US2841935A

US2841935A - Bag-tying machine

Info

Publication number: US2841935A
Application number: US570738A
Authority: US
Inventors: Alfred P Krueger
Original assignee: DERBY SEALERS Inc
Current assignee: DERBY SEALERS Inc
Priority date: 1956-03-12
Filing date: 1956-03-12
Publication date: 1958-07-08
Anticipated expiration: 1975-07-08

Description

y 8, 1958 A. P. KRUEGER 2,841,935

BAG-TYING MACHINE Filed March 12, 1956 2 Sheets-Sheet 1 a 4| z o M 321 INVENTOR BYq Z V ATTORNEYS July 8, 1958 Q A. P. KRUEGER BAG-TYING MACHINE 2 Sheets-Sheet 2 Filed March 12, 1956 INVENTOR ATTORNEYS Unit States 228M335 Patented July 8, 1958 tice BAG-ruins Machine Alfred P. Krueger, Southbury, Conn, assignor to Derby Sealers, Incorporated, Ansonia, Corns, corporation of Connecticut Application March 12, 1956, Serial No. 576L733 12 fllaims. (Cl. 53--l35) by means of a short length of a pressure-sensitive adhesive tape. This tape may be wrapped around the neck of the bag, and the free ends of the tape brought together with their tacky surfaces in contact so that the length of tape will be fastened around the neck of the bag to seal the latter, the free ends of the tape projecting from the bag in the form of a flag.

In general, the device comprises aframe upon which is mounted a supply roll of'the tape to be used. A feed Wheel is provided upon the back or nontaclry side of the tape and adapted to liewith the free end of the tape spanning a notch in the wheel. The gathered end of the bag is then placed in this notch to be partly embraced by the tape, and the wheel is then rotated by moving the bag when 'the latter is in the notch in the wheel. A wiping roller is provided to engage the leading end of the tape, or that end on the forward side of the notch in the wheel, wrap it around the bag, and seal it against a similar length of tape on the opposite or trailing side of the notch. The tape is then severed and the bag withdrawn from the notch in a direction axially of the wheel to complete the operation.

One object of the present invention is to provide a bag tying machine adapted to seal the gathered end of a bag with a pressure-sensitive adhesive tape.

A still further object of the invention is to provide a bag-sealing machine of the character described which will be of simple construction, economic to manufacture, and, at the same time, efiicient and positive in operation.

Still another object of the invention is to provide a bag-sealing machine which, when operated, will serve to wrap a length of pressure-sensitive adhesive tape about the gathered neck of a bag, seal the tape, and sever the tape from a length thereof delivered by a supply roll upon movement of the bag through the machine.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed. i

In the accompanying drawings:

Fig. 1 is a side elevational view of the bag-tying machine embodying my invention;

Fig. 2 is a top plan view thereof;

'Fig. 3 is a partial side elevational view showing the side opposite that side shown in Fig. 1,;

Fig. 4 is a sectional view through the wiping roller on line 4-4 of Fig. 2; i

Fig. 5 is a sectional view on line 5--5 of Fig. 2 showingthe parts .in the position at :the time of the beginning of the sealing operation; and

Figs. 6, 7 and S are views similar to Fig. 5, some parts being broken away for the sake of clearness showing the position of the parts during various stages of the operation of the machine.

To illustrate one embodiment of the invention, there is shown in the drawings a bag-tying machine having a frame consisting of a base 10 and upstanding spaced plates it and l2. The plate 11 may be provided along its lower edge with a laterally extending plate 13 (Fig. 2), which may be secured to the base by screws or other fastening members 14. The cooperating plate .12 may be secured to the plate .11 by screws 15, which screws are embraced by spacing collars 116 to hold the two plates in spaced parallel relation.

it may be noted that the plate '11 is .of greater extent than the plate 12, and upon the former is rotatably mount-ed a reel 17 adapted to hold a supply roll of tape 13. In order to supply alen'gth of tape, shown at 19, to the tying mechanism to be hereinafter described, it will be understood that the tape 19 will be unreeled from the supply reel with its tacky side upwardly, as shown in the drawings.

