US2281554A - Curling machine - Google Patents

Description

y 5, 1942- A. CALLESON ETAL 2,281,554 ,CURLING MACHINE I Filed Sept '9, 1939 9 Sheets-Sheet l INVENTORS. A/ws 644L550 &

BY 506/11? A. CALLEJON ATTORNEY-S A. CALLESON El AL CURLING MACHINE Filed Sept. 9', 1939- 9 Sheets-Sheet 2 INVENTORS. 4/105 Omssozv & 05m? A. CHLLESON AT ORNEYS.

May 5, 194 2.

y A. CALLESON ETAL 2,281,554

GURLING MACHINE Filed Sept. 9, 1939 9 Sheets-Sheet 3 INVENTORS. mm; 09115011! & BY 506/? A. CALLESOA/P Ila/4w.

ATTORNEYS.

y 5, 1942- A. CALLESON EIAL 2,281,554

CURLING MACHINE Filed Sept. 9, 1939 9 Sheets-Sheet 4 IN VEN TORS. AMos CALLESO/V &

- EDGAR A. CALLESON BY- m "54 ATT RNEYS.

y 1942- A. CALLESON ETAL 2,281,554

CURLING MACHINE Filed Sept. 9, 1939 9 Sheets-Sheet s l I 1 l I l 87 V l V 3 I g) INVENTORS. Am; CAlLESO/V a;

0 am A. 6/114 550M ATTORNEYS.

May 5, 1-942.

} A. CALLESON- ETAL CURLING MACHINE Filed se i. 9, 1939 9 Sheets-Shet '7 AMos CAzLEso/v a. EDGAR A. CALLESON BY ORNEYJ.

May 5, 1942. A. CALLESON ETAJL CURLING MACHINE Filed Sept. 9, 1933 9 Sheets-Sheet 8 EDGAR A. CALLEJON May 5, 1942.

A. CALLESON ETAL CURLING MACHINE Filed Sept. 9, 1939 9 Sheets-Sheet 9 in a i n mw m EEL V O M M 0R m AM M -U m Patented T Iii came maemnn Amos (Calleson and Edgar A. Calleson, Merrick,

E, assignors to flrown Cork a Seal ma pany, Erin, Baltimore, Md, a corporation of New York Application September 9,1939, seriaino. 29am a crown closure. Instead of having a plane sur- 23 @liaim's.

This invention relates to a machine for and method of curling metal, and, more particularly, curling the'ends of metallic containers. In the specific embodiment illustrated in the accompanying drawings and described below, the invention is disclosed as embodied in a machine for curling the upper ends of the cylindrical necks of sheet metal containers of novel type adapted for the packaging, of beer and other pressure beverages.

The primary object of the present invention is to provide means and methods for curling the ends of containers, to provide a curl of novel structure adapted to function as a crown finish, to receive closures of the crown type.

It is a further object of the invention to provide a machine for curling the ends of beer cans which is rapid and emcient in operation, and which forms the curl in a plurality of operations in such manner that the metal of the container is not split, torn or otherwise harmed.

It is a further object of the invention to provide improved means for feeding can blanks to the machine and to provide improved curlingand curl-setting instrumentalities operating in conjunction with and in timed relation to the can body blank feeding means.

In order to accomplish the foregoing and other objects, the invention provides means for feeding blanksto a mandrel, means for projecting the mandrel into the'interior of the blank, and means for projecting the mandrel and the blank forwardly, so that the end of the blank is pro- The blanks may each be provided with a slight,

preliminary curl before they are fed into the machine of the present invention, or the machine itself may do the preliminary curling. In any event, after the end of the neck is curled to the form of a circular bead, the blank is retracted.

with the mandrel, the die is shifted, a curl-setting die, which may be a substantially plane or face, the curl-setting die may have a; curved surface of a concave frusto-conical surface, to apply a downwardly sloping face to the end of the neck. After the curl-setting operation just described, the mandrel is automatically withdrawn from the can body and the can is discharged from the machine 'by gravity or otherwise. V

