DE1196107B - Device for forming a stream of tobacco for the manufacture of cigarettes or the like. - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

Number:
File number:
Registration date:
Display day:

A24c

German class: 79 b-12/10

1196 107
A34099III / 79b March 2, 1960 July 1, 1965

Device for forming a stream of tobacco for the production of cigarettes or the like.

Applicant:

American Machine & Foundry Company, New York, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. W. Meissner

and Dipl.-Ing. H. Tischer, patent attorneys, Berlin 33, Herbertstr. 22nd

Named as inventor:

Jesse Randolph Pinkham, Raleigh, N.C.

(V. St. A.)

Claimed priority:

V. St. ν. America March 9, 1959 (798 023)

The invention relates to an apparatus for forming a tobacco stream for the manufacture of Cigarettes or the like with a shaft for the upward movement by means of a suction air stream Tobacco shower and at the upper end of the shaft arranged suction conveyor for the on this too forming tobacco stream as well as the strand conveyor belt or cigarette paper strips assigned to the suction conveyor for the cigarette rod to be formed.

This well-known suction conveyor, which is arranged at the upper end of the shaft, is usually a circulating one Suction conveyor belt formed, but because of its comparatively considerable length, support guides at least required for his workload. Because it also has a certain airtightness required and therefore some sliding friction between the edges of the suction conveyor belt and the support guides is unavoidable, careful training is required if unwanted wear on the suction conveyor belt and the support guides is to be avoided.

It is the task to avoid such sliding friction for the suction conveyor of the tobacco stream
the invention. ^

For this purpose, the device according to the invention is characterized by a ring-shaped suction chamber and at its end that the suction conveyor consists of half of the strand conveyor belt each with a known number of suction disks arranged one behind the other as seen in the direction of movement of the strand conveyor belt
part of its circumference under the action of suction air 30
stand.

By using the suction disks according to the invention, a suction conveyor is therefore created, the parts of which are inherently form-retaining and therefore none

Require support guides so that the sliding 35 suction pads increasing and at their end horizon-friction the existing risk is undesirable.

wear and tear is avoided. In contrast, the suction disks are in a further refinement

Danger of wear even when the edges of the approximately perpendicular plane are rolled over all the way in alignment Suction discs on top of one another as a result of the then only in front of the length of the shaft for the tobacco shower existing rolling friction is reduced. Arranged one behind the other through the 40, in a known manner Training according to the invention is therefore also provided with suction openings and only one of its surrounding surfaces comparatively high conveying speed of the on part of its circumference under suction Suction conveyor allows. standing, but alternately the lower

According to a further feature, the suction side is the surrounding area of the one and the upper side of the discs are in an approximately horizontal plane all around the next 45 suction disc under suction, other stepped partially overlapping between the while the last suction pad above the strand shaft for the tobacco shower and the strand conveyor belt or the cigarette paper belt, both are arranged in opposite places, so that the tobacco on this one Covering segment-like, arranged and falling in a, supported by a known compressed air ring area the disk surface with suction openings 50 chamber.

provided, with one above each suction disk. The invention is described below for example

this comprehensive hand of the drawings explained on about half the circumferential surface, namely shows

509 598/69

air chamber for the tobacco stream to fall from each of the suction discs onto the strand conveyor belt are provided.

It also proves to be advantageous in the device that to support the falling of the Tobacco from the suction disc below each compressed air chamber a scraper is arranged, as well as that Strand conveyor belt according to the graduation of the

i 196 107

3 4

F i g. 1 is a schematic side view of an Ausplatte 27 moved around, which in connection with FIG

leadership shape, front plate 29 a in a known manner upwards

F i g. 2 forms a plan view of a plurality of directed duct 24 in which the air and the

Suction discs which, in a side view, are directed as a part in tobacco towards the center of the fan 21,

F i g. 1, 5 thereby completing the circuit.

F i g. 3 is a side view of the FIG. 2 Ge around the outlet of dust-laden air to the outside

showed suction pads, to prevent a flexible roller 19 is provided,

F i g. 4 details of a single perforated one which presses tightly against the roller 16 and around which

Suction disk, the fan housing 18 extends to a labyrinth

F i g. 5 is a side view of the FIG. 1 ίο seal that blocked the passage of air single disc, prevents. At the upper end of the plate 25 is a similar

F i g. 6 details of a suction disk with respect to the roll 23 provided against the foremost

the removal of the roller that carries the conveyor belt 12, which is formed on its surface, presses. Same

deten tobacco stream, also pushes against the upper end of the plate 25,

F i g. 7 shows a side view of a second recess 15 whereby a further seal is created

management form that practically no air can pass through. Consequently

Fig. 8 is a front view according to Fig. 7 in Rieh- the air present in the device is un-

direction of arrow A , interrupted by the fan, downwards by the

F i g. 9 details of the construction of the second tobacco shower, around the lower edge of the plate 27 and

Embodiment applied suction discs, 20 revolve upwards towards the center of the fan.