Between the frame plates 1?. and i2 is rotatably mounted a feed wheel in on the axis 21. This wheel as shown is provided wth side flanges 22 about its periphery so as to provide between the flanges an annular groove or recess .23 within which the tape is adapted to lie with its nontacky side abutting the peripheral surface of the wheel between the flanges.

The wheel is provided with spaced notches 24 opening outwardly through the periphery of the wheel, the notches being formed in the flanges 22 as well as the body of the wheel itself. These notches will be spaced according to the length of tape that is desired to Wrap around the bag, and the number thereof will depend upon the periphery of the wheel, four of such notches being shown in the present instance. Rotatably mounted in slots 25 formed in the body of the wheel and extending through the outer periphery thereof are severing knives 26, there being one of these knives for each of the notches 24, and the knives being placed rearwardly of the respective notches in relation to the direction of rotation of the wheel. As shown, the plane of each knife is inclined with respect to the axis of the wheel so that the cutting edge 27 of each .knife, which projec from the periphery of the wheel between the flanges 22, is slightly on the bias with respect to the wheel.

Rotatably mounted between the frame plates 11 and i2 is a wiping and anvil roller designated generally by the numeral 3d. This roller, as shown in Fig. 4, is rotatably mounted on a pivot post Gil secured to the plate 11, and comprises a hub portion 32, a resilient body portion 33 which may be of rubber or similar material, and an outer metal rim 34. As will be explained hereinafter, this wheel has two functions, one of which is to engage the leading end of the tape forwardly of a notch 24, and wrap the tape about the neck of the bag. The other fear. tion is to cooperate with the biased cutting edge 27 of the severing members 26 to serve as an anvil to press the tape against the edge of the knife, and effect the severance of the tape from the following length .upon the wheel.

Each of the

frame plates

11 and 12 .is provided witha slot 35 of arcuate shape, this slot having the wheel axis as its center, and registering with the notches 24; that is, the radius of the slot is substantially the .same as the distance of the notches 24 from theaxis of thefeed wheel 20.

At the upper edge of the frame ,plates, the slot 35 communicates with .taperedslotted or mouth portions 37, so as to permit the entry of the gathered neck of .a bag through this month portion into one of the .notches 24. Adjacent their lower ends, the slots 35 are provided with a to the enlarged end portions 33, and then Withdrawn from the machine in a direction parallel to the axis 21 of the feed wheel.

A roller 40 is rotatably mounted upon the frame plate 11 (Fig. 1) between two pins 41, and the tacky side of the tape 19 is adapted to engage this roller in passing over these pins in order to place a certain amount of tension on the tape in order that it may be neatly wrapped about the neck of the bag. Also a knurled roller 4-3 is rotatably mounted upon the plate 11, this roller extending into the groove 23 of the feed wheel, although its periphery will be out of contact with the surface of the wheel to permit the passage thereunder of the cutting edges of the severing members 26. This roller will, however, maintain the tape within the groove in position to span one of the notches 24 in the wheel. V

The length of the arcuate portion of the slot 35 is substantially that between adjacent notches 24 so that when one of the notches registers with the mouth of the enlarged opening 38, the next succeeding notch will register with the slotted mouth portions 37. In order to releasably hold the feed wheel in this position so as to secure properindexing of the wheel in its operation, a ball detent 44 is mounted in an opening in the plate 11, the inner portion of the ball being received in one of the notches as shown for example in Figs. 2, 3 and 8. The ball may be held in place by means of a flat plate spring member 45 having an opening 46 in which the outer end of the ball is received, and the tension of this spring may be adjusted by means of an adjusting plate 47 adjustably secured to the frame member 11 by means of a slotted opening 43 through which is passed a screw or other fastening element 49. It will be seen that by loosening the screw 4-9, the member 48 may be moved toward the end of the spring plate 45 so as to adjust the tension thereof.

The operation of the device may now be described. When the device is in repose position, the length of tape 19 extending from the supply roll extends over the surface of the feed wheel within the groove 23, and spans the notch 24 which is in registration with the slotted mouth portion 37, as shown, for example, in Figs. 1 and 8. It will also be apparent that at this time the ball detent 44 registers with another of the notches 24, thus releasably holding the wheel in this position.

