US2358026A - Spot forming means for crown cap spotting machines - Google Patents

Description

p v P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR CROWN CAP SPOTTING MACHINES Original Filed 001;. 28, 1938 8 Sheets-Sheet l 5 1 621. 111 E 95 '3 1* J22 127 I 56 125 I 16' G @M 8% BY GBXZMM Sept- 1944' P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR CROWN CAP SPOT'I'ING MACHINES Original Filed Oct. 28, 1938 8 Sheets-Sheet 2 4 GM/ 4% M BY M Gr /y ATTORNEYS p P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR CROWN GAP SPOTTING MACHINES Original Filed Oct. 28, 1938 8 Sheets-Sheet 3 Fig.5.

Fig.9.

INVEN TOR ATTORNEYS Sept. 12, 1944.

P. E. PEARSON SPOT FORMING MEANS FOR CROWN CAP SPOTTING MACHINES Original Filed Oct. 28, 1938 8 Sheets-Sheet 4 Sept. 1944- P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR CROWN CAP SPOTTING MACHINES Original Filed Oct. 28, 1938 8 Sheets-Sheet 5 ATTORNEYS as /Q p 1944- P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR CROWN CA? SPOTTING MACHINES Original Filed Oct. 28, 1958 8 Sheets-Sheet 6 Fwd. 60

INVENTOR ATTOR NEYS p 1944' P. E. PEARSON SPOT FORMING MEANS FOR CROWN CAP SPOTTING MACHINES Original Filed Oct. 28, 1938 8 Sheets-Sheet 7 Mi 'WQW; 4 4% ATTORNEYS p 1944- P. E. PEARSON 2,358,026

SPOT FORMING MEANS FOR GROWN CAP SPOTTING MACHINES Original Filed 001;. 28, 1938 8 Sheets-Sheet 8 INVENTOR A T ORNEFS Patented Sept. 12, 1944 SPOT FORIWING MEANS FOR GROWN CAP SPOTTING MACHINES Paul E. Pearson, Chicago, Ill., assignor to Continental Can Company, Inc., New York, N. Y

a corporation of New York Original application October 28, 1938, Serial No.

Divided and this application November 30; 1942, Serial No. 467,398

17 Claims.

The invention relates generally to apparatus for forming and aillxing center spots to container closure caps of the crown type, each such cap including a metallic cup having a skirt adapted to fit over and grip the pouring neck of a can, bottle, or other container and a sealing pad of cord or other suitable yieldable material for engaging said neck and effectively sealing the contents of the container, and said invention primarily seeks to provide novel means for punchforming the spots. This application is a division of my copending application for U. S. Letters Patent 237,534, filed October 28, 1938.

An object of the invention is to provide in a crown cap spotting machine a spot forming or punching unit for punching spots and applying them to the carrier elements of the machine, and means enabling separation of the unit and the carrier elements to render each readily accessible for inspection, repairs or the like, without disturbing the timed relation of the respective operating connections.

Another object of the invention is to provide a novel construction and arrangement of spot forming punch equipments including stripping means for stripping spots from the punches and applying them to the carrier elements, and means for assuring proper centering of the spots on said carrier elements.

Another object of the invention is to provide a spot material web supporting means movable with the punching unit in its movement of separation with relation to the rotor head.

Another object of the invention is to provide novel means for supporting, feeding and tensioning the web of spot material.

Another object of the invention is to provide novel means for disposing the spot material web angularly with respect to the punch unit and for adjusting the length of the step feed movements imparted thereto so as to minimize waste.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more fully understood by following the detailed description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure l is a front elevation of a center spot forming and applying machine embodying the invention.

Figure 2 is a left end elevation, parts of the framing being broken away.

Figure 3 is a fragmentary rear elevation, parts being broken away and in section at the plane of the cam shaft.

Figure 4 is a fragmentary vertical section taken through the punch unit housing and base head across the position of the punch slide.

Figure 5 is a detail plan view of the punch slide and the associated plunger actuating bracket.

Figure 6 is a, vertical longitudinal section taken on the line 6-6 on Figure 5.

Figure 7 is an enlarged fragmentary sectional view illustrating one of the spot forming punches as moving to the spot forming or punching position.

Figure 8 is a view similar to Figure 7 and illustrates a position of parts in which the spot has been formed and the punch unit is starting its return movement.

Figure 9 is a detail view illustrating the punch equipment limiting stop means.

Figure 10 is a detail view illustrating the foil web tightener equipment.