In the form of the invention illustrated in th accompanying drawings, the end of .the can is given a preliminary curlby projecting the same into a die having a curling groove of narrow cross-section, struck. on a relatively short radius. The can is retracted and the die is shifted so as to bring the second curling die into alignment with the end of the can, the latter die having a curling groove of wider cross-section, struck on a longer radius. The mandrel and the can are again projected forwardly and then retracted, as aforesaid, and the curled end is finallyset by engagement with the abutment surface, but it must be understood that the invention is not limited to applying the preliminary curl in the same machine as the machine which performs the final curl and curl-setting operations, since, in some cases, it is found desirable to interpose a cleaning step between-the preliminary curling and the final operations.

In the accompanying drawings:

Figure 1 is a rear elevation of the machine;

Figure 2 is a side elevation partially in section, looking from the right of Figure 1;

Figure 3 is a longitudinal section, with certain parts omitted for the sake of clarity;

Figure 3a is a diagrammatic elevation of a pair of cams and cam following rollers;

Figure 4 is a horizontal section, partially in plan; A

Figure 5 is a plan view, partially in section, on a reduced scale;

Figure 6 is a vertical section and partial elevation of a brake mechanism associated with the invention;

Figure '7 is an elevation of the die slide;

Figure 8 is a vertical section on line 8-8 of Figure '7;

Figure 9 is a fragmentary section of the end of a can blank, shqwing, diagrammatically, the first two curling operations;

Figure 10 is a similar section of the can end;

completed Figure 11 is a side elevation of the can blank feeding means;

Figure 12 is afront elevation of the same, and Y Figures 13-21 are diagrammatic representations of the successive steps performed in the operation'of the machine. 7

The machine comprises a base l having upwardly projecting sides El, E2 terminating at their upper ends in a platform 53. At the rear of the machine, a horizontally disposed, main cam shaft 85, journalled for rotation in bearings 86 ll, has a large spur gear 98 keyed to its end, in mesh with a driving pinion 59 secured to one end of a counter-shaft 2B, the other end of which is pinned to the driven disc 2! of an air clutch rep-: resented generally at 22. Power is transmitted to the shaft 26 from an electric motor or the like 23 through a driving pinion 2 3 in mesh with a gear 25 on the flywheel 26, the latter being keyed to the clutch casing 27, loose on the shaft 28. Interiorly of the casing 27, there is a diaphragm 28, clamped around the periphery of the casing and positioned to urge the driving disc 29 into engagement with the driven plate 2i, when air under pressure is admitted to the casing through a pipe 3d from any suitable source ofair under pressure. When the air pressure is cut off,

springs 3| urge the driving member 29 away from the disc, and transmission of power is automatically interrupted. As hereinafter pointed out, an air controlled friction brake is simultaneously applied, to stop the machine.

Below the main camshaft i5, there is .mounted a stationary shaft 35, upon which a plurality of cam following levers are fulcrumed. As hereinafter pointed out, the lever 36 controls the movements of the body blank supporting mandrels; lever 31 operates the curling die slide, and lever 38 the can body blank feeding mechanism. 011 the upper platform 53, there are secured by appropriate bolts, a pair of ways 39, 40 for a horizontally reciprocable slide 6|, which carries at its forward end a pair of can supporting mandrels d2, 53, each of which is shaped to correspond to the shape of the interior of the can body blanks d4, (Fig. 5). The rear end of the slide M is provided with an opening 46 in which hardened steel bearing plates 41 are secured, to take the wear from the upper end 48 of the driving lever 35, said end being provided with hardened inserts 49 (Fig. 2). The lever 36 is formed with an integral, rearwardly and upwardly projecting web 50 having at its-end a socket 5! in which there is adjustably mounted a block carrying a laterally projecting stub shaft 52 upon which a cam following roller 53 is jouras desired, and by then tightening the lock nut which arm terminates in the end 68 disposed in' lever 38 toward the left, Figure 2, while the cam 57, through the roller 56, swings the lever in the opposite direction. Thus the: slide 4| and the mandrels carried thereby are reciprocated and in accordance with the contours of the cams 54, 51. The main frame of the machine, at its forward end, carries a bracket (Figs. 2 and 5) in which vertically disposed track members GI are secured. A vertically disposed curling die slide 62, provided with grooved side edges slidably mounted on the tracks, is formed with forwardly projecting flanges 83, 63a, at its upper and lower edges, positioned to, abut the .upper and lower surfaces, respectively, of the bracket 60 at its upper and lower limits of movement. At its lower end, the slide has downwardly projecting ears es, in which a transverse pin 65 is mounted (Fig. 7), carrying, at its outer ends, links 66, Gl

