US812378A

US812378A - Paper-bag machine.

Info

Publication number: US812378A
Application number: US22655104A
Authority: US
Inventors: Frederick E Strasburg
Original assignee: CONTINENTAL PAPER BAG Co
Current assignee: CONTINENTAL PAPER BAG Co
Priority date: 1904-09-29
Filing date: 1904-09-29
Publication date: 1906-02-13
Anticipated expiration: 1923-02-13

Description

PATENTED PEB..13, 1906.

F. E. STRASBURG.

PAPER BAG MAGHNE. P'PmoA'rIoH FILED snm-.29, 1904.

7 SHEETS-SHEET l.

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Nw mm @Nw v QN No. 812,378. PATBNTED FEB. 13, 1906.

RRSTRASBURG.

PAPER BAG MACHINE.

APPLIOATION FILED snrmzs. 1904 7 SHEETS-SHEET Z.

In' we @i071 PATENTBD FEB. 13, 1906.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLICATION FILED sEPT.z9. 1904.

7 SHEETS-SHEET 3.

@MN h. 4 l NWN QWN. .QN NN@ PATBNTED PEB. 13, 1906.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLICATION FILED sBPT.29. 1904.

'l' SHEETS-SHEET 4.

.mwN www N N mwN QE. mwN www.. NMWI *NNI @N PATBNTED FEB. 13, 1906.

P. E.l STRASBURG. PAPERl BAG MACHINE. APPLIOATION FILED SEPT. 29. 1904.

7 SHEETS-SHEET 5.

PATBNTED FEB.= 13, 1906.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLIoATIoN FILED SEPT. 29. 1904.

No. 812,378. PATENTBD PEB.13 1906. P. E. STRASBURG.

PAPER BAG MACHINE.

APPLICATION FILED SEPT. 29. 1904.

7 SHEETS-SHEET 7.

M%% y u trating successive narran smits- KR FREDERICK STRASBURG, OF RUMFORD FALLS,

a'rnfr mica.

MAINE, ASSIGNOR TO CONTINENTAL PAPER BAG COMPANY, A CORPORATION OF MAINE. PAPER-BAG MACHINE.

Patented Feb. 13, 1906.

Application filed September 29, 1904. Serial No 226,551.

To @ZZ whom t may concern,.-

Be it known that I, FREDERICK E. STRAS- BURG, a citizen of the United States, and a resident of Rumford Falls, in the county of Oxford and State of Maine, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

This invention relates to paper-bag machines, and more directly to that class of paper-bag machines in which the end of a paper tube having an inwardlyfolded tuck in each side thereof is opened out and folded down into the well-known diamond form and in whi ch the front and rear iaps of the folded diamondv are later folded over to form the well-known square bottom of a paper bag. y

In the drawings accompanying this speciiication is illustrated a paper-bag machine embodying one form of my improvements, and wherein` Figure 1 is a side elevation thereof with the mechanism for forming the tucked paper tubing and a part of the framing broken away. Fig. 2 is a plan view of the same. Fig. 3 is a front elevation of the tube-severing mechanism, and Fig. 4 is a side elevation of the same. Fig. 5 is a front elevation of the diamond-folding mechanism and Figs. 6, 7, 8, and 9 are side elevations thereof, illussteps in the operation of said mechanism. Fig. 10 is a side elevation showing more in detail the mechanism for completingv the bag after the diamond fold has been formed. Fig. 11 is a side elevation of one of the pairs of gripping-blades provided for turning over the upper ply of the bag-blank to form the diamond fold.

