US709129A

US709129A - Paper-bag machine.

Info

Publication number: US709129A
Application number: US2004100A
Authority: US
Inventors: Herbert E Westervelt
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-06-12
Filing date: 1900-06-12
Publication date: 1902-09-16
Anticipated expiration: 1919-09-16

Description

No.' 709,129. P Patented sept. I6, |902.

H. E. wEsTERvELT.

PAPER BAG- rMmHlNla.A

(Application led June 12, 19.00.)

(No Model.) 7 sheets-sheet Na. 709,129. l v Patentedsebf. I6, |902.

l H. E. wEsTEavELT.

PAPER BAG MACHINE.

(Application filed June 12, 1900.

ig/is No. 7o9,|29Vl .Patented sept. I6, 1902..

H. E. WESTEIWELT.l PAPER BAG MACHINE.

, Application filed June 12, 1900.) l (un Model.) I7 sheets-sheet sj mi alms Persws ca. womumo.. wAsnma-run. l:4 c,

No. 7o9,|29. Patented sepi. I6, |902..`

` lH. E. WESTERVELL PAPER BAG'MAGHmE.

(Application filed Juni@ 1% 180201.

` 75mm-sheet 4,

.J JL);

Mizwses." zWe/zZLa/f ,Patented Sept. I6, |902.

frm.- 709,12.

H. vE. WESTERVELT. PAPER BAG MACHINE.

(Application filed June 12, 1900.)

7 Sheets-Shea@ 6.

(nu Model.)

'mga

Tnz Nonms PETERS m1, PHOTO-uwe.l wAsHmm'oN. n. c.

2. 0 m m, .L n. nv S d e t n nu t a .P T E. Lm EH v.c DnA EM ma EA wn Du En .A HP.

` (Appliaton led June 12, 1900.) cnn Model.) 1 sheets-snm 7.

UNITED' STATES HERBERT E. WESTERVELT, OF SOUTH BENI), INDIANA.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 709,129, dated September 16, 1902.

Application filed June 12, 1900. Serial No. 20,041. (No model.)

To n/ZZ whom it 11i/tty concern: Be it known that I, HERBERT E. WESTER- VELT, a citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented a certain new and useful Improvement in Paper-Bag Machines, (Case 1,) of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to machines for making paper bags out of tucked tubing, and in particular to that portion of suchmachinery as forms the diamond fold of the Satchel-bottomed bags.

The object of my invention is to provide a simple, practical, and effective machine for thus making the diamond fold.

To the attainment of this and other desired ends myinvention consists in matters hereinafter set forth.

In the accompanying drawings, Figure l is a side elevation of so much of thebag-machine embodying my invention as is necessary to illustrate the invention, certain parts of the machine being broken away for convenience of illustration. Fig. 2 is a plan View of the machine. Fig. 8 is a section on line 3 3 in Fig. 1. Fig. 4 is a plan view of a portion of the machine on an enlarged scale. Figs. 5 and 6 are longitudinal vertical sections on line 5 6 in Fig. 2 of portions of the operating mechanisms of the machine, these mechanisms being shown in different positions in the. two figures. Figs. 7 and S are perspective views of one of the devices of the machine in different positions. Figs. 9 and 10 are perspective views of details of construction. Fig. 11is a view of a bag-blank as it advances preparatory to being folded; and Figs. 12 to 19, inclusive, are views of such blank in process of having its bottom folded into a diamond fold, together with the devices operating to accomplish that result, Figs. 12 to 15, inclusive, being side elevations and Figs. 16 to 19, inclusive, being corresponding plan views.

In bag machinery of the kind to which this invention ielates a tucked tube is automatically advanced to a folding-bed and as it advances is automatically cut into lengths each suflicientfor a bag. The forward end of each bag length is then automatically folded, seas to form it into what is commonly known as the diamond fold. This diamond fold is then pasted and its ends are bent over its body portion, in which position they are secured by the paste. This forms the complete bag, which is then automatically discharged from the machine.

This invention, as I have previously stated, relates tothe folding of the forward end of each bag-blank into a diamond fold. The automatic feeding and cutting of tucked tubing into lengths for the bag-blanks and the pasting and folding of the diamond fold form no particular part of this invention. Any ordinary or usual means for accomplishing these last-mentioned functions may be employed.

