US2581801A

US2581801A - Multiply bag tubing machine

Info

Publication number: US2581801A
Application number: US33768A
Authority: US
Inventors: Lienart Marcel
Original assignee: ST Regis Paper Co
Current assignee: ST Regis Paper Co
Priority date: 1948-06-18
Filing date: 1948-06-18
Publication date: 1952-01-08
Anticipated expiration: 1969-01-08
Also published as: IT454444A

Description

Jams, 1952 M `;INART 2,581,801

MULTIPLY BAG TUBING MACHINE Filed June 18, 1948 v 14-SheetsSheet l few a INVENTOR MARCEL LugNAm'-,

A-r-roucvs. l

M. LIENART MULTFL-YA BAG TUBING MACHINE Jan. 8, 1952 Filed June i8, 1948 14 Sheets-Sheet 2 ATTORNEYS'.

Jan. 8, 1952 M. LIENART MULTIPLI BAG TUBING MACHINE Filed June 18, 1948 v1.4 Sheets-Sheet 3 Jan. 8, 1952 M. LIENART MULTIPLY BAG TUBING MACHINE 14 sheets-sheet 4 Filed June 18, 1948 smv . INVENTOZ MARCEL LI aNAIZT. m M wha( ATTORNEYS on BY LD T v Jan. 8, 1952 M.`L1ENART MULTlPLYL BAG TUBING MACHINE 14 Sheets-Sheet 5 Filed Jupe 18, 1948 Ellmlmlmllmlgl@ ...Een

INVENTOR. MARCEL LlezNAsZ-r.

Jan. 8, 1952 M. LIENART 2,581,801

' MULTIPLY BAG TUBING MACHINE 14 sheets-sheet e ATTUKNEYJ..

Filed June 18, 1948 Jan. 8, 1952 M. LIENART MULTIPLY BAG TUBING MACHINE 14 Smets-sheet 7 Filed June 18, 1948 NVENTOR.

MARQEL. LIEN/M21'. ABY

fum/ld, Cwjj A oRNEYs Jan. 1952 M, LIENART 2,581,801

A yMULTIPLX BAG TUBING MACHINE Fi-led June 18, 1948 14 sheets-sheet 8 ATT NEYS Jan. 8, 1952 t M. LIENA'RT MULTIPLY BAG TUBING MCHINE Filed June 18, 1948 14 Sheets-Sheet 9 INVENTOR. lIVI," Roel.. Lne-.NAvz-r.

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`Ian. 8, 1952 "M. LIENART` MULTIPLY BAG TUBING MACHINE Filed June 18, 1948 14 Sheets-Sheet l0 INVENTOR. MARclLLIENAE-r.' 4wd, W9C@ ATT IFA/Elfi Jan. 8, 1952 M. LIENART MULTIPLY BAG TUBING MACHINE 14 Sheets-Sheet 1l MARCEL ENART. MMM@ Filed June 18, 1948 Jan. 8, 1952 M. LIENART MULTIPLY BAG 'TUBlNQ MACHINE 14 Sheets-Sheet l2 Filed June 18, 1948 INVENTOR.v MARcrL. I HSNART MM *W ATTOKNEKS.

Jan. 8, 1952 M. LIENAR-r MULTIPLY BAG TUBING MACHINE 14 Smets-sheet 1s Filed June 18, 1948 www mom

INVENTOR. MARCEL LsENAra-r l AT /VEYS Jan. 8, 1952 M. LIENART 2,581,301

MULTIPLY BAG TUBING MACHINE FiledvJune 18, 194s 14 sheets-sheet 14 INVENTOR.` Mmzcal.. L nsNAsz-r.

ATTO NEKS.

Patented Jan. 8, 1952 MULTIPLY BAG TUB-ING MACHINE Marcel Lienart, Brussels, Belgium, assignor to St.

Regis Paper Company, vNew York. N. Y., a corporation of New York Application June 18, 1948, Serial No. 33,768 I This invention pertains to improvements in bag tubing machines for making multiwall paper tubes, in bag lengths, for the production of multiwall paper bags therefrom. The invention pertains to machines of this type especially adapted for making multiwall tubes for so-,called stepped-end bags, to be subsequently formed into the nished bags on a bottoming machine.

