US2640524A

US2640524A - Apparatus for bending metal rims around containers

Info

Publication number: US2640524A
Application number: US754542A
Authority: US
Inventors: Herbert L Carpenter
Original assignee: CARPENTER CONTAINER CORP
Current assignee: CARPENTER CONTAINER Corp
Priority date: 1947-06-13
Filing date: 1947-06-13
Publication date: 1953-06-02
Anticipated expiration: 1970-06-02

Description

June 2, 1953 H. l.. CARPENTER 2,540,524

APPARATUS FOR BENDING METAL RIMS ARoUNDKcoNTAINERs Filed June 15, 1947 5 Sheet-s sheet l 53:55,??? 20 @my L v M i y 7. 26 R A f: F A /2 MIIHIIHII! l l@ D A* 5 I Il" j 30 25 24 23 27 22 INVENTOR. HERBERT L CARPENTER.

ATTRNEYS June 2, 1953 H. 1 CARPENTER 2,640,524

APPARATUS FOR BENDING METAL RIMS AROUND CONTAINERS Filed June 13, 1947 5 Sheets-Sheet 2 Y11W/ANTON. HERBERT L. CARPENTER ma/'maf TTRNE'YS.

June 2, 1953 H. CARPENTER 2,640,524

APPARATUS FOR BENOTNG METAL RIMS AROUND CONTAINERS Filed June l5, 1947 5 Sheets-Sheet 5 INVENTOR. HERBERT LCARPENTER Ammers.

June 2, 1953 H. l.. CARPENTER 2,640,524

APPARATUS FOR BENDING METAL RIMS AROUND CONTAINERS Filed June 13, 1947 5 Sheets-Sheet 4 A o o OO INVENTOR.

HERBERT l.. CARPENTER 41 ZQAM A fm TTORNEY5.

June 2, 1953 H. l.. CARPENTER 2,640,524

APPARATUS FOR BENDING METAL RIMS AROUND CONTAINERS Filed June 13, 1947 5 Sheets-Sheet 5 Rmx@ JNVENTOR. HERBERT LCARPEN'IER BMM Ji Patented June Z, 1953 APPARATUS FOR BENDING METAL RIMS AROUND CONTAINERS Herbert L. Carpenter, Amityville, N. Y., assigner to Carpenter Container Corporation, Brooklyn, N. Y., a corporation of Delaware Application June 13, 1947, Serial No. 754,542

2 Claims. l

This invention relates to :an improved container particularly the closure portion thereof and to an improved method and machine for applying the closure.

It is an object of the invention to provide an improved machine whereby the closure may be applied automatically and without manual labor, the amount of time required to apply the closure is reducedV and the operation of applying the closure is greatly simplified.

In many types of container, such as bre concontainers, the container body is in the form of a tubular shell and a closure is permanentlyapplied to one end of the shell. The application of this closure to the shell presents problems in that it is time consuming and frequently requires manual labor and also difficulty is encountered in obtaining sealing engagement between the closure and shell. In one type of closure a cover or head is fitted into the end of the shell and a split metal rim is tted around the outside of the shell and provided with a flange which overlaps lthe head. Generally, the metal rim is fairly irregular in shape and difficulty is encountered in causing it'to conform in shape with the outside of the shell. Also, difficulty is encountered in .permanently securing the split metal rim in place.

It is an object of the present invention to overcome these diiculties and disadvantages and to provide an improved container closure construction and an improved method and machine for applying the closure whereby the rim is automatically caused to conform in shape with the exterior of the shell and is automatically secured in position retaining the closure in position in sealing engagement with the shell.

