US2614523A

US2614523A - Gummed tape serving and moistening mechanism

Info

Publication number: US2614523A
Authority: US
Inventors: Robert A Havemann; Donald S Bruce; Charles B Macrae
Original assignee: Gummed Products Co
Current assignee: Gummed Products Co
Priority date: 1949-12-22
Filing date: 1949-12-22
Publication date: 1952-10-21
Anticipated expiration: 1969-10-21

Description

Oct. 21, 1952 R. A. HAVEMANN ETAL 2,614,523

GUMMED TAPE SERVING AND MOISTENING MECHANISM Filed Dec. 22, 1949 1N VEN TORS Reamer l. HAVEMANN 4 .Do/wua 52 BRUCE BY C'unm. Es .3. Mvc IP45 ATTORN EYS.

Patented Oct. 21, 1952 GUMMED TAPE SERVING AND MOIS' IENING v MECHANISM Robert A. Havemann and Donald S. Bruce, Troy, Ohio, and Charles B. MacRae, New York, N. Y., assignors to The Gummed Products Company, Troy, Ohio, a corporation of Ohio Application December 22, 1949, Serial No. 134,454

8 Claims. (01. 118-39) 1 Our invention relates to tape serving and moistening mechanism adapted to feed .a predetermined supply of tape-which has a tear string extending medially lengthwise of the tape, to

cut off the tape, and to moisten the tape to prepare it for application in container sealing.

In such mechanism it is the object of our invention to provide improvements wherein, after a predetermined supply is fed forwardly, means are providedv to function in conjunction with the mechanism which cuts off the tape from the supply whereby a slit is cut in the cut edge or edges of the supply, which when the tape is fed forwardly and cut oil, will provide a tear string'tab ortabs which will facilitate tearing out the string to release the seal of the tape from the container.

Another object is to provide -a guard. which inhibits moistening by the tape moistening brush along a band of the tape through the center of which the tear string extends. The purpose of this improvement is to prevent sealing that part of the tape, through which the tear string extends, to the container which would make release of the tear string and its bisecting of the tape a difiicult operation.

The above objects and other objects to which reference will be made in the ensuing description, we accomplish by that certain combination and arrangement of parts which we have illustrated in combination with the gummed tape serving machineas substantially shown and described in the United States Patent No. 1,742,603 of Theodore H. Krueger dated January 7, 1930 on Tape- Serving Machine.

It should be understood that the addition of the working parts to such a machine as that to which reference has been made may also be added to other types of gummed. tape serving machines having a cut oil knife and moistening brush. In the drawings: Y

Figure lis a side elevation with the internal operating parts indicated in dotted lines, the

machine being in normal inoperative position.

Figure 2 is atop plan view of the machine parts being broken. away to reveal the mechanism Eigure.-.5.isa perspective view of the. simplest I form; tab slitting device.

Figured is a perspective view of the central band moistening inhibiting device.

Figure 7 is a plan view of a piece of gummed tape having a .tear string extending medially lengthwise of the tape showing one type of tear string pull tab.

Figure 8 is a diagrammatic sectional .view showing a modified type of tape slitter which slits both the lead edge of tape to be advanced but also the rear edge of a piece of tape as a predetermined length is cut olf.

Mounted upon suitable legs l we have shown the upright rigid side panels 2 between which the various rollers and rods forming part of the tape dispensing mechanism are journaled or supported.

The supply roll 3 of tape having a. tear string 4 extending medially of the tape is mounted on the rollers 5 and 6. v Other mechanical equivalents may be provided to support the roll or supply of tape. The tape is fed forwardly by frictional contact with a lower feed roll 7 and upper feed roll 8.

The feed roll actuating lever 9 is journaled as indicated at 10 on a shaft rotatively mounted between the side panels 2. The lever has a round hole II on its short arm which engages a pin 12 onthe ratchet Wheel 13. An elongated arm 28a is fixed to the ratchet wheel l3 and positionedso that its flanged end 28a will be contacted by'the actuating lever 9- and moved therewith. The

ratchet wheel I3 is thus driven in a clockwise direction by the actuating lever 9 which contacts The upper feed roll 8 is mounted in slots-2i) which permit the feed roll 8 to rotate by fric tional contact with the lower feed roller 1 either with tape between the rollers or with the feed rollers merely engaging frictionally. The throw of the lever. 9 is controlled by an adjustable stop mechanism generally indicatedat 2.

