US1933479A

US1933479A - Metal container

Info

Publication number: US1933479A
Application number: US593915A
Authority: US
Inventors: Alfred L Kronquest
Original assignee: Continental Can Co Inc
Current assignee: Continental Can Co Inc
Priority date: 1932-02-18
Filing date: 1932-02-18
Publication date: 1933-10-31
Anticipated expiration: 1950-10-31

Description

Oct. 31,1933. A. KRONQUEST METAL CONTAINER Filed Feb. 18 1952 Patented Oct. 31, 19 33 t V PATENToFFIcE M TAL CONTAINER Alfred L. Kronquest, Syracuse, N. Y., assignor to Continental Can Company, ,-Inc., New York, N. Y., a corporation of New York Application February 18, 1992. Serial No. 593,915

1 Claim. (01. 220-44 I The invention relates to new and usefulim provements in metal containers which are made easy to open by a tearing strip and which have an'inserted collar in the region of the tearing 5 strip. In containers of this type as now constructed the collar is made a permanent part.

of the can body by shaping the metal of the container collar after the parts are assembled,

by welding, by soldering and by the friction grip 1c of an oversize collar end forced, into the con.-

tainer body. I I

An object of the present invention is to provide a container of the above type wherein the collar may beeasily inserted in the container body either before or after it is flanged and held therein by the frictional grip of a portion of the collar with the container body. I

A further object of the invention is to provide a container of the above type wherein the collar permit an outside slip connection with the endportion released by the removal of the tearing strip and wherein said collar is firmly attached to the container body by an outwardly projecting portion of the collar having frictional gripping contact with the inner wall of the container body. I I A still further object of the invention is to provide a container of the above type wherein the container body is provided with an inwardly projecting portion having sealing gripping contact with the lower edge portion of the collar;

These and other objects will in part be obvious and will in part be hereinafter fully disclosed. In the drawing which shows by way of illus- I tration one embodiment of the invention:

Figure 1 is a vertical section through the upper portion of the container embodying the improvements.

Figure 2 is a vertical section on an enlarged scale through the upper portion and at one side of the container.

Figure 3 is a view partly in plan andpartly in section of'a portion of a collar to be inserted in thecontainer. I I v Figure 4 is a view similar to Figure 3, but showing the collar providedwith an outwardly extending portion dimensioned to contact with the innerwall of the container.

I in the flanged body of the container.

Figure 6 is a similar view but showing the collar partly inserted in the body of the container before it is flanged. I I

Figure 7 is a .view in vertical section showing the collar fully seated in the container and the container flanged-for receiving the end closure whichis to be joined thereto. M y, I

The invention has to do with a container which is made easy to open by a tearing strip formed is spaced from the inner wall of thecontainer to Figure 5 is a view of the collarpartly inserted can body. I

byscoring the metal of the body adjacentone end of the container. Within the container is a collar which is located in the region of the tearing strip, which collar is a permanent .part of the container body left after the tearing strip is removed and serves to cover the lower raw edge of metal formed by the removal of the tearing strip.

The invention has particularly to do with the construction of the collar and the manner of permanently securing said collar with the container body. Thecollar is of considerably less diameter than; the container body so that it maybe easily inserted therein. The collar may be formed by drawing the metal of a blank so as to produce a seamless collar, or it may be formed from a strip'the ends of which joined to forma cylindrical collar. At the upper edge the collar. is rolled into abead for concealing the raw edge of the metal and for strengthening and rounding up the collar. 7

Intermediate the upper andloweredges of the collar a bead is formed in the collar preferably by the use of dies so as to provide an outwardly projectingportion of a uniform diameter which is to'contact with the'body of the can for holding the collar in place. This collar is inserted inthe can body either before or after it is flanged, and the outwardly projecting portion of the collar is so dimensioned that it will make a very tight friction grip with the inner face of the body of the container. The body wall of the container is also preferably provided with abead which projects inwardly and which is so disposed that the lower edge portion of the collar contacting therewith will not only be gripped, but will have a tight sealing engagement with the wall of the container body, preventing the material within thecontainer' from passing into the space between the collar and the container body. v 7

Referring more in detail to the drawing, the container body which is indicated at 1' is of the usual construction. It is preferably cylindrical in'shape and provided with a side seam indicated at 2, which may be a lap seam or a lock and lap seam, but preferably a scam in the region ofvthe The collar 4 as shown inFig. 3 is cylindrical in shape andis' rolled at the upper edge thereof as indicated at 5 for the purpose of concealing the upper raw edge of the collar and for strengthening androunding up the collar.

by a'solder bond, orotherwise joined. The collar The collar may 7 p be made by drawing the metal from a blank so as to provide a seamless collar, or it may be made .from a'strip with the ends lapped and connected I v of the container.

