US1206302A - Corrugated-fastener machine. - Google Patents

Description

S. C. CARY & H. H. BRAND.

CORRUGATED FASTENER MACHINE.

APPLICATION FILED 001.8.191/1.

l1 ,QU Patented Nov. 28, 1916.

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SPENCER C. CARY AND HERMAN BRAND, OF NEVI YORK, N. Y., ASSIGNORS TO CARY MANUFACTURING CO., OF BROOKLYN, NEW/V YORK, A CORPORATION OF NEVI YORK.

CORRUGATED-FiSTENEE MACHINE.

Specification of Letters Patent.

Patented Nov. 28, Mliti.

Application filed @ct-ober 8, 1914. Serial No. 865,678.

To all whom 'it 'muy concern Be it known, that we, SPENCER C. CARY and HERMAN H. BRAND, both citizens of the United States, residing at the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented a' certain new and useful Corrugatedlfastener Machine, of which the following is a specification.

This invention is a machine for producing corrugated fasteners.

in the art of metal fasteners there is a. well known product consisting of a length of corrugated metal provided with a toothed driving edge, said driving edge being formed with points of a forni termed saw teeth.

lt has been customary heretofore to first corrugate a piece of metal stock having the appropriate width, gage or thickness and temper, and to thereafter manipulate said strip to produce the saw teeth on the driving or penetrating edge. Such subsequent manipulation has been performed in diiferent ways, the most common of which has heretofore been by grinding bevels on the respective faces of the corrugated strip. lt

has been proposed, also, to cut away the metal by cutters alleged to act with a single cutting stroke, said single stroke cutters moving in a path inclined to the median line of the strip.

in a prior application filed by us on Dec. 2l, 1918, Serial No. 809,617 Awe have disclosed a machine for making corrugated fasteners which embodies, among other mechanisms, certain rotary milling cutters operating on the respective faces of the strip to produce bevels resulting in the saw point teeth. All such prior tooth forming operations, however, necessarily result in the removal of metal from the corrugated stock, but notwithstanding that a great amount of study and experiment has been devoted to the subject there are certain probleinsin the manufacture of corrugated fasteners'which have been unsolved until our present invention.

@ne chief difficulty in the rapid and economical manufacture of saw tooth corrugated fasteners has been to determine with accuracy and precision the location of the points of the teeth in the median plane of the fastener at the driving edge thereof, and another difficulty has been to produce sharp points on the teeth of said fastener. Manifestly, the points should be located in the median plane of the fastener for the reason that should the points be at one side or the other, the fastener will not drive straight into the wood, and, again, dull points on the teeth will interfere with the easy and rapid penetration by the fastener.

lt is well known that there are variations in the metal stock, both in respect to its gage and to the quality or texture of the meta-l; the thickness may and frequently does vary one, two or more gages, and the metal may be hard or soft according to the treatment accorded thereto. Such variations in the metal have resulted in more or less imperfections in, and increased the cost of production of, the articles.

The object of this invention is to obviate the foregoing and other difficulties, whereby we are enabled to produce saw tooth corrugated fasteners economically and rapidly, such articles being characterized, mainly, by the location with precision of the points in the median line of the fastener and by the presence of ysharp points on the teeth.

, According to this invention the corrugated metal stock is not cut away on the driving edge to form the bevels, as has heretofore been customary when the stock is subjected to the action of grinders or cutters, but the salient feature consists of means, preferably in the forni of dies, for displacing the metal cf the corrugated stock by a compressing action of said dies so as to impart the required bevels preliininarily to the stock on the respective faces thereof and at the driving edge. The metal displaced or compressed by the action of the dies fills in the spaces between the corrugations, thus resulting in fillets on the driving edge, but subsequently to the compressing or swaging action of said dies, the metal stock is subjected to further treatment, preferably by clearing dies, which remove or cut out the fillets so as to result in the production of saw teeth the points of which lie in the median plane of the fastener.