','The invention will be described with reference to a machine so constructed and adjusted as to manufacture a stepped-end bag tube similar to that disclosed in the United States Patent to Hoppe No. 2,055,030, granted September 22, 1936, but having as many as five plies, three of which have their end portions formed to present the relatively` stepped-end relationship as shown in thatpatent, the remaining two plies respectively (one or both of which may be omitted if a four or three ply bag is desired) being of a coniigura-` tion such as to duplicate two of the others and with' their end edges coterminous therewith. In other words the bag end edges will have three steps formed of three of the plies, two of which are duplicated by the remaining two plies so thattwo of the plies do not vpresent individual stepped ends. It will be understood, however, that the machine here disclosed may be set up and adjusted for making other forms of steppedend bags, and in fact the machine is also adapted for making multiwall bag tubes of various types which do not have stepped ends.

IIhe 'problem of constructing an automatic machine for forming multiwall stepped-end bag tubes presents a number of complications and difficulties. Since there are several web endsto be sep-arated along lines which are not coterminous, the usual practice for non-stepped-end bag tubes canno-t be followedof cutting off the iformed multiply tube at bag length intervals by a simple rotating cutting knife. Instead it has been heretofore proposed iirst to perforatethe webs individually across their width, then superpose the several webs with'the periorations in stepped relationship, then to form the webs into a tube', vand nally to pull the tube apart into bag lengths at the stepped lines of perforation. While this procedure may be followed with relatively slow-operating tubing machines, it involves several diiiiculties. For example, for relatively large bags, particularlyvif made at high 14 claims. (c1. 93-63) speed, the webs will tend to tear apart at the lines of perforation as they are being pulled through the tuber, or else the perforations must be so slight that ultimate separation of the bag lengths is diiiicult Without tearing. Also, in order to provide side and end flaps of proper relative lengths and relationship in the finished stepped-end bag, it is desirable toprovide slits separating the side and end flaps of each web, and it has heretofore been proposed to accomplish this slitting as an initial step performed concurrently with the forming of the perforations. Yet this involves a multiplicity of separate sltters for a multi-'ply bag, all of which must' be separately adjusted or replaced every time the machine is readjusted to make a, bag tube of different dimensions. Furthermore, such individual slitting Aof the Webs involves the diiiiculties of maintaining accurate and proper register of the slits in the numerous webs after being superposed;

or else the flaps of the bag botto-m when finishedV will not fit properly orbe capable of being glued and sealed properly.

With the stepped-end construction of thev above-mentioned Hoppe patent, the webs in separated condition may at rst be individually perforated part way across the web only, viz. at the parts which are to form the middlesteppedend Y portions of the tube, whereas the portions which are Yto form the sides of the tube (that is. theve'nd flap portions at the bottom of the iinished bag)` may be left unperforated and not cutl until after the tube is formed in the tuber, .thus leaving the webs in strong condition, capable of being pulled rapidly through the machine without danger of separation at the perforations, even though the per-forations may have been so effectivelymade as to weaken or sever the greater part of lthe vi'ibre along the middle portion of the endfedge of the bag. Then, just before the tubeit is only necessary to pull the tube lengths apart along relatively weak lines of perforation across the middleportion of the bag ends. But despite the general advantages of making stepped-end bags according to the above-mentioned Hoppe patent, the construction oi a commercially practical machine lor automatically carrying out this method involves additional serious diliculties,

` particularly since the perforating must be done before the tubing operation, and the slitting and final cutting at the edges of the tube must'be done at a widely spaced position after the webs are assembled and formed into a tube, yet along lines which are maintained inaccurate register with the positions of the perforations in the several plies. And if, as is ordinarily necessary for practical purposes, the machine must be 'adapted a for making bags of various dimensions, Ythe necessary adjustments for so doing while still main--- taining accurate register and positioning o'f,A tlieV lines of gluing, perforation, slitting and cutting and the proper timing of the various moving satisfactorily solved, but which are overcome by the present invention even to a degree whereby stepped-end tubes may ybe accurately formed more rapidly than multiwall bag tubes of other types have heretofore been made and with little lfoss of time'for readjustments of the machine to diieren't bag tube dimensions.

accordance with the invention,'the machine is so' constructed that various registry adjustments4 for the necessary perforating, slittingand cutting operations on'the paper webs, and for the degree or extent of stepping or overlapping 1' ofthe successive plies at the bag ends, can be made from a single control position, and while the machine'is either stationary or running, by s iinple manipulation 'of hand wheels or clutch controls. Also, registry adjustmentscan be made,

. inf similar fashion, as between the regions-'of per;

for'ating', cutting, slitting and gluing', on the one hand, andany printed matter impressed on the outer paper web for appropriately centering the latter on the nished bags.

