US1176163A - Paper-bag machine. - Google Patents

Description

A. POTDEVN.

PAPER BAG MACHINE.

- APPLICATION mw Nov. 12. 191.2K

jatented Mm Il SHEETSM SHEET POTDEVEN.

PAPER BAG MACHINE.

APPLICATION FILEDVnov. 12, 1912.

Patented Mar. 21, 1916.

Nawal 11 sHsETs-sHiiT 2.

SI1/we wlc Qq) vi me on c.

Mmmm` PAPER BAG MACHINE.

APPLICATEON FILED NOV. i2, i912.

3 T E E H S M s T E E H S A. POTDEVIN.

PAPER BAG MACHINE.

AEPucmoN man Nov. l2, 1912.

Patented MdrE 21, 1916'.

A. Femm/1N.

PAPER BAG MACHINE.

APPLICATION FILED NOV. I2| I9|2.

Patent/@d M111: 21, '1916.

II SHEETS-SHEET 5.

a fm @m Wim/Ww A. POTDEVEN.

PAPER BAG MACHINE.

APPLICATION FILED Nov. I2. 1912.

Patente Mar. 21, 1916.

ll SHEETS-SHEET 6.

A. PODEVlN.

PAPER BAG MACHINE.

. u APPLICATION FILED Nov. I2. 1912. Lf, l Patented MII?. 2l, 1916.

l1 SHEETS-SHEET F.

A. POTDEVIN.

PAPER BAG MACHINE. n

APPLICATION FILED IIov.VI2. I9I2.

`1,1'76,1 63. Papented Maf. 2L 1916.

,v A. POTDEViN.

I PAPER BAG MACHNE. APPLlcmo'N min 11ov.12. 1912.

Patented Mar. 21, 1916.

I SHEETS-SHEET 9.

A. PTDEVIN.

PAPER BAG MACHINE.

APPLICATION mep Nov.12. |912.

Patented Mar. 21,1%@I

1! SHEETS-SHEET 10.

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STATES PATENT orrion I Anonrn ro'rnnvm, or iano'oxnrmnnw COMPANY, or'BRooKLYN, NEW Yo 'L j i Peruanas MACHINE.

To allwhmi may concern; Be it known that l, ADoLrH Po'rnnvrn, a citizen of the United States, and resident of Brookl. n,in the county of Kings and State of New York,have inventedy certain ynew and useful.:Improvements ifn Paper-Bag Ma4 chines, ofivhich the following is a specifij cation. w

This invention relates tol machines for makingpaper bags, having reference, more especially, .to that class of automatic' machines whereby Ya web of paper lis progres-l sivelywtransformed into tubing which.,` as j rapidly as it is produced, is converted into `bags.ofpredeterminedV length. j

l The principal object of my invention is to j provide', in a bag 'machine ofthe class referred to, r'nechanismi of simple and eiiicient .construction and operation whereby bottoms O 'are formed ontubularbagblanks.

` .Thef invention, as generally stated, comprises various novel' features'of construction and organizations of mechanisms, whereby the 'successive' operations ofopenirig the bot- ;5 tom ends of the tubular blanksand orderly folding. and `closing the same to produce'soi called `sojn"a`re Satchel-bottoms. are accomhereinafter described and claimed.

y l Vhile .l have herein illustrated my inv'ention` withmachines'for' the production of other? well-known types of paper-bags. IntheJdrawings-Figure 1 is a side'el'evationofabag making machine equipped with the;tubecutting mechanisms, and the bot- LO- tom-forming mechanisms embodying lmy in.-

fven'tion.` Fig. 2 is plan of the said tube-cuttingf'and bottom-forming mechanisms. Fig. Bis alongitudinalvertical `section ason the `line of Fig. 2, the cylinder being partly brokenaway toexpose thegripping devices. Fig. f3 is a sectionaldetail ofthe adjusting means Ifor` certain cam-actuating devices hereinafter referred to, ,as on the line 3EL of ofthe gripper .cylinder` illustrated in Fig. 3,

' its'sha'ft and several other parts being lshown l in section. "Fig 5 is a..- transvers`e section through the stationary sldefolders, as on the line `5'--5. QfFig." 3'. Fig. 6 is. an eleva-Y YORK, Assrsnon To ro'rnnvm `iranienne i vSpecifcatio'n of Letters Patent. i Patented Mar, 21, 1916, l Application tiled. November 12, 1,912. SerialNo. 730,973. i

tion of the upper forwarding roller with its 'fold-gripping lingers andadjuncts, the said fingers and their connections being shown at one end of the roller` in vertical section. In this view the fingers are illustrated in their normal non-engaging position beyond the outer folded edges of the bag blank which is j indicated by thedotted lines. Fig. 7 is a View similar to Fig. 6, showing the side fin gers in raised position preparatory to their being moved toward and upon the folded edges of the Vbag blank. Fig. 8 is a similar l view showing the lingers as in gripping posi- .tion rupon the bag blank. Fig. 9 is an end View of Fig. 6. Fig. l0 is a plan of Fig. 8.