In the drawings I have illustrated that portion of a bag-machine which embodies the mechanism for feeding and cutting the bag lengths or blanks and for folding the forward end of the same into the diamond fold. No mechanism for pasting the diamond fold after its formation nor for folding the ends of the same over the body portion to complete the bag-bottom is illustrated. Such mechanism is well known in the art, and any well-known or suitable form thereof can be employed.

The mechanism illustrated in the drawings for feeding the tucked tube, for cutting the same into lengths each sufficient for a bagblank, and for forming the forward ends of these blanks into the diamond fold is supported and incased in a suitable frame A, which is understood to be suitably mounted upon legsA'. TheframeAconvenientlyconsists of opposite vertical side walls a Ct and suitable rods connecting the same.

The mechanism I have shown for automatically cutting the tucked tube into bag-blanks consists of a pair of cutting-rolls 1 and 2, the former of which carries a cutting blade or knife arranged to enter a suitable socket in the roll 2, and thereby sever a bag-blank at each revolution. The cutting-roll 1 has its axis arranged for vertical movement in a box or guideway 3 and is subjected to springs 4, which tend to hold it normally in a lowered position. This allows a slight vertical movement of the upper roll 1, necessary to accommodate the thickness of the tubing. The lower roll 2 is mounted upon a shaft 5, which IOO is the main driving-shaft of the machine. The upper roll 1 is gear-connected with the shaft 5 by means of

suitable gears

6 and 7.

The bag-blanks are fed forwardly by feedrolls 8 and 9, situated to the left of the rolls 1 and 2, Figs. 5 yand 6. The upper roll is mutilated, as shown in Figs. 5 and 6, so that it exerts a positive feeding action during only one-half of its revolution. The feed-roll 9 is driven from the main shaft 5 by a gear 10, meshing with the gear 7 on the shaft 5 and also with a gear 11'on the shaft of the roll 9. The upper roll 8 is driven by a gear 12, meshing with the gear 11.

The diamond fold is made in practically one continuous operation by lifting the upper ply and swinging or folding it back over or above the body of the bag-blank as the lower ply advances. To such end I provide a transverse plate B, which is sustained in an elevated position in order to allow the forward portion of the bag-blank to proceed below it, and is then automatically depressed, so as to press the blank against a folding bed or table C at a point in the rear of the portion of the blank out of which the bottom is formed. This transverse plate thereby delines the transverse crease of the bag-bottom that is to say, the upper ply of the blank is folded backwardly about the forward edge of the transverse blade, so that the latter marks the transverse line or crease separating the bagbottom from the body of the bag. The presserplate B consists of two portions 14 14, arranged on opposite sides of a longitudinal center line, so as to leave a space between their inner ends. As the blank passes from the feed-rolls 8 and 9 the presser-plate is in an elevated position, as shown in Figs. 5 and 12, so that the blank passes below it. rlhe presser-plate is then properly lowered, as shown in Figs. G and 13, so as to rest upon the blank at the proper point to form the transverse crease. The presser or defining plate then advances and moves the bag-blank along with it upon the folding-bed O, the presser-plate always remaining at the same distance from the forward end of the blank.

The mechanism for forming the portion of the bag-blank in front of the presser-plate into the diamond fold, kcan best be understood by first referring to Figs. 12 and 19, inclusive, which illustrate the operation of these mechanisms upon the blank. As the blank advances the upper ply is engaged by a iinger D, Fig. 12, and is lifted slightly thereby, so as to open the, front end of the tube. As the blank proceeds still farther its lower ply passes below a fixed nose E and its npperply passes above the same, so that the nose, in effect, enters the open end of the blank. At about this time two sets of butterfiys F F 1 F F approach the sides of the blank and pass into the tuck between the upper and lower plies. This is shown in Figs. 13 and 17. The