" parts, presents problems which'others Vhave not Y lathe bag tuber machine of the invention, the

various paper webs "forming the bag plies are fed from rolls thereof, eitherV singly or in superimposed pairs, through perforator and glue aD- 1 plicatorunits individualfto such single webs or superimposed web pairs, 'wherein said webs or pairs are transversely perforated and certain of them printed with transverse glue patterns ier subsequently gluing the successive webs together. The webs are fed from these periorator; and gluing units in spaced-apart relation `overrua l series of guide rolls individual thereto, and then v passing Vover the adjustable assembly rolls, the

webseite superimposed inthe laterally stepped relation aforesaid, and are fed thence past a gulue-applieator unit which n applies longitudinally attending, glue lines alone the laterally stepped edges, but the glue lines being interrupted at each perforated line. rlhe webs are fed thence through a tube-forming unit which forms the webs into a continuous tube, each ply of which is glued to itself along the longitudinal seams formed by the stepped, lateral edges. From this point the continuous multiwall tube may pass through a slitter which appropriately slits the tube longitudinally at bag lengths adjacent the opposite edges thereof, and in the regions of the transverse perforations therein, the tube passing thence through a cutter which cuts the tube into bag lengths adjacent its lateral edges, and separates the successive plies thereof; along thelines of perforations therein, thereby to produce multi- Ywall tubes of bag length, the successive plies of which are glued to each other by the transverse glue lines, -the-said tubes having ends appropriately stepped and slit for subsequent forming into of Fig. f1; while Fig. v1b is a AcQntinll,@tion o f la `astaken along the linee-b or Fig. la.

'ligl 2 is a plan view of the portion 0..f Figs. `1 and le located between the lines c-c and thereoi; while Fig. 2a is a plan view of thefportion. of Figs. 1a and 1b, located between the lines d--d and e.-.e thereof.

, Fig. 3` is an enlarged vertical cross 'section .of one -Qf the perforator and glue ,applicator units.. as `taken, at 3-.-.3 of Fig. 2, this assembly per-v forating the paper plies transversely at bag lengths and applying transverse glue lines to certain'of the plies. Fig. 4 isa vertical section taken at Vline .li-4 Aof Fig. 3, illustrating the vglue applicator construction and :.jlrive;l while Fig. isa vertical section taken at 5.-.5 of Fig. showing certain pull rolls and drive therefor, Fia 6 is a horizontal sectional detail., as taken at. 676 of Fig. 4,'showing more-of the drive. '7 is a vertical section of the. Perforator as taken atl- 1 of Fig. 3. Fig. 8 is an end view i the drive gear and dial'for 'angularly 'adjusting'tlie perforating roll assembly.. Fig. 9 is a vertical section, 'taken at 9,-9 Vof, Fig. 3shoWIlg more Qif the drive; while Fig. 10,'is a section as takenjat ille-.1.11` 0..f Fig. 3, showing more of the glue jane nlicator .nwelfwirlilsrr 1,` "Fig, 1l is an enlarged sectional. View .of the middle portion of the perfrator drum assembly as 'illustrated in transverse secticnjin Fig.. andr in elevation in Fig. 1;` while `Figglld'isla sectional view taken along line Ila-l la ofFig. 11; Fig. 12 is an enlarged elevational view ci .pertons o f'the rotatable perforator knife con: struction and Darts for supporting and adjusting same, Fig. 12d'being a sectional view taken along line Iza-Iza of Fig. 12, and Fig. 13 .being-taken approximately at |3.-,I3 of Fig.. 12. l 4fFig. 11i is an enlarged end, elevation .of that @QH/ion Vof Figs. .lolv and 2 which is located be. tweenthe lines f-f and demand-comprising web assembly rolls andglue applicator assembly fer-superimposing ther paper `plies and lgluing longitudinal ledges thereof. Fig. 15 is van veng lagged vertical section as--talen at |5-..l5 of la, illustrating the 'glue` applicator mechanismtof; Fig. le; while Fig. .16 is a sectional elevationofthe guidev roll assembly astaken at IBIB lQi; Fie-51% .Fie- '17 is .an enla-reed end elevation 45v detail of Fig. 14. Fig. 18 is an enlarged crosssectional detail taken at I8-I8 of Fig. 16. Figs. 19, 20 and 21 are fragmentary views in elevation of a shaft-actuated clutch mechanism employed in the Fig-,14 assembly for selectively adjusting the spacings between the rolls of Fig. 14. Fig. 22 is Ian enlarged cross section of the glue applicator as taken at 22-22.of Fig. 15; while Fig. 23 is a cross section of the glue applicator as taken at 23--23 of Fig. 22.

Fig. 24 is a longitudinal sectional elevation of the main pull roll, slitter and bag length cutoff mechanism as taken at 24-24 of Fig. 2a (some details being omitted for clearness) while Fig. 25 is a plan view of Fig. 24, with parts omitted toillustrate the operation of this portion of the apparatus. Fig. 25a is an enlarged detail view taken at 25a-.25a of Fig. 25 and showing certain parts of one of the slitting devices.

