US2087704A

US2087704A - Bag making machine

Info

Publication number: US2087704A
Application number: US40246A
Authority: US
Inventors: Potdevin Adolph
Original assignee: Potdevin Machine Co
Current assignee: Potdevin Machine Co
Priority date: 1935-09-12
Filing date: 1935-09-12
Publication date: 1937-07-20
Anticipated expiration: 1954-07-20

Description

July 20, 1937. A. POLI'DEVIN 2,087,704

BAG MAKING MACHINE Filed Sept. 12, 1955 5 Sheets-Sheet l IN VEN TOR.

p a 2mm k3 ATTZRNEYS? Jul 20, 1937. A. Po'rosvm BAG MAKING MACHINE Filed Sept. 12, 1935 5 Sheets-Sheet 2 INVENTOR ATTORNEYS.

5 2 37- A. POTDEVIN 2,087,704

BAG MAKING MAcHIfiE' Filed Sept. 12, 1935 3 Sheets-Sheef 3 INVENTOR.

ATTORNEYS.

Patented July '20, 1937 UNITED STATES PATENT OFFICE BAG MAKING MACHINE Adolph Potdevin, Garden City, N. Y.,' assignor to Potdevin Machine Company, Brooklyn, a corporation of New York This invention relates to bag making machines, and has for one of its objects the provision of a machine wherein a new and improved and simplified construction is employed whereby the machineican be readily accommodated to the making of bags of different lengths, the range of bags capable of being made on this machine being greater, than usual bag making machines.

The present invention also provides a construction wherein the completed bags are collected directly from the bottoming mechanism, the bags as they are collected or stacked beingcounted.

Other objects of the invention will be manifest from the following description and the accompanying drawings.

In the drawings: Fig. 1 is a more or less diagrammatic view of a machine embodying my invention;

Fig.2 isan elevationai view of the delivery end of the machine; a

Fig. 3 is a plan view of the same;

' Fig. 4 is a sectional view taken substantially on the line 4-4 of Fig. 2: and

Fig. 5 is an enlarged elevational viewofIthe stacking or bag collecting mechanism.

Referring to the drawings in detail and first of all to Fig. 1, l designates asupply of the material in web form from which the bags are to be made. The web 2 passes from this supply about a roller 3 and'from thence past an adhesive applying device comprising a disc 4 contacting the web and transferring paste .or glue 6 from the trough l to the web.

.The web then passes about a roller 9 to tubing mechanism Ill where the web "is continuously tubed. 1 7

The tubing passes betw'eeniollers and feed rollers 22 and from thence to pinch rollers 28 which hold the tubing while the same is out 01f into bag lengths'by stationary knife 23 and striker bars 24.

During the cutting off operation the forward part of the tubing is momentarily held by the pinch rollers 28' which, as is customary, provide a slack in the tubing during the cutting off operation.

The upper pinch roller is shown as providedon its periphery with pinch blocks 29. and 30 disposed 180 apart, the lower pinch roller be-' ing provided with a flattened portion 3|. on one side-thereof for a purpose to be brought out hereinafter. This lower pin-chroller is adjustable circumferentially on its shaft.

' The tubes are bottomed on a bottoming drum 40 mounted on a shaft 4|.

by a shaft 54.

, The periphery of the drum 40 is provided with a plurality of equally spaced slots or bottom ing stations, and adjacent each of these stations there .is provided a rock shaft carried by the drum andprovided with gripper jaws ,or' gripper plates 46. Each rock shaft is equipped with a cam follower l'I-j adapted to engage a stationary opening cam 48. As usual in these machines the gripper jaws or plates are spring closed.

Intermediate the pinch rollers 28 and the bottoming drum and on the frame of the machine I at a fixed distance from the pinch rollers is a tucker plate cylinder carrying a tucker plate 5| for en aging the face of each bag lengtha .the cam follower rides off the cam 48, closing on the material of the bag length to attach the.

same .to the drum.

