US1665602A - Jar top - Google Patents

Description

April 10, 1928.

- N. G. NETHERLAND JAR TOP Filed NOV. 13, 1926 SHAW/Vito! G. Feflwrland enema A t. 10, 1928.

PATENT ornce.

RITA. G. KETHEBLAND, OI BALLSVILLE, VIRGINIA.

JAB TOR;

Application filed November This invention relates to improvements in screw jar tops and has for an object to provide such a top, adapted to be used with jars of a popular type having a top which carries a a screw thread, which is cheap to Jnanufacture, may be.easily gripped to turn when being applied to or removed from such a jar, and which has certain advantages pe-. culiar to its construction which enable it to securely grasp the threads of the jar after being seated.

A further object is to provide in such a jar top novel features in the formation of the screw-thread-carrying skirt portion to the end that even when most firmly seated the top maybe readily started from such position, each successive impulse of turning momentarily loosening the threads so that the friction between the threads of the top and the threads of the jar is decreased during the turnin impulse. v

A further 0 ject is to provide a jar top having these advantages'with the additional advanta e of the lip portion contacting with the usual rubber jar ring, the lip portion being associatedvwith the resilient skirt portion in such manner that while the top is being turned friction between the lip and jar rubber is lessened; but when the movement of turning ceases,as when the top is screwed down against the jar rubber, the resilient skirt members being drawn together by their novel structure wedge against the rubber ring and form. an eflicient seal. With hese and other objects in view as may becomeapparent from the following disclosure, the invention consists in the novel combination of elements, construction and arrangement of parts, operation and specific features to be hereinafter enlarged upon, and recited in" the subjoined claims, the invention being'illustrated in the accom panying drawings, wherein Figure 1 is a accordance with my invention:

Figure 2 is an elevation: Figure 3 is a plan section: Figure 4 is a fragmentary section taken on a plane vertical to the plane of Fig; 3:

Figure 5 is a section of another form: Figure 6 is a section of still another modified orm: Figure 7 is fragmentary plan of Fig.

F1gure8 is' a. plan in section of still- 5 another form: and

i Figure!) anillustration of one method plan; of a jar top made in 13,1926. Serial in. learn.

of using the intermediate resilient or humped portions of the top as a grip for fingers or tool in assisting turning of the jar top.

Referring to the drawings A represents a popular form of preserving jar, and B a metallic top. The skirt the 'usual screw thread 5 adapted to coact with the screw threads 6 formed on the top edge of the jar.

The. skirt portion comprises a pluralitrv of arcuate sections, three such sections X, and Z, being illustrated. Intermediate these sections are humped portions 7, 8, and -9, as shown in Figures 1, 3, and 8. These may be of varying form in section as illustrated, and when most tightly crimped as in the forms 8 and 9, are best suited to coact with the arcuate sections as will be pointed out.

portion S carries The hump, or crimped portion extends from the plane of the top of the jar top to the plane of the lip 10, as shown in Figure is no contact of the threads, the pressure of the crimped lip against the rubber ring berelied upon to form aseal at this point.

When screwingthe top down upon its seat on the ring pressure appliedtangentially to the jar top to rotate it tends to loosen the grip of the threads of the segment in advance of the crimp so that less effort is required tojturnthe jar top down to its seat.

When pressure is withdrawn from the crimp the segments readjust themselves and i 1 grip the threadsof the top of the jar.

' This tendency of the sklrt to expand when a turning force is applied, causes the lip 1 e r and when the turning force is withdrawn and the skirt gathers itself together, it. further compresses the ring beneath it to wedge it between the lip and the top of the jar, along the extent ofthe are.

and gat-her in the rubber ring,

* :n; other words, when tightenin -gar looseningythe top, the three segmentsof the skirt, joined by the doubled over, or

crimped, knobs, become to a slight extent relatively movable to increase the radius of the skirt at the momentof turning. The

intermediate humped portions are adapted -t0' be gripped to aid in turning the jar top,

only ccrt-ainpossible modifications it-willbe D appreciated that in practice I do not limit myself to such specific details as herein set eee oos forth; but may resort to any practical modifications falling within the scope of the claim.

What I claim is: A screw-jar cover having a 7 comprising" a' plurality of screw. threaded *gripping arcs and a lip, and resilientmeans intermediate said arcsand extending entlrely across the-skirt and 11p, said resilient means being formed by crii nping: portions of-the skirt and lip transversely of the screw threads. r .j '7 In testimony whereof I aflix, my signature.

mm G. NETHERLAND- skirt portion-

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