@ther features and advantages of the invention will appear in the course of the following detailed description.

ln the drawings, Figure 1 is a side ele ration of a machine for producing corrugated fasteners embodying the present iuvention. Fig. Q a sectional plan view of n the machine shown in nig. l, the plane 0i the section berno' below the reci rocating C head carrying the swagingV dies and the fil- VVlet clearing' dies -i'llustratino more Darticularly theineansfor guiding themetal stock Vand for'ixedly clamping the corrugated stock inthe several positions required to be assumed byY said stock during the operations of Vthe swaging dies and the illet clearing dies; l 3,4, 5 and@ are vertical sections on the planes indicated by the dotted lines 'Le-fl, and 6&6, respectively, of Fig. l to illustrate tlie'gswaging, pointing andthe two fillet vclearing operations performed by the respective dies. Fig. 7 is a de ail'perspective View of a portion of one of the fillet clearing dies. F ig. 8 is a side elevation oi the metal showing the successive operations thereon whereby the driving edge Vis iirst'ccmpressed, said edgeis pointed so as to accurately locate the points in the .plane t the median line of the fastener, and to successively remove the iillets from lthe re Y spective faces of the corrugated and swaged strip.

i designatesv a horizontal stationary bed supported at a suitable elevation in any way Y and B is a guideway for areciprocating head to which Vmotion is communicated Jrom any suitable source andby appropriate means, such for example the pitman c. '-Tll` Y lne head C is iitted for sliding movement in the'uidewa'* B so as to bel limited to re,-

CD l

Y Y ciprocating movement in a rectilinear path relative to the bed A. Said reciprocating head VC is equipped with a series of dies, herein shown as four in number and indicated by the reference characters l) E F G. Said dies perform several operations upon the driving edge of the corrugated stock, the

die D operating mainly to'displace the meta-l without cutting or removing it so as'to pre liininarily 4erin bevels upon the respective faces or saidy corrugated stri J, whereas the die Ewhentlie latter is employed produces sharp points upon the teeth and coperates with the die D in accurately locating said points in the median plane of the fastener,

` terial without deliection.

Prior to the action of VtheV dies upon the metalstock the latteris corrugated by any suitabletform 'of corrugating mechanism occupying a-de'sired relation to the bed so that a continuous stripof metal will pass from the co'rrugating mechanism to the bed for ,Y Y Y 1,206,302

the purpose of presenting the corrugated stock in the p; th of the dies. The metal strip oi a desired gage and texture is supported and fed to the machine in substantially the manner and by substantially the means disclosed in our prior application Serial No. 809,617, to which reference has been made, but as the means for suliporting and feeding the metal stoclr and for corrugating said stoer are not essential features of the present invention, we have not considered it necessary to illustrate or descr'be the same in detail herein. Merely for the purpose o'l illustration we have indicated in a conventional way the corrugating mechanism as consisting oi corrugating rolls Il lfi, the same being suitably supported and provided at their peripheral portions with teeth adapted to act upon the metal stock S so as to produce the corrugations in said stock as it is Yfed between the rolls. As shown, the ceri'ugating rolls are adjacent to the bed and in alinement with a guideway I on said bed, through which guideway the corrugated metal stock is directed and by which said stock is properly presented to the several dies, but it will be understood that other forms ofV corrugating mechanism may be employed and that the corrugating rolls herein shown may occupy any desired relation to the bed and guideway I therein; in fact, thc corrugating rolls may be at one sido ot the guideway in the bed so as to produce a loop in the metal stock, whereby a. permanent allowance of slack will result in the metal, stock, as a result or' which the c 1-rrugated metal stock will not be under tension 'or drawn taut between the corruga'ing rolls and the guideway I of the bed.

The guideway I for the corrugated stock extends longitudinally with respect to the bed A, one wall c' et said guideway beingintegral with said bed whereas the other wall is formedl by parts either integral with the bed or removably fastened thereto. 'lhc Vwall z' is perpendicular except for a section c7 thereof, the latter being inclined in one direction to the plane of the wall. The other wall of the guideway l is formed in part by permanent sections 2 integral with the bed, and intermediate these permanent sections are positioned the stoclndirectin 3,` plate J and two clamping plates K L. One section 2 of the bed is provided with a. face 3 inclined in an opposite direction to the iaee c" of the guideway, and immediately opposite tothe iace 2"" is another clamping member M, the purpose of which clamping members will presently appear.

