US2028145A - Tuber - Google Patents

Description

I T. E. COTY Jan. 21, 1936.

' TUBER Filed June 1, 1932 6 Sheets-Sheet l Jan. 21, 1936. 1. mm 2,028,145

TUBER FiledJune 1, 1952 6 Sheets-Sheet 2 A TTO EY.

' INVENJLOR. 6% Wm Jan. 21, 1936. v v I 5 (:QTY 2,028,145

TUBER Filed June 1, 1932 6 Sheets-Sheet 3 T. E. COTY Jan. 21, 1936.

TUBER Filed June 1, 1932 6 Sheets-Sheet 4 I INVENTOR.

H HIIIIII ATTORNEQ Jan. 2-1, 1936. T. E. can? 2,028,145 r TUBER Filed June 1, 1932 6 Sheets-Sheet 5 I BY W fl 8: ATTORNEY.

Patented Jan. 21, 1936 v 2,028,145

UNITED STATES PATENT OFFICE Applicatigl; 614,820

My present invention relates to processes and from the moisture in the paste; then when the apparatus for forming blanks from a tube to be machine is started again, the tension on the used in the manufacture of paper bags. It has paper stretches it and throws it out of registry, particular application to so-called multiwall or the web may even be torn. The additional or bags composed of a number'of layers of heavy auxiliary feeding rolls interposed between the 5 paper, some of which are formed into a bottom rolls of paper (it is. to be understood that the for the bag, the other end being open, or closed rolls weigh several hundred pounds apiece, and with the so-called valve end. The process in as already stated, there may be five or seven of its essential elements consists of cutting-out porthem which makes the load at starting very tions of the inner layers of the multiwall bag, heavy) and these additional rolls take up this 10 d then assembling the layers into a web and load at, the time of starting so that all that the cutting off blanks at theline of the cut-out porrolls in advance of the cut-out apparatus have tions, so that the blanks may be used to form to do is to draw the amount of paper which bags of the type shown, for example, in my Letis in the machine against the tension, which puts Generally the best way of carrying out the process, may warp or stretch slightly at starting, I prois to assemble-all of the plies of paper into a, vide in the additional or auxiliary rolls interweb and then to carry the inner plies through ruptions of the circumferences which register with the machine in one plane and the other plies in one another once at each revolution, and thus other planes, and performing the cut-out operamomentarily release the tension and allow the 20 tion on the inner plies while the plies are sepapaper to be straightened out by the pull of the rated in this way; then reassembling them into advance rollers, thus synchronizing the action of a web which passes to the tuber; after the web the two sets of rollers upon the web, and making is formed into a t b as hereinafter described, the. tension substantially uniform between them. it passes on to acut-out knife which registers I have found this to be a suflicient provision, but 25 with the places in the web where the inner plies I do not mean to exclude other means of equalizar ut off, In passing through the apparatus ing the traction of the two sets of rolls, since so before it reaches the tuber I arrange means for far as I know that is broadly new. pasting the plies together so that they may not In the manufacture of the larger kinds of bags 80 slip upon one another while they are being formed the practice has arisen of running the web 0 into a tube. Additional details are hereinafter through printing devices and then rolling it up described. again upon a mandrel, for use later. When a The apparatus in general consists of a source web thus treated 'is threaded through a tuber of supply, usually one or more rolls of paper, deor bottomer it will often be found that the drypending upon whether a multi-ply bag is being ing of paper in dry weather or the absorption 35 formed or not, generally there being from 3 to 7 of moisture from the air in damp weatherhas plies of the paper; an apparatus for operating thrown the print out of registry with the thumbupon the inner plies to form the cut-outs; in knife and cut-off knife in the tuber; that is, addition there is feeding means in advance of these knives are apt to mar the print because the apparatus. To obviate a trouble which has the bag blank is a little bit shorter or 'longer 40 sometimes occurred I also employ between the than it ought to be. Heretofore it has been rolls of paper and the apparatus for forming the necessary to change the sizes of the rolls or to web additional or auxiliary feeding rolls. In the use change gears to vary their relative speeds apparatus for making the cut-outs I also arrange and bring the blank into engagement with the pasting mechanism, and means for removing the various circumferences at the proper points. In 45 cut-out portions of the inner plies from'the maa parallel pending joint application, Serial No. chines, with means for re-assembling the various 582,164, filed December 18, 1931, there is shown plies into a web before that is passed to the tuber. a compensator device by means of which the The combination of two sets of feed-rolls in this relation of the blank to the bottomers there ters Patent No. 1,942,019, dated Jan; 2, 1934. no at Strain p the Since the paper 15 way is of great advantage, as will be pointed out shown may be determined, and this is well adapt- 50 more fully. ed to adjust for registry in the tuber shown in In practice as a rule no difficulty in feeding this case, or to change this substantially perarises while the machine is running regularmanent adjustment while the machine is run- 1y; but if it is necessary to stop it and paste ning.

