US2218858A - Sealing ring for containers - Google Patents

Description

Oct. 22, 1940. R. s. ROSENBLOOM 2,213,858

I SEALING RING FOR CONTAINERS Filed Dec. 6, 1939 Patented Oct. 22, 1940 UNITED STATES PATENT OFFICE J 2,218,858 Y SEALING RING For; CONTAINERS Ralph S. Rosenbloom, Chicago, Ill. Application December 6, 1989, Serial n 807,731"

2 Claims. (01. 220-61 This inventionrelates to containers such as, for example, sheet metal pails and kegs or the like, and more particularly to novel means for sealing and closing same.

The primary object of the present invention is to provide a simple and economical sealing ring for containers.

A further object of the present invention is to 'provide a sealing ring which will have a smooth top bearing surface upon which the bottom of another container may be slid to facilitate the stacking thereof.

"A further object of the present invention is to provide a sealing ring of the character described which will have a novel weakened portion adapted to be tornout, thereby breaking said ring when it is desired to open the container towhich said ring is applied.

Still a further object of the present invention is to providea sealing ring of the character described having a weakened portion adapted to be torn out, thereby breaking said ring when it-is desired to open the container to which said ring a curled lip or bead or a false wire edge about the top of the container body, said ring being adapted to be crimped about said lip to seal the cover of said container thereto, said ring having an Opening therein, said crimping serving to cause edges of said opening to gape and extend outwardly from said lip. 1

Still a furtherobject of the present inventio is to provide a device of the character described which .will comprise a sealing ring adapted to be crimped about the lip of a container, said ring having a pair of rows of perforations extending transversely thereof and a gaping slot extending between rows of perforations, said slot being adapted toreceive the end of a lever member which may be operated to tear out that portion of the ring between said rows of perforations.

Still a further object of the present invention isto provide a device of thecharacter described which willbe capable of being quickly and economically applied to containers.

the invention consists in certain novel features of construction, arrangement and combination of parts hereinafter; fully described, illustrated in the accompanying drawing, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of thestructure may be made without departing from the spirit or sacrificingany of the advantages of the invention. w v c For the purpose of facilitating an understandingof my invention, I have illustrated in the accompanying drawing a preferred embodiment thereof, from an inspection of which, when considered in connection with the-following description, my invention, its mode of construction, assembly and operatiornand many of its advantages should bereadily understood andappreciated. 1 1

Referring to the drawing in which the same characters of reference are employed to indicate several figures of the drawing: I

Fig. 1 is an elevational view'of a pail or containerembodying my invention.

Fig.2 is a fragmentary sectional enlarged taken generally alOngthe line 2-2 of Fig. 6.

, Fig. 3 is a view similar to Fig. 2, but showing the sealing ring, gasket and cover member prior tofcrimping of the ring to the container edge.

.Fig. 4 is a plan view of the pail or container in Fig. 1.

Fig. 5 is an elevational view showing how containers are stacked.

Fig. 6 is a fragmentary detailed view showing my invention.

The invention contemplates improvements in the type of sealing ring adapted to be crimped about a cover lip and bead edge of a pail or container with a gasket interposed between the cover lip and the bead to hermetically seal the same. Difficulties have been particularly exview perienced in applications of this type of cover Applicant presents simple and effective means for permitting the removal of the sealing ring. Prior to assembly, the sealing ring is provided with a weakened portion such as, for example, a perforated section having a slot therein. During assembly, while the ring skirt is being crimped in place, an edge of the slot gapes since the crimped operation causes extensive strain on the outer periphery of the ring. The gaping opening provides an insertion point for a screw driver or the like so that simple leverage may be applied to tear out the weakened portion of the ring, break same and thereby enabling the cover to be removed from the pail. The opening means ,being upon the side of the ring, the top thereof may be made smooth to permit sliding of the bottom of another container thereupon and need not extend inwardly any great degree, facilitating thereby stacking of a plurality of containers.

Referring now to specific details, the reference character I0 designates generally a pail or container, such as, for example, a lead or paint keg. The container is provided with a reduced diameter portion II at the bottom thereof adapted to fit into the centrally depressed portion I2 of a cover member I3, permitting stacking of a plurality of containers as shown in Fig. 5.

Said container I0 is provided with the usual bail I4 and is constructed conventionally in all other respects. It is provided at its topmost edge with an outwardly rolled bead or flange I5. A cover member I3 having a centrally depressed, portion I2 and a rolled edge or lip I6 is adapted to be fitted on to the top of the container Ill with the lip I6 overlapping the bead I5 and centrally depressed portion I2 inserted into the body of the container. A gasket ll comprising a hollow rubher or the like ring of tubing is provided between the bead and the lip in order to hermetically seal the same when assembled.

The sealing ring I8 comprises an annular member adapted to rest upon the lip I6 of the cover member, but having no portion thereof extending inwardly as shown at I9, thereby providing smooth and speedy seating of the portion II of another container in the recessed portion I2 in stacking a plurality of said containers.