Figs. 26,- and 27 comprise a diagrammatic A showing, mostly in plan view, of the overall drive for the complete machine, the latter as illustrated in Figs. 1 to 1b inclusive, Fig. 27 being a continuation of Fig. 26 as taken along the line g-g thereof.

Figs. 28 to 31 inclusive, are plan views of the progressive stages in the development of the multiwall bag tube as produced on the machine of Figs. l to 27 inclusive; while Fig. 32 is a plan view illustrating the first -step in the bottoming operation for forming the finished bag, as carried out on a bottoming machine, the latter not shown or included as part of the present invention.

Referring to Figs. l to 2a inclusive, and considering first the overall operation, as -above stated the tuber machine is illustrated as set up to make a live-ply bag tube, the various paper plies I to I4 inclusive of which are fed respectively from paper rolls I to I9 inclusive, individually mounted on roll stands as .at 20, 2|, each of whichincludes conventional facilities as indicated for shifting a new roll of paper into place as the paper becomes all used from the .previous roll. For maintaining appropriate back tension on the paper webs, a belt 22 of canvas or the like, having one end secured to a crosswalk 23 is looped over the roll and terminates at a weight 24. Each web, such as I4, in passing oif the paper roll, such as I9, is fed under a guide roll as at 25, and thence over a resiliently mounted guide roll as at 26, from whence it is fed under the guide roll for the next web, as at 21, whereby the two webs are superimposed, this procedure continuing for the successive webs until all iive'webs are superimposed in passing under the final guide roll 28, the rolls of paper being so positioned in vthe roll stands that the webs are fed in transversely stepped relation, as at 29, Fig. 2, at which point the uppermost web I0 is separated from the rest, passing over guide roll 29', the remaining webs I I-I4 inclusive passing under this roll. From this point, the upper web III passes under a guide roll 30 in a perforating and glue-printing unit, shown generally at A, and thence respectively over and under a pair of driven pull rolls 3I; While the next lower web Il passes under a guide roll 32 of unit A and thence respectively over and under a pair of driven pull rolls 33, from whence webs I0 and II are guided under and over appropriately disposed guide rolls into superimposed relation at 34.

The purpose of bringing the webs I0 and II together at 34 is in order concurrently and identically to perforate them at bag length intervals inra perforator 35. in the manner illustrated at 36 and 31 in Fig. 28, wherein the distance 33` represents one bag length, the upper web I0 ,be-n

ing torn away to show the perforations 31 inthe next lower web II corresponding to theperforations 36 in the upper web I0. After passing through the perforator 35, the websare ,again separated by means of the guide rolls 36', web

l0 passing downwardly and thence upwardly unl der appropriatelyldisposed guide rolls, as at 31',

while web II passes upwardly over guide rolls.

as at 38', and thence through a glue-printing de-v vice 39. In passing through the device 39,` the web I I has printed on its surface which is to face,l web I0, a glue pattern such for example as shown, f

at 40 in Fig. 28, and for purposes described hereinafter. f

In similar fashion the intermediate webs |2` and I3 are fed into the next adjacent perforating and glue-printing unit, shown generally at B,

the upper web I2 passing therein under a guide.` roll 4I, thence through a pull roll stand 42; whilethe lower web I3 passes similarly under a guide roll 43 and through a pull roll stand 44, .the

webs passing thence under and over appropri-v ate guide rollsinto superimposed relation at 45, where they are concurrently and similarly per--` forated by a perforator 46, to perforate the sameA as shown at 41 and 48 of Fig. 28, for websI2 and- I3, respectively. In passing out of the ,perforator 46 the webs are separated by means of guide rolls 49, web I2 passing thence downwardly pasta glue applicator 50, for printing a glue pattern on its normally upper surface as shown at 5I of Fig.

28, the web passing thence upwardly over a guide roll 52; .while web I3 passes upwardly over guide rolls as at 53. and past a glue applicator 54, for printing on its normally upper surface a glue pate tern as shown at 55, Fig. 28, the web passing thence up over a guide roll 56.

In similar fashion, the lowermost web I4 is i fed into the final perforating and gluing unit,

shown generally at C, wherein it is fed under a guide roll 51 and over various other guide rolls, as at 58, thence through a pull roll stand 59 and over appropriate guide rolls through a perforator.

60, wherein it is perforated as shown at 6I, Fig.

