US2308276A - Method and machine for making closure caps - Google Patents

Description

Jan. 12, 15943. c; GIBBS 2,308,276"

METHOD AND MACHINE FOR MAKING CLOSURE CAPS Filed Jan. 25, 1939 5 Sheets-Sheet 1 HIHIIIIII INVENTOR Jan. 12, 1943. c, I S 2,398,27

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METHOD AND MACHINE FOR MAKING CLOSURE CAPS Filed Jan. 25, 1,939 5 Sheets-Sheet 5 INVENTOR- PatentedJan. 12, 1943 METHOD'AND mom FOR MAKING CLOSURE cars I 1.1... 'o. Gibbs, New York, 'N. Y., assignor to Anchor Cap & Closure Corporation, Long Island City, N. Y., a corporation of New York Application January 25, 1939, Serial No. 252,741

24 Claims. (-01. 153-2) The present invention relates. generally to the closure caps, having an inturned bead or wire edge at the bottom thereof.

For many years, closure capshave been made with a beaded edge to straighten the skirt of the cap, to conceal the raw edge and prevent rust, andto improvethe appearance of the caps. The head has been formed by stamping a hat-shaped blank and thereafter rollingthe brim or flange upwardly on the outside of the skirt into a wire edge. This has the disadvantage of making both sides of the metal from which the cap is formed visible from the exterior of the cap. If the inside ofthe cap is coated yellow and the outside coated black, the resulting cap is black with a yellow head at the bottom. The objection has been so great that during the last three or four years caps have been sold with an inturned wire edge whichgives the solid color throughout the cap and exposes but one side of the metal forming the cap. It was found, however, that the method for'making the capswith the outturned wire edgecould not be used ,for the manufacture of caps with the inturned edges. The former weremanufactured in rolling machines which were able to deliver several hundred capsa minute because it was a continuous rolling operation whereas the latter had to be manufactured on what is termed'di'al machines, an example of which is shown in my application Serial No. 168,536, filed October 12, 1937, now Patent No. 2,282,959, granted May 12, 1942, and which are operated at a much'slow'ers'peed, in most cases less than'half the speed of the rolling machines. In' addition, the units are larger, more expensive and require more attention in operamanufacture ofclosure caps and more particu- 1 larly to a method and machine for making tion and thefsame number of operators as a roll-5' ing machine. Hence, the cost of labor is practically doubled inthe'actual forming of the caps.

As a'resulti the inturned edge caps have been generally sold at a higher price and at'a lowerim'proved caps are concededly better and more profit/than the regular types of caps. While the' attractive than the prior types of caps, they have; not lieenadopted generally due to their-higher manufacture hat-shapedblanks-"downwardly instead of up To" decrease costs, at- .tenipt's were madeto roll the usual flange of the wardl-y; but the resulting caps were' not 'satisfactory and the method was not a success.

bead onacup-shaped" blank atthe' "sani'espeed as machines heretofore have rolled outturned'wire edges on closure caps, thereby enabling manufacturers to make inturned edge closure caps at the vide an improved method and machine for mak- 1 ing closure caps with an inturned edge or wire.

Another object of the invention is to reduce the cost of manufacture of closure caps with an inturned bead.

Another object of the invention is to provide a machine and method for manufacturing closure caps with an inturned bead in a continuous, as distinguished from an intermittent, operation at a high rate of speed.

Another object of the invention is to provide an improved means for feeding caps to a forming machine.

Another object of the invention is to provide an improved means for ejecting orremoving the caps from the machine.