Fig. 11 is an elevation of th'e side gripping fingers and adjuncts of the gripper cylinder, showing in section that part of the cylinder in which the supoorting members for the fingers are slidingly mounted, and also portions of the cams for actuating said fingers, said lingers being represented in the raised position which they occupy. just before gri ping the bellows-sides of the bag blan Fig.- 12is an end elevation of Fig. 11. Fig.

13 is a view similar to Fig. 11, showing the' fingers in the position which they occupy held `by said fingers and clamped by the forward transverse gripper, and also showing therearward transverse 'gripper as open and the blank being introduced thereto by l the rotary tucking blade. Fig. 16 is a plan of Figs 15. Fig. 17is a partial end View of the cylinder, and the end Hap-holding den vices associated therewith, a bag blank being represented upon the cylinder with the rearwhen they are withdrawn from the bagward bottom Hap being folded by the travel, f

ing folder roller. Fig.18 is a sectional' side elevation of one of the carrying chains for the folder roller, showing the curvedv guide for the chain. Fig. 19 is a detail of the cyl4- inder showing the action ofthe final folding l l roller upon the bottom of the bag. Fig. 20 is Fig-,1 3. Figxli isa view yof the opposite side adiagram'illustratingthe condition of successive blanks from the cutting station to va point 1n advance ofthe-tu'cking'devices; the leadmg portion of the bellows-sided tube krollersjand about to be severed the just preceding blank as being -gripped andopened to produrfge'the lateral tucks' and the up-p'ro'- :jecting fiapsfor the bottom; -and the leading blank as grippedupon rthe transverse in'g folder roller. Fig-21 is a diagram illustrating'the condition-'of the bottom portion Y of the -Atube a's it is being carried through the side folders lby the cylinder. Fig.,22 is aA plan of Fig. 21. Fig. 23 isa sectional elevation ofl the forwarding 'roller as, equipped Witha'fmodiedform of finger gripping deshowing a part of the adjacentcylinder and vices. Fig 24fis an end view of Fig. 23,

one of its gripping fingers which co-act with the 'gripping devices of the forwarding roller in..prod u`cing.vthe `lateral tucks of the bag bottom..

l. designates :the main supporting frame which is of suitable shape and size for its .intended purpose.

. 2.I is the main driving shaft journaled in suitably-located ybearings in the sides of the main frame. At oneend of the frame Vis mounted` the roll of paper (A, Fig. l) from which the bags are to be made, which paper is impelled to suitable pasting`,forming and slitting devices by'means ofy which itis rovgressively converted v into a bellows-sided tube having atv prescribed intervals. pairsof parallel longitudinal slits-at and' ,transversely of whichthe tube is periodically' severed in order to convert it intobagblanks preparatory .to the bottom forming operations .upon .the forward slitted portions of the successive blanks. Inasmuch as the means for converting the paper into the bellows-sided and slitted tubing is old, and as my present invention concerns especially the treatment ofthe tubing after it has been produced, it is not deemed necessary herein to show or describe in detailthe tube-forming and slitting mechanisms other than to indicate ltheir general arrangement ini ,res ect to the cutting and bottoming devices. seerigng At the delivery end of the tubeforming mechanism projects the usual forming plate 3 which vis substantially equal in IWidth to -the `internal width of the .tube and which \r' l plate 1s incased by the tube during its travel. The free edge of this platel extends at'l a right angle to thepath of travelof the tube,

or substantially so, and is preferablyL ser? i rated as .at 4. Immediately `abovethe plate and slightly in rear" of its serrated edge is a bar 5 theforward edge of which is also preferably serrated,` as at' 6.- Hence ifthe leading end of the tube be advanced beyond the serrated edges and be securely held, and f Ythe portion ofl the tube contiguous to. such f Forwardly of the cutting members is a a gear wheel 13 on the driving shaft through ter,l the .upper and lower sides' of the tube will. be transverselysevered along the lines "of theserrated edges, with one sideof the Itube extending slightly beyondlthe other` as usuali l i. f fold lines of the vbottom and with the rear- Ward flap extendingv upwardA in'position to" be acted upon and folded down by the travel- The progressive feeding, of the leading, end ofV the tube to and beyond the serrated cutting members is effected by a pair of roll- 1 'ers 7 (Figi.` 8) which constitute part of the 75 usual tubefforming and slitting mechanism which rollers are concertedly driven by appropriate gearlng. including the I neshinor gear wheels 7?* (Fig. 1) on their respectiv shafts. x80

pair Of'parallel shafts 8 providedwith in? termittently-acting pinch rollers 9 (Figs. 2

fand 3) between which the leading end ofv the travelin tube extends, said rollers be,-

lng provide with peripheral ribs 10 which are so disposed as to bite and clamp the tube. at predetermined intervals during'its travel` and thus temporarily check the advancement 'of the tube. Theends of the roller shafts. 8 are. provided with meshing gear Wheels 11, (the upper one of which is shown in Fig. 2') the lower shaft being provided witha gear wheel 12 which is driven from an intermeshing idler gear 14.' (See Fig. l). Thus the pinch rollers are continuously driven. The timing and relation of the lparts are such that the clamping of ,the tubey y the pinch rollers is edected when the slitv ted portion of the tube is in proper position for .severance at the serrated members; A t this .juncture an upwardly-traveling bar 15 is brought forcibly against the underside of the tube, immediately. in fro-nt of said members, therebysharply severing the bag blank from. the body of the tube. This bar .is car-A ried a pair'of spaced endless chains 16 whichpass around upper and lower sprocket Wheels l1 7, 18 respectively. The upper Wheels areloosely mounted on the shaft S' Vand the. lower Wheels `are fixed to a shaft 19 Vand that,l as thes'eclamping Iand. lsevering mechanisms `comprise continuously rotating parts they can be. efectlvely. driven'at .a