The bag length which is new attached to the bottoming drum is advanced thereby to a pasteapplying device mounted beyond the tucker cylinder. This paste-applying device which is mounted on the machine frame just above the bottoming drum; asshown in Fig. 2, comprises a paste pot adjustable by means 'of a screw 56 and provided with a glue transfer roller 52 mounted for rotation therein. -This roller 52 transfers glue to-a paster bar 53 which is driven after, the pester bar makes .one revolution for each station on the bottoming drum 40, the tucker cylinder 50 making two revolutions for each station. The machine is so timed that the paster bar will engage the face of the bag length behind the .tumed up end 53 thereofas the bag length Inasmuch as I:

passes the paste-applying device. the tucker cylinder 50 makes two revolutions for each station 44 on the face of the bottoming drum, I provide the face of the drum with slots Ill intermediate the bottoming stations for accommodating the-tucker plate 5! between tucking operations, thereby preventing injury to the bag material due to the same being pinched between the tucker plate and the face of the bottoming In connection with the v and so far described wherein the tucker cylinder Ill-is located intermediate the pinch rollers 28 and As .will be brought out hereinconstruction provided the paste-applying mechanism, it is to be noted that by separating the tucker cylinder and the paste-applying mechanism, that is, by mounting.

the tucker cylinder intermediate the pinch rollers and paste-applying mechanism, and by employing a relatively small cylinder 50, bags of very short lengths can be readily handled, the employment of the'small diameter tucking cylinder permitting the same to be located very close to the pinch. rollers.

When each bag length has been acted on by the paste-applying bar 53 it is carried by the ly from the bottoming drum. Referring to this part of my apparatus, 60 designates a cam cooperating with the cam followers 41 of the gripper plates 46 for opening these gripper plates to release the finished bags from the bottoming drum. This opening cam is mounted on an arm 6| carried by the shaft 4| of the bottoming drum. The arm 6| hasa slight oscillatory movement on the shaft 4|, being adjustably secured to a lever 62 mounted on this same shaft, the lever 62 being cam actuated as will be brought out presently to vary the setting of the opening cam 60.

I0 designates a shaft extending longitudinally of the machine and carrying the striker bars 2 This shaft 10 carries a large bevel gear I2 meshing with a small bevel gear II on the drive shaft 42 of the machine, the gearing being 2:1 so that for every revolution of the shaft I0 the drive shaftmakes two revolutions. The shaft 10 adjacent its other end is provided with a sprocket I3 which through sprocket chain I4 drives a sprocket I5 mounted on a shaft I6. The sprockets I3 and I5 have a 2:1 ratio, the sprocket I3 being twice the diameter of the sprocket I5.

The shaft I6 carrying the sprocket I5 is pro-' vided with a worm 'II meshing with worm wheel I8 mounted on a shaft I9 extending transversely of the machine at the rear of the bottoming drum.

The shaft I9 is provided with cams and 8|. The cam 80 is adapted to engage a projection 83 on the lever 62 above referred to for actuating the arm 6| which carries the opening cam 60 whereby the setting of the cam 60 will be varied, thereby to varythe opening of the gripper jaws or gripper plates 46 accordingly for a purpose to be later set out.

Straddling the shaft 19 is an arm 84 which carlies a cam follower cooperating with the cam 8|. The "outer end of the arm 84 is connected to an arm 86 mounted on shaft 9| for imparting a rocking motion thereto as the arm 84 is actuated by the cam 8|. A spring 81 maintains the cam follower 85 in engagement with the cam 8|.

Aflixed to the shaft 9| is an arm provided at its free end with pivotally mounted counting fingers 92. A'spring 88 is secured to the tail of each of these fingers, the other end of these springs being anchored. These springs hold the fingers 92 normally in the position shown in full lines in Fig. 5. The setting of the fingers on their pivots is controlled by a stop screw 88.

The completed bags are delivered by the bot-- toming drum directly to a table I25 equipped with a counterweighted carriage I26 which provides a carriage moving rearwardly, as will be appreciated, as the bag stack builds up.

As shown in Fig. 2 of the drawings the upper pinch roller 28 is provided with two pinch bars 29 and 30, the bar 30 being removable, set apart so thaton. one revolution of the pinch roller 28 each of the pinch bars will have operated. This construction is employed when tubes shorter than the circumference of the pinch roller are being handled. When tubes longer than the circumference of the pinch roller are being run, the pinch bar 30 is removed.