secured at their lower ends (Figs. 2 and i) to a lever 68 Journalled loosely on a transverse rock shaft 69. The lever 68 is one arm of a bell crank, comprlsinga sleeve l9 and a downwardly projecting arm ll having a slotl2 formed therein for the reception of a block 13 adjustably secured therein by a screw 76. The block carries a laterally projecting coupling member, adjustably secured to the end of a rod or link 15, connected at its other'end to the upper, inner end s'i'iof the cam following lever 31. Lever 31 is bifurcated to provide arms disposed respectively on opposite sides of the cam shaft l5. One arm carries a roller 36 in engagement with a cam ll, while the other carries a roller E8 in engagement with cam 79. Hence, as the cams rock the lever 36, the movements thereof are transmitted through the link it, bell crank ll, 68 and links 4 es, $7, to reciprocate the die slide 62 vertically.

The die slide 62 carries, at its upper end, a pair of preliminary curling dies ll, 'i'l' (Figs. .7 and 8), each of which is secured upon a threaded pin 78 secured in a sleeve i9, by a lock nut 80;

an aperture the sleeve '79 being in turn bolted in in the slide 62 by a nut 8|. The position of each die, therefore, may be accurately adjusted by screwing the pin '18 intothe sleeve, more or less,

The die 77 has a relatively narrow curling groove 82, adapted to form a relatively'sharply turned, partial bead as indicated in dotted lines at 83 in Figure 9.

At a lower point, the slide 62 carries a pair of second curling ,dies 84, vertically aligned with the dies if, 31' and each secured to a pin 85 adjustably mounted in a sleeve 86 in substantially the same manner as previously described. At an intermediate point, preferably between each pair of preliminary and secondary curling dies Ti, 88, there is positioned an abutment surface er, which, in the embodiment illustrated, comprises a head 88 on the outer end of a threaded shank 89, screwed in the die slide and adjustably secured therein by a lock nut 90. As hereinafter described, in connection with the operation of the machine, the slide is reciprocated vertically during retraction of the can body supporting mandrels, first to place the preliminary curling die l? in alignment with the end of the can, then to place the second curling die 84 in alignment, and finally to bring the abutment surface 81 into alignment. The die serves to curl the neck of the, container from the shape shown at 83 in Figure 9 to that represented by'9l, while the curl is changed to the form shown in Figure 10 by striking the abutment surface 81. I

A preferred form of can feeding mechanism is disclosed in Figures 11 and 12, the driving mechanism therefor being shown in Figures 1, 2 and 4. An upwardly and laterally inclined chute receives can bodies from an appropriate conveyor along which the bodies roll. The chute leads to a partition block 96, where it is divided into two substantially vertical chutes 91, 98, in which the cans arrange themselves in stacks. The sides 99, tllil of the chutes terminate in spaced relation pressed friction pads I00, I09. The plates I- I01, adjacent their lower ends, carry forwardly projecting brackets IIO having stub shafts III joumalled therein. Fixedly secured to each shaft I I I, is a bell crank lever comprising an outwardly projecting arm H2 and a downwardlyand inwardly projecting arm II3, the latter being shaped at its lower end to provide a concave I portion II4 adapted to embrace and closely fit the side wall of a can body. The bell crank also includes upwardly and downwardly projecting stop lugs H5, H6, each adapted to engage plates H1, III! to limit the pivoting movements of the bell cranks in both directions.

