US2064770A - Method and apparatus for manufacturing bottle caps - Google Patents

Description

Dec. 15, 1936. I w. M. YVOGEL METHOD AND APPARATUS FOR MANUFACTURING BOTTLE CAPS Filed May 24, 1933 INVENTOR IVZZZzarrz/Zadz'rz l l IL v Patented Dec. 15, 1936 UNITED STATES PATENT OFFICE METHOD AND APPARATUS FOR MANUFAC- TUBING BOTTLE CAPS 31 Claims.

My invention relates to closure caps for jars, bottles, and the like, the invention being more particularly related to a method and apparatus for manufacturing such caps.

One of the objects and purposes of my present invention is to provide a method and apparatus for the production of closure caps produced with integral inturned beads and lugs having resilient characteristics and which are so formed that an easy, smooth, and resilient turning action will be had both on the application of the caps to, and on their removal from, the spirally-disposed threads of the bottles; and further that when the caps are tightened upon the bottles, an efficient locking, sealing, and binding action will be had, which action, although sufficiently resilient to enable easy removal of the caps by the fingers, will nevertheless be sufficiently firm to prevent accidental removal or any rocking or wabbling of the caps.

I have found that the desired results may be accomplished in a highly advantageous manner by inbending the entire circumferential rim portion of the annular flange or skirt of the cap into a resilient bead, and also bending or pressing from the bead as it is being formed, one or more resilient, inwardly directed, free-edged thread-engaging lugs.

The bead and the lugs are produced at the same time and therefore possess an inherent inter-communicating resiliency which makes itself felt in the smooth yet positive binding and sealing action effected with the threads of the, bottle. The base portion of each lug is symmetrical with the bead, having-therewith the same curved form. From its base portion, each lug is pressed radially inwardly of the bead and sloped toward the crown of the cap so that upon the application of the cap, the free edge of the lug will engage and contact the underside of the screw-thread at an angle. The base portion of the lug being symmetrical with the bead and the opposite end portions of the lug merging on a curve into the bead, the thin lug is strengthened, a too great yielding thereof is avoided and a smooth application and tightening of the cap are obtained even under a strong and sudden application of pressure, inasmuch as the bead is to an appreciable extent responsive to the yielding of the lug while preventing any undesirable yielding of the latter.

For the purpose of carrying out my present invention, I have devised a very simple apparatus for automatically forming the bead and lugs at a single operation. This apparatus may be operated with great rapidity, providing thereby for the production of the caps in very large quantities and at low cost.

With the above and other objects in view, my invention consists in the improved method and apparatus and in the combination and relative arrangement of the component elements, as will be hereinafter more fully described, illustrated in the accompanying drawing, and finally claimed.

In the drawing, wherein I have illustrated one simple and satisfactory example of my apparatus for carrying out my new method and in which similar reference characters designate corresponding parts throughout the several views:-

Figure 1 represents a. front elevation of my improved apparatus; i

Fig. 2 is a longitudinal sectional view through the forming tool;

Fig. 3 is a fragmentary detail section showing the parts of the tool in the relative positions they occupy while in the act of producing the bead and lugs;

Fig. 4 is a transverse section taken on the line 4-4 of Fig. 2, but with the anvils omitted;

Fig. 5 is an underneath plan view of the tool;

Fig. 6 is an underneath plan view of the cap produced by the apparatus;

Fig. 7 is a fragmentary detail view, more or less diagrammatical in character, showing a pressed lug together with the anvil and former for producing the same, these parts being illustrated in proper though separated relation;

Figs. 8 and 9 are sectional views taken respectively on the lines 8-8 and 9-9. of Fig. 6; and

Fig. 10 is a detail elevation taken on the line ill-iii of Fig- 6.

