US1502029A - Twisted knot for securing shipping packages - Google Patents

Description

med March 29, 119223 Imm/bow Ala J Gerrard Palrin Wjh Patented July 22, 1924.

UNITED STATESl ALEC J'. GERRARD AND PARWN WRIGHT, OF CHIC-AGO, ILLINOIS..

rwrs'rEn xNoT ron sEcuRING sHIPPmG PAcxaGEs.

Application filed March 29, 19.23. Serial No. 628,592.

To all whom z'zf may concern.'

Be it known that we, ALEC fJ. GERRARD and PARVIN WRIGHT, respectively a 'subject of the King of Great Britain anda citizen'of 'the United States, both residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Imrovements in Twisted AKnots for Securing hipping Packages; and we dol hereby declare the following to be a full, clear, and exact description of the,invention, such as will enable others skilled in the art to which it appertains to make and use the same.

' This invention relates to twisted4 knots formed by wire tying machines in the act of banding ackages, while the wire is under tension, and) has'for its object to provide a knot in which the twisted ends are not only cut off short at each extremity of the knot, but are also tucked down alongside the adjacent wire bights and below the top surfaces of the same.

With these and other objects in view, the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specication, in which like numerals designate like parts in allthe views:

Figure 1 is a plan view of a twistedknot made in accordance with this invention;

Figure 2 isa diagrammatic partially sectional view illustrating the construction of one extremity of the twisted portion of the knot shown in Figure 1;

Figure 3 is a sectional view taken on the line 3 3 of Figure 2, lookingin the direc; tion of the arrows;

Fi e 4 is a view similar to Figure 2, llilowing the other'extremity of the twisted Ot. v

Figure 5 is a sectional view taken on the line 5-5 of Figure 4, looking in the direction of the arrows;

Figure 6 is a diagrammatic perspective View; of a portion of the machine adapted Ato make the knot shown in Figure 1, and eX- plaining the construction of said knot; and

Figure 7 is a sectional View of a portion of the machine adapted toinake the knot of Figure 1, and serving to still further explain the differences between this knot and those which have preceded the same.

In order that the precise invention may be the more clearly understood, it is said: As is well known knots of the character herein disclosed are made of steel wire, and if the extreme ends of the severed wire are allowed to project up beyond the top surfaces of their adjacent bights of the wire, they form veritable chisel points whichwillnot only tearthe hands and clothin .of the stevedores and other freight han lers, but will also rip open other packages that may be slid over saidpoints during shipment. It is also well known that inventors have for years striven to avoid these objections by various devices 'which have greatly improved the situatiombut never prior to this invention, in' so far as we are aware, has

anyone succeeded in making. a knot that has the advantages and safety features of the one about to be disclosed.

In order that the diii'erencesbetween this knot and thel rior knots may be rendered more clear, re erence is first had to Figures 6 and 7, in which 1 'represents the frame of a machine made the subject of our cepending application Serial No.v 628,591 filed March 29, 1923, .and entitled Wire-tying machine. 2 represents a-wire holding ost having a slot 3 adapted to receive paral el bights 4 and -5 of the wire, but not large enough to permitsaid bights to 'be twisted' therein. 6 and 7 represent slots suiiiciently large to permit said bights to be twisted together,

while 8 and9 represent slots too small to permit said twisting action. In practice the end of bight 5 is suitably secured in slot 3,

and said bight 5 is then disposed successively in slots 6, 8, 7 and 9, whence it passes around the package not shown, and is brought back as bight 4 to slot 3 and disposed as bight 4 successively in said yslots 6, 8, 7 and 9, whence it is carried to a tensioning meansv and the twoparallel. bights 4 and 5 placed under a .considerable strain. After the desired tension has been placed on the bights 4 and 5 the twisting element 31 provided with the slot'8 is rotated a predetermined number of times which has lthe effect of twisting together those portions'of' the parallel disposed bights which occupy the slots 6 and 7 all as is disclosed in our said copending application above mentioned.

But as intimated above,.if the ends of the twisted knot are permitted to stick up above the surfaces of the untwisted portions 4 and of the twisted knot, the above machine is .provided with cutters 10 and 11, inclined to the vertical as shown in Figure 6, which are provided with cutting edges 12 and 13 respectively, and each cutting edge is associated with a beveled friction surface such as 14 and l5.'