butterfiys F F are in a substantially flat or horizontal position, while the bntterflys F F are arranged to swing about a horizontal axis and are normally in a horizontal position over or above the butteriiys F F. It is in this condition that the sets of butterilys approach the blank and enter the tucks thereof. As the blank proceeds still farther the butterflys F' F swing upwardly and then rearwardly, as well shown in Figs. 7 and 8, so as to swing or turn the upper ply of the blank upwardly and then baekwardly over the body portion thereof about the front edge of the presser-plate B. As this occurs the front end of the lower ply passes still farther under the nose E and between the foremost of a couple of pairs of rolls G G and G G', which are arranged in pairs, one pair above and one pair below the path of travel of the bag-blank. This is shown particularly in Figs. 14 and 18. As the blank proceeds still farther the fore or prow portion of the lower ply passes between the rolls G G and G' G and is followed by the entire relnaining portion of the blank. In so doing the nose E bends back the rear portion of the foldedback part of the upper ply, thus completing the diamond fold, and the rolls G G and G' G act to hold the blank properly in position, Figs. 15 and 19. The action of the rolls G G and G G in holding the blank is continuous during the entire formation of the diamond fold. At the time when the upper ply as it is being folded back passes the position in which its side walls are substantially vertical, as in Fig. 14, these side walls are acted upon by flaps or wings H I-I, which swing rapidly downwardly and rearwardly and press the side walls slightly inward, and thereby insure their proper inward fall. These wings are shown in Fig. 14 and also in Fig. 9. The wings H H are providedfor the purpose of only slightly bending or directing the paper of the folds inwardly, so that in the subsequent operation of the machine these folds will be properly directed so that they will not be torn and so that the character of the folds may be fully predetermined. After passing between the rolls G G and G G the blank proceeds between a couple of pairs of folding-rolls, which act to flatten it out and crease it along the lines of the various folds. These folding-rolls act upon the opposite side portions of the blank. As such rolls as these are known in the art, I have not illustrated them and their action in diagrammatic figures. In this way the forward end of the bag-blank is formed and creased into the well-known diamond fold. It then proceeds to suitable mechanism by which it is pasted and is folded so as to complete it into the satchelbottomed bag. This pasting and supplemental folding mechanism I have not shown in this application, for, as I have said, it forms no part of my present invention.

Having thnsdescribed the devices which act upon the blank and the action of the same,

I will now proceed to describe the mechanism' which I have shown herein for actuating such IOO IIO

devices. The upper plate B, consisting `of the separate sections 14: 14, is supported at its outer endsby uprights 18 18, and the lower ends of the uprights 18 18 are connected together by means of a cross rod or bar 19, which is arranged below the table C. The presser-plate portions 14 14, the uprights 18 18, and the cross-rod 19 thus form a rigid frame, which advances bodily with the bagblank. This frame is well shown in Fig. 3. It is moved backward and forward bodily longitudinally of the machine along a pair of longitudinally-arranged side rods or ways 20 20, Figs. 1, 2, and 3. The uprights 18 18 are providedwith sockets 21 21, which inclose the ways 20 20 and slide along the same. The frame thus carrying the presser-plate is slid backward and forward along the ways 2O 2O as guides by mechanism consisting of links 22 22, pivotally connected with the uprights 18 18, and long levers 23 23, pivotally connected to the rearward ends of the links 22 22. The levers 23 23 are pivoted at their lower ends and are operated 'by links 24 24, and these in turn operated by pivoted levers 25 25, whose upper ends are actuated by cams 26 26 on the main driving-shaft 5. By means of this mechanism` the frame carrying the presser-plate is moved properly in a forward direction, so as to advance the bag-blank, and is then rapidly retracted after it has advanced sufficiently to allow the diamond fold to be formed. It will be observed that by thus forming the presser-plate of transversely divided and separated portions it can be advanced while in position upon the blank to a point beyond the device for holding the lower ply, consisting of the nose E and rolls G G and G G', without-interferin g with the same. The separated portions ofthe presser-plate will pass on opposite sides of the nose E and rolls G G and G' G. It willbe thus seen that by my invention I arrange for the proper holdingof one ply of the bag'blank by the centrally-arranged holding devices during the operation of the butterilys or win gs for entering the tuck and folding back the other ply of the blank and that the presser or defining plate is allowed to advance the desired extent without interfering with such holding device. In order to allow thepresser-plate t0 be raised properly to permit the passage of the bag-blank below it and `to be` then depressed to rest upon the blank, the forward ends of the guiderods or bars 2O 20 are pivotally connected with the frame, so as to permit their rear portions to be swu ng vertically, and suitable means are provided for properly raising and lowering these rods. The mechanism illustrated for thus raising and lowering them comprises vertically-extending arms `or extensions 27 27, Figs. 1, 5, and 10, whose lower ends are fitted upon the rearward ends of the rods 2O 2O and Whose upper ends are provided with rolls 28 28 and cams 29 29, se-

cured to the shaft of the mutilated feed-roll 8 and arranged to act upon the rolls 28 28.

