US2927548A - Die set - Google Patents

Description

March 8, 1960 c. L. WELLINGTON 2,927,543

DIE SET 5 Sheets-Sheet 1 Filed July 10, 1957 INVENTORI CARY L. WELLINGTON March 8, 1960 c. L. WELLINGTON DIE SET 5 Sheets-Sheet 2 Filed July 10, 1957 FIEL'EI.

. INVENTOR'. CARY L. WELLINGTON March 8, 1960 c. WELLINGTON 2,927,548

DIE SET Filed July 10, 1957 5 Sheets-Sheet 3 F IE.

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March 8, 1960 I c. WELLINGTON 2,927,548

DIE SET Filed July 10, 1957 S Sheets-Sheet 5 CARY L. WELLINGTON United States Patent DIE SET Cary L. Wellington, Englewood, NJ., assignor to The Condenser Machinery C0rp., Englewood, N..l., a corporation of New York Application July 10, 1957, Serial No. 670,938 Claims. (Cl. 113-1) This invention relates to a novel die set construction and particularly to a die set for fastening together metallic sheets or the like.

in fastening sheet materials together it is sometimes 'desirable to use no fastener other than the materials themselves. One example of such a situation occurs in aflixing the tab or lead to a condenser plate, and in this case it is usually desirable that the sheet materials used in the tab and the condenser plate be of specific types of material treated in certain ways. In condenser constructions, it is desirable to avoid the introduction of a metal or other type of fastener which might prove chemically or electrically harmful to the condenser, and it is certainly desirable to avoid any mechanically inconvenient or bulky structure, particularly instances where the tolerances are extremely close. The use of the sheet materials themselves to form the needed connection therefore conveniently meet the requirements of condenser plate construction.

The present invention'employs aknown technique for fixing together metal foils or other'sheet materials which remain deformed, using nothing other than the sheet material. This is accomplished by piercing the sheet material in such a way as to displace, but not cut away, the material which is moved by the punch. Thereafter, the displaced material is peened or crimped down against the surface of the sheet material. This technique provides a relatively solid, secure bond which may be used to secure together two or more plies of sheet material. This technique heretofore has been applied by hand or by a few relatively simple mechanical devices which however are only semi-automatic in that they require manual aid. Known devices are therefore not useful in completely automatic tab applying equipment.

The present invention provides a high speed completely automatic die set for fixing together sheet metallic members of the type heretofore described. Moreover, the complete operation including the piercing and peening is accomplished in one stroke of the actuating mechanism and a single cycle of the die set so that it can be accompiished extremely rapidly. If desired, at the same time the sheets are fixed together, the die set may perforate one or more of the sheets for ease in separating a continuous web into useful lengths of material.

In terms of broad inclusion the die set of the present invention comprises a pair of pads adapted to receive plies of sheet material and movable to hold between them this sheet material in position for fastening. Means is provided for moving the pad together and apart. A punch adapted to displace rather than move sheet material is positioned to move through openings in the pads and to perforate the sheet material. Means is provided for movably supporting the punch relative to the pads. An anvil associated with one of the pressure pads is movable relative thereto at least partially to close the opening in one of the pads at the sheet engaging surface and a peening hammer is movable relative to the pressure pad and adapted to pass opposition to the anvil to crimp together against the anvil the displaced portions of the sheet.

For a better understanding of the present invention reference is made to the following drawings in which:

Fig. 1 shows a plan view from above of a preferred embodiment of the die set of the present invention;

Fig. 2 is a front elevational view of the die set structure of Fig. 1;

Fig. 3 is a side elevational view of the die set of Figs. 1 and 2;

Fig. 4 is a sectional elevational view taken along line 4-4 in Fig. 1;

Fig. 5 is a partial sectional side elevational view taken along line 55 of Fig. 1;

Fig. 6 is a partial sectional view taken along line 6-6 of Fig. 1;

Fig. 7 is a partial sectional view similar to Fig. 4 showing an early stage of operation of the die set;

Fig. 8 is a view similar to Fig. 7 showing a later stage of operation of the die set;

Fig. 9 is a similar view to Figs. 7 and 8 showing 'a still later stage of operation of the die set;

Fig. 10 is a similar view showing the die set at its limit of operation;

Fig. 11 is a detail view showing how a punch penetrates the sheet material;

Fig. 12 is a detail view showing the punched sheet material from below;

Fig. 13 is a detail view showing the anvil member laterally displaced into position to oppose the hammer member;

