US1239299A - Jar-closure. - Google Patents

Description

nrnrion.

oHARLEs o. PARKER,` 0E BALTIMORE, MARYLAND.` i

JAB-cnosuRE. Y

Application filed February 11, 1916. Serial No. 77,556. f

To all whom t may concern:

Beit known that I, CHARLES C. PARKER,

a citizen of the United States of America,

This invention relates to certain improve-- ments in the jar-closure shown and described in Letters Patent No. 1,135,713 granted to me on the 13th day of April in the year 1915, to which reference should be made; and it consists principally in a hollow diametrically contractible plug or stopper of peculiar construction2 adapted to be forced into the throat of a jar, and provided with a cap which rests upon and extends over the exterior lip of the jar, as will hereinafter fully appear.

In the further description of the said 1nvention which follows, reference is made to the accompanying drawing forming a part hereof, and in which Figure 1 is a vertical central section of the upper portion of a jar to which the improved closure is applied, and Fig. 2 a top view of the same. Fig. 3 is an underside view of Fig. 2, and Fig. a an enlarged sectional view of a part of Fig. 1. Fig. 5 illustrates a. different application of the closure,

and Fig. 6 an enlarged sectional view of a part of Fig. 5.

Referring now to Figs. 1 to 4 inclusive, of the drawing, 1 represents the head of a jar, and an annular seat within the throat 3 of the same.

The closure consists of an inverted cupshaped plug, having a fiat crown a and a. skirt Z) which is provided with an upwardly and outwardly extending flange c wherebya contractible circular edge is produced, adapted to fit closely against the inner surface of the throat of the jar; combined with a cap lV which covers the exterior lip e of the jar. These parts are secured together preferably by means of staples f and g as shown in the drawing.

To fully understand the advantage of a cup-shaped plug provided with an upturned flange as described, over a flat disk, as a device to close the mouth or throat of a jar, and produce a. practically liquid-tight joint, it must be borne in mind that a flat disk of pulp board or some similar material, has only a slight diametric compressibility, and is therefore unfitted for use should the disk be applied to a jar havinga' throat of less than the standard dianietric size# f 1 In the cup-shaped plug, its skirt has a certain diainetric compressibili'ty independently of the crown a from which it depends; and when its edge is provided with the upturned flange c which is susceptibleto diametric contraction independently of the skirt, the coinpressibility of the plug is increased, and to such an extent that it is adapted as a closure for jars the throats of which differ considerably in size, and a close or liquid-tight joint thereby produced.

Vhile a stopper constructed as described is well adapted for the purpose in view, I now find it desirable to increase the diametric flexibility of the upturned flange c without correspondingly increasing the iiexibility of the skirt. To this end, I increase the diameter of the circular flat blank from which the plug is formed, and provide the Specification of Letters Patent. y, .'Ptjlieljlii'ed Sept. 4,`1917.5 Y

skirt b at its junction with the upturned y ange c with a crimp or annular open crease 7L, which is slightly closed as the plug is forced into a jar. y

The construction just described enables me to dis )ense with the reinforce shown and describec in the said patent, which not only simplifies the device, but reduces the amount of stock used in its production, and in consequence its cost. f

In the present invention I provide thel cap cl with a lifting tongue 5 similar to the one shown in the said patent, rwhich was intended to stand slightly above the upper surface of the cap to admit of the insertion of the thumb nail underneath it for unsealing purposes. In practice however, the insertion of the nail was not easily accomplished; and in order to eect a well defined elevation of the tongue I form on the crown a of the plug, and underneath the tongue, a slight bulge t' which serves to lift the tongue and retain it in an elevated condition as shown.

In Fig. 5 the edge of the cap d is shown as inserted in a groove j formed in the lip of a jar or tumbler adapted to hold heated materials such as jelly; and in order that the jar will be hermeticallysealed, I form on the peripheral edge of the cap, after the paraflining operation which renders it water proof, an annular bead 7c of paraffin which upon coming into contact with the heated glass, flows and fills the groove and 4becomes hard as the vessel cools.

e Copies of this patent may be obtained for I claim as my invention 1. A jar closure which consists of'an inverted Cup-shaped plug' or stopper having the skirt thereof provided with an outwardly and upwardly extending Continuous or unbroken creased flange which yproduces a oontraotble circular edge adapted to come in Contact with the inner surface of the throat of the jar, combined with a cap adapted to cover the exterior lip of the jar, and to which the stopper is secured, a raisable tongue on the Cap and a bulge formed on the crown of the plug upon which the tongue reste7 substantially as speoied.

2. A jar closure comprising an inverted cup-shaped plug or stopper having the skirt thereof provided with an outwardly and upwardly extending creased flange, adapted for insertion in the throat of the jar, coinbined with a cap adapted to cover the eX- terior lip of the jar, the edge having an annular bead which is liquefiable by heat, substantially as and for the purpose specified.

CHARLES C. PARKER. Witnesses:

JULIA B. ROBINSON, SARAH C. SCHOTTA.

ve cents each, by addressing the Commissioner of Patents. Washington, D. C.

Images