US976659A - Jar-seal. - Google Patents

Description

0'. R. KEERAN.

JAR SEAL.

APPLICATION FILED FEB. 5, 1910. I

976,659. Patented Nov. 22, 1910.

awe/Mow I mom CHARLES R. KEERAN, OFBLOOMINGTON, ILLINOIS.

JAR-SEAL.

Specification of Letters Patent.

Patented Nov. 22, 1610.

Application filed February 5, 1910. SeriatNo. 542,184.

To all whom it may concern:

Be it known that I, CHARLES R. KEERAN, a citizen of the United States, residing at Bloomington, in the county of McLean and State of Illinois, have invented newand useful Improvements in Jar-Seals, of which the following is a specification.

This invention relates to bottle or jar seals of the vacuum type, and one of its ebier-ts is to provide a simple, cheap and effective seal of this type which may be applied with ease convenience and facility.

Another object of the invention is to provide a seal which may be held in position either permanently or temporarily until the vacuum is formed by a screw cap or cover of the type commonly employed as a closure for Mason ars.

Still another object ofv the invention is to provide a seal which will be held positively by the cap from slipping laterally on the rim edge of the jar whereby a positive seal. is insured and the necessity of using wide and expensive sealing rings or gaskets obviated.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a vertical section through a screw cap in inverted position with the seal therein ready for application to a Fig. 2 is a similar view, showing the cap and seal applied to a jar. Fig. 3 is a view like Fig. 2, showing a modified form of holding I eferring to the drawing, 1 designates a bottle or jar of that type having its neck portion provided with external screw threads 2 and a plane or flat transverse rim edge 3, which threads are adapted to be engaged by the threaded flange t of a screw cap or cover 5, the jar and cap herein shown being of the well-known Mason type. The cap is provided with a porcelain lining (5 bearing against the inner side of its crown or top wall and spaced at its peripheral edge from the adjacent portion 7 of the flange 4, such space providing an annular intervening recess 8. As shown, the lining 6 projects a little below the portion 7 which is connected with the underlying portion of the flange of the cap by a connecting outwardly and downwardly inclined or beveled portion 9.

The seal embodying my invention comprises a sheet metal disk 10, the body portion of which is of somewhat greater diameter than the diameter of the mouth opening of the jar, so that when in sealing position 1t will project, slightly over upon the rim edge 3. This disk is formed at its outer edge with I an annular olis et portion disposed above the plane thereof, said offset portion forming a V-shaped or tapered rim l1 having a short outer depending vertical flange l2 and a longer inner depending vertical flange 13, the latter connecting the inner inclined walls of said V-shaped rim with the edge of the body of the disk 10. By this construction an annular retaining groove 14 is formed between the flanges 12 and 13 to receive the upper portion of a seallng rlng or gasket 15, which ring or gasket may be made of any suitable elastic material, such as rubber, but is preferably composed of a fibrous material, such as asbestos or blotting paper, combined with a fusible wax, such as ordinary sealing wax, which will melt at .a temperature above nor mal atmosphere temperature. The gasketmay be held within the groove and the disk and gasket so connected in this manner as a complete article of manufacture ready for use.

In employing the invention, the cap or cover 5 may be used for either permanently or temporarily holding the seal in position. i

As a convenient manner of applying the cap and seal, the cap may be inverted, as shown in Fig. 1 and the seal dropped in an inverted position therein. When this is done the beveled outer wall of the rim 11 of the seal will engage the beveled portion 9 of the flange of the cap, which will operate as a guide to bring said rim 11 into engagement therewith and with the adjacent edge of the lining 6, so that the apex of the rim will project slightly into the groove 8, such surfaces of the cap forming a seat for the rim of the seal by which the seal, on ing simply dropped therein, will be auto atically guided into position for application.

to the jar, without care or any specified manipulation on the part of the operator. The cap with the contained seal is then simply turned over to normal position above the mouth of the jar, as shown in Fig. 2, and screwed down upon the same, the bottom face of the gasket 15 being thereby brought to bear against the rim 4 and main; tained in close contact therewith by the pres sure of the cap. If the contents of the jar l lIIPOSitiOIl, by which an hermetic closure will be effected. If, on the other hand, the

contents of the jar are filled in while hot,

. the ;cap' may be heldapplied to the jar to retain the seal in position until the rarefied air in the neck of the jar above the contents is condensed andforms a partial Ivacuum,

' whereby the seal'will', upon the removal of I the cap, be held firmly in position to close the jar by external atmospheric pressure.

Under such conditions, it may be advisable to make the gasket or sealing ring of a fibrous material and wax, as the latter will a be fused by the heat of the contents and thus become cemented to the rim 3, making the seal absolutely proof against leak'a 'e. It will thus be seen that the seal may he employed in connection with an ordinary screw cap to secure a tight closure, inthe event that a vacuum holding action is not desired or cannot be attained, or thatjhc cap maybe used simply as a medium for holding the seal in place until a vacuum is formed. It will be observed that when the cap and seal are laced in position, the seal 'W lll be held agalnst lateral shifting by its 1 receiving seat in the cap and the beveled portion 9, sov that it will be accurately brought into engagement with the rim 3 of the jar, without any further care or atteni tion on the part of the operator other than is required to apply the cap to the jar in the of cap which may be employed if desired,

the said cap having a depressed panel 16 forming the receiving groove '8, the lining 6 being dispensed with, but the construction of the cap being otherwise the same.

Having thus described my invention, I claim i p In [a vacuum jar seal, the combination with a screw cap havin portions forming a retaining recess and eveled guide surfaces leading thereto, of a seal comprising a disk having an oflfset peri heral portion extending from its upper si e, said ofi'set portion bein bent to provide inner and outer parallel anges, conver ing walls above said flanges forming bevele faces to engage the retaining recess and beveled guidm surfaces of the cap, and a seal fitted 1n the CHARLES R. KEERAN.

Witnesses:

BRUCE L. CROSTHWAIT, CLYDE E. SHOPE.

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