US983825A - Paper-bag machine. - Google Patents

Description

G. S. JACKSON. PAPERBAG MACHINE.

APPLICATION FILED ULY 1, 1905.

Patented Feb. "2, 1911.

5 SHEETSr-SHEET 1.

G. S.- JACKSON. PAPER BAG 11110111113. APlfLIC'IiION FILED JULY 1, 1907.

Pat ented F917, 1911.

'5 SHEETS-SEEET s. v

- 0. s. JACKSON.

I PAPER BAG MACHINE A'PPLIOATION- FILED JULY 1,1907,

Patented Feb17, 1911.

5 SHEETS-SHEET 4.

li\l 11 1 1 1 k1 11 {1 1 1 1 .1 1 If cfis. JACKSON. PAPER BAG MACHINE. A.PBL-I0-ATION EILED JULY 1, 1907.

983,825. v PatntifFeb.7,l9ll.

v JwG/ZZZ P UNITED STATES- PATENT CHARLES-S. JACKSON, or FRANKLIN, OHIO, Assieuon 'ro'rnn has i commmr, or mnnmrown, OHIO, .A oonronarron promo.

I To all uifioin it may concern: I

Be itknown that I, CHARLES S. J AoKs'oN, a citizen of, the United States, residing at Franklin, in the county of lVarren and S tate of Ohio, have invented a certain new and useful Improvement in Paper-Bag Machines, of which the following is adescription, reference being had to theaccompany- 'ing drawings, forming part of this specification. p

My invention relates to machines for forming what are known as square satchel- :bottomed bags, sometimes called self-openin square or S. O. S. bags, and it has for its ob ect the simplification and improvement of theimechanism employed in such machines for forming the diamond-fold upon the bag blanks in the operation of forming -the bottoms of the bags.

In thepractical embodiment which I have made of my invention '1 haveapplied it to aper. bag machines constructed under and in substantial accordance with Letters Patent ofthe United States No. 7 36,673 granted August 18, 1903, to Phineas L. Bartholomew,'and I have so: illustratedit in the accompanying drawings; but my improvement is ap licable to other-paper bag machines of .the c ass referred to.

In the accompanyingdrawings, Figure 1 is a vertical longitudinal section of a portion of apaper bag machine embodying my invention, Fig. 2 an outline or diagrammatic view, in perspective, of the three up per (pairs of rolls shown'in Fig. 1, the left han pair being-the diamond-forming rolls;

.Figs. 3, 4, 5 and 6 perspective views of said diamond-forming rolls and their cooperating devices, showing them in the positions" which they successively occupy in the formation of the diamond fold upon the bottom of the bag blank;-Fig. 7 a top plan view of the lower diamond-forming roll; Fig. 8 a.

longitudinal sectional view of said roll,'ex-

posing the parts within it; Fig. 9 a cross section of said roll upon the dotted line 9-9 the several views.

Specification of Letters Patent.

- Application filed. July 1, 1907. Serial No. 381,629. 1

on forward between the rolls F PAPER-BAG MACHIN The bellow s-foldedat". iii-ri Yakima which the bags are'formed-,,is f 'lded and pasted by the usual or'anysuitable'mecha? nism at the' right of the portion of the ma clune shown in Figs. 1 and '2, and fed forp ward between the pairs of rolls'there shown. The two rear or right-handpairs of rolls B B and C C are feed rolls serving to' advancethe bagto the diamond-formingrrolls D D, and they .are also provided-with cutters and coiiperating recesses by means of which (in connection .wlth euttingrolls at theright or in rear of them, but notshown) the bagtube is cut transversely intoseparate bag blanks, the successive blanks being on- 'tirely separated from each otherwith the exceptlon of a narrow connecting tangas shown in Fig. 2, where theirearend of one blank A is shown connected. by such' tan'g to the front end of the succeeding blank upon which the diamond. ,foldljis .being formed.

The upper. diamond forriiing Dis provided near its middle with a pair of projecting points or pinsaa'which are1adapted to puncture the middleportion of the end of the upper ply of the bag-tubeA, asjthe latter passes betweentheirolls D, D, and to .carry such upper ply o f the' bag tube: forward and upward around .the face. of the roll D, as shown in Figs. 2 and 3. 1?he middle portion of the lower 1y of the bag tube is carried forward and I ownward over the face of the lower. roll D b itsconnection with the preceding bag blan A which latter is drawn forward and, downward, from the diamond forming-rolls, by the feed rolls E e E c, Fig. 1, whence the, ba blanks pass The roll E is provided midway of its length with a short cutting blade which cooperates with, a

- recess in the roll E to sever theconn'ecting tangs of the bag blanks as thelatter pass be-- tween the rolls, and thus to finally and'completely separate the bags.