For purposes of illustration, my invention is shown in connection with a press including an upright frame in the top of which in bearings I 5 is mounted a rotary shaft it carrying a drive wheel it which may be operated from any suitable source of power. By suitable transmission mechanism, power is taken from the rotary shaft for reciprocating the sliding element it in the cross head it which is mounted for reciprocation in the guides it on the standards 2 i, this arrangement being such that the sliding element is on each of its down strokes will give the cross head a positive down stroke or impulse. In the table 22, from which the standards rise, there is provided. a cup shaped die for receiving and retaining 1 plunger in the form of a cylindrical head 25 having a relatively long stem 26, that end of the stem opposite the head being provided with screw threads 21 whereby to secure the plunger in the sliding element I8. A hollow cylindrical die element 28, which surrounds the plunger for relative longitudinal sliding movement, slidably fits the circumference of the cylindrical head 25, and the end 28 of this element is provided in juxtaposition to the surface of the cylindrical head with an annular groove or recess 29. As illustrated in Figs. 2 and 3, the groove or recess 29 is open both at the end 28 and at the inner side thereof adjacent the periphery of the plunger. With respect to the plunger, the die element is normally maintained in an elevated position against a nut 30 on the screw-threaded region 21, by means of a spring 31 coiled around the plunger stem within the chamber 32. The upper end of this spring abuts a shoulder 33 while the lower end thereof abuts a washer 34 disposed on spacing pins 35 projecting upwardly from the plunger head 25. The die element 28 is connected with the cross head H! by means of a screw 36 or equivalent means so that the cross head and die element will reciprocate together; and as shown in Fig. 1, 'these parts are so arranged that the cross head will normally assume a position spaced a distance below the sliding element I8, thereby permittingv the latter to move the plunger downwardly a short distance before the die element is moved downwardly by reason of the engagement of the lower end of the sliding element with the upper end of the cross head.

The cylindrical head 25 of the plunger carries adjacent its lower end 31 a strike plate 38 of circular form, both the cylindrical head and the strike plate being of a diameter considerably less than the internal diameter of the cap closure blank 39, as shown in Fig. 2. The strike plate 38 is connected with the cylindrical head for relative movement with respect thereto, the mode of connecting these parts as illustrated in the drawing, consisting in providing the strike plate with rigidly engaged pins 40 which have sliding movement in bores 4| provided in the head in parallel relation to the axis thereof. The underneath face of the strike plate is shaped in conformity with the curvature of the crown 42 of the cap closure blank.

The cylindrical head of the plunger is provided with a diametrical slot 43 which is open at the opposite sides of the plunger head and as well at the free end 31 thereof. Mounted on a pivot pin 44 for up and down pivoting or swinging movement in the slot 43 are anvil members 45, the said pin 44 being secured in the cylindrical head at right angles to the axis thereof and extending across the slot 43. The anvils 45 engage and contact with the top surface of the strike plate 33 and the anvils are made with integral bills or projections 49, adjacent to which are straight edge portions 50 adapted to rest flat upon the top surface of the strike plate when the anvils and strike plate are in elevated position with the strike plate engaging the end 31 of the cylindrical head, as shown in Fig. 3. The anvils are so formed and arranged that when they are in elevated position as shown in Fig. 3 the bills will project radially from the opposite ends of the open slot 43 and with the points of the bills terminating in proximity to the inner face of the annular flange 39 of the cap closure blank and also at a point a short distance below the rim edge 39" of said flange; and further that when the anvils are in their lowered position, as shown in Fig. 2, the bills will be substantially within the outline of the aligned cylindrical surfaces of the plunger head and strike plate.

The anvils are normally urged by the springs 46 into that position in which the strike plate is extended below or in front of the end 31 of the plunger head. The plunger descends with the parts in this relationship and so enters the open end of the inverted cap closure blank. When the strike plate engages and contacts with the inner face of the crown 42 of the closure cap, the anvils are forced to move upwardly and they assume their determinate elevated position when the lower end of the cylindrical head impinges upon the strike plate. Substantially with the elevation of the anvils to their elevated position, the die element engages the free lower bottom or rim edge of the flange, inwardly upsetting the entire annular rim edge portion 39" thereof, which inwardly upset portion following the curved form 5| of the die assumes at the lower free rim edge or bottom of the flange, the form of an inwardly rounded rim edge 52 with its terminal or marginal interior rim edge portion rounded away inwardly from the surface plane of outstanding rim rotundity and then finally curved upon itself to complete or produce a curled head 53 adjacent the inner face of the flange 39. At the places where the bills 49 are located, instead of. producing the curled head 53 following the rounded rim 52, segments of the upset terminal portion are pressed into projecting lugs 54. When the bills' are in elevated position, top portions 55 thereof adjacent the points of the bills are inclined downwardly and inwardly toward the axis of the closure cap, so that the pressed lugs 54 are also given a downward inclination in conformity with the top portions 55. Owing to the points on the bills and to their location with respect to the inwardly upset terminal portion, the outermost rotundity of the transversely rounded rim 52 is followed by slight valleys 55 and then by secondary transverse curves 51 produced by pressing the material around the points of the bills and between the curved form 5| and the downwardly inclined top portions 55 of the bills. By this arrangement the lugs 54 merge at their bases with the inwardly rounded rim edge 52 and inwardly of the slight valleys 5.6, are in the form ofv secondary transverse curves, while their opposite proximate ends merge through curves 58 with the curled head 53.