Fig. 14 shows in perspective a sample of sheet metallic members which have been fixed together by the die set of Figs; 1-10;

Fig. 15 is-a detail view showing the final joint between the metallic members;

- Fig. 16 is a detail view of a punch, element as employed in the present invention;

Fig. 17 is a detail view of the punched and secured sheet metallic members;

Fig. 18 is a detail view showing the feed region of the ribbon feed elements taken along section 1818 of Fig. 4;

Fig. 19 is a detail sectional view, partially in section, taken along line 1919 of Fig. 4;

Fig. 20 is a view similar to Fig. 5 showing a modified form of the present invention employing a perforator; and

Fig. 21 is an elevational view of the structure shown in Fig. 20 along lines 21-21 of Fig. 20.

Referring first to Figs. 1 to 3, it will be observed that in this instance a die set employing a plurality of aligned punch members 30 is employed. It will be obvious to those skilled in the art that the die set is equally applicable to a structure employing a single or a plurality of punches and that the punches may be arranged in some pattern o her than a single straight line.

..Broadly speaking, the die set consists of a pair of pads 31 and 32 arranged to receive metallic or other sheetlike material between them and movable, as may be seen in Fig. 7, to a position to hold the plies of sheet material between them in position for fastening. Means is pr0 vided for moving the pads together and apart, and in this instance the means consists of a movable plate 34 movable relative to a fixed plate 33, the movable plate, in this instance, being driven by the piston 35 of an air cylinder 36. As can best be seen in Fig. 4, the pad 31 is provided with openings to accommodate the punches 3i) and the pad 32 is similarly provided with openings which also accommodate the punches after they penetrate the material held between the pads. One of the pads, in this case 31, supports a slide 38 which is slidably mounted to be moved laterally with respect to the punches and the pads to provide an anvil. A plurality of hammer members 39 are arranged to pass through the openings in pad 32 and to drive punch displaced material back against the sheet material backed by the anvil slide 38 which has been slid into proper position. Thus, it will be seen that by a proper arrangement of parts a sequence of; operation is possible as follows: the punches 30 penetrate the sheet material 40 and 41 between the pads displacing some of the material in the direction of the movement of the punches but preferably cutting none of it away; the anvil 38 is overshifted to cover at least part of the region below which the punch displaced material lies; and finally, the hammers 39 are brought to bear against the displaced material anvil member and crimpmg or peening it into the sheet material against the. anvil member.

The construction of this particular embodiment of the invention will now be considered in some detail, bearing in mind the relationships of parts already established.

Referring again to Figs. 1-4, it will be observed that the. support for the. fixed plate 33 of the die set is obtained from the air cylinder 36 by use of a suitable base plate 43 which is fixed to the air cylinder. The. base plate 43, in turn, supports at least two columns 44 to the tops of which are fixed the fixed plate member 33 by screws 45 or other suitable means. These columns are preferably arranged at diagonally opposite corners of the fixed plate 33 and generally perpendicular to the broad surfaces of the plate, which is preferably of rectangular shape. Movable plate 34 which is also advantageously of rectangular shape is arranged generally parallel to plate 33 and provided with bushings 46 through which columns 44 pass at diagonally opposite corners so that plate 34 is slidable relative'to the columns toward and away from plate 33. In order to make the plate 34 movable, the piston rod 35 of air cylinder 36 or the other driving means is connected by the threaded stud end of the rod to a plate 47 which may be bolted to plate 34 using screws 48. The two plates are held apart by spacers 49 in order to distribute the pressure grom aircylinder over a wider area of the movable plate Fixed to the movable plate 34 by screws 48, or other suitable means, are a pair of columns 51 which extend upwardly toward and through plate 33. These columns bear cam surfaces which will be discussed more fully hereafter.

Also supported on plate 34 is the pad member 32. Pad member 32 is resiliently supported relative to plate 34 in such a way that it normally occupies a fixed position when in the position of Fig. 4 but can assume a modified position such as that shown in Fig. 10. This is accomplished by the use of guide posts 53 which permit movement of the pad only toward and away from the movable plate. These posts are preferably fixed to pad member 32 and extend in sliding engagement through plate 34 terminating in a head 5301 which provides a shoulder abutting a shoulder on plate 34' to limit movement in one direction. This shoulder may be in a counter-bored recess in plate 34. Urging the padf32 away from the plate 34 are springs 54 which urge the pad into the position shown in Fig. 4, the maximum spacing from the movable plate 34 permitted byscrew head 53a. These springs are preferably helical springs arranged around the guide post 53 and terminating at their opposite ends in wells in the pad and plate, respectively.

