US1585745A

US1585745A - Bag-tying machine

Info

Publication number: US1585745A
Application number: US19751A
Authority: US
Inventors: Julius H Wald
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-03-31
Filing date: 1925-03-31
Publication date: 1926-05-25
Anticipated expiration: 1943-05-25

Description

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May 25,1926.,

J. H. WALD BAG TYING MACHINE Filed March 51 J 1925 3 Sheets-Sheet 1 @j wf 3 Sheets-Sheet 2 L/L/aJ/ [49540 y /dfm//W-m+ g2 May 25 1926.

J H wALD BAG TYING MACHINE Filed March '51 l d! 0oz Zwak' May 25 1926.

J. H. WALD BAG TYING MACHINE Filed March 51 I 1925 3 Sheets-Sheet Patented May 25, 1926.

'UNITED STATES VJULIUS H. WALD, OF CHICAGO, ILLINOIS.

BAG-TYING MACHINE.

Application led March'l, l1925. Serial No. 19,751.

My invention relates to bag tying ma` chines.

One of the objects of my invention 1s to Y provide a machine for tying tea bags which plan view of parts shown in reciprocating shuttle holder;

Fig. 4 is a section on the line 4 1 of Fig.3;

Fig. 5 is a plan view of part of the intermittently movable conveyor which carries the bags;

Fig. 6 is a section on the line 6--6 of Fig. 5;

Fig. 'i' is an end view of Fig. 5;

Fig. 8 is a plan view of the shuttle or looper;

Fig. 9 is an edge view of the looper;

Fig. 10 is an elevational view of the reciprocating needle carriage and the rock arm for drawing up the loop;

F 1g. 11 1s a plan view showing the re-v ciprocable looper mechanism engaging the hag carrying conveyor;

Fi 12 is a view similar to Fig. 11 showingrt ie looper initially engaging the thread;

ig. 13 is a similar view showing the looper beginning to make the loop; and

Fig. 1-1 is asimilar view showing thc thread about to slip oil'. from the looper to complete the loop.

Referring to the drawings in detail, the laag tying machine shown comprises an intermittently' movable conveyor 10 provided with a series of bag carrying and neck gath-i ering devices 11 and a bag tying mechanism past which the bags are carried, comprising a reciprocable needle 12 which perforates the gathers at the neck of the bag and forces a loop of cord therethrough during the .stationary condition of the conveyor, an intermittently reciprocable loop placing mechanism 13 which catches hold of the thread after it has been forced through the neck of the ba@r by the needle and places a loop about the neck of the bag, this loo placing mechanism being reciprocable to rmg the axis of the shuttle in line with the neck of the bag during the'stationary condfion of the conveyor, and to move the loop placing mechanism out of the way of the conveyor after the loop has been completed to permit the further intermittent movement of the conveyor, means 14 for intermittently gripping the thread being fed to the needle, and means 15 acting on the thread between this gripping means and the needle for drawing the loop up about the neck of the bag.

'Ihe intermittently movable conveyor comprises a. pair of conveyor chains 16 which are intermittently driven' at the proper time by suitable mechanism (not shown).

Each bag carrying and neck gathering device 11 mounted on the conveyor comprises a grooved guide member 17 4extending transversely of the conveyor chains and a pair of neck closing and gathering jaws 18 reciproc'able in the transversely extending guide for squeezing the neck of the bag together and holding it during the tying operation. T hese closing jaws are controlled'in their sliding movement by means of suitable cams (not shown) acting on the follower members 19.

lVhen the bag carrying device is brought opposite the bag tying mechanism the cams l will vhave moved the closing jaws to the ,position shown in Fig. 11, in which position the neck of the bag will be gathered tightly in position for the needle to force a loop of thread therethrough.

The needle 12 which forces the loop of thread through the neck of the bag is mounted on a reciprocable needle block or carriage 2() which is intermittently reciprocated by means of a sprocket wheel 21 having a crank pin 22 which engages a cam groove 23 in the side of the needle carriage (Fig. l0). This sprocket wheel 21 is driven from the drive shaft 24 by means of a sprocket chain 25 and a sprocket 26 mounted on the drive shaft. The cam groove 23 is so shaped as to give a quick movement. to the needle carriage when the crank pin is travelling from 27 to 28 and `from 29 to 30, the other parts of the cam groove being arcuate so as to constitute a dwell,lcausing no movement of the needle carriage. The thread is drawn by the bag tying mechanism froma spring tension device 31 through. the intermittent gripping device 14 through a loop -32 in a light spring arm 33 and through an opening in an oscillatable rock arm 34 which acts to draw up the loop about the neck of the bag,

`as hereinafter described, through a groove 35 in the needle carriage to the eye of the needle, which brings the thread in a position to be operated on by the loop placing mechanism 13.