These calms are so constructed and `positioned that they operate to lift the rolls 28 28, and thereby swing the rods 2O 2O upwardly at a time when the fore part of the bag-blank is emerging from the feed-rolls and to allow the same to drop, and thereby depress the presserplate, after a portion of the bag-blank sufficient for a bag-bottom has passed below the presser-plate.

I will now proceed to describe the operation of the finger D. This finger, as has been previously stated, acts to enter between the plies of the advancing blank and separate the same. It is normally in position close to the feed-rolls 8 and 9, as shown in Fig. 5, in which position the blank advances to it, so that the upper ply passes above and the lower ply below it. From this position it recedes away from the rolls 8 and 9 as the blank advances, during which movement it moves `upwardly as well as forwardly, thereby separating or opening the plies of the bag-blank a greater extent. This fingerD is conveniently formed at the lower end of a long arm 30, which is pivotally supported at the top of standards A? A2, which rise from the sides of the machine-frameA. The shaft 31, carrying the arm 30, is rocked so as to swing this arm by a reciprocating link 32, pivotally connected with a rocker-arm 33 on said shaft 3l. i The link is reciprocated by a cam 34E, coperating with a wheel 35 on the end of the link, the said cam being mounted upon the shaft carrying the upper feed-roll 8. The lower `end of the link is forked and the forked por tions extend on opposite sides of the shaft of the feed-roll 8, so as to guide the link in its reciprocating movement.

I will next proceed to describe the operation ofthe butterflys. In entering the tuck of the blank and folding the upper ply backwardly over the top portion of the blank, as previously explained, the butterfiys F F swing about one of their edges, while the butterfiys F F always maintain a substantially horizontal position. To such end the wings F F are fixed to standards or uprights 36 36 and the wings F F are pivotally connected with the same, as shown in Figs. 7 and 8. These standards 36 36 are provided with transverse apertures 37 37, by which they can be fitted upon the cross-rods 19, forming the lower strut or member of thelongitudinallymovable frame carrying the presser-plate. In this way the standards 36 36 can be moved inwardly to enter the tuckin the blank and back again by sliding uponthe rod 19. The standards 36 36 are normally held in the retracted position in which the butterflys enter the tuck of the blank by springs 37 37, connected with them and with the uprights `18 18 and always tending to draw the standards toward the latter. The standards 36 36 are automatically moved inwardly by` cams 38 38, Figs. 1 and `3, having diagonal or inclined portions 39 39, Vwhich will throw the standards inwardly, and also having :straight portions IOO 40 40, which will maintain the standards in their inner position during the length of time required for the operation of the butterflys. These cams 38 are secured to a cross-piece 4l of the machine-frame. They coperate with rollers 42 42, attached to the lower ends of the standards 36 36.

From the foregoing it will be seen how the butterflys are automatically moved inwardly to enter the tuck of the tube, and it may be here stated that in order that the butterflys may not be elevated to such an extent as to be in position above the tuck of the blank the end portions of the cross-rod 19 are inclined downwardly, so that when the standards 36 36 are at the end of this rod they will be sufficiently low to be opposite the tuck of the blank.

It now remains to describe, in connection with these butterlys, how the rear wings F F/ are swung backwardly to fold the upper ply back. The mechanism shown for this purpose consists of a pair of curved arms 44 44, whose upper and rear ends are secured to the tops of the arms 27 27 and whose lower and forward ends are provided with inclined noses 45 45, which are situated in the path of travel of the upper wings F/ F. As these wings advance they are engaged by the noses 45 45 and gradually swung through an arc of one hundred and eighty degrees, as illustrated in Figs. 7 and 8. The complete operation of these tuck-entering and ply-folding devices is that they are carried by and arranged for relative transverse movement upon the bodily-movable frame, which advances with the advancement of each blank and is then reciprocated backwardly for another blank, and that as they are advanced by the bodily forward movement of the reciprocating frame they are moved inwardly to engage the plies of the blank by the cams 38 38 and after such inward movement one in each pair is swung backwardly by the noses 45 45. During this folding back of the upper ply of the blank the lower ply, it will be remembered, is properly held by the rolls G G and G G. After the standards 36 36 pass the cams 38 38 they are automatically retracted by the springs 37 37, and during the return stroke of the frame carrying the butterfiys, these standards avoid the cams by passing outside thereof.