The paper-bag machine in which I have in the present instance chosen to embody my improvements may comprise side frames 2 3, herein illustrated as of skeleton construction and on which the various mechanisms and parts may be suitably arranged and secured. The delivery end of some suitable tuckedpaper-tube mechanism is indicated in a general way by T, and as such mechanism is no part of my invention it will be unnecessary. to refer to it more in detail. Directly succeeding said delivery end is a pair of feedrolls, as 4. Said rolls are mounted upon shafts, as 5, supported in suitable bearings 6 74 in side frames 2 3, respectively. The bearings for the upper of said shafts 5 may be -circumferential supported in slidable boxes, as 8, and which boxes may be mounted in u pwardly-extending portions, as 24, of the respective side frames. Said boxes may be urged downwardly by means of springs, as 9, and the tension of which springs may be adjusted by means of screws, as 1 Rolls 4 may be caused to run in rolling contact by means of gears, as 11, on their respective shafts. Extending forwardly through a space formed by depressions in said feed-rolls is float 12, hav'ng the usual serrated front edge. Above said float and secured. to a cross-beam 14 by means of screws, as 15, is blade 13, also provided with the usual serrated front edge. Somewhat in advance of rolls 4 is a second pair of feed-rolls 16 17, mounted upon shafts 18 19, respectively, and which shafts may be geared together by means of gears 20 21, respectively. Shafts 18 19 may be mounted for rotation in frames 2 3. I prefer to support upper shaft 18 in slidable boxes, as 22, and which boxes are mounted in upwardly-extending portions, as 23, of the respective side frames. Said boxes, as 22, may be urged downwardly to cause rolls 16 17 to coact by means of springs, as 25, and the tension of which springs may be adjusted by means of screws, as 26.

The driving mechanismof the machine is as follows: Mounted in suitable boxes 28 29, supported on side frames 23, respectively, is main shaft 27. On the rearward end of said shaft are mounted the usual tight and loose pulleys 30 31, respectively g also several gears are mounted upon said shaft-to wit, spurgear 32, gearing through intermediate gear 33 into lower gear 11 of driving-rolls 4 and from gear 11 through large intermediate 990 into lower feed-roll gear 21 bevel-gear 35, meshing with bevel-gear 36 on intermediate shaft 37, which shaft is mounted in suitable bearings 95 96, extending inwardly from frame 3 and which transmits power to the various mechanisms at the forward part of the machine, and bevel-gear 38, meshing with bevel-gear 39 on shaft 40 for driving the severing mechanism. Power may be communicated to the machine by suitable means, such f as a hand-wheel 45 or a belt engaging pulley 30. By means of the usual shipper-fingersl 41 on reciprocating shipper-rod 410 said belt may be shifted to and from said pulley. Intermediate the two pairs of feed-rolls 4 4 and IOO 16 17, respectively, and contiguous tothe transverse crease acrossV the bag-blank. Sucserrated edges of blade 13 and float 12v is ceeding rolls 16 17 is another pair of feed-rolls mounted striker 44 for severing, inf connec-` 71 72 for delivering thesevered bag-blank tion with said blade and float, the tuckedonto-foldingfroll7 5. Upper roll 71 is geared paper tube into bag-blanks. Striker 44 and to lower roll 72 by means of gears 73 74, re- 7o its operating mechanism may be best underspectively, and is preferably urged toward stood by reference to Figs. 3 and 4, in which said roll 72 by gravity, shaft 76 of roll 71 be- 42 represents a gearbracket, secured to ing guided in. U-shaped boxes 78 79 in

side frame

2, and 43 represents a pivot-bracket, frames 2 3, respectively. Between rolls 16 1o also secured to said frame and in which lat- 17 and 71 72 a guide-table 77 is preferably 75 ter bracket at 47 arm 46 is pivoted. On shaftv supplied, fast on shaft 80, supported from 40'iny bracket 42 (driven from main. shaft 27.' side frames 2 3. A similar table 81, similarly through bevel-gears 38139) is mounted geary supported, maybe-supplied between rolls`71 48, meshing on the onesidevwith gear 4.9and 72 andfoldingfroll'7'5. on thefother side with gear 50, saidgearsalso`v Folding-roll or carrier 7 5 is fixedfor revolu- 8o being pivotally 4mounted:- in bracketv 42 on. tionson shaft 82, suitably mounted in sleevel shafts 51'K 52, respectively. Upon the forbearings84f85', projectinginwardly fromlsid'ef wardend of shaft 52, Fig. 4, is mounted'l frames 2 3, respectively. Said sleeve-bearcrank-disk 53, bearing acrank-pin. 54. OnI ings are each provided with a flange, as 91,

zo said pin is mounted@ a slidingjblock 55, hav-l and which llangesmay bewsecured to theirre- 8 5 ingl a pair of its opposite sides. suitably spectiveside framesbymeans ofy screws, as 83.