is being applied, the paper softens and warps In practice it has occurred that owing to vari- 55 ations in the moisture-content of the web or other reasons for its stretching or shrinking, a slight inaccuracy ofregistry may arise after the machine has been running; while this may be very small,

adjustable without stopping the machine so as to,

add or subtract an amount (usually very small) to the feed at each revolution of the machine, it being understood that a blank is formed and cut on at each revolution. Thus the accurate registry of printed matter on the web with the cut-ofl may be effected and may be changed indefinitely often by a correction made while the machine is running at full speed; the mechanism is capable of adjusting the registry to .001 of an inch, or even less, in either direction; and as its adjustment may be changed at will, it can compensate for variations in the web which are not capable of correction 'by any apparatus known to me.

The process described in this case may be carried out by assembling a number of plies into a web, and then separating them so as to get access to the inner plies on which the cut-outs are to be made. It is within my invention of course so to mount the various rolls of paper 1 that the inner plies are already separated from the outer ones and then to proceed with the manufacture. This is an obvious variation which I aim to cover and which does not require sepa rate illustration.

It is also undesirable to have the-scraps cut out of the inner plies allowed to remain in the machine, for obvious reasons. I have therefore devised a mechanism which will remove those portions from the machine entirely and may deposit them in a suitable receptacle. The particular device which I have illustrated is purely mechan- 109.1 in its nature and preferably engages these portions or pieces as soon as they are separated from the 'web, and may maintain mechanical engagement with them until-they are removed from the machine; this I consider the best method of operation, but I do not exclude other means for taking .out these pieces and preventing their accumulation.

I have not illustrated and described the particular type of bag which is to be made from-the blanks turned out by my improved tuber, because that is shown and described and the method of making it particularlypointed out in Letters Patent 1,942,019.

So far as I am advised the present case shows the only tuber which is capable of cutting ofi the'inner layers of the multi-wall bag while maintaining the outer layers at full length, all in a single tuber; This is of great value, and indeed seems to'be of controlling importance in commercial production of these bags.

Adjusting registry by a major substantially permanent adjustment, and automatically efiecting another correction at each revolution of the machine, as well as' the apparatus accomplishing this end, I believe to be new with me.

I have also devised a form of gearing for the knives of my improved tuber, which I believe to be new, and which speeds up the knife at the time of making cuts while preserving the timing of the entire revolutions so that the cuts are not, thrown out of registry by any cumulative error.

The accompanying drawings show an embodiment of the invention.

Fig. 1 is a diagrammatic plan of Fig. 2 and Fig. 2 a diagrammatic side elevation of a machine constructed according to the Figure 1.

Fig. 3 is an improved form of brake for the rolls constituting the source of supply.

Fig. 4 is a side elevation of the rolls of the feeding device interposed between rolls of paper and the operative parts of the tuber.

Fig. 5 is a sideelevation of the improved gearing to which I have referred. Fig. 5a shows the construction of the cutters on the roll b and Fig. 6 is a section on the line 6-6 of Fig. 5.

Fig.l1 is a conventional perspective of a form of paste-pad which I believe to be new.

Fig. 12 shows a'side elevation of the cut-ofl mechanism, and the compensator mechanism for making corrections of the point of cut-off at each revolution.

