US2656840A - Tobacco spreader for cigarette making machines - Google Patents

Description

Oct. 27, 1953 R. FELLMANN ,8 0

TOBACCO SPREADER FOR CIGARETTE MAKING MACHINES Filed May 2, 1950 Fi g. 2Q A INVENTOR.

RUDOLF FELL MANN Patented Oct. 27, 1953 TOBACCO SPREADER FOR CIGARETTE MAKING MACHINES Rudolf Fellmann, Pragu signor of one-hall tional Corporation,

e, Czechoslovakia, asto The Skoda Works, Na-

Plzen, Czechoslovakia Application May 2, 1950, Serial No. 159,446 In Czechoslovakia July 9, 1949 Claims. 1

My invention relates to tobacco spreaders for cigarette making machines which include a tobacco feed drum and a tobacco scraper drum within a tobacco hopper or other container. In such machines a tobacco layer or carpet is formed upon the feed drum and the scraper drum rotating in a direction opposite to that of the feed drum is arranged to brush over the surface of the tobacco carpet carried by the feed drum and to brush back any surplus tobacco which may be carried thereby. My invention refers more particularly to means for tamping or compressing the said tobacco layer or carpet to a homogeneous density so that the same will be even and uniform.

It has already been suggested in the art to arrange a plurality of tampers, crushers or other compactors in the bite of said rollers on the tobacco supply side and in addition thereto separate raking means arranged to disperse and to trim tobacco accumulated in said space. As the raking operations and the tamping operations have to be timed the separate tamping and raking devices did not always properly cooperate and they required rather complicated driving means. In addition thereto the raking means which were arranged alternately with the tamping means did not act upon that portion of the tobacco carpet which come under the action of the tamping means.

The object of my invention is to avoid the said disadvantages and other disadvantages which will appear from the following description of an illustrative embodiment of my invention.

The essential feature of my invention consists therein that the tamping and raking operations are performed by the same operational member. For this purpose I use compactors, tampers or the like which are provided with raking projections and which in addition to the up and down movement for the tamping operation perform a timed swing movement away from and back towards the scraper drum. In a preferred embodiment I use tamping bodies or other compacting bodies which are provided with raking projections and are pivotally connected to a reciprocating supporting member, the pivotal connection permitting said tamping bodies to swing away from and back towards the scraper drum in the interval between two succeeding tamping operations so that during the first part of said swing movement the raking projections upon the tamping bodies disperse and trim accumulated surplus tobacco. The pivotal connection between said supports and said tamping bodies will permit the latter to adjust their position during the tamping 2 operation to effectively conform to the surplus tobacco heaped up in front of the bite of the drums.

The objects of my invention will be more fully understood from the following specification when taken with the accompanying drawing in which Fig. 1 shows a side view of my new tamping device,

Fig. 2 a top view thereof.

Fig. 3 a side view of a tamping body in an intermediate position during its swing movement and of the adjoining parts of the driving mechanism, and

Fig. 4 a detail later more particularly referred to.

The same reference characters indicate the same parts in all figures.

The tobacco spreader illustrated in Figs. 1 and 2 comprises a carded tobacco feed drum 2and a carded tobacco scraper drum l which are arranged within a hopper or other storage chamber not shown in the drawing. The scraper drum 1 which rotates in a direction opposite to that of the feed drum 2 brushes over the surface of the tobacco layer or carpet carried by the feed drum 2 removing any surplus tobacco which may be carried thereby. The said rollers may be driven in any convenient manner.

The tobacco in front of the bite of said rollers I and 2 is compressed against the carding of the feed drum 2 by a plurality of tapers or other compactors 8 which are raised and then permitted to fall upon the tobacco layer. Each of these tampers 8 is supported at the end of the longer arm of one of a plurality of swing levers, two such levers 4 and 5 being shown. These levers are rotatably mounted upon the shaft 3 which is parallel to the axes of said drums l and 2. Each swing lever is formed by two parallel fiat irons or the like. The shorter arms thereof are connected by a cross plate 6 and the longer arms thereof by a pin 7 which pivotally supports one of said tampers or compactors 8.

The said swing levers 4, 5 perform a reciprocating movement about the shaft 3 so that the tampers 8 move up and down and perform the required tamping operation upon the tobacco layer carried by the feed drum 2. Neighboring swing levers 4, 5 perform said reciprocating movement alternately that is one lever swings upward while the other lever swings downward and vice versa.

