US2197439A

US2197439A - Can and method of making the same

Info

Publication number: US2197439A
Application number: US68829A
Authority: US
Inventors: Sebell Harry
Original assignee: CROWN CAN Co
Current assignee: CROWN CAN Co
Priority date: 1936-03-14
Filing date: 1936-03-14
Publication date: 1940-04-16
Anticipated expiration: 1957-04-16

Description

April 2 1949' H. SEBELL 2,197,439

CAN AND METHOD OF MAKING THE SAME Filed March 14, 1936 2 Sheets-Sheet 1 'lnvenToT.

Harry 5e bel I WWW/(W A TTys.

April 1940- H. SEBELL 2,197,439

CAN AND METHOD OF MAKING? THE SAME Filed March 14, 1936 2 Sheets-Sheet 2 Fig.5.

MN lnvenTor.

L' 4* Harry Sebell 7| b /WaMlW I ATTys.

Patented Apr. 16, 1940 UNITED STATES PATENT OFFICE 2,197,439. CAN AND METHOD OF MAKING THE SAME Application March 14, 1936, Serial No. 68,829

9 Claims.

This invention relates to cans and particularly to cans of that type in whch the can body is V provided at its open end with a seamless closurereceiving ring adapted to receive a closure of the plug type.

One of the objects of the invention is to provide a can of this type with a closure-receiving ring of novel construction and which is formed of a ring of sheet metal folded on itself and having both edges secured to the top edge of the can body.

A further object of the invention is to provide an improved method of making a can of this type according to which the closure-receiving ring and the bottom end of the can are cut from the same blank, thereby eliminating the waste which occurs where these parts are out from separate blanks.

A still further object of the invention is to provide a can of this type having a novel closure with means for securely retaining it within the closure-receiving ring. g

In order to give an understanding of the invention, I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claims.

In the drawings: Fig. 1 illustrates the partially-formed blank from which the closure-receiving ring and the bottom end of the can are formed.

Fig. 2 shows the partially-formed blanks severed into the two parts, from one of which the closure-receiving ring is produced and from the 3 other of which the bottom end of the can is made.

Fig. 3 is a view showing the bottom end of the can ready for assembly with the can body.

Fig. 4 is a view showing the bottom end seamed to the can body. a

Figs. 5, 6 and 7 are sectional views showing various steps in the operation of connecting the closure-receiving ring to the can body and giving said ring its final shape. v

Fig. 8 shows a sealed can embodying my inven- 47 tion with the cover or closure and upper part of the body in section and part broken out at the lower end of he body.

Fig. 9 is a fragmentary side view of the can 'with the cover applied thereto.

to Fig. 10 is a fragmentary sectional view showing l the closure applied to the can body.

l The can herein shown has a body portion l formed with the usual side seam 2 and also has a bottom end 3 which is seamed to the can as will be presently described. The upper end of the body portion l is formed with a seamless closurereceiving ring indicated generally at 4 which forms the mouth of the can and is adapted to receive the closure or cover indicated generally at 5. 6

The closure-receiving ring 4 is of novel construction in that it is formed from a sheet metal ring which is shaped to present an annular folded portion 6 intermediate of its edges and which fits with the top of the body portion I, 1 and has both edges bent outwardly and secured to the top edge of said body portion. In forming this closure-receiving ring there is first provided a ring-shaped blank of sheet metal having the annular depending fold 6 which is adapted to flt 15 into the open end of the can body I, one'edge ofthe blank presenting the outwardly-extending seaming flange I and the other edge presenting the upwardly-directed portion 8. 'I'he'can body l is shown as made with an outwardly-extending a0 seaming flange 9 and in assembling the ring 4 with the can body said partially-formed ring is placed in position with the fold 6 fitting within the mouth of the can body, as shown in'Fig. 5,

and with the seaming flange 1 resting on and 25 mating with the seaming flange 9 of the can body. The two seaming flanges I and 9 are then rolled together by means of a suitable seaming apparatus to form the double-lock seam indicated at Ill in Fig. 6 and thereafter the upstanding portion 8 30 of the partially-formed ring 4 is curled outwardly and rolled around the bead ID, as shown at H in Fig. 7. With this construction the complete closure-receiving ring 4 has the folded portion which fits within the mouth of the can body while the 35 two edges of the ring are rolled into and attached to the bead or double lock seam ill at the upper edge of the can body.