The lever 9 has an actuating handle 2| which the operator-0f the machine uses to advance a predetermined length of tape to the. brush moistening mechanism. Adjusting the mechanism 22 induces a greater or lesser throw of the feed roller 1.

A spring 24 urges the lever 9 in a counterclockwise direction. As the tape is fed forwardly from between the upper and lower feed rollers it passes between upper and

lower guide plates

25, 26. The upper guide plate 25 has a cutting edge 21 which, as will be described, functions with the cut off knife to shear off the tape crosswise of its length after a predetermined length of the tape has been fed forwardly.

The mechanism for cutting off a predetermined length of tape and with which one of the important elements of our combination functions comprises a dog 29 pivoted to the crank arm. 30 which in turn is fixed to the long crank arm 32 pivoted on journal 33. At the other end of the crank arm 32 the link 34 connects the crank arm 32 to the cut-off knife 33 pivoted at 31 (Figure 3). A spring 35 normally biases the lever arm 32 to the position illustrated in Figure l. A roller 3| is mounted on the actuating lever 9 and with each clockwise movement of the lever 9, the roller 3| moves from its position beneath the dog 2 9, the

dog 29 being pushed upwardly to permit passage of the roller. When the actuating lever 9 reaches the endof its clockwise movement it is released, whereupon it returns to its starting position under the influence of the spring 24. This .movement causes the roller 3! to strike the dog 29 thereby causing a counter-clockwise movement of the long lever arm 32 through the intermediary of the lever arm 30 and against tension of the spring 35f When the crank arm 32 is rocked in this manner, the end of the cut-off knife is elevated with a quick shearing stroke which severs'the tape.

The parts and their operating movements thus far described form no part of our invention.

However, it is to the shearing knife 36 that wehave added the parts which make snipping a tear string pull tab on the leading end of the uncut tape supply possible. A cutting die, as shown in Figure and consisting of the knife edged portions 38 is mounted on a base 39 which is secured with screws 40 to the knife 36 (as illustrated in Figures 3 and 4) The upper guide plate 25 has a pair of slotsAI, as shown in Figure 2, which permit the portions 38 to pass through the tape making lengthwise slits 42 in the leading edge of the tape supply on both sides of the line where the tear string 43 is secured to the adhesive surface of the tape.

The slits 42 may be parallel with the length of the tape or they may be rounded to provide a. larger tab.

It will be observed that the moistening brushes 44, as shownin Figure 6, have a guard 45 which covers over the bristles so that no moisture will be applied to a band of the tape extending on both sides of the tear string. This is to prevent the tear string and the tear tab being adhesively secured to the container.

One particular utility of the tape with the tear string extending down the middle of the tape is that the tape as withdrawn from the gummed tape serving machine may be secured across the lateral joint between closing flaps on the upper sideof a container. To open the container all that is necessary is to pull'upon the tear string and the bisected tape will permit the container flaps to be opened.

..: Our invention is described in terms. of its simplest form. It may be utilized with any type,

of-tape dispenser-which has a cut off-knife; All

that is required for such a machine is a new knife with the slitting knives 38 formed as a die secured to the knife in the appropriate position. Then slits must be provided in the upper tape guide plate and a guard in alignment with the center of the moistening brush' to inhibit moistening of the tape adjacent its median line.

From its process aspects our invention contemplates any tape dispensing apparatus in which as a strip of tape is advanced, a tear tab is snipped in the leading edge of the supply to be next served or dispensed.

As is diagrammatically shown in Figure 8,

instead of slitting only the lead edge of a strip of tape about to be advanced, it is within the scope of our invention to provide two cutting dies attached to the cut-off knife to slit the rear or trailing edge of a strip coincident with its being cut off. Thus in Figure 8 the knife is indicated at 36 having the slitting die 38, but another slitting die 3811 is mounted on the front face of the cut-off knife. In this case the plate 25 extends at theside edges around the knife providing an extension 2511 in front. This extension is provided with slits 41a to cooperate with the slitting die 38a. The mounting of the die 38a is such that the slit is formed in the rear or trailing edge of the strip of tape which is to be cut off before the cutting off stroke of the cut-off knife is completed. This prevents the slitting tending to tear the edges of the rear end of a dispensed piece of tape. The function of the guard for the brush will be the same with both types of slitting. As indicated in Figure 7 in. dotted lines at 42a with the double slitting operation, both ends of the tape will have tear string withdrawal tabs.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In combination in a gummed tape serving machine provided with a tape feeding device for tape which has a tear string extending medially and lengthwise of the tape, 'a supply device for such tape, means for feeding forwardly a limited supply of such tape, in a step-by-step operation, a retaining plate under which said tape is fed having a severing edge extending crosswise of the direction of feed of the tape, a cut-ofi knife pro vided with means, synchronized with the tape feeding device, for actuating said knife and adapted to move into such relationship with the severing edge of the retaining plate as to sever the tape crosswise of its length at the end of each feeding operation and cooperating means on said knife and severing edge for slitting an edge of the tape at the end of a step-by-step feeding operation to form a tear string pull tab.