Fig. 10 Details of the transmission of the tobacco It thus results that a strong directional flow from one suction disc to another, change occurs when the air flow hits the tobacco

11 shows a possibility of showering the suction pads 22 around the lower edge of the plate 27

to keep resilient relative to each other, wears. This is followed by heavier tobacco particles, such as

Fig. 12 shows an embodiment of the perimeter of the 25 tobacco stems or impurities that are heavier

Suction discs and as the tobacco fibers are, not the airflow around

13 shows a second alternative embodiment, ^{the edge of the} vertical plate 27. These particles

the circumference of the suction discs. are thrown out of the air stream and

As shown in Fig. 1, the tobacco 10 will fall in on the circumferential closure 28, approximately the device is inserted and rests on the usual feed wheel, and are inserted into the cells or belt 12. The conveyor belt 12 moves in arrow pockets on the circumference of the fastener 28 transrichtung, the tobacco being ported against the rotating one, from where it is due to the gravity card drum 14 is pressed. The carding action falls into the box 30 and entder therefrom Drum 14 will be able to be removed due to this. This usual procedure for derbandl2 exerted pressure filled with tobacco. 35 Separation of the tobacco stems from the tobacco fibers The drum 14 rotates in the direction of the arrow and this is known as a sighting.

Drum 16 disposed above drum 14 rotates in the path of the upwardly moving air and air in the direction of the arrow, so that the suction disks 32, 34, 36, 38 in the prongs of the tobacco shower are on-carding superordinate held on the drum 14, each suction disk on its outer shell Tobacco against the main supply through the 40 rand in a ring area with the disc across Rotation of the drum 14 is brushed back, whereby penetrating suction openings 31 are provided. with a substantially uniform flow of tobacco these openings have sufficiently small penetration remains through the space between the knife to allow the passage of tobacco fibers prevent the drums against a rotating sensor, but are sufficiently large to prevent the 20 is performed. A conventional scraper arm 17 limits 45 air to pass through. In reference to the amount of tobacco that has passed between the drums 14 and onto the FIG. 1 it follows that the air that the 16 entry. Tobacco moved up to the chute 24, directly

The pick-up 20 pulls the tobacco out of the card through the openings in the disks 32 on its dierungszinken and throws it in a tobacco path to the fan 18 passes through, however shudder 22 down. In accordance with the 5 °, adjust the tobacco fibers on the surfaces of the discs Practice is the axial length of the drums to be placed and so at a passage through the 14 and 16 and the width of the entire loading openings. So becomes a tobacco device about 1 to 1.20 mm, the flow being built up to the openings 31 in the disc Take-up roller 20 to cover thrown down tobacco 32. As generally shown in FIGS. 2 and 3 shower also has this width. Shown across 55 is a plurality of slices overlapping the full width of the feed provided immediately in front of the space between one the drum 16 is a centrifugal fan 18 on-wall of the feed and the opposite ordered, which is made up of a number of cells, to be filled in, with components being provided, so that it is actually a multitude of genes through which an uninterrupted series of tobacco-blowers acts that are arranged side by side. 60 particles built up on the underside of the discs The fan rotors are on a joint that is due to the rotation of the diame-shaft discs carried. This fan sucks air in the tral opposite to the receiving point of the Center around the shaft 21, the air being guided in arrow tobacco. From this point the direction from the circumference of the blower against the tobacco particles to the strand conveyor or the paper pick-up roller 20 is ejected. A 65 lane 72 is thus fed.

The suction discs 32 are created by a shaft 76

Schauer 22 takes it and drives it downward against the or the shafts 78, 80, 82 and 84 to

Plate 25 and around the lower end of the vertical so to control the speed and this of the

5 6

speed of the strand conveyor belt 72 adjust. Plates 110 and 112 shivered these details

The F i g. 1, 2 and 3 show the graded or over-usual type.

Lapping arrangement of the disks, by means of which the formation of the tobacco flow limited between the plates 110 and 112 on one side of the same shower is made possible against a rotating roller 114. From here, the tobacco is thrown over 5, which is provided with openings and an internal suction source at a further point on the strand conveyor belt 72, which causes the tobacco to stick. So that the tobacco stream removed from the undersides of the suction and further transport is not possible over a longer distance individual suction io 110 an air barrier is provided, which slices from a roller correspondingly inclined over rollers 93 and 94, 120, an endless belt 118 and a second guided. With reference to FIGS. 4, 5 and 6 roller 121 consists.