The stock directing member .l is shown as a flat plate slidable on the bed A toward and from the Iguideway and with this slidable plate J coperates a corrugated or toothed roll J. the latter being adapted for engagement with the corrugated metal stock Cir so as to cooperate with said plate J in properly directing the metal stock into the guideway l. rlhe toothed roll J is mounted for idle rotation on the bed A in any suitable way. As shown, the guide plate J is provided with a slot y' into which slot eX- tends a post 7" which is fast with the bed A, aid post serving to limit the plate J to movement in a rectilinear path with respect te the guideway I. `Within the slot y' of plate J is positioned a coiled spring J2, the latter being seated at one end against the guide post j and at its opposite end against a wall of the slot 7' so that said spring J2 acts on the plate J to normally press it toward the toothed roll J.

The .swaging die is illustrated more particularly in Fig. 3, the same being shown as a solid block of metal secured in any dev sired way, as by a set screw d, in the lower part of the reciprocating head C. The die is provided at its lower end with a groove D', the walls d of which are inclined relative to each other at predetermined angles. Said swaging die D is movable with the head C toward and from the guideway I and the path of the corrugated stock movable in said guidway, and upon the downward movement of the head C the groove D in the swaging die is broiiight into contact with the upper driving edge of the corrugated stock, whereby the walls d of said swaging die groove will act upon the upper driving edge of the stock in a manner to compress the metal of said stock. As a result of this operation one wall (Z of the swaging die acts on the metal to produce an inclined fillet s on one face of the metal stock, whereas the other inclined wall d acts on the metal to produce a reversely inclined lillet on the other face of the stock, whereby oppositely inclined bevels are produced on the respective faces of the metal stock, the stock at this stage of its manipulation being in the condition shown at the left in Fig. 8. The operation of the swaging die upon the metal stock requires that the stocl shall be held fixedly in position, and to this end the stock S is fed in the guideway for the lower or bottom edge of the stock to bear firmly upon the bottoni wall 4 of said guideway, whereas the stock itself is clamped laterally against the wall a' by the action. of the clamping plate K. shown, the clamping plate K is provided with a longitudinal slot 7^y into which projects a guide post Zr provided on the bed said slotted plate containing a spring K operating on the plate to move it in a direction away from the guidewav l. The clamping plate l is iiroviiled with a lug c2 the upper face of which is beveled at k3. With said lug of the plate K coperates a depending stem K2 secured fixedlv to the head C., said stem be- .ing provided with a beveled face k? see Fig. The depending stem K2 extends below the operating face of the swagine` die D, said stein being positioned directly over and in the vertical plane of the inclined face 7a3 of the upwardly extending lug t2 on the clamping plate. Now upon the descent of the swaging die toward the stock the stem K2 moves downward at the same time as said swaging die and the inclined face 7e* of said stem contacts with the inclined face k3 of the lug of plate K, such contact of the stem with the lug being in advance of the contact of the die with the stock, whereby the plate K is forced by the stem K2 against one .side of the metal stock S for clamping the latter firmly within the guideway so that said metal stock is held immovably before and during the operation of the swaging die upon the upper driving edge of the stock. Upon the upward movement of head C and die D away from the stock, the stem K2 is withdrawn from the lug of the plate K., whereupon the spring K presses said plate l away from the guideway I releasing the metal stock and permitting the latter to be fed in the direction of its length for a predetermined distance. From .the foregding description it is apparent that the swaging die operates upon the edge of the metal stock to produce oppositely inclinedbevels thereon, and, further, that said die acts to displace the metal instead of removing it or cutting` it out, the action of the die taking place with precision so as to locate the bevels and to bring the points of the resulting teeth in the median plane of the corrugated strip.

