US1912266A - Metal container - Google Patents

Description

y 30, 1933- J. J. ENGELMAN 1,912,266

METAL CONTAINER Filed Dec. 1, 1930- 2 Sheets-Sheet l May 30, 1933.

J. J. ENGELMAN I METAL CONTAINER Filed Dec. 1, 1950 2 Sheets-Sheet 2 Patented May 30, 1933 UNITED STATES earner orriee JOSEPH J. ENGELMAN, OF CHICAGO,

ILLINOIS; ASSIGNOR T CONTINENTAL CAN COMPANY, INC., OF NEW' YORK, N. Y., A CORPORATION OF NEW YORK METAL CONTAINER Application filed December 1, 1930. Serial No. 499,366.

'The invention relates to new and useful improvements in metal containers and more particularly to the manner of formlng the seams for joining the parts of the container.

An object of the invention is to provide a container wherein the side seam form ng the body, as well as the end seams o1n1ng the ends to the body, are all formed by an interfolding of the metal parts without the use of '10 any solder bond for joining the parts.

A further object of the invention is to provide a container of the above character wherein a plastic sealing material is lnterfolded with the metal parts so as to hermetically seal all of the seams of the container. In the drawings:

Fig. 1 is a view in side elevation of a container embodying the invention and with parts broken away to show the end seams.

Fig. 2 is a plan view of the same, with parts broken away to show the side seam in section.

3 is a view of the blank as it is notched and shaped for forming the body.

Fig. 4 is an edge view showing the formation of the reverse folds in the body blank preparatory to the uniting of the ends of the blank.

Fig. 5 is a plan view of the blank shown 1n Fig. 4.

Fig. 6 is a detail showing the preliminary interlocking of the parts to form the side seam.

Fig. 7 is a view of the side seam from the inside of the can before the can is flanged.

Fi 8 is a view showing the can body flanged and the cover applied thereto.

Fig. 9 is a sectional view showing the finished end seam.

In carrying out the invent-ion, the body of the container is formed from a metal blank, the ends of which are notched so that the ends of the side seam in the region where the body is to be flanged, will include only a single lapping of the metal parts. One end of the blank is reversely folded inwardly at a distance back from the extreme edge of the blank. This forms a hook with a part extending from the end thereof in a direction parallel with the plane of the blank. The to outer edge of this projecting part is folded back upon itself for a short distance, thus forming oppositely disposed, hooks. The other edge of the blank is likewise formed with a reverse fold forming a hook with an edgeportionjextending therefrom in the general direction of the plane of the blank. This edge portion is not folded back upon itself. When the ends of the blanks are joined the end having the projecting portion, the outer edge of which is unbent, is nested within the portion having the oppositely disposed hooks. The interlocked parts of the side seams are preferably formed on the inside of the can. These interlocking parts are coated with a plastic sealing material and after the parts are interlocked, they are bumped together, thus forming a very tight hermetic side seam. The can body is then flanged, after which the ends are secured thereto by double seaming or interfolding the flange of the end with the flange on the can body. Here again a plastic sealing material is used with the interfolded parts so as to form a hermetic seam.

Referring more in detail to the drawings, the invention is shown as embodied in a container comprising a body portion 1, which is made from a blank 2. The blank is provided with a notch 3 at one end thereof and with spaced notches 4 and 5 forming a tongue 6 therebetween. One end of the blank 2 is provided with a fold? in which the metal is bent back of the blank and a fold 8 in which the metal is bent outwardly awayfrom the body of the blank and providing an edge portion 9. This is a reverse folding of the metal forming a hook 8a and a portion 9 extending therefrom which, in the final interlocking of the edges, is parallel with the plane of the body of the container. The other edge of the blank is bent back upon itself at 10 and thence bent outwardly at 11 forming an extending edge portion 12, the outer part of which is bent backward at 13. This provides a hook in the portion 13 that is adapted to engage the hook 8a when the metal parts of the ends of the blank are interlocked. The projecting portion 9 lies housed within the metal parts at the other end of the blank and preferably extends all the way across and is clamped by the metal parts at the fold 11. As shown in Fig. 6 the portions of the blank are united by these interfolded parts which lie on the inside of the container. One end of the blank is in hooked form and extends about a hook formed in the other blank back from the extreme edge thereof. The inner or housed hook has an extension extending across the meeting. folds 7 and 10 and is clamped between the parts'of the metal forming the fold 11. Some portion of these metal parts are preferably coated with plastic sealing material 14 so that when the parts are interfolded and pressed tightly into contact with each other, a hermetic seam is produced. In Fig. 6 of the drawings the parts are shown as interlocked and partly folded against each other while in Fig. 2 they are forced into intimate contact and the seam is completed.