The carrying of the upper 'plyof'the bag blank upward and forward'around .theroll D and the carrying of .the 'lowe ply of'the blank forward and downwarji around the roll D in the manner ,and by'the means explained, serves to open out tliehnouth 'of the bag blanlqpreparatopy to the forming of the diamond fold thereongas shown; 111' Fig. 2. The roll D is provided with ai pair Figs.- 7 aud8, which grippers, enterbetween the-"bellows folds of'the bag blank asthe latter passessbetween the rolls D D and grip. the lower-ply of the blanklto the face -.i,) f.the' roll'D, as shownin Fig. .2. These ,1 pers serve to define the lower corner as s'of'the diamond fold, and to carryv such iiirnersforwa'rd and downward as the roll D turns." The upper corner folds of the diamond fold are formed bya pair of arms ItI H-ha'nn outwardly bent rear ends, as

"shown in Fig, 2, and those forward ends are secured-to vertical rock shafts .I'I, Figs.

- -3 4 5, a, 10 nd 11, mounted and oper in the manner hereafter described. At

the proper point in the-opening out of the mouth of tie bag blank the rear ends of these arms H H are swung outward and up- 'ward and their laterally bent ends engage --the opposite sides of the upper ply of the bag blank at points corresponding to the engagement of .the' grippers G'G with-the opposite side'sof the lower ply of the blank, an the two instrumentaliticscooperate to straighten out the bellows folds of the opposite" sides of the blank and to form and jdefine the u For the purpose of dls'engaglng the upper per and lower corners of the ldia'm'ondfol ply of the blank "fromlthe plus a a of the .'upper roll 'D I rovide a curved plate J,

6, secured to and depending from a rock shaft K suitably mounted in bearings upon the under side of the cross rod L of the framework of the machine; A

ooiledspring Me'onneeted to an arm N see cured to and depending from the right hand end of the rockshaft K tends to turn the 'latter in a direction to fyieldingly press the as said pins carry the upper ply of the bag lower end -ofthe curved late J against the forward face of the will), The, plate J'is of such widthas to permit it to pass betweenthe two pins a a upon the roll I), and

blank. upward and forward on the face of said roll, the lowerend of the late J will pass between said pins and behind the bagblank, as shown in Fig. 3, anddisengage the blank from the pins. For the purpose of supporting the upper ply of the blank, after .such disengagement of it from the pins (1 a,

I provide a second curved plate J secured at its upper rear end to the rock shaft K, and bowed outwardly at-its, middle, away from theplate J, and having its lower end bent inwardly toward the lower end of the finger J, so that when the bag blank is disengaged from the pins (1 (1 upon the roll D 'itwill be caught and supported by the lower rearwardly bent end of the plate J, as shown in Figs. 4 and 5. The roll D is provided with. a creasing blade P extending-its full length gfiijglifemoperating. with a corresponding groove P m the; roll 1), Figs 1 and 7, to form the for the purp swinging the lower end. of the plate orward, away from the roll D,'so as to permit the passage oftheereasing blade Pbehind it, asthe latter'moves from the position of Fig. 5 to'that of Fig. 6,- I provide'a earn 0 upon the spindle of the roll 'D, which cam cod Jerates with an anti-' friction roller carried. 'y the lower endof the arm N toswin the,latter -and-the lower end of the plate forward at the -proper time to permit the creasing blade P to pass behind the plate J, Figs' 1, 3, 4, 5 and (3.-

The lower rollgD is longer than the upper roll D, and its middle portion, corresponding in length to the upper roll D and to the :widtli ofthe. bag blank, is of the same diam-- eter as the. upper roll- D, wliileits end -portions are, of slightly larger diameter. as clearly-shown in Figs. 7 and- 8. The bag, blank passes between the two rolls in the lower roll and is not gripped by theb'odieis 'of the roll. I 7