By referring to Figure 2, it will be observed that the bight 4 is positioned in the slot 3 and that the lower edge 16 of said slot constitutes an anvil or cutter for the bight 5 which before the cutting action occupies the dotted line position shown. It will be further observed` that the cutting edge 12 of the cutter 10 descends upon the bight 5 and coacting with the anvil edge 16 severs said bight 5 when said .edge 12 reaches a plane such as 17 located above said edge 16. That is, the edge 16 cutsa portion of the bight 5 and the edge 12 cuts another portion, so if the cutter 10 were withdrawn immediately upon the completion of this severing action, the severed end 2O of the wire instead of occupying its full line position shown in Figures 2 and-3 would occupy the dotted line position of bight 5 indicated in said figures.

That is to say, the said severed end 20 would not b'e tucked down below the top surface of the bight 4 as it' is in practice, and` consequently it would be liable to spring up above the surface of the bight 4 and thus tear the hands of the operators and to rip open other packages in the manner above disclosed.

rllhis invention, however, as above stated, has the cutter 10, which in addition to the cutting edge 12 is provided with an extended frictional beveledportion 14, and the cam 21 operating said cutter has a sufficient throw to cause said cutting edge 12 as indicated in Figures 2 and 3 to descend well down beyond the plane 17 in which the wire is completely severed and to thus cause its fric tional surface 14 to bear heavily upon the extreme end 2O of thev severed wire and to thus bend it down and, permanently set it into the position shown in Figure 2, which is well below the top surface of the bight 4.

4In fact, the downward movement of the cutter 10 is suiicient for the surface 14 to' rub off or to pinch off a noticeable portion of themetal and thus to form the flat surface such-as 23in the extreme end 20 of `the severed wire as illustrated. So great twist so that the pitch of the twist at this particular extremity of the twisted knot is greatly increased as indicated, and therefore there is no danger of this said end 20 being bent back in such a position that it could stick up to tear the hands of the freight handlers or to injure other boxes 'that may be slid thereover.

Coming to the' other extremity of the twisted knot illustrated in Figures 4 and 5, the cutter 12 coacting withthe cutting anvil edge 25 formed by the lower portion of the fslot 9 effects the severings of the bight 4,

in a plane which may be indicated by the dotted line 26, and the cutting edge 13 of said cutterll is caused by the cam 27 to descend well below 'said' plane 26 and thus is the extended-beveled surface 15 of the I cutter 17 caused to rub against the severed end 28 of the twisted strand of the knot, and to bend the same down against the twist of the knot from the dotted line position` shown in Figures 4 and 5, vto the full line position shown in said figures. rlhat is to say, the said frictional beveled face 15 ofthe cutter 11 contacts with the point 30 of the extreme end 28 and rubs olf or pinches ofi' a portion of the metal as indicated, with such a force that the extreme end 28 is visibly untwisted to a degree sufficient to permanently set said extreme end 28 well down below the top surface of the companion the finished knots well below the horizontal.

diameters of their companion bights 4 and 5 when the knot is in place on shipping packages. often so pronounced that said end actually -lies substantially underneath the bight 5 instead of well below its horizontal diameter as indicated in Figure 5. Since the inner ends of the slots 3 and 9 mark sharply the extremities of the twisted knot, and since the cutters 10 and 11 sever in the vertical planes marking these extremities, it is evident that no extra lengths of wire are left at the ends of the twisted knot at all which can be through accident or design turned up to injure the operators or other packages in the manner above disclosed. Therefore, this knot unquestionably marks a distinct advance over all prior knots of like nature. Further, it is found that wire of unusually large size can be employed in making this knot, so that very heavy packages weighing The action as regards the end 28 is rsoaoaa one or Amore tons can be banded with these knots without in the least endangering the operatives or other packages which may be slid thereover.'

What we claim is:

l. A knot adapted to be formed by a Wire tying machine composed of a pair of bights of a wire twisted together and when Ain position on a package having the eXtreme ends of the twisted strands severed 'at the extremities of the twisted knot and said severed ends bent down and'permanently set below the top surfaces of the untwist'ed strands.

2. A knot for banding shipping containers consisting of a pair of bight-s of a wire twisted together with the extreme ends of the twisted strands cut off close to the twisted extremities of the-finished knot and bent down with a permanent set below the top surfaces of their adjacent bights when in creasing the saineD 3. A knot for banding shipping containers, consisting of a pair of bights of a wire twisted together with the extreme ends of' 'the twisted strands cut oit vclose to the twisted extremities of the finished knot and bent down with a permanent set below the horizontal diameters of their adj aeent bights when in operative positions on said' containers, the set of one of said ends increasing the twist and the set of the other of said ends decreasin the same.

In testimony whereof We aix our signatures.

ALE@ J. GERRARD. PARVIN WRlGHT.

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