US3195426A - Method of attaching a rim to a cylinder - Google Patents

Description

July 20, 1965 c. ER 3,195,426

METHOD OF ATTACHING A RIM TO A CYLINDER Filed Feb. 25, 1963 5 Sheets -Sheet l IN V EN TOR.

A TTOKNEYZF' July 20, 1965 IN VEN TOR. 60mm 6. Bean? 19 TTORNEKS' G. C. BAUER 5 SheetsSheet 3 INVENTOR. RHLO 6. Sm/5R BY July 20, 1965 I METHOD OF ATTACHING A RIM TO A CYLINDER Filed Feb. 25, 1965 July 20, 1965 e. c. BAUER METHOD OF ATTACHING A RIM TO A CYLINDER Filed Feb. 25, 1963 5 Sheets-She et 4 Mam WW; W k C a w W WA July 20, 1965 G. c. BAUER METHOD OF ATTAGHING A RIM TO A CYLINDER Sheets-Sheet 5 INVENTOR. 05mm 0 BAUER III'IIIII! Filed Feb. 25, 1963 United States Patent 3,195,426 METHOD GE ATTACHING A. RIM T A CYLINDER Gerald C. Bauer, Portage Township, Kalamazoo County,

Mich, assignor to Ceilu-Kote, Inc, Schoolcraft, Mich a corporation of Michigan Filed Feb. 25, 1963, Ser. No. 261,941 Claims. (Cl. 93-39.1)

This application is a continuation-in-part of my application Serial No. 177,006, filed March 2, 1962, now abandoned.

This invention relates to container structures and methods of making same and it relates more particularly to the interlocking of one end of a fibrous, as paper, cylindrical container with a metallic container end.

The broad concept of making the sides of a container from a fibrous material, such as paper, and the end of the container from metal is very old and a multitude of methods have been suggested for assembling such sides and ends together. Some of these have involved spinning procedures and others have involved the use of dies which move in a direction parallel with the axis of the container. However, the procedures thus far developed have not, insofar as I am aware, provided a simple mechanism capable of use under field conditions and capable of use where the container sides are made of relatively light gauge material.

In the present instance, the invention has been developed for the specific purpose of providing containers for the handling and transporting of frozen foods, grease compositions and, in appropriate cases, asphalt. Such containers are of relatively large size and must have a high degree of strength. Further, the conditions under which material is prepared and introduced into the containers are such that the containers are preferably delivered to the point of assembly and filling in a flat condition. The containers are erected, assembled and filled at such point, necessarily under field conditions. Thus, the mechanism by which such assembly is carried out must be relatively simple, capable of easy transportation and operable Without precise control of the mechanical operations involved. This rules out many assembly methods, such as spinning methods, which are well adapted only for use under closely controlled conditions, such as in a factory.

A further problem with certain structures of the prior art is that the metallic parts used for the ends of the containers have upstanding rims of one sort or another. These rims are often flared outwardly slightly either to enable them to nest better with each other or to enable a rolling or spinning operation to be started more easily than would be the case if they extended substantially perpendicularly to the plane of the end wall of the container. However, while this type of structure is convenient as far as minimizing the space required for transporting such ends is concerned, the ends often adhere together with such force that it is extremely difficult to separate them for use, particularly where such separation is done by hand under field assembly conditions. In some cases it has been impossible to separate the ends from each other without inflicting such damage to one or more of them as to render them unfit for use. Such separation, at the least, is inconvenient and time consuming and, in many cases, results in a substantial loss due to damaged parts.

Further, after the containers are filled they often are moved by rolling same on their lower edges. Accordingly, it is desirable that the assembly method, and resulting product, be such that a metallic rim is provided along the lower edge of the container so that such rolling can be carried out with a minimum of effort on the part of the workman and at the same time with a minimum likeli- 3,195,426 Patented July 20, 1965 hood of damage to the container. It is further desirable that such assembly method, and resulting product, although designed primarily for the assembly of the side of the container to the bottom thereof, also be readily adaptable by only simple modifications to the application of a metallic top to the container.

While the packaging of frozen foods, etc. under field conditions has been set forth above as illustrating the specific need out of which the present invention arose, it will be recognized that such specific example is for illustrative purposes only and that the container structure and assembly procedure of the present invention can be used advantageously for a wide variety of purposes.

Accordingly, the major objects of the invention include the following:

(1) To provide a method for assembling a container, in which a cylinder of fibrous material which constitutes the sides of the container is assembled with a metallic end.