grooved: for engagement with ribs` 56' on thel Said folding-roll 75-may be driven by a gear inside of slot 57` in` arm 46'. Bymeans ofi'said 86, fixed' to its` shaft 82 and meshing with crank, arm 46may be oscilated inwardly andgear 87on shaft 89", which'shaft isalso inounte outwardlywith respect of thepath ofithebag--v ed-` for revolution in sleeve- 178 and in side 9o blank; Upon theforwardiend ofshaft 51; isy frame 3 and* carniesthereon transfer-roll' 92. mounted. another crank-disk 58, similar to i Said shaft89 has alsomountedthereon-miterdisk 53 on shaft 52. Grankfdisk 58 isprof l gear 93, meshing with.miter.gear 94 onv the vided with ahole 59-eccentricftfo the axis off] forward; end ofi shaft 37'. Gear 87Jis adjust 3o rotation of said disk, and: in` saidi hole x isfV ablyfsecured" toits. shaft 89by means` of a 95 mounted pivot 60- of groovedf block 61..'A flange or disk 97?, keyed or otherwise fixed Groove 62 in said block is. preferablyy prof to said shaft, and to which ange said gear vided withfundercut sides forslidi'nglengage-` isfheldlvby means of bolts. 98. Saidll'ange is ment with the complementarily -vfashionedl provided with. slots, as 99, for the passage off g, 5 sides-.63.of1the-shank portion 641 of striker 44, saidzbolts, andiwhich slots allow ofthe shift# roo n At65 the rearwardend of shank 64: is perfo-v. ingiofsfiange 97 and gear. 87 in-their relation-to:

ratedl for,` the reception of'pivot-pin166-, by eachv other. Folding roll or carrier 75 may.`

which pin said shank is pivotedl to the free. beprovided-1 with. onel or more| folding-beds. end: of; leven 46. Said' free-,end` ,isvpref'er-I fixedi'thereon; but in the present instance I 4o ably bifurcatediat 67 forthereceptionofisaid havechosen-toprovideoneonly,102. Mount- 105 rearward end of striker 44.` By.: thezhereined-i upon andv revolving with said folding-roll described, means:` the cutting edge 88\ of l are a. pair of oppositely-dis osed: side clipsA striker 44e may be causedto, travel: athigh 100.1011and'a front clip 105 or clamping the f s eed acrossthe pat-hl ofi the bag-blank and'. lower ply ofthe tuckedabag-blankto thepet en withdraw, so as to pass backwardly ripheral` faceor folding-bed 102 of. said*y roll'. no aroundl that,path-torepeaty theoperation, as Saidsideclipsfare of a well-known type, pivindicated bythe dotted line B', Fig; 3f'. At44'a otedi belowthe facel of. thel folding -..bed, as saidstriker is showninwdoteand-dash linesin at; 103", andl each provided at itslower end one position ofits .backw-.ardpathi with a roll, as1104, for engagementv with suit- 5o` The severing mechanism'whichl have just ablecams, as 106'. Said side clipsare-pref- 115 describedis not claimed herein, asit-,hasbeen erably closed by springs, as 107, and opened .made the-subject-matterof!azseparateapplie by the engagement of their rolls with their cation, Serial No. 240,401, filedl March 1'47 respectivecams. Front clip 105 isof'awell- 1905. known type and! is. pivoted at 108 in roll On.` studs 68 69, inreaching from the` side. 75". Saidfron-tclip has an-iinwardly-reach-k ino frames, respectively, a guide-.table 47,0 maybe ingarm 109',bearingaroll 110for engagement supported to assist the delivery of the advanc-A with fixedcam 111, whichv cam is operative ingend ofthe lbag-tube to Vrolls .1617. If1de to-open said front clip, andspring 112 is prosired, some form of slacker, (indicated in` a. videdI to closev said` clip when permitted by 6o general way by'S) for the paper tube maybe said cam 111. Said front clip preferably 12 5 provided in rolls 16 17 to assisti'nthe operacomprises.V two gripping members, ig.- tion of severing the bag-blanks. Also. saidf wherebyroom is furnished for theentrance roll'16is preferably suppliedzwitha creasertherebetween of front clip 125 on roll: 92. blade, as233', for coaction with a. creaserl Roll7 5 isalso provided withasupplementary A gfOOVe] 213234; '1111011-17fOITfOTmingthemainl front finger1'1'5', whichv is more fullyfsetforth 13o and claimed in United States Patent No. 800,337,'granted to me September 26, 1905, and to which reference may be had. I preferably arrange said finger 115 in the form of two rearwardly-reaching members, Fig. 5, of sheet metal, so as to be light and somewhat yieldable. Said members are xed at their forward ends to rock-shaft 113, mounted in sleeve 114 ofjlever 116, pivoted at 117 in roll 75. Sleeve 114 is provided with slots 118, through which the members of finger 1 15 may pass for attachment to shaft 113. One end of shaft 113 extends outwardly from sleeve 114 and carries arm 119, which arm in turn carries roll 120 for engagement with fixed cam 121 on sleeve 84. A spring 122 is effective to maintain roll 12() in contact with cam 121. Mounted on arm 116 and about midway its length is roll 123 for engagement with fixed cam 124 on sleeve 85. By means of cams 121 and 124 and the mechanism just described as operated thereby supplemental front finger 1 15 may be passed into the mouth of the bag-blank and held onto the lower ply thereof during the early part of the formation of the diamond fold to assist in the folding thereof and to prevent the tearing of the blank. During the operation of said supplemental front finger 115 front clip 105 is raised from engagement with the bag-blank by means of the high place 127 of cam 111.