Figure 11 is a fragmentary end view of the foil web tightener.

Figure 12 is a detail sectional view illustrating the foil web take-up spool.

Figure 13 is a detail sectional view illustrating the foil feeding roller mounting.

Figure 14 is a fragmentary sectional view illustrating the driving means for the ratchet and pawl foil web feed.

Figure 15 is a fragmentary side elevation of the ratchet and pawl equipment.

The crown cap spotting machine in which the spot forming equipment comprising the present invention is herein shown as embodied, and which is disclosed in my copending parent application for U. S. Letters Patent, Serial No. 237,534, of which this application is a division, includes a machine framing A, spot forming mechanism 13, a spot carrier rotor C which receives spots from the forming mechanism and carries them through a heating station to the station at which they are applied to the crown caps, heating means D at the heating station for directly heating the heat fusible adhesive on the spots to render it tacky, crown cap feeding means E for presenting successive rows of caps at the spot applying station for having the carrier elements move thereinto and present the spots in centered relation therein, and stripping mansF to strip the spotted caps from the carrier elements and cause them to fall on the take-oi! conveyor G, which conveys them away from the machine. See Figure 1.

The frame structure A includes a main bed I and supporting legs 6. A motor I is supported pulley and belt connections 9.

on the bed and drives a driver shaft 8 through The shaft 3 is rotatably supported in horizontal relation in themachine framing in the manner best illustrated in Figure 3 and it imparts rotation to the main cam shaft Ill-through worm gear drive connections See Figure-3.

The shaft I is equipped with an indexing cam l2 which engages equidistantly spaced rollers l3 projecting from an indexing disc I4, secured to the horizontally rotatable shaft I5 on which the projecting radially therefrom at the spot form-- ing station, the spot heating station, the spot applying station at which the spots are aillxed to the crown caps, and the spotted cap discharging station at which the spotted caps are discharged from the machine.

It will be observed by reference to Figures 3 and 4 of the drawings that the cam shaft I0 includes a spline end extension I3 which extends into the housing l9 forming part of the spot forming mechanism B.

The housing I9 is slidably supported as at 24 on the frame bed 5 and has a pair of racks 25 secured in parallel spaced relation to the under surface thereof. The racks are engaged by gears 26 secured upon a shaftfl rotatably supported as at 28 in the frame bed 5 and extended toward the rear beyond said frame bed. The extended end of the shaft is equipped with a.- hand lever 29, and by manipulation of this lever the gears 26 may be caused to shift the housing I! and all parts carried thereby toward or from the rotor l5 for a purpose later to be described. See Figure 4.

The upper surface of the frame bed 5 is provided with a longitudinal recess 30, and a dovetail keeper rail 3| is secured at one side of the recess. A dovetail guide rail 32 is secured to depend from the housing I 9 and slidably fits the recess to the side of and partially beneath the rail 3|. See Figure 4.' It will be observed by reference to Figure 9 that the end of the keeper rail 3| toward the rotor head is equipped with a bracket 33 which overlies the end of the guide rail 32 and carries an adjustable stop screw 34 for engaging the rail 32 and limiting movement of the housing I! toward the rotor 15.

The upper face of the frame bed 5 also includes a longitudinally extended T-groove 35, and a T-head 35 is slidable in said groove. A clamp screw 31 is threaded into the member 35 and passes upwardly through the housing I! where it is equipped with a hand lever 33. A clamp screw 39 is threaded upwardly into the guide rail 32 through a longitudinal slot 43 formed in the frame bed 5, and this screw also has a hand lever 4| affixed to its lower end. By tightening the screws 31 and 39 by manipulation of the handles "and 4|. the elements 35 and 32 can be clamped a ainst the frame bed 5 to secure the housing is in fixed position. By loosening the screws 31 and 33 and manipulating the lever 29 in the manner hereinbefore described, the housing can be moved on the frame bed 5. See Figure 4.

The housing It includes a pair of spaced parallel recesses 42 in each of which is removably secured a grooved guide rail 43. A slide member 44 is vslidable in the grooveway thus formed, laterally with respect to the axis of the rotor IS. The slide includes apair of spaced depending bearing ears 45- for receiving a drive pin 46 projecting trunnion fashion from the free end of a pitman 41, the other end of the pitman being equipped with a strap 43 which encircles an eccentric 49 secured upon a shaft 50. The shaft 50 has rotary hearin as at 5| in the housing i9 and carries a miter gear 52 through which rotation is imparted to the shaft. from the miter gear 22 secured upon the spline shaft I0, I85 See-Figures 3 and 4.