The bottoming drum 40 is .driven off the shaft I0, heretofore referred to and which rotates at one half the speed of thedrive shaft 42, through the medium of bevel gear I50 carried by the shaft I0, this gear meshing with bevel gear I5I on shaft I52 extending transversely of the machine. The gear I50 is twice the diameter of the gear NH.

The shaft I52 at its end remote from gear I5I carries a gear I53 in constant mesh with bottoming drum gear I54.

The tucker cylinder 50 is provided with a gear I55 meshing with large gear I56 carried on the bottoming drum shaft 4|. The shaft 54 for the paster bar 53 is driven from the large gear I56 through the medium of a gear I5'I on the paster bar shaft 54. The paster bar gear I5I is twice the diameter of the tucker plate gear I55.

The pinch rollers 28 are geared together 1:1 by gears I58. The shaft of the lower presser roller is provided with driving gear I59. The pinch rollers are capable of being driven one revolution for each bottoming station on the drum 40 or one-half a revolution for each bottoming station depending upon whether the tubes being handled are as long at least as the circumference of each of the pinch rollers, in which event only one pinch bar will be employed, or shorter than the circumference of each of the pinch rollers in which event both pinch bars will be employed.

In the first instance, i. e., one revolution of the pinch rollers for each bottoming station, with one pinch bar in use, the driving gear IE9 is meshed with a wide faced gear I60 which also meshes with the bottoming drum gear'l54. In

' the second instance,with both pinch bars operative, and pinch rollers rotating one half revolution for each bottoming station, this widegear I I60 is replaced with a compound gear composed of large gear I6I and half size gear I35, the former meshing with bottoming drum gear I54, the latter with the gear I59. The compound gear and the broad faced gear are mounted adjustably on a bracket I62.

The forwarding rollers 22 are driven from drive shaft 42 through change gear III, intermediate gear II I adjustable on the bracket I I0 and a gear on the shaft of the lower forwarding roller. The forwarding rollers are geared together 1:1 as will be understood.

The bottoming drum 40, pinch rollers 28, tucker bar cylinder 50, paster bar 53, the bag collecting station, are all mounted for movement as a unit toward and away from the cut-off station ona rack I00 capable of being moved by pinions I03 mounted on a shaft I02 manually rotated through the medium of a handle IGI.

The shaft I0 which carries the gear I50 which constitutes the drive gear for the pinch rollers,

tucker plate cylinder and paster bar, is splined on the shaft I0, the latter being provided with a keyway I I3 so as to permit of adjustment of the parts above referred to toward and away from the cut off station without disrupting the gear trainfor driving this mechanism. The sprocket a speed as to make one-half a revolution for each bottoming station 44 of the bottoming drum so that both pinch bars 29 and 30 willoperate on each revolution of the pinch rollers, the bag tubing is forwarded by the forwarding rollers 22, past the cutting off station to the pinch rollers and from thence to the bottoming drum.

As the end of the bag tubing comes up to the bottoming drum, the bottoming drum is rotated into position to bring the bottoming station 44 adjacent the tucker plate cylinder 50, the tucker plate engaging the face of the tubing which will now have been severed by one of the striker bars 34, to depress the same into the bottoming station. As the bag length is depressed into the bottoming station it will be gripped by the gripper plate 45, the machine being so timed that as the material of the bag length is tucked into the bottoming station the cam follower 41 of the gripper stop will have ridden off its opening cam 48. The'bag length now being attached to the bottoming drum is carried forward thereby to be engaged by the paster bar 53 which engages the upper face of the bag length just behind the turned .up end 53 thereof. The pasted bag length is next advanced by the bottoming drum past presser roller 51 which presses over the turned up end 53' of the bag length upon the Y pasted area of the bag length. This completes the bottoming operation.

to release a bag from the drum earlier than the majority .of the bags are released so that the tops of these earlier releasedbags will extend above the top of the main stack of bags to facilitate counting, the cam '60 must be shifted automatically so as to be in position to be earlier engaged by the tails 41 of the grippers 46.