The mechanism which I have provided for turning over the upper ply of the bag-blank for the formation of the diamond fold is somewhat in the nature of the mechanism employed by me for the same purpose in my copending application, filed April 26, 1904,Se rial No. 204,992, and to which reference may be had. The present means differs from that of said copending application particularly in that the present means is fast to the foldingroll and revolves round and round with it, whereas the means of said copending application is mountedfor oscillation forwardly for coaction with the folding-bed and backwardly to its initial position to repeat the operation. In the present improvement two pairs of oppositely disposed grippers 130 132 and 131 133, respectively, are suitably mounted upon trunnions 134 135, respectively. Said trunnions are mounted for oscillation in bifurcated brackets 128 129, respectively, outstanding from either side of folding-roll 75. As said grippers and their operating mechanisms are right and left duplicates of each other, the description of one will suffice for both. Trunnion 134 is provided with a head 140, having ears 136 extending forwardly therefrom. Between said ears on pin 137 the rearward end of gripper-blade 132 is pivoted. Adjacent to ears 136 in head 14() is a hole for l the reception of shank 146 of swivel-head 139.

Said swivel-head is provided with ears 138, between which on pin 147 the rearward end blade is allowed movement inwardly and outwardly with respect of the folding-bed and upwardly and downwardly with respect of gripper-blade 132. Said blades may be urged to their outward positions by springs 141 142, respectively, and blade 130 may be urged away from blade 132 by means of fiat spring 143, fast to blade 132 and pressing upon blade 130. Trunnion 134 is perforated from end to end for the passage of plunger 144, which plunger is provided at its inward end with a T-head 145 for engagement with gripperblades 130 132 and by which means said gripper-blades may be forced inwardly at proper times toward and over the foldingbed for engagement with a bag-blank thereon.

On bracket 128 are outstanding ears 148, be-

tween which, on pin 150, is pivoted arm 149. One end of said arm engages the outer end of plunger 144, and the other end carries a roll 151 for engagement withfixed cam 152, fast on sleeve 84. By means ofsaid cam as roll 75 revolves arm 149 may be rocked on its pivot and plunger 144 thrust inwardly for engagement with gripper-fingers 130 132. Roll 151 is urged toward cam 152 by means of springs 141 142, which pull backwardly on blades 13() 132, respectively, and which blades in turn impinge upon T-head 145 of plunger 144 and which plunger contacts at its outer end with the upper member of arm 149.