This produces a can body with a bead at its upper end and a seamless closure-receiving ring 4,0 to receive the plug closure 5.

According to another feature of my invention the closure-receiving ring d and the bottom end 3 of the can are made from the same blank and without any waste. To accomplish this a disk of 46 metal of the proper size is first deformed by means of dies or otherwise into substantially the shape shown in Fig. 1, such deformed disk presenting the cup-shaped portion I2 having the cylindrical side walls l3 and the closed end i4. so The material of the side walls is folded back on itself, as shown at 6, and the edge of the blank is then bent outwardly to form the outwardlyextending radial flange '1. After the blank l2 has been thus formed it is severed'along the dotted. u

from the portion "5 of the blank l2, said portionv I6 is first deformed again into substantially the shape shown in full lines in Fig. 3, this being done by expanding the edge 18 of the part l6 outwardly to form the flange l9. As thus deformed the can bottom 3 presents the peripheral outwardly-extending seaming flange l9 and the upstanding circular wall 20.

The can body I, which is shown in dotted lines, Fig.3, is formed at its lower edge with the outwardly-extending seaming flange 2| and the can bottom 3 is assembled with and attached to the can body by inserting the cylindrical wall of the can bottom into the lower end of the can body, thereby to bring the seaming flanges 2| Theseand I3 into contact with each other. flanges are then rolled into a double-lock seam 22, as shown in Fig. 4, thereby seaming the can bottom to the can body. This double-lock seam can be formed by any suitable seaming apparatus.

From the above it will be noted that the can bottom 3 and the closure-receiving ring 4 are both made from the same circular blank, and the portion of the blank which would be discarded in forming the ring 4 is utilized for the bottom end 3 of the can. It is possible to do this because of the fact that the blank l2 which is divided to produce the parts It and" has substantially the same diameter as the can body and hence the section ll of the blank 12 is of such a diameter that when the edge l3 thereof is expanded outwardly to form the flange I! the circular wall 20 is of a size to flt into the lower end of the can body.

The amount of sheet material required for making the blank l2 from which the closurereceiving ring 4 and the can bottom 3 are produced is less than that required in making a closure-receiving ring of the type now commonly used and a can bottom where these two parts are made from separate blanks.

The closure 5 for the can is of the plug type adapted to have a friction flt within the closurereceiving ring I. As herein shown the closure plug 5 is formed with the cylindrical wall 23 of a size to frictionally flt within the closure-receiving ring I, and, the marginal portion 2| of the I closure is folded back on itself, as shown at 25, to form a folded rim. The closure is shown as having a raised center portion 26 which produces an annular groove 21'between the raised portion and the cylindrical wall 23.

In order to provide for readily removing the closure, I propose to deform the marginal portion 24 of the latter at certain points by raising it slightly to produce the bumped portions 28. At these bumped portions the rim 24 is spaced from the upper edge of the can body, as shown at 23, so that a screw-driver or similar implement can be readily inserted beneath the edge of the closure when it is desired to pry the latter loose from the can body.

If the closure is made with the circular wall 23 having the same exterior diameter as the interior diameter of the closure-receiving ring 4, then the closure will fit within the ring, as shown in Fig. 10.