relatively highspeed. i

When the, tubing has .been .advanced into 130 lfreeend extends between a. pair of drawing rollers v22, 23, one (22) ofmvbich is mounted .on themain shaft and the other {23)jon an -,upper parallel shaft 24.` The periphery of the upper roller is mutilated as at 25 in `order thatthe bag blank shall be intermit- `tently grasped and released by the seg mental acting surface 25 of the r'oller, such imn'iedituly after it has beenv severed from "the bodyof the tube and released by the `pinchrollers 9 and being of suiiicient circumferential' extentto advance the blank to the bite of a pair of forwardingrollers 26, 27'which are carried by parallel shafts 28,

29, respectively, having their bearings in. boxes in the sides of the mainframe. The

`roller 23 is secured to its shaft 24 by means of a set screw 23a (Figs. 2 and), in the hub ,of the roller, whereby said. roller may be nicely adjusted about the' shaft inorder toi set'itsacting surface -at any vpredeter- Vmined positionin relation to the'roller 22',

as the length of `ftlie'bag blank may require.

22 'is provided with a--circumferential elec j tro-type which is designed, by its rolling contact with the opposingfside of the traveL 30 ingbag blank, to print any suitable' matter- 'w thereon,...` [In Fig. 3 I have illustrated acouple jo Y bedriven by suitable gearing.L .35 The shafts-of theforwarding rollers 26, 27.are provided at one side of the machine :with meshing. gear wheels 33,' and the lower shaft isprovided at theother side of the :4 0l an idler whioh, in turn, meshes with the gear Wheell .on the drive shaft. Thus the rollers 2G, 27- are `properly'driven in order y blank toward the grip-` f ylinder 3.6.` his cylinder is carriedfby aft37 whiohshasits bearings .in boxes in e@ sidesof l the mainframe. On one end of shaft-is a` gear wheel 38-in mesh with v3.9 whidh, in'turn, meshes with the eel 34 on the roller shaft 28.

.understood .the speed at which the fed t'oand across the path of the nd gripping mechanisms deter- -,thej, length of 'the bag blanks, such aan filer rollers 7 ;V and` as the `cylinder and rlng roller aredriven at a fixed speed tively `zto. eachgfother it has heretofore nnecessary to' adjustv theinbodily toward `fror'n the feeder-Oilers 7 inorder to adapt `-empio t, however, of drawing rollers of thenliaraceab ye described,`lamenabled fjsimply by the fota'ry adjustment of thel 4roller to yvary its point and period of ens jposition to beiclamped by the rollers 9,"its

filinkingrollers 3,1, 32 for applying l. the ink to thetype block, which rollers may machine withla gear wheel 34 in'mesh with one end with anl arm 47 bearing at its free termined intervals of their traverse the'n' eing prescribed by the gearing ofl sa forwarding roller and cylinder. to 1re-' Lv .il:.ceiyeiblgnkgg`Qofsdiiferentlengths.` -By the.

gagement with the -roller 22 tof'acegrd with the predetermined length ofthe, blgtijksand thus accomplish their uniform residing and delivery to the forwarding roller and grip- 'pingcylinder. 70

On the periphery of the upper forwarding roller 27 is a. pair of spaced points 40 which are so locatedthat when the leading end of the bagblank enters between and is gripped by the rollers 26, 27, the points 75 lpenetrate theopposing tonguesl formed betweenthe parallel slits in the blank and thus positivelycarry the blank onward against the surface of the upper roller 27 A curved guide plate 41 (Fig. 3) arranged adjacent gdr; the upper` roller, insures the upward dev flection of the leading end of the blank,i At a suitable distance apart on the periphery 'of this roller, parallel with its airis, are creasing ribs 42 which engage the opposing g5 surface of the traveling blank and, in coaction with correspondingly located grooves in the lower roller, crease the blank transversely to provide properly spaced fol lines for the bottom of the bag. 9o As the blank is being carried upward by the roller-27', the free outer end of the tongue formed between the parallel slits in the under layer of the tubular' blank, springs forwardly against the opposing periphery .pf 9.5 thecyl-inder 36 and is there received and i grasped by a pair of vibratory gripping fingers 43 which extend through a, slot in the periphery of the cylinder.. The under tongue just referred to is somewhat longer than the other tongue and the prolonged.