2. In combination in a gummed tape serving machine provided with a tape feeding device for tape which has a tear string extending medially and lengthwise of the tape, a supply device for such tape, means for feeding forwardly a limited supply of such tape, in a step-by-step operation, a retaining plate under which said tape is fed having 'a severing edge extending crosswise of the direction of feed of the tape, a cut-off knife provided with means, synchronized with the tape feeding device, for actuating said knife and adapted to move into "such relationship with the severing edge of the retainin -plate as to sever the tape crosswise of its length atthe end of each feeding operation, a pair of spaced apart slitting knives secured to said cut-off knife in angular relation thereto for slitting the leading edge of the unsevered supply of. such tape at the end" of a step-by-step feeding operation to form a tear string pull tab, said retaining plate having spaced apart slits therein for the passage of said last mentioned pair of knives.

3. In combination in a gummed tape serving machine provided with a tape feeding device for tape which has a tear string extending medially and lengthwise of the tape, a supply device for such tape, means for feeding forwardly a limited supply of such tape, in astep-by-step operation, aretaining plate under which said tape is fed having a severing edge extending crosswise of the direction of feed of the tape, a cut-off knife provided with means, synchronized with the tape therein, said retaining plate having spaced pairs of slits therein for the passage of said spaced pairs of slitting knives.

4. In combination in a gummed tape serving machine provided with a tape feeding device for tape which has a tear string extending .medially and lengthwise of the tape, a supply of such tape, means for feeding forwarding a limited supply of such tape, in a step-by-step operation, a retaining plate under which said tape is fed having a severing edge extending crosswise of the direction Of feed of the tape, a cut-off knife provided with means, synchronized with the tape feeding device, for actuating said knife and adapted to move into such relationship with the severing which the tear string extends.

5. The structure claimed in claim 4 wherein said means for inhibiting moistening of the tape along a band through which th tear stringextends comprises a guard extending transversely across said brush and serving to maintain the bristles of the brush lying beneath said guard out of contact with the tape.

6. In combination'with the cut-off knife in a gummed tape serving machine, a'clltting die secured to said cut-01f knife for snipping a pair of slits in the leading edge of a strip of tape to b subsequently served, said cutting die comprising a pair of spaced apart cutting edges angularly related to the cutting edge of said cut-01f knife.

7. In combination with the cut-01f knife in a gummed' tape serving machine, a cutting die secured to said cut-off knife forsnipping a pair of slits in the trailing edge of a strip of tapeas it is served, said cutting die comprising a pair of spaced apart cutting edges angularly related to the cutting edge of said cut-off knife, said die being so positioned that said spaced apart cutting edges will slit the strip of tape prior to the time the tape is severed by said cut-off knife.

8. In combination with the cut-off knife in a gummed tape serving machine, a cutting die associated with said cut-off knife for cutting slits lengthwise of the tape coincident with a crosswise cutting operation of the cut-oil knife, said cuttin die comprising a spaced pair of cutting knives secured to one side of said cut-off knife for joint movement therewith.

ROBERT A. I-IAVEMANN. DONALD S. BRUCE. CHARLES B. MAoRAE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,894,317 Link Jan. 17, 1933 1,932,875 Addison et al Oct. 31, 1933 1,967,579 Krueger July- 24, 1934 2,006,417 Topping July.2, 1935 2,053,786 Straubel Sept. 8, 1936 2,079,328 McBean May 4, 1937 2,152,012 Albion Mar. 28, 1939 2,285,507 Gilliam June 9, 1942 2,340,127 Karlson Jan. 25, 1944 2,360,845 Bronander Oct. 24, 1944 2,365,477 Krueger Dec. 19, 1944 2,370,079 Schmidt Feb. 20, 1945 2,379,033 Olsson June 26, 1945 2,408,363 Beckman Oct. 1, 1946 FOREIGN PATENTS Number Country .Date

Great Britain Sept. 21, 1937