US1742336A - Metallic receptacle and process of making it - Google Patents

Description

Jan. 7, 1930. 'c, M, AGNEw 1,742,336

METALLIC RECEPTACLE AND PROCESS OF MAKING IT FiIed March 5, 1923 045 Amy fitnfivm.

A TTORNEYS.

Patented Jan. 7, 1930 CLAIR M. AeNEw, or MILWAUKEE, WISCONSIN METALLIC RECEPTACLE AND PROCESS OF MAKING I'I.

Application filed March 5, 1923. Serial No. 622,851.

This invention relates more particularly to cans which are usually made from sheet steel and are coated with tin or the like to prevent contamination or deterioration of their contents such as milk, cream, ice cream and the like.

The main objects are to produce a strong, durable can or receptacle which will stand continued hard usage without employing sol der in its construction; to avoid crevices, seams, angles or ridges in or on which any of the contents of the receptacle, such as cream. or other substances, can lodge and become rancid, tainted or stale so as to inj uri- 5 ously affect subsequent contents of the receptacle; to facilitate coating with tin or other material, and cleaning the can; and generally to improve the construction and increase the strength, durability, utility and sanitary properties of such receptacles.

It consists in the method of performing the operations involved in the production of receptacles of this kind from sheet metal, and in the peculiar structural features of such receptacles, as hereinafter particularly described and pointed out in the claims.

In theaccompanying drawing, illustrating the several steps of the process in the production of a receptacle in accordance with the invention, like characters designate the same parts in the several figures.

Figure 1 is a vertical section of a part of an ice cream can or the like, method of fusing the bottom to the body in accordance with the invention; Figs. 2 and 3 are similar views of the can in different stages of its construction, illustrating further steps or operations of the process; and Fig. 4.- is a broken view partly in vertical section 4 and partly in side elevation, of a com letely formed can, illustrating the method 0 forming the rims at the top and bottom of the can.

In performing the process for producing an ice cream can or the like, as shown in the drawing, the body 1 of the can, which is preferably of cylindrical form, may be drawn seamless from a sheet steel blank, or made from a fiatsheet bent into cylindrical form,

opposite edges of the sheet being brought to- 59 gether and joined by welding.

illustrating the- The bottom 2, which the upper side, is sta is of concave shape on mped or pressed from a flat sheet steel blank with an upturned marginal flange 3, which is of cylindrical shape and fitted into the body above and adjacent its lower end, a

The flange 3 along and tttljilCOllt its s shown in Fig. 1.

of the bottom is then fused edge to the body, preferably by electric seam-welding, two rotary electrodes 5 and 6 this purpose. face, 1s held against being shown in Fig. 1 for The electrode 5 having a plain the outer side of the body 1, opposite the flange 3 of the bottom.

The electrode 6, having a narrower face preferably slightly beveled as shown, is held inside of the can opposite the electrode 5, towards which it is pressed against the flange 8.

Current being supplied to the electrodes 5 and 6, 'and'the can being rotated between them, the upturned edge of the flange 3 is fused to the body 1 to form an integral union therewith, as shown in Fig. 2.

In the fusion of the to the body flange 3 of the bottom 1, the shoulder primarily formed by the upper edge of the flange within the can, as shown in pletely obliterated Fig. 1, is nearly or comas shown in Fig. 2, so

that the upper concave surface of the bottom merges into the inner the body 1 without abrupt angle any ridge, ament the zone of the between the bottom cylindrical surface of formlng therewith an or break. However, to remove burr or roughness along and adwelded or fused union and body, the can is ground, machined or rolled inside to produce a smooth continuous s urface along and adjacent the junction between the bottom and the body, as shown in Figs. 3 and 4:, thereby avoiding any crevices, ness in or on whlch an burrs, ridgesor roughy of the contents of the can or foreign matter may lodge or stick when the can is emptied and cleansed, so as to contaminate or deleteriously ail'ect materials such as cream or milk products subsequently placed in the can.

To reinforce and strengthen the upper and lower edges of the ca metal bands 8 and 9,

ammed and bent with the hard which receptacles of this class are n, which are apt to be usage to sub Qcted,

are fitted and fastened to the body 1 adjacent its lower and upper ends. The bottom band 8, which in connection with ice cream cans is preferably fitted inside of the body to avoid an external shoulder orprojection which. would or might in terfere with the removal of the can from the receptacle in which it is packed with ice, may serve as a gage for positioning the bottom in the body of the can and as a support for the bottom. The top band 9, which is preferablyformed adjacent its lower edge as shown, with an outwardly projecting bead -11,:to stifi'enthe band and form a chime or shoulder for lifting the can, is fitted and fastened to the outer side of the body 1- with its upper edge even with the upper edge of the body.