Other objects will be apparent from the'following description-of the drawings in which- Fig. 1 is a partially fragmentary elevational View of the lower portion of a container showing a closure construction embodying my invention;

Fig. 2 is a detailed sectional View 0f the overlapping portions of the rim Iand the adjacent parts of the closure and shell; v

Fig. 3 is a perspective View of a staple or fastener used in connection with my container closure construction;

Fig. 4 is a cross sectional View in the direction of the arrows on the line 4 4 of Fig. 3;

Fig. 5 is a perspective view of the lower portion of the container illustrating the manner in which the closure is assembled therewith;

Fig. 6 is a perspective View from the opposite angle of Fig. 5 showing the parts inl process of assembly lar shape of the rim before application to the container;

Fig. 8 is a view similar to Fig. 6 with the closure fully applied thereto;

Fig. 9 is a detailed sectional View somewhat similar to Fig. 2 illustrating a modied rim construction;

Fig. 10 is an elevational View with portions omitted of a machine for applying the closure illustrating the machine at its initial operating position with the clamping ringin open position;

Fig. l1 is a cross sectional View of the clutch disks of the machine;

Fig. `12 is a detailed view of the pressure shoe and roller of the machine when the machine is in the initial position shown in Fig. 10;

Fig. 13 is an elevational view of the machine at a subsequent operating position when the clamping ring has been shifted to fully closed position; v

Fig. 14 is a detailed view showing the location of the pressure shoe and roller when the machine is in the position shown in Fig. 13;

Fig.v l5is a front elevational view of the mechanism shown in Fig. 14 when in the same position;

Fig. 16 is an elevational view of the operating portions of the machine upon the completion of the eiective operatingY cycle but prior to the opening of the ring; v

Fig. 17 illustrates the location of the pressure shoe and roller when the machine is in the position indicated in Fig.v 16.

My improved container closure construction is shown in the iirst 9 figures of the drawings. Referring Yto the first form of my invention shown i'nFigs. l to 8, the container is provided with a tubular body portion 20 made of suitable mate,- rial such as convolutely woundbre having the several layers suitably secured together byvan adhesive or synthetic resin. Only the lower portion ofthe tubular body is shown and the lower end thereof is formed to receive a closure which is permanently secured in position. Thus, adjacent the lower end I provide an internal rib or bead 2| which provides a corresponding external groove. The form of the rib or bead may vary butI prefer to form it as shown with the lower face thereof presenting a relatively sharp shoul- 3 der and the upper surface tapering gradually to merge with the cylindrical wall of the main portion of the container body.

Extending beyond the rib or bead 2l is a nange 22. Fitted into the anged end of the container body so as to rest on the bead is the closure consisting of a Vrigid head 23 and a flexible seal 24. The head 23 may be made of nbre or if preferred may also be made of wood, metal or other suitable material. made of paper treated with wax, synthetic resin or the like and extends over the inner surface of the head as shown then outwardly between the head and iiange of the container body and overlaps the outer surface of the container body.

The closure is held in position by means of a split lock rim 25 which surrounds the end of the container body and has a beaded portion 25 fitted into the external groove of the container. The rim also has an inwardly projecting ange .21 which overlaps the head 23 and serves to retain it in place.

The rim is caused to conform in shape with the end of the container and is fitted therearound so as to tightly embrace the container and the end of the seal with the bead 26 disposed `in the groove and with the flange 21 overlapping the head. The rim is locked in this position by means of a staple 28 extending through pairs of apertures 29 and 3 0 formed adjacent the overlapping and underlying ends of rim..25. The staple is projected outwardly from the undersurface of the underlying rim portion and the 2 'leg portions thereof are folded downwardly over the outer overlapping rim portion towards the end thereof as shown most clearly in Figs. l, 2 and .8.

The staple used for this purpose is preferably of the type shown in Figs. 3 and 4 and is made from stock which is elliptical or oval in cross f section. I have found that eliminating the sharp corners along the edges of the staple minimizes damage to the rim and also to the staple itself. There is a constant expanding force operating on the rim with the result that the two ends of .11

the rim pull in opposite directions against the two arms of the staple. The rounded edges of the staple prevent it from cutting into and damaging the rim. ln this connection I have found that itis desirable for the

apertures

29 and 30 to be also formed with rounded edges as shown.