(2) To provide a method for assembling the container, as aforesaid, in which the said sides and end of the container are rolled together into an intimate and leak-proof relationship with each other.

(3) To provide a method for assembling a container, as aforesaid, whereby the container can be assembled from parts which are shipped in flat condition.

(4) To provide a method for assembling a container, as aforesaid, in which the blank from which the end of the container is formed can be made without a flared rim so that it will not nest appreciably when stacked with similar ends and will, accordingly, not adhere to other ends when it is being separated for use.

(5) To provide a method for assembling a container, as aforesaid, which can be effectively performed under field conditions by readily portable equipment.

(6) To provide a method for assembling a container, as aforesaid, which provides a metal rim along an end edge of the container whereby the container may be rolled on same with a minimum likelihood that damage to the container will result therefrom.

(7) To provide a method for assembling a container, as aforesaid, which can by only slight modifications also be made applicable to applying covers to the container.

Other objects and purposes of the invention will be apparent to persons acquainted with devices of this general sort upon reading the following specification and inspecting the accompanying drawings.

In the drawings:

FIGURE 1 is an elevational view, partially broken away, of the bottom portion of a container construction in accordance with the invention, said container being shown in an inverted position.

FIGURE 2 is an enlarged, fragmentary, sectional view of the parts which are to be assembled to form a container, together with the important working parts of the assembly apparatus, the same being in a position immediately prior to the actual assembly procedure.

FIGURE 2a is a fragmentary, sectional view through the edge portion of the closure member as manufactured and before being assembled to the container side wall.

FIGURE 3 is a view similar to FIGURE 2 showing the parts immediately after the commencement of the assembly procedure.

FIGURE 4 is a view similar to FIGURE 2 showing the parts at a later time in the assembly procedure.

FIGURE 5 is a view similar to FIGURE 2 showing the parts substantially at the end of the assembly procedure.

FIGURE 6 is a view similar to a fragment of FIGURE 5 and showing a further step of the assembly procedure.

FIGURE 7 is a fragmentary, sectional view of an assembled container showing one kind of top which can be used therewith.

FIGURE 8 is a view similar to FIGURE 7 showing another kind of top.

FIGURE 9 is a view similar to FIGURE 7 showing 3 showing I FIGURE 14 is a View similar to FIGURE 11 showing I the parts substantially at the'end of the assembly procedure. V V

FIGURE 15 is an enlarged, fragmentary sectional view,

generally similar to FIGURE 10, of an alternate rim construction for the top of a container together with some of the important parts of analternate assembly apparatus said closure member may be telescoped into the cylinder as shown in FIGURE 2. It may be pushed down as far as possible so that, as indicated at 14 in FIGURE 2., the upper. end of the cylinder 1 is turned slightly out wardly thereby. However, it is not essential that the closure member .2 be moved so far downwardly within 7 the cylinder 1 that the turned-out portion 14 be formed.

In some cases, it may be preferable to telescope the closure member 2 inside the'cylinder'l only so far that the upper edge of said cylinder is directly opposite the end of tip section II.

' A'base mandrel 16 is provided in a known manner to engage the base Wall 17 of the closure 2 and a clamp 18 V V .is' also provided in, a known manner to engage the upper surface of said base wall whereby said base wall is firmly gripped between said mandrel and said clamp. The outside diameter of said cla-mp'18'is only a small clearance distance less than the inside diameter of the base portion 7 so that said clamp may slip easily but construction, the, same being in'a position immediately 7 prior to the actual assembly procedure.

.FIGURE..16 is a view similar to FIGURE 15 showing the parts substantially at the end of the assembly procedure. In carrying out the objects and purposes above set forth, I have provided a container comprised of a cylinder 1 of fibrous material, such as paper, and a metallic closure member 2 which closes one end of said cylinder and which is connected to said cylinder by an interlock structure 3. The container is shown in an inverted position which is the normal positionfor assembly;

The cylinder 1 may be made of any convenient fibrous material, of any desired type or thickness, so long as the end portionthereof is capable of being. tightly curled upon itself as described in detail hereinbelow. For example, in one typical embodiment of the invention the cylinder 1 is made'of kraft paper approximately .031

inch thick. i V

The closure member 2 is made of any convenient metal,

such as aluminum or steel, and the initial shape of the closure member is shown in FIGURES 2 and 2a. The closure member 2 is comprised of a base wall 17 and an snugly into clamping position'on said base wall 17.