As will be noted in Fig. 9, the end of the curled bead 53 does not engage and contact with the employed to produce additional lugs.

spersed or incorporated in the bead, provision is made for an inter-communication of resiliency between the projecting lugs and the bead. One advantage of this is that in applying a closure cap made in accordance with my invention to the spirally inclined threads of a jar or bottle, the projecting lugs which engage angularly against the underside of the bottle threads and the resilient bead which engages circumferentially with the bottle threads; afford an intercommunicating resiliency which permits an easy, smooth and progressive tightening of the cap as it is applied to the bottle. Another advantage is that when the cap is tightened upon the bottle, a firm binding and sealing-effect is obtained. It will also be recognized by the same tokens that in reversely turning the cap for removing it from the bottle, there will be a similar easy and smooth releasing engagement. A further advantage of my invention is to be found in the fact that the inside bead with its interspersed lugs is produced without marring or deforming the outer face of the flange in any way. The plain, unobstructed, outer face of the fiangemay be used to display printed instructions, legends, advertisements, and the like.

From the foregoing description, it will be recognized that with each down movement of the plunger and die member, a cap closure blank will be operated upon to form on the annular flange thereof. an inside bead and lugs for resiliently engaging the spirally disposed threads of a jar or bottle. It will be realized that the inwardly rounded rim edge affords the base both for the bead and the interspersed projecting lugs, and that the thin pressed resilient lugs will not yield too readily or greatly, since the less resilient bead acts as a restraining force, progressively limiting the yielding of the lugs.

' The number of lugs produced on the bead depends upon the number of anvils employed. In the present embodiment I have shown two anvils to make two lugs, but additional anvils may be In some instances, only one lug is required on the cap, in which event only one anvil will be employed.

The apparatus of my invention is capable of rapid operation, in fact it will accurately produce the beads and lugs just as rapidly as the blanks can be fed to the retaining die for the operation and then expelled after the operation. The caps may be fed one after another to the retaining die by means of a chute or a conveyor. Whereas, in the present embodiment, I have illustrated the plunger and die element mounted for reciprocation in a vertical direction, such position is not necessary, as these parts will function in the same manner to produce. the same results when inclined in any direction or even when inverted. The particular manner in which these parts are mounted for operation may depend upon the nature and character of the automatic devices for feeding the blanks, for retaining them while being operated upon, and finally for ejecting them after the beads and lugs have been produced.

As many changes could be made in the above described construction, and many apparently widely different embodiments of this invention could be made without departing from the scope thereof; it is intended thatall matter contained in the above description or shown in the accompanying drawing should be interpreted as illustrative and not in a limiting sense.

and not of limitation, and I have no intention, in the use of such terms and'expressions, of excluding any equivalents of the features shown and described or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

I claim:-

1. The method of forming an interior bead and a projecting thread-engaging lug on a cap closure flange, which consists in bending the rim portion of the flange inwardly into the interior of the closure in proximity to the inner face of the flange, continuing the bending of the inbent portion until it assumes the form of a curled bead, and while continuing the bending applying a retarding force to a segment of the inbent portion by means at the underside thereof to give the retarded segment the form of a resilient threadengaging lug incorporated in the bead.

2. In the art of bottle cap manufacture, means for inbending the circumferential rim portion of the cap flange into an inner projecting portion surrounded by the flange, and means comprising differently shaped and simultaneously effective parts for pressing and shaping the inner projecting portion into a rolled bead lying adjacent the flange and a thin inwardly projecting segment merging with said bead and which presents a thread engaging surface.

3. The method of fabricating a screw type cap closure having an annular flange projecting from its crown and an interior bead embodying thin free-edged lugs inclined toward the crown, which consists in uniformly bending an annular portion of the flange bodily inwardly while maintaining a pressure for shaping such portion into a bead curled upon itself at the inner face of the flange, concurrently interrupting the shaping int-o curled bead form, of relatively small segments and in pressing the segments into relatively thin resilient projecting lugs having free edges.

4. The method of producing a thread-engaging lug on the metallic annular flange of a cap closure, which consists in inwardly inbending, without deforming the outer face of the flange, the rim portion of the flange, maintaining a pressure for curling the rim portion upon itself to produce a-resilient open bead at the inside face of the flange, and concurrently pressing a segment of the inwardly bent rim portion to produce a resilient projecting lug having communicating resiliency with the curled bead at either side thereof.