The manner in which the closure is assembled with 'the container is shown in Figs. 5 7. Thus, the head 23 and seal 24 are inserted in the end of the container body and the Asplit rim. is partially assembled therearound after a staple 28 has first been inserted through the apertures 29 in the underlying end portion with the angularly disposed arms slanting towards the end thereof.

The rim 25 is stamped and formed from sheet metal preferably steel and while it conforms generally in circumference with the circumference of the container it is somewhat irregular in shape and does not conform in contour with the external surface of the container. The irregularities in contour are shown most clearly in Figs. 6 and '7. In Fig. 6 it will be seen that gaps or spaces exist between portions of the rim and the container surface. In Fig. 'i the amount of departureof the rim from a true arc is indicated by showing the true arc in dotted lines.

Thev rim is drawn tightly around the container and caused to conform in shape and contour therewith and the apertures 3B are then brought into registry with the ends of the staple 28. The

The exible seal 24 is preferably insertion of the ends of the staple into the apertures 3B is facilitated because of the fact that the staple arms slant towards the end of the rim. The outer overlapping end portion o-f the rim is then brought down into contact with the underlying end portion of the rim and this action serves to further tighten the rim as the apertures are shifted downwardly towards the base of the staple. The ends of the staple are then bent over towards the outer end of the rim as shown in Figs. l, 2 and 8.

When assembled in this fashion the locking rim is vcaused to fit snugly around the end of the container and conform therewith in contour and size as appears most clearly in Figs. 1, 2 and 8. The closure or head is thus held securely in position and sealing engagement is provided between the closure and container body.

When the projecting ends of sta-ple 28 are bent over toward the end of the overlapping portion of the rim they assume generally theipositions indicated in Fig. 2. The principal forces acting upon the locking rim are expanding forces acting to expand the rim. These forces act in the directio-n of the two arrows shown in Fig. 2 Vand it will be seen that the staple is arranged to withstand or resist these forces. Due to the .fact that the longitudinal edges of the staple are rounded rather than sharp the edges of the staple will not cut into and damage the rim.

Under some circumstances it may be desirable to reinforce the portions of the rim through which the staple projects and an arrangement of this type is indicated in Fig. 9 in which the overlapping and underlying ends of the rim 25 are reinforced by means of the plates 3| and 32. The plate 3| reinforces the outer portion of the rim and the plate 32 reinforces the underlying end portion. The plates Si and 32 are apertured in the same manner as the rim itself to accommodate the two arms of the staple. It will be appreciated that they may be formed integral with the rim itself by simply folding or bending portions of the rim over upon itself or they may be separate plates welded to the end portions of the rim. A rim which is reinforced in the manner shown in Fig. 9 is assembled with the container and closure in the same manner as rim in Figs. 1 8.

The assembling and closing of the rim in the manner described above may be accomplished by manual means or may be accomplished mechanically and automatically by means of mechanism such as that shown in Figs. 10-l7.

The machine or mechanism illustrated in the drawings is provided with a suitable supporting base and standard 33 and framework 34. Supported on the standard and framework as on a platform 35 is an expandable and contractable slit pressure ring made of relatively stiff spring material such as spring steel. The lower portion of the ring is approximately a true arc of a circle of the approximate size of the external diameter of the container and rim which is to be assembled. The ring is open at the top as shown. and the two sides thereof depart progressively to an increasing extent towards the ends thereof when the ring is in the open or expanded position shown in Fig. l0.

When the ring is in the open position shown in Fig. l0 a drum having a closure inserted in they end thereof and a rim partially assembled therearound as shown in Figs. 5 and 6. may be inserted into the expanded clamping ring with the overlapping portions of the rim disposed in the open upper portion thereof as indicated -in dotted lines in Fig. 10. Thereafter the two ends of the pressure ring may be drawn together. As the two ends of the ring are drawn together the container body serves as a mandrel or core and the two sides of the ring serve to wrap and press the locking rim 25 tightly around the container body working progressively from the bottom towards the two ends of the rim.

