US3721061A

US3721061A - Automatic bag neck gatherer and tying mechanism

Info

Publication number: US3721061A
Application number: US00152777A
Authority: US
Inventors: W Bodolay
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-06-14
Filing date: 1971-06-14
Publication date: 1973-03-20
Anticipated expiration: 1990-03-20

Abstract

This invention is concerned with the subject matter of placing a tie upon the neck of a bag that has previously been filled. The bags for which this particular device is designed are the type that utilize food stuffs, particularly popcorn, potato chips, apples, oranges, onions and the like. There is a source of tie wire which is free mounted. The wire is fed through certain tubes that are strategically located in designated areas. The wire that is pulled through the tubes is bent. One of the tubes is moveable and because the wire is bent, the wire can be pulled from its source through the fixed tube. There is a spinning type of knife which cuts off a segment of the wire. The cut off wire is then wrapped around the neck of the bag. The neck of the bag is squeezed together by the mechanism. There is a control circuit electrically operated for synchronizing the various function of the device. In the preferred embodiment, pneumatic cylinders are employed for actuating the mechanism. The device has been particularly designed to operate with a filled bag on the Bodolay bag making and feeding machine known as U.S. Pat. No. 2,877,609. There is a tying mechanism that takes the cut wire and wraps around the neck of the bag and the spinner mechanism twists it twice after the neck of the bag has been squeezed snugly together.

Description

United States Patent 91 Bodolay [111 3 721 1a rcli 20, 19

[ AUTOMATIC BAG NECK GATHERER AND TYING MECHANISM [76] Inventor: William A. Bodolay, l5 Fernglen Road, East Longmeadow, Mass. 01106 22 Filed: June 14,1971

21 Appl.No.: 152,777

[52] U.S. Cl. ..53/l35, 53/138 A [51] Int. Cl. ..B65b 7/12 [58] Field of Search ..53/l34, 135, 138 A; 29/335,

[56] References Cited UNITED STATES PATENTS 3,354,915 11/1967 Johnson et a1 ..53/l35 3,190,053 6/1965 Tobey ..53/l38 A Primary Examiner-Travis S. McGehee Assistant ExaminerJohn Sipos Attorney-Leonard S. Michelman [5 7] ABSTRACT This invention is concerned with the subject matter of placing a tie upon the neck of a bag that has previously been filled. The bags for which this particular device is designed are the type that utilize food stuffs, particularly popcorn, potato chips, apples, oranges, onions and the like. There is a source of tie wire which is free mounted. The wire is fed through certain tubes that are strategically located in designated areas. The wire that is pulled through the tubes is bent. One of the tubes is moveable and because the wire is bent, the wire can be pulled from its source through the fixed tube. There is a spinning type of knife which cuts off a segment of the wire. The cut off wire is then wrapped around the neck of the bag. The neck of the bag is squeezed together by the mechanism. There is a control circuit electrically operated for synchronizing the various function of the device. In the preferred embodiment, pneumatic cylinders are employed for actuating the mechanism. The device has been particularly designed to operate with a filled bag on the Bodolay bag making and feeding machine known as U.S. Pat. No. 2,877,609. There is a tying mechanism that takes the cut wire and wraps around the neck of the bag and the spinner mechanism twists it twice after the neck of the bag has been squeezed snugly together.

24 Claims, 1 1 Drawing Figures PATENTEUMmd 197a SHEET 2 [IF 7 whim AB @5111 [NVENTUR PATENTEDMARZO 1915 3,721,061 SHEETBOF 7' Willi-um A E! :1 t1 :1 luy INVENTU R PATENTEDMARZO I975 SHEET [1F 7 William AIE: m :1 uluy PATENIEDMARZO 197s SHEET 7 [1F 7 INVENTUH AUTOMATIC BAG NECK GATHERER AND TYING MECHANISM This invention is concerned with the packaging of items that require the tie of the package instead of stapling or sealing, particularly the type used with food, cereals, snacks and the like. For example, a typical type of package that is tied is popcorn, flaked chips, pretzels and the like.

Heretofore there have been many attempts to tie the package tightly and securely. The known methods have many faults and drawbacks.

It is particularly an object of the within invention to provide a device to tie instead of seal the type of package formed on a machine described in a patent of William A. Bodolay and Stephen M. Bodolay for a machine for making bags from a continuous web, US. Pat. No. 2,877,609. In the aforesaid patent, a continuous web of plastic material is folded and sealed and bags are formed therefrom. It was taught in the aforesaid patent that the top fold be sealed so that a rectangular shaped container is formed.

