US2915104A

US2915104A - Machine for making barbed metal band

Info

Publication number: US2915104A
Application number: US551674A
Authority: US
Inventors: George E Rasmussen
Original assignee: Acme Steel Co
Current assignee: Acme Steel Co
Priority date: 1955-12-07
Filing date: 1955-12-07
Publication date: 1959-12-01
Anticipated expiration: 1976-12-01

Description

Dec. 1, 1959 s. E. RASMUSSEN 2,915,104

MACHINE FOR MAKING BARBED METAL BAND Filed Dec. 7, 1955 5 Sheets-Sheet 1 INVENTOR.

N TR

Dec. 1, 1959 G. E. RASMUS'SEN MACHINE FOR MAKING BARBED METAL BAND Filed Dec. 7. 1955 s Sheets-Sheet. 2

MN H :1 N

m AN IN V EN TOR. Geofgelifiasmssen MN N 1---- uqw/ @zcm Dec. 1, 1959 Filed Dec. '7. 1955 G- E. RASMUSSEN MACHINE FOR MAKING BARBED METAL BAND 3 Sheets-Sheet I5 INVENTOR.

Georggflfiwsmssem.

proved machine by .yvhich :shown.-in Figs. land 2 when the the machineof the present invention; I

Fig; 4-..showsan enlarged'transverse. section through .a portion of the completed barbed metaltband shown-sin.

United States Patent O 12,915,104 'MACHINEFOR MAIQNG BARBEB METAL BAND George E. Rasmussen,.ParkForestylllt, assiguortq Acme Steel Company, Chicago,.Ill., .a corporation of Illinois Application December 7,"-195'5,= Seri'al N65551674 I 9. Claims. (Cl. .1ss-.-29

This..invention=. ;'relates to vimprovernents -i Il-=Ii1fiCh-iI1GS .for making barbed rrnetalrzbands-imwhich. adflat metal band is. provided along itssedges with two-.ser-ies of radiating barbs org-spikes. The present inventionisparvticularlyzadapted for nse in; forming a barbed: metal band .of the type which is described and claimed in the pend- ,ing application. for Letters Patent of the United States,

.Serial No. 551-;684, now .P atent"No.,2,854,088,-. filed 'by Chester .M. MacCheSney and Allen .B; Wilson on Decem- .ber 7,1955. 7 w

'. In thatapplication .there isdisclosed atbarbed metal band formed from a .flat strip byslittingqthe strippinwardly from its edgesrat acute angles :to.-its longitudinal. 1

I The principalzobject of thepresentinventionis.to. provide novel apparatus vfor operating upon ar-fiatimetal strip. to .bendedge portions thereof transversely. tQff ol'm radiating ,barbs. ,Another. object is to .provide :an importions of. a :metal strip, formed by slitting .theledgesthereof.atacute angles,..are .bent transversely to-theplane of .the metal 'band.to assume varying angles .to. said plane, thereby-providing- -.project from-the edgespf. the strip radiating barbs which on both sides .fof said .plane. Another objectis topro- .vide a machine comprisingtwo rotatingqrnembers each carrying a relatively .fix'ed..'die and. a .relatively..movable die adapted to operate .upon' opposite edge portions of, a metal strip tobend said portions. transve'rselyto the plane of thestrip. Still another object .Tofthe invention is-to provide a machine having two seriesof-dies adapted to be moved successively into positionswhere theyengage the opposite edge portions of amet'al strip and bend transversely portions "ofthe strip which have previously been formed by slitting the e ges of the strip; Other objects relate to various features of construction and arrangement which will appear more: fully hereinafter.

The nature of theinvention will be understoodlfrom the following specification taken with the accompanying "drawings in which" one embodiment isillustrated. In thedrziwings;

Figure 1 showsatop plan view of" a barbed metal Fig- 2 showsanend elevation of the :barbedmetal band illustratediiir Fig. l

Fig. 3' shows a top plan:view of a flat metal'strip which has been slitted along its edges .to form inclined pointed portions which are adaptedrtto be bent into theform strip is; passed through byt he use of the machine of slitted edge portions of the in Fig. 3.