As previously stated the ring 36 is made of relatively stiif material and in this connection the material should be more stiff and rigid than the material forming the rim 25. Accordingly, as the ring is progressively tightened around the superimposed rim and container it acts somewhat in the nature of a forming die and it causes the rim to conform substantially in shape and contour with the outside of the container body.

My machine also includes a pressure shoe `31 and roller 38 which are mounted upon a lever 39 pivoted at 40 by a slotted connection, permitting limited vertical movement thereof, to an upright 4|. At the initiation of the cycle of operation, when the pressure ring 3G is in open position, the pressure shoe 31 and roller 38 are disposed above and out of contact with locking rim. Simultaneously with the contraction of the ring 36 the pressure shoe and roller are shifted downwardly into contact with the overlapping end portion of rim 25 so that when the ring is contracted, as shown in Fig. 13, the roller and pressure shoe are in contact with the rim. The pressure shoe causes the overlapping end portion of the rim to lie flat against the other end portion thereof. In this connection, the clamping action of the ring, which works progressively from the central portion of the rim towards the two ends thereof, serves to shift the end portion into increasingly overlapping relationship so that the two apertures 30 in the overlapping rim portion approach a point of registry with the two apertures 26 in the underlying rim portion.

As previously pointed out, the arms or prongs. of the staple 28 are disposed at an angle and the staple is inserted through the apertures 29 so that the prongs slant towards the apertures 39. As the pressure shoe 31 forces the overlapping end of the rim downwardly, the prongs of staple 28 enter the apertures 39 and continued downward pressure serves to feed the apertures 3D towards the base of the staple, further contracting the rim 25 and causing the rim to assume the position shown in Fig. 14.

Simultaneously with the shifting of the pres-f sure shoe and roller downwardly they are shifted slightly to the left as shown in Figs. 13 and 14. When the parts are in the position shown in Figs. 13 and 14 theY pressure shoe and roller are then shifted through an arc to the left to the positions shown in Figs. 16 and 17 causing the ends of the staple arms to be folded or bent downwardly thereby locking the rim in position.

The action in bending the staple arms downwardly is as follows-pressure shoe 31 is formed on the end of a bracket 42. On the lower end of bracket-42 adjacent the pressure Shoe is an anvil 43 presenting an angularly disposed face and terminating a short distance above the lower portion of the pressure shoe. The anvil 43 is arranged so that the staple arms are in the pathA of movement thereof. The anvil is of such a height as to engage only the upper portion of the staple arms as it is shifted towards the left and it serves to tiplover or incline the upper portion of the staple prongs towards the left. Thereafter the roller 38 engages the staple arms and rolls them down under pressure against the surface of the overlying rim portion as most clearly shown in Fig. 17.

After the staple arms have been rolled down against the rim the pressure ring can again be expanded and the pressure shoe and roller are raised upwardly and shifted back to the position indicated in Figs. 10 and 12. The assembled container can then be removed from the ring and another container with the closure inserted therein and with the rim partially assembled thereabout can then be inserted in the ring and the operation repeated.

The operation just described can be manually I performed or can be performed automatically as,

for instance, by hydraulic mechanism or by an electric motor as shown in the drawings.

v In the drawings I have shown an electric motor 44 connected to a gear box 45 which in turn operates the drive shaft 46. Mounted on the drive shaft to rotate therewith is a drive wheel or disk 41. Also, supported on the drive shaft but rotatable with respect thereto is the clutch disk 48. The confronting face of the drive wheel 41 is provided with a circular groove 49 and pro-,- jecting into the groove at one point is the fixed lug 56. Mounted in the clutch disk 43 is the retractable pin 5I which is normally pressed-by spring 52 into the groove 49. It will be appreciated that when the lug 59 engages the pin 5l it causes clutch disk 48 to rotate with drive-wheel 41.