An annular rolling 'die19 encircles clamp'lS. The clamp 18 ismovable axially with respect to the mandrel 16 in any convenient manner'byany suitable means, not shown, and the annular rolling die 19 is likewise reciprocable with respect tothe mandrel 16 and the clamp "18 by any convenient means, also n'ot shown, as indicated by the arrows 21. Suitable means for reciprocating clamp 18 and die 19 are well known and understood by those skilled in the art and hence are not shown here.

Turning now to a more detailed examination of the annular rolling die 19, said die has an axial end face which is shaped so as to have a radially inner surface 22, a

radially outer surface 28 and a semicircular intermediate surface 23. The inner surface 22 is made as narrow as possible consistent with the strength of the material involved, the, width thereof in the particular embodiment here used to illustrate the invention, being of the order of 0.015 inch. What would otherwise be asharp corner at the:intersection of surface 22 and surface 23 is rounded slightly at 24. The surface. 23 is semicircular, the center thereof being indicated at 26 on the 'construction line27 extending between the surface '22 and the surface upstanding rim generally indicated at 6'. The upstanding rim 6 has a substantially cylindrical base portion :7 which extends substantially perpendicularly from the plane of the base wall 17. The rim 6 alsohas a prerolled edge portion 8. The edge portion -8 includes an arcuate intermediate section 9rwhich extends outwardly from the upper end of baseportion 7 and which is curved through i an arc of close to 180 so that its outer end is. opposed to and spaced laterally from said upper end of base portion 7. The edge portion 8 also includes an arcuate'tip section ll which extends from the outer end of section 9 back toward the base portion 7. The tip section; 11 is curved on a smallerradius than the portion 9'and is curved through an arc of slightly greaterv than 90.

Thus, a line 12 which istangent to the outer surface of.

tip portion 11 at the inner end thereof defines with the outer surface1 3 of the base portion 7 an included angle which is close to butwhich is less than The inner end of tip section 11 is sp ced from the surface 13 a distance 4 (FIGURE 2a) which is approximately twice the wall thickness of the cylinder 1. In the'embodim ent here chosen for illustration, the'distance d is. equal to 0.068 inch, the radius of curvature ofthe external surface of intermediate section ,9 is about, .093inch"andthe' base portion 7. of the a 28. The diameter of the semicircular surface 23 is great-' or than the distanceX (FIGURE 2) in order to enable the portion 9 to move along thesurface-ZS in a rolling manner when the edge 22, as hereinafter further described, moves axially between the upstanding base portion 7 and the clamp l In the present embodiment, the diameter of surface 23. is approximately .187 inch. Thesurface 28'is' "not critical and may be chosen as convenient to provide suflicient over-all strength, for the annular-die 19.

, Operation The importance of the above-described dimensional relationships further appears upon a tracing of the actions which take place during assembly of the cylinder 1 with the closure 2.

FIGURE 2 has already been above described and it shows the initial positioning of the cylinder 1, the closure member 2, themandrel 16, the clamp 18 and the die 19. The die 19 is movedtoward the closure member 2, normally downwardly as the parts are" usually arranged and as shown in the drawings,.and it presently occupies the position shown in FIGURE 3. Here the surface 22 has entered between the base portion 7 and, the outer surface ofthe' clampi18 and this tilts the upper end of cylinder 1 and the base portion 7 radially outwardly. This outward tilting is further assisted by therounded edge 24 on the die 19. At this point the upper edge 14 of the cylinder 1 and the rim 6 of the closure member 2 have not changed their shape appreciably.

" As the ,die19 is continued to be moved downwardly, it reaches a position'as shown in FIGURE 4 wherein its edge 22 has moved a substantial distance between the upstanding base portion 7 and the outer Surface of the clamp 18. The upper part of port-ion 7 and the radially inner part of intermediate section 9 engage the surface 23 and are bent to conform to the radius of curvature of said surface 23.