- barbs alsoin'cludes two barbs 10c which I whereit is 2,915,104 i atented Dec. 1, 1959 .Fig'. 1', illustrating in elevation a portion of thebarb embodying the present invention and adapted to produce from the slitted band shown in Fig. 3the-barbed band shownin Figs. 1 and 2;

Fig'. 7 shows a-vertical section taken on the line 7--7 .Fig.f8 shows a perspective view of a portion of the forming apparatus of the 'presentinvention; illustrating theaoperation of the dies of this machine in bending the metal strip.

Acomplete barbed-metal band'of the form adapted to be produced by the present invention from a slitted blank for strip is shown in Figs. 1 and 2 of the accompanying drawings, and the slitted metalblankor strip is shown .This barbed metal band comprises a fiat metal :band 10 provided along itscenter with a series of spaced index holes 1011, which are adapted" to position the band in the machine ofthe present invention by which it may be formed, and having along its edges two seriesof'radiating spikes orbarbs 'which'are similarly constructed'and similarly located at each edge of the band: "These radiatingspikes or barbs ateach edge of the :band includebar bs 101) which are arranged at relatively small anglesrto the plane ofthe band and which diverge in opposite directions from that -"plane., Each series of diverge in oppositedirections-from the plane of the band 10 at sub- -stantially greater anglesyas shown in "Fig. 2. The barbs are spaced apart longitudinally of the'band and each pair of barbs 10b which' are directed in opposite directions fromrthe plane of theband are preferably located ad jacent ejach-=other and between two pairs of barbs which diverge from the plane of the band at greater angles. ,There is thus formed a flat metal band 10 having two series of divergent-spikes or barbs located along its opposite edges and-arranged in the same manner at each edge. Due to thedistribution of the barbs substantially around all parts of the band 10, this barbed metal band is well adapted for us'e'in military operations desiredto provide a barricade to prevent the passage of troops and this construction is also well suited for-the construction of fences and the like where it is desired to prevent the passage'of cattle or other animals with a minimum use of fencing material.

In Fig. 3 ofthe drawings there is illustrated the flat metal strip 10d from which the finished product shown in Fig. 1 is formed. This fiat metal strip is run endwise through a punch press or through suitable slitting rolls to form along the center of the strip a series of equally spaced index holes 16a and also toslit the strip along diagonal lines'at its opposite edges to form the cuts 10e and 10); which are located at acute angles with respect to theedges of the metal strip, thus forming along both edges ofthis strip a series 0 attached sharp portions 10g which are adapted to bebent from the plane of the strip .to produce the barbed band which is shown in Figs.

1 and 2, the sharp portions 10g becoming the

barbs

10b and 100 which have previously been described. The

, and it should be quite may be readily manipulated when it is put into use.

The barbed metal band described above is adapted to be produced from the slitted strip shown in Fig. '3 the present; invention which 3 is illustrated in Figs. 6 to 8, inclusive. The slitted band may be formed at any desired location and then transported to the field of use where this may be used to form the barbed band. This band forming machine comprises a base 12 on which are mounted two upstanding parallel frame members 13 in which are journalled two shafts 14 and 15. These shafts are journalled in bushings 16 mounted in the frame members and they extend parallel to each other in horizontal planes. The shafts have projecting

portions

14a and 15a extending beyond one of the frame members 13 and having secured thereon two gears 17 which mesh with eachother so that the shafts rotate in unison. Although the shafts 14 and 15 may be manually operated, one of them is preferably connected by apparatus (not shown) to power actuated driving mechanism so that the machine may be continuously operated when it is in use.

The shafts 14 and, 15 have enlarged central portions 14b and 15b located between the bushings 16 and journalled in surrounding cylinders or drums 18, two of which are provided for each shaft. These drums are secured to the frames 13 by studs 19, the heads of which are located in recesses formed in the inner faces of the drums as shown in Fig. 7. Each shaft is thus journalled in its own bushing 16 and also in its associated drums or cylinders 18.