. In rear of the longitudinal line ,of the groo'vel the roll 'D is provided with a pair of reciprocating plates or fingers Q, Q, Figs. '1, 7 and 8.- These plates or fingers are sev cured at their outer ends to the ends of arms or posts R'R, whichlatter are fastened at their inner ends-to sleeves or hubs S S loosely mounted upon the spindle Tot the roll I) and projeetin a radially outward from said sleeves orhn s through diagonal -cam slots U U in the shell of the roll D}, Figs. '7 and Thespindle of the roll I) is fixed, and tie .roll turns uponit, and the spindle has fast upon it, immediately within ,the ends of the roll, a pair ofjcams V V. Goiled springs V; W surrounding the spinupon the arfns R R to bear. against the faces circumferential recess thus formed in the die '1 bear against the innerrends' of the they are carried around withsaid roll in the revolutions of the latter, their hubs S S Tfi; and, in-

turning upon the fixed spindle as nuchasthe camsV. V are in Xed pos1- hea the anti-friction rollers Xv-X of v witzhjthe .resultthat the fingers Q cams V' during the forward revolutio'n of .the roll I), the hubs S S which carry the. arms R R will be-forced inward along the spindle T, toward the middle of the roll D o W111 be fmovtid diagonally inward and forward from The adparts are of the dotted lines.

justinent and cooperation of the such that after the main transverse crease I I has been formed in the bag-blank by the creasing blade P carriedby the upper roll D and the groove P the lower roll D and as the fingers Q diametrically between the axes of the rolls D- with two short creasing that of the dotted D D the rollers will contact fingers Q. Q will ward upon the face of the roll D from the position of the solid lines in Fig. 7 tothat 'of the dotted lines in said figure, as the rollers X X ride over the faces of the cams -V V. Inasmuch as the end portions of the roll D are of larger diameter than its mid dle portion, and inasmuch as the bag blank travels in the circumferential recess of such reduced middle portion, the fingers Q Q, at their inward and forward movement from the position of the solid lines in Fig. 7 to lines, pass over or above both plies of the bag blank, and'while serving to hold the latter to the roll D in the forward and downward movement of the fingers, leave it in loosely collapsed condition, instead of gripping it tightly to the roll. I provide the opposite ends of theroll blades P in rear of the blade P, which serve to hold the bag blank down to theroll D at the initial inward movement of the fingers Q Q, and thereby insure the passage of the latter over the top of both plies of the blank.

The fingers Q Q are moved gradually inward and forward over the top of the bag X X carried by the arms with the cams V, V, and the blank, by the action of'the cams V V and the revolution of the roll, as the fingers are carried forward from thediametrical line of the two rolls to approximately the horizontal plane of the axis of the lower roll, by which time, or shortly before reaching such position, they have been moved inward and forward to their limit of movement, and the lower forward edges of the fingers reach -a position approximately coincident with the rear edge of the groove P in the roll D (dotted lines Fig. 7) and engage the bagblank at r the line of its main transverse crease. Shortly after the fingers Q Q have reached this position, and thus engaged the bag blank, the rollers X X clear the rear ends of the cams V V and the springs IV W thereupon throw the fingersQ Q outward and backward to normal position again. The movement of the fingers Q, Q-is sub- R contact with the faces of the I earlier Q are brought to-position be forced inward and for Their first engagement with the bag is at apoint. more remote from its mouth than that which the fingers occupy when the opening operation is being completed. Therefore the bag may be very readily spread apart at the stages of the opening movement and the fingers reach their ultimate-position by a sliding or smoothing movement face of the bag without creases.

The kicker-arms H H, by. which the upper corners of the diamond fold are defined and formed, are operated by the means more which lays it perfectly flat particularly illustrated. in Figs. 1, 10 and 11.

he arms are secured at their front ends in hubs clamped uponthe upper ends of the vertical rock shafts I I heretofore referred tod These shafts I I are hollow or tubular an which are secured at their lower ends in hubs I I fast upon a rock shaft I journaled at its opposite ends in brackets Z upon the framework at opposite sides of the machine, Fig. 11. Projecting rearwardly and outwardly from the lower ends of the tubular shafts I I, and in the present instance formed integral therewith, Figs. lO and 11, is a pair of arms I provided with beveled or-inclined rear ends over the sur-' i which bear against fit and turn upon rods or posts I 1 pins J J carried by and pro ecting upwardlyfrom a pair of 'arms'J J 3 which are pivoted at their forward ends to a pair of hubs J J 4 loosely surrounding the rock shaft I 'and'bolted in fixed position to the framework of the machine'at J -J Fig. 11. Springs J J, connected to the arms I I near their rear ends, exert an outward pull upon said arms and rear ends in engagement with the pins J 2 J 2 of the arms J 3 J The latter carry at their rear ends a pair of anti-friction rollers J J which bear against the of cams J J fast upon the spindle E of the roll E, each cam having a recess formed in it with an. abrupt rear wall and an inclined front wall, as shown in Fig. 10. Under this construction and arrangement of the parts, when the cams J turn forward from the position shown in Fig. 10 the rear ends-of the arms J J swing outward, and the springs J J 6 will swing the ,rear ends of the arms I I out: ward with them, thereby rocking the tubular shafts ends of the kicker-arms H H carried by the upper ends of said shafts. When the abrupt rear walls in the recesses'of the cams J 8 J contact with the rollers J J the parts will be quickly swung inward again to normal position. 5 g