5. In apparatus of the character described, means for retaining a cap closure having an annular flange, a movable die member for inwardly bending the rim portion of the annular flange and shaped to form the inbent portion into a bead lying adjacent the inner face of the flange, an anvil movable within the outline of the flange into a position to be engaged by a segment of the rim portion, said die member having cooperation with the anvil concurrently with the shaping of the bead to press the segment into a projecting lug the proximate ends of which are integrally connected with the bead.

6. In an apparatus of the character described, means for retaining a capclosure having an annular flange, a movable die member having a groove for inwardly bending the rim portion of the annular flange to produce on the flange an inwardly rounded rim edge, said groove being shaped to press the inwardly bent material following the rounded rim edge into a bead of the desired configuration, an anvil within the outline of the flange for engaging a segment of the inwardly bent material at a point beyond the rounded rim edge, said groove cooperating with the anvil to press the engaged segment into a projecting lug beginning at the proximate termination of the rounded rim edge and ending in a free edge.

'7. Apparatus of the character described comprising a movable die member for inwardly upsetting the rim portion'of an annular flange to form a curled interior bead, a plunger movable in the die member and carrying in advance thereof a relatively movable strike plate adapted to enter the space defined by the flange, anvil members movable to effective position by the strike plate and adapted, in their effective position, to be engaged by the rim portion being upset for pressing out concurrently with the formation of the interior bead thread engaging lugs which merge with said bead, said anvils cooperating with said die, and the last-mentioned being effective to press the lugs into convexly rounded shape upon the anvils.

8. Apparatus of the character described comprising means for retaining a cap closure at a fixed location, a reciprocating die member adapted, on its advancing stroke, to bend the rim portion of the closure inwardly and form an interior head, a reciprocating plunger in the die member adapted to enter the open end of the closure so as to be surrounded by the flange thereof, a relatively movable strike plate carried by the plunger to enter the closure in advance of the plunger and strike the crown of the closure, and movable anvil members operated by the strike plate and adapted, in their operative position, to be engaged by the rim portion which is being bent into a bead, said anvils being shaped to press the engaged portions into thread-engaging lugs integrally connected with the interior bead.

9. In an apparatus of the character described, means for retaining a cap closure having an annular flange, a movable die member having a groove for inwardly bending the rim portion of the annular flange to produce on the flange an annular inwardly rounded rim edge, said groove being shaped to press the inwardly bent material following the rounded rim edge into a bead of the desired configuration, an anvil operative within the outline of the flange and radially with respect thereto for engaging a segment of the inwardly bent material and having a' shaping bill and surface, said bill being engageable with the segment at a point beyond the rounded rim edge, and said groove having cooperation with the shaping bill and surface to press the engaged segment into a lug projecting radially inwardly on a slope toward the axis of the cap and terminating in a free edge.

10. In an apparatus of the character described,

a plunger having a relatively movable strike plate, both insertable within the annular flange of a cap closure, a die member relatively movable on the plunger for inwardly bending the rim portion of the flange and shaped to form the inwardly bent portion into a bead of desired configuration, and means movable by the plate for engaging and forming into a projecting lug a segment of the portion being inwardly formed, said means and ie member cooperating to press the projecting lug into desired form concurrently with the formation of the bead. i

11. In an apparatus of the character described, a plunger, a strike plate connected with the plunger for movement toward the end of the same, both the plate and plunger end being of a size to enter the space defined by the annular flange of a cap closure, 9. die member on the plunger and having a groove for receiving the annular flange, said groove being formed to upset the rim portion of the flange inwardly and to press the upset portion into a bead of desired configuration, pivoted radial anvils on the plunger arranged to be moved by the plate into a protruding position for engaging segments of the upset portion, said anvils cooperating with said groove for pressing'the engaged segments into projecting lugs concurrently with the forming of the bead.

12. An apparatus of the character described comprising a plunger having a cylindrical head, a strike plate in spaced alignment with the head and connected with the head to move toward the free end of the same, a die member movable in its axial direction longitudinally of the plunger to advance beyond the free end of the head toward the strike plate and having an annular groove, and a pivoted member provided with a bill between said plate and head to be engaged and moved by said plate so as to enter the bill in said groove when the die member is actuated.