This loop placing mechanism comprises "a reciprocable looper carriage 36 which is intermittently reciprocated to bring the axis of the looper or shuttle 37 into-line with the neck of the bag for the looping operation during the stationary condition of the conveyor and is moved out of the way of the conveyor after the looping operation is performed to permit the step by step movement of the conveyor. This looper carriage 36 is moved back and forth by means of a tension springl 38 tending to `pull in one direction and a cam 39 mounted on the .drive shaft 24, which cam engages the roller follower 40 on the loo er carriage to move it against the action o the spring 38.

The looper or shuttle 37 shown in Figs. 8 and 9 is rotatably mounted in a circular seat or depression'4` in the looper carriage. The looper carriage' in its reciprocating movement moves the looper or shuttle into or out of driven relationship with respect to the vertical shuttle drive shaft 42. In order to hold theshuttle in place in the circular depression 41, a light leaf spring 43 is provided which engages the upper portion of the shuttle and holds it in place when it is out @of driven relationship with respect to the drive shaft 42.

The successive stages of the operation of the looper or shuttle are shown in Figs. 11, 12, 13 and 14. In Fig. 1l the looper carriage has been shifted so that the axls of the shuttle is in alinement with the neck of the bag, 'the looper carriage being provided with a pair of rollers 44 which straddlec'the slide 17 which carries the bag and ,snugly engage the edges therof to insure proper alinement of the shuttle with respect to the neck fof the bag. The shuttle drive shaftv 42 is intermittently driven as Will be eX- plained in detail hereinafter, and begins to rotate the shuttle after the shuttle has aligned itself With the neck of the bag. In Fig. 12 the shuttle has rotated somewhat from the position shown in Fig. 11 and is just beginning to pick up the thread 45 from the needle, the thread being received inthe notch 46 formed in the point of the 'loopen Fig. 13 shows the shuttle rotated still further r,and shows the 'looper beginning to Wrap the cord about the neck of the bag at 47. Fig. 14 shows the looper about tocompletethe looping operation, the cord being'wound about one-half way around the the drive shaft.'

lar is provided with a notch or depression shuttle and the drive shaft at this point in the operation by means of the loop tightening arm 34 on the needle carriageA which is operated at this vpoint to act on the cord between the intermittently acting cord grip 14 and the needle, as described in detail hereinafter.

-The drive shaft 42 for the shuttle drives the shuttle by means-of a sleeve or collar 49, splined to the shaft and having a'driving lug or projection 50 which engages a corresponding driving lug orprojeetion 51v on the shuttle. I'lhe drive collar 49 is held in accuratedriving relation with respect to the shuttle during the rotating movement of the shuttle by means of a fixed pin 52, which engages the upper shoulder of this driving collar and prevents its rising up on However, the drive col- 52a at the proper point, which comes opposite the fixed pin 52 after the shuttle has nished its rotating movement and this notch permits the drive collar to'yield up- Wardly to permity that partof the cord 45 which lies above the shuttle to slip easily between the upper face of the shuttle and the lower end of the drive shaft and drive collar. This vertical shuttle drive shaft is intermittently driven from the drive shaft i same shaft as the spiral gear, a pinion 56 intermittently driven from this mutilated gear 55, a shaft 57 on which this pinion is mounted, a bevel gear 58 mounted on thi` shaft 57 and a bevel gear 59 meshing with this bevel gear 58 and mounted on the vertical shuttle drive shaft 42.

The loop take-up arm 34 is pivotally mounted on the needle carriage by means of a pivot pin 60 and is controlled in its ocillating movement by means ot' a tension spring 61 urging it in one direction and a rock lever 62 which controls the spring actuated movement of the loop take-up lever. This rock lever 62 is pivoted on a fixed support 63 by means of a pivot screw (34 and is actuated by the movement of the `needle carriageA 20. When the needle carneedle carriage passes the shoulder 65 on the rock lever. This permits the tension v spring 61 to move the loop take-uplever 34 to the position shown `in Fig. 1. When vthe needle carriage starts to move to the left from the position shown in Fig. 1, the lefthand end of the rock lever 62 is at once forced upwardly, causing the right-hand end to move downwardly andl quickly move the loop ,take-up lever 34back to the position shown in Fig. 10, which causes the portion of the cordwhich lies above the shuttle to be drawn over the top of the shuttle between the shuttle and its drive shaft and then draws the loop up about the neck of the bag. yThe intermittent cord grip device 14 is caused to grip the cord, at the time the loop take-up operates, by means of an arm 66 mounted on the needle carriage 20 having a cam portion 67 which engages the side of gripping device 14 and forces the gripping disk 68 over toward the gripping disk 69 to cause the cord to be securely held between these grips. a

The gripping disk 68 is mounted on a yieldable arm 69, the tension in which is such as to normally permit the plate to be readily drawn between the clampingdisks 68 and 69. However, when the arm 66 moves forwardly thev cam portion '67 engages the side of the yieldable arm 69a and forces the gripping disk 68 toward the gripping disk 69 to hold the cord at this time.