As before stated, the hubs I P. which.

innerfaces of a pair will be permitted to i I I and swinging outward the rear 1.5 ga-genientwith the cam K carry the vertical rods I I and tubular: I rock shafts I I and kicker arms cured upon the horizontal rock shaft 1. Secured to, this rock shaft near its right. 5 hand end, Figs. and 11, is the rear end of a forwardly 'proje ting arm K which carries upon its side, ear its forward end, an anti-friction roller K,- which travels upon theiperiphery' of a cam K fast upon the'end 1 of the roll F or 'upon the spindle thereof,- as'indicated by the dotted lines in Fig. 1. -A spring K connected to the frontend of the arm K exerts a downward "pull' upon the latter and-maintains the roller K in en- The adjust? ment of the parts is .such that as. the cams J 8' J 8 move forwardfrom the position shown ,in- Fig. '10 (thereby permitting the kickerarms H H to. be'swung outward bythe ac- .20 tion .of tlie'sprin'gsjJ J") the depression in :is carried under theand arrangement of the part iasl'th-e w r 'rply of; the bag blank is carried downward and forward uponthe-face of the lower roll D by the side grippers G G the cooperation of the curved plate or finger 'J and the. 40 kicker-armsI-I H with theupp'er ply of the blank, and the action ofthe fingersQ, Q

upon the body or both. plies. of theiblank" p in rearof its main transverse crease, causes the blank to assume the successive positions land shli-pes indicated in Figs. l, 5 and Atfthis 'point in the operation the diamond fold has been formedupon the-end of the bag blank and the latter has beenbrought to.

.. :-an approximately flat or verticalposition, 59 "whereupon the usual wing folders'or presser.

plates are swung-inward and press the flatten'eddiam'ond fold i'agamst the ,face of the lower roll D as the bag'blank is drawn on downward by the rolls F e e E Fig. 1 The I wing folders'Y Y-are operated by'acam Y carried by theroll C, and'connections Z therefron'i shown in said figure'but not necessary; .to be. described, inasmuch as such wingfolders are common in machines of this 0 character. The final folding and pasting of the bottoms of the bags,- after they have. passed the rolls E E, may be accomplished by the;'u sual or any .suitable means and forms no part of my present invention. The fingers QQ, operating in the manner H, are secharacter have a'lsowith any slde grippers upon the upper tholomew short creasing blades 1) at roll. Th'eblocks G G and Gt-G'. are prog "thereby force the-free ends of the jaws or described, are, I believe, an entirely novel feature in machines of this. character, and. their employment enables. .me to dispense with the cumbersome reciprocating tuckerplates Wlth which some machines of this before been provided, and

roll D, such, for instance, as were necessary and employ'edin the machine of the Barpatent heretofore 1 referred. to.

I provide the-roll B, Fig. '1, with two its opposite ends, and the roll B with two' coincident grooves 7), for the purpose of creasing the bag blank atv the lines ofitsi opposite bottom folds.

These creases serve to break the paper along.- the lines between the lower corner folds of the bag bottom, 'orrned,by the side grippers G G, and the upper corner-folds,formed by the kicker-arms H, and. facilitate the opening out of the bottom ofthe bag blank into the diamond fold by these instrumentalities,

The particular-construction of the side grippers G G of the lower-roll D forms no partof my present invention, and 'theymay be of any suitable construction, such, for instance, as that illustrated and described'in the Bartholomew patent, As shown in Fig. 8, they consist in the present instance. of re-' ciprocating j aws- G carried by blocks G G and playing and guided slots in-tlieshell ofqthe roll, Fig. 7. The blocks GT'G are fast upon rods Gr G, whose inner ends have secured to them,bloclrs'Gr G which 'carry anti-friction rollers G G which-e0:-

operate with a' double faced cam G carried bya hub Gr? fast upon the spindle T of the vided with flanges which fit under guide strips G "G Fig. 9, and serve to guide the arts in ,their inward and outward move-- ments lon itudinally of the rollQ Springpressed .rods G bearing against thejaws G G -pressthe latter inward. and cooperate with t'he cams G G in givingthe'jawsG G their nward and outward. movements.

