US2342803A

US2342803A - Device for the forming of tobacco rods in cigarette machines

Info

Publication number: US2342803A
Application number: US254576A
Authority: US
Inventors: Herrmann Paul Johannes
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-06-13
Filing date: 1939-02-04
Publication date: 1944-02-29
Anticipated expiration: 1961-02-28
Also published as: GB511013A; GB499096A; FR838718A; DE665222C; DE678070C

Description

Feb. 29, 1944. P. J. HERRMANN DEVICE FOR THE FORMING 0F TOBACCO RODS IN CIGARETTE MACHINES 2 Sheets-Shut 1 Filed Feb. 4, 1939 QNVflNTOL mun-s. Ham mm wv'ronuev- Feb. 29', 1944. 2,342,803

DEVICE FOR THE FORMING OF TOBACCO RODS IN CIGARETTE MACHINES P. J. HERRMANN 2 Sheeis-Sheet 2 Filed Feb. 4. 1939 amen-Yon 9km, Q-Hkk MANN L) 3:, 41gb wvro aw.

Patented Feb. 29, 1944 DEVICE For; THE FORMING QFw TOBACCO RODS IN CIGARETTE MACHINES Paul Johannes Herrmann, Dresden, Germany; vested in the Alien Property Custodian Application February 4, 1939, serial No. 254,576 In Germany February 7, 1938 2 (llailms- The invention relates to a device forthe forming of a tobacco'rod for rod'ci'garette machines, in which the tobacco rod is formed in a roove provided in the periphery of a. wheel rotating" in" a vertical plane over art of which a tobacco enclosing belt is placed.

The tobacco rod which is formed in thegroove is conveyed by way of a bridge into the wellknown shaper', in which it is provided with the tissue'paper covering.

The transposition of the tobacco rod to the bridge has been accompanied with dimfculti'es, and one of the objects of this invention isto'pldvide means to overcome thes'ame.

For this purpose, the invention consists'of means cooperating with the tobacco roof as it leaves the groove of the wheel and enters upon the bridge, enabling the removal" of the beltfrom the bridge, and its facile replacement over the bridge.

The invention has further for'its object to separate from the belt as it passes over the bridge any adhering tobacco; and for this purpose" the invention consists in means cooperating with the belt to separate adhering tobacco therefrom-and discharge it to the bridge so as to enable it to form part of the tobacco rod as itis beingen'- veloped by the paper. I

The invention willbe' more-fully dc'scribedhereinafter, shown in the embodiments illustrated in the drawings, and will be finally pointed Outin the claims.

In the accompanying drawings:

Figure 1 is a general side view, partially in vertical cross section, thedr'awingshowing a broken off portion, as the structure of that part of the machineforms no part of theinvention';

Figure 2 isa vertical cross sectiontaken on line II-II of Figure 1, seen in the direction of the arrow applied to "line II-II;

Figure 3 is an enlarged side view of the parts between the compression wheel and the rod former showing the arrangement of thebelt, the reversal pulley, the scraping device, the bridge between the former and wheel for translation" of the tobacco rod and the tobaccorod papersupply'.

Figure 4 is a partial plan view of the tobacco rod as it leaves the groove of the wheel and of the bridge;

Figures 5 and 6 are vertical sections taken along the lines V-V' and VI-NI of Figure .3, seen in the direction of the arrows applied to said lines; and

Figure '7 is a front view oil-the laridgashowri in Figure 4, with the belt" roller applied. thereto.

Referring to the drawings, and more particumay to Figure 1, the structure there" shown is known, and will not bcdescrib'ed in detail; eX- v oeptas such old parts are" necessary tO'P'O Iit' out the improvement The c ga et r to acco r d CQn eY b t' 2 paper .24" and former 22a" a'ct in a manner well known, The wh l 14 h s peri hera p o d [5 to form the rod by means of the'belt 5, which extends over thejwhe i l4" about n half of its circumference; The return or the belt 5' is Over pulley rollers I and i d h n over a ro ler As known, the to acco is fed iv th'e m l, shown Figu e whi h passes r he rollr and the tobacco drops into a vertical and conical channel 3'. The tobacco discharges upon a; U- shaped portion 4 Of the belt 5, this for'rjn' being given to the be t by i s passage through" t channel, shaped support 6". The tobacco in this U-shaped v,form of the belt is conveyed to the wheel M, where the tobacco entersthe giQov'efllS, and the belt flattens itself against the wheel M.