In the within disclosure the top seal shall not be used, but instead shall be replaced by the tie type arrangement of this invention herein.

A novel and unique device and arrangement of parts has been conceived and invented to make the tying arrangement on the aforesaid patented machine with the type of bag formed by this particular machine.

It is an object of the within invention to provide a uniformity of ties. The bag top is gathered and the twist tie is positioned while the bag is under complete control. The bag is firmly held until ejected as a tied package. This guarantees uniformity in mass production typing of each bag.

The material for the tie used in the disclosure herein is a typical plastic covered wire. The machine is so designed that paper covered wire may also be employed. The machine will not permit the tied wire, whether paper, or plastic covered, to jam the machine; so that when the next package comes into position to be tied, there can be no stoppage or interruption caused by a piece of the tie wire clogging, thus preventing the next package from being tied.

The device herein is adapted to be used with the aforesaid Bodolay patent No. 2,877,609 and, therefore, enables continuous operation. The bags are formed succeedingly and continuously. They are filled succeedingly and continuously. The tying operation takes place succeedingly and continually. The device eliminates several labor operations and is, therefore, extremely economical.

As a result of this invention, there is no longer a need to transfer the package from one machine to another as is done by others in the art.

Briefly, the within invention is accomplished by feeding the tie wire through certain tubes that are strategically located in a designated area. The wire is bent by a spinning knife. The spinning knife is off center so that there is a timing arrangement to give the wire an opportunity to be placed into position. A cylinder is synchronized with the timing of the machine so that it pushes a puller extension tube which contains the tie wire that is bent. Because the tie wire is bent, the said tube pulls the wire from its source through a feed tube and with the puller extension tube that is being pushed by the cylinder. The wire is, therefore, pulled by the feed tube to the tie looping head which in a sense is like threading a needle. As soon as the wire goes through this opening, there is a pull back; and because of the bend in the wire, the wire itself engages a loop by booking around the eye. The cylinder that pushed the tube now retracts and the wire remains in position, irrespective of the fact that the tube is pulled back over the wire. At this point in the cycle of the mechanism there is a length of wire threaded on the tie looping head. A second cylinder is strategically located and is energized. The second cylinder pushes the tie looping arm. The tie looping arm is mounted on a pivot and is somewhat circular in shape. It, therefore, moves the arm in a circular type of path causing the tie looping head to travel in a circular locus towards the feeder tube. At this point in the cycle there is a U loop over the neck of the bag with the tie material forming the U loop. The tie twisting head now commences to rotate. A separate transmission system operates the twisting head which twists the tie wire. This spins two complete revolutions and, therefore, puts two complete twists of the wire on the neck of the bag. The wire is cut by a knife which is located at a strategic position. It is also to be stated that there are devices to squeeze the neck of the bag prior to its being tied.

For a more detailed specification of this invention, reference is made to the detailed description and the accompanying drawings in which:

FIG. 1 is the top view of the tie feeder assembly.

FIG. 2 is the side elevational view of the tie twisting head.

FIG. 3 is a diagrammatic end view of FIG. 2.

FIG. 4 is a side elevation view of FIG. ll.

FIG. 5 is a side view in diagrammatic form of the bag formingmachine in its tying position.

FIG. 6 is a schematic diagram of the electrical control circuit for operating various components of the invention.

FIG. 7 is a schematic view of the pneumatic control circuit.

FIG. 8 is a combined top and side diagrammatic view showing the operation of the tying mechanism in its first position prior to the bag being gathered and tied.

FIG. 9 is a diagrammatic view similar to FIG. 9, but with the bag being partially gathered together, the gatherer mechanism moving into position just prior to the final squeezing together of the neck of the bag.

FIG. 10 is a diagrammatic view similar to FIGS. 9 and 10 but with the neck of the bag being fully squeezed together showing the parts of the mechanism that employs this function.

FIG. 11 is a diagrammatic view of the tied bag being released from the tie twisting head, showing the position of the tied bag before and after being released.