For forcing gripper-blade 130 downwardly toward gripper-blade 132 ,cam 162 is provided. Said cam is fixed to head 140 of trunnion 134 by means of a screw or screws 163 and is provided with a suitable inclined working face 164, which when gripper-blade 130 is thrustinwardly by T-head 145 of plunger 144 forces said blade downwardly toward opposite blade 132. On trunnion 134 and between ears 252 153 of bracket 128 is fixed gear 154 for engagement with segment 155 for rotating said trunnion and gripper-fingers 130 132, carried thereon. Said segment 155 is fastvon shaft 156 between ears 157 158 on bracket 128. Said shaft extends inwardly beyond ear 158 and has fast thereon arm 159, bearing roll 160 for engagement with fixed cam 161 on sleeve 84 and by which means segment 155 may be oscillated at proper times to rotate gear 154 and trunnion 134, and thus turn over gripper-fingers 130 132 from the position shown, for instance, in Fig. 6 to that shown, for instance, in Fig. 9. Gripper-fingers 131 133 on the opposite side of folding-roll 75 are actuated in unison with gripper-fingers 13() 132 by mechanism substantially alike in all respects to that just described in connection with said gripper-fingers 130 132.

On shaft 165, fixed in frames 2 3 somewhat in advance of folding-roll 75, are supported two oppositely disposed rearwardly reaching stationary brea ers and ironers 166 167.

6 5 of gripper-blade 130 is pivoted, whereby said 1 In the form illustrated said breakers and IOC IIO

ironers each-compriseanarm,.as168, having' at one end. ay clamp-hub, as 169, forfengagef. ment, with shaft: 1,65 and at; the-other end a,

blade, as 170, whichis the breaker andironer v proper. The faces of. these breakers and@ ironers :have inwardlysinclined approximately helicalfconformations commencingv atv a posi;- tionV relatively remote from` the peripheryl of roll, 7 5 ,as17 2 and at; which portionthereofg saidfaees -have their maximum inclination to, said'roll periphery, and saidffacescontinue-to avposition ofv close proximity to-saidperiphe ery, as 173, and. at this iinal position areisub.- stantially parallel thereto. I5 Mountedf on shaft.; 174 in sleeves,. as; 176,. inwardly reaching'from;sideframes2 andi below, diamond-folding rolli75,fis flap-folding rol1 175. Betweenasaidirolls 75 andi175 for rolling coaetionwith: both; thereof is mount-l edl transfergrollA 92, Said transfenrollis, ixedi on: shaft; 89fforyrevolution therewith saidshaft; turningfin1 frame, 3; and in sleeve 1=7,8i'nwardly reaching from name2; Said. transfenroll isprovided1with; aopair of op;- positelydisposedv side clips, as 179. Gli'p-v 17.9 isfpivotedk in saidfrolliat; 1801and is oper.-` atedj directly :from: fixed cam 181 oni sleeve, 178, and the corresponding clip issimilarly4 pivoted on; the other;v side of.v roll; 92- and is; operatedrom clip; 1;7 9 vbymeansyofv link; 2.3 5 .K Said transfererollis also provided with a

Jfront j clip

1,25, pivoted at 182 therein,andwhich clip' has an inwardly-extending arm, 183, bearing a! roll 184 for engagement with fixed, cam 185 on sleeve 1.78 in the usual manner.l Said! front clip 125 is preferably comparar tively narrow-andso arranged as to` pass between the'members ofi'rontclip 105 of rolll75.- without interfering therewith.,4

with a pluralityl ofolding-beds` Inithe pres,-` ent instancetwo are shown, 186 .187, eachabeing/providedwiththe usualasideA clips,l as 188 and front clip, as 190.. Said side clips; are pivotally mounted, as at 191, and are pro` videdwit'h'rolls, as 192,for engagement with, the usual cams, as 193. The front: clips, as- 190, are pivotedf at 194 and have inwardlyf extending arms, as 196, carryingv rolls, as 197 Jfor engagement with thensuaccam, 198.

with segment223 onshaft 2,03, whereby blade;lr

Flapffoldingfrollr1'75 is preferablyA provided Figs. 1 and 8.