The slide 44 is recessed at 53 to permit freedom of movement of the pitman 41 and is provided with a pair of upstanding bearing bars 54, 55. These bars are disposed in spaced relation,

parallel one with the other and with the axis' of the rotor Hi, the bar 54 being disposed nearest said rotor. Y

At each end each bar 54 and 55 has a bearing bore 56. The bores 56 are aligned in pairs and each pair slidably receives a rod 51. The rods extend through their bearings in the bars 54 and 55 and are fixed to and carry a punch block 58 having-five equidistantly spaced punch facing bores 59 formed therein,- and a die plate 50 removably secured to said block'in any approved manner. The plate 50 and the block 58 are in face contact except for a grooveway 5| formed between them and traversing all of the bores 59 at an. angle of approximately 40. The die plate 60 is equipped with die bores 52 aligned with the block bores 59 and which merge at the opposed face of the plate with clearance recesses 63'of .a diameter for receivin the outer ends of the carrierelements H of the spot carrier rotor It. The exposed face of the plate 50 may also be equipped with upwardly extended clearance recesses 64 for assuring against obstruction of the carrier units during indexing of the rotor l6 followin i the forming of the spots and the attachment thereof to the carrier elements ll. See Figures 7 and 8.

At their other ends the rods 51 pass freely through ears 55 in a bracket member 55 stationarily secured as at 51 upon the housing l9. These ends of the rods are threadedand carry spaced abutment and jam nut equipments 68 so placed with relation to the ears "as to provide lost motion clearances between the ears and said equipments as indicated at 83. See Figures 1, 5 and 6.

The bar 55 includes upstanding bearing ears ll! in which a cross shaft H is rockably mounted.

A rocker member is mounted on the shaft II andincludes a centraL-upwardly projected lug I2 and a depending full width plunger actuating edge portion I3 disposed below the axisof the shaft II See Figures 5 and 6. The bracket 55 includes an overhanging arm portion 14 "on which is mounted an adjustable stop screw 15 which opposes and is engaged by the rocker member lug 12 each time the slide-44 approaches the rotor It. It will be obvious that upon each such contact of the rocker member lug 12 with the stationary screw 15 the lower edge or plunger actuating portion 13 of the rocker member will be forced toward the right as viewed in Figure 6 of the drawings.

thereof directed toward the rotor I8 to provide a punch sleeve e eiving end'portion terminating in an abutmen shoulder 19 Each member 11 also includes upwardly and downwardly projected apertured ears 88 which are secured by screws 8| to the bar 54.

A punch sleeve 82 is mounted on the reduced end of each of the supporting members 11 in engagement with the abutment shoulder 19 thereof, and each punch sleeve includes a flared end seat 83 for a reciprocable stripper head 84 carried on a plunger 85 slidable in' the respective center bore 18. If desired, each supporting member 11 and the associated plunger 85 may be provided with a pin and slot equipment 85 for preventing displacement of the plunger about its axis.

Within the respective bore 18, each plunger 85 carries an abutment head 81 secured upon the threaded end of the plunger by jam nut equipments through which the extreme end of the plunger passes to form a tappet 88. A spring-89 surrounds each plunger 85 in the respective bore 16, being interposed between the abutment head 81 and the supporting member 11 so as to constantly urge the stripper head 84 against its seat. See Figures 5 to 8.

A plunger 98 is slidably mounted in each bore 16 in the bar 55. The plungers 98 extend from the receiving bores at one end for constantly engaging the plunger actuating element portion 13, and at their other ends each plunger carries an enlarged abutment head 9| which normally engages the bar 55 in the manner illustrated in Figures 5 and 6' of the drawings. Each abutment head has a threaded bore and adjustably receives a tappet screw 92 for engaging the respective tappet 88. See Figures 1, 5 and 6.

A foil web 93 passes through the angularly disposed slot BI from a supply reel 94 to a scrap take-up'roll 95. The reel 94 is supported on a bracket 96 secured to the housing I9, and in passing from this reel toward the slotway 8|, the web passes over an idler pulley 91 mounted in a bracket 98 secured to the housing I9, and over a tightener pulley 99 disposed between the idler 91 and the reel in a stirrup I88 pivotally supported in the bracket 98 and constantly urged against the web by a coil spring I8I.