In Fig. 2 the parts are shown in position where the cam 6|] is in its latest releasing position. It-

will be appreciated, however, that as the cam 80 v continues its rotation in an anti-clockwise direction, as viewed in Fig. 2, the high part of the cam willfinally ride under the cam follower 83 on the arm 62 to raise the latter and the cam- 60 so as to effect to the-same degree an earlier opening of thegrippers 46. This earlier opening of the grippers 46 has been illustrated in Fig. 2 wherein a bag A has been released considerably earlier than the majority of the bags in the stack of collected bags designated I21 so that the top of this bag A will project beyond the ,top of the main portion of the stack. The fingers 92 are at this time in the position shown in Fig. 2 and as will be seen fromthis figure are engaging the elevated bag A to hold the same against the face of the bags ahead of it until several following bags carried by the bottoming drum have been released behind it upon the table I25, after which the fingers 92 may be released and the bag A will drum remain in its elevated position due to the pressure of the bags behind it. The result of all this is that a stack of bags will be built up on the table I25, as illustrated in Fig. 5, wherein two bags which are designated I28 have been shown extending above the top of the main stack of bags.

With the parts in the position shown in Fig. 2, it will be apparent that on continued rotation of the cam ill the arm 84, the cam follower B5 of which is in engagement with the face of the cam,

will be moved gradually endwise in a direction away from the shaft 19 until it finally reaches the 'full line position shown in Fig. 5. This will cause the arm 90 to be rocked downwardly to the full line position shown in Fig. 5 carrying with it the fingers 92 as will be'appreciated. On continued rotation of the cam 8| the arm 84 will move in the opposite direction under the action of the spring 81, gradually raising the arm 90 and fingers 92 until the 'armand fingers have reached the dotted line position shown in Fig. 5. At this time, as will be seen from an inspection of said figure, the fingers are lying in grooves 90 provided for that, purpose in the face of the bottoming drum. Each finger, that is to say, the tail of each finger is provided with a stop member or pin Hill and with the fingers in the dotted line position of Fig. 5 these pins are adapted to engage a fixed part of the machine, as shown in that figure, to

prevent further upward movement of the fingers.

dotted line position of Fig. 5, the cam 80 has moved into position'so that the arm 62 has been raised to its extreme uppermb'st position to move the opening cam 60 into position which will cause the earliest opening of the gripper jaws 46.

Likewise, it will be appreciated that the bags at moved to its earliest opening position the cam 8| will have moved to a position where a step A29 therein has come abreast of the cam follower 85, with the result that under the action of the spring 81 there will be a quick upward movement of the' free end of the arm 90, but inasmuch as stop pins I carried by the fingers .92 are held against further upward movement, the fingers will be rocked about their pivots with a sharp motion into the positionshown in Fig. 2, so that the upper ends of these fingers will engage the rear face of the earliest released bags'which have been designated A, to hold the same against the bags which preceded them, so that the top thereof will project above the top of the'bag stack. Just as this happens a cam follower 83 on the arm 62 will drop off of the high part of the cam 80 allowing the opening cam to drop, down so that the bags following the bag A will now be later released and will be directly upon the table I25 behind the fingers 92. After a sufficient number of bags have built up behind the elevated bag A so that the pressure of these bags will be sufficient to hold the bag A in its elevated position, the arm 84 is again forced upwardly to the full line position shown in Fig. 5, as above explained, the bags will thereafter be released inthe normal way un- I til the fingers 92. are again moved upwardly, as

above explained, that is to say, until the fingers 92 go through their next cycle of operation.

It will be seen from all of the foregoing that the present invention provides a bag making machine in which the range of bags capable of being handled on a single machine is considerably increased over the range possible with usual bag machines. 5 It will be apparent to those skilled in this art that by mounting the tucker cylinder 50 separately from the paster bar 53 and rotating the same at relatively high speed a small diameter cylinder can be employed, permitting the same to be adjusted closer to the pinch bars 28 than heretofore possible, thereby accommodating the machine to bags of very short lengths.