The improvement consists in the de'ViCE provided for moving the uppe most end of t e elt whre'itiis' b 'nt bai upon-i elf over the roller l6, out: of the P'a'th of the bridge 20, to enable access to be had thereto, and in the adjustment of ftlie belt at itsloviermost end where it also doubles upon itself when passing over the roller- Referrirrg to Figure the tobacco'rod' formed in the groove i5 isremoved therefrom by the guide lates- 26 and 21' having" a slot in which the bridge-2011sdis osed. A pianview of this-structure is" shown in Figures; The rod of tobacco as it leaves the" wheel [4 maintained as area by the an r the be t .5; as t is extended frdih right to left in F gur 3' beyond the Wh l s as to'enable the rod tob'e enveloped by the paper 24", passing over the roller 25. The moving

belts

5 and 22 then coact to thrust the rod and paper irrtothe former 22a. The rod; enveloped by the paper is conveyed by th'e'bjelt '22 passing over the ro11'er2'3j,tbthekniie (not-sh w is t ansp i on of t e r d o" the former, as the" rod emerges from the wheel; has given convsiclerable' trouble in the practical working of rod f rm ng machines utilizing wheels and'be t lsr Toenableready'accessto be had to'thebridgez 0, the" belt extension from ther'oller 36to'the roller [6 is made seas tor-e"; capable ofbem iliitediand piit' out'of the way; ,FQrthlSfPu iPbSe', in t e; bOdi-menlf' shown; the shaft or the iblier; in addition to acting as a shaft for the roller, acts to pivotally support; two parallel bars 3| and 32, which in turn support the ends of the shaft 38 of the roller I8. Transversely to the free ends of the bars 3| and 32, and forming a closed frame therein, is a scraper device 28, and a deflecting extension 39. When it is desired to examine the bridge 20, the frame formed of the bars 3| and 32 and cross bar 33, with deflector 39, is moved on the pivot shaft 35, and raised to the position shown in dotted lines in Figure 3. Thereby access is had to the tobacco rod a, while being enveloped by the paper 24, to the former 22a, to the bridge 20, and to the surfaces 26 and 21, and to the wheel M with its groove I5. By thus turning the roller l6 up and rearward, the belt 5 becomes slackened, and for the purpose of taking up this slack, the roller 1 is made movable, as

seen in Figure 1. The shaft of this roller I is journalled in a movable support or slide 8. Upon this support 8 are fish plates 9, between which and the plates H springs in are arranged, which pull the plates 9 constantly in the direction of the arrow there shown, the plates H being'firmly fixed in the groove plate 6, (Figure 2) The slide 8 is held and guided by two guide pins l2 having heads, which pins are attached to the floor of the plate 6, and which project into a set-off and correspondingly long slot l3 of the slide. The extreme left position reached by the tension roller 1 is indicated by broken lines (Fig. 1). Thus, when the roller [6 is moved up and back, and provides a slack in the belt, this slack is taken up by the movement of the roller 1' from full line position to dotted line position in Figure 1; and when the roller I8 is moved from dotted line position, as shown in Figure l, to full line position, the roller 1 takes the full line position. The belt portions which traverse the groove 6 and which contact with the wheel l4, remain unaffected, the other portions of the belt adjusting themselves over rollers l1, l8 and I9.

In continuation of the groove Hi there is formed, in the region of the bridge 28, a channel whose floor consists of the bridge and which has the width of the groove, as is apparent from Figure 4. The bridge 28 has an extension 2|.

The surfaces 26 and 21 have together a width equal to the width of the wheel M, as seen in Figure 4, and at their rod discharge ends are inclined upwardly, to the position where an adjustable scraper 28 rests against the belt 5 passing over the roller l6. Thereby the inner edges of the

channel walls

26 and 2! move apart, so that there results a widening to the

lines

29 and 30, as seen in Figures 4 and 6. At the same time, the edges are rounded off in the region of these lines. With a gradual widening of the channel along the

lines

29 and 38 the contact of the channel edges with the belt 5 running on the roller It occurs at points which are continuously changing, a fact which contributes materially to the preservation of the belt. The scraper 28 is in this connection constructed .as wide as the unfolding of the edges of the channel permits, and in consequence there'- of the scraper sweeps not only that portion of the belt which is situated in the region of the channel groove, which corresponds in its dimensions to the wheel l5, but also those portions of the belt which are situated to the sides thereof, so that any particles of tobacco which may possibly still adhere there are removed by the scraper.