The `means If have providedforiolding the.. rean and: front flaps oi'fthe ,diamondi include, first, a,rearrflapsfolding mechanismicomprisev ing a Apain-ofi oppositely.-disposed-` rotany Vfolds, ing-blades, as` 199, andwhich arepmountedf withtheir; operatingfmeehanismioncbnaekets,. as f201 rearwardly, extendingfromzthesleeves, as, 176 5 in` which shaft `1.7.41 has its bearings; Said rear-flapifolders are fullydescribedaand.v claimed; in the copending application ofl Smith, ledv..lune-28,.1904, Serial; NLO; 214,563', t andato which-reference maybe had Assaidiv mechanism forms no E parte, of: the present ,imeprovements, further description. isv deemed.; unnecessary. Foryfoldingrthefront'flapsthef usualioscillatinggblade202, guidef204, squeeze ingrrolls205 2 06, and deliveny+rollsa207 208;- arelpre'vded.A

Flapfoldingrolh 1-,755'` and its.: coperati,vezl and succeeding mechanism are drivenias fol-- lows: Fixedaon one -endlofzshaft 1,74,tozwhiehf.1 said roll 1.75.is xed,.,is flangei209,providedl with'y slots; as 210, through., which; bolts,\ as;Y 2 11, pass fon engagement withthe -flangeelike hub of; gear 215, ,Wherebyfsaidlange 209, and'` ear;2 15` are adj ustablysecuredto .each other: aid gear meshes withandis-drivemby. gear; 87" on shaft; Y89,. and: inits turni meshes ,with and` drives gear-214 on vpast'er-,segment shaft.v 218 withgrear-` lapffoldelffgear: 216.011; shaft.- 212 in bracket 201i and withgear V217 onishaftg. 218;. Shaft 218. carries; cam 21.9: fon engagementwith roll 220: on:

arme

22,1, which; arm.` carries segmentfr-y gear 222l ferl engagement OO 202, maybe toscillated tol fold-andf deliver the'. leading enely of! the bagblankinto the bite of; rolls-2,05 2061` Rfoll-208 onfshaft1224rmay be driven; from gear2 1 7, bygear-2 2.6 -onsaidshaft 224, andirollg206on shaftg225 may be-idriven;y fromfgear. 226l by meanso gearf227= on said,l shaft; through. intermediate 22,87.l Rollsy 205; andf207 may bezdriven byfiriction f'romrolls, 206 andl 208, respectively;`

The operation of, my improved machine is:` as follows Suitable tucked:papier@tubingl is: suppliedlby tube ymechanism T; oriromfotherf convenient. source te rolls 4: andied forward past,` the serratededges of' blade 13v androat; 12 and, Where the projecting; end; ofi said; tubing is-tornof byhand against. said serratededges. At. this positiolxoi the leadingl end of thev bag-tubey edge 88 oiy striker-44A should` have f just passed; said serrated edges, The` machine may now: be started andthe tucked tubingis fed. forward by-rolls 4. over table-7,0 intovthebite of rollsl 16 17. Duringths time striker 44hasfpassed's upwardlyin its pathLP, Fig, 3, then down;- wardly-and retractively in said path, andy soonward thereinuntil a suitablelength oiv the bag-tube for a bag-blank has been; fedA forward of the serrated edges of blade 13 andl l ioat 12, at which time striker 44-willl have reached al position closelyv approaching that I IVO shown in Fig. 3 and will be traveling upward at a high rate of speed. It will immediately thereafter strike the bag-tube just in advance of said serrated knife-edges, and said tube, being held in the grip of