The outer ends of the lever arms II2 are connected, through pins IIS and collars I20, to vertically disposed rods I2I, the latter being secured at their lower ends (Fig. 4) to substantially horizontally projecting rock arms I22, I23 fast on the rock shaft 69, carrying a fixed collar I24 having an integral, downwardly projecting. lever arm I25 (Fig. 2). By means of an adjustably mounted block, a laterally projecting pin, and a sleeve the ends II4 of the arms H3 move inwardly to embrace the cans 44a, 45a. As the downward movement continues, those cans are carried downwardly by the arms, past' the spring-pressed retaining fingers IOI, the latter serving to catch and retain the next pair of cans 44b, 451). Meanwhile, of course, the first pair of cans 44, 45, have been curled and discharged from the machine.

Secured to the front face of the partition block 96, between'the two chutes 91, 98, there is secured a downwardly projecting spring plate I3I, having at its lower end, a pair of laterally and forwardly inclined wings I32, each provided with appropriate pads I33, bearing against the conical end surface of the adjacent can body. The spring I3I and the wings carried thereby prevent the cans from inadvertently becoming stuck in the curling dies and serve as positive means for retracting the cans from the dies when the mandrels 42, 43 are retracted by their cam-operating means, topermit shifting of the die slot.

As previously pointed out, friction brake means are provided for stopping the operations of the machine when the air clutch 22 is disengaged. As shown in Figures 1 and. 6, a brake drum I40 is fixed on the drive shaft 20, and a pair of brake shoes I4I, I42 carrying brake linings I43, I44 are secured thereto, the arm I is connected tothe lower end of a rod or link I25, the other end of which is secured to the upper end of the cam following lever 38.

The lever 38 is similar in construction to the lever 31 and carries, on its rearwardly projecting limb (Figs. 1 and 3a), a roller I21 disposed in engagement with the face of a cam I20, fast on the cam shaft I5. The forwardly projecting limb of the lever 38 likewise carries a laterally projecting roller I29 in engagement with the face of a cam I on the shaft I5. Hence, oscillating movements of the lever 38 are transmitted through the link I26, rock shaft 59, rock arms I22, I23, and links I2I, to impart vertical reciprocations to the slides I05, since the latter are connected to the links I2I by the short arms N2 of the bell cranks pivoted on the stub shafts III carried by the brackets IIO secured to the slides I00, I01. As previously pointed out, the vertical reciprocations of the slides I06, I01 are retarded by the friction pads I00, W9. is applied by the vertical'rods I21 when the parts are in the position shown in Figure 12, the bell crank levers are swung about .the axes of the stub shafts III, the arms H2 moving upwardly and the arms H3 outwardly, suchmovement being limited by the abutment of the lugs IIS with the plates i I1. This outward swinging movement of the arms H3 releases the ends IE5 thereof from engagement with the can bodies 46, 45. when the short arms IIZ have reached their limit of upward swinging movement, continued upward movement of the links Iii forces the slide plates I06, I01 upwardly, until at the upper limit of movement of the parts, the ends IE4 of the arms H3 are disposedopposite the next pair ofcans' thereabove, 00a, 40a, but still spaced outwardly therefrom. Since the slides I05, I01 are frictionally restrained against downward movement, the

. first result of lowering the rods I2I' is to swing the bell cranks downwardly and inwardly, so that Therefore, if an upward force disposed in engagement with the periphery thereof. The shoes have forwardly projecting arms I45, I46 pivoted upon a pin I41, connected through a link I48 and pin I49 to any appropriate part of the machine frame. The free end of the brake shoe MI is chambered at I50, thereby providing a cylinder in which a piston I5I is positioned. the latter having a stem I52 projecting downwardly through an appropriate openin in the lower face of the brake shoe into contact with a stop screw I53 carried by the forwardly projecting end of the shoe I42. A cap I54 closing the chamber I50, serves as a means for clamping a diaphragm I55'over the upper end of the chamber above the piston I5I. The cap is bored and threaded at. I56 for the reception of a compressed air pipe I51, leading from any suitable source of supply. The forward end of the brake shoe I4I also carriesa rod I58 projecting downwardly through an opening I59 in the shoe I42 and on which a relatively heavy coil compression spring I60 is arranged between the forward end of the brake shoe I42 and a lock nut IGI on the rod, so that the brake shoes are constantly drawn toward each other to apply a braking action to the drum I40. However, when air under pressure is admitted through thepipe I51, the diaphragm I55 is forced into contact with the upper face of the piston, which, through reaction of the stem I52 on the adjustable screw I53, overcomes the action of the spring I60 and separates the brake shoes.