Other and further objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described, or will be indicated in the appended claims, and various drawings, forming a part of the specification,

wherein Fig.1 is a side elevational view of the machine; Fig. la is a sectional view of a blank adapted to be operated upon by the ma'chineto form a closure cap; I v v Fig. 2 is a top plan'view of the machine; Fig. 3' is a sectional view of one of the forming head's illu strating details thereof taken on the line 3%; of Fig-1; f

Fig. 4 is a fragmentary detail view illustrating the movement of the caps alongthe guideway of the-feeding mechanism taken onv the line 4'4 ofFig.5; J

Fig. 5 is a fragmentary side. elevational view of the feeding mechanism shown in Fig. 4;

Fig. .6 is a of Fig.4)

Fig-J7 -is a sectional view along. the line '|-'-'-l of Fig. 4,; illustrating means for stopping the flo of caps to the machine when desired;

Fig. 8 is 'a sectional view along the line 8f-"8,

performed ofFig 1 illustratingthe first operation 7 on'theblank illustrated in Fig; 1d;

Fig. 9 is a sectionalv view along the line 9-. -9

sectional view along th i 5 of Fig.1'illustrating the second operation performed on the blank;

Fig. is a fragmentary sectional view illustrating details of the mechanism for ejecting blanks from the chucks after the first operations areperformed, taken on the line IG-lll of Fig. 1;

Fig. 10a is an enlarged sectional view illustrat- Fig. 11 is a fragmentary sectional view illustrating the removal of the caps from the first forming head, taken on the line I|--| of Fig. l; and

Fig. 12 is a fragmentary sectional view along the line 'I 2|2 of Fig. 1 illustrating the third and final operation performed on the blank in making a closure cap.

Described generally the preferred embodiment of the machine, which illustrates one way of performing the method, comprises a cap feed shown generally at l in Fig. 1 for feeding the blanks 2 ing the operation of the mechanism shown in Fig.

illustrated in Fig. 1a toa head 4 where the lower edge of the blank is turned inwardly as shown in Fig. 8 and immediately thereafter a screw thread is formed in the cap as shown in Fig. 9. The blanks are then ejected by the mechanism shown generally at 5 in Fig. 1 and illustrated in Figs. 10, 10a and 11. The partly finished caps are then delivered by a feeding mechanism la, similar to the feeding mechanism I, to a second forming head 6 where the partially formed bead is completed as shown in Fig. 12. Thereafter the caps are ejected at 1.

Referring to the drawings, Figs. 4, 5 and 6 illustrate details of the cap feed shown generally one cap at a time in a manner to be described. A second stop l5 rotatably mounted on the pin it below the first stop has its lower end I] extending into the channel and in the path of the blanks to stop and position the lowermost blank. The

passes, a blank is delivered to the chuck and a second blank is released by the stop l4 so that it may drop against the stop l5 and be held in position for the succeeding chuck. The stop |4 serves to keep the line of caps spaced from the forward blank which is in position to be delivered to a chuck.

In certain cases, it may be necessary to stop the feeding mechanism without stopping the forming machine. For this purpose, a mechanism is shown in Figs. 4, 5 and 7 adapted to be operated to prevent the caps from moving past it in the guideway Ill. The mechanism comprises a pin 26 having a spring 21 tending to force it upwardly in the path of the blanks. The

pin is held in ineffective position by a latch member 28 pivotally mounted at 29. A projection fits under a collar 3| normally to hold the pin 26 in ineffective position. If the operator desires to stop the feed of caps, he presses the latch member 28 in the direction of the arrow which removes the projection 30 from under'the collar 3| and permits the pin 26 to be forced into the guideway to stop the movement of caps. When it is desired to start the cap feed again, the collar 3| may be gripped to pull the pin out of the path of the blanks, in which case the latch member 28 is forced into its operative position by a spring 32 to engage and hold the pin in inoperative position.

The blank after being fed to the chuck 2| passes through the head 4, shown generally in Figs. 1 and 2 and in detail in Fig. 3, where the lower edge of the cap is inturned inwardly, as shown in Figs. 3 and 8, and a screw thread is formed in the cap as shown in Fig. 9. Referring more particularly to Fig. 3 of the drawings, the head '4 comprises a supporting bracket 34 having a bearing 35 in which a shaft 38 is mounted by a nut 31. .A stationary disc 39 is keyed to the shaft 36 at its opposite end and a rotating disc 4|! is mounted on the shaft 36 through the intermediation of the roller bearings 4|. The disc 40 has gear teeth 42 on its periphery which mesh with a gear 44 (Fig. l) for driving the disc.