13. An apparatus of the character described comprising in combination with a plunger having a cylindrical head, a cylindrical die member on the head having an annular groove adjacent the surface thereof, anvil members pivoted in radial grooves in said head to move from a position in front of the free end of the head to a position in which they project beyond the circumference of the head for entering said groove, and means comprising a strike plate carried by pins slidable in the head for moving said anvil members.

14. An apparatus of the character described comprising in combination with a plunger having a cylindrical head, a cylindrical die member on the head having an annular groove adjacent the surface thereof, anvil members pivoted in radial grooves in said head to move from a position in front of the free end of the head to a position in which they project beyond the circumference of the head to enter said groove, means carried by the head for moving said anvil memmovement of the strike plate and movement of the anvil members themselves to their front position.

15. In an apparatus for operating on a closure cap to form on the flange thereof an internal bead and a thread-engaging lug, a plunger having a relatively movable strike plate adapted to enter the cap and strike the crown thereof, a pivoted member movable in a slot in the plunger, said member having an anvil portion and being movable by the strike plate to project its anvil portion beyond the outline of the plunger to lie in juxtaposition to the inner face of the flange when the strike plate engages the crown, .and a movable die member on the plunger provided with a groove for receiving the flange, said groove being shaped to upset the rim portion of theflange inwardly upon the anvil-portion and to press the same thereon to form a thread engaging lug while concurrently forming a bead at the opposite side of the lug.

16. The method of fabricating a thread-engaging type of cap closure having a cylindrical flange with a bottom rim edge of uniform extent from the crown of the closure, which consists in bending under die control, without altering the outer face of the flange, a uniform amount of the bottom rim edge to produce a transversely rounded inwardly directed rim edge portion and also a marginal interior portion, both extending circumferentially around the flange and the marginal interior portion terminating above the plane of the lowermost surface of the transversely rounded rim edge portion, and in bending under die control the' marginal interior portion into beads and lugs alternating in the circumferential direction of the flange, the beads being curled outwardly toward the inner face of the flange in substantially symmetrical rounded relation with the transversely rounded rim .edge portion and the lugs being bent in an inward direction and shaped into efiective thread-engaging form.

17. In a method of forming the rim portion of a cap closure into a curled bead and locking lug, the steps which consist in forming the rim portion of the closure into a curl by a plunger die provided with a transverse concavity acting upon one face of the rim portion, and subjecting one segment of the rim portion to a lug shaping operation between one segment of the concavity and an anvil provided with a facing of a size and shape to produce the desired lug, the forming of the bead and lug being concurrent, by forcing said anvil toward the plunger during the active movement of the'latter and into said concavity from a lateral position opposite to the direction of the curling, thus shaping between the concavity and anvil a locking lug extending opposite to the direction in which the curl of the bead terminates.

18. In a method of forming curled beads and locking lugs on the flange of a cap closure, the steps which consist in bending a uniform edge portion of the flange inwardly around the circumference thereof and into transversely curved form by a plunger die with a transversely concave recess acting upon the edge portion and subjecting the portion being inwardly curved to curling by the concave recess acting on one face thereof while at spaced points segments of the portions being inwardly curled are subjected to lug shaping operation between spaced segments of the concave recess and anvils provided withfacings of a size and shape to produce the desired lugs, the forming of the alternating curled beads and lugs being concurrent, by forcing said anvils at the same time toward the plunger during the active movement of the latter and into said concave recess from positions inwardly of the line of movement of the die member, thus shaping in alternating relation with the curled beads and between the concave recess and the anvils locking lugs extending opposite to the direction in which the curls of the beads terminate.

19. The method of forming an interior locking projection on a cap closure flange of cylindrical form, which consists in subjecting a uniform portion of the entire circumferential lower edge of the flange to inward bending and curling pressure so as to produce an inwardly curled supporttained which has its base and ends integral with. the supporting bead.

20. The method of forming interior locking projections on a cap closure'flange of cylindrical. form, which consists in convexly curling inwardly a uniform portion ofthe entire circumferential lower edge of the flange to produce inwardly of the flange a convexly curled supporting base having beyond it a continuous marginal section, continuing to curl the marginal section to complete a curled bead around the entire inner periphery of the flange, and while continuing the curling to complete the curled bead, subjecting segments of the marginal section at spaced points to bending and shaping pressure until such segments assume between the adjacent sections of the curled bead, the form of locking projections which project inwardly beyond the adjacent segments of the curled bead.