As the die 19 moves from the FIGURE 3 to the FIG- URE 4 position the upper end of the cylinder is caused to coil upon itself by the action of the intermediate section 9 and the upper part of portion 7 thereon as they are bent by engagement with surface 23. The resistance of the cylinder 1 to such coiling urges the upper part of portion 7 and the radially inner part of said intermediate section 9 into engagement with the surface 23. Thus, as the parts are moved from their FIGURE 3 to their FIGURE 4 positions, the upper part of portion 7 and the radially inner part of intermediate section 9 will slide along the surface 23 and will be deformed thereby by a die-shaping type of action. At the same time the radially outer part of section 9 is turned back toward the cylinder 1 and the tip portion 11 is moved upwardly through an arc and is disposed, as shown in FIGURE 4, between opposing surfaces of the cylinder 1.

The die 19 continues downwardly until it reaches the position shown in FIGURE 5 wherein the assembly operation is shown as being substantially completed. In this position, the surface 22 is moved to or slightly beyond the bottom of the clamp 18. In so moving, the surface 23 bends the lowermost part of the base portion 7 outwardly and downwardly to form the bulge shown at 29 in FIGURE 5. The remainder of the base portion 7 engages and conforms to the shape of surface 23. During this final motion of the die 19, the intermediate section 9, the tip portion 11 and the upper portion of the cylinder 1 are further rolled and coiled together to form the rigid interlock 3.

If desired, a final and further tightening of the relationship between the upstanding base portion 7 and the adjacent portion of the cylinder 1 may be provided as shown in FIGURE 6 by effecting a slight but still further downward movement of the die 19 by which the surface 22 provides a substantial downward bulge indicated at 29a. This effects a compression of the wall of the cylinder 1 and increases the effectiveness of the interlock.

Thus, in the finished container structure the closure member 2 is rigidly interlocked with the end of the cylinder 1. The rim portion 6 and the end portion of the cylinder 1 therewithin are coiled upon themselves so as to have a substantially spiral configuration and, as will be apparent from FIGURE 5, such spiral has at least one full turn. Indeed the rim 6 has approximately one and one-half turns. The portion 7 in the finished product defines a first, substantially semicircular portion, the section 9 defines a second, substantially semicircular portion which is curved back toward the cylinder 1 and which is curved on a radius of curvature less than the radius of curvature of portion 7 and the tip section 11 is curved through an arc of more than 90 away from the cylinder 1 and on a radius of curvature less than the curvature of intermediate section 9. The end portion of the cylinder 1 is similarly curved and substantially completely fills the rim portion 6.

Modification The foregoing described parts contemplate the assembly of a single, one-piece, closure member with the cylinder 1 and said closure member normally is the bottom of a container. The same technique may be used in various ways, three of which are illustrated in FIGURES 7, 8 and 9, for assembling the top of the container.

In FIGURE 7 the parts 7a, 9a and 11a of a cover mounting ring 31 are identical with the corresponding parts 7, 9 and 11 abovedescribed. The only difference is that instead of there being a solid base wall 17 filling the zone within said ring 31, the part 17:: is reversely curved and has a downwardly extending flange 3d which firmly seats against the cylinder 1. The part 17:: provides a flange for the support of the cover member 32. Said cover member 32 has a central portion 33, an upstanding rim 34 and a rolled upper edge 36. Said upstanding rim 34 and the rolled upper rim 36 may be made in any convenient manner including, if desired, the technique above described in connection with rolling the upper edge of the closure member 2.

In FIGURE 8, the parts 7b, 9b and 11b of the rim 37 again are identical with the corresponding parts 7, 9 and 11 above described. I-Iere, however, the inner portion of the part 7b is rolled as indicated at 38 to provide a rim upon which to receive the cover. The cover may be of the form shown at 32 in FIGURE 7 or of the form shown at 39 in FIGURE 8. Referring to cover 39, the upstanding flange 41, corresponding to the flange 34 in FIGURE 7, is rolled inwardly at 42 as shown in order to cooperate with the lower end of a container made as shown in FIG- URE 1 for stacking purposes. A reinforcing rib 43 may be provided in the cover 39 if desired.

In FIGURE 9 the parts 7c, 9c and 11c of the rim 46 are identical with the corresponding parts 7, 9 and 11 above described. The rim 46 has an intermediate flat wall portion 47 and a rolled, inner edge portion 48. The cover 51 includes a rolled edge portion 52 whose uppermost point is offset upwardly a small distance, e.g., .125 inch, from the uppermost point on the rim 46. The cover 51 has a planar wall portion 53 which is of substantially the ame width as the diameter of the edge portion 48 and which rests thereon. The cover also has a second wall portion 54 which extends at an angle of slightly greater than to the wall portion 53 so that it tapers slightly toward the opposite end thereof. The wall portion 54 is received within the rolled edge 52 and snugly engages same. As a result of such engagement an intermediate part of the wall portion 54 is bulged inwardly as indicated at 56 so that the cover 51 is securely but releasably engaged by the rim 46. The cover 51 has a central wall portion 57 which closes off one end of the cylinder 1. The rolled edge portion 52 of the cover 51 is positioned so that another container can be stacked thereon, the other container being indicated at E in FIGURE 9.