The clutch disk may be disconnected from the drive wheel by means of the dog 53 having an inclined upper end engageable with an inclined slot formed in pin 5 I The inter-engagement between the dog and slot in the pin causes it to retract the pin and release the engagement between the clutch disk and drive wheel. The dog 53 is mounted atthe end of lever 54 having a weight 55 at the end thereof which serves normally to hold the dog in the path of movement of the pin so as to cause disengagement. The dog may be withdrawn from the path of movement by depressing pedal 56 which is connected by means of link 51 to the dog. i f. v A- friction drag 56 engages the periphery of clutch disk 43 so as to cause -it to stop immediately when the engagement between the drive wheel andclutch disk is released.

A pair of links 59 and 6D are pivotally connected-to clutch disk 43 by means of eccentric pin 6|. Link 59 is connected adjacent its opposite end by pivotal connection 62 to lever 39 and link 6B is connected adjacent its opposite end to lever 63. 39 are preferably provided with a plurality of apertures through which the pin 62 may be selectivelyI inserted to provide for adjustment of the apparatus for use with different size containers. The lower end of lever 63 is pivotally connected at 64 to one end of pressure ring 36. I At an intermediate point lever 63 is pivoted to link 65 which in turn is adjustably connected adjacent its opposite end to the other end of ring 36 as shown at 66. Link G5 is also connected by helical spring 61 to the upper frame work of the machine, the spring serving to normally retain the parts in the position indicated in Fig. 10 withv the pressure ring expanded. The intermediate portion of lever 63 also connected with an adjustable link 68 which in turn is connectedat its opposite end to lever 66. At an intermediate It will be seen that the'link 59 and leveiFK 7 point'the lever 68 is pivotally connected by the pin to the lower end of lever t9. At the same point it has a slotted connection with the standard M permitting limited vertical movement. Adjacent its opposite end lever $9 has 'a slotted connection by means of pin l to upright li permitting limited horizontal movement of the lever.

In the normal operation of the device the motor M is turned on and dog 53 being disposed in the path of movement oi retractable pin l causes the clutch disk to release its engagement `from drive wheel 4l' and to remain stationary. Ring 36 is then in the expanded position shown in Fig. 10 and a container having a head inserted therein and a rim partially assembled therearound and with a stap-le projecting through the apertures 29 in the underlying portion thereof is then inserted in the pressure ring with the ring surrounding the locking rim` and with the overlapping ends of the locking rim in the Vposition shown in dotted lines in Fig. I0.

To initiate the cycle of operation. pedal il@ is momentarily depressed so as to permit the clutch to be engaged by the drive wheel. The clutch then moves from the position shown in Fig. l0 E0 the position shown in Fig. 13 with link 50 pushing lever 63 downwardly. The action of lever 63 through the pivotal connection 'B4 with the one end of pressure ring 36 and through link E5 with the opposite end thereof causes ring to shift to contracted position. Simultaneously link 6B forces the outer end of lever 89 downwardly shifting lever 39 downwardly, so that the pressure shoe 31 and roller 38 are moved into engagement with the rim to the position shown in Figs. 13 and 14.

Thereafter clutch 48 continues to rotate towards the position indicated in Fig. 16 with the result vthat the effective action of link 59 is brought' into operation. The link 5B during this portion of the cycle exerts a direct thrust against the upper end of lever 39 causing it to shift to the left moving the pressure shoe, anvil and roller until they assume the positions shown in Figs. 16 and 17. When in this position the staple has been bent downwardly to closed or locked position and the cycle of eifective operation has been completed. Continued operation results in rotation of the clutch disk 48 in a clockwise direction back to the position shown in Fig. 10. Then, dog 53 again releases the clutch and the mechanism is halted with the pressure ring in expanded position and the pressure shoe and roller in elevated position permitting the assembled container to be withdrawn and a new partially assembled container to be inserted.