The approach of the pad 32 to the plate 34 is limited bystud stop members 58 anchored in the plate 34. Also passing through pad 32 are a plurality of openings of a sizeand shape to accept hammer elements 39, preferably in. sliding engagement. These hammer members may have reduced diameter shanks extending into plate 34 where they are-held in place by a key 56 which bears laterally against the shanks 57. The pad 32 may also be provided with a guide or'guides for the strip or sheet;materi'al' such as guide 59.- A screw-like stripper member 60, which has its threaded stud extending through the pad and terminating in a nut 61 which provides a shoulder bearing against the bottom of the pad is urged upwardly by a spring 62 in order to aid in freeing sheet material after operation of the die set.

The upper pad 31 is movable relative to the fixed plate 33 and is supported relative thereto in much the same way that the pad 32 is supported relative to plate 34. It will be observed that the pads and plates make a relatively parallel structure and provide what might be termed a sandwich within a sandwich with the sheet material. As in the case of the other pad, pad 31 is fixed to guide posts which are slidably mounted in fixed plate 33. Guide posts. 65 are diagonally positioned with respect to pad 31 and have heads 65a which provide shoulders which abut shoulders in counter-sunk portions of plate 33 in the rest position wherein pad 31 and plate 33 are at their maximum spacing'as limited bythe head provided shoulders. The pad 31. and plate 3.3 are urged apart into this position by spring members, 66 which, in this; case, are notv arranged around the posts, 65. but at one end extend through bores 67 through plate 33. and at the other end are arranged around studs 68 on pad 31. Springs. are of lighter and more easily compressed material than springs 54 so that they will tend, to yield beforeisprings 54 do. On theunderside of fixedv plate 33 are stop members 69 which limit the approach of pad 31 to plate 33 as springs 66are compressed.

Atop plate 33 is a. punch supporting plate '71. This punch supporting plate is adapted to be held against plate 33 by slidable latch members such as latch 73, but upon release of the latch is urged away from fixed plate 33 by springs 67 which bear against its bottom to urge it upward. Studs 72 fixed to plate 33 slidably fit holes in plate 71 and have shoulder-providing heads 724: which limit the upward movement of plate 71 away from fixed plate 33'. However, in the position shown, punch holder plate 71 is held against upward movement by latches 73 which overlie it and hold it against plate 33 in opposi tion to the pressure of springs 66'.

The punches 30 are arranged to extend vertically through holes in plate 71 which snugly accommodate them and are held in position preferably by the use of a cap plate 75 which is held against plate 70 by screws or other fasteners. The punches may be provided with laterally flattened areas at their tops 30a as shown in Fig. 16 so that they fit into a turn portion of their punch supporting plate 71 in the proper way. A key in cap plate 75 may be engaged ina keywayin plate 71 in position to bear against the flattened top areas 30:: to prevent the punches from turning.

As previously mentioned, latch means overlie the punch plate 71 to hold it against plate 33. As can be seen in Fig; 1, there are two latches 73 arranged at opposite ends of the punch supporting plate, and these latches are preferably slide members having beveled edges which mate with the beveled edges of slide supports 77 to hold the slide in place. The slide supports. are fixed in turn to plate 33. The effective parts of the latches are bifurcated to pass around posts 51 so that they each overlie the punch plates 71 in two places. Moreover, the slides are lightly spring loaded by a'slpring 78 which extends between arecess in the back end of the slide and a plate 79 fixed to slide support 77 at the end of the slide track. By means of the spring 78, the slide 73 is always urged to overlie the, plate 71. However, as will be observed; the post 51, whose flattened sides the bifurcated edges of slide 73 embrace, is provided with a cam surface 80 which opposes a cam surface 81 on the slide.

Also on the posts 51, or preferably on only one of them, is a notched region terminating near its bottom in a cam surface 83. This cam surface acts against the end of anvil slide'zmember 38 which, as seen in Fig. 3, is preferablya, beveled edge slide similar to that: used for the'latch 73 held in place by mating beveledg'es in pad 31. The slide is urged against the recessed portion of the column 51 by a light spring 84 between a portion of the pad across the end of the slide track and the slide anvil. The slide itself is provided with openings aligned with the openings in the pad which accommodate the punches 30 but which openings are larger at the top to permit an over-shifting of the slide so that, while the bottom shifts partially closing the openings through the two pads, the punches 30 will not serve as obstructions. The amount of anvil slide over-shift necessary in most cases is quite small and is therefore relatively easily accomplished.