28, the web passing thence past a glue applicator 62, wherein a glue pattern is printed thereon as shown at 63, Fig. 28, the web passing thence out over guide rolls, as at 64.

If desired the lower surface of the lower web I4 may carry printed matter such as trade names or descriptive matter which is to appear on the outside of each bag tube. Such printing may be done on a roll of the paper before -it is mountedon the stand I9, or if -desired the paper from stand I9 may be run through a printing press Von its way to the tubing machine here disclosed.`

In either event it is of course necessary that the printing on each bag tube be at a predetermined location with respect to the lines of perforation.

and the rollers at 58 provide a ready means for suitably adjusting the longitudinal position of the printed matter on web I4 with respect to'l the perforating, which is done at the perforator indicated purposes. However, the adjustable roll means at 58, although a convenience in first `setf i ting up the machine to a given bag length,vis not essential, since a further means in the form of a compensator (hereinafter described) 'is `fed Iinto "the .unit 'D .over spac'ed-.a-part guide rolls individual thereto 'as 'at 164, vthese rolls be ing mounted ion an .inclined supporting trarne 65.12'and `[from `these .rolls .the webs tare fed `:all in fa "correspondingly incl-ined direction :and in superimposed :relation vthrougha glue applicator 66. which prints along the downwardly exposed, stepped 'edges' 29a, Fig. 2, :of fthe-:successive paper plies, 'glue li-nes as shown fat. 61 of Fig. .29; this viewxal'so showing r4the @various plies roi fFig. 228 :as

`superimposed onfthelpagodaD'and gluedztogether byfthe transverse .glue lines '40, 5 I 55,163.y (Fig.z28s).. 4fFromthe vglue applicator @66, ,the superimposed foldingthe ylateral :edges :of the .plies -over into a. itub'e, -with KIthe :glue lines 61 "forming Llong-itudinal seams, .respectivel-y, iin ithe .manner illustrated at 61a AClig. v30), Vthe unit E vbeing fof fla.

suitable known con'stru'ctionffor :shaping the .webs Vinta a vtube, and being followed lby driven fpull It-Willibenoted'thatthe:roller and the vglue applicator d'6 permit the webs Lto travel :at van angle l` to fthe #vertical and Yon down to Y.the ftulie formingdevice, without `any substantial change di 1 direction *.from the 4point where the'webs are superpos'ed, and :until A.the starting of #the folding over-:of `.the .webs'in:1';he.unitIE,v and :that the-)superposed lwebs I'passinto the unit yE atan angle iin the neighborhood of fl'itothe vertical. lit has beenfoundfthatthis arrangement isssuch that any tendency of the webs'to come apartgat the pei-.forations is eliminated at these regions. `n the other Shand, '.if the .Webs after being :superposedn'and. glued together, .should che .carried a-rnund` afsubstantial lpart 'of :therperiphery :of any roller, the-differences in tension between the fina.

ner zandnouter :webs .'.tends :to :cause .separation df the tuhlengthsat thefperforations. Also,i'fztne angleatwhi'ch .the webs passv intothertube iorm= ing unit varies by more than faboutiLforaexample,.ei.theriway. from the A25.shown,the;same difcnltymay arise. 1

The: thus-formed multi-ply.bag-tube.:is nowf ed through arslitter 'l2 :for longitudinallyaslittingthe,. bag-tube` at successivefbaglengths and fnear @the .Y

oppositel sides frthereof, Aas :shown at -13 .and "it, Fig. 30, theltube. passing .thenceunderra putter I'fior'transverselyv cutting the tubeatbag lengths from. the 'longitudinal slits 13, 'M :outWa-rdlmfas shown at vIt and il, Fig. 3l. :Coneurrently :with the cutting;operation, .the .tube Viszseparated :into bag lengths .by `pull rolls 18 and li9,haunted respectivelyon thefentry and :exit sides; of the-:eut-

onto discharge and-conveyor units which may 'zb'e of conventional .construction and .are Inovv :ready for `the bcttoming operation, as gpartiallyfindicatedV at 8|, .Figl-but'iormingfno partei the present invention.

; Allteferring..now to .the detailed .construction of.'

the fvarious .pieces of apparatus above referred to, @the perforator and glue applicator .units 5A.' Band C, are .all A.constructed in generally similar iashion,fwith 'the nexception that Vthe .first unit Acontains only one glue applicator 39, while .the secondunitB- contains :two glue .applicators 'iand 5,.and-th'e last unit .C contains but one fglueapplicator 62. Accordingly, a detailed description of but one perforator and glue applicator assembly will be required, namely that of unit B, la, shoivniin detail in Figs. .3-13 inclusive.