The bevels produced on the corrugated stock by the action of the swaging die may result in teeth which are not quite sharp enough to readily penetrate the wood or other material into which the fastener is to be driven, and to produce teeth with sharp points as well as to accurately locate the points in the median line of the fastener it is preferred to employ an additional die E which, for the purpose of conveniently designating it,fwill be herein referred to as the pointing die. Said die E is posi-y tioned next to the swaging die D. It con-l sists of a solid block of metal with a groove E in the lower end face thereof, the walls c of said groove being at a greater angle to each other than the walls d in groove D of the swaging die. Die E is secured in the reciprocating head C so as to be directly over guideway I, said die E being secured Xedly in the reciprocating head as by means of the set screw c. The die E operates upon the beveled face corrugated stock. but the walls e of said pointing die meet each other at suoli an angle that said walls act only upon the points of the bevels .s on the stock, whereby die E serves a useful function in imparting sharp edges at s to the beveled portions of the stock. This die E thus operates with a further swaging ac-- tion Vupon the stock to point the resulting Y Y teeth at s in the'second viewto the left of stock is directed between the Walls z' inner edge of fixed guide plate N.

For the purpose of removing the metal Vfillets constituting the bevels on the respective faces of the metal stock We employ the dieiF to remove the'fillet constituting one bevel on one face of the stock and asimilar die G to, remove the fillet constituting the bevel on the opposite face of the stock, said dies F G acting successively on the metal. Said dies F G are positionedone alongside the other and both being carried by the reciprocating head formovement in a rectilinear path therewitlnfsaid dies FVG being fitted removably in the head and retained fiXedly in' position therein by suitable clamping devices, such as the screws f g, respectively.

VThe clearing die F operates upon the fillets which constitute the bevels s on one face of the corrugated strip, and to effect the proper removal ofthese fillets the corrugated strip is inclined relative to the path of the clearing die F because said clearing die moves in a rectilinear path and it is desired to merely cut out the metal forming the fillets and bevels von one face of the stock. Accordingly, .the metal stock is deflected toward the inclined face of guide- Y' Way I by the action of a stem O on a lug Z of the clamping member L. The stem O is shown in Fig. vas having a beveled face o adapted for contact With the beveled face 0 on the lug Z, and as the clearing die F descends the stem O acts on the plate L to force the latter into contact With the metal stock S, therebyv forcing said metal stock into an inclined position against the faceof the guidevvay," all as shown in Fig.k 5. Said plate Lis fitted slidably on the bed A, being guided by a post Z2 which operates in a 'slot' Z3 of the plate, but normally the plate is retracted from the guideway by the action of a spring L positioned Within the Vslotted part of the plate, see Fig. 2. The

clearing die F is provided with Va corrugated face f corresponding to the eorrugationsY in p the metal stock, and when the corrugated stock is clamped fiXedlyin position and inclined to the path of the clearing die, the lower edge of said die acts upon the metal constituting the fillets or bevels 'on one face of said 'stock so as to cut out said metal fillets, this operation being indicated at s2 in the third view of the metal stoel; shown in Fig. 8, during which clearing operation of the fillets the die acts on the metal at the alternate corrugations.

Subsequent to the operation of the clearing die F the same length of metal stock is acted upon by the other clearing die G, the latter operating to remove the metal con stituting the fillets or bevels on the other face of the corrugated stock. lVhcn the die Gr operates on the stock, the latter is moved into an oppositely inclined position from that which it assumes when the die F acts thereon and, accordingly, the metal stock is defieeted into contact with the beveled face 3 of the guideway, such deflection of the metal stock being due to the pressure of clamping plate M. It will be noted by reference to Fig. 2 that the clamping plate L is positioned at one side of the guideway I, whereas the other clamping plate M is positioned at the opposite side of the guidcivay I, and thus the clamping plate L moves in a direction toward the beveled face c when the clearing die F is to act upon the stock, Whereas the other clamping plate M moves in an opposite direction and toward the inclined face 3 when the other clearing die Gr becomes effective in acting upon the stock. The clearing die G is provided with a corrugated face g corresponding to the metal stock and similar to the face f of the clcaring die F, but as the die G is to act upon the face of the stock opposite to that acted upon by the die F, it is apparent that die G should be positioned in erosshead C reversely to die F; in other Words, the corrugated surface of die F faces in one direction whereas the similarly corrugated surface of die G faces in an opposite direction, all as indicated in dotted lines in Fig. 2. In addition to perfoiming the function of removing the metal on Well defined lines from the fillets produced on the surfaces of the corrugated strip, the clearing dies F, G, operate on thc metal of the strip so as to produce bevels on the edge, Which bevels are in the concave portions of the corrugated metal.