Details of the components are shown by means of which the belt 118 is transported to the strand conveyor belt 72 at the same speed as the roller 114 provided with openings is ported. 15 driven, whereby the roller and the belt move between the shaft 24 for the tobacco shower together with the tobacco, whereby the and the strand conveyor belt 72 the tobacco suction discs are guided without air passage from one zone into the approximately horizontal plane surrounding each other can be. On the inside of the stepped partially overlapping roller 114, a shoe 116 is arranged overlapping in segments, in order to lower the suction at one point and break it in an annular area of the disc surface, whereby the tobacco on the circumference of the roller Suction openings 31 are provided, each of which is released above each one and so one can easily be accommodated in an air stream of a suction disc over about half the circumference, which then flows in the usual length of the annular suction chamber and in the way upwards into the shaft 119,
the end of which is above the strand conveyor belt 72, 25 each. The wide strand conveyor belt 72 are provided. In order that the duct 119 should be chosen in such a way that to support the falling of the tobacco, a scraper air velocity can be sufficient to pass through 74. However, in order to entrain an unevenness in 3 ° tobacco fibers delivered to the roller 114, the tobacco fibers formed on the surface of each disc should be avoided To prevent other serious contamination, extension plate 33 is provided under each pane. These contaminants fall down into the container 126 that corresponds to the shape of the suction chamber 40 35 above and can be removed therefrom. This is at a distance from the As in FIG. 7, the upper portion of the foraminous suction disc 32 is arranged to narrow the air duct 119 to permit an efficient passage of the tobacco flow. Transport of the tobacco fibers upward against the flow of tobacco should be of uniform thickness to allow for 40,128. It goes without saying that several prevent clogging of the suction openings. Suction discs 128 across the width of the feed Here, the air flow against those suction can be arranged at a distance
Directed openings that are less covered. As mentioned, the hollow suction disk 128 is now distributed over the suction disks in an even, in contrast to the suction disks 32, 34, 36, 38 of the tobacco. 45 of the first embodiment is not on its disc. From the above description, it is also evident on its circumferential surface with suction that is provided obliquely upward to the cigarette rod openings around the tobacco stream moved upwards by the fan 122 device over the rollers 94 Air passes through the circumferential surface of a plurality of streams of uniform thickness into the hollow interior of the suction device. The F i g. 7 to 13 show a further 50 disc to allow without a passage from embodiment. According to FIG. 7 the tobacco 102 tobacco particles is possible. This brings a tobacco into the spreader's storage container and forms a stream through which the air can pass resting on the conveyor belt 100. This conveyor belt and via the tubes 130 to the filling chamber 124 moves the tobacco 102 forward against the cardan can return.

roller 104 rotating in the direction of the arrow. 55 The structure of the tobacco fibers on the circumference of the carding is due to the suction disk 128 is essentially uniform. Conveyor belt 100 exerted pressure with tobacco. The suction disc 128 is filled by means of a chain 136 and. The tobacco is then driven upwards under the sprocket 134 which moves roller 106 on the disk shaft and passes through it. 132 is arranged. A valve is provided. The roller 106 rotates in the direction of the arrow, and by means of which the tobacco that is excess on the inside of the suction disc is brushed back. As shown in FIG. 11, the suction disk 128 is flowed through the drum 104 against the doffer - one of a plurality of suction disks 140, 146, the roller 68 passing through it . A scraper arm 107 delimited so that the full width of the operating amount of tobacco which is covered between the drums 104 and 65 sending device.
106 enters. The doffing roller 68 rotates and the tobacco stream formed on the circumferential surface of each suction disk takes the tobacco from the prongs of the carding is not - as in the first one. The tobacco is then pointed down between the embodiment - on a moving one

Conveyor belt is deposited, but is successively transferred from one suction disc to the next Transferred the full width of the load, with a thicker drum on each subsequent drum Tobacco flow is built up, which is attracted by the air flow. The last suction pad transfers the entire tobacco on the tobacco web or the paper tape.

The F i g. Figure 9 shows a pair of adjacent suction pads that are over for the row of suction pads the width of the load are typical. A shoe 142 is arranged inside the suction disk 128, whereby the suction in the part covered by the shoe cannot be effective. By the adjustment of the shoe, as shown in FIG. 9, the suction can only occur through the openings take effect in the lower half of the suction disc. On the circumferential surface of the suction disc is a thin stream of tobacco formed. When the suction disc rotates in the direction of the arrow, the thin one becomes Tobacco stream moved to the next suction disc 140. At their tangential points, the shoe 142 separates the Suction from the inside of the suction disc, removing the tobacco from the peripheral surface of the same is sucked to the next suction disk 140.

In this way, the stream of tobacco is transferred from the suction disk 128 to the suction disk 140 and from here over the upper half of this suction disk to the next.

At the same time, air passes through the lower half of the suction disc 140 to draw in more tobacco. This tobacco is combined with the stream of tobacco flowing from the previous suction disc around the Suction disk 140 is dispensed.