` por-tion of the former, extending beyond thel points 40, springs outwardly and is grasped by the gripping ngers 43. These fingers are carried byblocks 44 which are clamped toa Arock shaft 45 having its bearings in inwardly-projecting lugs 46 on the rim of the cylinder, 'which shaft is provided at or near Afingers, to receive. the leading end of the .tongue as the blank is being carried upward -by the roller 27 and .then perinitsthe closing of the iingers against the tongue; and

the cam 51is so located as to effect the open.

fing vofthe fingers and the release ofthe tonguel after the blank has been impelled about halfjfway varound the cylinder and just before Vthe operation of completing the 136 j vablestop `forthe block against the opposing j `end of'therolle'r, and thus permits the pressure of thefmger upon the peripheryvof the 'rollerzto be nicely determined.

i i vThe inward movement of the sleeve and its appurtenances as just described is effected l during the rotation of the roller27, sothat the finger will be brought gradually to bear upon and travel concurrently with the un derlying folded edge portion of the bag i blank.` When the sleeve lis retracted the block and finger are caused to resume their normal position to free the edge of the block and quickly raise the finger.

1 grip and thentorelea'se the opposing folded sleeves is provided at its outer end with a suitably-,disposed cam projection78 which at theproper time) encounters a relatively ,fixed stud or roller 79 which forces the sleeve inward,` such sleeve, when `the cam lprojection' clears' the stud or j roller, resuming its normal.outerpositiom a y Y f The studs or 4rollers 7 9` for the respective vsleeves 'are 'preferably mounted on brackets 80' formedon collars 81l which are loosely `applied to the shaft ofthe upper roller 27, `and i are provided with adjusting ldevices whereby the studs `or'jrollers. canbe nicely j set to the proper points of action with respect tothe travel of the' cam projection. Inthe present instance each ofthe collars the outere'nd of which extends adjacent to I a fixed `bracliet 83 on the side of the main frame, and;` 1s secured to said bracket by a c adjustment ofthe arm 1n a vertical are. A `spring 85 secured `at its respective ends to .je the arm `and mainframe tends to dravv'down the youter end ofthe arm, and aset-screw 86, which is applied to that end of thev arm in position to bear upon the. bolt, affords a Vready -means whereby the arm can be very nicely adjusted inopposition to the force of the spring, preparatory to the tightening positionv 'of adjustment. By referenceto Figs. 11-to 14, inclusive, Q the' construction fand operation ,of the tuck appear. These -ngers comprise comparaftively long. metal plates which are affixed f `"to blocks87 at the respective ends of the cylinder in lline with each other. IThese blocks "are formed on or affixed to the outer ends of -two shaft sections 88, 89 respectively,-which ar'elrotatably supported in a bored projection` on,` the` inner side of the gitudinal movement relatively to each other.

\ i blank,'the spring initially acting to tilt the 15 i The sleeves. attherespective. ends of the roller are simultaneously actuated, first to `edges of the blank. To this end each of theV is provided with aninclined radial arm'82,.

screw-bolt 84#the .i slot for which, in the -ar`m, is'elo'ngated inord'er'to'permit limited 'ff of the boltafnd the lockin of the arm in its' lSee Figs. 2, 3,391..

' `fingers-65and their'actuating parts will cylinder, which sections are capable of lonf They are connected by a shaft 90, which is fast to one and is slidingly fitted to a longitudinal bore'v in the other, theA latter `being slotted, ras at 91, for the reception of a reside piece 92 on the shaft 90, whereby thi' "two sections can be rotated as a unit and yet be capable of relative longitudinal movement. i

Within the bore of the bearing projection, at a point intermediate the shaft sections, is-secured a head V98 between the oppositev sides of which andthe opposing ends of the respective shaft sections are interposed springs 9d which tend to maintain the sections normally -1 projected be-. YQIKl the adjacent ends of the, cylinder. (See Figs. 11 and 13). On the outer end of each of the blocks 87 is a roller 95 which at ajpredetermined time encounters a segmental cam 96 conveniently secured to the `inner side of the maink frame, said cam be` y ing constructed and arranged to press lthe opposing shaft lsection and its parts, including the finger, inward against the action of the spring 911l and tomaintain them thus positioned for. a prescribed period.

See Fig, 11);

, The fingers are normallycaused ytoibearupon or vrest near the periphery of the cyl blocks are constructed to force the armtemporarily' outward in opposition to the action of the spring 97 and thus swing the two fingers 65 away from the periphery of the cylinder.' (See Fig. 12). When the roller escapes the camblocks, the fingers ll.;

resume 'their normal bearing position. The

initial end of thecam 96.', and :theadjacent cam 102are properly disposed in 'relation to each other in order that the lifting of the vtvvo'fingers shall be simultaneous, and that the combined inward .andl .lowering motions of the fingers shall be concurrent. (See Fig. 12.)' As the fingers are' designed to'enter the intuckedporticns of the blank during the spreading thereof, as above described, the elevating surface of the cam y1027is constructetpanfl arranged to'eifect the raising of the iingersfioefore they reach Ill-5 the gripping point, and the lowering sur face of said cam, together with the iiiclined initial surfaces o f the. cams 96, are`constructed .and arranged to effect the com bined lowering and inward motions of ithe fingers `immediately after theyhave thus.

been raised. i

The ,cams 96 have sufficient circumferenisc . tial ektent to maintain the fingers in their inward .gripping position until the bottom 'of -the b'ag has been lnearly completed at which time the rollers escape the said cams (See lig.l

andthe fingers are retracted. 13). The cam 103 is disposed adjacent the terminal end of the proximate cam` 96 so'v as to eiiect the requisite'elevation of the fingers just before or as they are withdrawn.