Fig. 13 is a plan of the parts shown in Fig. 12.

Fig. 14 is a side elevation of the feed rolls used in connection with the cut-off mechanism;

Fig. 15 is an end elevation of the parts shown in Figs. 12 and 13.

Fig. 16 is an enlarged sectional view of a part of the compensator mechanism.

Fig. 17 is a detail section on a smaller scale on the line l'I-l'l ,of Fig. 16 of the means for adjusting the stroke of the compensator.

Fig. 18 is a partial section of a compensator such asis claimed in my joint application, Serial Number 582,164, filed December 18, 1931. I

Figs. 19 and 20 are, respectively, a section on line l9-i9 of Figure 20, and an end elevation of the ratchet and pawl mechanism operated by the compensator.

Fig. 21 is a detail of the reversing mechanism for the compensator, adapting it to work in either direction.

I will first describe the device with reference to Figure 1, to give a general idea of the arrangement and'location of the different instrumentalities.

A. designates generally. a set of rolls of paper, in this case five being indicated. The rolls which are shown nearly exhausted are marked A The larger rolls which are mounted for convenient substitution when the rolls A are exhausted, are marked A. The feed mechanism to which I have referred interposed between the operating devices hereinafter described and these rolls bear general reference letter D; the operating devices which cut the slots in the inner plies and apply the paste to the web bear the general reference letter B. The device for making the thumb-cut commonly used in these machines is marked I. The longitudinal pasting mechanism is marked J. The tuber per se, by which I mean the devices for folding overthe web into the tube, is marked C. The compensator shown in my prior joint application, which fixes the relation of the cutter to the tube and determines the length of the blank, hereinafter called the substantially permanent adjustment, is marked H. The feed rolls between the cut-out mechanism and the cut-off which draw the web through the mechanism and tuber per se are marked E; and the cut-off arrangement and ejecting rolls by which the blanks are removed from the machine are marked F. This general arrangement is best understood from Figures 1 and 2. The arrangement of the mechanism for displacing the plies of the web, pasting them and reassembling them in connection with the feed rolls designed to provent the crushing out of the paste after the assembling is more fully described in Letters Patent to T. E. and A. C. Coty, Number 1,816,361, dated 'July 28th, 1931.

In Figure 3 there is shown a simple and effective brake designed to prevent the rolls of paper A? from overshooting by momentum if the machine is stopped for any reason, and to give the desired tension. This as will be seen from Figure 3, and also the plan, Figure 1, consists of a canvas strap A having at its end a weight A The strap is supported from an arm A pivoted at A When it is desired to change the rolls, as for example when one of them is nearly or quite exhausted, the new roll is placed in position adjacent to the exhausted one, and the arm is thrown over so that the weight A now presses the strap upon the surface of the fresh roll. The beginning of the, fresh roll is then pasted on the remnant of the web on the exhausted roll and the latter is cut ofi behind the joint, after which the machine may be started again.

In Figure 4 I show the method of obtaining the synchronized action of the two sets of rolls, D between the cutting mechanism andthe source of supply, and E on the other side of the cutting mechanism, and adjacent tothe cut-off device.

. It is manifest that if the-machine be stopped, the

pasting mechanism has already applied transverse stripes of paste to the plies constituting the web,

and these wet stripes continue to soften the paper until they begin to dry out. This part of the web is then easily stretched or distorted, and if the entire load be carried by the rolls E, drawing against the assembling mechanism at B and the I weight of the rolls in the source of supply, it may be considerably stretched or even torn in two. When the load is picked up, however, by the rolls D, these carry the burden of starting the rolls in the sourceof supply and as the paper is not moist the rolls are started easily, although they are of great weight. Any puckering of the web which may occur between the rolls D and E must,

therefore, be taken out in order to avoid waste.

Figure 4 shows theway in which this is done. The rolls D D constitute one set, D, D another. At registering points in the circumference of these rolls, notches d, d, are formed and when these register, the traction is taken up entirely by the rolls E as the web slips between the rolls D, and thus it is straightened out.