.It willace noted .that the series `oi units A, ,B and 1C `aie located in spaced-apart relation sothat 1there .isa passag-ewayravailable;on each side of each .unit aiiordingeasy access .by the .operator to sthe iperorating mechanisms .35, i6 and ',611 las well Vas '-to eah of .the gluingdevices, without'dismantling :any oi the equipment. Also with this arrangement ofzthe .perforating and Vgluing zunits. oneormore additional similar units may heprovided, 'if .,desired, ifor `the vmanufacture of .fsix .or seven ply bag tubes,- orin case the machine iis'to be .used only for threero'r fourzply bag tubes,one of .thezunits -shown may be readily Vomitted with a saving of space and without modication of themechanisrnszof the other units.

In Fig..`3 thepainof paper Webspassing through the .unit tare .designated generally Yas Wl Yand W2, in order that the following description will apply to any .and all of the units A, B and C. In Vthese figures the .perforatorg designated generally by the numeral 39d, comprises a transversely-ex tending, stationary perforatorfbar 9! serrated or toothedalongits upper edge, as .Shown at S22-(Fig.

n 1l) and :a oo'acting, ,driven perforator roll L53...'

having mounted thereon aseries of three'beveled cutter bars 94, 95,`9, the beveled edges-of which sweep: across the Y serrated edge i S2 of the stationary perforator bar Q1, thereby to perforaterthe paper plies in the manner illustrated in .28, as the .moving cutter 'bars sweep across the stationary'bar. The rotary member '93 rotates once for each bag length-oi paper webs fed .therethrough, Iand moreover, driven at such speed that thecutting edges of `the rotarycutter-bars 94-96 travel 4at a greatencircumferential speed than thelinear speed of the paper-Webs Wl, `W2, passingthrough the lperforator. As hereinafter explained imore Tully, While the rotary 'cutter blade'g is always driven at the rate of one revolution :per bag length; 'the linear speed-.ofthe paper webs is varied depending uponthe desired length Vdf'the bag tube being formed. Assuming that the machine `is constructed to form bag tubes;of differentl lengths .varying from some 20 inches up to-48 inches, for eXample,-then to per` mit the perforatingknivesralways to travel at'fa greater -speed than the paper Webs, the .rotary member V93 maybe rnadevvith a'circurn'ference' at "thecutting 'edges'for example of about 54 inches. As 4will be -nodfrom rigs/fz and y1,2, the rotatable cutter bars '9d-S6 are so adjusted that their cutting edges will be Vat a s'lightangle withv respecte to the stationary bar 9i ,so 7that the perforation apertures will .be .formed in succes'- sion. across .the webs with ashearing effect, and sincethe rotatableblade-edges are always moved at a speed faster than the webs, this shearingeffeet kwill take place without .tearing and without.. any objectionable variation in the widths of the perforation :apertures :in .a :direction :'longitirdi nally f of .the wena. despite variations .in thegweb speed-for different-bag, lengths. 'I-Iente itisnn-fv necessary :to xvalythefspeedor .radius Lof ltlreper.

various bag lengths. i I f The stationary cutter -bar 9| is adjustably `:mounted on a supporting structure 91, by means of set screws 98 passing through slots 99 in the -cutter bar for permitting adjustment thereof, vertical adjustment of the bar being additionally yeffected by means of vertical adjusting screws |00, threading into the supporting structure 91.

1 Referring to Figs. 7 and 11-13 in further detail, Athe middle cutter bar 94 is mounted on a blade holder having three slotted lug portions |02 on its upper side adapted to be bolted as indicated in circumferentially adjustable position on the rotary member 93, there being four similar slotted lugs |03 along the lower side of the member |0| adapted to be similarly bolted in adjustable position on the rotary member. v'Upon loosening such bolts, the cutter bar 94' as carried on its holder |0| may be adjusted circumfer- "entially of the rotatable member 93'by a rack and `worm gear arrangement |04, as best shown in Fig. 11. That is, the worm gear, as shown, is mounted upon a shaft carried in bearings as at IOS- |07 formed on the inner face of ther5 member l0 I, the shaft being adapted to be turned by applying a socket wrench to its end portion |05. The rack |04 with which the worm lgear l0 essary to adjust these circumferentially of the rotatable member 93. Instead, in order to accommodate bags of diiferent widths, they are engages is of arcuate shape and may be secured as by screws, as indicated, within an arcuate cavity |09 formed in the surface of the rotatable member 93.