In addition to the essential parts of the die set, there are a number of auxiliary parts which aid in guiding, spacing, cutting, etc. For example, as seen in Figs. 2 and 3 (dotted in Fig. 2) a roller 86 may be supported on brackets 87 on the lower pad 32 in order to keep a continuous web of sheet material 41, which is fed into the die set in the direction indicated in Fig. 3, at the level of the lower pad 32. The guide 59, on the other hand, guides ribbon-like strip. These die set associated parts are primarily aids to automatic feeding of tape and tabs and function to provide the ends desired in my copending patent application of even date herewith entitled Tabbing Device. The thin ribbon 40 is fed from a storage source between a pair of drive rollers 90 and 91 through a tubular guide 92 supported relative to the fixed plate from the knife-supporting structure 93 past the cut-off knife over guide 59 and, thence, over ribbon 41. The knife structure is a slide in a Hock 93 which is supported on fixed plate 33 below a slotted portion through which pass supporting bolts 96 which terminate in a plate 97 straddling the slot. The knife itself is affixed to a rod 98 which passes through plate 97 and is terminated in a shoulder-providing member 99. The knife is urged downwardly by spring 100. The knife edge itself is a slanted blade 102, which is the bottom edge of a recess which is positioned to normally bracket the ribbon 40 in one edge of the knife 94. It will be observed that the ribbon 40 has a concave surface fashioned by the rolls 91, 92 which gives it some rigidity and preserves its direction. The knife edge 102 is opposed by a stationary knife blade 193 fixed to the bottom of block 93 above the feed path of the tab material so that, when the knife 94 is driven upward, its edge 102 will sever the ribbon against knife edge 163.

In operation, a web or relatively wide tape sheet material is fed between the plates perpendicular to the section of Fig. 4 and a relatively narrow ribbon 40 is fed between the plates from the side and between rolls 90 and 91 as shown. The ribbon is positively driven when the drive wheels 98 and 91 are together to provide a shaping and frictional drive of the ribbon. Drive is stopped by separating the wheels as shown in Fig. 18 when the piston rod 35 of the air cylinder 36 drives the movable plate 34 upwardly toward the fixed plate 33. In driving plate 34 upwardly pad 32 is also driven upwardly underthe spring pressure of springs 54 until the pads 32 and 31 are brought together sandwiching metallic strips 40 and 41 in superimposed relationship between them, as seen in Fig. 7. From the position shown in Fig. 7, the die set moves to the position shown in Fig. 8 still under the driving influence of piston rod 34 which moves plate 34 upwardly. This moves pad 32 upwardly and hence drives pad 31 upwardly in view of the relative weakness of springs 66 compared with springs 54. The upward movement of the pads stops, however, when the upper pad 31 strikes stop members 69 on fixed plate 33. In the meantime, however, movement of the pads has caused the punches 30 to pierce the double layer of foil, displacing the punched areas downwardly, as may be seen in Figs. 8, l1 and 12, the double layer of displaced foil being designated 105. Next, movement of movable plate 34 moves the die set into the position shown in Fig. 9, which results in the release of punch plate 71 by latches 73 under the urging of earns on posts 51. Only a slight rise of the movable plate 34 causes post 51 to rise above the position of Fig. 8 and drive the slide away from the punch-supporting plate 71, thus permitting that plate to spring up to the position shown in Fig. 9 under the urging of springs 66. In moving from the position of Fig. 8 to the position shown in Fig. 9, the punches 30 are withdrawn from the punched metal sheets. Thereafter, the cam shoulder 83 on one of the posts 51 drives the anvil slide 38 inwardly against the pressure of its spring 84 so that the portions ofthe anvil are caused to overlie displaced parts of the metal sheet as shown in Fig. 10. At the same time, the continuing upward movement of plate 34 drives the hammer members 39 against the displaced metal 105 forcing it against the sheet which is backed by anvil 38, thereby crimping the displaced metal against the sheet material. During this operation, the punches remain held safely beyond reach of the anvil.