The general arrangement of the dispersingmechanism B is shown in our Letters Patent bottom of the figure; the third of the'intermediate or inner plies, passes also at the bottom of the figure and then is passed upward, a pasting mechanism 1) applying paste to its upper surface. The three inner plies are then assembled and the cutters b, b, presently to be described, cut the openings in these inner plies, which then pass toward the right side of the apparatus; as the upper and lower plies approach the inner plies, paste is applied to their inner surfaces by the mechanisms b, b, after'which all the plies pass the thumb-cut I, which-is well known and commonly employed and need not be described, and'acts on the lower ply, as shown in dotted lines in Figure 8. At this time the web passes through the longitudinal pasting mechanism J (see Figure 8) which applies paste to the overlapping folds w to w. The web is, then passed through the tuber C, of well-known construction, and folded over on the longitudinal dotted lines shown on Figure 8 into the form shown in dotted lines in the section, Figure 9; after which it passes through the rolls E which are so arranged as not to press upon the pasted seams, as described in our patent already referred to, then passes to the cut-off F and the blanks are cut off and ejected from the machine by the rolls 1. f.

It is to be understood that in accordance with common practice the rolls referred to,,often also called cylinders", are composed of disks mounted :upon a common shaft, and displaced laterally.

The rolls E (see Figure 14) are six in number and each set is providedwith a cam arrangement so that the rolls of each set are separated as they paste streaks approach, it being so arranged that two of the sets of rolls as shown are always in operation, the rolls lifting as 'the paste streaks pass through. This arrangement is claimed in Letters Patent to Coty and Coty above named.

The lateral spacing of the disks on the shafts also permits the longitudinal streak to pass through without undue pressure, the pull upon the web being usually sufficient to insure adhesion, as the paste dries quickly.

Figure 5 is to be read in connection with Figure 5a, Figure 8 and Figure 10. Figure 8 shows the cuts W which are made in the inner plies of the web. Figure 5 shows the means for making these cuts and the gearing for operating it., It will be observed that the web W passes between the rolls b b".v The cutters which make the narrow sides of-the rectangular cuts are carried by the rolls b and are marked D The longer sides of the cuts a re'made by the cutters I), carried by the roll b understood from Figure 10. It will be understood that they work in the notches shown on the roll I), and a similar provision is made for the cutters b with respect to the roll b". It will be seen that the action of the knives makes the cuts W in the inner piles of the web. That leaves pieces of these inner plies, of the shape of the cuts, and

The construction of these cutters is best it is desirable that these be removed from the web to prevent irregularities, and their accumulation in the machine. This is effected by the device shown in Figure'lO, consisting of a blade I),

which is operated by a cam roller b drawn sired position the blade, b may be released by the T cam D and the cut-out portions may be deposited in ,any suitable receptacle (not shown).

In the right-hand portion of Figure 5 is shown the means for operating the thumb-knife and the gluing devices. The latter are indicated at b b and as they are old and well-known it is not necessary to describe them fully. The thumbknife for making the thumb-cut in the outside sheets of the web, indicated in dotted lines in Figure 8 is marked b The gearing for the two sets of knives illustrated is substantially similar in design. These gears are all eccentric and may be elliptical or off-center, at the designer's option. The construction may be best understoodjrom Figure 6. The centre shaft in that figure is the drive shaft. On the drive-shaft is a hub b and similar hubs are secured to the other two shafts, and are marked b' and b Loosely mounted to rotate on these hubs are the gears 12 on the left shaft,

17 on the right shaft, while on the central shaft are the two gears b b All of these gears are I capable of being independently set or rotated relatively to one another in order to arrange the timing of the cutters as may be desired. It will be seen that by moving the gears b, b, relative to one another, the gear I) will be rotated by the gear I), and b" by the gear b, after which they may be clamped in position. .This is effected by the plates b which are keyed to the respective shafts and are secured to the hubs b", etc., by

bolts. When the gears have been adjusted to the correct position, that is, when the rolls carrying the knives have been brought to register with each other (as shown in the left-hand part of Figure 5), or when the thumb-knife b is brought to register with the cut-away portion of the web in the right-hand part in that figure (as indicated in dotted lines in Figure 8), the plates may then be clamped and these will I clamp the several gears in their adjusted positions. It will be seen that the plates serve as indexes, a scale 12 being formed upon each plate and a fiducial point b being indicated on the side of the gear, so that any desired setting may be reproduced, according to the length of the bag blank l0 being formed in the tuber. This greatly facilitates the setting of the machine for any desired length of blank.