THE MECHANISM Reference is made to the drawings and in this instance, particularly FIG. 1. A tie looping arm 51 which is in the shape of a segment of a circle has at its far end a tie looping head 50 in which there is an opening adapted to receive the tie wire 62. The tie looping cylinder 52 is mounted at a strategic location as shown in FIG. 1 wherein its piston ram 51a is connected to tie looping arm 51 by a bearing pin 49. The tie looping arm 51 is mounted in the tie looping head fulcrum 68, which is mounted in the stationary support 67. The tie looping cylinder 52 is connected by a bracket on the cylinder support frame 61. The cylinder support frame 61 is secured to the main frame 48. The cylinder support frame 61 is secured to the main frame 48 (see FIG. 4) by the screws 61a. The tie wire 62 passes through a tube 63. Tube 63 has a slight bend in it and is stationary and is secured to the cylinder support frame 61 and passes through an opening therein. In the preferred embodiment the tube 63 is welded to the frame 61.

Tie puller cylinder 63a is also mounted in the cylinder support frame 61. Its piston ram 64a is connected to a tie puller cylinder connector 64. The tie puller cylinder connector 64 is connected to tie puller extension tube 66. The tie puller extension tube 66 is connected to the tie puller mounting head 65 which is secured to the aforesaid tie puller cylinder connector 64. The tie puller extension tube 66 passes through an opening in the tie bearing block 66a. Tie wire 62 can be seen in the view of FIG. 1 extending from the end of the tube 66. This area has been designated as 620. The bending of the tie wire 62 takes place in the area at 62a. Reference can be made to FIG. 3 to see this in more detail as this is a crucial point of the invention.

FIG. 1 discloses the extended position of tube 66 in dotted lines. This is not to be confused with the position of 66 before the operating cycle commences. Similarly there are dotted lines indicating the position of the bag ejector rod 59.

The bag ejector cylinder 60 is mounted through an opening in the cylinder support 61. The bag ejector tie shaft 69 is connected to the ram 60a of the cylinder 60. It is shown in dotted lines in its closed position and shown in its extended position in solid lines. The bag ejector rod 59 is connected to the bag ejector cylinder connector 69. The ejector rod 59 passes within the rotary knife actuating pinion 58 where there is a circular shaped tube or housing 57 circumscribing the ejector shaft 59. This can be seen clearly in the view of FIG. 2. The ejector shaft 59 passes through the tube 57 and through the tie twisting head 53. Head 53 has a hub 53a. Hub 53a acts as a mounting hub to enable head 53 to be mounted on the tube 57. The tie clamp finger 79 which has a configuration similar to the State of Idaho, is mounted by the screw 79a to the stationary support 67.

A fixed knife 54 which is made of hardened tool steel is secured permanently to the frame 48. There is an opening 54a within the knife 54. In FIG. 1 there can be seen another opening 81 above the opening 54a in the said knife 54. Mounted within the opening 81 is a bearing 80. The bearing 80 seats or supports the tube 57 which passes through the opening 81. Mounted on the tube 57 next to the opening 81 is the rotary cutting knife 55. There is a spring 56 which maintains a pressure on the rotating knife 55 so that it is in contact with the fixed knife 54. The spring 56 'circumscribes the tube 57. There is a snap ring 56a circumscribing the tube 57 which locks the spring 56 into position as shown in FIG. 1 in order to maintain the spring tension against the rotary knife 55 There is a dust cover plate 70 which can be seen in the view of FIG. 1 in part and segmented. A motor 71 is shown in cylindrical form. The motor 71 has a shaft 71a (see FIG. 4). Mounted on the shaft 71a are the

cams

72, 73 and 74. The

cams

72, 73 and 74 actuate micro switches which will be explained hereinafter. (See FIG. 6.) Each of these

cams

72, 73 and 74 are mounted on the shaft 710 as shown in FIG. 4. Mounted on shaft 710 is a segment gear 75 which is part of the transmission system for operating the twister 53.

Reference is now made to FIG. 5 which shows the principle of the Bodolay patent referred to previously. The continuous source of the film or web is at 88. The web 88 is fed through a pulley arrangement and is folded into a double layer at the folding station 98.

The web 88 moves in the direction of the arrow 91. The seal is formed at 96 creating the bag edges. The filling station is shown at 92. The finished bag is at 86. Trim 90 which is the cut off wasted film or web is shown in the view of FIG. 5. The entire assembly shown in FIG. 1 and FIG. 4 is indicated by the numeral 94 in the view of FIG. 5. From this view it can be seen that the tying assembly of this invention is located at the last station in the Bodolay machine.

FIGS. 8, 9 and 10 show the tying mechanism in its various stages of its cycle of operation. Before explaining the operation, reference is made to the elements themselves.