rolls

4 and 16 17, respectively, will have a portion severed therefrom. About this time creasers 233 and 234 will coact to form the main transverse crease in the bag-blank, and rolls 16 17 are preferably so situated in relation to the striker that said creasers 233 234 therein, respectively, will engage the bag-tube at the time of severance thereof, thereby adding to the gripping efficiency of said rolls. The severed bag blank continues its forward movement over table 77, between rolls 71 72, and over table 81 onto folding-bed 102 of roll 75. The bag-blank is delivered onto said folding-bed with the lower ply of the leading end thereof in position to be clamped to said folding-bed by front clip 105, and which clip immediately closes thereon. Directly thereafter side clips 100 101 enter and grip to said folding-bed the respective lower plies of the side tucks of the blank, Fig. 6. Closely following this operation the forward movement of roll about its axis 84 causes roll 151 to ride up onto the high part of cam 152, whereby arm 149 is rotated on its pivot 150, plunger 144 is thrust inwardly, and fingers 130 132 are thereby swung inwardly on their respective pivots, the former above and the latter below the upper ply of the adjacent side tuck of the bag-blank. At the same time the shank of upper finger 130 contacts with the inclined under face 164 of cam 162, and said finger is thereby forced downwardly toward finger 132 and said upper ply of the bag-blank is gripped therebetween. Synchronously with this operation gripper-fingers 131 133 on the opposite side of the foldingbed, actuated by means similar to those which actuate fingers 130 132, engage and grip the upper ply of the side tuck adjacent to them.

The forward movement of the bag-blank on the curved face of the folding-bed tends to open the mouth of said blank, whereby an entrance is afforded for supplemental front finger 115, Fig. 6. Roll 123 on arm 116 thereupon travels in its cam 124 toward axis 82, and said supplemental front finger on the free end of said arm moves toward and into said mouth of the bag-blank. Also roll 120 travels inwardly on cam 121 toward axis 82, and said finger 115 is thereby lowered onto the inside face of the lower ply of the bagblank, clamping said blank rearwardly of front clip 105 to the folding-bed, Fig. 7. Immediately thereafter roll 110 of front-clip arm 109 rides up onto high part 127 of cam 1 11, and said front clip is lifted from the bagblank, thus relieving the strain from the forward end of the blank during the folding of the diamond, Fig. 8.

During the passing into engagement of supplemental front finger 1 15 and the temporary release of the bag-blank by front clip 105 roll 160 on arm 159 of segment 155 is mounting rise 229 of cam 161, whereby said segment rotates, through gear 154 thereon, trunnion 134 and gripper fingers 130 132, which fingers have the up er ply of one of the side tucks of the bag bfank in their grasp. By similar means gripper-fingers 131 133 are rotated with their trunnion 135, and the upper ply of the bag-blank is lifted and turned backwardly about the center of trunnions 134 135 as an axis from the position of Fig. 6 through that of Fig. 7 and to that of Fig. 8. The sides of the partly-opened bag-mouth in their travel with folding-bed 102 about its axis 82 now impinge against the inclined portions, as 172, of the faces of breakers and ironers 166 167, whereby said sides are turned inwardly and downwardly in the formation of the diamond fold. Roll 75 continuing its onward and clockwise rotation, and fingers 130 132 and 131 133 continuing their backward and anticlockwise rotations, the upper ply of the bagblank is folded back onto itself, the front clip resumes its grip on the forward end of the lower ply of the bag-blank, the supplemental front finger is withdrawn, and the diamondfolded blank passes over the less-inclined parts of the breakers and ironers and onto those parts thereof, as 173, which are substantially parallel to the folding-bed. The diamondfolded blank is thus ironed down against the periphery of roll 75, Fig. 9.

Rolls

151 and 230 then run ofl the ends of their respective cams 152 231, whereby gripper-fingers- 130 132 and 131 133, respectively, are withdrawn from engagement with the bag-blank. Roll 75 continuing its revolution, the forward end of the diamond-folded blank is delivered into the grip of front clip 125 on transfer-roll 92, and thereupon front finger 105 of roll 75 releases its hold thereon, Fig. 10. Side clips 100 101 on roll 75 then release their hold on the bag-blank and side clips, as 179, of roll 92 clamp each side, respectively, of said blank to the periphery of said roll. Roll 75 continuing its clockwise movement, trunnions 134 135 and their respective gripper-fingers are rotated in a clockwise direction to their initial positions ready to repeat their operation. Transfer-roll 92 continues its forward and anti-clockwise rotation and presents the diamond-folded blank to one of the folding-beds, as 187, of roll 175, with the leading end of said blanks in position to be gripped by front clip 195, which clip thereupon closes, and front clip 125 of transfer-roll 92 releases its hold on said blank. Rolls 92 175 continue their respective onward movements, and just before side clips, as 179, of said roll 92 reach the position of contact of said rolls said side clips open, and side clips, as 189, of folding-bed 187 on roll 175 directly after passing said position of contact close, thereby gripping the IOO IIO