When the blank is engaged by the two' -sets 'of lingers 64, 65, as previously described, its free 11p-projecting vportions pass intofand between a pairV vof inclined -4 side folding-jmembers 105 which extend j ward on the cylinder, the folding members *gradually press the- 411p-projection :sides a (Figs. 20, 21 and22) of the blank inward' and downward upon the underlyi ing 'bottom portion ofthe. blank and aft fthe LSametime-flatten down the adjacent 25 end portions a2 of the blank, so that the tongues thereof extend in opposite directions as illustrated most clearly in Fig. 22.

" The fingers' 65 are released from" the blank at or about the time they' pass nbeyond the folding members. Each oftheside folding members comprisesfa bar having the inwardly beveled orfA inclined top portion 4'1'0'6flandftlie'tdepending. side .2107, the Vwhole 1 constituting, in effect, a Xed camof appropriete formy to impart the requisite inward' fold to the contiguous portions of lthedzravelirig blank. The lower endsv of the two bars are alixed` to and supported gripping fingers 43, are two set'sfof transr verse grippers 112, 113,' fwh1ch are;des1gned, st lccessivelyT to receive and crease ythe' bottom Mounted o n thecylinder 36 in s by means of clamp brackets 108. dependin from a suitably disposed cross-baronsha t 109, and' theopposite ends of'thebars rest upon the peripheryi of thejcylinder, and

are held in position by means ,of adjustable clamp brackets 110 on a cross bar-Sor'4 shaftI 111. (See Figs. 2,'3and l tion to each other,= immediately in rear of the portion of the blank, throughout itswijdth, after it passes from'the side folder g-.the re- 'zspective lines of gripping. being the v transverse creasing ribs 42 `on the roller 27 Vabove de-.

fold lines` of the bottomv defined by the ,"jscribed. -The forward gripper112 comprises a jaw bar whichv extends into--a,transyerse slot 112EL in the wallof the cylinder, one lside lE of said slot constitutingone of the ipper jaws. The jaw. bar is'aixed to areeJA shaft, .114 which isV j ournaled in -v lugs115 Lon the Tanner side -of the cylinder, [one end lof the vshaft being provided with an arm bear ling a roller 117 which, atipredeternnned 1n?- paced rela",

tervals, contacts with suitably-located 'camblocks 118, 119 andis thereby actuated-to open the jaw in opposition, to the actionjof a spring 120` which encircles a ,projectingv endy of the shaft and isvsecuredi to a collanon the' latter andto the adjacent lug ofthe-cylinder so as-to exertva torsional closing force on the jaw.1 The cam blocks 118, 119J are adjustablymounted, similarly to the am blocks 50, 51 above described, ona' 'segmental l frame 52a bolted to t-hcadjacent side of, the' 75 main frame. (See Figs. 2, y,3,-and 15.),` One (118) v01:' the camblocks is so,arranged.that p when the gripper 112 is directly above `the l axis'of the cylinder the gripper' is open; and at this juncture a rotating tueking blade 121 of usualfoonstruction impinges upon the blank, transversely thereof, and tucks `it be' tween the open jaws of the gripper. 'the bladevv in' its rotation recedes from*` the intucked blank, thejaws forcibly grasp and ltransversely crease the latter.

The tucker blade 121.is carried by an arm 122 on-a cross-shaft 123 which 'has its bearings in boxes in the sides of the main frame," sald shaft being actuated throughV al gear wheel 124 in lmesh with the. gear wheel y38A on the cylinder shaft. f .j The rearward gripper 113 includestwo- 'jaws whichextend into a transverse slot 125 in the wall of the cylinder. The forwardjaw comprises a bar 126m which is iixedgatits respective ends to'lugs 127 on two? annular frames 128 carriedI A.by thel respective ends of the cylinder, and the rearward jaw comprises af vibratory bar ahxed 4to' a roclrshaft 129 which is jour naled in said lugs and i: equipped at one end with an arm 130 bearing #roller-'131, which at predetermined intervals contacts .with the cam block 118 andganother suitably 'disposed cam block Allfonfthe frame 52a, and is thereby actuated periodically to open the movable jaw in opposition to'ithe, actionj. of a suitably-disosed spring 1321; "'.lhilsff spring encirclesa rojecting end of theshaftf-ll 129 and is secure to a collar on the-'latter 4and to the adjacent cam' .1fframe 128 sasto exerts-a torsionalclosing force on the ibratbry jaw of the gripper 113.-