If, however, the closure is so made that the outside diameter of thecircular wall 23 is an increment greater than the interior diameter of the closure-receiving ring 4 and the vertical dimension of said wall 23 is greater than the ring I, then when the cylindrical wall 23 of the closure is forced into the ring I, said wall will be contracted slightly as it enters, the ring, and when the closure is completely seated in the ring the portion 30 of the closure which projects below the ring will tend to expand outwardly slightly so as to provide a slight locking effect, as shown in Fig. ,8. It will be understood, however, that the degree of expansion of the part 30 of the closure after it has passed through the ring 4 is somewhat exaggerated in Fig. 8.

I claim:

1. A can comprising a body portion having the edge of its open end rolled into an exterior head, a closure-receiving ring at the open end of the body portion, said ring being formed from sheet metal and presenting a folded portion within the open end of the body portion and having one of its edges rolled into said bead and the other edge folded over the bead.

2. A can comprising a body portion having the edge of its'open end rolled into an exterior bead, a two-ply closure-receiving rin within the open end of the can body, the two plies of the ring being integrally connected within the can body and each ply having its edge forming part of the head, the inner surface of said ring serving to receive a closure of the 'plug type.

3. The method of making a can which consists in forming a can body with an outwardlyextending seaming flange at its open end, forming a closure-receiving ring with an outwardlyext-ending seaming flange, a depending folded portion and an upstanding portion, assembling the ring with the body portion by inserting the folded portion of the ring into the open end of the body and bringing the seaming flanges into mating relation, rolling the seaming. flanges together into a bead' formation, andsubsequently folding the upstanding portion of the ring over the bead.

4. The method of making a can which consists in forming a cylindrical can body, forming a closure-receiving ring with an outwardly-extending flange, a cylindrical depending portion and a cylindrical upstanding portion constituting an extension of the cylinder formed by said depending portion, assembling the ring with the body by inserting the depending portion into the open end of the body with the outwardly-extending flange resting against the upper end of the body, securing said flange to the body, and then folding the upstanding portion of the ring outwardly over the edge of the can body.

5. The method of making a can which consists informing a can body with an outwardlyextending seaming flange at its open end, forming a closure-receiving ring with a cylindrical portion to fit within the open end of the can' and two free edge portions, one of which extends horizontally and the other vertically with respect to the can when resting on end with the open end uppermost, assembling the ring and the can body with the cylindrical portion of the ring fitting within the open end of the can body and with the horizontal flange of the ring mating the seaming flange of the can body, rolling the two mating flanges together into a double-lock seam,

and folding the upstanding flange of the ring over the double-lock seam thus formed.

6. A can comprising a body, a closure receiving ring at the open end of said body, said ring being formed from an annular strip of sheet metal presenting a folded portion lying against the interior of the open end of said body and having both edges folded over the edge of the open end of said body, the inner-surface of said folded portion serving to receive a closure of the plug type.

'7. The method of making a can which comprises forming a can body with an outwardly extending seaming flange at its open end, forming a closure receiving ring with an outwardly extending seaming flange, a portion folded back upon itself to form a fold and an upstanding portion, assembling the ring with the body portion by positioning the folded portion of the ring against the interior of the open end of the body and bringing the seeming flanges into mating relation, rolling the seaming flanges together into a bead formation, and subsequently folding the upstanding portion of the ring over the bead.

d. A can comprising a body portion having an open end, the edge of the open end of the can' ing rolled into an exterior bead, a closure receiving ring secured to said body portion at its open end, said ring being formed from an annular strip of sheet metal having a portion folded back upon itself, said folded portion lying within the open end of said can body and its inner surface serving to receive a closure of the plug type, both of the edges of said ring being turned outwardly over the edge of the open end of the can body and secured to said bead.

9. A can comprising a body portion having an open end, the edge of the open end of said can being rolled into an exterior bead, a closure receiving ring secured to said body portion at its open end, said ring being formed-from an annular strip of sheet metal having a portion folded back upon itself, said folded portion lying againstthe interior of the open end of said body portion and its inner surface serving to receive a closure of the plug type, both of the edges of said ring said ring being rolled into said bead.

HARRY SEBELL.