I have explained above that when the machine is to be accommodated to very short bag lengths, that is to say, bag lengths which are shorter than the circumference of either of the pinch rollers 28 then the compound gear composed of gears l6! and I35 will be employed, in which event the pinch rollers will be driven at a ratio of one half to one, that is to say, will make one half a revolution for each bottoming station on the drum.

' When longer bags are to be handled, that is, tubes which are as long at least as the circumference of each of the pinch rollers 28, then the compound gear will be replaced by a wide faced gear I60 so that the pinch rollers will make one revolution for each bottoming station on the bottoming drum.

It will be seen, furthermore, that the present invention provides an arrangement whereby the bottoming drum, pinch rollers, tucker plate cylinder, paster bar, collecting station, etc. may be adjusted as a unit toward and away from the cut-01f station, thereby facilitating adjustment 5 of the machine to accommodate bags of varying lengths, this adjustment being efiected without disrupting the driving mechanism.

It will be seen, furthermore, that the present invention provides an arrangement in which the comprises bottoming successive bag lengths, then' positively and directly collecting the completed bags and misaligning a collected bag at regular.

intervals.

2. In the making of bags, the-method which comprises bottoming successive bag lengths, then positively and directly stacking ,the completed bags on end, while raising the top of a bag of the stack at regular intervals above the tops of the other bags of the stack.

3. In the making of bags, the method which comprises progressively forming a web into a tube as the web is continuously advanced, severing the continuously advancing tubing into bag lengths, bottoming each bag length, positively depositing the bottomed lengths at a collecting station, and at regular intervals during the depositing operation misaligning a deposited bag relatively to the adjacent bags.

4. In the making of bags, the method which comprises progressively forming a web into a' bottoming drum delivers the completed bags di-- rectly to a collecting station, as distinguishedtube as the web is continuously advanced, severing the continuously advancing tubing into bag lengths, bottoming each bag length, positively depositing the bottomed lengths on end upon a col. lecting station, and at regular intervals maintaining a completed bag in elevated position so that its top is above the tops of the adjacent bags. 5. In a bag making machine, the combination of abottoming drum, means for temporarily attaching bag lengths to the periphery of said drum for bottoming while rotating therewith, a collecting station in the path of the bags, means for releasingthe bags successively for direct delivery to the collecting station as the leading end 'of each bag reaches said station, and means for misaligning a bag at regular intervals with respect to'the other bags.

6. In a bag making machine, the combination of a bottoming drum, means for temporarily attaching bag lengths to the peripheryv of said drum for bottoming and rotation therewith, a collecting station in the path of the bags as they are carried around by said drum, means for releasing the bags successively for direct positive delivery to the collecting station, and means for retaining the top of a bag of the collected bags at regular intervals raised above the tops of the other collected bags. I. In a bag making machine, the combination of bottoming mechanism, a collecting station, said bottoming mechanism positively delivering the bottomed bags directly to and stacking the same at the collecting station, and fingers cooperating with the bottoming mechanism and intermittently operable to efiect permanent misalignment of a stacked bag at predetermined intervals in the stack. v

8. A bag making machine, comprising in combination means for continuously advancing bag tubing, means for severing the tubing into bag lengths, mechanism for bottoming each bag length, a collecting station, said bottoming mechanism delivering the bags directly to the collecting station and positively stacking the same, and fingers adapted periodically to hold certain of the stacked bags out of alignment with the remainder of the stack until suflicient bags have been delivered by the bottoming mechanism behind said misaligned bag to hold the latter in such misaligned position. r

9. A bag making machine comprising in combination means for continuously advancing bag tubing, severing the tubing into bag lengths and for bottoming each bag length, a collecting station, said bottoming mechanism delivering the bags directly to the collecting station and stacking the same, fingers cooperable with said bottoming mechanism, and cam actuated means for controlling said fingers intermittently and momentarily to hold certain of the delivered bags out of alignment with the remainder of the stack.