Preferably, the supply of pressure air led to v the brake and to the clutch 22, through the pipes 30 and I51, is controlled by common valve means, such as that shown at I55 in Figure 3, so that the clutch is released and the brake applied simultaneously. by cutting off the supply of pressure air and relieving the air pressure in the respective chambers 7 simultaneously. Likewise, when the supply is turned on, the clutch is engaged and the brake simultaneously released,

In the operation of the machine, can bodies are fed from a suitable conveyor downwardly in the chute 95, where they arrange themselves in two vertical stacks in vertical chutes 91, 98 (Fig. 12) A pair of cans 44, 45, are held by the arcuate grippers I I4 on arms H3. At the start of a cycle the curled necks of the can bodies.

of operation, the cam 51, in engagement with the roller 56, swings the lever 36 forwardly, thereby advancing the slide 4| and the mandrels 42, 43, so that the latter are inserted into the can bodies. At this time, the preliminary curling die TI, I1

(Figs. 2 and 13) are in alignment with the cylin-v drical necks of the can bodies. The movement of the mandrels is continued by cam 51, with the result that the necks of the can bodies are forced into the curling grooves of the preliminary curling dies, as represented in Figure 14, anda preliminary curl is imparted thereto.

The cam 54, operating on the roller 53 carried by the rearwardly extending arm 53 of the lever 36, then retracts the mandrels a short distance, as indicated in Figure 15, and the can bodies move rearwardly therewith, the movement being assured by the wings I32 on the spring member I31 (Fig. 12). Simultaneously with this retracting movement'of the mandrels, the lever 38 is swung rearwardly by the cam I28 and the follower I21, thereby oscillating the rock shaft 69 in a direction to raise the vertical links l2l, connected to the cam feed mechanism. Hence, the arcuate grippers H4 are first swung outwardly, out of engagement with the cans 44, 45, and then the slides llll move upwardly until the grippers H4 are positioned opposite the next pair of cans 44a, 45a, the said cans being held in place by the spring-pressed retaining fingers l Also, during the period of retraction of the mandrels 42, 43, the cam 11, through its action on the roller [6, swings the lever 31 rearwardly, thereby raising the die-carrying slide 62 from its lowermost position, to its uppermost position, as indicated in Figure 16. In thi position, the

curling dies 84 are in alignment with the preliminarilycurled necks of the can bodies.

The contour of the cam 51 is such that the slide 4| and the mandrels are again advanced, to project the ends of thecan bodies into the second curling dies 84, as indicated in Figure 17, to effect a further curling of the necks. During the two curling operations, the positions of the die-carrying slide 62 and the dies are accurately determined by the'fianges 63, 63a (Fig. 8), abutting the upper and lower faces of the bracket 60.

Upon the completion of .the second curling operation, the mandrels and the can bodies are again retracted, and the die-carrying slide is lowered to an intermediate position (Fig. 19)

by the action of the cam 19 operating on the roller 18 carried by the lever 31. That lowering action aligns the abutment surfaces 31 with The mandrels and the can bodies are again advanced,

to cause the necks 3| to strike the abutment surfaces and thereby impart a final set thereto (Fig.

