US2144729A - Apparatus for forming tying strips and applying the same to bags - Google Patents

Description

3m. 24, 1939. A. POTDEVIN ,7

APPARATUS FOR FORMING'TYING STRIPS AND APPLYING THE SAME TO BMW Original Filed May 3, 1937 5 Sheets-Sheet 1 INVENTOR' ATTORN EY Jane 24; iggg POTDEVIN 2,144,72

APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME TO BAGS Original Filed May 3, 1957 5 Sheets-Sheet INVENTQR BY MM ATTORNEY A. POTDEVIN 2,144,729

APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME TO BAGS Original Filed May 3, 1937 3 Sheets-Sheet 3 INVENTOR E ATTGRNEYS Patented Jan. 24, 1939 arcane STATES Arena" APPARATUS FOR FORMING TYING STRIPS AND APPLYING THE SAME TO BAGS Adolph Potdevin, Garden City, N. Y., assignor to Potdevin Machine Company, Brooklyn, N. Y., a corporation of New York 11 Claims. (Cl. 271-4) This invention relates to improvements in mathe paper tape being folded about the metal chines for making bags and is particularly directed to an improved device for applying a metal tie strip to the end of bags of the type known commercially as metal tie bags.

This application is a division of my copending application Serial No. 140,436, filed May 3, 1937, andis directed more specifically to a device of the character indicated having novel feeding means for the blanks in the making of such bags as above referred to.

In making metal tie bags a small strip of metal extending transversely of the bag is applied to the open end of the bag and when the bag is to be closed the strip and bag end are rolled over upon the bag several times and the projecting ends of the tie strip are bent over the bag body to hold the bag closed.

It is an object of the present invention to prostrip as the two progress through the machine.

The supply bags 2 are stacked at the magazine l on a table or bed it. lie transversely of the machine and are fed forward lengthwise successively from the bottom of the stack with the bag bottom in the lead, into position to be picked up by the forwarding mechanism which forwards the bags laterally toward the discharge end of the machine.

The magazine table or bed is provided with adjustable corners ll, the corners ill at the bottom end of the bags being provided with lugs for supporting this end of the bags. of bags disposed on this table the flap 29 of the lowermost bag of the stack will sag downwardly through the opening it in the table, as seen in Figs. 2 and 3.

Beneath the magazine table or bed it is a pair With a stack The bags in the stack vide a machine which is full automatic in its o wa d jaws, de i nated 22 a d The operation and is adapted to form the tie strips l 22 affiXed 130 an arm 25, the j and arm and to apply the same to the bag in continuous being p d 011 a Stud 'The j w is a operation. However, the present application is fixed arm 39 0 pivoted 011 the u 23 Which more specifically directed to the novel means is carried n the fr nd f a lev 3 piv te 25 for withdrawing bags from the bottom of a stack intermediate s ends on haft 25 of bags and means for moving the bags laterally The free end of the arm 25 Carrying the j toward the discharge end of the machine 22 is provided with a cam follower 36, the free In the accompanying drawingsIhave illustratend of the arm 33 the J' 24 W 3, Cam ed the machine of the present i v ti follower 38 and the free end of lever 32 with a 30 In the drawings: cam follower 49. The cam follower 3t cooper- 30 Fi 1 i plan i of the machine; ates with a cam :22 and the cam follower 38 co- Fig 2 is View Showing the charging end f operates with a cam M. Both of these cams the machine in ekvation; are mounted on the shaft 3d. The cam follower Fig. 3 is a part sectional elevational view of g i zf a}? On 3 d th 35 thecam mechanism by which the bags to which varioiis iis hr i trolli ng t lfe sa $11536 de 0 2252 3 322 be apphed are fed forward scribed in detail hereinafter, but at this point I 4 f th 13 f h would like to say that this mechanism is so art 15 i 0 e,same P 0 t m ranged that at the proper time the jaws 22 and chine but with the parts in a different position; 24 will close upon the flap 25 at the bottom end 40 of the lowermost bag in the stack of bags and 5 1S a Sectlon on lme of move the bag forward sufficiently to be picked up Referring to the drawings in detail! 2 desigby" the rollers 5i) which are mounted to rotate hates the bags to Which tie Strips are to be 4 about axes extending lengthwise of the machine. 45

plied. The bags are taken from a magazine 4 located at the charging end of the machine and passed through the machine continuously While traveling laterally. During the advance of the bags a metal strip 6 enclosed in paper tape 8 and constituting the tie strip is applied to the projecting flap H3 which is provided for this purpose at the open end of each bag.

The metal tape 6 and the paper tape 8 are taken from supply spools i2 and M, respectively,

The arm 32 has four motions. First it moves forward with the jaws 22 and 25% open to grip the bag. It then moves away from the feed rollers 58 pulling the bottom end of the gripped bag off its support. rying the bag to the feed rollers, the jaws open and the assembly returns to starting position.