The housing I9 includes a removably mounted head plate I82 having abearing hub I83 projecting upwardly at an angle therefrom and aligned with a bearing hub I84 supported on a bearing web I85 extending upwardly from the head plate. The web includes a bearing hub I86 for a stub shaft I81 on which the scrap take-up reel 951s mounted. See Figures 2 and 12.

The scrap take-up reel structure includes a reel hub portion I88 having rotary hearing as at I89 on the shaft I81. The shaft carries an adjustable abutment head II8 opposed to a fric- ,ion head III splined on the shaft I81, a spring II2 being interposed between the heads H8 and III for urging the latter into frictional engagement with the reel hub portion I88. See Figure 12. A large gear H3 is secured upon the lower end of the shaft I81.

The web I85 also includes a U-shaped bracket portion I I4 in the arms of which a foil feed roller H5 is rotatably mounted, as at H6. The roller H5 is opposed by a presser roller II1 mounted in the arms of a U-shaped carrier -I I8 constantly urged toward the roller I I5 by a spring I I9. The feed roller shaft I28 is extended at one end to receive a finger knob I2l so as to enable manual manipulation of the roller, and at its other end the shaft carries a ratchet wheel I22. An arm I23 is rockably supported on the shaft and carries a driver pawl I24. Adjustment of the stroke of oscillation of the arm I23 and the feed step of movement imparted to the web 93 can be varied by altering the position of the eccentrically mounted crank pin I25 so as to vary the effective length of the arm I23. See Figures 13 and 14. Each time the wheel I22 is moved by forward movement of the driver pawl I24 and arm I23 a step feed movement is imparted to the foil web Figures 2, and 13 through 15.

Operation The rotor I6 is indexed, station by station, about its axis for presenting the carrier e ements I1 projecting therefrom at the various stations, at one of which spots are formed and attached to the presented elements, the attaching to or retaining of the spots on the carrier elements in this instance being efiected by suction acting through the duct I1, at another station of which the adhesive on the exposed faces of the carried spots is heated and rendered tacky, at another station of which the carrier units and the spots will engage a battery of crown caps for affixing the spots thereto.

As each battery of carrier elements I1 is presented at the spot forming station as shown in Figure 1, the punch slide 44 moves forwardly toward the battery of carrier elements. As a particular battery of carrier elements I1 is brought into registry with the punches, the die plate 68 is spaced away from said units. By initiation of movement of the slide 44 toward said units, the rods 51 will be caused tomove with the bars 54, 55 to the extent permitted by the lost motion spacing 69, as shown in Figure 5 so as to engage the die plate with the units and permit the extreme ends of the carrier elements I1 to perfectly register with the punch units and the spots to be formed with said units. Upon continued movement of the slide the punch sleeves 82 will be moved from the positionillustrated in Figure '7 to the position illustrated in Figure 8 for cutting spots from the foil web 93. Just before completion of the advance movement of the slide 44 the lug 12 engages the screw 15 causing the plunger actuating portion 13 to force and apply them to the ends of the carrier elements II in the manner illustrated in Figure 8, the spots being retained on the carrier elements by suction as aforesaid.

As the slide 44 starts its return movement, frictional engagement of the bar bores 58 with the rods 51 will move the rods to the extent permitted by the lost motion spacing 69 previously referred to which is sufllcient to remove the die plate 60 from contact with the carrier units as illustrated in Figure '7. Continued return movement of the slide 44 will return the plunger equipments to their normal positions. The next indexing movement of the rotor l6 takes place after the die plate 60 has been moved away as described.

After each operation of the punches as above described, the ratchet and pawl equipments will function to impart a step movement to the foil web 93, and because of the peculiar angular position of this web successive angularly disposed lines of apertures formed by removal of the spots from the web will be staggered as illustrated in Figure 2 of the drawings so as to reduce to a minimum foil waste. The step-by-step feed movements of the foil are imparted by the roller H5. The take-up reel 95 is rotated slowly and continuously, and the movement of this reel is timed to take-up the scrap without pulling on the scrap web in a manner likely to break it. Avoidance of breakage is further assuredby reason of the provision of the friction head I I I.

As has been previously stated the housing l9 and the whole punch, die, and foil mounting equipment are bodily movable toward and from proximity with the rotor l6. Thus whenever it is desirable to work upon the punch unit or the carrier rotor IE or its elements H, the bodily movable unit may be moved away to render the parts readily accessible without disturbing the drive connections of the various parts or their timed relation.

It is of course to be understood that the details of structure and arrangement of parts may be variously changed and modified without departing from the spirit and scope of my invention.