The inner faces of the two drums 18 of each shaft are spaced apart and in these spaces there are

mountedtwo disks

20 and 21 which are fixed upon the shafts 14 and 15, respectively, and which are adapted to rotate in the direction indicated by the arrows 22 shown in Fig. 6. The upper disk 20 is provided on its peripheral surface with a plurality of radially projecting pins 20a which are adapted to engage the index holes in the metal strip when this strip is passed between the two disks in the direction indicated by the arrow 23 in Fig. 6. The pins 20a, after passing through the index holes 10a are adapted to be received by recesses 21a formed in the lower disk 21. Of course, this registration of the pins 20a and recesses 21a with respect to the holes 10a in the metal strip occurs only when these parts are at, or in proximity to, a vertical plane containing the axes of the shafts 14 and 15. By this registering means, the metal strip 10d being operated upon and its sharp portions 10g are located always in proper relationship to the parts carried by the

disks

20 and 21 which operate upon the sharp projections 10g to bend them transversely to the strip.

The upper disk 20 has fixed thereon and projecting laterally therefrom in opposite directions two series of equally spaced fixed dies 20b and the disk 20 also has pivotally mounted thereon, and on each side thereof, an annular series of relatively movable die members 200 which are pivotally mounted on the disk by means of pins 24 and spaced equal distances apart. Each pivotally mounted die member 200 has a body portion 20d which has an inner curved surface adapted to rest normally upon the outer cylindrical surface of one of the drums 18 and each die member 20c also has a radially extending part 20a adapted to cooperate with the fixed die members carried by the disk 21. In effecting the bending of the sharp edge portions 10g of the metal strip, the portions 20d of the die members 20c trail behind the pivot pins 24 as the disk is rotated.

Similarly, the other disk 21 is provided with two series of relatively fixed dies 21b which are spaced apart equal distances around the periphery of the disk and which project laterally from both edges of the disk for cooperation with the movable die members 20c which are mounted upon the other disk 20. The disk 21 also has mounted thereon two series of pivoted die members 210 which are pivoted on the disk by means of pins 25. These die members 210 are similar to the die members 200, each comprising a body portion 21d having an inner curved surface adapted to coact with the peripheral surface of a drum 18 and having also an outwardly extending portion 21c adapted to cooperate with the stationary die members 20b of the other disk in effecting the sharpened portions 10g which have been formed along the edge of the metal strip.

In the operation of the machine, the metal strip 10d, which has been slitted along the lines 102 and 10 is moved through the

disks

20 and 21 in the direction of the arrow 23 by the engagement of the pins 20:: with the holes 10a in the strip and by the engagement therewith of the die members which are then operating to bend the portions 10g of the strip. Assuming that one of the sharp slitted portions 10g is approaching the ad jacent parts of the

disks

20 and 21, and assuming that this part 10g is in position to be engaged by a die mem her 200 on the upper side of the strip, as viewed in Figs. 6 and 8, the portion 20c of the pivoted die member 20c engages the upper side of the metal strip and bends it downwardly and outwardly against the adjacent die 21b which is carried by the disk 21, as shown particularly in Fig. 8. The die member 21b has a face 21), extending in a general radial direction in relation to the axis of the disk 21, against which portion 10;; of the metal strip is bent. At the same time, the edge portion of the strip 10d at and adjacent to the base of the portion 10g coacts with an inclined surface 213 of the die 21b, as shown in Fig. 8, with the result that the edge to form one of the

barbs

10b or 100.

portion of the strip is bent upwardly as shown at 10k. This upward bending of the edge portion of the strip determines the direction in which the part 10g extends Some of the die surfaces 21g are inclined in such a direction that they cause the barbs to be directed in the manner of the barbs 10b, as shown in Fig. 2, and other die surfaces 21g are inclined at another angle so as to cause other barbs to be directed in the manner of the barbs 10c.

The inclined faces 21g of the dies 21b are shown in Figs. 4 and 5 and their different inclinations result in the different angles of the resulting barbs.

The end faces 21f and the'inclined faces 21g of the dies 21b are arranged differently on alternate die members and the die members 20b carried by the disk 20 are similarly formed to cooperate with the pivoted die members 210 on the disk 21. The slits 10a and 10f in the metal strip 10d are staggered with respect to each other on opposite sides of the strip and the arrangement of the dies 20b, 20c, 21b and 210 on the disk is such that the portions 103 of the strip on opposite sides of the strip will be engaged and bent alternately in succes' sion as the strip moves between the disks, with the result that the slitted portions 10g are rapidly bent from the plane of the strip to the various positions which are shown in Figs. 1 and 2, thereby resulting in the rapid production of a flexible barbed band capable of the uses which have been referred to above.