I will now describe the arrangement and construction of the nose E, which operates to complete the opening of the bag-bottom and carries upper holding-rolls G G. This nose is attached to the rear ends of long bars 46 46, which are secured to the forward portion of the machine-frame, as shown in Figs. 5 and 6, and extends rearwardly to such an extent that the nose E is properly located above the folding-bed C. The rolls G G are properly journaled in the bars 46 46, Fig. 4, and are provided with gears 47 47, which mesh with an intermediate gear 48, so as to turn the two rolls in unison. The forward roll G, carried by the bars 46 46, and is driven by a pinion 49 at the middle of a shaft 49, carrying at its end a pinion 49h, meshing with a gear 50 on the shaft 51, Figs. 1 and 2. The gear 50 meshes with a gear 52, carried by a shaft 53, arranged below the shaft 51, and the gear 52 is driven bya gear 54, meshing with a gear 55 on a shaft carrying a lower feed-roll 9. The lower small rolls G G', cooperating with the upper rolls carried by the arm supporting the nose E, are suitably journaled in the support a3 on the tie-bar 41, as shown in Figs. 5 and 6. These lower rolls G and G are likewise provided with gear-wheels which mesh with an intermediate pinion 57, and the pinion of the forward roll G is driven by a pinion 58, Fig. 1, at the middle of a shaft 58, having at its end a pinion (not shown) meshing with the gear-wheel 52 on the shaft 53. The rolls J and J', which roll and press the diamond fold, and thereby flatten the same out, are mounted upon the

shafts

51 and 53, as illustrated in Figs. 1, 2, 5, and 6. These rolls will be driven, of course, bythe rotation of these shafts by the gearing heretofore described as driving the small rolls G G and G G.

I will now describe the mechanism for operating the swinging leaves or wings H H, which, it will be remembered, are swung rapidly forward to press the sides of the backwardly-folding upper ply inward, so as to prevent its tearing. These wings are carried at the lower ends of vertically-disposed arms 60 60, secured to a shaft 61, journaled in the frame-upright A2 A2. This shaft 61 is properly rocked by a link 62, pivotally connected with a rocker-arm 63 on the shaft 61 and having its lower end provided with a roll 64. The lower ends of the links 62 62 are forked, as shown in Figs. 1 and 9, and the forked portions extend on opposite ends of the shaft 51, so as to guide the links in their reciprocating movement. The wings H H are desirably bent inwardly at their forward ends, so that as they move rearwardly such end portions will act to force the sides of the blank toward one another. The bag-blank is thus properly formed and is compressed and folded, so that it issues between the folding-rolls in a properly folded and pressed diamond fold for a Satchel-bottomed bag.

What I claim as my invention is- 1. The combination with a folding-bed; of a defining-plate consisting of two separated and relatively immovable portions; means for turning or folding back one of the plies of the blank; and a device for holding the other ply during the operation of said plyfolding means, the said holding device being located so that the opposite portions of the defining-plate will pass on its opposite sides.

2. The combination with the folding-bed; of a defining-plate combined with means for automatically advancing the same over the folding-bed; devices for entering the blanktucks and folding back one of the plies there- IOO IIO

ing said holding device so that the advance of the defining-plate causes a relative movement of the same toward and past the holding device, substantially as described. d

3. The combination with the folding-bed; of a defining-plate consisting of twoiixed portions, separated so as to forma space be` tween their inner ends; a frame supporting the portions of the dening-plate and eX- tended across the machine below the foldingbed; means for advancing the defining-plate along lthe folding-bed; means for folding back the upper ply of the bag-blank; and a device for holding the lower ply thereof, said device being located in line with the space between the inner ends of the defining-plate.