.l As the gripper 113 approaches the` ftical plane of the axis o f thecylinder'thel y roller of 'the arm 130 encountersthe 'oppos K ing cam 118 and is thereby actuated to openl the. gripper; whereupon a rotating tucking blade133 4carried by an arrn'on theshaft 12,3,Vimpinges against thetopof theblank,

transversely thereof, and tucks itbetween. f, the jaws vof the gripper 113.,` This blade', similarly to its companion, passes' on'fromthe irl-tucked portion of the blank, andthe jaws' "thereupon -fbrcibly grasp andtr'nse verselyjcreasc the latter. In virtue ofthe )creasing or: bending action of the grippers .loo j' ".35 i i marginal portions "of theblankand press y 113 upon the blank, `the trailing ap portion PM2) `for. thefbottom springs'` upward after it'escapes the'` side-folding` members 106. (See Figs. 15` and 201) f The annular `frames are adjustable within .deiinjedf limits aboutthe axis 4of the cylinder sothag the extentof the space between thetwo' pairs of transverse grippers may be n f 'nicelyregulated to accordwith the width ,of thebag bottom... "To this end each ofthe bframes is provided with arms 134 radiating `from a hub`135 whichzis loosely mounted on y -the cylinder shaftf?, the framebeing adm justably securedvto said arms by bolts 136 .w

passing through arc slots in the f rame. The

two frames, are `provided withv corresponding peripheral.gearracks137 with which mesh pmlons 1 138 'onfthe respective. ends of the "shaft"13,9"wliiclrhas itsbearings in the arms 2o` ofthe 'cylindermwhereby when the bolts are'` loosened thegshaft may be partially tu rned,yto ,the right or. left,- by means of a suitable" key, so" aslvproperly to move the .annular frames .relatively `to the cylinder I" and .thusadjust grippersll carried tlierebyf toward orzfromlhe grippers`112, as desired. i lVhenfthe requisite adjustment of 'thegrippers has been etfcctecbthe frame is ylockedtin position by `theact'oi tightening.,y

thebolts 136.` ',.fp

Asfxthe cyli'lderjl f continues its movement with `the bottom portion of the blank trans- ,versely c`la1npeol by the grippers'll and 113, the blank is carried' under a pair. of dependingspringwfingers 142 which bearupon the thein. snugly against the cylinder. At this stage pasteiis applied to the in-turned sidefiapsjandthe leading end Hap t2 of the Iblanl" `by vmeans offa` rotary. paste-applying A devicewof usual"construction This device i comprises a U-shaped sector head 143 mountf ings. inboxes in the sidesof the main frame fand has at one endlavgear wheel`145 in mesh p withtlie 'gear wheel 3.8 of thecylinder shaft. j The head is "supplied with paste from .a

paste-`pan`146 byl means fof an interposed y `feed `roller 147; Lthe'shaft of which. is4

equipped with a pinionV 148 in mesh withthe d gear wheel 145. l. (See Figs. 1, l and 3.) i .lVhen thepaste has kbeen applied as just i `intermediate the `grippers." This roller is fcarriedby and between a'pair of spaced chains "1501.whicl1` pass around "sprocket ,wheels 151 on the shaft 144 and around a pairofsmaller sprocket wheels 152 carried Q shaft- 153- which has its bearings in' adl justable boxesin the sidesof the main framey just beyond the cylinder. Curved guides 154, corresponding with the curvature of the cylinder, are secured to the sides of the main frame, adjacent the respective ends of the cylinder, which guides are constructed and -arrangedto support and guide the `active stretches of the chains traveling adjacent the cylinder, and direct the .presser roller 149 ina path continguous to and corresponding with the periphery of the cylinder.' The chains are driven vat af's'peed somewhat` in excess of the surface speed of the cylinder, and hence the presser roller as it approaches the cylinder contacts withthe upprojecting flap and' progressively .folds it i down upon and intimately presses it against thelbottom portion of the blank (see Fig, 17).7 said bar finally escaping the blank and passingv outwardly around the lower sprocket wheels. The exposed pasted portion ofthe blanlnas it hugs the cylinder,

passes onward and is not engaged by the roller.

At or about the .time the folder and presser roller 149 contacts with the trailing upstanding portion ol Ythe blank the roller `of theactuatingarm 130 of the grippcrs 113 encounters the sfjtably-disposed cani-block 118q `on the frame 52a thus opening the grip-- pers 113 and freeing the portion ot' the bottom clamped thereby. ,Innnediately there- `afterthe roller of the actuating arm 47 of the fingers 43 encounters the suitably-dis posed cam-block 51 onxthe frame 52 thus .raising the fingers andv releasing; the engaged tongue. The treed unfolded portion a2 of the bottom springs partially outward from the cylinder,` Aand when the folder and presser roller 149 escapes the bottom portion of the blank this unfolded portion implnges Vaainst a folding roller 155 which is mounted to bear against `the periphery ofthe 'cyl inder `at a point below the lower sprocket `wheels 152. This roller thus, as the cylin-V der rotates, imparts ther-final fold to the bag bottom, as indicated in Fig. 19. The roller 155 isjournaled in boxes in the walls of the mair'itrame, and is Iprovided at one end with a pinion 15G which is geared with and prop-- erly driven by av gear wljeel 157 on they end of the shaft 153 through' an' interposed idler 15S. (See Fig-1.) Alltag, the final fold has been completed thegrippers 112' are released 'from the bag by the roller of their actuzlitingg,"

arm 116 contacting with the suitably-disposed cam block 119 on the frame 52?,gwa'nd thereupon the finished bag lisdelivered te. an