It will be observed that the arrangement of gearing as indicated, owing to the displacement of centers, rotates the cutters at an increased speed at the time when they register with the slots in the opposing roll and the speed is after-' wards retarded so that the revolution is performed at a gradually increasing speed up to the time that the cuts are made and at a diminishing speed from then until the knives and slots are at opposite sides of their revolutions. This facilitates the cutting of the paper.

Figure 8 has been sufliciently described in connection with the other figures; but it will be seen from Figure 9in connection with Figure 8 that when the tube is formed from the web, the latter takes the position shown in dotted lines in Figure 9, and the plies at the top of Figure 8 are first folded over and then those at the bottom are folded over upon them, glue having been applied between them so that the closed tube is shown as, in Figure 9, as already indicated.

In connection with the gluing devices shown somewhat diagrammatically in Figure 5, I employ an improved shoe for applying the glue, which is shown in Figure 11. A hub 12 is mounted onthe shaft b. A projecting flange b sustains a bar b having a cutaway portion in which the shoe b rests, the latter being secured in place by screws and a strip b. It will be observed that the upper part of the shoe D is notched so as to provide channels I) in which the paste may run and that these channels, owing to the angle at which they are cut in the face of the shoe, overlap one another, thus making sure that paste is applied over the entire width of the web.

Figures 12 and 13, 15 to 17, 19 and 20, are to be read together. They disclose compensating means, which may operate at every revolution to make any correction necessary to bring the bag blank into proper registry with the knives of the tuber. As already stated, very often there is printed matter upon the web and under these conditions, while the registry of the web with the knives may be entirely correct at the beginning of the operation the web itself may be stretched or shrunken at different parts of its length.

Under these conditions it is not desirable to alter the setting or registration of the web with the knives by changing the length of the blank except to the extent necessary to bring the blank into registry at each revolution. It is for this purpose that I have devised the compensating device for making those minor corrections. In these figures, G, represents in general this particular form of compensator (see particularly Figures 12, 13, and 15). The device G" (Figures 15, 19, and 20) is a ratchet and pawl mechanism presently to be described more fully, which is reciprocated by the link G the link itself being operated by an eccentric device G shown on the right, which is rotated by the sprocket chain G Asathe ratchet and pawl device G" is reciprocated, it turns a shaft G on which is a worm G thus rotating slightly the gear F The compensator H shown in Figure 13 and presently to be described in connection with Figure 18, effects the movement of the shaft upon which the wormwheel is located with reference to the gear F Power is communicated to the device by the belt K,,but in practice of course any proper form of motor may be used. The shaft Ci (see Figure 15) by which the link G is operated, may be'approached more or less to the center of the shaft G, as will be described in connection with Figures 16 and 17, thus altering the stroke of the link to any desired extent. The rolls indicated at the top of Figure 15 are the rolls carrying the cut-off knives F It is obvious that if the relation of the shafts is fixed by the gear wheels, the worm Gr could not be operated without damage to the machine, and it is for that reason that I have introduced here the compensator shown in the joint patent application, Serial Number 582,164, already rereferred to, and which is illustrated in Figure 18. It will be observed that this same form of connecting device is used in several places in this machine, and as they are all substantially alike,

one description will answer for all of them. In

. these hubs abutting against one another and be-.-

ing carried in a casing H". Each of these hubs is geared on its periphery. The hub H is keyed to shaft H and meshes with gears H H the sets of gears H and H being each upon a common shaft, which is carried by the casing H". The hub H meshes with the gears H 'H which are respecpensators tively upon the same shafts as the gears H H As the shaft H turns therefore it also turns the shaft H at the desired speed ratio with shaft H; but if the casing H be rotated the angular relation of the shaft H and shaft H will be altered as the hubs carrying the respective sets of gears H H are rotated about the axis of shafts H -H The casing H is stationary when adjusted,

in Figure 18. I use the letter H as generic to this device as it occurs more than once in the machine.