In FIGURE 10 is shown a modification of the assembly apparatus wherein the mandrel 16 and the clamp 18 have axially aligned, annular grooves 61 and 62 on the opposite faces thereof adjacent the peripheries thereof, which grooves are substantially semicircular in cross section. When the mandrel 16 and the plunger 18 are adjacent each other, the grooves 61 and 62 mate and almost completely encircle the rolled edge portion 48 of the rim 46 while the die 19 is being moved to effect interlocking of the cylinder 1 and the remainder of said rim. This insures that the inside diameter of the rim 46 is uniform so that the cover 51 can snugly engage same and effectively close off the end of the cylinder.

Alternate structure for container bottom Referring to FIGURE 11, a fragment of an alternate container bottom closure member 1132 is shown partially inserted into the open bottom end .of but not yet attached to an inverted container cylinder 101 which for purposes of illustration may be considered essentially similar to the cylinder 1 of FIGURES 1 and 2. The closure member 192 may be of the same material as the closure member 2 of FIGURE 1.- The closure memher 192 has a base wall 117 and a rim portion 106 having a cylindrical base portion 107 extending essentially perpendicularly upwardly from a bend 138 in the base wall 117 to a prerolled edge portion 168. The prerolled edge portion 198 extends outwardly through an angle of approximately 90 and at an exterior radius corresponding to that of the concave surface of an annular rolling die 119, said annular rolling die being in the embodiment illustrated identical to the die 9 of FIGURE 2. Because of the identical construction of said dies,

the same reference numerals with the suflix a added a dimensions will be understood to be illustrative only and not limiting.

As the annular rolling die 119 continues moving downwardly from its position .of FIGURE 12, it exerts an essentially continuous downward. force'on the edge portion 108 and the base portion 107 whereby the material I of the base wall 117 radially-outward of the bend 139 as grindingwhereby the minimum thickness of the wall between the annular groove 131 and the radially outer surface of the base mandrel 116 is increased sufliciently that breakdown of said wall during normal usage will 9 not occur.

In the embodiment here chosen for illustration, said minimum Width of the wall is approximately.

.010 inch whereby the distance'between the upper sur.

face of said wall and the upper surface of the mandrel 116 is approximately .028 inch. A clamp mandrel 118 is received through the rim'6 andrests upon thebase wall 117 of the closure member 102.. The lower radial surface of the clamp mandrel 1 18 has an annular hemicircular groove 136 out therein adjacent the peripheral wall thereof. The radially outer wall of the groove 136 is reduced in axial'extent as shown at 137 by any convenient means such as grinding so that the minimum thickness of the -material between the groove 136 and the outer surface of the peripheral wall of the clamp is moved essentially downwardly into conformity with the-surface of the groove 131 (FIGURE 13) whereby an annular groove- 141 is formed in the base wall 117. During this process, somerelative movement takes place between the stationary cylinder 101 and the downwardly moving base portion 107, which relative motion ceases when the material of the base wall .117 radially outward.

.of th e bend 139 conforms to the surface of the groove 131. Simultaneously with or shortly after the reshaping of the base'wall 1.17 as hereinabove described, continued downward movement of the rolling die. 119 causes rela- I into'its position of FIGURE 13.

tive movement between the. rolling surface 23a of said die and the surface of the rim106 whereby said rim is rolled Shortly after rolling of said rim commences. the rolling die .119 willmove downwardlypast the level of the end 114- of the cylinder 101 whereby the w'allo-f said cylinder will be rolled with the rim 106 into its position of FIG- URE 13.

into the outside surface of the wall of the cylinder 101 g and to become interlocked therewith. Thus, continued mandrel 118 is increasedto minimize breakdown there of. Said minimum thickness may be approximately .010 inch and the distance between the radially'outer termination of groove 136 and the upper face .of the base wall 117 is approximately .028 inch. The clamp mandrel 118 is of lesser radius than is the base mandrel 116 by at least the thickness of the cylindrical base portion 107. The radius of curvature of the annular groove 136 is less than that of the annular groove 131 whereby the radially inner edge of the groove 136 liesra-dially outdownward movement of the rolling die 1-19 from its position .ofuFIGURE 13 will tend to make the end 112,

become even more securely interlocked in the material of the wall of the cylinder 101. As the rolling die 119 reaches'its lowermost position (FIGURE 14), the upper part of the base portion 107 and the edge portion 108 are tightly wound around the upper portion ofthe wall of .the cylinder 101 producing compressive forces of wardly of the radially inner edge of the groove 131.