In/order to provide av support or backing for the neck of the bag at the time the needle is forcing the cord therethrough, an intermittently operated lever 7 O is provided having a foot portion 71 which is brought up against the neck of the bag at just the right time to support it When the needle is forcing its Way through the bag. This rock lever is pivoted vat 72 on a bracket 73 controlled in its movement by a coil tension spring 74 urging itin one direction and a cam 7 5 mounted on a rotatable shaft 76, which, at the proper time, operates the lever against the action of this spring.

In operation, the conveyor is operated at intervals to bring the bags successively past the bag tying mechanism. The conveyor is brought to a stop with one of the bag carrying guide members 17 just opposite the needle carriage 2() and the loop placing mechanism 13.

36 is then reciprocated to bring the axis of the shuttle 37 directly underneath the axis of the shuttle drive shaft 42, the rollers 44 serving to accurately position the looper carriage with respect to the bag carrying device 11. The intermittently rotatable shaft 42 then lcauses a revolution of the shuttle 37, causing the point of the shuttle to catch the loop of thread from the needle 12 and place it around the neck of the bag. The needle carriage 20 is then Withdrawn, the first half of the Withdrawal causing the loop take-up arm 34 to act to draw the loop up about the neck of the bag.

The intermittent cord grip 14 holds the arm acts, to prevent the cord from feeding Y at this time.

In the claims Where theI expression axis of' the bag is used, it is, to be understood as meaning the longitudinal axis extending from top to bottom of the bag.

I claim:

1.. A bag tying machine for tying a bag having a gathered neck, the axis of which extends longitudinally of the bag comprising means for forcing a loop of corl through the gathers at the neck of the bag, and means for opening the loop and for placing the loop over the ends of the gathers and causing it to substantially completely encircle the neck of the bag and drawing the loop up about the neck.

2. A bag tying machine for tying a bag having a gathered neck, the axis of which extends longitudinally of the bag comprising a needle for forcing a loop of cord through the gathers at the neck of the bag, and means for opening the loop and for placing the loop over the ends of the gathers and causing it to substantially completely encircle the neckof the bag and drawing the loop up about the neck.

3. A bag tying machine for tying a bag having a gathered neck, the axis ot' which extends longitudinally of the bag comprising means for forcing ya loop' of cord through the gathers at the neck of the bag, and rotary means for opening the loop and for placing the loop over the ends of the gathers and causing it to substantially completely' encircle the neck of the bag and drawing the loop up about the neck.

4. 'A bag tying machine for tying as bag having a gathered neck, the axis of which extends longitudinally of the bag comprising a needle for `forcing a loop of cord through the gathers at the neck of the bag and rotary means for opening the loop and for placing the loop over/ the ends of the gathers and causing it to substantiallycon` pletely encircle the neck of the bag.

5. bag tying machine for tying a bag having a gathered neck, the axis 4of which extends longitudinally of the bag comprising a conveyor provided with a series of bag1 carrying and neck gathering devices and a bag tying mechanism past which the bags are carried, comprising a needle which -for placing the loop over the ends ofthe gathersand causing it to substantially completely encircle the neck of the bag.

6. A bag tying machine for tying a bag having a gathered neck, the axis of which extends longitudinally of the bag comprising means for gathering the bag at the neck, a needle which perforates the gathers of thebag and passes a loop of cord therethrough, and rot-ary means for opening thc loop and for placing the loop over the ends of the gathers and causing it to substantially completely encircle the neck of the 7. A; bag tying machine for tying a bag having a gathered neck, the axis oi' which extends longitudinally of the `bag comprising a conveyor provided with a series ofi bag carrying devices, a needle for passing Sa loop oir' cord through the neck of the bag, and rotary meansl for opening the loop and :tor placing the loop over the ends oi' the gathers and causing it to substantlally com-'- pletely encircle the neck of the bag.

8. A'bag tying machine `for tying a bag having a gathered neck, the axis of Which extends longitudinally of the bag comprising means' for passing a loop o cord through the gathers oi the neck of `the bag and intermittently rotatable means for opening the loop and for placing'the loop over the ends or' the gathers and causing it to substantially completely -encircle the neck of the bag.