The construction of the part of the compensator by means of which the adjustment of stroke is perfected, is best understood in connection with Figures 15, 16, and 17.

Referring particularly to Figure 16, there is a shaft G upon which the hub G is keyed. This hub is rotated by the sprocket wheel G driven by the chain G Figure 1 5. It contains an eccentric opening seen in end-elevation in Figure 17,, which is filled by a plate G having a projecting flange G, as shown.

The central shaft G and the stud shaft G which operates the link (i are shown in dotted lines. It will be seen that the ring G has internal gear-teeth operated by the gear G on the shaft G The whole device operates on the shaft G as a center. The worm G is mounted on shaft G9 and the'nut for operating it'is contained in the collar G which is operated by the fork G (see Figure 13). G is a counterweight for balancing the worm G, for which it also acts as an outer bearing.

The device operates as follows: When the handle G (see Figures 12 and 13) is moved, the fork G which is keyedto shaft G swings the collar G backward or forward on the worm G thus rotating the shaft G and the hub and gear G adjusting the distance of G from C? as a center. This rotates the internally geared ring G as will be seen from Figures 16 and. 17. The effect of this is to bring the shaft G closer to or further from the center of the shaft G about 60 shafts H H shown in Figure 18. If then the shaft G of Figure 16 is in alinement with the shaft G there will be no reciprocatory motion of the link G while if the handle G be moved, (see Figures 12 and 13), the shaft G will be displaced slightly-from the center, and the link G will be reciprocated more or less by the action of the eccentric in the hub G thus turningthe shaft G slightly at each revolution of the device G Turning now to Figure 1 in conjunction with Figures 12 and 13, it will be seen that there are two of the devices H which I have called com- One of these controls the angular relation of two shafts, only one ofv them shown in 'Figure 13, and is there marked H it being understood that in accordance with the. construction outlined in Figure 18, there are two shafts,

H H the angular relation of which is controlled by the device H shown at the bottom of Figure 13. These devices with which the auxiliary compensator G co-operates to rotate the casing affect by small increments the position of the feed with reference to the cut-off F shown in Figure 12 and in end elevation in Figure 15.

As already indicated, the belt K rotates the shaft K and the gear K which rotates the shafts of the compensating device by means of the change-gears K K These require no extended description because they are old and conmion, but they determine the rotation of the shafts H H of the compensator device H. In Figure 13, the cut-off device has been removed for clearness of illustration. The shaft K Figure 13, also rotates the bevel gears G3, G which rotate the shaft H and thus also the shaft H of the compensating device H The power transmitted to the shaft H of the compensator H shown in the bottom of Figure 13 through the change-gears drives that shaft and also drives a pair of beveled gears d which rotate the shaft (1 i Turning now to Figures 1 and 2 it will be seen that the shaft d operates the feed rolls D, by means of the gears D (the upper part of Figure 1), while the shaft H drives the thumbknife by means of the gears on the left in Figure 1; the slotting knives b b, for cutting out the bottom of the interior plies of the bag; and the various gluing devices shown under the general reference B in Figure 2, as well as the thumbv knife I, and the longitudinal pasting device J of Figure 2.

Thus it will be seen that the compensator H controls all of the devices between the rolls of paper and the tuber, while the compensator H' controls the feed rolls E; and all of these devices are capable of exact regulation with relation to.

the position of the casing of the compensator H has been changed until the cut-off knives register correctly with the proper place on the web, the handle G may be brought -to neutral position and the auxiliary compensator G will thus be thrown out of action until some further adjustment becomes necessary by change of conditions in the machine, as by drying out of the paper, which may throw the web out of desired registry.