In Fig. 1 the tamper 8 attached to the swing lever 5 is shown in its lifted position and the tamper 8 attached to the swing lever 4 in its position at or near the end of the downward tamping with one end eccentrically connected to said 1 sprocket wheel 24 and. with its other end to a crank web 22 which is fixed to said shaft 3 im parting to the same the said rotational swing movement; A toothed segment is; is also fixed on said shaft 3 and this segment 1c opei s as shown in Fig; 4 over a pinion 2; with angthe'ij toothed segment 29 fixed upon another shaft 1] which is parallel to shaft 3. Thus th shaft l -1 f is forced to swing simultaneously with'but in 'a direction opposite to the shaft 3. I8 are alternately fixed upon the shafts 3 and I1, re ecti el a d cash (if said arms 5 d 8 V by iheans of a set screw [6 upon the cross. late 6 of one of "said swing levers so that the tamper & supported by said swing lever is lifted at i s st r n po i i n fe th t mp g o rati wtce p n s id tamt i f lls d wnw rd u d r its (w th are pa hfo e- Ac'ording to my invention each tamper 'or other compactor 8 is pivotally connected to its suppottine wing lever i and s, respectively 'so the n? he win a y r nd a k awards the tate: lr i a d a h said ta'nlpers is provided with raking projections 9 and PQSfiibly l3 acting upQnthe tobaccofaocumw lated in front of the bite'of the drums i and 2. The said swing movement of each tamper 8 is effected in the interval between two succeeding tamping operations by a driving mechanism operating as renews;

Each tamperfi is piovide'd'on its iront fa'c'e with an upwardly extended cover plate l2 the upper parser which. c prates with an arm 2"; x-+ vided with a pulley 28;. The arms 21 are fixed upon said it 26 a 'd neighboring arms 27 are angqiariy shittecl by 180. A spring at arranged on the pin 1, or es. eac tamper a towards the per qr Q11; win he understoo that the rotating arms 21 through theirpulle'ysifi and said se er a e 12 w l sm e, he r spective tamper '8 a ai from the scraper drum 'I after the tam-per, 'we'stposition upon completing of veineia (Figs. 1 and 3") that'the ro ctions and possibly i will be operfdurir 1g this part of the swing movement. T etainpers '8' aier'eleased by sai'd'arms 21 for a turnsw'ing movement towards the scraper drum 1 ulhderthe influence of said springs i0 assoo'n as the tamper '8, for example; the one attached torswing lelver as illustrated in Fig 1, hesitshighestposition. The position-lofeach b swung amper 8 may be controlled by an ad sting screw ll. mounted upon each swing lever A, '5, and cooperating with a stop face e reneed ,up h a e 8- Althoughonefform of my invention has been sh and described way of illustration, it will bbavell underst pid that my inyention may be construct 'dinfvarious. other embodiments which coine'wi'thin the scope of the appended claims.

What 1 claim asrnyi'U ention is:

'1. In a tobacco spreader for cigarette making machines including 'a tobacco feed drum 'anda tobacco scrap-er drum cooperating therewith, the improvement comprising in combination a plurality of fiat-faced tamping bodies to compress the tobacco upon said feed drum, said bodies mounted in front of the bite of said drums, an

-the scraper drum, driving means to effect the up and down swinging movement of said sup poft's in alter-hating order, and driving means to fEct a swinging movement of each tamping body aw y from h sc a per drum immediately after 6st position. preader for cigarette making a es its low 2; a teb ccc machines including a tobacco feed drumiand a tobacco scraper drum cooperating therewith, the

improvement comprising in combination a plurality of fiat-faced tamping bodies to compress the tobacco upon said feed drum, said bodies mounted in front. of the bite of said drum a plurality of par'auei "swing levers oscillating in planes perpendicular to the, axes or said difilifis an articulate. c nn cti b tween each of "said levers and each tampin body to support the same swif gably thereupon, resilient means holdmg each tar'hpihg bi'dy tilted towards. the bite Of he nun aking projections upon each tamping body to hiove surplus tobacco awayrrom the scraper dr'u driving "mean to effect; theup and down swi ging movement 01 said levers in alternatin 'crde'if', and 'drivingmeans to. effect. a swinging movement of each tamping bod-y away from the $613931 drum immediately after it reaches its, lower iho'st, position.

3,. In a tobacco preau'eri accordin to claims, cooperating ad v g means upon each Swing lever and each, tamp ng b'ody piv'otally 'cb' ir'lcted thereto "tof'cointrol the degree or arm motion of each ta'r'in'aing body relative to the supporting Swing lever.

'4. In a tobacco. spreader according to claim, 2,, driving mean? to effect the saidfswin movement or said levers in alternating order comprising a first shaft. arra iged in parallel to the of "said, "(1' ins, said first Shaft/supporting said levers for free pivotal movement thereupon, driving mean to impart a rotational swing movement to said first haft, a second shaft arallel to, a t haft driving meansto pat to, "said second shaft a rotational swing movement ino file-direction tofthat of the first shaft, and a pluralityof arms fix'ed alternately to the first shaft and to the second shait respectively, each "arm adaptedfto impart tQ. one swin lever the saidfsjwing movement inamanie l i e'f dicular to. theaxis Of the scraper "drum,

In a tobacco, spre denror cigarette making 478,437 Germany June 26, 1929

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