US1463870A - Strap-tightener tool - Google Patents

Description

Aug. 7, 1923. 1,463,870

L. CAMPBELL STRAP TIGHTENER TOOL Filed June 27. 1921 Patented Aug, 7, llQZEK r eh,

LAYABJD CAMPBELL, OF HEX/V YORK, N. Y,, .ASSIGNOR, BY MESNE ASSIGITIWENTS, TO TWIST SEAL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

STRAP-TIGI-ITE1JEEE TOOL.

Application filed June 27,

To all to 710m it may concern Be it known that I, LAYARD CAMPBELL, a citizen of the United States, and a resident of the city of New York, borough of Mana hattan, county and State of New York, have invented certain new and useful, Improvements in Strap-Uiightener Tools, of which the following is a full, clear, and exact dey scription.

Among the principal objects which the present invention has in view are: To take up the slack in wire straps fastened on cases or cartons for transportation, which slack results in part from the operation of the tools for fastening the straps; to simplify the method of performing the operation;

and to reduce the labor factor thereof.

Drawings.

Figure 1 is a plan view showing a package reinforced by a wire strap and a tightening loop formed thereon by the tool the subject of the present invention;

Figure 2 is a bottom end view of a tool 2% constructed and arranged in accordance with the present invention, showing in conjunction therewith a fragment of a wire strap disposed as in the initial position as sumed when forming a tightening loop;

Figure 3 is a similar view showing the tool in the position assumed. thereby at the beginning of the operation of forming the loop; t

Figure 4c is a similar view showing the tool as in position for further advance in the operation of forming the loop, the riding cams having depressed and passed over the body of the wire to lift the loops thereabove;

Fig. 5 is a similar view showing the tool in the position at the completion of the tightening loop;

Figure 6 is a detail view on enlarged scale showing a side view of the operating end of the tool;

Figure 7 is a detail view in perspective and on enlarged scale, showing the tightening loop formed by the said tool;

Figure 8 is a side elevation of the tool constructed and arranged in accordance 1991. Serial No. 480,505.

with the present invention in operating poi Description.

When forming the sealing tie such as indicated by the numeral 15, the wire strap l6 is usually taken up so that when the tie s completed a certain amount of slack exists in the strap. This has been found disadvantageous, in that it permits the Wire to be used as a means for lifting the package, thereby further stretching the wire and increasing the slack therein, and the same is apt to loosen enough to permit it to be shifted on the package. Some packages, such as packages of shingles, require closer binding-one without any play in the strap, When it becomes necessary to tighten the strap the tool shown in the drawings, having a head 17 which is provided with two pins 18 set out from the surface, is adjusted on the strap 16, so that the same passes between the said pins in the manner shown in Figure 2 of the drawings. The head 17 is preferably provided with a turning handle 19. This may, however, be dispensed with, and pliers r other forms of the usual workmans kit may be employed for grasping and turning the head 1'7. The heads 17 are usually provided with lugs 20, the under surface of which is inclined or cam shaped, the purpose being to over-ride the strap 16 when the tool is moved from the position shown in Figure 3 to the position shown in Figure -l. By so over-riding the wire beyond the loops 21 formed by the wire wrapped on the pins 18, each of the said loops is permitted to pass above the wire, and over the same, until each of the loops wrapped about the throat of the adjacent loop, so that the wire composing the strap 16 is twisted upon itself in a manner shown in Figure 7 of the drawings. It will be understood that the loops 21 are twisted to the position shown in the drawings by less than a complete revolution of the head 17. Therefore, the operation of the tool is very rapid.

If one set of the loops 21 does not prove Claims.

1. A tool as characterized comprising a plurality of devices for engaging wire at opposite sides thereof; means for gyrating said devices about a common center to form oppositely extended loops in said wire, and a projection having an inclined surface associated with each of said devices, and arranged to remove the body portion of the Wire from the path of said devices to permit the loops formed thereby to pass over the body portions of the wire.

2. A tool as characterized comprising a plurality of devices for engaging wire at opposite sides thereof; means for gyrating said devices about a common center to form oppositely extended loops in said wire; and means for engaging said wire adjacent said devices for removing the engaged portion of said wire from the path of said devices to permit the loops formed thereby to pass over the body of said wire.

3. A tool as characterized comprising a plurality of devices for engaging wire'at opposite sides thereof; means for gyrating said devices about a common center to form oppositely extended loops in said wire; and means for engaging said wire adjacent said devices for removing the engaged portion of said wire from the path of said devices to permit the loops formed thereby to pass over the body of said Wire, said means embodying a plurality of cams, each cam being spaced apart from said devices and shaped to depress the body of said wire from the normal level thereof.

4. A tool as characterized comprising a head; a plurality of pins mounted thereon in spaced relation to the center thereof; a plurality of cam shaped lugs mounted on said head in spaced relation to said pins, the advancing surface of said lugs being inclined backward; and means for rotating said head.

5. A tool as characterized comprising a head; a plurality of pins mounted thereon in spaced relation to the center thereof; a plurality of cam shaped lugs mounted on said head in spaced relation to said pins, the advancing surface of said lugs being in clined backward; and means for rotating LAYARD CAMPBELL

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