At the conclusion of the final, curl-setting step (Fig. 20), the--mandrels 42, 43 are withdrawn entirely from the can bodies, and the latter drop by gravity onto an appropriate outfeed conveyor (Fig. 21). Simultaneously, the lever 38 is rocked forwardly by the cam I in engagement with the roller I 29. The links |2l are thereby drawn downwardly, with the result that the arms H3 swing inwardly to cause the arcuate grippers H4 to engage the next pair of can bodies 44a, 45a (Fig.-12). As the downward movement of the links I2l continues, the slides H0 and the arms Ill move downwardly, and the cans 44a, 45a are drawn downwardly past the spring-pressed retaining fingers IOI, into aligna preliminary curling die, a

'die and a curl-setting abutment plate all carried die into ali nment with the ment with the mandrels 42, 43. The next pair of cans 44b, b, will now be retained by the fingers IOI, and the cycle of operation is repeated. During the discharge of the curled-cans and the feeding of a new pair of cans into alignment with the mandrels, the die-carrying slide is moved downwardly again to align the preliminary curling dies '11, 11', with the mandrels, as indicated in Figure 21.

As pointed out above, the invention is not limited to the details of construction shown herein, nor to all of the method steps described. For instance, {the invention contemplates that the preliminary curling step may be performed in a separate machine, such as in the body forming machine, and a neck-cleaning step may be interposed between the first and second curlingsecondary curling'dies, means for projectingthe end of a can blank into the primary die to effect a preliminary curling thereof andthen to retract the blank, means for shifting the dies relative to the blank to bring the secondary curling preliminarily curled end of the blank, means for forcing said end into the secondary die to effect a further curling operation, and means for withdrawing the blank therefrom.

2. A curling machine comprising primary and secondary curling dies having vannular curling surfaces and a curl-setting abutment plate, means for automatically, separately and successively presenting the end of a blank to the curling surfaces of the primary and secondary curling dies and for automatically shifting the to the blank before;-

position of the dies relative between and after said presentations, and means for projecting the curled end of the blank against said abutment surface to set the curl in the desired position.

3. A curling machine comprising a curling die having an annular curling groove in its end face, a curl-settingabutment plate, means for presenting the end of a blank the die to curl the end thereof, means for shifting th positions of the curling die and the abutment plate relative to abut ent plate with the curled end of the blank, and m ans for projecting the curled end of the blank against said abutment curl in the desired position.

4. A curling machine comprising a die slide, secondary curling by said slide, means for projecting the end of a blank into the first die and for withdrawing the same therefrom, means for shifting the slide to bring the second die into alignment with said end, means for projecting the end of the blank into the second die and for withdrawing the same therefrom, means for shifting the slide to bring the plate into alignment with said blank end, andmeans for projecting the curled end of the blank against said plate to impart a final set thereto.

5. A curling machine comprising a die-holding slide, preliminary, intermediate and final curling instrumentalities carried thereby, means for successively projecting and retracting a blank toto the curling groove in.

the blank, to align the plate, set. the

Ward said slide, and means for shifting the position of the slide during periods of retraction of the blank to cause the end of the blank. during the projections thereof, to be subjected successively to the operations of the preliminary, in-

and means for shifting said carrier to position,

separately and successively, different dies in alignment with the can blank, thereby to perform a plurality of independent curling operations on the blank.

7. A curling machine comprising a movably mounted die carrier, a curling die and a curl-setting abutment surface carried thereby, means for feeding can blanks into the machine, a mandrel for the blanks, means for projecting the mandrel and a blank supported thereon forwardly toward the die carrier and rearwardly therefrom a plurality of times in succession during each machine cycle, and means for shifting said carrier to position the curling die and the curlsetting abutment surface in alignment with each can blank, separately and successively, thereby to perform, independently, a curling operation and a curl-setting operation on each blank.

