, the drum 10 and the rollers 11 and 13 is connected to a power source 51 and a switch 52 is provided therebetween. Correspondingly, a motor 60 is used to drive the suction pumps 23 and 32; it is connected to a power source 61 via a switch 62 . The circuit of the power source 70 for energizing the solenoid 44 includes two switches 53 and 63 in series. The switch 53 is coupled to the switch 52 and is opened when the switch 52 is closed and vice versa, and the switch; 63 moves together with switch 62 and opens when switch 62 is open and vice versa.

The device works as follows: when the machine is operating normally, switches 52 and 62 and consequently switch 63 are closed, but switch 53 is open and the solenoid is not energized, so that the spring pulls the trigger tube 41 into the position in which the tobacco dust sucked off by the air flow in the line 34 is guided into the pipe 47 and via the pipe 48 to the inlet of the channel. The dust is directed up the channel and deposited on the tobacco already on the belt. As shown in the drawing F i g. 1, the outlet of the tube 48 is about one third the width of the channel from the wall 4 so that the dust is deposited on the tobacco on the belt 1 which is about two thirds the depth of the tobacco stream. The remaining tobacco for the tobacco stream is deposited on the dust when the belt moves towards the end wall 4 . Downstream of the wall 4 , the dust is drawn against the conveyor belt 1 by the induced draft. About a third of the tobacco stream is later taken off as excess by the take-off device 7; a considerable part of the dust will therefore be in the middle part of the tobacco stream after which the excess has been removed.

If the production of the cigarette rod is to be interrupted, the motor 50 is stopped.

'O set, but the motor 60 which drives the pumps 23 and 32 continues to run to keep the tobacco flow on the conveyor belt 1 . As a result, tobacco dust 'could be sucked out of the stagnant tobacco stream on the belt 1 and into one place

> 5 of the tape pass over the channel, so that when the tape moves again, the tobacco flow in this area will be inadmissibly heavy due to the accumulation of dust, thereby clogging

Claims (4)

can occur at a subsequent point on the machine. However, the switch 53 is closed when the SD holder 52 is opened and the motor 50 is stopped. Since the switch 63 is also closed, the solenoid 45 is energized and pivots the lever 42 clockwise and thus the exhaust pipe 41 into the position shown in FIG. 3 position shown in dot-dash lines; the dust separated by the dust separator is thus diverted to the dust separators 35. The switches 53 and 63 and the solenoid 45 thus form a control for the automatic adjustment of the exhaust pipe 41. As can be seen from FIG To regulate suction air to be separated dust. Claims: 20 1. Rod cigarette machine in which an uninterrupted stream of tobacco is formed on an air-permeable conveyor device by means of an air stream which is sucked through the conveyor device and through a channel which in the direction of movement of the conveyor device has a considerable dimension extending over part of its length, wherein Tobacco is introduced into the channel 'and is entrained by the air flowing through the channel to the conveyor device to the conveyor device and on this, while it is held on the conveyor device by the air flowing through, forms a gradually increasing tobacco flow, which through the conveyor device of the channel is taken away to a point at which its height is reduced by a removal device, characterized by a dust separating device (39) which separates tobacco dust from the air which has flowed through the tobacco stream and the conveying device (1) , and by a Line (48), which guides the separated tobacco dust to the point of the channel leading to the conveying device (1) , from which the dust can be deposited through the channel onto the tobacco stream before it has reached the level at which tobacco is later removed, so that the tobacco dust gets into the part of the tobacco stream that remains on the conveyor and is processed into cigarettes. 2. A stick cigarette machine according to claim 1, characterized in that part of the air flowing through the conveyor device (1) can be branched off together with the tobacco dust by the dust separating device (39) and the dust can be conveyed to the channel with the aid of the branched air through the line (48) is. 3. Apparatus according to claim 2, characterized in that downstream of the first dust separator (39) a second dust separator (25) is arranged in a known manner and a valve (49) is provided which is adjustable so that the tobacco dust in the leading to the channel Line (48) or to the second dust separator (25) can be guided. 4. Apparatus according to claim 3, characterized by an automatic control device by which the valve (49) is controllable so that the dust, when the conveyor (16) moves, in the line (48) and when the conveyor is stationary and Air flows through the conveying device, can be guided to the second dust separating device, the control being effected for example with the help of an electric solenoid (45) which can be controlled by switches (53, 63) , which are controlled by switches (52, .62) for controlling the Electric motors (50, 60) for driving the conveying device and a blower for generating the air flow through the conveying device can be actuated. Considered publications:
German patent specifications No. 266 385, 843 076. 1 sheet of drawings 709 619/200 7.67 © Bundesdruckerei Berlin