Theican body formed as above described has the portions thereof beyond the interlocking parts in the side scam in single overlapped relation. In other words, the walls of thebody of the can are substantially in abutted relation and the tongue 6 overlaps the adjacent edges of the body walls. The body thus formed is provided with the usual flan e and the end 16 is secured thereto by a double seam 17. In Fig. 8 of the drawings the flange on the can body 1 is indicated at 19 and the end is provided with a flange curled at 20 to form a channel. A plastic sealing material 18 is preferably placed in this channel on the end and then the parts are rolled together was toform the double seam 17. The lower end 21 is joined to the body 1 of the container by a similar double seam 22. The can as shown in the drawings has a nozzle closed by a screw cap 23 and this nozzle is joined to the end 16 by an interfolding of the parts as indicated at 24:. Here again a plastic sealing material is used so that the entire can is free from any solder bond and may be described as a solderless can. All of the joints are formed by the interfolding of metal parts and when a plastic sealing material is used, each sea-m will be a hermetic seam and the container one that can be hermetically closed.

The side seam joining the ends of the body blank is the particular novel feature in this container. It is a very strong seam in which the interfolded relation of the parts will not be disturbed, even if the container is placed under vacuum or under pressure. A strain on the metal parts tending to separate and break the seam is resisted not only by the interlocked hook portions but also by the 4 extended edge portion which is housed and clamped by the inner fold in the edge portion of the body blank. When the parts are properly bumped together, the folds 7 and 10 on the outer face of the seam are substantially in contact, thus making a container which has practically no projecting side seam and one wherein the decorating or lithographing of the outer face of the container may be practically continuous all the way to the edges of these meeting shoulders. By this interlocking of the metal parts to form a side seam without the use of solder, no heat is necessary to complete the seam and therefore the lacquered metal parts are in no way injured by the forming of the side.

seam.

It will be obvious from the above description of the side seam, that the plate for forming the body may beplain, tinned, coated, lacquered or otherwise prepared from iron or metal alloy, depending upon the requirement of the contents for which the container is made or the desire of the purchaser.

The outer surface of the container may be prepared prior to the forming of the body or after the body is formed and the edges seamed together. I

"While I have shown a container which is rectangular in cross section, with rounded corners, it is understood it may be shaped in any desired way. While I have shown a container having a nozzle, it will be understood this may be omitted and the container closed in any desired way as by attaching one of the ends thereto after the container has been filled with the product to be stored therein. I

. It is also obviousthat minor changes in the shaping and arranging of the'parts of the side seam may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

A container comprising a body portion and ends double seamed thereto, said body portion having the side seam formed by the interlocking of folded edge portions of the body blank, one of said edge portions being folded inwardly away from the centerof' the side seam, thence forwardly toward the center of the side seam and across the same to the opposite side thereof, and thence backwardly and outwardly approximately to the center of the side seam, the other edge portion being folded inwardly and away from the center of the side seam and thence forwardly toward the center of the side seam and across the same to the other side thereof, said folded portions being dimensioned so that the shoulders formed by the first folding of the edge portions of the body blank are adjacent each other and so that said last named folded side portion may be housed within the first named folded side portion and will extend all the way across the side seam contacting at its edge with the first named folded side portion, whereby pressure tending to separate the shoulders or force the shoulders toward each other and unhook the interlocking portions, will be restrained by said interlocking portions and a plastic sealing material within said interlocking portions.

In testimony whereof, I aflix my signature.

JOSEPH J. ENGELMAN.

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