10. A bag making machine comprising in combination tube severing means for severing bag tubing into bag lengths, cooperating pinch rollers, bottoming mechanism in the path of the bag lengths for bottoming the same, said pinch rollers and bottoming mechanism being movable as a unit toward and away from said severing means. 11. A bag making machine comprising in combination tube severing means for severing bag tubing into bag lengths, cooperating pinch rollers, bottoming mechanism in the path of the bag lengths for bottoming the same, a collecting station to which the completed bags are delivered directly bysaid bottoming mechanism, said pinch tion being movable as a unit toward and away from said severing means.

12. A bag making machine comprising "in combination tube severing meansfor severing bag tubing into bag lengths, cooperating pinch rollers,

a bottoming drum for receiving the bag lengths, a tucker plate engageable with each bag length and cooperable withsaid drum,'a paster bar for applying paste to the bag lengths, and a collecting station to which the completed bags are directly delivered by said bottoming drum, said pinch rollers, bottoming drum, tucker "plate, paster bar and collecting station being movable as a unit toward and away from said severing means. I

13. A bag making machine comprising in combination, tube severing means for severing bag tubing into bag lengths, cooperating pinch rollers, bottoming mechanism in the path of the bag lengths for bottoming the same, a collecting station to which the completed bags are directly delivered by'said bottoming mechanism, said pinch rollers, bottoming mechanism and-collecting station being mounted on a rack, and means for moving said rack toward and away from the sevrality of slots in its periphery, means for tucking the ends of the bag lengths into said slots, grippers for engaging the tucked end of the bag length to hold the same to the drum during part of the revolution of the drum, a collecting station, a cam for opening said grippers for the release of 1 the bags directly to said collecting station, fingers cooperating with said grippers, and a cam controlling said fingers in timed relation to the opening of said grippers momentarilyto hold certain of said bags out of alignment with the other collected bags. v i a 15. In a bag making machine, the combination of bottoming mechanism comprising arotating drum, grippers carried by said drum for attaching the bag lengths to said drum, an openingcam for said grippers, and an o'scillatable arm for automatically varying the setting of. said opening cam to efiect a variation in the release of the bags from said drum.

16. In a bag'making machine, the combination of bottoming mechanism comprising a rotating drum, grippers carried by said drum for gripping" bag lengths thereto, a cam for openingsaid grippers after the bottoming operation, and a cam controlled arm for automatically varying the setting of said opening cam.

said oscillatory cam whereby at predetermined intervals a bag will be misaligned with respect to the main portion of the collected bags.

-18. In a bag making machine, the combination of a rotatable bottoming drum, grippers carried by said drum for attaching bag. lengths thereto, a stationary cam for opening said grippersin the operation of attaching the bag lengths to the drum, an oscillatory cam for opening said grippersat different positions of said drum for the release of completed bags therefrom, av cam actuated arm for controllingsaid oscillatory cam, and cam-actuated means operating intermittently in timed relation with said oscillatory cam for cooperation with the released bags whereby at predetermined intervals a bag will be misaligned with respect to the remainder of the bags. :19. In a bag making machine, a bag collecting station, a bottoming drum for bottoming bags anddelivering the same directly to the bag collecting station, a rock shaft, an arm carried by said shaft, fingers carried by said arm and cooperable with the bags being collected, and a cam for rocking said shaft intermittently to raise and lower said fingers.

20. In a bag making machine, a bagcollecting station, a rock shaft, an arm carriedby said shaft, fingers carried by said arm, a cam for rocking said shaft to impart an'oscillatory motionto said arm periodically to raise and lower said fingers, said cam having a dwell portion for permitting said fingers to remain stationary while bags are being evenly collected, another portion of the cam efiecting actuation of said fingers into position to hold certain of the bags being collected out of alignment with the evenly stacked bags.

