US1244495A - Jar-closure. - Google Patents

Description

C. HAMMER.

JAR CLOSURE.

APPLICATION FILED Nov. Io. I9Is.

Patented 001;. 30, 1917.

] wuawloz Charles Ham mer. attoznm UNITED srATEs PATENT oEEroE.

cHAELEs HAMMER, or UEENs, NEW Yoan, AssIGNoE, BY DIEEcT AND MEsNE ASSIGNMENTS, 'ro AMERICAN METAL CAP co., 0E BROOKLYN, NEW YoEK.

To all whom z't may concern:

Be it known that I, CHARLES HAMMER, a citizen of the United States, residing at Queens, in the county of Queens and State of New York, have invented certain new and useful Improvements in J ar- Closures, of which the following is a specification.

This invention relates to the covers or closures vfor jars, wherein it is necessary to provide a type of hermetic sealof the closure on the top of the jar, to effectually prevent entrance of the air, as well as to retain the contents of the vessel. v

The object of the present invention is to provide a closure that will be securely retained on a jar top that has a ysubstantially straight outer wall, and isnot provided with a Sealing groove and wherein a compressible washer of non-metallic material, 'such as a composition of the nature of rubber, will be strongly compressed between the closure and the jar wall, but without engagement of the closure with the jar.

A further object is to provide such a form of closure that will be secured on the jar by the application .of downward pressure' on the projecting lower portion of the closure that will produce an inwardly projecting annular portion to strongly compress the washer against the jar.

In the accompanying drawing illustrating one embodiment of my invention, Figure l is a top or planview. Fig. 2 shows in vertical section, the closure as applied to the top of a jar; and Fig. 3 is a partial enlarged view of the closure on the jar.

The closure or cap is preferably made of thin reformable sheet metal, and comprises a top central portion 6, preferably flat, that is provided with a ange portion 7 extending downwardly in a slightly divergent coni- Cal form; the flange being connected with the-central portion 6 by an arch portion 8. The iange is bent abruptly outward and upward to form an upwardly facing channel portion 9. The flange is then bent or rolled downwardly and inwardly to form a bead 10 as shown, 'which bead is substantially 'circular in cross 'section and connected with the divergent conical portion 7 by the abrupt bend 9 as clearly set forth in Fig. 2.

A washer is placed inside ofthe flange portion of the closure and is preferably held therein by the bead. As shown, I provide a comparatively thin and at ring washer 12 Specication of Letters iatent.

. Patented Oct. 30, 1917.

Application led November 10, 1916. Serial No. 130,513.

of compressible sealing material, preferably in the nature of a rubber composition. This washer engages the inner Wall of the ange portion 7, and has its lower edge 13 secured inside of the bead 10 as indicated in Fig. 2

whereby the washer is retained in proper `closure it is preferably secured by the use of a head or chuck of annular form, as indicated at 16 in Fig. 2. This chuck member is moved vertically downward relative to the closure and jar, and its curved face 17 will irst engage the upper portion of the bead 10, that will deiect the bead downwardly and inwardly. This will draw the lower portion of the conical flange 7 inward toward the jar wall, and will cause the abrupt bend 9 to project horizontally inward as indicated at 17 in Fig. 3. The upper portion of the curve 17 will engage the flange wall 7 at the latter part of the bending operation and deflect it inwardly, as shown in Fig. 3. This will strongly compress the washer l2 and the bend 9 will project into the washer. The downward pressure will also compress the upper part of the washer and slightly compress it between the top edge 15 of the jar, and the arch portion Spf the closure, as shown in Fig. 3.

By this arrangement-it will be understood that a very tight and strong seal is provided by the compression of the washer from the inwardly projecting bent vportion 9. The washer will extend some distance below this bend, and will have its lower portion between the edge ofthe bead and the jar, and will thus practically protector cover-the metal edge of the bead that is not closed by reason of its holding the washer. The outer wall of the jar top 14 is shown as substantially cylindrical but obviously it might have a slight conical taper, either upwardly or downwardly, yet constitute what is a straight-walled jar top. This term is used to distinguish from said jar or bottle tops walled jar top. Since the metal portion of the closure does not engage the jar, the cap can be removed by inserting a sharp tool into thewasher to pry it oii". By reason l of the yielding nature of the composition washer, and the metal of the closure not engaging the jar wall, considerable variation in size of the jar can be accommodated, as well as unevenness or flaws in such wall, as the composition will be forced into the same and form a hermetic seal.

Having thus described my invention, what I claim is 1. The combination of a jar closure of thin reformable sheet metal composed of a toprand an annular side fiange of slightlyv divergent conical pform, the ange being abruptly bent outward and upward, and

then bent downward and inward into the.

form of a roll or bead that adjoins said abrupt bend, and a comparatively thin and fiat ring washer of compressible sealing material having the lower edge secured in said bead and which extends inward and upward in contact with the inner face of the flange, whereby the insertion into the closure of the jar top with merely downward ressure on the bead portion, will cause the cad antenas to be forced downward and inward an the abrupt bend connecting the bead 1 be caused to project inwardly beyond they reformable sheet metal composed of a to and an annular side liange of slightly d1 vergent conical form that connects with the top byran arched portion adapted to co-act with the rounded top of a jar, the fiange being abruptly bent outward and ,upward and then bent downward and inward into the'form of a roll or bead that adjoins said abrupt bend, and a comparatively thin and Hat ring washer of compressible sealing material having the lower edge secured in saidbead and which extends inward and upward in contact with the inner face of the flange,

whereby the insertion into the closure of the jar top with merely downward pressure on the projecting bead portion, will-cause v

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