From the foregoing description it will be understood that the corrugated strip on one edge thereof is compressed in two directions oppositely inclined to each other and result in the main bevels upon the convex portions of the strip; that the metal in said bevels is cut out along certain definite lines to produce the saw teeth, at which time any rough edges on the teeth, or in the spaces between thenn are removed by the clearing dies F, G, after Which the points of the saw teeth are compressed so as to centrally position said points and to sharpen them. The initial compression of the edge of the corrugated strip produces, as stated, bevels on the concave surfaces, which bevels are changed into well defined saw teeth by cutting the metal in said bevels on definite lines, so that in the operation of dies F, G two results are obtained, first, teeth are cut and rough edges on the teeth, and in the spaces between the teeth, are removed and, second, the dies act to shear the edge of the metal in the concave surfaces of the corrugated strip so as to produce bevels on said edge and in the concave portions of the strip, the net result being a continuous serrated cutting edge in a smooth sharpened condition, and free from roughness or irregularities. rlfhe dies F, Gr, are each provided with a corrugated face f (see die F in Figs. 5 and 7 and die G in Fig. 6) whereby said corrugated faces of the dies conform to the corrugations of the strip, and in the operation of these dies upon the corrugated strip, said strip is presented first at one angle to the path of die F (see Fig. 5) and then in a reversed angle to the path of the die (see Fig. G), whereby the corrugated edges of dies F, G, operate upon the swaged strip to cut the saw teeth and operate in the spaces between said saw teeth for the purpose not only of removing the burs from said teeth and edges but for the performance of the additional function of producing bevels on the edge of the corrugated strip, which bevels are in the concave portions of the strip, as clearly shown by Figs. 5 and 6, and which bevels in said concave portions of the strip are additional to the bevels produced in the convex portions of the strip by the action of the compressing dies.

rlhe clamping plate M operating in conjunction with the second clearing die G is constructed similarly to the clamping plates K L, that is to say, said plate M is provided with a slot m into which projects a fixed guide post fm and within which is positioned a spring M. Said plate is provided with an upstanding beveled lug p with which cooperates a depending stern P on the crosshead C, said stem having a beveled end adapted to contact with the beveled face of the lug, for the purpose of pressing the plate M against the stock, whereby the stock is brought into contact with lthe inclined face 3 of the guideway, so that the stock is clamped fixedly in an inclined position and in the path of the corrugated face on the clearing die G.

The operation may be summarized as follows: rlhe metal stock S consists of plain non-corrugated metal of the required width, gage and texture. The stock is fed through the machine by suitable feed mechanism operating, as disclosed in the prior application to which reference has been made, to impart intermittent movement to said stock. The metal passes between and is subjected to the action of the coperating rolls H H which corrugate said metal, whence the corrugated metal passes into the guideway I and said metal is directed by the coperating plate J and roll J. All the dies D E F G reciprocate vertically with the head C,