Prior to assembly, the ring 18 has the crosssectional configuration of a quarter are of a circle with the ends thereof extended downwards and sidewards to form respectively a depending skirtlike portion 20, and the bearing portion referred to above by the reference character I9. The ring I8 is adapted to snugly fit over the cover member I3, with the arcuate portion of the ring fitting over the rolled lip I6 of the cover member l3, as best shown in Fig. 3, the curvature of the lip I6 and that of the arcuate portion of the ring being made to conform throughout the circumference of the cover member. The space now formed between the skirt-like portion 20 and the depressed portion I2 of the cover member, is provided with the rubber gasket Il which firmly fits thereinto and under the lip I6. In its presently described condition, the ring, cover and gasket are held in a firmly assembled condition, thus permitting the same to be handled as a unit and to be shipped with ease since the arrangement facilitates assembly thereof at the place of manufacture of the containers. The consumer receives the entire assembly and the container, and need only fill the container with his commodity and apply the assembled unit to the container in an appropriate manner. When assembled a mechanism is applied to the top of .jected to tensile strain.

will not be in evidence since it is transmitted the container which presses same down by hearing upon the portion I9 of the ring, collapsing and compressing the rubber gasket I1, and the skirt-like portion 20 is crimped around and under the bead I5 fixing the cover upon the container and sealing the same as shown at 2|. Devices capable of performing this type of crimping operation are common as shown for example by United States Patents numbered 1,813,984, 2,017,- 495, 1,834,208, etc.

The ring may be formed as an integral annular member or may be manufactured as indicated in the drawing by bending an appropriately shaped member upon itself and spot welding same in position as indicated at w. At the time of formation of the ring, however, same is pro- Vided with a pair of rows of perforations 22 which are disposed transversely of the ring I8 so that a weakened portion 23 is formed between the rows of perforations 22. This portion can thus be available to be torn out, breaking the ring and permitting the cover member I3 to be pried off. In order to facilitatetearing out the weakened portion 23, it is provided with a circumferential slot or opening 24 which is positioned at the arcuate portion of the ring between the rows of perforations 22 for a purpose to be presently brought out.

When the skirt 20. of the ring I8 is crimped about the bead I5 to form the portion 2| it is obvious that the inner surface of the ring will be subjected to compressive strain transversely thereof, and that the outer surface will be sub- Ordinarily the strain transversely to all parts of the ring. However, at the point where the opening 24 is located, the strain cannot be equalized because of the discontinuation. Hence the strain is localized at the opening, and since it originates below the opening, the lower lip or edge 25 of the opening 24 will have its inner surface highly compressed and its outer surface highly tensed causing the gap shown in the drawing. Added to the above forces is the downward pull caused by the crimping operation itself tending to stretch the skirt portion of the ring and thereby increasing the gap at the unsupported lower edge 25 of the slot or opening 24.

The resulting gap is now such that a tool 26, such as theend of a chisel, screw driver, or the like, may be easily inserted therein and safely jammed under the ring at the weakened portion 23 so that same may be torn out by means of leverage applied to the other end of said tool.

It will be obvious that I have provided a novel sealing ring for containers and the like which may be easily and safely removed with a simple tool in a minimum of time and with a minimum effort, and one which lends itself admirably to accomplishing purposes and objects hereinbefore set forth.

It is believed that my invention, its mode of construction and assembly, and many of its advantages should be readily understood from the foregoing without further description, and it should also be manifest that while a preferred embodiment of the invention has been shown and described for illustrative purposes, the structural details are nevertheless capable of wide variation within the purview of my invention as defined in the appended claims.

What I claim and desire to secure by Letters Patent of the United States is:

1. The combination with a container having a the other end of said body, and an intermediate curved portion joining said flange and vertical portion, said intermediate portion being provided with an elongated substantially rectangular opening, the lower longer edge of said opening being arranged substantially in the line of the juncture of said curved intermediate portion with the said vertical portion, said opening being of such a length that upon the stretching of said vertical portion during the crimping of the same beneath the said rim roll of said container, said edge will be caused to gap, said gapping edge providing a space for the ready insertion of an instrument for the easy breaking oi said ring.

2; The combination with a container having a rim roll and a cover having an annularflange for seating upon said roll, of a sheet metal sealing ring comprising a body having a flange at one end disposed over the flange of the cover, a substantially vertically zdisposed skirt-like portion at the other end of said body, and an intermediate curvedlvportion joining said flange and vertical portiomsaid intermediate portion being provided .with an elongated substantially rectangular opening, the lower longer edgeof said opening being arranged-substantially in the line of the juncture of said curved intermediate portion with the said vertical portion, said opening being of such a length that 'upon' the stretching of said vertical portion during the crimping of the same beneath the said rim roll of said container, said edge will becaused' to gap, said gapping edge providing a space for the ready insertion'of an instrument for the easy breaking of said ring, that portion of the ring within which said rectangular opening is provided being weakened by a pair of transversely arranged spaced rows of perforations, said rows of perforations being substantially in line with the ends of the said rectangular opening.

RALPH s. ROSENBLOOM.

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