US2312729A - Bagmaking machine - Google Patents

Description

' Mmh2,-1943.

' A. PTDEVINA BAG MAKING MACHINE7 Filed Aug. s', 1946 4 Sheets-Sheet 1 INiTOR I y BAG MAKING MACHINE March 2; 1943.

A. Po'rnr-:vlN

BAG MAKING MACHINE Filed Aug. 3, 1940 4 Sheets-Sheet 3 A'TORNEY Patented Mar. 2, 1943 Adolph Potdevin, Garden City, N. Y.,fassignor to Potdevin MachinelCompany, Brooklyn/N. Y., .a corporation of New York Application August 3, I1940, Serial No. 350,299

Y8 Claims.

'-This invention relates to apparatus for the pasting, folding and pressing of bottoms of bag tubes in connection with drum delivery `and counting of the same, with particular reference to large bags such as those used for millineryand "l laundry trades and which have very little stiffness as compared with grocery bags, for example.

One of the Aobjects* of the invention is to provide a machine wherein the bottoms of the bag tubes are pasted, folded and pressed and delivered to a delivery drum where they are pulled positively into essentially a vertical position and remain stacked in this position, the bag at one end of the stack being in contact with the vperiphery of the delivery drum and conforming toZ it, while the other end of the stack is supported by a movable carriage. An accurate count of the bags is secured by misaligning one or more bags vertically at regular intervals, say, for example, at every twenty-fifth or iiftieth bag.

vThe material being handled may be tubed in any of the usual ways Well known to those skilled in the art of bag making, and for this reason that part of the apparatus has not been illustrated.

In the accompanying drawings:

Fig. 1 is a perspective view taken at the delivery side of the drum and slightly t one side thereof;

Fig. 2 is a similar View taken slightly at the other side of the delivery drum;

Fig. 3 is a side elevational View showing not only the delivery drum but the bottom pasting, folding' and pressing section;

Fig. 4 is an enlarged detail of the gear train Vfor driving the counting mechanism; and

Fig. 5 is a detail of one of the 'delivery drum grippers.

Referring t0 the drawings in detail: The bag tube which, as already stated, is fabricated in any of the well known commercial ways is transferred from the fabricating apparatus to the bottom folding, pasting and pressing unit A and from here to the rotary delivery drum 4 where it is grasped and held in place by one of the gripper bars with which this drum is provided. No attempt nas been made to illustrate the bottom folding, pasting and pressing unit in detail.

The drum 4 with the bag clamped to it by the gripper bar B rotates until a ro-ller 8 on an'arm Ill (Fig. 3) which is attached to the gripper bar rides onto the fixed cam I2. This causes the gripper bar, normally held closed by a spring I4 to open and release the bag directly before the bottom or leading end of `the bag is delivered to the table I6.

The -periphery ofthedrum isprovided -with "gears have thesame pitfcirdiameter.

circumferential grooves I8. Projecting #into these grooves are strippers .12B ,carried ;by;the; ta :ble I5. ,These strippers are .provided :fortpreventing the bags from continuing with4 thesd'el-ivvery drum d below the table t6.

The bags, therefore, .are delivered in an zesvsentially vertical position, vneatly .stacked and l'supported on. oneJ .side .by .thef'moving surface..:of

'the drum 4. The bags aresupporte-d on Atheoth er side by supports -22 which, asvvill .beiseenfro-m Fig. 3, 'are curved `to conformtothegeneral outline of an average stack of bags fThesesupports are mounted on a movable counterweighte'dacar- .riage 24. 'This carriage,aswillbe appreciated, :is `freetomove-away from the drumuflfasithelbags are delivered, and back toward thefdrum :ast-he operator removes thelbags.

It is desired, `in `accordance -with thisinvention, to have one :or more bags` project vertical-ly above the majority of :the bags at regularinter- Evals to facilitate counting.

In this connection, inasmuch as the -drumzLa-nd vtherefore-'the bag gripped thereto aretravelingsat high peripheralspeed,y the bag mustzbe released by the gripper bar at a point short kof the pointfat which thelmajority of the bagsare rcleased,must

be positivelystopped ina short interval.ofwtime Yillustrated in the drawings, making one revolu- -tion for levery fifty bags delivered. This speed reduction can be obtained byextens'ive compound `gearing or by the use of alvvorm and-"worm Wheel. It is vdesirable, however, vto' befable `t0 adjust ff-t'he position of the countingcamsz-andf-8--while the machine isrunning,- after-a change-has been made in machine speed, bag size `or paperquality. The speed-reducing gearing, therefore, asu/illustrated, comprises a gear-32 iixedl to theendlof the shaft 3E) remote from the counting cams.