I claim: 7

1. In a machine of the character described, a spot forming punch mechanism, a rotor having spot carrier elements projected therefrom and. movable for translating formed spots from th punch mechanism to a place of application, means for driving the punch mechanism and the rotor in timed relation, and means mounting the punch mechanism and the rotor for relative separation without disturbing said timed relation drive.

2. In a machine of the character described, a spot forming punch mechanism, a rotor having spot carrier elements projected therefrom and movable for translating formed spots from the punch mechanism to a place of application, means for driving the punch mechanism and the rotor in timed relation, and means for moving the punch mechanism away from the rotor to render each more readily accessible for inspection or manipulation purposes without disturbing said timed relation drive.

3. In a machine of the character described,a spot forming punch mechanism, a rotor having spot carrier-elements projected therefrom and movable for translating formed spots fromthe punch mechanism to a place of application, means for driving the punch mechanism and the rotor in timed relation, means for moving the punch mechanism away from the rotor to render each more readily accessible for inspection or manipulation purposes without disturbing said timed relation drive, and spot material web positioning means movable with the punch mechanism during said movement away from said rotor.

4. In a machine of the character described, a frame 'bed, a rotor rotatably supported on the frame bed and having spot carrier elements proiecting therefrom, a housing slidable on said frame bed toward and from said rotor, spot forming punch mechanism reciprocably mounted on said housing and normally disposed for forming spots and presenting them to said carrier elements, means for driving the rotor and the punch mechanism in timed relation, and means for moving the housing to effect a separation of the rotor and the punch mechanism without disturbing the driving connections thereof.

5. In a machine of the character described, a frame bed, a rotor rotatably supported on the frame bed and having spot carrier elements projecting therefrom, a housing slidable on said frame bed toward and from said rotor, spot forming punch mechanism reciprocably mounted on said housing and normally disposed for forming spots and presenting them to said carrier elements, means for driving the rotor and the punch mechanism in timed relation, means for moving the housing to effect a separation of the rotor and the punch mechanism without disturbing the driving connections thereof, means for limiting movement of the housing toward the rotor, and means for locking the housing on the frame bed.

6. In a machine of the character described, a frame bed, a rotor rotatably supported on the frame bed and having spot carrier elements projecting therefrom, a housing slidable on said frame bed toward and from said rotor, spot forming punch mechanism reciprocably mounted on said housing and normally disposed for forming spots and presenting them to said carrier elements, means for driving the rotor and the punch mechanism in timed relation, means for moving the housing to effect a separation of the rotor and the punch mechanism without disturbing the driving connections thereof, and spot material web supporting and positioning means mounted on and movable with said housing.

7. In a machine of the character described, a rotor havingspot carrier elements projecting therefrom, a spot forming station, means for indexing the rotor to present carrier elements serially at said station, spot material supporting means, punches at said station movable through the material to form spots, means movable with and independently of the punches for presenting formed spots tosaid carrier element,

and means for retaining spots on said elements.

8. In a machine of the character described, a rotor having spot carrier elements projecting therefrom, a spot forming station, means for indexing the rotor to present carrier elements serially at said station, spot material supporting means, punches at said station movable through the material to form spots, stripper plungers centered in the punches and movable beyond the punches for stripping formed spots from the punches and presenting them to carrier elements at said station, and means for retaining spots on said elements.

9. In a machine of the character described, a rotor having spot carrier elements projecting therefrom, a spot forming station, means for indexing the rotor to present carrier elements serially at said station, spot material supporting means, punch means at said station movable through the material to form spots, means movable with and independently of the punch means for presenting formed spots to said carrier elements, and means for retaining spots on said elements, said punch means and said carrier elements having lnterengaging circular portions effective to assure perfect centering of the spots on said elements.

10. In a machine of the character described, punch mechanism comprising a slide guideway, a slide reciprocable in said guideway, punch members carried by said slide, rods slide guided on the slide and projected forwardly therefrom, a die plate carried on the projected ends of the rods and having apertures therein for receiving said punch members, a stationarily supported bracket member, and means carried by the rods and engageable with the bracket to limit movement of the rods in each direction whereby said die plate will be moved a limited distance with the slide upon initiation of movement thereof in each direction and whereby the punch members will be alternately projected into and withdrawn from said apertures.