The forwarding rollers 50 forward each bag crosswise of the machine toward a table or bed 52. This table 52 is provided with a side plate The arm then moves forward car- 5 56 and an end plate 58 for promoting proper positioning of the bags. These plates are adjustable so as to accommodate the machine to bags of different lengths as well as to bags of different widths.

As each bag is being fed forward toward the table or bed 52 plate 6-0 which is being reciprocated transversely to the bag motion is returning under plate 56, and when the plate 68 has moved under 56 the bag drops to table 52 to be pushed by the downwardly bent flange 6;. on the plate 60 to forwarding rollers 66. The rollers 65 deliver the bags between upper and low r forwarding chains designated 68 and i6, respectively.

Reverting to the pusher mechanism by which the bags are pushed from the table 52 it will be seen that webs I2 are secured to the underside of the pusher plate 60. These webs are carried by a plate I4 mounted on rails l6 extending lengthwise of the machine. Secured to the plate 5 5 is a short link I8 pivoted to the plate at 30, this link being pivotally attached to a lever carried by shaft 84. The shaft 64 also carries crank arm 86 pivotally connected to connecting rod 66, the free end of which is attached to crank disc 90. The connection of the connecting rod 88 to the crank arm 86 is adjustable so that the throw of the arm or lever 82 and hence throw of the pusher 60 may be adjusted to accommodate bags of different widths.

The driving motor for the machine is designated 94. This motor, through a sprocket and chain drive, drives a pinion 95 meshing with a spur gear 98 mounted on a stub shaft which carries a gear I00. The gear Iiiil meshes with gear I02 mounted on shaft 564 carrying pinion I06, the latter meshing with a pinion IE8 in mesh with a pinion II 0 on shaft I I2. The latter extends longitudinally of the machine toward the charging end thereof where the shaft terminates. This end of the shaft carries a gear H3 meshing with wide faced gear I I4, the gear H4 meshing with a gear II6 on the shaft 34 carrying the cams 42 and 44. The opposite end of this cam shaft 34 carries a gear H8 meshing with gear I20 in mesh with gear I22 on the shaft carrying the lower roller of the two forwarding rollers 50, this shaft carrying a gear I23 in mesh with gear I28 on the shaft of the upper rollers of the forwarding rollers 50.

This provides a drive for the forwarding rollers 50 and for the cams 42 and 44.

Below the cam shaft 34 is the cam shaft 48 carrying the cam 46 and this shaft is also driven off the gear II8 through gear Ific. The shaft m carries bevel gear I32 meshing with bevel gear I34 on the shaft I36 carrying the crank 90.

It is to be noted that the grippers and their controlling earns, the forwarding rollers Eli], and the gear trains for driving the cams and forwarding rollers, as well as the crank for driving the pusher 60 can be adjusted transversely of the machine by hand wheel I3I.

The drive for the forwarding chains and i6 is from a pinion I38 on the stub shaft Hi4, gears I40, I42, I44, bevel gears I46 and I48 which drives shaft I50 carrying the sprocket for the lower chain I0. This shaft I50 carries gear I 52 meshing with gear I54 on the shaft I56 carrying the upper chain 68. This gear train will drive the lower lead of the chain 68 and the upper lead of the chain I0 in the same direction toward the delivery end of the machine.

The bags are gripped between the upper lead of the lower chain I0 and the lower lead of the upper chain 68 as more fully shown and described in my copending application Serial No. 140,436. This provides for gripping the bags so as in effect to attach the bags successively to the forwarding chains for advancement.

As above stated the metal tape 6 forming part of the tie strip is taken from the supply reel I2. This reel lies beneath the machine and the tape is drawn upwardly to the machine bed and then forward toward the discharge end of the machine by feed rolls I66. The roll I2 is equipped with suitable retarding mechanism Hi? to prevent overrunning. The metal tape as it is drawn upwardly passes about guide rolls H2, I74, I16, H8, I80, I6i, I62 and roller I84 which is carried on the same shaft lBfi as the idler sprockets I88 for the lower chain E8.

The paper tape 8 which is taken from the reel Id and which is to enclose the metal tape 6 before the latter is placed in position on the bags 2 is also forwarded by the feed rollers I56.

This tape passes from the reel I4 about guiding and tensioning rollers (not shown), then between roller I92 and gluing roller I93 where three stripes of adhesive are continuously applied to the face of the tape as more fully shown and described in my copending application Serial No. 146436.

The paper next passes about the rollers I80, IBI and IE2, previously referred to. The roller 23?! is so shaped that as the paper tape passes the same one edge of the tape will be turned inwardly over and upon the metal tape 6 to bring one of the adhesive stripes into engagement with the face of the metal tape. As the paper tape and metal tape continue their forward movement another stripe adhesive i538 applied to the turned-over part of the tape.