Turning now to Figures 19 to 21, I show the form of clutch device which operates the shaft G to turn the worm' G and adjust minutely the axial relations of the shafts H H, of Figure 18, without disturbing the main adjustment, the purpose of the action resembling somewhat the coarse and fine adjustment of alinement of a transit glass, for instance. The device is easiest understood from Figure 20, although it is assisted by the construction as shown in Figure 19; and Figure 21 .shows separately the reversing mechanism for the clutch. The hub G is secured to the shaft G which operates the worm Ci? of Figure 12, and this hub has a plate G" ,carrying the'pawls G", of which there may be a greater or less number. I have shown eight, for the purpose of making the action uniform around the circumference. An arm Ci is centered on the shaft G and the link G reciprocates this arm to a greater or less extend according to the adjusted relation between the stud G and the shaft G of Figures 16 and 1'7. On the inside of G there are ratchet teeth with which the pawls G co-operate as seen in Figure 20. To prevent the hub rotating backwards under the pull of the pawls dueto the friction caused by their springs, I provide a brake G which presses down on the rim of the hub sulficiently for that purpose, and is provided with an adjustment so that the pressure of the spring may be just suflicient without causing undue friction. It will be seen that the motion of the plate G and pawls G is always in the same direction, and is communicated to the shaft G by means of a gear G which in the case illustrated, meshes with the gear G", which in turn turns the gear G, the latter being on the shaft G In order to' efiect the rotation in the other direction of the shaft G I provide an arm G which carries the two gears G and G which are in mesh. The

arm is centered on the shaftG on which the gear G is also centered. As illustrated in Figures 20 and 21, with the arm 2| in the upper position as there shown, resting against the stop G and held in position by a stud G preferably spring-operated, the rotation of the wheel G is as indicated by the arrow. When the stud G is removed to the hole G the arm G is brought to neutral position, so that neither G nor G meshes with G; when the stud is inserted in the hole G and brought up against the lower stop G then the gear (3 meshes with G, and as is obvious the latter gearwill run in the reverse direction.

It will be understood that the whole structure shown in Figure 16 rotates as a unit, the worm G rotating around the shaft Gd, counterbalanced by weight G The method of operation will be obvious from the foregoing description: but I may point out that as the collar G is moved along the worm G by the handle G it turns the-shaft G relative to G thus rotating the ring G and bringing the stud shaft G closer to or removing it from the center around which the shaft G revolves.

I have described the operation of the compensating. device G- as making an incremental adjustment at every revolution-for simplicity of explanation; but as will be apparent from examination of Figure 15, this is true when referring to the revolutions of the shaft G That shaft may have its ratio to the revolutions of shaft K the main drive, determined by the ratio between the sprocket upon the shaft H and the sprocket G on the shaft G at anything desired, with reasonable limits. As here shown (in Figure 15) G is rotated about once for every three rotations of K but it may be rotated three times .or more as often, or less thanhere shown, giving a precision and flexibility of adjustment which I believe to be heretofore unknown.

I may employmore than one set of the auxiliary feed-rolls bearing the general reference letter D in the location indicated or otherwise,

wall bags, 'means for supplying a plurality of plies; means for separating the inner plies from the outer ones; means for cutting out portions of the inner plies; and means for assembling the plies into a web.

2. In a machine for forming a tube for multiwall bags, meansfor supplying a plurality of plies; means for separating the inner plies from the outer ones; means for cutting out desired portions of the inner plies; means for applying paste to one or more of the several plies to secure them-together; and means for re-assembling the plies.

3. In a machine for forming a tube for multiwall bags, means for supplying a pluralityof plies; means for separating the inner plies from theouter ones; means for cutting out portions of the inner plies; means for re-assembling the plies; and means for forming a tube therefrom. 4. In 'a machine for forming a tube for multi- Wall bags, means for supplying a plurality of plies; means for separating the inner plies from the outer ones; means for cutting out portions of the inner plies; means for applying paste to one or more of the several plies to secure them together; means for re-assembling the plies; and ineansfor forming a tube therefrom.

5. In a machine for forming a tube for multiwall bags, means for supplying a plurality of plies; means for separating the inner plies from the outer ones; means for cutting out portions of the inner plies; means for removing the cutout pieces; and means for re-assembling the plies.

6. In a machine for forming a tube for multiwall bags, means for supplying a plurality of cut-out pieces from the machine; means for reassembling the plies; and means for forming a tube therefrom.