Mounte'd'on the-same axis as gear but-f-xed voneV more' 4.tooth `than the "gear A-36 but' thetwo 38 designates a planetary gear meshing with the gears 32 and 36. The planetary gear revolves on a stud 40 mounted on a plate 42 which revolves about the shaft 30. Fixed to the hub of the plate 42 is a gear 44. Meshing with the gear 44 is a gear 46 on the hub of gear 48 which is mounted on stud 50. The gear 48 is driven by the drum gearl 52.

By changing the position of the stud 58 it is possible to mesh the gears 48 and 44 and gears 46 and 52, thus doubling the revolutions of the plate 42.

As the plate 42 rotates, causing the gear 38 t6 roll about the gear 36, the gear 32 and consequently the shaft 30 advance one tooth per revolution of the plate. Thus,'if the gear 36 shouldA have forty-nine teeth and the gear 32 fifty teethy in fty revolutions of the plate 42 the shaft 30 will have made one complete turn. With one revolution of the shaft 30 the counting cycle is completed.

The two cams 26 and 28 on the shaft 30 and heretofore referred to, control the motion of the counting mechanism. A follower 54 is fixed to stub shaft 56 which passes through the cam I2, the inner end of this stub shaft carrying a cam 58. The follower 54 is kept in contact with the cam 26 by a spring 60. The high section 62 (Fig. 3) of the cam 26 causes the follower 54 to move downward and rotate the cam 58 into such a position that it is an upward extension of the working surface of the cam I2.

64 designates a shaft extending transversely of themachine beneath the table I6. This shaft carries a follower 66 whose motion is controlled bythe profile of the cam 28. The follower is held against the cam by a spring 68.

Mounted on the shaft 64 about midway of the table I6 are arms 10 extending toward the drum 4, the free ends of these arms carrying pivotally mounted counting ngers 12. A spring 14 is secured to the tail of these ngers, and the normal position of the fingers is as shown in Fig. 1.

The cam follower 66 has an upwardly projecting tail 16 which is at about 90 to the follower, the free end of this tail being pivotally attached to one end of a rod 18. The other end of this rod passes through a stud 80 rotatively mounted on the end of an` arm 82. At each side of the drum 4 are blocks 84 and 86 constituting bearing blocks for a shaft 88, this shaft carrying two arms 90. i. lThe arms 90 overlie the surface of the drum 4 and the free end of each arm is provided with a block 92 having a high coecient of friction such as rubber, for example.

With the machine in operation it will be appar,- ent that as the cam 28 is rotated in a counterclockwise direction, as viewed in Fig. 3, through the gear train illustrated in Fig. 4, the follower 66 rises raising the fingers 12, these ngers, however, remaining in grooves 94 provided for that purpose in the periphery of the delivery drum 4. At the same time due to the movement of the follower 66 the blocks 92 carried by the arms 90v are raised as shown in Fig. 3 through the medium of the rod 18. While this action is taking place the high portion 62 of the cam 26 has moved the follower 54 downward so that cam 58 has become operative to open the clamp bar 6 to release the bag 2. l'

When the cam 28 has been rotated for a suflicient distance the follower 66 will drop from the high point 96 of the cam and the arms 10 on the shaft 64 will be moved upwardly quickly. Stop pins 98 limit this upward movement of the arms 10, but the fingers 12 are free to rotate about their pivotal attachment to the arms 10.

The upper ends of the fingers 12 project above 5 the surface of the drum 4 directly behind the leading edge of the bag which has been released from the clamp bar 6 by the action of the cam 58. The fingers 12 press the leading edge of the bag against the bag already delivered while the rubber blocks 92 hold back the trailing end of the bag. The result of all this is that the bag is delivered in such a position that it is misaligned vertically with respect to the majority of the bags delivered. It might be assumed by the l15y inexperienced that there is no necessity for the blocks 92, inasmuch as it would be expected that stopping the leading end of the bag would stop the bag. I have found, however, that on light papers and large bags, there is a tendency for the trailing end of the bag to follow the drum and fold under the main body of the bag. This action is effectually prevented by the blocks 92.