Aseries' of chucks 2f are rotatablym'ounted in bearings 45 spaced equidistantly adjacent the stop I5 is held in its operative position by means of a pin l8 mounted in a bracket and held resiliently against the stopby a spring 20. The purpose of the cap feed is to deliver blanks one at a time to the chucks 2| moving in a circular path as shown in Figs. 3, 4 and 5. As will be noted in Fig. 5, the guideway I0 is inclined at an angle to the path of the chucks 2|. Thus, the blanks are delivered in tilted position so that each chuck 2| may engage the skirt or flange of a blank to force it past the stop l5 and seat it on the chuck for the subsequent forming operations. In order to relieve strain on the blank when the chuck engages the skirt while moving at a rapid speed, a roller 22 is mounted on the lower end of the stop I! by a pin 24. The roller 22, as shown in Figs. 4 and 5, extends into the path of the chucks 2|. Preferably the relative position of the roller periphery of the rotating disc 40.. Each chuck has a gear 43 meshing with gear teeth on the periphery of the stationry disc 39. As the disc 48 is rotated, the chucks 2| are rotated with it about the shaft 36 and are also rotated, by means of. the gears 46 meshing with the gear teeth 41, about their own axes.

Each chuck 2| (Figs. 3, 8, 9 and 10) has a disc 48 forming a shoulder adjacent the lower edge of the blank and a ring 49 havin a spiral groove 50 therein for forming a thread on the cap. The discs and ring are held in position by a flanged nut ll threaded to thesupporting shaft 52 for the chuck. The stationary disc 39 has a series of plates 54, 35 and 58 mounted adjacent its periphery with parts adapted to cooperate with the chuck for forming the inturned edge and the 22-and the chuck 2| is such that the roller 22 is engaged and pressed outwardly at or just prior to the engagement of the chuck with the front edge of the blank. In this way the blank is automati- 'cally released independently of any pressure applied to it directly by the chuck. The release of I! in the v-shaped notch 25. mus, as each chuck- 13s is substantially a continuation g t e ma thread in the blank as shown'more particularly in Figs. 3, 8 and 9. The plate I! has a groove I fitting about the disc 43 on the chuck and adapted to bend the edge of the cap about the disc 43 on the chuck as shown more particularly in Fig.

a. while the plate l3, could be utilized for form ing the thread, it is preferred to have a second section inrthe head 4 as shown in Fig. 9 with plates .440, "a and "a in whichthe thread is formed. It will be noted in Fig. 8 that-the plate 55 with a groove for the inturned edge of the cap. The plate 580, however, has a rib 58 which corresponds in slope or inclination to the groove in the chuck 2|. The plates 54, 55 and 58 are held in position by a plate 59 bolted to the periphery of the disc 89. Plate 59 extends outwardly beyond the chucks 2| to hold the blanks in position thereon. A cover plate 60 extends over the entire mechanism as shown in dot and dash lines in Fig. 3. As the blanks on the chucks 2| pass about the disc 89, the edge of the blank is first turned inwardly and thereafter in a second stage the thread is formed in the cap in a continuous operation.

The mechanism for removing the partially fln ished caps from the head 4 and delivering them to the head 5 where the blanks are finished is,

chuck having substantially the same size as the.

inturned flange of the blank. The ring 6| is supported by pins 62 which are moved in and out by a shoulder 84 on a 'pin 85 extending centrally and axially of the chuck shaft 52. The pin 85 is held in ineifective position by a spring 85 mounted in a recess 81in the supporting shaft 52 of the chuck and pressing against a collar 68 on the pin 65.v The end of the pin 65 is threaded to receive a nut member 89 which has a ball I8 mounted in the end thereof by means of -a-plate H secured inposition by screws12. The-pin 55.

is normally ineffective, but when the chucks on the end of pin 65 engages a cam '14 which compresses the spring and forces the shoulder 64 against the ends of the pins 62 to 'centralize the ring 6| with-respect to chuck 2| as shown more particularly in Fig. 10a. When the blank is-thus centralized by the ring 6|, there is no possibility of the flange .of the blank interlocking with the disc 48 and the cap may be removed from the chuck. I