In releasing composite crimped sheet product, the movable plate 34 of the die set moves in the opposite di rection Thus, the post 51 moves downwardly relative to the fixed plate 33 and the pads and the anvil member 38 is spring urged back into the position seen in Fig. 8 as the stops 58 move away from the bottom pad. The steady downward movement of movable plate 34 causes a reverse in the sequence of positions of Figs. 4 and 7-10 of the fixed and movable plates and the pads. However, the punch plate 71 does not move in the reverse sequence, but it follows a modified course. As the cam members 80 drop below the level of their latches, the spring members 78 tends to drive the latches toward the punch-supporting plate 71. However, with the punch-supporting plate too high to be latched, the latches cannot move. Meantime, downward movement of the column 51 causes an overlying portion 82 of the column to pull the punch-supporting plate downwardly in opposition to pressure of springs 66. Plate 71 is drawn downwardly until its position relative to plate 33 as shown in Fig. 4 is assumed, at which time the latch 73 is able to move again over the punch plate 71 under the urging of spring 78. In moving downwardly, the latch 73 does not interfere with the plate, however, because its leading edge is beveled to provide a cam surface which is easily urged out of the way by the downwardly moving plate 71.

The product resulting from the above sequence of operation may be seen in Fig. 14 in which the wider tape 41 and the narrower tab ribbon are joined by a plurality f crimped-areas. -The underside of one of the crimped portions is shown in Fig. 15. It will, of course, be appreciated that modified punch shapes can be used. The punch 30 is capable of producing a crimp joint of the type shown in Fig. 15, whereas a punch of a star configuration might produce a crimp of the general shape shown in Fig. 17 wherein sheets 40 and 41' are joined together by a crimp employing four separate displaced portions 105.

It will be noted that the product shown in Fig. 14 has been torn along perforated edges. The perforations may be made by the die set or may be made independently of the die set. A modified form of the die set is shown in Figs. 20 and 21 to illustrate how perforation could be accomplished in the die set described heretofore. Referring to these drawings, wherein parts corresponding to parts previously described are designated by the same numbers primed, it will be observed that in the upper pad member 31 there is a notch parallel to the row of punches 30' in which is placed a serrated knife 110. This serrated knife is opposed in the lower pressure pad 32' by resilient material 111 filling a groove in the pad. Also provided in the upper pad 31 is a groove engaging a vertically slidable bar 112 which is received in a groove, in the bottom of which lies a spring113 urging bar 112 downwardly. A pin 11 4 or pins prevent the loss of the EQZKBQB bar from the groove and at the same time permit vertical movement because of the vertical elongation of pin receiving slots in the bar. Thus, as the pads come-together, the bar 112 is moved upward in opposition to spring 113 while the serrated edge of knife 110 cuts through the sheet material opposed by resilient member 111. Thereafter, as the pads are moved apart, the bar 112 is urged downwardly by spring 113 thereby stripping the sheet material from the perforating knife edge.

It will be obvious to those skilled in the art that modifications of the present invention as described may be readily made without destroying the essential operation of the device of the present invention. All such changes within the scope of the claims are within the scope and spirit of the present invention.

I claim:

1. A die set for fastening together metallic sheets or the like comprising a pair of pads adapted to receive sheets of material and movable to a position to hold those sheets between them in position for fastening, means for moving the pads together and apart, a punch adapted to displace rather than to remove sheet material positioned to move through openings in one of the pads and to perforate the sheet of material, means movably supporting the punch relative to the pads, an anvil associated with one of the pressure pads and movable relative thereto at least partially, to close the opening in one of the pads of the sheet engaging surface, and a peening hammer movable relative to one of the pressure pads and adapted to pass through an opening in that pad to a position in pressure opposition to the anvil to peen together the sheets of material to form a solid secure bond.

2. The die set of claim 1 in which the anvil is associated with the pad on the side of the punch support and the peening hammer is associated with the opposite pad.

3. The structure of claim 1 in which a perforator is provided in connection with the die set to perforate, the sheet for ready severance at the same time that the die set is actuated.

4. The die set of claim contained in one pad of the with respect thereto.

5. The die set of claim 4 in which the anvil slide is actuated by a cam which is fixed relative to the peening hammer.

6. A die set for fastening together metallic sheets or the like, comprising a fixed plate, a movable plate movable toward the fixed plate, a pair of pressure pads between the plates, means supporting each pad for limited movement toward and away from its adjacent plate and means resiliently urging the pads together away from their adjacent plates so that relative movement of the fixed and movable plates toward each other will move the pads together to engage and hold sheetmaterial placed between them, a punch supported relative .to one of the plates essentially perpendicular to the sheet engaging surfaces of the pressure pads, positioned to pass through openings in the pressure pads, and adapted to perforate the sheet and displace rather than remove sheet material, means moving the punch relative to the supporting plate to withdraw the punch after piercing is accomplished, a limiting stop on one of the plates preventing its adacent pad from assuming a position any closerto said plate, an anvil laterally movable relative to the pressure pad and supported by that pad relative to whose associated plate motion is stopped, means cooperating'with the plate which remains movable relative to the pads for actuating the anvil into position, and a peening hammer on the plate left free to move relative to the pressure pad and movable through an opening in pressure opposition to the anvil to peen together the sheets of material to form a solid secure bond.