It will be apparent that the Aadjustment of the cutter bar 94 circumferentially by this arrangement'will serve to variably displace the line off perforations formed by this bar with respect to the lines of perforations formed by the bars 95-96. Thus, when the speed of the webs ls altered to form bag tubes of different lengths, the position of the bar 94 may be,

quickly adjusted so that the amount of the step between the lines of perforation at the middle ofthe web and the lines at the sides of the web 'Q see lines 36, Fig. 28) may be readjusted to main- .tain the desired step, notwithstanding the more.l vrapid or less rapid movement of the Webs.

shown in Fig. 12, a graduated scale |08 may be VAfixed on the rotatable member 93 so that with an accompanying pointer |08 mounted on one of the lugs |02, the operator may readily deter-, mine when the cutter bar 94 is in proper position of adjustment circumferentially. That is, vthe gradations on the scale |08 may correspond to the different desired bag lengths. As best .shown in Figs. 11 and 11a, the 'cutter bars may pas .be formed with a series of slots as at I I0, extend- ,ing circumferentially of the rotatable member 93 and in which bolts or screws I I0' are positioned to secure the cutter bar to its holder. The holder may be formed with an outwardly projecting and O 'longitudinally extending flange adapted. to

Yreceive a series of screws |I2 for adjusting each portion of the blade or bar circumferentially, upon loosening of the bolts I l0'. The cutting edge of the blade may be adjusted radially and ;.-.5

'held in its desired position by a series of set screws as at ||3 located along between the edge of the blade or bar and the carrier |0| therefor.

`The active edge of the cutter bar 94 may be dulled or rounded olf for a suitable distance as made adjustable in directions axially of the rotary member 93. This is accomplished by providing the member 93 with longitudinally extending slots as at ||4 for receiving bolts ||5 which clamp lugs ||6 on the blade holders, in position upon the rotatable member. The blade holders for the cutter bars 95, 96 may be provided on their inside surfaces With a small `key Aor bar adapted to be received in a slot as at 8 (Figs. 11 and 12a) extending throughout the length of the rotatable member 93, this key Iand slot arrangement permitting the holders for cutter bars 95, 96 to be normally applied at the proper circumferential position and there held against circumferential movement while being adjusted endwise and bolted in place. AAs shown in Figs. 3-19 inclusive, two glue applica'torsare illustrated generally at |30, |3I, but `a description of one will suiiice, namely |30,

since the construction and operation of theother applicator 3| Amay be identical therewith. Accordingly, the glue applicator includes a back-up roller |32 under which the web W2 is fed, andv a co-acting, rotary glue applicator |34, along which are mounted printing pads |35, Figs. 3 and 4, for printing on the web a transverse gluevpa-ttern of the desired configuration, such for example as is illustrated at in Fig. 28. The

glue applicator |34 is so driven as to rotate once `for veach bag length, and the printing pads |35 are so positioned radially as to engage the paper web W2 as it passes under the rollerV |32. Y

Glue is applied to the printing pads |35 from a bath |36 thereof, contained ina glue pan I 31, into which dips a glue pick-up roll |38 driven in the direction of the arrow thereon, this roll rotating first against a doctor roll |39 and thence against a transfer roll |40, the latterfor transferring the vglue vto the glue pads |35 of the applicator 34'.v (If desired the doctor roll may be `rotatedl step-by-step through a conventional of, the latter transversely of the direction of web feed, and also to permit vthe pan to be quickly moved out into an accessible position between the perforator units or stands, from which position the pan may be carried endwise out of themachine. To this endthepan is mountedon rolls, as at I4|, which travel in grooved guide'ways, as at |42, of V-shaped supporting members |43, which are grooved along their lower edges for slidable adjustment along supporting bars |43 having flanges slidably engaging said grooves and also being slotted along their sides to slidably receive complementary ribs |44 of inclined guide members |45 (see Fig. 4). V ,l

For providing vertical adjustment of the glue pan and to move it sideways into the above-mentioned accessible position, a handwheel |46 is mounted on a shaft |41, having secured thereto large pinions |48, |49, and small pinions 548", |49', which mesh, as shown, with rack members |50, |5I, and |50', I 5| respectively, mounted on the V members |43 and the supporting bars |43', as shown in Fig. 4. Byrotating the handl wheel |46 said large and small pinions are rotated and engage their respective cooperating racks whereby the supporting bars |43' vwill be moved relatively slowly and at an angle somewhat down- V'Wardlyand toward theA left. as vlewedin Eig.. 3,