The removal may be efiected in any suitable manner but preferably cams engage the bottom of the blank as shown more particularly in Figs. 10a and 11 to remove the blank from the chuck and to deliver it into a guideway I8. In order to prevent any possibility of the blanks dropping back into the head 4, a stop preferably provided at 11 and a second stop or detent is provided at 18. If a blank should not go all theway into the guideway 16, the succeeding cap delivered by the succeeding chuck 2| will force it past the second detent and eliminate any possibility of its getting into the machine. The guideway I6 may have a removable cover or window where the caps may be removed for inspection.

The guideway 16, shown more particularlyfin Fig. 1, delivers the caps down to a cap feed la similar to the cap feed I and the cap feed la delivers the partially finished blanks to the chucks in the head 5 in a similar manner to that described in connection with the cap feed I.

Therefore, a further description of the cap feed for the second head is'not necessary.

. land 2) is geared to the intermediate 'gear '44 which also meshes with-the rotating disc 40-of 4.0 reach the ejection point, the bearingv or ball '10 v The forming head l-isadapted to roll'the inturned flange of the blankupwardly and outwardly against the flanseor skirt of the blank to form an'inturned bead or wire edge as shown wardly while the skirt of the cap is supported in the plates 80 and 8|, as illustrated in detail in Fig. 12. The chuck and ring 48a force the inturned edge on the blank firmly against the skirt of the blank to form a completed inturned bead or wire edge. Only one side of the sheet metal forming the cap is visible from the exterior of the cap. The construction of the chuck 2hr is different from chuck 2| among other respects in that the parts are held in position by a screw or bolt, 82. Since the inturned edge of} the blank has been turned upwardly to form an inturned head or wire, there are no projecting parts likely to interlock with the chuck and hence the cap centering device shown more par-- ticularly in Figs. 10 and 11 is not desirable in connection with the ejecting mechanism of' the second head, although suchmeans could be used."

The cam mechanism for-removing, the ca'ps'andthe stops for the caps may be similarto those illustrated and described in conneotionwith the first forming head and a description. isnot 'be-' I 7 ing repeated'here. The rotating disc 40a (Figs.

the forming head 4.. Thus the two forming heads are interconnected and timed with respect to each other. Inithis way-the-output of each in the form of a resilient button or detent is is the same and the second forming headwill be prepared to receiveallblanks delivered b 'the flrst forming head. I I

desirable to turn the machine over manuallyto ascertain if .all the In some cases it may be parts are in working order. For this purpose-an idling gear on a stub shaft meshes with gear 86 mounted upon main drive shaft 81 which has a socket 88 adapted to be engaged by an op-' erating crank. The drive shaft 81 is driven by a suitable motor (not shown) to operate themachine.

diflerent sizes of gears 40 and.84 and to permit accurate adjustment by the handle 98 so that the Q Y gears mesh properly for driving the machine.

In the operation of the machine blanks 2, illustrated in Fig. 1a, are delivered by a suitable j stamping machine to the guideway NJ where. the

thereby permit the cap to move out of the guideway on the chuck 2|.

The bracket .98 adjustably held in posi-' tion by the bolt 9| is adapted toaccommodate Operation of the stop 15 v likewise operates the stop I4 to deliver another cap in a position to be engaged by thenextsucceeding chuck. The chucks 2lmove with therojtating disc 40, about the stationary disc 39...-'and ,1 are rotated. about their respective axes .by; gear's 1 48 meshing with the gear 4| on the periphery of the disc 38., The blankszpasstheformingplates 54, 55 and 56 where the plate '55 forms an in Thereafter,

turned flange on the bottom of the blank as shown more particularly in Fig. 8. In a subsequent section of the forming head a plate 56a with a rib 58 thereon forms a continuous thread in the blank. After the thread and fiange are formed, the chuck passes the delivery point where a cam M engages the end of the pin 65 which centers the ring SI of the chuck, which in turn centers the blank on the chuck and prevents any interlocking of parts. The blank thus centered is engaged by the cams I which remove the blank from the chuck. Stops 11 and 18 (-Fig. 11) prevents any possibility of the blanks dropping back into the forming head. The partially formed blanks pass through guideways l6 and are fed to a second forming head 6 where chucks 2 la therein carry the blanks past plates 80 and 8| (Fig. 12).