The folded web 77, shown in the views aforesaid of FIGS. 8, 9 and 10, can be seen as a thin line in FIG. 10 because the views are both looking down on it in one direction, and looking at it in a vertical elevation at the same time. Printed on the web are the electric eye spots 93. These spots 93 are employed for pre-printed film registration which is not part of this disclosure.

A bag 86 can be seen in each of these views in various positions. The neck of the bag is also in various positions. The tie wire 76 is shown in the view of FIG. 10. The bag gatherer 87 is in the shape of an inverted vertex at one end for catching the ends of the film so as to gather it. The side view of the gatherer 87 appears to be U shaped. It is, therefore, bifurcated and each of the arm members are symmetrical in shape as seen from looking down on it in the upper portion of the various views in FIGS. 8, 9and 10.

THE ELECTRICAL CONTROL CIRCUIT Reference is made now to the view of FIG. 6.

FIG. 6 is an electrical diagram which controls the operation of the various parts. There is a voltage source 43 which is connected across the

input terminals

38 and 39. It is contemplated in the embodiment shown that -l20 volts of alternating current will be employed. An electrical conductor 40 connects one side of the on-off switch 47 with one side of the input terminal 39. The other side of the on-ofi switch 47 is connected to a junction 44. The junction 44 has an electrical conductor 45 leading downwardly in FIG. 6 and also a conductor 29 leading directly away from the onoff switch 47. Conductor line 29 is in circuit with a normally open micro-switch 46. (Micro-switch 46 has not been shown heretofore. Micro-switch 46 is located on the Bodolay machine cam shaft. Reference is made to the aforesaid Bodolay U.S. Pat. No. 2,877,609 in which FIG. 26 shows the cam shaft 31.) Micro-switch 46 is normally in an open position. The cam shaft aforesaid on the Bodolay machine U.S. Pat. No. 2,877,609 is running as the bags are formed and causes microswitch 46 to close, which now closes the circuit through the electrical conductor 42 to the motor 71. The motor 71 is connected to a return 41 which connects with the other side of the input circuit at 38, and, of course, begins to operate.

Also at the junction 44 is the electrical conductor 45 which is connected in parallel to a plurality of

microswitches

72a, 73a, and 74a. These

micro switches

72a, 73a, and 74a are mounted on the earns 72, 73 and 74 in the view of FIG. 4, respectively. The shaft 71a reaches a predetermined position and the normally

open microswitches

72a, 73a and 74a will close. When 72a closes, it connects an electrical circuit also to the motor 71 and through the return conductor 41 to the input source at 38. When the micro-switch 73a closes, it connects with a bank of

parallel solenoid valves

52b and 52c. The

solenoid valves

52b and 520 control a pneumatic valve 52 as will be explained hereinafter. The electrical circuit is closed between 52b and 52c by the conductor 37 which connects with the source at 38.

Similarly, when micro-switch 74a is closed, it connects the electrical source with a parallel bank of solenoid valves 60-630 and 60-631; which are connected with the return conduit 41 by the electrical line 36 to the input source at 38. The solenoid valves 60-63a and 60-63b operate the pneumatic cylinders 60 and 63 as will be explained hereinafter.

THE OPERATION In operation, the on-off switch 47 has to be closed. This, as previously stated, closes the circuit through the micro-switch 46 which is operating the machine itself. When the bags have been completed on the machine, the micro-switch 46 closes. It closes only momentarily and, therefore, pulses so that the motor 71 starts to operate, which operates the cam 72 upon which microswitch 72a is located causing micro-switch 72a to close and to maintain the motor 71 in circuit and operating. This is for one cycle or revolution.

Cam 73 next operates micro-switch 73a which energizes the

solenoid valves

52b and 52c. The

solenoid valves

52b and 52c operate the pneumatic cylinder 52. The pneumatic cylinder 52 now controls the mechanical operation of the parts disclosed in FIG. 1 and shown in different stages of operation in the views of FIGS 8, 9 and 10. The pneumatic valve,52-actually is the bag folder and gatherer pneumatic cylinder because it controls the operation of both parts that control the gatheringof the bag and the folding of the bag. There are many functions taking place simultaneously. The various functions will be explained with the understanding that they are operating almost simultaneously.

Pneumatic cylinder 52 forces the tie loop arm 51 to move in the position of the dotted line shown in FIG. 1. As the tie loop arm 51 is moved to the position shown in the dotted line, it causes the neck of the bag to close together as can be seen in the view of FIG. 10. Reference is made to the position of the bag 86 and the top thereof in FIG. 10. Tie looping cylinder 52 remains the position shown in the view of FIG. 10.

