US1231881A - Top and side seal-closure. - Google Patents

Description

C. HAMMER.

TOP AND SIDE SEAL CLOSURE.

APPLICATION FILED MAY 2a. 1916.

Patented July 3, 1917.

5] W00 144501, Charles fiammer CHARLES HAMMER, OF NEW YORK, Y., ASSIGN'OR, BY DIRECT AND MESNE ASSIG-Iil' MENTS, T AMERICAN METAL CAP (30., OF BROOKLYN, NEW YORK.

TOP AND SIDE SEAL-CLOSURE.

To all whom it may concern." v

Be it known that 1, CHARLES HAMMER,

a citizen of the United States, residing at sures, of which the following is a specification.

This invention relates to caps or covers for jars adapted to contain various food articles, wherein it is necessary to provide a hermetic closure, and in which it is customary to effect the closing operation or securement of the closure on the jar, in a closed chamber from which the air has been I withdrawn, to produce what is usually termed a vacuum seal.

' The object of the present invention is to provide a closure of this character that will be securely retained on the jar ,by the engagement between the cap, and the outer cylindrical side of the jar at its upper end; and which closure can be placed on top of the jar and secured there simply by downward pressure 'on top of the cap at its margins; without reformation of the cap flange, and without the employment of any dies or chucks, or any means for bringing the flange portion of the closure into holding engagement withthe jar, but which closure will be secured on the jar simply by a downward pressure on its top. And furthermore, which is accomplished without the use of any special retaining configuration on the outer engaging face of the jar, the jar having merely a cylindrical side wall adjacent the end, that may be made slightly tapering if preferred.

A further object of the invention is to provide a form of closure provided with the friction retaining means, as set forth, which will cause a hermetic seal to be formed between the end portion of the jar and the closure; and which seal will .result from the mere operation of applying downward pressure on the closure'to produce the friction locking engagement thereof.

In the accompanying drawing illustrating embodiments of my invention Figure 1 is a plan view of the closure. Fig. 2 is a vertito cal section at one side of the closure, that rests on top of the jar as first applied. Fig.

3 is a view similar to Fig. 2, but with the closure forced down on the jar to final sealing position. Fig. 4 is a modification of the cap shown in Fig. 1. Fig. 5 shows another form Specification of Letters Patent.

Patented July 3, 1%17.

of cap, as first applied tothe jar; and Fig. 6 shows the cap as shown in Fig. 5, in the final sealing position on the jar.

The closure or cap is made of thin sheet metal, andcomprises a top portion 12-, with a depending flange portion denoted generally by 13. For the purpose of engaging the outer substantially cylindrical wall portion 14 of the jar 15, I provide an inwardly extending rim or head of annular form on the lower portion of the flange. As shown in Fig. 2, the flangeprojects inwardly at 16 at substantially a right angle with the flange portion 13; and thereupon the flange is-extended downwardly at 17 'in a substantially conical form, diverging downwardly. It will be observed that the flange portion 13 above the inwardly extending portion 16, is substantially conical and diverges dowm wardly. Thereby is formeda ledge or shoulder inside of the cap at the wall 16, and this is well adapted to receive and retain the ring washer 18 that is employed in this style of cap; and which is preferably of a special composition somewhat similar to soft rub.- ber. The washer is of considerable depth relative to its width, and practically engages all the inner wall of the conical flange portion 13. Between the diverging wall 13 and the flat top 12 of the cap, is a curved connecting portion 19.

The rim portion 17 is preferably reinforced by suitable means, such ashaving its lower edge turned or rolled outwardly to provide a head 20. But in the modification shown in Fig. ithis bead is omitted and has no reinforcement; the cap being otherwise identical with that described with reference to Fig. 2. y

The jar 15 as shown is provided with its top portion 14: of substantially cylindrical form on the outer wall, and the cap adapted for this size of jar, has an internal diameter at the rim portion 17 adapted to engage the jar at about the middle portion of .the diverging conical wall 17, when the cap is first placed on top of the jar, as indicated in Figs. 2 and 5. Thereupon pressure is applied on top of the jar, and will engage it at the highest part on the curved edge 19, and the cap. is forced downwardly. This will cause a slight expansion of the rim portion 17 because of its reduced diameter at the upper ortion adjacent the shoulder 16, and cause t e rim to have a lochng engagement to expand downwardly to a certain extent; to completely fill and close the space between the outer wall 14- ofthe jar and the walls 13 and 16 of the cap. Theend of the jar will also force the washer material upward to extend over the upper edge of the jar, be-' tween the same and the ro mdedportion19 of the cap, thus forming a top andside seal. By this action the entire space between the side and top of the jar and the adjacent wall of the cap above the rim 17 is filled by the composition washer, as clearly shown in Figs. 3 and 6. But if the jar should have its wall 14 of slightly reduced diameter, it will not have the friction locking engagement with the rim 17. Yet the jar will cause the washer to assume the same shape as shown in Fig. 3, and a top and side seal will still be effected that will securely lock and hold the cap on the jar, and produce a hermetic Seal.

In the modification shownin Figs. 5 and- 6, the cap is formed substantially identical with that of Figs. 2 and 3, except that a slight bead is provided by forcing the lower portion of the conical rim wall 13 outwardly a short distance, ,forming a kind of bead 22, as shown. When the cap of Fig. 5 is forced down on the jar, the washer 18 will be forced outwardly to fill the space in the bead 22, as shown in Fig. 6. The form of cap shown in Fig. 4 will operate in the same manner as the other caps, but does not have the advantage of the reinforcement by the bead 20.

Having thus described my invention, what I claim is 1. A jar closure comprising a circular top with an annular side flange having an upper divergent conical part that connects with the top b an arched upwardly projecting portion, t e flange having a rim extending abruptly inward atv a right angle to the upper conical part and then extending downwardly in a diverging conical form, which rim is adapted to have a friction. locking engagement with a substantially straight walled jar to solely by downward pressure on the top of the closurewithout reformation of the closure,,and a comparatively thin Y gasket of compressible sealing material held in the closure by the rim," which is 'com pressed on application of the closure to entirely fill the space between the jar side and top and the flange side and top portion above the rim.

2. A jar closure comprising a circular top with an annular side flange having an upper divergent conical part that connects with the top by an arched upwardly projecting portion, the flange having a rim extending abruptly inward at a right angle to the upper conical part and then extending downwardly in a diverging conical form with the margin bent outwardly to form a bead, which rim is adapted to have a friction locking engagement with a substantially straight-walled jar top solely by downward pressure on the top-of the closure without reformation of the closure, and a comparatively thin gasket of compressible sealing material held in the closure by the rim, which is compressed on application of the closure to entirely fill the space between the jar side and top and the flange side and top portion above the rim.

' 3. A jar closure comprising a circular top with ainannular side flange having an upper divergent conical part that connects with the top by an' arched upwardly projecting portion, the flange having a rim extending abruptly inward at a right angle to the up per conical part and then extending down wardly in a diverging conical form with the margin bent outwardly to form a bead, which rim is adapted to have a friction locking engagement with a substantially straight-walled jar top solely by downward pressure on the top of the closure without reformation of the closure, the flange being rovided with-an outwardly extending annuar portion adjacent the inwardly project ing rim portion, and a comparatively thin gasket of compressible sealing material held in the closure by the 'frim, which is compressed on application of the closure to entirely fill the space between the jar side and top and the flange side and top portion.

above the rim. Q

' CHARLES HAMMER.

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