In the operation of the machine, the pivoted die memhers 20c and 210 normally contact the cylindrical surfaces of the associated drums 18 and, in order to prevent the

parts

20e and 21a of the pivoted die members from catching on the relatively fixed

die members

21b and 20b, -respectively,-when a pivoted die member and a fixed die member are moving away from the zone where the bending operation takes place, the drums 18 are provided with recesses 18a, extending through considerable distances on both sides of the vertical plane passing through the axes of the shafts 14 and 15, so that the tail portion of a pivoted die member 200 or 210 is permitted to move into the adjacent recess to allow the pivoted dog to tilt so that the

arm

20a and 21e thereof will pass by the adjacent relatively

fixed die

21b or 20b.

From the foregoing description it will be seen that the present invention provides means by which a barbed metal band may be quickly and economically produced from a metal strip with a minimum of attention on the part of the .eperator and with uniformity in th ,,r esu1ting product.

Although one form of the "invention has-been shown and described by way of illustration, it will. beunderstood that it may be constructed in variousother ,formslwhich dies supported. adjacentto the-pathiof movement of the strip, and movable with the stripon 'oneside thereof, each of said dies having one face extending transversely to the plane of the strip and to the direction of movement of the strip and having a second face extending at an angle to the plane of the strip, and other dies movable with the strip and into contact therewith on the other side thereof for bending the edge of the strip on said second named faces at the bases of said pointed portions and for bending said portions on said first named faces to form projecting barbs.

2. A machine for use in forming a barbed metal band from a fiat metal strip having its edges slitted diagonally to form attached pointed portions, comprising means for supporting the strip during endwise movement thereof, dies supported adjacent to the path of movement of the strip and movable with the strip on one side thereof, each of said dies having one face extending transversely to the plane of the strip and to the direction of movement of the strip and having a second face extending at an angle to the plane of the strip, other dies movable with the strip and into contact therewith on the other side thereof for bending the edge of the strip on said second named faces at the bases of said pointed portions and for bending said portions on said first named faces to form projecting barbs, said second named faces on successive ones of said first mentioned dies having difi'erent angles with respect to the plane of the strip whereby the barbs are directed at different angles with respect to said plane.

3. A machine for use in forming a barbed metal band from a flat metal strip having its edges slitted diagonally to form attached pointed portions, comprising means for supporting the strip during endwise movement thereof, and two series of dies supported adjacent to the path of movement of the strip on opposite sides of each edge of the strip and movable therewith for bending the pointed portions during the travel of the strip to form barbs directed at angles to the plane of the strip, each of said series comprising a plurality of relatively fixed dies and a plurality of other dies arranged alternately therewith, said other dies of each series being adapted successively to engage the pointed portions and to bend the same on said fixed dies of the opposite series.

4. A machine for use in forming a barbed metal band from a flat metal strip having its edges slitted diagonally to form attached pointed portions, comprising means for moving the strip endwise, and two series of dies supported adjacent to the path of movement of the strip on opposite sides of each edge of the strip and movable therewith for bending the pointed portions of the strip during the travel of the strip to form barbs directed at angles to the plane of the strip, each of said series comprising a plurality of relatively fixed dies and a plurality of pivoted dies arranged alternately therewith, said pivoted dies being adapted successively to engage the pointed portions of the strip and to bend the same on said fixed dies of the opposite series when urged thereagainst, means for normally preventing pivotal movement of said pivoted dies and for urging said pivoted dies toward said relatively fixed dies of the opposite series, and means for permitting said pivotal movement of a pivoted die after a bending operation has been performed thereby to clear the associated relatively fixed die.