21. In a machine of the class described, a bag collecting station, a shaft, an arm carried by said shaft, fingers carried by said arm, a bell crank lever on said shaft, a cam for moving said arm to impart a rocking motion to said shaft and an oscillatory motion to said arm periodically to raise and lower said fingers, the dwell of said 'cam Y permittingsaid fingers'to remain inactive while bags are being evenly collected, another portion of said cam permitting of a movement of said fingers into engagement with. a bag being collected to hold the same out of alignment with the remainder of thecollected bags. Y

22. In a bag making machine, bottoming mechanism, a collecting station cooperatingtherewith,

a rock shaft, an arm carried by said shaft, fingers carried by saidarm, a cam for rocking said shaft to impart an oscillatory motion to said arm periodically .to raise and lower said fingers, a cam 'for releasing finished bags from said bottoming 17, 1 bag making machine, t combination I last mentioned cam whereby the fingers are of bottoming mechanism comprising a rotating drum, grippers carried by said drum' for attaching the bag lengths to the drum for the bottoming operation, a stationary cam for actuating said grippers initially into open position, an oscillatory cam for opening said grippers at predetermined positions of said drum for release of the bottomed bags from the drum, a cam actuated arm for controlling the position' of said oscillatory cam, a collecting station receiving the released bags directly from said drum, and cam controlled means operable in timed relation with the movement of adapted to engage the earliest released bag to hold the same out of alignment with the remainder of the bags. t I

23. In a bag making machine, a rotatable bottoming drum, bottoming stationson thepriphery of said drum, a rotatable tucker plate for tucking successive bag lengths into successive bottoming stations, saidtucker plate rotating at a 'higher speed than said bottoming ,drum and out of contact with the periphery of said drum intermediate adjacent bottoming stations.

' 24. In a bag makingmachine, a.rotatable bottoming drum, bottoming stations at the periphery of said drum, a rotatable tucker plate for tucking successive bag lengths into successive bottoming stations, said tucker plate making two revolutions between adjacent bottoming stations,

the periphery of said drum between adjacent bottoming stations being provided with accommodations for the tucker plate whereby contact of the tucker plate with the periphery of the drum between bottoming stations is avoided.

25. In a bag making machine; the combination of a pair of pinch rollers, a bottoming drum, a plurality of bottoming stations on said drum, a paster bar for applying paste to bag lengths as the same are advanced by said bottoming drum, and a tucker plate intermediate the pinch rollers and said paster bar and cooperating with said bottoming drum, and means for rotating said tucker plate, said tucker plate being overspeeded with respect to the pastor bar.

26. In a bag making machine, the combination of a pair of pinch rollers, a bottoming drum, a plurality of bottoming stations on said drum, a

paster bar for applying paste to bag lengths as,

the same are advanced by said bottoming drum,

' and a tucker plate intermediate'the pinch rollers on the periphery of said drum, a. tucker plate cooperating with. said bottoming stations, a past er bar for applying paste to bag lengths as the.

same are advanced by the bottoming drum, said tucker plate making two revolutions between adjacent bottoming stations, said paster bar making one revolution only between said bottoming stations.

28. In a bag making machine, the combination of a bottoming drum provided with bottoming stations, pinch rollers cooperating with said bottoming drum, and adjustable means for driving said pinch rollers whereby the same may be driven so as to make one half a revolution to each bottoming station or one revolution to each bottoming station. v

29. A bag making machine comprising in combination means for continuously advancing a tube, means in the path of said advancing tube for severing the tube into bag lengths, rotatable bottoming mechanism in the path of said advancing bag lengths for bottoming the same, grippers for temporarily attaching the bag lengths to said bottoming mechanism for bottoming and rotation therewith, a collecting station in the path of the bottomed bags, and gripper opening means operable as the leading end of each bag reaches the collecting station to release the bags directly and successively upon the collecting station.

30. In a bag making machine the combination of a bottoming drum, a collecting station immediatelyadjacent the periphery of said drum, grippers for temporarily attaching successive bag lengths to said drum for bottoming, an gripper opening means operable to open a gripper as the leading end of each bottomed bag reaches the col-, lecting station to release the bags dirctly and successively upon the collecting station.

31. In a bag making machine the combination of a bottoming drum, grippers for temporarily attaching bag lengths to the periphery of said drum for bottoming and rotation therewith, a horizontally disposed stacking table immediately adjacent the periphery of the bottoming drum, and gripper opening means for said grippers operable to open the grippers as the leading end of each bag reaches the stacking table, to deposit the bags on end successively upon said stacking table.

ADOLPH POTDEVIN.