By adjusting the

links

68 and 65 and adjusting the connection between link 59 andlever 35i and by replacing the clamping ring 36 with other clamping rings of diiferent sizes it will be appreciated that the mechanism can be varied so that it can be used for assembling containers of varying sizes.

In the operation of my machine it will be seen that the locking rim is first partially assembled around the end of the container in which the closure has been inserted. Prior to this, staple 28 has been inserted through the apertures 2e in the underlying end of the rim. Thereafter force or pressure is progressively exerted against the rim so as to cause it to conform in shape and contour with the outer surface of the container. This force or pressure is exerted progressively t0- wards one or both ends of the rim so that the entire rim is caused to embrace the container and conform in contour therewith and the apertures adjacent opposite .ends are brought into approximate registry. The overlapping end is then brought downwardly intolcontact with the underlying end and due to the angularly disposed staple prongs, the apertures in the overlapping end readily engage the staple arms. As the overlapping end is brought down towards the base of the staple, the rim is further tightened. Finally the staple ends are bent over by first pre-setting the ends and then rolling them flat against the outer surface of the rim.

It will thus be seen that I have provided an improved machine and method whereby a closure may be applied to a container automatically. The amount of time required to apply the closure is greatly reduced and the operation of applying it is greatly simplified. It will also be seen that I have provided an improved container closure construction which is sturdy and strong, in which the closure forms sealing engagement with the container and in wln'ch the closure is firmly held in position against accidental displacement. Modiiications may be made in the illustrated and described embodiment of my invention without departing from the invention as set forth inthe accompanying claims.

I claim:

l. Apparatus for use in tightening and securing a split metal rim around a container after it has been loosely assembled therearound with the ends in overlapping relationship and for thereafter bringing the overlapping ends of the rim into Contact and securing a metal fastening lug in position comprising: a unitary pressure .ing made of relatively stiff spring metal and being split at one point in its circumference so as to have two free ends which are spaced apart so as to beexpandable into a size to freely accommodate the container with the rim loosely assembled therearound and contractable to tightly embrace the container and rim; operating means for the pressure ring including a lever pivotaliy connected at one end adjacent one free end of the pressure ring and a link connected 'oetween the other free end of the pressure ring and an intermediate point of the lever so that pivoting of the lever in one direction causes the free ends to separate and the ring to expand and pivoting of the lever in the other direction draws the two free ends towards each other and causes the ring to contact, with a maximum amount of movement adjacent the free ends and progressively descreasing towards the diametrically opposite side thereof; and a second lever pivotally mounted adjacent said pressure ring and having a pressure shoe and a pressure roller mounted thereon at a point between the free ends of the pressure ring and being shiftable with the lever through a iixed path between the two free ends of the pressure ring, said pressure shoe being engagea-ble with overlapped ends of the rim to'press them into contact and said pressure roller being engageable with a fastening lug for securing it in position.

2. Apparatus as set forth in claim 1 in which the second lever is operatively connected to the rst mentioned lever so that the pressure shoe and roller are shifted to operative position when the pressure ring is contracted and are shifted to inoperative position when the pressure ring is expanded.

HERBERT L. CARPENTER.

References Cited in the le 0f this patent UNITED STATES PATENTS Number Name Date Buckley Aug. 14, 1888 Walker May 2 ,1905 Kortck et, al Dec. 15, 1908 Brown Dec. 27, 1927 Aulbach June 23, 1931 Bradley Apr. 19, 1932 Christman Nov. 20, 1934 Hulbert Aug. 10', 1936 Eisenhauer Aug. 30, 1938 Pierce May 14, 1940 Goldberg Aug. 13, 1940 Crabtree Jan. 7, 1941 Number Number Sweden Apr. 20, 1905