9. A bag tying machine for tying a bag havin(r a gathered neck, the axis of, which extends longitudinally o the bag compris` ing an lintermittently movable conveyor provided with a -series of bag carrying and neck. gathering devices and a bag tying mechanism past which the bags are carried `comprising a needle Vwhich perforates the gathers and forces a loop of cord therethrough during the stationary condition of the conveyor and an intermittently reciprocable loop placing mechanism com rising an .intermittently rotatable looper, said loop placing mechanism being reciprocable to bring the axis of the looper in line with the axis ofthe neck of the bag during the stationary condition of the conveyor and to move the loop placing mechanism out of the way of the conveyor during the intermittent movement of the conveyor.

l0. A bag tying machine for tying a bag having a gathered neck, the axis of which extends longitudinally of the bag comprising an intermittently movable conveyor provided with a series ofybag carrying and neck gathering devices and a bag tying mechanism past which the bags are carried comprising a needle which perforates the gathers and forces a loop oi? cord therethrough during the stationary condition oi"- the conveyor and an. intermittently reciprocable loop placingfmechanism comprising an,intermittently rotatable looper, said loop `placing mechanism being reciprocablc to ring the axis of the looper in line with the axis of thel neck of the bag during the stationary conditiono'f the conveyor and to move thev loop placing mechanism out of the Way of the conveyor during theintermittent movement of the conveyor, and means for drawing the. loop up about the neck of the bag. c 4

11. A bag tymg machine for tying a ba having a gathered neck, the axis of whic extends longitudinally of the bag ycomprism provi ed with a series of bag carrying and neck gathering devices and a' bag tying mechanism past which the bags are carried comprising a needle which periorates the gathers and forces 'a loop of cord therethrough during the stationary condition of the conveyor and an intermittently reciprocable loop placing mechanism comprising. an intermittently rotatable looper, said loop placing mechanism being reciprocable to ring the axis of the looper in line with the axis of the neck of? the bag during the stationary condition oi the conveyor and. to move the loop placing mechanism out of the Way of the conveyor during the intermittent movement of the conveyor, means for gripping thev thread beingied to the needle, and means acting on the thread between the ipping means .and needle for drawing the oop u about the neck of the bag. A l 12. bag tying machine for tying a bag havin a gathered neck, the axis o which exten s longitudinally of the bag comprising an intermittently movable conveyor provided with a series of bag carrying and neck gathering devices land a bag tying mechanism past which the bags are carried comprising -a needle which perforates the gathers and' forces a loop of cord therethrough during the stationary condition of the conveyor and an intermittently reciprocable loop placing mechanism comprising an intermittently rotatable looper, said loop Aplacing mechanism being reciprocable to bring the axis of the looper. in line with the axis of the 'neck ofl the bag during the stationary condition of the conveyor an intermittently movable conveyor bill lil@

and to move the loop placing mechanism thread betvveen the gripping means and J needle for drawing the loop up about the neck of the bag.

13. A bag tying machine for tying a bag having a gathered neck, the axis of which extends longitudinally of the bag, comprising a conveyor provided with a series of bag carrying and neck gathering devices and a bag tying mechanism past which the bags are carrie comprising a needle which perforates the gathers at the neck of the bag and passes a loop of cord therethrough, and rotary means for opening the loop and for placing the loop over the ends ot' the gathers and causing it to substantially completely encircle the neck of the bag, said rotary meansv being coaxial with the bag o-perated on.

14. A bag closing machine comprising an intermittently movable bag carrying conveyor for carrying the bags in a direction transverse to their axes, means for gathering each bag to form a neck extending longitudinal of the axis of the bag, and a bag tying mechanism past which the bags arel carried comprising a needle which perforates the gathers at the neck of the bag and passes a loop of cord therethrough, and rotary means for opening the loop and for placing the loop over the ends of the gathers and causing it to substantially completely encircle the neck of the bag.

15. A bag closing machine comprising a bag carrying conveyor, a series of neck gathering devices mounted on said conveyor and a bag securing device past which the bags are successively carried by the conveyor, each neck gathering device comprising a guide extending transversely of thel line of movement of the conveyor, and a pair of jaws mounted in each of said guides to slide transversely of the line of movement of the conveyor.

16. A bag closing machine comprising a bag carrying conveyor, a series of neck gathering devices mounted on said conveyor and a bag securing device past which the bags are successively carried by the conveyor, each neck gathering device co1nprising a guide extending transversely of the line of movement of the conveyor, and a pair of jaws mounted in each of said guides to slide transversely of the line of movement of the conveyor, each jaw having a converging neck engaging portion, the c onverging portion of one jaw overlapping the converging portion of the other jaw as the jaws approach each other, whereby the neck of the bag is squeezed Atogether by the converging portions of both jaws.

In witness whereof, I have hereunto subscribed my name. y

JULIUS H. WALD.'