4. A dening-plate consisting of two separated portions, in combination with two uprights, to which said portions are secured at their outer ends; and a tie-rod connecting the other ends of said uprights.

5. The combination with the defining-plate consisting of two fixed portions separated at their inner ends; a frame carrying said defining-plate,and consisting of uprights secured to the outer ends of the portions of the plate; and a cross-rod extending between the lower ends of the uprights; swinging ways along which said uprights can travelgand means for advancing the same along said ways.

6. The combinationwith the folding-bed; of a dening-plate consisting of two fixed portions separated at their inner ends; means for advancing the defining-plate along the folding-bed; means for forming the bag-blank into a diamond fold during itsadvancement along the folding-bed; and holding devices acting upon the central portion of the blank duringthe formation of the diamond fold.

7. The combination with the folding-bed; of a defining-plate arranged to travel along the same, said plate consisting of two fixed portions separated at their inner ends; and one or more sets of rollers arranged in position to act upon the bag-blank, and in line with the space between the inner ends ofthe defining-plate.

8. The combination with the foldingbed and with tuck-entering and ply-folding devices combined withV mechanism for advancing such devices along the folding-bed; of rollers foi` acting upon the bag-blanks; means for supporting said rollers above and below the path of travel of the blank over the folding-bed, between the paths of travel of the tuck-entering and ply-folding devices, substantially as described.

9. The combination with the folding-bed; of an arm secured totheforward portion of the machine, and extending rearwardly toward and over the folding-bed; a nose at the rear end of the said arm; and one or more sets of rolls, one in each set being arranged above and the other below the path of travel of the blank over the folding-bed, the upper rolls being journaled in said arm and the lower ones in a support below the folding-bed. l0. The combination with the folding-bed; of a defining-plate consisting of two fixed portions separated at their inner ends; means for advancing the defining-plate along the folding-bed; means for turning back 'the upper ply of the blank to form the diamond fold; one or more sets of rolls secured `in position, tbe upper one above and the lower one below the path of travel of the blank, said rolls being arranged between the paths of travel of the two portions of the deningplate; and means for driving said rolls.

l1. The combination with aframe arranged for travel forward and backward in the machine; a cross-rod carried by said frame; and devices for entering the blank-tucks and folding the plies of the blank into the diamond fold, said devices being carried by an arrangement to travel upon the cross-rod of said frame.

12. The combination with the definingplate; of a frame carrying the same, .and embodying in its construction the cross-rod; standards mounted upon said cross-rod and arranged to slide along the same; and but- Vterfiys carried by said standards.

13. The combination with the folding-bed; of a movable frame carrying the presser-plate consisting of two fixed portions separated at their inner ends; the said frame being constructed with a cross-rod forming the lower transverse member of the frame; longitudinally-arranged ways for carrying said frame,

`said ways being pivoted at their forward ends so as to permit them to `swing vertically; means for advancing the frame along the ways and retracting the same; means for holding the ways in an elevated position, and for lowering the same duringthe initial movement of the frame along the ways; standards carrying butteriiys adapted to enter the blanktucks and fold backward the upper ply of the blank; said standards being arranged for transverse movement relatively to the machine, upon the cross-rod forming a part of the said movable frame; cams constructed with inwardly-inclined surfaces for moving the standards inwardly as the frame carrying them advances, and also with straight surfaces for maintaining them in their inward position and abutments secured to the swinging ways and adapted to engage the buttertlys and swing the same as they are advanced 'by the advancement of the frame along the ways.

14. The combination with the swinging ways; of the upright arms 27 secured to the rear ends thereof; means for` cooperating the said arms to elevate the rear ends of the ways; and arms 44 secured to the upper ends IOO IIO

of the arms 27, and provided with noses or abutments 45 adapted to engage the butteriiys.

15. The combination with the folding-bed; of longitudinally-swinging ways arranged for vertical swinging movement; means for swinging said ways vertically up and down; a frame movable along said ways and carrying a presser-plate, said frame being constructed with a transverse cross-rod having its outer end portions inclined upwardly from its ends; standards arranged to move upon said cross-bar, and provided with tuck-entering and ply-folding devices; and means for actuating said standards so as to cause their inward and outward movement.