' Using for example only and not intending limitati-On a closure member 102 having a wall thickness of approximately .015 inch and a cylinder'101' having a'wall thickness of approximately .045 inch, a rolling'die having a rolling surface radius of approximately .094 inch radius may be used. Satisfactory radii for the grooves 136 and 131 have been found to be approximately .078 inch and .090 inch respectively.

Operation of alternate structure Assuming the closure member 102 to be inserted in the" ward movement of the rolling die119 causes the pre-' rolled edge portion 108 and cylindrical base portion 107 of the closure member 102 to move downwardly there with whereby the bend 138 joining the base wall 117 with the base portion 107 movesdownwardly to contact the surface of the annular groove 131 near the radially outer extremity thereof. Such downward movement also causes the material of the base wall 117 to be bent dOW11-' wardly as shown at 139 at,the radially inneredge of the groove 131. The cylinder101 is restrained'from downward movement by any convenient, pref-erably resilient, means not shown and therefore does not move downwardly with the base portion 107. In their posi tions shown in FIGURE 12, the vertical distance between the bend 138 and the top of the prerollededge portion 108 is preferably r 6 inch and the vertical dis-j tively widely from cylinder to cylinder.

. large angular preroll.

considerable magnitude between the contacting faces of said wall and saidportions and therebyan effective seal therebetween. The incursion of the end 112 into the wall of the cylinder 101 adds to the effectiveness of said seal wherebyleakage from the interior of the container is effectively prevented.

It has been noted in testing this embodiment, that the rolling of a rim having an edge portion that is parallel through only a relatively small angle, such as 90, achieves the desired finished rim construction even when the wall thickness of the container cylinders varies rela- Thus, it is has been found that a rim construction method employing a small angular preroll is more tolerant of container wall variation than is a similar-method employing a relatively Though the cause of this elfect is not yet precisely known it has been hypothesized that the angularly earlier overcoming. of external and internal starting frictional forces between and within the involved elements produces a more smoothly continuous rolling of the rim where a smaller angular preroll is employed whereby the tolerance to disruptive effects is increased.

It should be noted that the rolling of the rim 106 and the formation of the groove 141 although described together'hereinabove for convenience in description, may if desired be performed separately whereby a rim 106 is so 7 formed on a container not including a base wall .having therein a groove 141 or whereby a groove 141 is formed 1 in the base wall of a container during the formation of tance between the edge 114 of the cylinder 101 and the 0 top of the edge portion 8 is preferably A3 inch. These .the top of said second container in an essentially interlocked 1 fashion wherein relative sliding movement between the adjacent radial faces of the stacked containers is prevented. A cover capable of nesting in a groove 141 V When the end 112 of the rim 106 reaches its position Of FIGURE'lS. said end 112 tends to dig may be made with a rolling die similar to the die 119 but having a circumference corresponding to that of the groove 141 whereby the rim of said cover may be inserted into said groove.

Alternate structure for container top FIGURES 15 and 16 disclose means for completing the rolling of the prerolled bead 148 lying against and inside of a wall on a cylinder 101a near the top edge thereof, said bead being integral with a rolled rim not shown which may be similar to the rim 106 of FIGURES 11 through 14. The bead 148 may be employed as a rest against which the rim of a suitable rimmed container cover such as discussed hereinabove might rest. The preformed bead 148 preferably has an outside diameter equal to that of the groove 131a of the die 116a which is preferably identical with the die 116 (FIGURES 11 through 14). A clamp mandrel 118a, preferably similar to the clamp mandrel 118 (FIGURES 11 through 14) is in the closing step preceding the descent of the rolling die 119, driven downwardly on the bead 148 whereby to move the end portion 149 thereof downwardly essentially to its position of FIGURE 16. Thereafter, a rim such as the rim 106 may be formed on the end of the base portion 107a in the manner hereinabove discussed in connection with FIGURES 11 through 14.