8. A curling machine comprising a die-holding slide, a preliminary curling die carried thereby, a substantially plane curl-setting abutment surface carried thereby, a blank supporting mandrel, means for projecting the mandrel and a blank into operative relation to the die to curl the end thereof and for then retracting the same, means for shifting the slide to position the abutment surface in alignment with the curled end of the blank, means for'projecting the mandrel forwardly to cause the curled end of the blank to abut said plate and then for withdrawing "the mandrel and the blank from the plate, and means for stripping the mandrel from the blank.

movement to align the second die'with the can blank, means for projecting the preliminarily curled end of the can into the second die and for then retracting the same, means for shifting the slide to an intermediate position to align said plate with the curled end on the can blank, means for projecting the mandrel and the blank forwardly to cause the curled end to abut said plate and for then withdrawing the mandrel and the blank from. the plate, and means for stripping tic mandrel from the blank. c

11. A can end-curling machine comprising a can body supporting mandrel, a cam shaft, connections between the shaft and mandrel for reciprocating the latter, a die-holding slide mounted for movement in a plane perpendicular to the line of movement of the mandrel, a curling die 9. A curlingmachine comprising a die-holding v slide, preliminary and final curling dies and a curl-setting diecarried by the slide in spaced relation to each other, a can blank supporting mandrel, means for projecting the mandrel and blank into operative relation to the-first die to effect a preliminary curl and for then retracting the same, means for shifting the slide to align the final curling die with the can blank, means for projecting the .mandrel and the preliminarily curled end of the blank into the final die and for then retracting the same, means for shifting the slide to align the curl-setting die with the curled end of the blank, and means for projecting the mandrel and the curled blank forwardly to cause the curled end to abut to engage the curl-setting die and for then retracting the same.

.10. Acurling machine comprising adie-holding slide, apreliminary curling die at one end thereof, a final curling die at the other end thereoff and a substantially plane, curl-setting abut ment plate carried at an intermediate point on the slide, a can blank supporting mandrel, means for projecting the mandrel and a blank into operative relation to the first die to effect a preliminary curl and for then retracting the same,

and a curl-setting die carried by the slide, and connections between said cam shaft and said slide for reciprocating the latter in timed relation to movements of the mandrel, whereby the end of a can body is presented to and retracted from said curling die and said curl-setting die successively. I

12. A can end-curling .machine comprising a can body supporting mandrel, a cam shaft; con

nections between the shaft and mandrel for rel ciprocating the latter, a die-holding slide mounted for movement in a plane perpendicular to the line of movement of the mandrel, a pair of curling dies carried by the slide, and connections between said cam shaft and said slide for recipro-- cating the latter in timed relation to movements dies and acurl-setting abutment surface carried by the slide, and connections between the cam shaft and said slide for reciprocating the latter in timed relation to movements of the mandrel,

whereby the end .of a can body is presented to and retracted from the two curling dies and the curl-setting abutment surface successively.

14. A can end-curling machine comprising a horizontally reciprocable can body supporting mandrel, a camshaft, connections between the shaft and mandrel for reciprocating the latter, a vertically reciprocable die-holding slide, a plurality of curling instrumentalities carried by the slide, and connections between said cam shaft and said slide for reciprocating the latter in timed relation tomovements of the mandrel, whereby the end of the can body is presented to and retracted from said instrumentalities successively.

15. A can end-curling machine comprising a cam shaft, a reciprocable mandrel-supporting slide, a mandrel carried thereby, connections between said shaft and said slide for reciprocating the mandrel, means for feeding blanks into the path of movement of the mandrel, connections from said cam shaft to said feeding means for feeding blanks in timed relation to the movements of themandrel, a die-holding slide mountedfor movement in a plane transverse to the line of movement of the mandrel, a pair of dies car-- ried thereby, and connections between said camshaft and said die-holding. slide for reciprocating means for shifting the slide to its other limit of 15 the latter in timed relation to the movements of mandrel, a die-holding slide mounted for movement ina plane transverseto the line'of movement of the mandrel, a pair of dies carried thereby, and connections betweensaid cam shaft and said die-holding slide for reciprocating the latter in timed relation to the movements of the mandrel, whereby each can body blank is fed to the mandrel and is presented by the mandrel to and retracted from said dies successively.