. a somewhat faster rate, since thelatter. are moved by pinions larger than those which movefthesupporting bars |43. When the racks. are moved to thefextreme position toward the left (Fig. 3) the glue pan as carried on the members |43 ,willl be quite rigidly supported out inaccessible position, where it may be readily carried endwise out4 of the machine for cleaningv orv replacement. At this,`- time the supporting-members |43.will extend part way out along. the members |43 and provide the necessary rigidity to the supporting structure. Thismechanism provides a veryrcompact arrangement which may be operated. easily and quick1ynot only to-remove the gluepans for` cleaning, but also to-permit a suil'icient degree of vertical and. lateral adjustment thereof, if desired.; j y

Ashereinabove indicated and as shown in Figs. 24 and 2,5', the main pull rolls ofthe machineare located at 1I following the, tube forming. unit, *andr these main pullrolls ordinarily serve to de'- termine the speed of travel ofthe webs, butin view of the long lengths of the webs. in passing through' the machine over numerous .rolls and the varying tensions which may occur in the inf dividual webs, it has been found desirable to providethe'pull rolls asat |.52-I'55'f0r each web individually atlocationsl ahead of the. perforators, to act as auxiliary pull rolls when needed; That is,` the web Wl, for example, in passing, over. the rolls |54 and |55 follows an S-shaped path and upon the occurrence of any substantialtension in this particular web, its frictional engagement vwiththese rolls will cause the necessary forward tension to be appliedto the web at this regionv to insure against any likelihood of breakage of the web. as might occurif all of the necessary forward" tension for advancing the web had' to beV applied by the main pull rolls 1|.. On the other hand, if the main pull rollsare. advancing the web in a manner such that therek is very. little tension therein at the region of its S-shaped path over the rolls |54-|55, then these rolls 'will' not have sufficientV frictional engagement with the rweb' to cause itv to be advanced excessively and vwhich linked to shaft |16 through a clutch mechanism |11. Shaft |16, in turn, drives shafts |18V and |19 throughloeveled.gearsv |80 and.. |81, respectively. Keyed to shaftsv |18 and. |19, respectively, arey driving pinons |84, |85, which mesh with gears |86, |81, the latterbeing car.- ried yby theshafts |86, |89, on which the rotary glue applicators |12 and |34 are respectively mounted. Gear |81 drives, through a train of gears at (Fig. 4) the series of glue rolls |38, |39 and |40. In similar fashion, pinion |86 drives through a train of gears similar to |190 (but..not shown), the glue applicator. rolls of4 the lower gluing mechanism |3|. Y

vThe rotary perforator drum 93 is driven-from pinion |95v through the concentric intermediate gears |96 and |91, Fig. '7,.mountedonshaft |98 andgear |99, the latter mounted onshaft260'of the rotary perforator drum` 93. For disconnecting the perforator drum 93 independently of the drive above described, gear |96 is loosely mount- .edY on the hub of gear v|91 in the manner. illustrated in Fig'. 7, and is provided with a resil'ientl'y retractable 'pin 20| which engages a hole. drilled in the face of gear |91.

The gear. |99 is of annular form. mountedupon a` central hub-like portion |99' and adapted to be secured thereon against rotation, as by set screws, as indicated. As shown in Fig. 8, the gear |99 may be provided with a graduatedV dial around adjacent its periphery, for cooperating with` a pointer mounted on the hub portion |99 so that when the set screws are loosened', the angular position of the hub and rotor. 93 may be adjusted with respect. to gear |99, thereby to adjust the' angular position of the perforator knives with respectv to the remainder of the drive mechanism, and with respect to the angular positions of the perforating knives at theother perforatorA units. This enablesadjustment ofi the positions of .the perforator knives on each rotatable perforator member, as necessary to accommodate the machine for the manufacture of bag tubes of' various different lengths. That is, by thus adjustingthel angular position of the kniveson each rotatable' member asv at 93, one mayv in effect adjust the length of the path of the'web from the point of'perforation tothe point where all the webs are. assembled, with the several lines of perforation on each in the desired relationship, which occurs in the region ofthe longitudinal glue applicator 66 on unit D of. the machine.. As hereinafter explained, minor adfjustment of the relative positions of the perforations onjthe assembled webs may be made by-padijusting Vthe relative positions of the rollers 6 4 'on the unit D', but when the length of bag to be made is altered substantially, it will be necessary to angularly adjust the rotatable members asat 93 bythe use of the dial, as shown in Fig. 8. "At the same time it will also be necessary to adjust the drive gear |81 for the glue applicator roll |134 (Fig. 10). Accordingly, the gear |81 is mounted upon a hub and adjustable thereon with an indicator dialsirnil'ar to that shown in Fig; 8 for the cutter rotor. These dials may be graduated in terms of bag. tube lengths.

Referring to Figs. 14 to 23 inclusive for a detailed description of the pagoda" assembly shown generally at D in Fig. la, and referring