Both the reinforcing bands 8 and 9 are preferably fastened to the body 1 by electric spot welding, which is a simpler and cheaper method of fastening than riveting and avoids projecting rivet heads, which are objectlonable in a can or receptacle of this kind. Spot welds fastening the bands to the can body at lnterva s, are indicated at 13 in Figs. 3 and 4.

v The outer exposed edges of the bands 8 and 9 are pressed or forced tightly against the adjoining edges of the can body 1, to close the joints between them and avoid crevices in which dirt or foreign matter can lodge. This also facilitates tinning the rims of the can,

and prevents liquid or moisture from entering between the reinforcing bands 8 and9 and the body 1, and causing rust or corrosion. The edges of the reinforcing bands and body are preferably forced tightly together and rounded by means of rolls 15, formed'with peripheral grooves having outwardly diverging sides, as shown in Fig. 4. Thus rolling or pressing together and rounding the edges of the reinforcing bands and adjoining edges of the can body removes any burr, fins or sharp edges on the rims of the cans, and gives them smooth rounded surfaces which are convenient for handling as well as for tinning.

For use in connection with milk or cream products, the can or receptacle, after it has een completely formed as hereinbefore explained, is tinned, and may be easily re-tinned when it becomes worn or battered, since in the construction of the can or receptacle no solder is used, and the canor receptacle has a;

smooth continuous surface both inside and outside, over which the tin will freely and evenly flow or spread.

Various modifications in the order of performing the operations or steps constituting the process and in the construction of the can or receptacle, may be made, without departing from the spirit and scope of the invention as defined in the following claims. For example, the reinforcing bands 8 and 9, or either of them, particularly the band 8, may be fitted and fastened in the body before the bottom is inserted and fused thereto, and

different means may be employed for welding or fusin the bottom to the body, fastening the rein orcing bands thereto, pressing the adjoining edges of the bands and body together to close the joints between them, and rounding or finishing the rims.

I claim:

1. The process of making metallic receptacleswhich consists in fitting an upwardly flanged bottom in a body, and fusing the margin of the flange of the bottom to the interior of the body above the lower endthereof so as to form a substantially continuous interior surface between the body and bottom along and adjacent the zone of union.

2. The process of making metallic receptacles which consists in fitting an interiorly concave bottom in a cylindrical body, fusing theupturned edge of the bottom to the interior of the body above the lower end thereof, and removing burr left by fusing to form a smooth interior surface along and adjacent the zone of union between the bottom and the body.

3. The process of making metallic receptacles which consists in fitting an upwardly flanged concave sheet metal bottom in a cylindrical sheet metal body, fusing the upturned edge of the bottom to the interior of the body above the lower end thereof, to form a continuous interior surface between the bot-tom and the body, and finally plating the receptacle with a'protective metal.

l. A metallic receptacle comprising a cylindrical sheet metal body, an upwardly flanged interiorly concave sheet metal bottom fitted in the body above its lower end and a weld for securing said bottom to said body and for forming therewith a continuous in terior surface.

5. A metallic rece tacle comprising a one piece cylindrical bo y and a bottom located entirely within the body adjacent its lower end, and having an upwardly extending marginal'fiange Welded to and merging into the inner periphery of the body around a portion thereof located adjacent to but spaced from its lower end.

6. A metallic receptacle comprising a hollow metal oody made up of a single piece of metal, and a bottom constituted of a single piece of metal and of concave shape on its upper side,the upper edge portion of the bottom merging into the inner periphery of the body around a portion thereof located adjacent to but spaced from the lower end of the body, and a weld uniting the upper marginal portion of the bottom with the interior of the body around a portion of the body located adjacent to but spaced from the lower end of the same.

7 A-metallic receptacle comprising a hollow metal body, a bottom fitting within the body and having an upwardly-extending margin merging into the inner periphery of the body above the lower end thereof, a weld between the upper-marginal portion of the bottom and the mterior of the body, and a reinforcing band separate from the bottom and fitted within and secured to the lower end of the body justbelow the bottom and adapted to reinforce and strengthen the lower end of the body and also adapted to serve as a gage and support for the bottom during the welding, thereof to the body.

.8. The method of making metallic receptacles which consists in fastening a bottom ina-cylindrical shell at a point intermediate the ends of said shell, securing a ring in the shell below the bottom with Its outer edge aligned with the edge of the shell and rolling the aligned edges of the ring and shell to close the joint therebetween and to form a smooth r1111.

7 9. The methodof making metallicreceptacles which consists in securing a bottom to a ciylindrical shell at a point intermediate itsen s, securing a pair of rings to said shell, one on the inside of said shell below said bottom and the other on the outside of said 5 shell near the top and rolling the edges of the shell and rin s to close the joints therebetween and to erm smooth rims.

In witness whereof I hereto aflix my signature.

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