ofl`-bearing belt 159 which carries it to a suitable point of discharge. v

The diameter of the'cylinder is preferably i such that several successive blanks may be progressively actedl upon thereby lat the same time, as is common in continuous bag makilo ing machines, and hence the cylinder is prol vided 'with aplurality sets offcomplel mentary gripping devices 4,3v 64A `65 112 113 of the character rabove described;vv thd whole being arrangedwin spaced relation to each other throughout the peripheryof Ithe cylinder as illustrated inFig. 3. In the present instance there are three sets of these'grip-v ping instrumentalities, which are timely ac,- vtnated in their rotation bythe same'sets of cams, that is, the cams bear a predetermined l' relation to eachother and to the cylinder and correspondingly actuate eachA succeeding 'setbf grppers during the rotation of the cylinder.

In Figs. `23 and 24; I have illustrated a4 Islight modification. Aof ltheV gripper devices at the ends of the forwardingroller 27. In this construction the blocks 66 to,which the fingers Mare secured are pivoted to collars l 68 on the spring-controlled sliding'sleeves 69,69 respectively, so as to be capable of oscillation in the directionr of the aXisof-the roller instead oftdward the endsof the lat-V ter as fin .the lirst .described construction.

Eachof ythe blocks is held normally 1n aY horizontal or clamping position ley-means of a spring 7 5u which is interposed between the outerv portionv of the ,block and the collar.

On the outer end of the block is a ,stud 1160 bearing a roller ll-which, at proper times -in the rotation of the forwarding roller, 1m-

pinges lagainst kand rides under horizontal cam-l projectionswl, 162;a on a stationary ring 16d concentric with the forwarding roller,- thereb-y tilting the vblock and raising the inwardly projecting linger 64 thereof j outwardly beyond the periphery of the roller 27..v This ringv 163 is carried by the adjust.-

1 able disk 81 which is adapted Asimilarly to the Vcollar "81. hereinbefore described to be adjusted about the rollen'shaft 29 in order IQbears a cam head formedon the opposing to set the cam projections" 162, 162a in proper-y working position. @n the. inner face of the idislr 8Lm is an annular flangali which 'is with a projecting' roller '79fagainst which end of the slidingsleeve, the cam surfaces 78 of said headbeing so disposed inrelaitio'n to each otherand the cam projections 162. 1.62a that while the latter in conjunction *with-the springW are oscillating the block in respect to tlie`pferiphery of the forward-v .ing roller, the sleeveis being'pressedtoward or'retr'acted from tiney end of the vcylinder..

thereby irripartingthe 'combinedoscillatory and longitudinal movements to the 'iinger during the rotationof the vsaidforwarding roller. "When, the rollers 161, 79 escape 'their respective cams, thelinger 64ans reversely moved from its gripping to its 'original position.

The ring Lil is preferably adjlusta'bly se' cured to the flange 161iby means of a set screw 155, the llole .166 for which in the i ring is elongated in order that said ring and flange can be adjusted circumferentially ofl yeach other to eliect accurate spaced relation of the camprojections162, .162 and roller y 79a Vto each other and'to the cam surfaces 78a and roller 161.A

I claim-f 1.'The combination with a forwarding member having means to engage and hold.'-

one end of a tubularblank, a cylinder pro.- vided with gripping means to engage and h'old the end of the opposing layer of the 'l blank, means forreleasing the blanlfi'from4 the forwarding member after vthe leading end ofthe blank has been partially opened by the forwarding member and oyllnder, `tuck lingers onsaid member and cylinder respectively, Ameans for periodically actuat- .ing said fingers to engage'and release the respective opposing sides of the tube, and

stationary side foldingfmembers into which the open leading end of the blank is .advanced by the forwarding member and cyl.-

finderwhile the blankis held by said `memberand the cylinder.

ber, a 'gripper cylinder, y tuck lingers on-"said member and cylinder respectively, stationary Sidev folding members overlying said inem@ ber and cylinder and positioned to receive the open leading end of thefgliilank while the blank is being carried bysagidimember 'and cylinder, and means for actuating the/tick fingers to edect their 'engaging and releasing actions, the period of enggeineilt off. tlfiiei inst at o t e;

lingers of the cylinder'eXcee lingers'.v of the .forwarding member.

a The Combination with a forwarding roller, and a gripper' cylinder adjacent thereto`, of stationary side folding members over-v lying said'roller and cylinder, said member having inclined acting surfaces with which the open leading end of the blank contacts, *while it is being carried by said roller and cylinder. y l i,

fl. The .combination vwith a forwarding .roller, ofg'piyotally mounted Ablocks at the ends -of said roller, tuck lingers on said blocks. supports for said blocks, means for periodically moving said supports toward and from the ends yof 'the roller in a path parallel tothe axis of rotation of said roller, and means for oscillating said blocks andA their fingers Yduring the movements of theysupports.