The process is repeated from suction disc to suction disc over the entire loading width, so that the tobacco hanging on the last suction disk 146 (FIG. 11) is made up of many layers has been. The suction discs can either be stationary or, as in FIG. 10 shown, thereby allowing a variable thickness tobacco stream to pass therethrough. Each suction pad has an arm 150 pivotally mounted at 148 on the frame.

Each suction disc connection is pulled to one side by a spring element 152, so that each suction disc rests resiliently against the adjacent one. This allows the stream of tobacco to pass through wherein the suction discs can follow any change in thickness of the tobacco stream to the required Maintain pressure at the junction between the streams that flow on the neighboring Suction discs are transferred. This creates a homogeneous stream of tobacco. The on The tobacco stream exiting at the end thus consists of a plurality of smaller streams of practically more uniformity Density stratified under pressure to form the final stream. This allows Irregularities in the tobacco flow are compensated for and a greater uniformity is achieved will.

Another advantage is that the air when it passes through the suction disc in the moved substantially at right angles to the suction disk circumferential surface.

The tobacco flow generated by a plurality of suction disks is thus sent to the last suction disk 146 transferred. Below this is a cigarette paper web 148 is arranged on the endless belt 150 is moved, which is then fed to the cigarette rod device.

This embodiment is shown in FIG. 11 and is effected by means of a shoe which has the suction effect interrupts and thus releases the stream of tobacco. If necessary, this shoe can be exposed to air pressure stand to facilitate the detachment of the tobacco stream. There is also a scratch provided, by means of which the tobacco stream is delivered to the cigarette paper web 148.

The suction pads, such as those identified by the reference numerals 128 and 140 as a typical example are reproduced, can be made approximately in a smooth cylindrical shape, this by the tobacco stream can only be separated when it is transferred from one to the other. Optional These disks (see Fig. 12) can be designed with a recessed circumference to allow for the thickness of the tobacco flow to be adjusted, whereby the tobacco flow between these drums is less Is subjected to pressure.

To prevent dust-laden air from escaping from any connections in the housings, the outlet of the fan can be provided with a branch 154, which is connected to a valve the end of which is provided, whereby smaller amounts of air can escape from the circuit. Through this it is avoided that tobacco-laden air can escape from existing gaps in the system.

Claims (5)

Patent claims: 1. Device for forming a stream of tobacco for the production of cigarettes or the like. With a shaft for the tobacco shower moved upwards by means of a suction air stream and at the upper end of the shaft arranged suction conveyor for the to be formed on this Tobacco stream and the strand conveyor belt or cigarette paper strips assigned to the suction conveyor for the cigarette rod to be formed, characterized in that the suction conveyor from several seen in the direction of movement of the strand conveyor belt (72) one behind the other arranged suction disks (32,34, 36, 38) consists in a known manner only on a part their circumference are under suction. 2. Device according to claim 1, characterized in that the suction discs (32, 34, 36, 38) in an approximately horizontal plane circumferentially stepped and partially overlapping between the Chute (24) for the tobacco shower (22) and the strand conveyor belt (72), both on opposite sides Points arranged in a segment-like overlapping manner and in an annular area of the disc surface are provided with suction openings (31), one above each suction disc about half the circumferential length comprehensive annular suction chamber (40) and at the end above the strand conveyor belt (72) a known compressed air chamber (56, 58, 60, 62) for the Fall of the tobacco stream from each of the suction disks (32, 34, 36, 38) onto the strand conveyor belt (72) are provided (FIGS. 1 to 6). 3. Apparatus according to claim 2, characterized in that to support the ab- if the tobacco falls from the suction disc (32, 34, 36, 38) a scraper (74) is arranged below each compressed air chamber (56, 58, 60, 62). 4. Apparatus according to claim 2 or 3, characterized in that the strand conveyor belt (72) increasing according to the steps of the suction disks (32, 34, 36, 38) and at their end is horizontal. 5. Apparatus according to claim 1, characterized in that the suction disks (128, 140, 146) are arranged in an approximately vertical plane running around the length of the shaft (24) for the tobacco shower (22) one behind the other, in a known manner on their peripheral surface with suction openings ( 31) and only part of its circumference is under suction are, but alternately the underside of the surrounding area of the one and the top of the next suction disk are under suction, while the last suction disk (146) is arranged above the strand conveyor belt (150) or the cigarette paper belt (148) , so that of that Tobacco falls on this, supported by a known compressed air chamber. Considered publications:
German patent specifications No. 531459, 539 063, 226, 543 323, 570 536, 629 640, 640 440, 833, 683 555; British Patent Nos. 764 591, 780 108;
U.S. Patent No. 2,629,385. For this purpose 2 sheets of drawings 509 598/69 6.65 © Bundesdruckerei Berlin