DE2045398A1 - Device for forming a tobacco rod on a cigarette machine - Google Patents

Description

Device for forming a tobacco rod on a
Zi ^ aretfcenmaschine

The invention relates to an apparatus for forming a coherent tobacco rod on machines for producing of cigarettes.

ihs are known cigarette machines that operate by suction
work an irregular continuous strand of fiber tobacco, which is cut or combed into a regular continuous strand shape of fiber tobacco in the sucked state.

In a known device, the Vaaertabakstrang duroh air anuMuganden suction rollers have been used, which have openings on their cylindrical circumference, welohe the

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ORIGINAL

Suck fiber tobacco and in this sucked up state Cut an even layer thickness during the Excess cut tobacco is returned to the tobacco supply. Another known device is the fiber tobacco is pneumatically fed to an air-permeable belt via a vertical duct, onto which it is pressed by suction of the air and transferred to the cutting point of the excess tobacco, from where the cut tobacco is returned to the tobacco supply.

Both devices »those known to everyone after the pneumatic Conveyor principle of the fiber tobacco working and a regular tobacco rod forming devices are typical, have further disadvantages in the possibility of stopping the tobacco rod at the transition points 'Pabak3tz * ans between the conveyor belts and the suction roller and in the short service life of the air-permeable conveyor belts which are subject to wear by friction against the molding groove.

The invention avoids these disadvantages and uses a vertical air duct and a suction roll with an air-permeable infinite conveyor belt, which practically eliminates friction against the channel, Conditions for an increase in production minimal ötorena possibilities and low demands to the service,

The \ vases of the invention are based on the fact that the device aura forming the tobacco strand through a narrow vertical

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j-uft shaft is formed for the supply of the fiber tobacco by compressed air and by a rotatable suction roller, which eats stranded on its cylindrical surface with a channel, the bottom of which is air-permeable. The vertical air shaft is provided directly below the suction roller, with its upper edge resting against the surface of the suction roller with a clearance required for smooth rotation.

The suction roller is expediently supported by a stable Inner ring formed in which in part of the cylindrical Surface formed a Uiiterdruck suction chamber is. The stable inner cylinder is attached to a hollow shaft; it is from a rotatable one, from the inner cylinder worn outer rim with radial suction channels, which extend against the outer surface of the rim expand / fester.

The bottom of the groove of the peripheral surface of the suction roller is designed as a flat ring with openings of any shape Eliminating the slack of the endless air-permeable conveyor belt, or it is formed directly by the endless conveyor belt is formed, which wraps around part of the circumference of the suction roller, or it is directly through the endless air-permeable conveyor belt is formed, which wraps around the entire circumference of the suction roller in the form of a ring.

The essence of the invention is shown below with reference to an embodiment shown schematically in the drawing explained in more detail. Show it:

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IPig. 1 shows a general view of the cigarette machine in elevation, in which an endless air-permeable conveyor belt is used, which partially has a channel wraps around the circumference of a cylinder surface, on the circumference of which the tobacco rod is also cut is made;

Pig. Figure 2 shows an alternative embodiment of a combination of one vertical channel and a rotatable suction roller with the air-permeable transfer belt with a Cutting device for the tobacco rod outside the surface of the suction roller;

Pig. 3 shows a section through the machine along the line I-I in Pig. 1;

Pig, FIG. 4 is an elevation in section along the line II-II in FIG Pig. 3;

Pig. 5 is an enlarged view of part of a suction roller from Pig. 4;

Pig. 6 shows a section along the line IXI-III in Pig. 5;

Pig. Figure 7 is a plan view of part of a suction roll Pig. 5.

Like from the piss. 1 and 3 can be seen, has the arrangement a vertical shaft 1 for the kit taking of the fiber tobacco 2 by an air flow upwards against a air-permeable band 3 »which wraps around the suction roll 4 in a groove 5 which is on the cylindrical surface the suction roller 4 is formed by a flat ring 6 made of metallic or non-metallic material is, with openings of any Perm-Pig. 6, 7 and by shims 8, 9, which the cylindrical surface the suction roller 4, the belt 3 and the ring 6 transferred.

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Alternatively, the bottom of the channel 5 on the cylindrical surface of the suction roller 4 can be formed directly by the air-permeable band 3, which wraps around either the entire circumference of the suction roller 4 or part thereof. The chin 5 is used to form the tobacco rod 10 on the air-permeable band for the purpose of taking it away near the top in the arrow direction. The passage of the air under negative pressure for the purpose of taking the fiber tobacco 2 to the air-permeable belt 3 enables the fiber design of the tobacco, openings of the air-permeable belt 3, openings 7 of the flat ring 6, radial suction channels 23 of the suction roller 4 and finally the hollow shaft 11, in which negative pressure is generated will. The trimming device 12 for cutting excess tobacco is provided either directly above the cylindrical surface of the suction roller 4 - fig · 1 - »or outside the suction roller 4 under the air-permeable transfer belt 13 - FIG. 2 -. The suction roll 4 \ consists of two main parts, the fixed inner cylinder - Fig. 3 - and the rotatable outer rim 15. The inner j! The cylinder 14 is placed on the hollow shaft 11 and firmly connected to a sleeve 16, for example by screwing on, the beech 16 being fastened to the full end of the hollow shaft 11, which is itself fastened to the machine frame 17. The hollow shaft 11, from which air is sucked, is provided with radial suction grooves 18, while the inner cylinder 14 of the suction roller 4 has a vacuum chamber which merges into a split suction recess that takes up a quarter of the cylindrical surface of the inner cylinder 14. The Inneneylinder 14 j is set so that the suction throughout the Punktione- \ ground the suction roller 4 acts i when transferring the tobacco rod ·. "10 The outer rim 15 of the suction roller 4 can either;