5j The combination'. withl-a forwarding vlroller and its shaft, of sliding sleevesfon saidshaft adjacent the ends of the roller,

blocks pivoted 'on 'sa-id sleeves, tuck lingers l' on said blocks; means for periodically iiovfing the sleeves toward and from the ends of' said carriers are l'caused l ff @Yfolderinits travel e Y qj` `flap `portion down upon and throughent tleqg i, rollerand its shaft, `ofosliding sleeves on said shaft adjacentl the `ends of the roller,

" i blockspivoted onsaid sleeves, tuck lingers `onfsaid blocks, rneans for periodically moving the sleeves toward anfdfroin theends of *the roller, and springconnections between lsaidblocks andlsleeves, whereby theblocks ,and their `fingers are osrillated during the "movements of thesleeyes toward and' from 7."l`he combination `with `a,".forwarding roller'and its shafniof )pivotally mounted 'blocks at the ends of said "roller, tuck lngers on said blocks, supports for said blocks,

15,", springs toinaintain said supports normally `away romthe ends ofthe blocks, abutment devices for perodicallyfengaging the sup- `ports-to `force theni towardtheends of the f roller, adjusting means fornsaid abutanenl;`

` devices, land means for "oscillating said.

blocks and their-lingers during the movements of the"supports.v A

S.` The. combination `with a grippercylinder, of gripping lingers `at the ends thereof,- zshatt sections for said grippers slidingly e and rotatably "mounted, on said cylinder, 1lneans tending to keep the shafts normally aparty means tending `to maintain `the lin# gers normally incontact with the periphery `of the cylinder, means forperiodically mov.-

' ing the shafts toward eachother, and means for periodically raising the fingers trom fthe rperiphery 'of the cylinder. i

The combination`-with the gripper cyl' l index', of `a transverse bottom gripper Inount-- hereon, a secondtransverse bottom grip ged in spaced relation theretoxend lly mountedV on the cylinder and e latter gripper, rackiand pin- 40 ,K ,between the cylinder and, @the fr. t by circ,uriferentialeadjustV ment of the rames and cylinder relative to each` other canfbe ellected toI regulate the [space `between the transverse bottom grippers, and. means foresecuringsaid frames and cylinder in their position oadjustlmentw e l p 10. The combination with the gripper cylfinder, gripper jaws thereon.,` and means `for tucking a blank bctweensaid jaws, whereby tsaid blank is crlmsed along` the base of its trailing `portion andv such portion is upwardly deflected, fof flexible endlessl Vcarriers, means `wherebythe `:native stretches of' 'to travel adjacent.

*the same direction and curvature l folder said? carriers, and Ameans for'impelling said carriers, whereby the:

.swings the upstandrng` e aanvinken@ engen ofthe-blank:

, t der, slippen'iWe-` d` inciting` a blank with ecrire Crim means for impelling the chains whereby the therewith, n k 'drawing mechanism beyond said y mechanism, forwarding rollers beyond sind 1 cylinar wahsaga' 1; `'Ina.paper ag machine, the combina@y creased along` the base of its trailing portionand such portion is upwardly deflected, f of a transverse bottonriolding roller mountl ed to travel adjacent thereto and in the same direction and curvature as the opposing pe-f1 e ripheral surface of the cylinder, laterali.; chains carrying said roller, sprocket wheels l' for said chains, shafts for said wheels, and f said roller in itstravel'swings thenpstanding flap portion down upon and throughout the entire width and length of the blank.

1:2. The combination with the gripper cyl` inder, gripper jaws thereon, and means for .tucking a blank between said jaws, whereby said' blank is creasedalong the base of its' trailing portion and such portion is vupwardly deflected, of a transverse bottom folding roller mounted. to travel adjacent thereto and in the same direction and. cnrvature as the opposing peripheral'surface ofv the cylinder, lateral chains carrying said roller, sprocket wheels' for said chains, shafts for said wheels, means for impellingj 90 4the chainsl wherebythe said roller in its travel swings the 'npstanding flap portion down upon and throughout the entire'width l `and length. of theblanlsz, a final foldingv roller below the chains, andmcans for ro.-I tating said roller.; v e

` 15. The combination with the gripper cylinder, gripper jaws thereon, and means- ,for tucking a blank between said jaws, whereb ',sad blank is creased along theoo base o "its trai-lin .1 portion and such portion is upwardly eected, a rotary pasteapplying member adjacent thereto, a shaft t upon `which said member is mountedt sprocket wheels on saidA shaft, n. lower' shaft, sprocket wheels 'on the latter, chains" passing around the `upper and lower sprocket wheels, and a transver folding roller carf vried by said chains andadapted to be im- Vcylinderwhereby the sai roller in its travel vs'frngs 'the upstanding flap portion down upon and throughout the entire Width and length oi the blank. t

'14, The combination' of Atube-cutting' mechanism, gripping mechanism associated intermittently-acting drawin -meohanism,means on one of said-12oV forwarg rollers for temporarily enga'gvu ing and holding tho'leadingef o tl1e blaakiwkefirries fi l, 1 uw mffori rerieiallr estreme' 'cereza crible@ ymleradeeet .t Aarardnigao ers ne vices? l y gllhpne @naar the-leyes' i' tho'bla-nlt contiguous thereto, tuckgrlprs-on said'oylinde'n'coa wit ed lingersto Spread the leading 5 Pimg. t

Ion 1

Images