Motor 71 continues to be energized and rotates cam shaft 71a so that the twister driving gear 75 imparts rotary motion to the rotary knife actuating pinion 58, which rotates the rotary knife operating tube 57, which rotates the knife 55 as well as the tie twisting head 53. Knife 55, as it rotates, cuts the tie wire 62; and the tie twister 53 takes the remaining wire 76 and twists it around the bag as shown in the view of FIG. 10. There are two complete revolutions of the twist of the wire 76 made around the neck of the bag. At the same time head 53 is spinning, the knife 55, because it is eccentric (mounted off center) bends the trunk of the tie wire 62 down on the tube 66 as shown in the view of FIG. 3 at 62a.

Cam shaft 71a continues to rotate. The tie looping cylinder 52 retracts, causing the tie looping arm 51 to return to its original position. It is to be reminded that there is a segmented gear 75. Cam shaft 71a continues to turn. The segmented continues to turn but does not mesh because of the lack of teeth on its surface with the pinion 58. (See the view of FIG. 4.) At this moment cam 74 is actuating micro-switch 74a, causing the solenoid valves 60-63a and 60-63b to operate. (See FIG. 6.) When valves 60-63 and 60-63b are operating, cylinders 60 and 63a are actuated. Cylinder 60 operates its ram 600. It is to be noted that in the operation of valve 60, the ram 60a retracts rather than extends. This causes the bag ejector rod 59 to move in the same direction towards the spring 56 and the spinner 53. (See FIG. 1.) The bag ejector rod 59 is pushed by the ram 60a all the way out through the opening in the tie twisting head 53 (see FIG. 3) to the dotted line position shown in the view of FIG. 1. This movement of rod 59 causes the neck of the bag, which has been tied, to be released from the head 53 as shown in FIG. I l.

While the bag ejector rod 59 is passing through the opening 57 in the tie twisting head 53 (see FIG. 3) and removing the tied bag 86 from the tie twisting head 53, the cylinder 63a is also operating. In this instance, the ram of 63a which is referred to as 64a pushes the tie puller extension tube 66 in the same direction as the ejector rod 59 is being pushed. This is done, of course, because the tie puller tube 66 is mechanically connected to the ram 64a by the tie puller connector 64.

As previously stated, because the wire 62 is bent at 620, as can be seen in the view of FIG. 3, when the tube 66 is pushed in the direction of the arrows, the wire 62 will also be pulled because of the bend. While not shown, the supply of wire 62 is mounted on a free pulley so that it permits the pull of wire 62 without any drag. Movement of the tube 66 pulls the wire 62 and inserts it into and through the opening 540 in the knife 54. The bend at 62a is even more bent as it is passed through the opening 54a. The tube 66 continues to pull the wire 62 out through an opening 50a in the tie looping head 50 to the position of the dotted lines'shown as 66.

As soon as the tube 66 reaches the position shown in the dotted lines (FIG. 1), the cylinder 63a retracts, causing its ram 64a to withdraw and also to withdraw the tube 66. As the tube 66 returns to it original position, the bent wire 62 at 62a catches on the tie looping head 50 and will not retract through the opening 50a in the tie looping head 50 and will remain stationary. The wire is now in position to be placed around the neck of a bag as previously described.

One complete cycle of operation has now been explained. As each bag is formed on the machine of FIG. 5, the cycle continues for each bag as described.

When the next bag is placed in a position and ready to have the tie wire twisted about its neck, the teeth that are on the segmented gear 75 remesh with the pinion 58. This, of course, imparts rotary motion to the tube 57 which operates against the spring 56, and causes the head 53 to start spinning and the cycle is again repeated. It is part of the design of the cam 72 that when the wire has been pulled through the head opening 50a and left engaged at the head 50 and has retracted, the switch controlled by the cam 72 will automatically be pushed open because of the contour of the surface of cam 72 in preparation for the next cycle. When switch 72a is open, the motor 71, again, will stop. (See FIG. 6.)

I claim:

1. An automatic device for tying the neck of a bag after said bag has been filled comprising a means for feeding a tie wire, means for putting a bend in the wire, means for cutting the wire into a segment, means for squeezing the neck of a bag, means for tying the cut segment of wire around the neck of the bag, and means for ejecting the tied bag, said means for feeding the tie wire comprising a source of wire, a fixed tube, said wire being located within said fixed tube, a means having a movable arm, a movable tube proximate said fixed tube, means for connecting said movable arm to said movable tube, said wire in said movable tube whereby when said arm moves, said tube moves and pulls said wire into a position in order to be cut by said cutting means.