16. The combination with the folding-bed, and means for lifting the end of the upper ply of the blank and swinging the same upwardly and downwardly in a single continuous movement over the body portion of the blank so as to form the diamond fold; of wings or flaps adapted to strike against the sides of the blank and bend or press the same inwardly; and mechanism for swinging such wings or flaps so as to cause them to brush or` strike against the sides of the blank.

17. The combination with the folding-bed, and means for forming the diamond fold thereupon; of leaves or iiaps H having inturned portions; swinging arms carrying said leaves or flaps; a rock-shaft carrying said arms; a link pivotally connected with a rocker-arm on said rock-shaft; and a cam for reciprocating said link.

' 18. The combination with the folding-bed and with means for forming the diamond fold thereupon, of a pair of Wings or liaps adapted to strike against the sides of the blank and bend or press the same inwardly, and means for swinging such wings or naps in a direction longitudinally of the folding-bed, substantially as set forth.

19. The combination with the folding-bed and with means for forming the diamond fold thereupon, of a pair of wings or iiaps adapted to strike against the sides of the blank and bend or press the same inwardly, mechanism for swinging such wings or flaps in a direction longitudinally of the folding-bed so as to strike the sides of the blank and means for moving the bag-blank in a direction opposite the direction of movement of the swinging wings or flaps at a time when such wings or iiaps strike against the sides ofthe bag-blank, substantially as described.

20. In a bag-machine, means for slightly turning in the sides of the bag-blank when such sides are in a standing position during the formation ofthe diamond fold, said means comprising a pair of longitudinally-extending and inwardly-inclined blades arranged on opposite sides of the bag-blank, and means for producing a relative longitudinal movement between the blades and the blank in such a direction that the ends of the blades separated most widely from one another meet the blank first, whereby the further longitudinal movement after such meeting causes the converging portions of the blades to rub against the blank sides throughout their length, and thereby turn or bend the same in, substantially as described.

2l. The combination with means for separating the plies of the bag-blank and swinging them continuously away from one another so as to form the diamond fold in a single operation, of means for turning the side edges of the blank slightly in when the same are in a standing position, and before the beginning of the folding operation, whereby the edges are directed inwardly and tearing of the same is prevented as the swinging movement of the plies is continued to form the diamond fold, substantially as described.

22. The combination with means for defining the primary crease of the bag-bottom, of means for engaging the lower ply of the bagblank, means for engaging the upper, ply and swinging it continuously upwardly, backwardly and downwardly so as to form the diamond fold in a single operation, edge-turners adapted to turn the side edges of the blank slightly in, and means for operating said edgetux-ners so as to cause them to act upon the side edges of the blank when the same are in a standing condition, and to separate from the same before the beginning of the folding operation, substantially as and for the purpose set forth.

23. The combination with the folding-bed, of a presser-plate for holding the bag-blank upon the folding-bed and defining the primary crease, means for holding the lower ply of the blank to the folding-bed, a device for engaging the upper ply of the blank, means for actuating such device so as to cause the upper ply of the blank to be separated from the lower ply and swung upwardly and backwardly and then downwardly upon the body portion of the blank in a single continuous operation, edge-turners adapted to turn the side edges of the blank slightly in, and means for actuating said edge-turners so as to cause them to act upon the side edges when the same are in a standing condition, and to withdraw therefrom before the beginning of the folding operation, substantially as and for the purpose set forth.

24. The combination of devices for engaging the lower ply of the bag-blank, devices for engaging the upper ply of the blank and folding the same backwardly, and edge-turners adapted to act upon the edges of the bagblank when the same are in a standing position.

25. The combination of grippers for engaging the lower ply of the bag-blank, devices for engaging the upper ply and folding the same backwardly,a creasing-blade adapted to form the transverse crease for the primary fold, and edge-turners adapted and arranged to act upon the edges of the bag-blank when the same are in a standing position.

IOO

IIO

thesame against; the folding-hed, and edget-urning devices adapted and arranged toact upon bhe edges of the bag-blank when the upper ply is bent; or folded baekwardly by the ply-folding devices to an extent; to place the edges of thelolank in a standing condition. In Witness whereof I hereunto subscribe my name this 2d day of June, A. D. 1900.

HERBERT E. WESTERVELT.

Vitnesses:

A. MILLER BELEIELD, HERBERT F. OBERGEELL.