21. The method of forming interior beads and locking projections on a cap closure flangeof cylindrical form, which consists in forming a convexly rounded supporting rim edge inwardly around the entire circumferential lower edge of the flange by subjecting a uniform portion of the lower circumferential edge of the flange to bending and curling pressure until the desired convexly rounded conformation is obtained, then subjecting definite segments of substantially the innermost portion of the supporting rim edge to curling pressure until substantially tubular bead portions are obtained at the inner surface of the flange, and subjecting other segments of substantially the innermost portion of the supporting rim edge to bending pressure until locking projections of the desired shape and projection are obtained.

22. Apparatus of the kind described, having, in

combination, a movable die member and a movable anvil member, the die member being shaped for inwardly upsetting the entire cylindrical edge portion of a cylindrical flange to form a curled bead with a substantially constant cross sectional curve around the entire inner periphery of the flange, the die member and anvil member having arrangement and operation so that as the.

' curled bead is produced by the die member the anvil member will cooperate with the die member to press out and shape from a segment of the material being upset, a locking projection which is supported by the curled bead, and said anvil member being effective to dispose the locking projection in a position in which it projects inwardly beyond the curving surface of the adjacent segments of the curled bead. I

23. The method of forming metal closures which comprises shaping a blank into a completed lug cap in a single stroke of a die, by engaging the raw edge of the blank skirt and bending inwardly the skirt throughout the entire circumference thereof, and while the skirt is being bent inwardly exerting an opposing force upon the inbending metal at spaced points to shape the metal into container engaging lugs.

24=. The method of forming metal closures which comprises shaping a blank into a completed lug cap in a single stroke of a die,'by engaging the raw edge of the blank skirt and curling inwardly the skirt throughout the entire circumference thereof, and while the skirt is being curled inwardly exerting an opposing force upon the incurling metal at spaced points to shape the metal into container engaging lugs.

25. The method of forming metal closures which comprises shaping a blank into a completed lug cap in a single stroke of a die, by engaging the raw edge of the blank skirt and curling inwardly the skirt throughout the entire circumference thereof, and while the skirt is being curled inwardly engaging spaced portions thereof by members which shape such portions of incurling metal into container engaging lugs.

26. The method of forming metal closures which includes engaging the raw edge of the blank skirt with a die to curl the skirt inwardly, and after the skirt has been curled a sumcient extent to give the particular lugs desired, engaging spaced portions thereof by members which shape the metal into container engaging lugs, the remaining portions continuing curling to form a bead by the continued movement of said die.

27. In a method of forming a metal closure, the steps which comprise shaping a blank into a cap in a single stroke of a die; by engaging the raw edge of the blank skirt and bending inwardly the skirt throughout the entire circumference thereof to form a circumferential bent in portion, and forming container engaging lugs from the bent in portion during said die stroke.

28. In a method of forming a metal closure, the steps which comprise subjecting a blank to a stroke of a die, to bend inward the blank skirt throughout the entire circumference thereof to form a circumferential bent in portion, and forming container engaging lugs from the bent in portion during said die stroke.

29. In a method of forming a metal closure, the steps which comprise curling inwardly the blank skirt throughout the entire circumference thereof to form a circumferential bent in portion, and after the metal has been curled inwardly to the desired extent, engaging spaced portions thereof simultaneously by a plurality of members which shape the incurled metal into container engaging lugs, and thereafter simultaneously withdrawing said members.

30. The method of making a closure cap from a blank having a top and a substantially cylindrical flange terminating in a free edge, which comprises the steps of curling the free edge of the flange radially inwardly to form a bead, partially uncurling circumferentially spaced portions of the bead, and thereby projecting the relatively uncurled portions radially inwardly beyond the adjacent curled bead portions to form locking lugs for said closure cap.

31. The method of making a closure cap from a blank having a top and a substantially cylindrical flange terminating in a free edge, which comprises the steps of curling the free edge of the flange radially inwardly to form a bead, partially uncurling circumferentially spaced portions of the bead, while maintaining other portions in their curled condition", and thereby projecting the relatively uncurled portions radially inwardly beyond the adjacent curled bead portions to form locking lugs for said closure cap.

WILLIAM MARTIN VOGEL.

DISCLAIMER 2,064,770.William Maa tin Vogel, Glen Ridge, N. J. METHOD-AND APPARATUS FOR MANUFACTURING BOTTLE CAPS. Patent dated December 15, 1936.

Disclaimer filed January 6, 1942, by the inventor. Hereby enters this disclaimer to claims 1, 4, 5, 6, 16, 19, 20, 21, 22, 29, 30, and 31 of said Letters Patent.

[Ojficial Gazette February 10, 1942.]

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