11. In a machine of the character described, punch mechanism comprising a slide guideway, a slide reciprocable in said guideway, punch members carried by said slide, rods slide guided on the slide and projected forwardly therefrom, a die plate carried on the projected ends of the rods and having apertures therein for receiving said punch members, a stationarily supported bracket member, means carried by the rods and engageable with the bracket to limit movement of the rods in each direction whereby said die plate will be moved a limited distance with the slide upon initiation of movement thereof in each direction and whereby the punch members will be alternately projected into and withdrawn from said apertures, spot stripper plungers centered in and movable through the punch members, and means engageable with the bracket near the completion of each forward movement of the slide for projecting the stripper plungers from the punch members.

12. In a machine of the character described, punch mechanism comprising a slide guideway, a slide reciprocable in said guideway, punch members carried by said slide, an apertured die plate positioned so that the punch members can engage in the apertures thereof, a rotor having spot carrier elements projecting therefrom, means for indexing the rotor to present carrier elements serially before the punch mechanism, a stationarily mounted bracket, spot stripper plungers centered in and movable through said punch members, means engageable with the bracket near the completion of each forward movement of the slide for projecting the stripper plungers to strip formed spots from the die plate and present them to said carrier elements, and means for retaining spots on said carrier elements.

13. In a machine of the character described, punch mechanism comprising a slide guideway, a slide reciprocable in said guideway, punch members carried by said slides, an apertured die plate positioned so that the punch members can engage in the apertures thereof, a rotor having spot carrier elements projecting therefrom, means for indexing the rotor to present carrier elements serially before the punch mechanism, a stationarily mounted bracket, spot stripper plungers centered in and movable throughsaid punch members, means engageable with the bracket near the completion of each forward movement of the slide for projecting the stripper plungers to strip formed spots from the die plate and present them to said carrier elements, said carrier elements and said die plate having interengaging circular portions effective to assure perfect centering of the spots on said carrier elements, and means for retaining spots on said carrier elements.

14. In a machine of the character described, punch mechanism comprising a slide guideway, a slide reciprocable in said guideway, punch memcarried by said slide, rods slide guided on the slide and projected forwardly therefrom, a die plate carried on the projected ends of the rods and having apertures therein for receiving said punch members, a stationarily supported bracket member, means carried by the rods and engageable with the bracket to limit movement of the rods in each direction whereby said die plate will be moved a limited distance with the slide upon initiation of movement thereof in each direction and whereby the punch members will be alternately projected into and withdrawn from said apertures, a rotor having spot carrier elements projecting therefrom, means for indexing the rotor to present carrier elements serially before the punch mechanism, spot stripper plungers centered in and movable through said punch members, means engageable with the bracket near the completion of each forward movement of the slide for projecting the stripper plungers to strip formed spots from the die plate and present them to said carrier elements, said carrier elements and said die plate having interengaging circular portions effective to assure perfect centering of the spots on said carrier elements, and means for retaining spots on said carrier elements.

15. In a machine of the character described, spot forming mechanism comprising a die plate having a battery of punch receiving apertures therein arranged in a line, means for supporting a wide web of spot material before the die plate apertures, a battery of punche reciprocable through said aperatures, means to feed the web step-by-step so as to diagonally dispose and stagger the punch holes in said web thereby to minimize wastage of material, a web supply reel,

a scrap take up reel, and means for rotating the take up reel continuously, said step-by-step feeding means being disposed between the take up reel and the punches.

16. In a machine of the character described, spot forming mechanism comprising a die plate having a battery of punch receiving apertures therein arranged in a line, means for supporting a wide web of spot material before the die plate apertures, a battery of punches reciprocable through said apertures, means to feed the web step-by-step so as to diagonally dispose and stagger the punch holes in said web thereby to minimize wastage of material, a web supply reel, a scrap take up reel, and means for rotating the take up reel continuously, said step-by-step feeding means being disposed between the take up reel and the punches and said take up reel drive including friction slip connections.

17. In a machine of the character described, spot forming mechanism comprising a die plate having a .battery of punch receiving apertures therein arranged in a line, means for supporting a wide web of spot material before the die plate apermres, a better! of punches reciprocable I means bein: disposed between the take up reel through said apex-hires, means to feed the web and the punches, means for yieldably tensioning step-by-step so as to diasonally dispose and the web. and means includins an sdiustebly stscser the punch holes in said web thereby to mounted eccentric crank pin for ediustins the minimise wastlse of material, a web supply, reel, 5 length or the web feed steps.

a scrap take up reel. means for rotating the take 7 PAUL E. PEARSON. up reel continuously, said step-by-step feeding

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