projecting bead 6, intermediate the upper and lower edges of the collar. This bead is preferably formed by dies so that the extreme outer.

portion thereof will be of uniform diameter throughout and so dimensioned. relative to the inner diameter of the container body as to have a tight frictional gripping contact therewith. The portion 7 of the collar beneath the bead 6 is, of course, of the same outsidev diameter as the portion 8 of the collar above the bead. The collar may be inserted in the can body after it is flanged, as indicated in Fig. 5, where the flange is shown ate, or it may be inserted in the can bodybefore it is flanged, as shown in Fig. 6. The lower edge'portion of the collar is of consider-= ably smaller diameter than the inner diameter Furthermore, the collar after it is provided with the bead 6 is not only symmetrical relative to the center of the collar, but will be maintained in this rounded condition so that it is only necessary to align the collar with the container bodywhic'n has been rounded up and the portion? of the collar may be readily slipped into the mouth of the container. As noted, this can be accomplished whether the container has been flanged or has not been flanged; In either case it is only necessary to apply pressure against the outer curled edge portion 5 of the collar for forcing the collar into the con tainer.

The beadli is dimensioned so that it is slightly 3 oversize or larger in its extreme outer diameter than the inner diameter of the container. The rounded face of the lower side of the bead will expand the container or the metal of the head will yield to permit the collar to enter the container and havea very frictional gripon the container throughout the region of the bead 6. This is a line gripping contact which may be made much, firmer, yielding to any irregularlties in the surface of the metal than can be accomplished by an extended frictional contact lengthwise of the container. Furthermore, the bead will grip the container uniformly throughout the entire circumference of the bead. When the can body is'flanged before the collar is in-- sorted, the collar is forced into the container body until the extreme outer portion of the curled edge?) is slightly below the flange 9 as indicated in Fig. 7 of the drawing.

When the container body, as shown in Fig. 6. is not flanged, the collar is forced into the con-- tainer body by the flanging die which simultaneously rolls the edge portion of the container body into a flange and seats the collar in a predetermined relation to the flange. This method of seating thecollar and flanging the container body at thesarne time, forms the subject mat-. ter of a co-pending application, Serial No. 593,916, filed of even date herewith.

In either case when the collar is fully seated in the can body the lower edge 1% of the collar engages the head 3 on the container body which is so dimensioned as to bring about a very tight frictional grip bewteen the bead and this lower edge portion of the collar; Thus it is that the bead 3 with its frictional grip on the collar aids in the permanent attachment of the collar to the container body. Furthermore; the lower edge 10 of the collar terminates substantially at the crown of the inwardly projecting bead 3. This.

seals the connection between the collar and the container body so that the material will pass through the collar in the emptying of the container and will not pass back of the collar and be discharged over the raw edge of the metal at the lower score line. The bead on the collar 6 also has a line sealing contact with the con-' tainer body which will prevent discharge of the be discharged through the collar.

By making the collar smaller than the container body a space is provided; between the portion 8 of the collar and the body wall for anout side slip reclosure. In the present embodiment.

of the invention the end 11 is provided with a; de

pending collar 12; This is formed by drawing,

themetal of the end so as to produce from the end a folded back portion of metal, producing a collar with a smooth lower edge. The end 11 is secured to the body as shown in the draw ing by a double seam 13. It will be understood, however, that any form of hermetic seam may be used for joining the end to the body. It will also be understood that the outside slip reclosure may be made by placing the upperscore line, which is indicated atl l, at afarther distance below the double seam} thus leaving a depending collar formed from the body wall of thecontainer. In this case the end 11 would not have the integral depending collar l2. The lower score line is indicated at 15 and is above the crown of the bead 6 of the collar so that when the tearing strip is removed, the gripping contact of the collar with the container body is not disturbed. It is obvious that minor changes in the 'sh ap ingofthe parts and in the details of construction may be made without departing from the spirit of the invention as set forth in the appended claim. A V

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

an easy opening container comprising a body having ends secured thereto, said body having spaced scorelinesiat one end thereof forming a its said collar is inserted in said container,-th up- 1 per portion thereof will be spaced away from" the body of the container, said collar having an out wardly projecting portion intermediate the upper lower, edges thereof dimensioned and positioned so asto have a gripping sealing co'n tact with the wall of the container adjacent and below lower score line, said container body having an inwardly projecting portion below said lower score line contacting with the extreme lowor edge of the collar, said collar at the upper end thereof being rolled inwardly to form a strengthening head, said container end having means lying between'a tearing stripand the up: per portion of the collar and contacting wanna body wall of" the container and the outer wall i I of the collar for aiding in the removing of the tearing strip and also serving as an outside slip reclosure for the container when the tearing strip is removed' ALFRED L. KRoNQUE'sT."