US2037923A - Method of closing metal containers - Google Patents

Description

April 21,. 1936. w F FUN-n1;

I METHOD 0F CLOSlNG METAL CONTA:[NERS original Filed May 2 3, 1932 A .w 1....0 l"

willinpartbeobviousandwillinparti'lehcrein 'i nular depression produces -ing ring and wherein a sealing Patented Apr. 2l, 1936 4 2,031,923 y Marilou or cLosxNc. METAL communs William F. Punte, Syracuse, N. Y., Continental Can Company, In N. Y., a corporation oi New York application May 23, 1932, Serial No. and this application March Original 613,094. Divided assignorto c., New York,l

19. 1935. semi No. 11.35..

1 claim. (ci. 11s-121)v The present invention relates to new and useful improvements in a method of closing metal containers and more particularly to a method of closing metal containers of the type wherein the cover is secured to the container body by a sealgasket is disposed between the` cover and the body portion.

An object of the invention is to provide a method of closing a container ofthe sealing ring type wherein the pressure applied to the sealing ring for deformihg the same and sealing the container may be utilized tor firmly pressing the cover into sealing contact with the gasket and for firmly pressing the gasket into sealing contact with the container'body simultaneously with the deformation of the sealing ring.

The above and other objects of the invention after more fully disclosed.

In the drawing:

' Fig. 1 is a side elevation partly in section showing a metal container of the type referred to.

Fig. 2 is a fragmentary plan view of the same.

Fig. 3 is an enlarged fragmentary vertical section through wthe container and sealing ring showing the parts assembled` prior to the subjection of the sealing ring to die pressure.

Fig. 4 is a view similar to Fig. 3. but 'showing v thesealingringafterpressurehasbeenapplied for closing the container..

It is believed that the improved method o! closing a sealing ring container'will be better understood if such a container ready for closing bytatnhe improvedmethodisiirstdescribedln de The container as illustrated in the accompanyinsdrawing consistsofabodyportionl which is preferably cylindrical and a closing bottomendIwhichissecuredtothebodyportion by double The upper end of the container body is provided with an inturned hollow bead land an annular depression l spaced from the bead 3. The annular depression I is shaped to provide a substantially horizontal holding shoulder 5. The formation of this ana container wherein both ends are of substantially the same diameter. and yet there is provided a locking or holding shoulder I. "nie container is closed by a cover l whichis intheform ofadlscextendingacross the open end of the container and having a depending flange 1. wardly over the body wall of the container ensagins the same so as to provide a frictions! closure. This arrangement of parts produces a the hands in removing the This flangev extends down* cover which lmay be used for reclosing the container after the sealing-ring is removed. 'lhe cover flange 1 is bent outwardly at the upper edge thereof as at B and the closed portion of the cover is curved upwardly as at 8 in order to form a channel or recess above the hollow bead 3 for the sealing material which is in the form of a sealing gasket i0. The lower edge of the cover liange 1 is bent outwardly and then inwardly to form a half bead Il, the inner face of which is substantially in 'line with the inner face of the ilange. 'Ihe half bead Il terminates adJacent but slightly above the holding shoulder i. This bead at the lower end of the cover flange serves to place the sharp edge thereof adjacent the body whereby to prevent any danger of cutting sealing material. It also forms a substantial support for the lower portion ofthe sealing ring to bear against when it is pressed into locking position and thus maintains the wall of the sealing ring substantially parallel with the upper section of the body wall.

The cover is secured to the container body by sealing ring ilwhlch has overlapping ends. one of which is indicated at il. The upper portion of thesealingringisbentinwardlyasatlland overlies the curved portions I and l of the cover. This bent portion inwardly and downwardly-about a shorter radius than the curved portion l of the cover section. The inner edge of this bent portion ll contacts with the curved portion l oi the cover, when applied thereto, at a point well beyond the crown of thejcurved portion. The sealing ring l! is also provided with an inwardly projecting portion l2a at its lower edge which is curved inwardly and upwardly. v j

The above described container forms no part of the present invention, but is shown and described in the copending application of William F. Punte, Serial No.l 613,094, led May 23.11932, of which this application is a division.