The two side walls 3| and 32 have at their for ward end a transverse strip 33, to which the scraper 28 'is displaceably attached by means of screws 34, and to which the cap 38 is attached by means of screw-s 40. The shaft 35 is firmly supported in the machine frame. The side walls 3| and 32, which together with the transverse strip 33 form a swinging frame, have their lower ends resting on the machine frame 31 and thereby limit the swinging of these walls downward (Figure 5). The arrangement is made in such a way that the center of the axis of rotation 38 of the reversal roller [6, when the latter occupies the operating position in accordance with Figure 3, is situated lower than the center of the shaft 35. By this toggle joint action, the roller [5 is normally held in down or operative position.

The swinging frame may be lifted to the inoperative position indicated in Figures 1 and 3 in broken lines by any suitable means The swinging frame is automatically held fast in the operating position by the tension of the belt, when the axis of roller I6 is below that of the roller 36.

It has been seen that the belt 5 has been arranged to extend forward at the point of the removal of the tobacco rod, 1. e., in the region of the upper vertex of the wheel [4, and provided with a guide roller I6, to such an extent away from the bridge 28, this being a critical point which requires constant supervision and which must therefore above all things be readily accessible.

Now in order that, when the roller carrier walls 3| and 32 are swung out of the operating position, the belt 5, whose length of path is thereby shortened, shall not become slack, the arrangement has been made, that the guide roller 1 at the other end of the endless conveyor belt 5 is displaceably mounted on the machine frame. The displacement of the roller 1 is accomplished as above disclosed by means of the springs I8 together with the slidable mounting plate 8 to which the shaft of roller 1 is journalled.

In this manner a compensation takes place, which, however, extends only to that portion of the belt 5 which serves for belt return from the upper terminal guide roller 16 to the lower terminal guide roller 1, while the belt portion situated in the tobacco feed groove and also the belt portion placed around the upper terminal guide roller l5 are not touched by this compensation.

Also, a scraper 28 is provided which acts against the belt 5 situated on the roller It to remove the particles of tobacco which may possibly have been carried along by the belt 5, and which is constructed broader than the tobacco rod groove 15, so that it can also remove particles of tobacco sidewise of the belt portion which covers the groove.

Furthermore, it has been seen that in the region of the bridge, and as far as the junction with the shaper conveyor belt, a channel has been provided, the floor of which is formed by the bridge 20. At the point where the belt is led back over the roller carried by the swinging frame, the side walls of this channel, the

surfaces

26 and 2! hereinabove set forth, are extended upward as far as the scraper. In accordance with the invention, however, these side surfaces, at the reversal point of the belt, commencing from the width of the channel, are gradually widened outward and are here rounded off, in which connection the widening is greater than the aforesaid width of the scraper. In this way the result is attained that the particles of tobacco, which are removed from the belt by means of the scraper over a greater width than that of the groove, are conducted from the widened side walls to the exposed tobacco rod, and furthermore, that at the point of reversal the belt is not subjected to rapid wear, as would be the case if the wall of the channel were continuously drawn upward in the width of the channel, in which case a friction would always take place on the belt in two concentric lines, whereas in this arrangement the drawn-apart channel boundary comes in contact with ever new belt portions.

I have described several embodiments of my invention, butit will be clear that changesmay be made within the principles of the invention described, without departing from the scope of the subjoined claims.

What is claimed is:

l. A machine of the character described comalong the upper bight of said belt, said guide members having upturned end portions with divergent inner walls, means for permitting movement of said upper bight away from the bridge to expose the latter, said outward movement occasioning slack in the outer run of the belt, means for automatically taking up the slack in the outer run of the belt occasioned by such outward movement of the upper bight and preventing such slack from being appreciably transferred to said inner run and a scraper blade adjacent said upper bight, cooperating with said belt at a point above said outwardly divergent inner walls of the guide members for removing adherent tobacco particles from the belt.

2. In a machine of the character described, a grooved wheel rotatable in a vertical plane, for forming a tobacco rod, a belt having'an inner run extending about a portion of the periphery of said wheel to compress the tobacco rod, said belt having also a return run forming upper and lower bights, a roller at the upper bight of said belt, a bridge disposed below the inner run of g