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be made from one piece or from two logs 21, 22 be put together - FIG. 6 -, which are connected, for example, by means of screws. Within the The outer ring 15 has radial suction channels 23 formed in a radial fashion over the entire circumference - FIGS. 4, 5, 6 -, which are widened in a funnel shape at their ends near the outer circumference of the ring 15, they can if necessary calibrate in the direction from the inside of the rim 15 to the outside expand the cylindrical circumference evenly along its length. The air-tight belt 3 runs from the upper layer 24 of the suction roller 4 in a horizontal or slightly inclined direction against the guide roller 25, from where it leads back to the surface of the suction roller 4 already in the space of the vertical shaft 1.

The mode of operation of the arrangement is as follows: The Jasertobacco 2 is moved upwards by the air flow Im vertical shaft 1 and - as in Pig. 1.2, indicated - against the bottom of the channel 5 on the cylindrical The circumference of the suction roller 4 is sucked in. Dadiirch is in the gutter 5 of the suction roller 4 on the outer surface of the air-permeable conveyor belt 3 is a continuous tobacco tube uneven thickness formed »the so-called tobacco rod 10, which at a certain point of the suction roller

- Fig. 1 - or on the air-permeable conveyor belt 13

- Fig * 2 - by the device 12 to a certain Dioke tailored and means of the air-permeable Volume »13 for further processing on known devices the cigarette machine is continued. The compressed air, which the laser tobacco 2 through the vertical shaft to the surface of the suction roll 4 against the air-permeable

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liana 3 and receives the tobacco rod 10 on the air-permeable belts 3 and 13, the tobacco layer applied to the air-permeable belt 3 passes through openings in the air-permeable belt 3, through openings in the flat ring 6 and, if used, through radial suction channels 23 arranged in a radial pattern - Pig. 4 - through the vacuum chamber 12, through the suction recess 20, where it enters the cavity of the shaft 11, which is connected to a known suction device not shown in the drawing.

The suction of the tobacco carried along in the channel 5 by the air-permeable belt 3 on the surface of the suction roller 4 goes up to the upper layer 24, where the air-permeable band 3 also forms the surface of the suction roller 4 can leave and where the tobacco rod 10 is a second air-permeable Volume 13 takes over for the purpose of further funding «

Advantages of the described arrangement are primarily that through a suitable combination of the vertical conveyor shaft and the suction roller with the air-permeable conveyor belt, the combined elements have the significant property that when an air-permeable conveyor belt is used in any of the alternative designs mentioned, the service life of an air-permeable belt is many times over was increased because this conveyor belt is not subjected to high wear in the channel, as is the case with known cigarette machines of this type, where the durability of the air-permeable belt does not meet the requirements, so that the economy

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iiliii! ,,

the operation is thereby significantly influenced. aside from that is the supply and removal of the tobacco rod cur and carried out by the suction roll in such a way that the j-.oglici-reit of stopping the tobacco rod at the U L er gangs te Il en given is. The whole construction of the arrangement is valid thus essential for .Bilden a cigarette machine with very high operating performance compared to the existing state of the art while limiting the The tendency to malfunction to a minimum.

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Claims (1)

atentans ρ return: Device for forming a tobacco rod on a>. iga ret c en machine,
characterized, that they have a narrow vertical air shaft (1) for the Supply of pas he tobacco. (2) by compressed air and a rotatable Has suction roller (4) which is provided on its cylindrical surface with a channel (5), the bottom of which is air permeable. 2, device according to claim 1,
characterized, duL; · the vertical air duct (1) directly under the suction roll (4) is provided, whereby it by means of its upper! {Different with one required for a smooth turning There is play on the surface of the suction roller (4). 3. Device according to claim 1,
characterized, that the suction roller (4) is formed from a stationary inner cylinder (14), dousen cylindrical surface as Unterdruok -., Augkammer (Vj) and which is fixed on a hollow shaft (11), and also from a rotatable, from the inner cylinder (14 ) worn outer rim (15) with radial suction channel, en (k: 3) bui.teht, v /> / lch <j widen towards the uuW'Ji'e surface of the Krunzus (i ^l ). 4. Apparatus according to claim 1, dad ίγοϊι gektanzeichen, daü the inrlon of the chins (j) dnv umi '.' ingu cylinder surface 1098 15/1372 bADQBIÖINAL Suction roll (4) as a flat Hing (6) with any openings Form is designed to eliminate the slack of the infinite air-permeable conveyor belt (3). 5. Apparatus according to claim 1,
characterized, that the bottom of the channel (5) is directly permeable through the endless air Conveyor belt (3) is formed, which wraps around part of the circumference8 of the suction roller (4). 6. Apparatus according to claim 1, characterized, that the bottom of the channel (5) directly through an endless air-permeable conveyor belt (3) is formed, which wraps around the entire circumference of the suction roller (4) in the form of a ring. 109815/1373 Blank page