7. In a tuber for paper bags, a source of supply; means for assembling the plies of paper from the source of supply into a web; means for operating upon the web; feed-rolls for drawing the web through the operating means; auxiliary feed-rolls between the source of supply and the operating means; and means for releasing the grip of the auxiliary rolls at desired times.

8. In a-tuber, a source of supply; means for assembling plies of paper from the source into a web; operating apparatus for working on the web; feed-rolls on the apparatus; additional feed rolls between thesupply source and the apparatus; and means for permitting lost-motion between one of the sets of rolls and the web so as to synchronize the action on the web of the two sets of feed-rolls.

9. In a tuber, a source of supply; means for' assembling plies of paper from the source into a web; operating apparatus for working on the web; feed-rolls in advance of the apparatus;

additional feed-rolls between the supply source and the apparatus; and means for synchronizing the action on the web of the two sets of feed-rolls, such means interrupting the traction of the rear set of rolls sufiiciently to permit the advance rolls to take up any slack between the two sets.

10. In a tuber, a source of supply; an apparatus for acting upon the web furnished by the source of supply; feed-rolls in advance of such apparatus; and additional feed-rolls located be- .assembling a number of superposed plies into a ,web;.separating the outer plies from the inner ones; cutting out portions of the inner plies; and then re-assembling the plies.

12. The process described of forming a tube for making multi-wall bags, which consists in assembling a number of superposed plies into a web; separating the outer piles from the inner ones; cutting out portions of the inner plies; and

then re-assembling the plies; pasting them together and folding them into a tube.

13. The process described of forming blanks for making multi-wall bags, which consists in assembling a number of superposed plies into a web; separating the outer plies from the inner ones; cutting out portions of the inner. plies; re-assembling the plies; pasting them together; folding them into a tube; and cutting ofi blanks from the tube.

14. The process described of forming a tube for making multi-wall bags, which consists in assembling a number of superposed plies into a web; separating the outer plies from the inner ones; cutting out desired portions of the inner plies while they are separated from the outer ones; re-assembling the plies and forming a tube therefrom.

15. The process described of forming a tube for making multi-wall bags, which consists in assembling a number of superposed plies into a web; separating the outer plies from the inner ones; cutting out desired portions of the inner plies while they are separated from the outer ones; pasting the plies during the re-assembling and forming a tube therefrom.

16. The process described of forming a tube for making multi-wall bags, which consists in assembling a number of superposed plies into a web; separating the outer piles from the inner ones; cutting out desired portions of the inner plies while they are'separated from the outer ones; re-assembling the plies; pasting the plies during re-assembling; forming a tube therefrom, and cutting off blanks from the tube at the cutout portions of the inner plies.

17. The process described of forming a tube for multi-wall bags, which consists of segregating the inner plies from the outer ones; cutting out desired portions of the inner plies; then assembling the inner and outer plies into a web and forming a tube therefrom.

18. In a tuber for multi-wall bags, means for segregating the inner plies of paper from the outer ones; means for cutting out desired portions of the inner plies; means for assembling all of the plies into a web; and means for forming a tube from the web.

19. The method of forming a blank for a cutout bottom multi-wall bag, which consists of segregating the inner plies of the web from which the blanks are formed from the outer plies; cutting away portions of the inner plies at the parts from which the bottom is to be formed; assembling the plies into a web and securing them together; forming the web into a tube; and cutting off the blank from the tube at the position of the cut-away portions of the inner plies.

"-20. Means for preparing a blank for a cutout bottom multi-wall bag, comprising means for segregating the inner plies from the outer ones; means for cutting away portions of the inner plies at the parts thereof from which the bottom is to be formed; means for assembling all of the plies into a web; means for forming a tube from the web; and means for cutting off a blank from the tube at the position of the cutaway parts of the inner plies; the said several means all operating automatically and successively upon each blank.

21. In a tuber for paper bags, a source of suprolls upon the web at desired times, so as to permit the other feed rolls to take up any slack in the web between the two cooperating sets of feedrolls. a V

. THOMAS EARL COTY.

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