It will be seen that the present invention provides a machine in which a screw thread is formed in the cap and the cap provided with an inturned bead or wire edge in a continuous rolling operation. The caps may be manufactured with the speed of a rolling machine and bumping operations requiring dial feeding are completely eliminated. The caps may be made with the same labor cost as ordinary screw caps with outwardly rolled edges and thus a better product can be sold at the same price as the present less desirable form of cap. The machine'is rugged in construction with little likelihood of the parts becoming disarranged or broken. It will be understood that while the present method and machine are shown applied to screw closure caps that it may be utilized in any instances where any inturned bead or wire is desired, regardless of the other structural features added to the cap.

As various changes may be made in the form, construction and arrangement of the parts herein without departing from the spirit and scope of the invention and without sacrificing any of its advantages, it is to be understood that all matter herein is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim:

1. The method of forming a thread and an inturned bead or wire in the manufacture of a closure cap or similar article, which method comprises spirming the lower edge of the cap blank inwardly, rolling the thread in the cap :blank prio flange upwardly and outwardly against the skirt.

of the cap blank in a single continuous operation. 2. The method'of forming an inturned wire or beaded edge in the manufacture of a closure cap or similar article, which method comprises spinning the lower edge of the cap blank inwardly and in the same operation forming a screw thread in the cap blank, and thereafter in a substantially continuous movement of the cap, spinning said edge outwardly against the skirt of the cap'blank to complete theformation of the bead.

3. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck to enter and carry a blank,-means means for removing the blank from said first chuck and placing it on said second chuck, means for forcing said inturned edge upwardly and outwardly against the skirt of the cap blank while on said second chuck, and drive means for moving said chucks past the respective means effective thereupon.

4. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck to enter and carry a blank, means for turning a part of the metal of the blank inwardly while on said chuck, a second chuck, automatic means including guide members engaging the bottom of the blankfor removing the blank from said first chuck and holders for removably supporting the blank in the path of said second chuck, means for forcing said inturned part of the metal of the blank outwardly while on said second chuck, and a common drive for operating the finished caps are delivered said chucks in timed relation with respect to each other.

5. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter and carry a blank, means for turning in the lower edge of the blank while on said chuck, means for forming a screw thread in said blank while on said chuck, a second chuck, automatic means including a guideway for removing the blank from said first chuck and holding it in position to be engaged by said second chuck, means for forcing said inturned edge upwardly and outwardly against the skirt of the cap, and a common drive means for moving said chucks in timed relation with respect to each other past the respective means effective thereupon.

6; In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter and carry a cap blank, means for rotating said chuck about its axis, means for engaging the lower edge of the blank on said rotating chuck to roll the lower edge inwardly, a second chuck, means for moving said chuck in different orbits and in timed relation to each other, means for rotating said second chuck about its axis, and means for removing the blank from said first chuck and holding it in the path of said second chuck whereby it becomes nested over said second chuck and means for cooperating with said second chuck to roll said inturned edge upwardly and outwardly against the skirt of the cap to form a beaded edge.

7. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter and carry a blank,

means for rotating said chuck, a stationary forming tool adapted to cooperate with said chuck,

and means for moving said rotating chuck past placing it on said second chuck, a stationary forming tool for cooperating with said second chuck, means for rotating said second chuck, means for moving said second rotating chuck past said stationary forming tool to force said inturned edge upwardly and outwardly against the skirt of the cap toform a bead.

8. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuckadapted to enter and carry a blank for turning the lower edge of the blank inwardly for a closure cap, said chuck being of a smaller diameter than said blank, a stationary forming asoaavc tool adapted to cooperate with said chuck, means for rotating said chuck about its axis, means for moving said chuck past said stationary forming tool for turning in the lower edge of the blank to form an intumed flange and for forming a screw thread in the blank, a second chuck, auto-v matic means for centering the blank about the first chuck to prevent interference between the flange and the chuck, means for removing the blank from said first chuck and applying it to said second chuck during the movement thereof, a stationary forming tool adapted to cooperate with said second chuck, means for rotating said second chuck and means for moving said second chuck past said stationary forming tool to complete the formation of the bead on said closure cap.

9. In a device of the class described, the combination of a chuck adapted to enter and carry a blank for a closure cap, said chuck being smaller than said blank, means cooperating with said chuck for turning in the lower edge of said blank about a part on said chuck, means for engaging 14. In adevice for feeding blanks for closure caps to a forming machine, the combination of a guideway, a chuck adapted to engage and enter the blanks in said guideway and for removing the blanks from the guideway, a member for resiliently holding a blank-in position to be engaged by the chuck, a second member for'holding a second blank spaced a substantial distance from said first blank so as to allow said chuck said blank and centering it on said chuck so that the intumed flange on the blank will not engage said chuck in the removal thereof and means for removing said blank from the chuck.

10. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter-and carry aclosure cap, said chuck being smaller than a blank,

means cooperating with said chuck to-form an intumed flange at the bottom of said blank and means associated with said chuck and adapted a chuck for entering and carrying a closure cap,

means cooperative with the chuck to force a porf tion of the skirt inwardly, expandingmeans including a ring member for engaging the lower edge of the blank to center the blank on the chuck and to prevent interlocking of the inwardly forced parts of the blank with parts of the chuck during the removal operation and means for operating said expanding means.

12. In a device of the class described, the combination of a chuck adapted to enter and carry a cup-shaped blank, means adapted to cooperate with said chuck to perform operations comprising the bending of parts of the blank from the exterior of the blank inwardly, a second chuck, means for centering the blank about the first chuck to prevent interference between the chuck and the inwardly bent parts of the blank and for transferring the blank from the first chuck'to said second chuck and means cooperating with said second chuck to bend portions of said blank from the interior thereof outwardly.

13. In a device of the class described, the'combination of a chuck adapted to receive a closure cap, means cooperating with said chuck and .effective upon the exterior of the cap to form an inwardly extending thread in said blank and an intumed edge at the bottom of said blank, a second chuck, means for removing the blank with the inturned edge and thread from said first chuck and placing it on said second chuck and means cooperating with said second chuck to bend said edge upwardly and outwardly into a completed wire or beaded edge, and a common drive for operating said chucks.

' of the cap blank tofform. an intumed bead or to move into said second blank without disturbing the position of said first blank, said first member being pivoted intermediate its ends to said guideway and having a portion adjacent one end thereof adapted to operate said first member and having means adjacent the other end thereof extending into the path of the chuck adapted to be operated by the chuck to release said first blank and said second blank to permit said second blank to replace the first blank after it is moved out of the guideway. by the chuck.

15. In a device for forming aninturned bead on a closure cap or similar article, the combination of an elongated-forming. section, means extending into and rotatably supporting-the closure cap to move it in a path'a'long, saidelongated forming section to spin the J lower edge of the cap inwardlyj intoasubstantially horizon- .tal flangefa second elongated forming section, devicesfor subsequentlyextending into and -ro I tatably supporting the closurecap and moving it i along said elongated forming section to spinsaid flange upwardly and outwardly against theside- [of the'cap to forman' intumedbead or wire edge, fand mechanismfor centering ablank on said'. means and removing it' from saidmeans ontoone 1 of said devices.

'16. In adevicefor forming an-mtumedibead on a' closure cap or similar'article, the combina 1 tion of means for; spinning the lower edge of the cap blank inwardly into :a substantially horizontal flange, devices for subsequently spinning said,

flange upwardly and outwardly against "the side wire edge and mechanism: for transferring the cap blank fr'omsaid means to said devicesanda drive for operating saidmeans and said devices in timed relation with respect toeach other.