The gathered portion of the neck of a bag is then brought down through the slot 37 into one of the notches 24. This serves to press the tape down into the notch 24, and cause the leading end thereof to project upwardly, as shown at Sit in Fig. 5. The bag is then moved in a gen erally downward direction through the slots 35 of the

plates

11 and 12. This moves the end 50 of the tape past the wiping and anvil roller 30 so that the latter contacts the back or nontacky side of the tape, and causes it to be wrapped neatly about the neck of the bag, the free end of the tape assuming the position shown at 51 in Fig. 6.

Upon a continuation of movement of the bag, and, of course, the feed wheel 20, the parts reach the position shown in Fig. 7, wherein the free end of the tape which lay upon the forward side of the notch 24 has been pressed flatly against that portion of the tape on the rear side of the notch so as to seal the two plies together about the neck of the bag. At this time, the cutting edge 27 of the severing member 26 engages the rim 34 of the roller 30, and effects the severance of the tape just rearwardly of the free end thereof.

Upon a continued movement of the bag and feed wheel, the parts reach the position shown in Fig. 8, wherein the notch 24 registers with the mouth of the opening 38 so as to permit the neck of the bag to be drawn into this enlarged opening, and withdrawn from the machine substantially parallel to the axis of the feed wheel. At this time, it will be noted that the ball detent 44 registers with one of the notches 24 so as to hold the feed wheel releasably in this position and prevent overrunning thereof, in order that the next succeeding notch 24 will register with the slotted mouth 37. It may also be noted that, in this position, the leading edge of the portion of the remaining tape connected to the supply roll will, as shown at 52, lie upon the surface of the wheel spanning the next succeeding notch 24. The extreme end of the tape will be adja -nt the wiping and anvil wheel 30, but will adhere only lightly, if at all, to this wheel so that upon the introduction of another bag into the succeeding notch 24, the leading end of the tape will be free to swing upwardly and as the position shown in Fig. 5.

it will be noted that, rearwardly of each severing member, the feed wheel is provided with a relieved or cut-away portion providing a fiat surface 54 spaced slightly from the roller 30 so that, after the severing operation, the free end of the tape will not be held between the roller 30 and the feed roller, thus permitting the latter to move forward, independently of the tape, from the position shown in Fig. 7 to that shown in Fig. 8, permitting the free end of the tape to swing upwardly when the next operation is be 11.

gv hile I have shown and described one embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the claims.

What I claim is:

l. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressure-sensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and registering with said notch whereby the wheel maybe turned by movement of the bag, said slot opening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted on the frame with its periphery adjacent the periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, and a severing member mounted on the wheel to sever the tape at a point rearwardly of the notch.

2. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and regis tering with said notch whereby the wheel may be turned by movement of the bag, said slot opening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted on the frame with its periphery adjacent the periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, and a severing member carried by the wheel and projecting from the surface thereof to engage the tape and cut it against said roll member.

3. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the Wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and regis tering with said notch, said slot opening through an edge of the frame to permit the gathered neck of the bag to arran es be inserted in said notch, a roller member .rotatably mounted on the frame with its periphery adjacent the.

periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, a severing member carried by the wheel, rearwardly of the notch therein with respect to the direction of travel .of the wheel, and projecting from the surface thereof to engage the tape and cut it against said roll member, and said roller tmember cooperating with said severing member .to press the tape thereagainst as the severing member is carried past the roller member by rotationof the feed wheel.

4. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted on the frame with its periphery adjacent the periphery of the feed Wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, 21 severing member carried by the,

wheel, rearwardly of the notch therein with respect to the direction of travel of the wheel, and projecting from the surface thereof to engage the tape and cut it against said roll member, and said roller member being yieldable in a direction away from the feed wheel.

5. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted on the frame with its periphery adjacent the periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, a severing member carried by the wheel, rearwardly of the notch therein'with respect to the direction of travel of the wheel, and projecting from the surface thereof to engage the tape and cut it against said roll member, and the cutting edge of the severing member being disposed on the bias with respect to the axis of the wheel.