2. An automatic device for tying the neck of a bag as described in claim 1 wherein the means for cutting the wire comprises a cam, means for connecting said cam to said motor, a rotary knife operating tube, a gear means operated by said cam, said gear means imparting rotary motion to said rotary knife operating tube, a rotary knife for cutting the wire, said rotary operating tube connected to said knife whereby as said tube rotates, said knife rotates and the wire is cut.

3. An automatic device for tying the neck of a bag as described in claim 1 wherein the means for squeezing the neck of the bag comprises a means for holding the bag in a fixed position, a bag gatherer, said bag gatherer having means for gathering a portion of the neck of the bag, means for imparting motion to the bag gatherer, whereby the the neck of the bag is pushed against the said means for holding the bag in a fixed position.

4. An automatic device for tying the neck ofa bag as described in claim 1 wherein the means for squeezing the neck of the bag comprises a first means for exerting backward pressure on said bag, and a second means for exerting forward pressure on said bag whereby the neck of said bag is squeezed together.

5. An automatic device for tying the neck of a bag as described in claim 2 wherein the means for squeezing the neck of the bag comprises a means for holding the bag in a fixed position, a bag gatherer, said bag gatherer having means for gathering a portion of the neck of the bag, means for imparting motion to the bag gatherer, whereby the neck of the bag is pushed against the said means for holding the bag in a fixed position.

6. An automatic device for tying the neck of a bag as described in claim 3 wherein the means for squeezing the neck of the bag comprises a first means for exerting backward pressure on said bag, and a second means for exerting forward pressure on said bag whereby the neck of said bag is squeezed together.

7. An automatic device for tying the neck of a bag as described in claim 1 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

8. An automatic device for tying the neck of a bag as described in claim 2 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

9. An automatic device for tying the neck of a bag as described in claim 3 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

10. An automatic device for tying the neck of a bag as described in claim 4 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

11. An automatic device for tying the neck of a bag as described in claim 5 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

12. An automatic device for tying the neck of a bag as described in claim 6 wherein the means for ejecting the tied bag comprises a rod means, means for imparting forward and backward motion to the rod means, a wire twisting means, means for aligning said rod means within the wire twisting means whereby upon forward motion, said rod means pushes through the wire twisting means, the tied neck of the bag out from the bag gatherer, and upon backward motion, returns to its normal position.

13. An automatic device for tying the neck of a bag as described in claim 1 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

14. An automatic device for tying the neck of a bag as described in claim 2 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

15. An automatic device for tying the neck of a bag as described in claim 3 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a

means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

16. An automatic device for tying the neck of a bag as described in claim 4 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

17. An automatic device for tying the neck of a bag as described in claim 5 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

18. An automatic device for tying the neck of a bag as described in claim 6 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

lit)

19. An automatic device for tying the neck of a bag as described in claim 7 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

20. An automatic device for tying the neck of a bag as described in claim 8 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

21. An automatic device for tying the neck of a bag as described in claim 9 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

22. An automatic device for tying the neck of a bag as described in claim 10 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tubes 23. An automatic device for tying the neck of a ba as described in claim 11 ll wherein the means for putting a bendin the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

M. An automatic device for tying the neck of a bag as described in claim 12 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube i i k

Claims

4. An automatic device for tying the neck of a bag as described in claim 1 wherein the means for squeezing the neck of the bag comprises a first means for exerting backward pressure on said bag, and a second means for exerting forward pressure on said bag whereby the neck of said bag is squeezed together.

15. An automatic device for tying the neck of a bag as described in claim 3 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

22. An automatic device for tying the neck of a bag as described in claim 10 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

23. An automatic device for tying the neck of a bag as described in claim 11 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends said wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.

24. An automatic device for tying the neck of a bag as described in claim 12 wherein the means for putting a bend in the wire comprises a tube means, said wire being located within the tube means, means for imparting forward and rearward motion to said tube means, a means for imparting pressure at the forward mouth of the tube whereby when said wire extends from the mouth of the tube, said means for imparting pressure bends wire from the axis of said tube, whereby when said tube is moved forward, the wire therewithin is pulled with the movement of the tube.