IZO

, gripped to folding-bed., as 187, of roll- 175.now

passes onward therewith under pasting and creasing segment 200, front clip, as 195, refv leasesI its grip, paste is applied, and theblank creased forfthe folding of the rear and fronte` flaps thereof. The bag-blank then passes. onward under rear flap. folders, as 199, by which the rear flap is turned overV forwardly and held down until blade 202 engages saidl bag-blank, which it does forthwith at thebase of the front flap thereof. Side clips., as 189,`

then release their grip, andk said. blade 202de-.- 3

livers they bag-blank onto guide-table204 and into the bite of rol-ls 205 206, by which rolls the end flaps are squeezed downonto the bag-` bottom and the then completedbag-conveyed onward and downward into. the bitezof delivery-rolls 207 208, from which rolls thefinished bag may be delivered tosuitable dryingmeans, orotherwise disposed of.

I claim- 1. The combination of a revoluble carrier, a foldingbed fixed thereon, meansmounted coaxial withy the folding-bed and revolving therewith to open out the forward endy lof a tucked-.paper tubey and fold `the same down, into a diamond form, an oscillatable lever pivotally mountedr in the revoluble carrier, a front finger 115` mounted inthe free end'of the .oscillatable lever for entering the mouth ofthe bag-blank to hold the lower ply-thereof" to the folding-bed during the formation of the diamond fold, all combined and operatingto.-V gethersubstantially as described-` 2. The. combination of arevolublefoldingY bed having side clips 100, 101 thereon, a pair of oppositelydisposed: trunnions.l 13.4.,- .1135 mounted for oscillation about their own` axes. respectively, and for revolution withthefolde; ing-bed', a pair of gripper-fingers carried by each trunnlon, said. fingersbeinglvmounted in.

'their'.Y respective tr'ruiriionsr for' vibration wardly and outwardlyl with respect. to the folding-bed and oneof each pair of said lingers being mounted for vibration toward and awayv from the other finger of its respective pair, all combined and operating together substantially as described.

3', The combination' of a revoluble foldingbed 102, a transfer-roll 92v and a revoluble folding-bed 187 eachhavingside clips thereon; means coasting withv 4the first foldingfbed -to open out and fold downintoa diamond' forml the forward end of a tuckedpaper tube, and means coacting.- with the second folding-bed. to fold the rear and front flapsf of the dia. mond foldtoforma bag-bottom, all com-y bindeand operating together substantially as described.

4. The combination of arevoluble foldingbed-1 1.02, a transfer-roll 92 anda revoluble folding-:bed 187 each having a pair of side clipsand a front clip thereon; means coacting withL the first folding-bed for forming a difa-v mond "fold on the. forward end of a tuckedpaper tube, and"l means coacting. with the second- .folding-bedA for folding the iaps of the.

diamond fold; to-,form a bag-bottom, all combined. and operating togetherv substantially as described'.

5. The` combination of a revolublefolding- .bed 102, a .transfer-roll. 92 and a revoluble folding-bed 187 each` having means for hold.. ingv a bag-blank thereon; means coacting withI the first folding-bed to. open out and fold down into a diamond' form the forward` end of'a bag-blank and: means coacting with the.. second1 folding-bed toifold therear and `frontflaps. ofthe diamond fold, all combined and', operating together substantially as described.

Signed at Rumfordz Falls, in the county of `Oxford'andl State of Maine, this 241thy day of September, 1904, in thetpresence-of: twosubscribing. witnesses.`

FREDERICK STRASBURG- Witnesses-z THEO. HENDLEY, HARoLD SMITHWIGK,