Thus, it is apparent that the same base mandrel 116, clamp mandrel 118 and rolling die 119 may be utilized to form a closure panel on the lower end of a container as is used to form an integral rim and cover stop bead for the upper end of said container. This forming of both top and bottom units of the container on a single machine will obviously facilitate the assembling of containers under any circumstances but will be especially useful where such assemblies are short runs of a given size or are done in the field. Further, the forming of the nesting parts of the top and bottom units in a single set of dies will facilitate the accurate nesting, and thereby stacking, of successively made containers.

While specific embodiments have been here utilized to illustrate the invention, it will be recognized that the invention will be applicable to a wide variety of containers and the hereinafter appended claims shall be so interpreted excepting as their terms may expressly require otherwise.

What is claimed is: 1. A method of attaching a rim to one end of a cylinder, said rim having a cylindrical inner portion, an arcuate intermediate portion extending away from said cylindrical portion and an arcuate end portion which extends from the outer end of said intermediate portion back toward said cylindrical portion, which comprises:

holding said rim and said cylinder in axially nonmovable relationship with said cylindrical portion being telescoped within said cylinder, said intermediate portion extending over one end of said cylinder and said end portion extending toward the outer wall of said cylinder spaced from said end thereof, the portion of said cylinder adjacent said one end thereof being free of outer restraint so that it can move radially outwardly; providing an annular die having an internal diameter substantially equal to the internal diameter of said cylindrical portion of said rim, said die having a radially inner edge portion of small width and having a substantially semicircular recess adjacent and encircling said edge portion, the diameter of said semicircular recess being substantially greater than the width of said intermediate portion of said rim;

disposing said die over said rim so that the inner edge portion thereof is substantially coaxial with and is sleeveable within said cylindrical portion of said rim and said intermediate portion of said rim is receivable in said recess;

moving said die axially toward said cylinder so that said inner edge portion thereof is received within and engages the internal surface of said cylindrical inner portion of said rim and deflects said rim outwardly, said arcuate intermediate portion of said rim being received in said recess and being moved radially outwardly therewithin, continuing to move said die axially while maintaining said portion of said cylinder free of outward restraint to effect deflection of said cylindrical portion so that successive Zones of the internal wall of said cylindrical portion are continuously brought into engagement with the wall of said recess and slide therealong and are shaped to closely conform thereto, the cylindrical portion thereby being deformed to a substantially semicircular shape, the intermediate portion being bent back toward the cylinder and the end portion being moved through an arcuate path so that it is disposed between the deformed cylindrical portion and the intermediate portion and extends away from the axis of the cylinder, the portion of the cylinder also being bent so that it substantially completely fills the space within said rim portions. 2. A method of attaching a rim to one end of a cylinder, said rim having a cylindrical portion and an upwardly and outwardly extending arcuate portion, which comprises:

holding said rim and said cylinder with said cylindrical portion of said rim being telescoped within said cylinder, said arcuate edge extending over and away from one end of said cylinder, the wall of said cylinder being straight and the portion of said cylinder adjacent said one end thereof being free of outer restraint so that it can be bent radially outwardly;

providing an annular die having an internal diameter substantially equal to the internal diameter of said cylindrical portion of said rim, said die having a radially inner edge portion of small width and having a substantially semicircular recess adjacent to and encircling said edge portion, the diameter of said semicircular recess being substantially greater than the radial width of said arcuate portion of said rim;

disposing said die over said rim so that the inner edge portion thereof is substantially coaxial with and is sleevable within said cylindrical portion of said rim and said arcuate portion of said rim is receivable in said recess;

moving said die axially toward said cylinder so that; said inner edge portion thereof is received within and engages the internal surface of said cylindrical portion of said rim and deflects said rim and said portion of said cylinder outwardly, said arcuate portion of said rim being received in said recess and being moved radially outwardly therewithin, continuing to move said die axially while maintaining said portion of said cylinder free of outward restraint to effect deflection of said cylindrical portion so that a section of said cylindrical portion slidingly contacts and is shaped to closely conform to the shape of said recess, the arcuate portion being coiled back toward the cylinder.

3. A method according to claim 2, in which the portion of the cylinder below said rim is snugly supported on a cylindrical mandrel so that the wall of said cylinder is held against inward buckling and the annular die is sleeved upon a clamp which is snugly received within said cylindrical portion of said rim to prevent inward buckling thereof.