and upon the downward movement of this head a length of stock S is gripped firmly in position within the guideway by the plates K L M, whereby all the dies act simultaneously upon the corrugated stock. The dies D acts first on the stock by compressing' a portion of the driving edge of the metal so as to produce fillets or inclined bevels upon a predetermined length of stock, one of said bevels being indicated at s in Fig. 8; thereafter the stoclr is moved a predetermined length so that the pointing die E acts upon the points or apices previously produced by the die D upon the stock, thereafter the stock is again moved for the clearing die F to remove the metal constituting the fillets or bevels 8 and finally the stock is moved beneath the die G which operates to cut out metal at s which previously formed the fillets or bevels on the opposite face of the stock. lt is thus apparent from the foregoing description that the intermittent movement of the metal stock brings successive portions of said stock into position below the several dies, and as a result of the operation of the dies the metal is first swaged to form the bevels without cutting or removing any of the metal, the pointing die and the swaging die cooperate in accurately locating the points of the resulting teeth in the median plane of the strip, and the dies F Gr act on the respective faces of the strip in cutting out the fillets constituting the bevels. Fasteners produced on a machine of this invention will drive straight into the wood without a tendency to become deflected, and. will easily penetrate the wood or other material, for the reason that the teeth are accurately positioned upon the driving edge of the fastener and the teeth are sharpened so as to cleave their way into the material.

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

l. ln a corrugated fastener machine, the combination with means for feeding a length of corrugated stock, of a ewa-ging die operating to compress an edge portion of said corrugated stock, thereby producing embryo teeth with fillets, and means for removing said fillets.

2. ln a corrugated fastener machine, the combination with means for feeding a length of corrugated stock, of a swaging die having means acting simultaneously upon the respective faces of said corrugated stock for compressing an edge portion thereof to produce embryo teeth with fillets therein, and means for cutting out said fillets.

3. In a corrugated fastener machine, the

combination with means for feeding a length of corrugated stock, of means forV compressing an edge portion of said corrugated stock to produce embryo teeth thereon.

4. In a machine for producing corrugated fasteners, 'the v lcombination of means for sivaging an edge portion of corrugated stock to produce oppositely inclined surfaces l thereon, and cuttmgpmcans positioned for operation upon the sivaged edge for cutting metal therefrom on definite lines to produce Well defined saw teeth. i

ln-a machine for; producing corrugated Y fasteners,'the coi'nbination of swaging means operating'with compressive force upon an edgeportion of a. corrugated stoclrfor displacing themetal and producing inclined vex-'portions Vof said corrugated stock, cutting means for removing metal on Well defined* lines Vfrom said fillets, thereby producing saw teeth on the corrugated stock, andv means operating upon the points of said teeth to position the latter in the medial plane vofv the corrugated stock.

In a niachinefor producing corrugated fasteners, the combination of Y sWaging means operating with .compressive force uponwan edge portion of corrugated stock for displacing themetal thereof and producing inclined fillets upon the respective faces of said stock, aV pointing die movable toward the path" of said Vmetal stock and contacting ,with the edgev portion thereof for-pointing Y the metal, and means for cutting out the Viiiletsbetiveen the `Vcorrugations so as to re- Ysult-'i-n the production of, saiv teeth on 'the edgeof the metal stock.

8. vln a machine for producing corrugated fasteners, the combination ofa sivaging die operating ivith'compressive'force upon corrugated jstock adjacent the edge portion Vthereof'for producing oppositely inclined fillets' upon thesurfaces of. said stock, other dies positioned for cutting out the fillets on definiteV lines, thereby producing Well defined sawteeth, and a pointing die the action of Which'is' limited to the points of said teeth,"vvhereby the said points are sharpened by acompre'ssive action of said pointing die.

Y 9 ln .a Vmachine for producing 'corrugated fasteners, the combination of sivaging Vmeansy operating with compressive force 4upon zanedge portion of a length of corru-Y Ygated metal stock for producing fillets upon the respective faces of the metal stock, a plurality of clearing dies operating successively upon the swaged edge of said metal stock for cutting out said fillets, and means for presenting the metal stock in oppositely inclined directions to the successive action of the clearing dies.