" The gripping jaws of the gri'ppersG G cooperate-with the--gripping aws or fingers-G G, which latter are provided with-beveled ends adapted te -contact with the beveled inner edges of the- 'grippers G G when the latter are vforced inward by their springs, to

outward into contact with fingers G". G

of the the inner faces of the igripping'jaws "grippers: G G .to grip the lower plies :of the bellows folded blank between them, in very much the same manner'as the-corresponding partsoperate in the machine of the-Bare tholomew patent before 7 mentioned. The adjustment-and cooperation of the parts are such that the grippers G T are forced inward, toward the middle of the roll, to the lower plies of the bag blank, lwhe revolution of thelatter to force sald arms gripg rs are approximately at the top of the ter, and they to approximately the loosely mounted at ing-inwardly toward roll 1n the forward revolution of the latcontinue to grip the lower plies of the blank-t0 said roll until the latter has turned forwardapproximately a quarter of a revolution, to the position shown in Fig. 1, at which point the cams G G force the grippers G G outward and maintain the-1n in outward position until, in the further revolution of the roll D they are again brought top of the roll. 7 Having thus ,fully described my invention, I claim:

1. In a paper bag machine ofthe character described, the combination, with the lower diamondforming roll mounted to turnupon a fixed" spindle, of a pair of arms said spindle within the roll outward through cam slots or openings in the shell of the roll, plates or fingers secured to the outer ends of said arms and projectthe middle line of the roll, a pair.of cams secured upon the fixed spindle within-the roll and operating in the and projecting inward toward the middle of the roll, and springs operating to yieldingly maintain said arms in and return them to their outer 2. In a aper bag machine of the character 'descri ed, the combination, with the lower diamond-forming roll mounted to turn upon' a relatively fixed spindle, of a.

pair of arms loosely mounted at their inner ends upon said spindle within the roll and projecting outward through cam slots in the I "shell ofthe roll, said slots extending for- Wardly and inwardly toward the middle line of said roll, plates or fingers secured to'the outer end of said arms and projecting inwardly toward the'middle of the roll, a pair of cams secured to the fixed spindle within the roll and coiiperating with said, arms,

and springs operating to press said arms in a" direction opposite to that :in which they respect to.the axis of'the roll whereby theare moved by engagement with the cams.

3. In a paper bag machine of the character described, the combination with the lower diamond forming-roll, of a pair of plates or fingers carried by said roll, each plate or finger having a working edge substantially parallel to the axis of the roll, means for advancing bodily on the face of the roll while preserving the direction of the working edge with fingers will first engage the blank and then carry forward the line of engagement.

4. In a paper bag machine of the character described, the combination with the lower diamond forming-roll, of a pair of plates or fingers carried by said roll, means for advancing them bodily forward and inward to first engage the blank and then their inner ends upon said plates or fingers carry forward the line of engagement while preserving the direction of the working edge of each finger. j I 5. In a paper bag machine of the character described, the combination with the lower diamond forming roll, ofa pair of plates or fingers carried thereby, means for advancing said plates or fingers in a dIIGC- tion inclined to the edge of the roll, while preserving the direction of the working edge thereof. a 6. In a paper bag machine of the character described, the combination, with the lower diamond-forming ,roll D mounted upon the fixed spindle T, the sleeves or hubs S S loosely mounted upon said spindle within the roll, the arms R R carried by said sleeves and projecting outward through the diagonal slots U U in the shellof the roll, the fingers Q- Q, secured to the outer ends of the-arms R R, the cams V V secured to the spindle .T within the rolland cooperatmg with the arms R R, and the springs WY cooperating with the sleeves S S in opposition to the cams V V. v i .90 7.'In.a paper bag machine of thecharace I ,ter described, the combination, with the upper diamond forming roll D providedwith -the creasing bladeP, and the lower diamond forming roll D provided with the groove P cooperating with the blade P to foilifi the main transverse crease in the bag bla of the plates or fingers Q Q carried by the roll D in rear of the groove P and means for moving said fingers inward and forward upon the face of said roll to approximately the rear line of said groove for the purpose of engaging said fingers with the bag blank in rear of the main transverse crease therein S. In a paper bag machine of the-character described, the combination, with the diamond-forming rolls and their gripping devices, of the rock shafts I I, the springoperated arms 1"- I projecting from said shafts I I, the arms J 3 J 3 provided with the 7 pins J 2 J 2 engaging the arms I I and carrying the anti-frict1on rollers J 7 J the cams J"- J 8 cooperating with said rollers, and the kicker-arms H H carried by the upper ends 5 of the rock shafts I I.