17. A can end-curling machine comprising a horizontally reciprocable blank supporting mandrel, means for feeding blanksinto the path of .movement thereof, a vertically movable die slide,

a pair of end-curling dies carried by the slide, and cam means for operating the mandrel, the

, blank feeding means, and the die-holding slide,

said cam means serving to feed a blank into position to receive the mandrel, to project the mandrel and a blank and thereby present the end of the blank to one of said die and then retract the blank, to shift the position of the die slide and project the blank into the second die and then retract the same; and thereafterto'retract the mandrel from the interior of the blank.

18. A can end-curling machine comprising a horizontally reciprocating blank-supporting manciprocable can feeding means for delivering blanks into the path of movement of the mandrel, a vertically reciprocable die-holding slide, and means for actuating the mandrel, the feeding means and the slide in predetermined timed relation to each other, said means comprising a continuously rotating shaft having a plurality of cans thereon, a plurality of levers fulcrumed below the cam shaft, and each having cam following means associated therewith,and connections between said levers and said mandrel, said feeding means and said slide, respectively.

, 21. A can end-curling machine comprising a horizontally reciprocable mandrel, vertically; reciprocable can feeding means for delivering blanks into the path of movement of the mandrel, a-

. vertically reciprocable die-holding slide and means for reciprocating the mandrel, the feeding means and the slide in predetermined timed relation to each other, said means comprising a continuously rotating cam shaft, a plurality of pairs of cams thereon, a plurality of levers fulcrumed below the cam shaft, and each having a pair of cam following means associated with the cams of one of said pairs, whereby one cam of each pair shifts the associated lever in one direction and the. other cam of each pair shifts the lever in the opposite direction, and connections between said levers and said mandrel, said drel, means for feeding blanks into the path of movement thereof, a vertically movable die-holding slide, a pair of end-curling dies and a curlsetting abutment plate carried by the slide in spaced relation to each other, and cam means for operating the mandrel, the blank feeding means, and the die-holding slide, said cam means servingto feed a blank into position to receive the mandrel, to project the mandrel and a blank carried thereby forwardly and rearwardly to present the end of the blank to one of said dies and then to retract the blank; to shift the position of the die-holding slide and project the blank into the second die and then-retract the same; to shift the position of the die-holding slide and then project the blank against said abutment surface, and then to retract the mandrel from the interior of the blank.

19. A 'can end-curling machine comprising a cam shaft, 9. horizontally movable mandrel, a-

cam following lever having an end positioned to reciprocate the slide, means for feeding blanks into the path ofmovement of the mandrel, a vertically reciprocable die-carrying slide, and means for actuating the blankfeeding means and the die slide in predetermined timed relation to the movements of the mandrel, said means comprising a rock shaft, and connections between the cam shaft, the rock shaft and the slide and blank feeding means.

20. A can end-curling machine comprising a horizontally reciprocable mandrel, vertically recurl.

feeding means and said slide respectively.

22. A can end-curling machine comprising-a can blank supporting mandrel, means for reciprocating the same horizontally, a vertically disposed die-holding slide, a preliminary curling die at the upper end of the slide, a second curling die at the lower end of the slide, a plane curlsetting surface positioned between the curling dies, means for lowering the,slide to its lowermost position to align the first die with the end of said blank, means for projecting and retracting the mandrel to impart a preliminary curl to the end of the blank, means for raising the slide to its uppermost position to align the second die with the can end, means for again projecting and retracting the mandrel toimpart a further curl to the can end, means for lowering the slide substantially midway between the first-mentioned positions to align to curl setting surface with the can 'end, means for again projecting the mandrel to cause the curled end to strike said surface and to impart a final set to the curl, and,

- curling die having an annular curling groove in its end face, a curl-setting surface, means'for supporting a can body blank with the end to be curled in alignment with said die and facing said groove, means for relatively moving the die and the blank to cause said end to engage said annular groove, whereby a curl is imparted thereto, means for separating the die and the I blank, means for aligning the blank and said curl-setting surface, and means for moving the curled end of the blank and said surface into engagement to partially flatten and finally set said AMOS CALLESON. EDGAR A. CALLESON.

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