10. ln a machine for producing corrugated fasteners, the combination of a swaging means operating with compressive force upon an edge portion of a length of corrugated metal stock for producing fillets upon the respective faces of the metal stock, a plurality of clearing dies movable relative to the path of the metal stock and operating suecessively thereon for removing the fillets from one face and then from the other face of said corrugated stock, and means for retaining tlie metal stock in an inclined position relative to one clearing die and in an oppositely inclined position relative to the other clearing die.

ll. ln a machine for producing corrugated fasteners, the combination of a guide- Way Within which is fed a length of corrugated metal stock, a sii/'aging die operable for compressing an edge portion of the metal stock, and stock-clamping means controllable by the movement of said die so as to fiXedly position and release said stock.

1Q. ln a. machine for producing corrugated fasteners, the combination of a guideivay Within which is fed a length of corrugated inetal stock, and a svaging die movable relatively to said stock for displacing metal from an edge portion thereof, said die being provided with a groove the Walls of which are oppositely inclined for exerting a compressive force upon the metal of the corrugated stock.

13. In a machine for producing corrugated fasteners, the combination of a guideivay Within Which is fed a length of coirugated metal stock, a swaging die provided with a groove the Walls of which are positioned at predetermined angles for exerting compressive force upon the edge portion of the corrugated stock, and a pointing die provided vvith a groove the Walls of which are relatively positioned at a different angle from the Walls in the groove of the swaging die so that the pointing die will act upon the swaged metal to point the same and to accurately locate the points in the median plane of the corrugated stock.

11i. In a machine for producing corrugated fasteners, the combination of a guideivay Within which isfed a length of corrugated nietal stock, sivaging means for displacing metal relatively to the edge portion of the corrugated stock so as to produce fillets thereon, clearing dies movable relatively to the siva ged edge of the metal stock, and means controllable by the movement of said clearing dies for retaining the metal stock in fixed position and in the path of said dies.

15. ln a machine for producing corrugated fasteners, the combination with a guideway within which is fed a length ofl corrugated metal stock, of a swaging die re ciprocable with respect to the guideivay for producing fillets upon the edge portion of the metal stock, a plurality of clearing dies also movable relative to the guidevvay, said dies being positioned for operation successively upon the swaged edge of the metal stock and operating to remove the metal fillets therefrom, and means for presenting the metal stock in a position inclined to the path of the clearing dies.

16. ln a machine for producing corrugated fasteners, the combination of a guidevvay, a clamping member movable relative thereto, a reciprocating die having means contacting With the respective faces of a length of corrugated stock for compressing the edge portion thereof, and means depend ent upon the movement of the die for imparting movement to the clamping member relative to the guidevvay.

17. ln a machine for producing corrugated fasteners, the combination of a guide- Way Within which is fed a length of corrugated metal stock, the Walls of said guide- Way being provided at intervals with reversely inclined lengths or sections, clamping members in cooperative relation to said inclined Walls, sWaging means movable relatively to the guideWay for operating upon the metal stock, clearing dies also movable relative to the guidevvay, and means dependent upon the movement of said dies for imparting movement to said clamping members.

18. In a machine for producing corrugated fasteners, the combination of sWaging means operating upon corrugated stock adjacent an edge portion thereof for producing oppositely inclined surfaces upon said stock, and dies provided With corrugated faces Which conform to the corrugations of the stock, said dies operating to cut metal from the inclined surfaces on definite lines for producing Well defined saw teeth.

19. ln a machine for producing corrugated fasteners, the combination of swaging dies operating upon corrugated stock adjacent an edge portion thereof and producing inclined surfaces upon said stock, cutting dies each having a face corresponding to the corrugations of the stock, said dies acting upon the inclined surfaces of the stock for removing metal therefrom on definite lines, and means whereby the cutting dies and the corrugated stock are relatively positioned for said dies to shear the metal in a plane inclined to the medial line of the corrugated stock.

ln testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses.

SPENCER C. CARY. HERlMlAN H. BRAND.

Witnesses:

A. S. BRANDES, H. MERKEL.

Copies of this patent may be obtained for ve cents each, by addressing the Gommissioner of Patents, Washington, D C.

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