7. The structure of claim 6 in which the punch is supported relative to the fixed plate by a support which is held in place relative to the fixed plate byalatch-nntil 1 in which the anvil is a slide die set and movable laterally the piercing by the punch is completed, said latch being coupled to the movable plate and being movable to re-. lease the punch supporting plate after punching is com! plete whereby the punch means is adapted to be with: dil'awn by movement of its support relative to the fixed p ate.

8. The structure of claim 7 in which means is provided to restrainthe pressure pad from further movement toward the fixed plate when it is a predetermined distance from the fixed plate after piercing is accomplished by the punches, after which restraint the punch supporting memher is released by the latch, the means holding the pressure pad relative to the fixed plate thereafter permitting only the movable plate to move relative to the pressure pa 9. The die set of claim 8 in which the latch release for the punch is associated with the movable plate and is fixed relative thereto and the cam driving the anvil is associated with the movable plate and fixed relative thereto, the release of the punches and the movement of the anvil being accomplished in sequence in that order.

10. A die set for fastening together metallic sheets or the like comprising a fixed plate, a movable plate movable toward the fixed plate, a cam supporting post on the movable plate adapted to pass the fixed plate, a pair of pressure pads between the plates, each pad being resiliently coupled to its adjacent plate so that it is urged away from that plate and toward the other pad and other plate, limiting means between the plates and their adjacent pads limiting movement of the pads away from the plates so that at the maximum spacing of the plates the pads are apart but relative movement of the fixed and movable plate toward each other will move the pads together to engage and hold sheet material between them, a punch supported relative to the fixed plate on the side remote from the pads and urged away from the fixed plate by spring means, limiting means between the fixed plate and the punch support limiting their maximum spacing, a punch supported by the punch support essentially perpendicular to the sheet engaging surfaces of the pressure pad positioned to pass through openings in the fixed plate and the pressure pads and adapted to perforate sheet held between the pads and displace rather than remove material therefrom, a slidable latch on the fixed plate adapted to overlie the punch support and hold it relative to the fixed plate during punching, biasing means urging the latch into said overlying position, said latch cooperating with the cam post on the movable plate in a position of the-pads after punching has occurred to move the latch against its bias and release the punch support in order to withdraw the punch, a stop on the fixed plate limiting the approach of the pads to the fixed plate, an anvil mounted on the pad adjacent the fixed plate for movement relative to that pad, said anvil having biasing means urging it out of peening position and having means cooperating with cam means supported on the movable plate for laterally sliding the anvil into peening position after piercing has occurred and the punch has been withdrawn, and a peening hammer member supported on the movable plate and movable toward and into pressure opposition with the anvil through an opening in the pad so that it is adapted to peen together the sheets of material to form a solid secure bond.

11. The die set of claim 10 in which a perforator is provided in the one of the pads opposed to a surface accepting the perforator in the other pad and adapted to perforate'the sheet material so that lengths of it may be readily severed from one another.

12. The die set of claim 10 in which a plurality of punches are employed and in which there is a hammer surface opposed to each of the punches and an anvil surface which is part of a single slide which is opposed to each of the hammers.

15. The die set of claim 12 inwhich at 'leastt-Wo cam posts are provided on the movable plate which posts pass slidably through the fixed plate and each of which posts is provided with cam surfaces to actuate each of a pair of latches adapted to hold a plate punch support in position for punching, and one of said posts also providing a cam surface for actuation of the anvil slide.

14. The die set of claim 10 in which the die set is provided with a feed transverse to the feed of the feed of the main strip or Web whereby narrow strip may be fed laterally across wider strip and in which the punches are aligned to secure the ribbon to the strip and knife means actuatable by the movable plate of the die set for severing lengths of narrow strip.

15. The die set of claim 14 in which the cut-off means is a knife element which is' spring supported on the fixed plate and extends below the path of the ribbon so that the movable plate will move into it and actuate it upwardly against a fixed knife edge held relative to the fixed plate in opposition to the spring in order to sever the ribbon.

References Cited in the file of this patent UNITED STATES PATENTS 1,919,999 Borton July 25, 1933 2,430,377 Vorreyer Nov. 4, 1947 2,586,479 Pettorossi Feb. 19, 1952 V

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