9. In a paper bag machine of the character described, the combination,' with the dialmond-forming rolls and their gripping devices, of the rock shaft I and means for rocking it, the vertical rock shaftsI I mount- .ed at their lower ends upon the rock shaft I and'carrying the rearwardly extending. kicker-arms H H at their upper ends, the. spring operated arms I I projecting from the rock shafts I I, the arms J J provided with the pins J 2 J cngag-ingthe arms I I and carrying the anti-friction rollers J J and the cams J J cooperating with the rollers J J 13o during the formation of the diamond fold, 105

\ vcal posts 1 I -;to said rock shaft 1 the tubular rockshafts '31" I projecting 10. In a'paper bag machine of the character described, the combination of the oak shaft and means for rocking'it, the v rtisecured attheir lower ends [I1 1 mounted upon the posts I I the arms from the roolr'shafts I- I,

the springs J J 6 connected to the arms I I,

the arms J? J 3 having the'pi nsJ J engaging the arms I I"; and carrying the rollers J J, the cams. J d coopera ing with the rollel's, J J and the kicker-arms H H carried by the. upperends of the rock hafts I I.

;--11.-'In a paper bag machine of the char acter described, the combination;- with the I upper diamond-forming roll D and itspins 'a a and creasler blade P, of the rock shaft- K, the depending finger J 'carried'by said rock shaft, and the'cain O for operating the rock shaft .K to swing-the -lower end of the finger. J forward out. of ythepath of-the creaser blade P. .12. In a paper apter described, the combination, withthe bag machine of upper diamond-formin roll. D andits p ns 1 a and qreaser blade l of the rock shaft K, the depending finger J and,.-the outwardly bowed plate or finger J carriedb'ysaid rock shaft,and the cam'O and connections for operating'the rock shaft to swing the'lower ends of said fingers forward to carry the finger J outof the'path of the creaser P.-

13.1111 a paper-bag machine of-tl ie char- 'acter described, the "combination with de- Y 'vic'es for openingout the mouth of the bag in including diamond formin blank and forming rolls,' and fingers bodily" forwardly slidab e over the periphery in. place, of means and lower corners-of the opposite sides of the-lower of crating and connections plates o the diamond fold thei'eblankiri rear-of ofjthe lower diamond forming roll to hold said" bag blank y.f0r. "creasingthe opposite sides of the bag blank on the lines which connect the upper mond fold, su

the diamond fold, to facilitate the formation of the latter.

14. In a paper bag machine of the character described, the combination with de vices for opening out the month of the bag blankand forming the diamond fold therein including diamond forming rolls and-holding fingers Q,- Q, bodil slidableforwardly on 1 said diamond forming rolls,

and means for advancingthe fingers, of a Y pair of rplls, as B, B provided with a creasing blade b and cooperating groove 6 opto' crease the bag blank on the-lines which connect the upper and lower corners 15. In a paper bag-machine of the character described, the combination with the lower diamondaforming' roll, of a pair of plates slidably mounted in inclined grooves -there-' 1 in, and'mea-ns for movi'ngsaidplates or finthe charof the opposite sides of the diamond fold, -to facilitate the formation of the latter, a

o fingers carried :by'said roll and:

gers inward and forward over the face of blank'in rear ofthe main transverse crease therein, during mo'nd'fold, substantially as (lesdribed.

' 16. In -a'p'aper bag machine ofthe char-- acterdescribed, the combination, witi lower diamond formin fingers carri d by said roll and mounted therein, and "cams 'a'rsald roll,'"and operating; in

the

the formation of the diarol, ofa pair of said roll, and engagingthem with the bag the roll, to.bod1ly ad'vance ers' inward and forward

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