6. A bag-tying machine comprising a frame, a feed Wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot therein described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted on the frame with its periphery adjacent the periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, a severing member carried by the wheel, rearwardly of the notch therein with respect to the direction of travel of the wheel, and projecting from the surface thereof to engage the tape and cut it against said roll member, and one of said members being yieldable relatively to the other to permit the severing membet to pass the roller member upon rotation of the wheel.

7. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a *eripheral notch, means for supporting a roll of pressuresensitive tape in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having-an arcuate slot therein described about the axis of said wheel and registering with said notch, said slotopening through an edge of the frame to permit the gathered neck of the bag to be inserted in said notch, a roller member rotatably mounted .on the frame with its periphery adjacent the periphery of the feed wheel to engage the back of the leading end of the tape and fold it around the neck of the bag in said notch, a severing member carried by the wheel, rearwardly of the notch therein with respect to the direction of travel of the wheel, and projecting from the surface thereof to engage the tape and out it against said roll member, and the peripheral surface of the feed wheel being relieved rearwardly of the severing member to permit the end of the tape to lie freely between the roll member and the periphery of the feed wheel.

8. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape, tacky on one side only, in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of a bag to be inserted in said notch whereby the wheel may be turned by movement of the bag, a severing member carried by the wheel rearwardly of the notch therein, with respect to the direction of rotation of the wheel, and a combined wiping and anvil roll. member rotatably mounted on the frame to engage the nontacky side of the tape when the wheel is rotated and fold the free end thereof around the bag and serve as an anvil against which the severing member severs the tape.

9. A bag-tying machine comprising a frame, a feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of pressuresensitive tape, tacky on one side only, in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of a bag to be inserted in said notch whereby the wheel may be turned by movement of the bag, a severing member carried by the wheel rearwardly of the notch therein, with respect to the direction of rotation of the wheel, a combined wiping and anvil roll member ro tatably mounted on the frame to engage the nontacky side of the tape when the wheel is rotated and fold the free end thereof around the bag and serve as an anvil against which the severing member severs the tape, said roll member being mounted on a fixed axis, and one of said roll and severing members being yieldable relatively to the other.

10. A bag-tying machine comprising a frame, feed wheel rotatably mounted on the frame provided with a peripheral notch, means for supporting a roll of prossure-sensitive tape, tacky on one side only, in position for a length thereof to lie on the periphery of the wheel spanning said notch with its tacky side outwardly, said frame having an arcuate slot described about the axis of said wheel and registering with said notch, said slot opening through an edge of the frame to permit the gathered neck of a bag to be inserted in said notch whereby the wheel may be turned by movement of the bag, a severing member carried by the wheel rearwardly of the notch therein, with respect to the direction of rotation of the wheel, a combined wiping and anvil roll member rotatably mounted on the frame to engage the nontacky side of the tape when the wheel is rotated and fold the free end thereof around the bag and serve as an anvil against which the severing member severs the tape, and

notches, and a severing member is disposed rearWardly of each notch and wherein means are provided to index said Wheel with one of said notches registering with the opening of said slot through the edge of the frame.

12. A bag-tying machine as in claim 1 wherein the feed wheel is provided with a plurality of peripheral notches, a severing member is disposed rearwardly of each notch and wherein means are provided to index said wheel with one of said notches registering with the opening of said slot through the edge of the frame, and

said indexing means comprises a spring-pressed detent 15 mounted on the frame to engage one of said notches in the wheel.

References Cited in the file of this. patent UNITED STATES PATENTS Buhse Nov. 10, 1914 1,193,506 Brown Aug. 8, 1916 1,823,597 Foulder Sept. 15, 1931 2,223,017 Abrams Nov. 26, 1940 2,514,453 Miller July 11, 1950 2,536,455 Miller Jan. 2, 1951 2,543,323 Marsh Feb. 27, 1951 2,651,900 Heilman Sept. 15, 1953 2,762,179 Young Sept. 11, 1956