In carrying out the invention, the parts are first assembled as shown in Fig. 3. parts thus led, that is, with the upper portion Il of the sealing ringl overlying the cover l and with the lower portion lia of the sealing ring disposed beneath theholding shoulder l, the container is subjected to a closing apparatus in the i'orm of die members. one of which is inidicated at z andthe other at y. These die members :c and y are then moved relatively toward ofthe-sealingringiscurved s With the each other. 'ihe die member r will contact with Il of the sealing ring. This curved portion Il,

which contacts with the cover at a point directly over the inside of thehollow bead 3 on the container body, will be moved inwardly and changed in shape so as to conform more nearly to the curvature of the portion 8 of the cover as shown in Fig. 4. 'I'he lower edge Ila of the sealing ring will be straightened out beneath the holding shoulder l as indicated in Fig. 4. This shortening of the side wall of the sealing ring I2 is accomplished by pressure applied in aV direction parallel with the side wall of the container body. 'I'his pressure is also transmitted against the shoulder l and against the cover, thus tending to move the cover toward the shoulder. This movement will cause the cover to make a very intimate sealing contact with the sealing gasket III, which vin turn will be caused to make a very intimate sealing contact with the hollow bead 3 on the container body. 'Ihe die members x and y include the usual spring means which will only yield when a seal of proper tightness is obtained, and therefore, as the die members move toward each other, the sealing gasket Il will be pressed against the bead 3 and it is only the tightness of the seal which will prevent further movement of the die members relative to each other.

The finally closed container is, as noted above, shown in Fig. 4. The sealing gasket I has been forced into intimate contact with the bead I and into the recess formed between the outer curved portion of the bead and the cmved portion l of the cover. 'I'here is thus formed a tight contact of the sealing gasket with the cover all the way to the inner side of the bead, and there is also formed a tight sealing contact with the bead throughout the upper surface thereof. The metal of the sealing ring is non-elastic, so that, as pressure is applied thereto and the cover is forced into tight sealing contact with the con-'- tainer body, the changing of the shape of the sealing ring will remain in the final shape given thereto by the pressure of the dies. The expansionofthe gasket liisthuslimitedbythe Y the container edge upper and lower portions I4 and Iza respectively of the sealing ring, 4and therefore the cover will beheld in tight sealing contact with the gasket, and the gasket in tight sealing contact with-the bead 3 through this deformation of the sealing ring I2.

It is understood that the cover and sealing ring are applied to the container by the manufacturer, and that the container, after it is filled bythe packer, has' the bottom end 2 double seamed hereto.

While the invention has been described as applied to the clodng of the container shown in detail in the accompanying drawing, that is, one wherein a sealing ring is deformed by pressure to firmly hold the coverin tight sealing engagement with the container body, it will be understood that it may be used in connection with containers of other types. It is essential, however, that the container shall be so constructed that pressure may be applied to a metal part in a direction parallel with the body wall of the container, so that this pressure may be utilised for iirmly pressing the cover against the gasket and the gasket against body during the deformation of ttliielelexrlietalpartsothatatishtsealisthusob- Having thus described claim as new and Patent, isr- A method of closing containers consisting in Shaping the body ci the container so as to provide a rolled bead at the 'upper edge thereof and a shoulder located beneath said bead, applying thereto a closure having a sealing gasket on its inner face, which closure is curved directly above said bead so as to overlie said bead for comthe invention, what I desire to secure by Letters pressing the gasket against the bead, applying to said closure and container body a clamping ring having an inwardly extending flange. at its upper edge normally curved about a shorter radius than the curvature of the closure so that the inner edge of said flange contacts only with said closure, which .clamping ring also. is provided with an inwardly projecting curved flange at its lower a.dapted'lt :o1v overlie said shoulder on the container body. applying pressure to the flanges of the clamping ring in a direction parallel with the body wall for deforming the angesv and clamping the closure to the container body.

WIILIAM F.PUNTE

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