4. The method of claim 2 wherein said cylindrical portion is integral with and extends essentially perpendicularly from the base wall of a bottom closure for said cyl inder, the further steps of supporting said base wall upon a radial face of a mandrel snugly located within said cylinder which mandrel has an annular groove in said radial face at the perimeter thereof; and

utilizing the motion of said die for shaping said rim for forcing the portion of said base wall adjacent said groove thereinto and essentially into conformance a with the shape thereof.

5. The method of claim 2 wherein said cylindrical:

portion is integral withand extends tangentially from a prerolled bead of unclosed,'-slightl y less than circular cross section; V

supporting a first portion of said bead closely c ontirnb' I ous with said cylindrical portion in a first annular groove in a radial face-of a rnandrelsnugly located within said cylinder, saidefirst annular groo've'being adjacent the perimeter of said radial face of said mandrel,

aligning a second portion ofi saidbead opposed to said' References Cited by theExarniner 7 V ,UNITHEDSTATES PATENTS Cross'etaL 4. 229-4.5 Halle 93 39.1 Qrossjet a1. 93-391 Magill' 93-39.1

Grov'ei f Horning" 2294.5 Minteer et al'. 229-4.5 Carpenter et al "93-39.1 X Meyer-Jagenberg -93--39.1

Examiner.

Claims (1)

1. 2. A METHOD OF ATTACHING A RIM TO ONE END OF A CYLINDER, SAID RIM HAVING A CYLINDRICAL PORTION AND AN UPWARDLY AND OUTWARDLY EXTENDING ARCUATE PORTION, WHICH COMPRISES: HOLDING SAID RIM AND SAID CYLINDER WITH SAID CYLINDRICAL PORTION OF SAID RIM BEING TELESCOPED WITHIN SAID CYLINDER, SAID ARCUATE EDGE EXTENDING OVER AND AWAY FROM ONE END OF SAID CYLINDER, THE WALL OF SAID CYLINDER BEING STRAIGHT AND THE PORTION OF SAID CYLINDER ADJACENT SAID ONE END THEREOF BEING FREE OF OUTER RESTRAINT SO THAT IT CAN BE BENT RADIALLY OUTWARDLY; PROVIDING AN ANNULAR DIE HAVING AN INTERNAL DIAMETER SUBSTANTIALLY EQUAL TO THE INTERNAL DIAMETER OF SAID CYLINDRICAL PORTION OF SAID RIM, SAID DIE HAVING A RADIALLY INNER EDGE PORTION OF SMALL WIDTH AND HAVING A SUBSTANTIALLY SEMICIRCULAR RECESS ADJACENT TO AND ENCIRCLING SAID EDGE PORTION, THE DIAMETER OF SAID SEMICIRCULAR RECESS BEING SUBSTANTIALLY GREATER THAN THE RADIAL WIDTH OF SAID ARCUATE PORTION OF SAID RIM; DISPOSING SAID DIE OVER SAID RIM SO THAT THE INNER EDGE PORTION THEREOF IS SUBSTANTIALLY COAXIAL WITH AND IS SLEEVABLE WITHIN SAID CYLINDRICAL PORTION OF SAID RIM AND SAID ARCUATE PORTION OF SAID RIM IS RECEIVABLE IN SAID RECESS; MOVING SAID DIE AXIALLY TOWARD SAID CYLINDER SO THAT SAID INNER EDGE PORTION THEREOF IS RECEIVED WITHIN AND ENGAGES THE INTERNAL SURFACE OF SAID CYLINDRICAL PORTION OF SAID RIM AND DEFLECTS SAID RIM AND SAID PORTION OF SAID CYLINDER OUTWARDLY, SAID ARCUATE PORTION OF SAID RIM BEING RECEIVED IN SAID RECESS AND BEING MOVED RADIALLY OUTWARDLY THEREWITHIN, CONTINUING TO MOVE SAID DIE AXIALLY WHILE MAINTAINING SAID PORTION OF SAID CYLINDER FREE OF OUTWARD RESTRAINT TO EFFECT DEFLECTION OF SAID CYLINDRICAL PORTION SO THAT A SECTION OF SAID CYLINDRICAL PORTION SO THAT A SECAND IS SHAPED TO CLOSELY CONFORM TO THE SHAPE OF SAID RECESS, THE ARCUATE PORTION BEING COILED BACK TOWARD THE CYLINDER.

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