As the drum 4 continues to rotate the further rotaticn of the cams 26 and 28 allows the fingers 12 to be withdrawn into their initial position below the surface of the drum, the blocks 92 are raised, cam 58 becomes inoperative and the bags are delivered again in normal position. It is desirable to be able to adjust slightly the 30 position of the cams 26 and 28 with respect to the position of the gripper bars 6 while the machine is running. This is desirable for two reasons, partly because of the mechanical lag of the spring actuated parts which varies with the speed of the machine, and partly because of the varied surface quality of the paper used on the machine. The action of the blocks 92 depends upon friction so that it becomes desirable to have these blocks act at different times depending upon the surface quality of the various papers used. Re-

ferring to Fig. 4, it will be seen that the stub shaft 34 carrying the gear 36 is providedwith an arm |00 which is held against rotation by adjusting screws I02 and I 84. By manipulation of these screws the arm |00 is rotated in either direction rotatively to adjust the gear 36. This motion is transmitted through the planetary gear 38 to the gear 32 and consequently to the cams 26 and 28 which are on the same shaft. This adjustment can be made obviously with the machine at rest or in motion.

It is to be further understood that changes may be made in the details of construction and arrangement of parts herein described and illustrated without departing from the spirit and scope of the invention.

What I claim is:

1. In a bag making machine of the type wherein bags are gripped to a delivery drum for successive delivery, arresting means adaptedto be interposed in the path of an advancing bag at regular intervals to arrest the progress of the same, and means for simultaneously engaging the outer face of the arrested bag.

2. In a bag making machine of the type wherein the bags are successively advanced and delivered by a delivery drum, fingers automatically actuated periodically into the path of an advancing bag positively to arrest the progress of the same, friction means for engaging the outer face of the arrested bag adjacent its trailing end, and a cam for controlling the operation of said fingers and said friction means.

- 3. A machine of the class described, comprising in combination a delivery drum for advancing Vbags and delivering the same successively at a collecting station, a rod extending lengthwise of the drum, friction blocks carried thereby and ioverlying the drum, fingers adjacent the drum periphery and the collecting station, actuating means therefor for projecting the ngers intermittently into the path of the leading edge of a bag thereby to arrest the progress of the same, and a rod connecting said actuating means and the first mentioned rod whereby as the lingers are actuated the friction blocks will engage the face of the arrested bag adjacent the trailing end thereof.

4. A machine of the class described, comprising in combination a delivery drum for advancing bags and delivering the same successively at a collecting station, a rod extending lengthwise of the drum, friction blocks carried thereby and overlying the drum, fingers adjacent the drum periphery and the collecting station, actuating means therefor for projecting the ngers intermittently into the path of the leading edge of a bag thereby to arrest the progress of the same, and a rod connecting said actuating means and the flrst mentioned rod whereby as the fingers are actuated the friction blocks will engage the face of the arrested bag adjacent the trailing end thereof, said first mentioned rod being adjustable circumferentially of the drum to accommodate the machine to bags of different lengths.

5. In a bag making machine of the type wherein a delivery drum successively delivers the bags at a collecting station, arresting fingers for engaging the inner face of a bag at regular intervals adjacent the leading end of the bag to press the same outwardly away from the delivery drum against the immediately preceding delivered bag, actuating means for said fingers to actuate the same prior to the arrival of the engaged bag at the collecting station, friction blocks for engaging the opposite face of the same bag adjacent its trailing end and actuating means for said blocks operable to effect actuation of said blocks, simultaneously with the operation of said fingers.

6. In a bag making machine of the type wherein bags are successively advanced to and delivered at a delivery station by a rotating drum, arresting means comprising ngers adjacent the drum periphery, cam mechanism for intermittently moving said fingers to engage the rear face of a bag adjacent its leading end, and cam controlled ngers movable at the same time into frictional engagement with the outer face cf the same bag adjacent its trailing end, thereby to arrest the progress of the bag.

7. A bag making machine of the type wherein bags are successively delivered at a collecting station, normally retracted fingers automatically projected at regular intervals into engagement with the rear face of a bag adjacent its leading end prior to the leading end of the bag reaching the collecting station, and fingers adapted at the same time to engage the outer face of the same bag adjacent its trailing end, whereby the progress of the bag will be arrested short of the delivery station.

8. A bag making machine ofthe type wherein a rotating drum advances and delivers bags successively at a collecting station, `arresting means adapted to engage one face of a bag at regular intervals adjacent its leading end, actuating means for said arresting means adjustable while the machine is in motion to vary the time of operation of the sai-d arresting means, and friction fingers operable intermittently to engage the outer face of the bag adjacent its trailing end simultaneously with the operation of the arresting means, whereby the progress of the bag will be arrested short of the delivery station.

ADOLPH POTDEVIN.

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