17. The method of; forming an inturned bead V or wire edge at the bottom of a closure cap blank 3 having a substantially cylindrical lower part.

which method comprisessimultaneously rotating the cap and moving it along aportion of an orbit, applying pressure ina. direction substantially 7 radially inwardly of the cap blank to spin a portion of the lowerflcylindrical part of the-cap blank into an intumed flange and subsequently completing the bead by simultaneously rotating the cap blank and moving it along a portion of a different orbit and applying pressure substan- I tially outwardly radially of the cap blank to fold said intumed flange against the skirt of the cap.

18. The methodof forming an inturnedbead or wire edge on} a closure cap or similar article,

which method comprises moving a cup-shaped blank having a cylindrical lower part alongfa portion ofan orbit and'simultaneously rotating the blank and spinning the lower edge thereof inwardly into an inturned substantiallyhorizontal flange-and moving said blank along a portion 1: of a different orbit and simultaneously rotating i the blank and spinning said vintumed flangeupwardly and outwardly against the side blank .to form an intumed bead or wire-edge.

- 19. The method of formingan intumed bead or wire edge in themanufacture of a closure cap or similar article, which method comprises forming a cup-shaped blank with an annular substantially-cylindrical band at the bottom offset outwardly, spinning the lower edge of said band inwardly to form an intumed flange by pressure applied in a direction substantially radially inwardly of the cap while moving the cap along a portion of an orbit, continuing the movement of the cap into a different orbit completing the bead by applying pressure to said intumed portion radially outwardly of the cap while the cap is moving along a portion of said orbit and forming a screw thread in said cap while moving in one of said orbits.

20. The method of forming a thread and intumed bead or wire edge in the manufacture of a closure cap or similar article, which method comprises moving a cup-shaped blank in a path, rotating the blank during said movement to spin inwardly the lower edge of the cap blank, forming a thread in the cap while the rotating blank is moving in said path and, subsequent to the continuous operation of forming the thread and the inturned edge, moving said blank in a different path and completing the formation of the bead by forcing said intumed edge upwardly and outwardly.

21. The method of forming an intumed bead or wire edge in the manufacture of a closure cap or similar article, which method comprises moving a cup-shaped cap blank having a cylindrical lower part in a plane, rotating the cap blank about an axis perpendicularly to the plane of movement, spinning the lower edge of the cylindrical part of the cap blank inwardly into an intumed edge to partially form a bead on the bottom of the skirt forming a thread in the cap blank, and thereafter completing the formation of the bead in the cap after the formation of the thread by spinning said intumed edge outwardly in a continuous operation.

22. In a device of the clas described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter and carry a blank for a closure cap, said chuck being of a smaller diameter than the blank, means cooperating with the chuck for forcing inwardly a portion of the blank, expansible means including a freely mounted ring member associated with said chuck, and a pin extending axiallyof the chuck with a shoulder thereon, said pin through the intermediation of said shoulder being adapted to expand said expansible means to centera cap blank on said chuck when the pin is moved in an axial direction to prevent interlocking of the inwardly forced part with the chuck.

23. In a device of the class described, the combination of means for feeding blanks for closure caps, a chuck adapted to enter and carry a blank for a closure cap, said chuck being smaller than the blank, means cooperating with said chuck to force the flange of the blank inwardly to form a screw projection therein and means associated with said chuck and adapted to center said blank on the chuck at the time of the removal to prevent the screw means from interlocking with parts of the chuck during the removal operation. I

24. In a device of the class described, the combination of means for feeding blanks for closure caps, said blanks having an intumed flange at the bottom thereof, a chuck adapted to enter and carry a blank, said chuck being smaller than the blank, means for rotating said chuck about its axis and for moving it in an orbit, and means cooperating with the chuck to apply pressure radially outwardly against said flange to force said flange upwardly and outwardly against the inside of the flange of the blank during said rotary and orbital movement to form an intumed bead on the blank.

JOHN C. GIBBS.

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