5 A machine for use in forming a barbed metal band afrom" a flat meta l strip having its edges slitted diagonally tofiform attached, pointed portions,fconiprising parallel shafts, means for rotating said shafts in unison, a pairiof aligning disks securedonsaidshafts a'nd'adapted to move astrip endwise therethrough and dies mounted ,on opposite sides of thep'eripherybf eachof said disks in angularly spacedpos itions and in overlappingrelationship with the dies mounted on the other .disk for cooperating there- Qwithin bending-the pointed: portions .of the strip away from the plane ofthe strip. p

6. A machine Iforuse. informing abarbed metal band :.from aflat :metal strip having itsedges slitted diagonally to formattachedpointed portions, comprising parallel shafts,

.means. for rotating saidshafts intunison, a pair of aligning disks secured on said shafts and adapted to engage the opposite sides of a strip and to move the strip endwise therethrough, and a series of dies mounted on each side of each of said disks, each of said series comprising a plurality of dies mounted in fixed position on a disk and a plurality of dies which are pivoted on that disk in alternation with said fixed dies, said pivoted dies on one disk being adapted upon rotation of said disks to be moved into overlapping relationship with and toward the fixed dies which are radially opposite thereto on the other disk for bending some of the pointed portions away from the plane of the strip and thereafter being pivoted away from the associated fixed die to provide clearance therebetween.

7. A machine for use in forming a barbed metal band from a flat metal strip having its edges slitted diagonally to form attached pointed portions, comprising parallel shafts, means for rotating said shafts in unison, a pair of aligning disks secured on said shafts and adapted to engage the opposite sides of a strip and to move the strip endwise therethrough, and a series of dies mounted on each side of each of said disks, each of said series comprising a plurality of dies mounted in fixed position on a 'disk and a plurality of dies which are pivoted on that disk in alternation with said fixed dies, said pivoted dies on one disk being adapted upon rotation of said disks tobe moved into overlapping relationship with and toward the fixed dies which are radially opposite thereto on the other disk for bending some of said pointed portions away from the plane of the strip and thereafter being pivoted away from the associated fixed die to provide clearance therebetween, said fixed dies having surfaces on which the pointed portions of the strip are deflected at different angles with respect to the plane of the strip.

8. A machine for use in forming a barbed metal band from a fiat metal strip having its edges slitted diagonally to form attached pointed portions, comprising parallel shafts, means for rotating said shafts in unison, a pair of aligning disks secured on said shafts and adapted to engage the opposite sides of a strip and to move the strip endwise therethrough, and a series of dies mounted on each side of each of said disks, each of said series comprising a plurality of dies mounted in fixed position on a disk and a plurality of dies which are pivoted on that disk in alternation with said fixed dies, said pivoted dies one one disk being adapted upon rotation of said disks to be moved into overlapping relationship and toward the fixed dies which are radially opposite thereto on the other disk for bending some of said pointed portions away from the plane of the strip and thereafter pivoted away from the associated fixed die to provide clearance therebetween, said fixed does having surfaces on which the pointed portions are deflected at different angles with respect to the plane of the strip and having other surfaces on which the pointed. portions are bent by said pivoted dies into positions transverse to the plane of the strip,

9. A machine for use in forming a barbed metal band from a flat metal strip having a longitudinally extending intermediate body portion and having its edge portions slit diagonally to form pointed elements attached to the intermediate body portion of the strip, comprising a pair of wheels mounted for rotation with the peripheral surface of one wheel closely spaced with respect to the peripheral surface of the other for progressively receiving and closelyconfining the intermediate body portion of the strip therebetween during endwise movement of the strip between said wheels, a die member fixed upon a first one of said wheels alongside the said peripheral surface there of, said die member having an end face thereon and having a second face extending diagonally outwardly radially and axially from one side of said peripheral surface of said first wheel, means for indexing the longitudinal movement of the strip with respect to the rotation of said wheels so that the base portion of one of the pointed elements will be engaged and will be bent out of the plane of the strip by said second face of said die member as the intermediate body portion of said strip is closely confined and advancedendwise between said peripheral sur (faces of said wheels, and a second die member on the second one of said wheels for bending the last mentioned pointed element across said end face of said first die member during the endwise movement of the strip.

References Cited in the file of this patent UNITED STATES PATENTS UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 2,915,161; December 1, 1959 George E Rasmussen It is hereby certified that error appears in the printed specification of the above numbered patent requiring correct-ion and that the said Letters Patent should read as corrected below.

Column 6, line 59, for "one", first occurrence, read on line 65, for "fixed does" read fixed dies Signed and sealed this 24th day of May 1960.

(SEAL) Attest:

KARL AXLINE ROBERT C. WATSON Attesting Oflicer Commissioner of Patents