The paper tape then passes over the roller I84 and the two tapes from thence travel lengthwise of the machine beneath the projecting flap I 0 of the bags 2, the adhesive stripe I98 contacting the underside of the flap.

As the paper and metal. tapes together with the bags travel lengthwise of the machine they pass a plate 204 which deflects that portion of the paper tape carrying the adhesive stripe I94 over upon the upper face of the flap 50 of the bags. The tapes and bags then pass beneath a hinged plate 208, to the pair of feed rollers I66 which press the tapes and bags together.

The tie strip is continuous, as will be understood, and after it has passed the rollers I65 it is cut off between adjacent bags 2 by a cutter bar 2I4. chains 68 and I0 continue the lateral advance of each bag with tie strip attached until the same is picked up by discharge rollers 2I6 by which the bags are successively discharged into a receiving trough M8. The discharge rollers 2I6 are geared together and are driven off the gear I54.

The feed roller I 65 and its cooperating roller are driven off the gear I52 through intermediate gear and gears I55.

The shaft which. carries the sprocket for one end of the lower forwarding chain "IQ is provided with a gear moshing 'th a pinion which in turn meshes with another pinion on the s-.aft of the lower of forwarding rollers 66, and is suitably geared to the shaft of the upper pair of forwarding rollers as fully shown and descibed in my copendlng application Serial No. 140,436.

The drive for the adhesive-applying roller I 93,

After the tie strip has been severed the r chine so constructed and arranged that bags are Which constitutes no part of the invention of the present application, is also fully described and illustrated in my copending application Serial No. 140,436 of which the present application is a division.

For purposes of threading the machine initiali the roller 5 82 which cooperates with the adhesiveapplying disc lad is mounted on a pivoted arm 2% to which is attached an arm 2-1 2. This arm is provided with a notch 2 3d adapted to engage shaft which mounts the roller 82. By lifting up the roller 592 and engaging the notch 22% v tl the shaft 2% the roller #92 cooperative relation with th disc 93.

It will be seen from all of the foregoing that the present invention provides an automatic m w continuously taken from a supply stack and for warded laterally through the machine. At the same time paper tape and metal tape are co ime ously fed lengthwise through the machine in superimposed relation to each other, adhesive be on the open end of the bag with the ends of the tying strip projecting a short distance beyond the sides of the bag.

It is to be understood that the details of construction and arrangement of parts herein shown and described may be varied Without departing from the spirit and scope of my invention.

What I claim is:-

l. A machine of the class described comprising in combination, means for successively withdrawlaterally, forwarding rollers receiving the bags from said pusher, and a pair of superimposed chains receiving the bags from said rollers to be gripped therebetween thereby to continue the lateral movement of the bags toward the discharge end of the machine.

2. A machine of the class described comprising in combination, cam-controlled grippers for automatically gripping the bottomed end of the lower bag of a stack of bags, a pair of forwarding rollers, a cam for pivoting said grippers to effect delivery of the gripped bag to said roliers, a reciprocating pusher for engaging each bag as it is released by the said forwarding rollers, a second pair of forwarding rollers for receiving each bag from the pusher, forwarding chains for continuing the advance of the bags to the discharge end of the machine.

3. A machine of the class described comprising a pair of grippers for automatically withdrawing successively the lowermost bag from a bag stack, a pivot for the jaws of said grippers, a cam for pivoting each gripper jaw, a pivoted carrying said grippers, and a cam for bodily pivoting the grippers, whereby the grippers are caused to move into and out of operative position with respect to the bag stack.

4. A machine of the class described comprising in combination, a bag magazine, means for'successively withdrawing bags from the bottom of the magazine, a receiving table or bed, forwarding rollers for receiving the withdrawn bags and charge end of the machine.

' A machine of the class described comprising continue the lateral movement of the bags toward the discharge end of the machine.

A machine of the 10: A machine of the class described comprising a pair of grippers for automatically withdrawing successively and lengthwise the lowermost bag from a bag stack, a pivot for the jaws of said grippers, a cam for pivoting each gripper jaw, a pivoted arm carrying said grippers, and a cam for bodily pivoting the grippers, whereby the grippers are caused to move into and out of operative position with respect to the bag stack.

11. A machine of the class described comprising in combination a bag magazine, means for successively withdrawing bags lengthwise from the bottom of the magazine, a receiving table or bed, forwarding rollers for receiving the withdrawn bags and depositing them upon said table or bed, a pusher for pushing the bags laterally from said table, cams controlling said grippers, driving mechanism for said cams, rollers and pusher, and means for adjusting said grippers, rollers, cams and driving mechanism relatively to the bag magazine to accommodate the machine to different length bags.

ADOLPH POTDEVIN

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