US734140A - Cover for jars or analogous vessels. - Google Patents

Description

PATENTED JULY 21;"1'903.

A. L. SCHRAM. COVER POR JARS 0R ANALOGOUS VESSELS.

APPvLIOATIONIII-ED JAN. 24. 1903.

N0 MODEL.

lli

UNITED STATES Patented .my 21, 1903.

` PATENT OFFICE.

COVER FOR JARS OR ANALOGOUS VESSELS.

:.PEGIFICATION forming part of Letters'ratem No. 734,140, dated rdiy 21,1903.

Application filed January 24, 1903. Serial No. 140,372. (No model.)

T0 @ZZ whom t may concern: Y

Beitknown that I, ALEXANDER L. SOHRAM, a subject of the King of Great Britain, residingatWoodstock, in the Province of Ontario and Dominion of Canada, have invented new and useful Improvements in Covers for Jars or Analogous Vessels, of which the following is a specification.

This invention relates to a hermetic closure for fruit and other jars, bottles, or other analogous vessels.

The object of the invention is to provide a cover, top, or cap of simple and inexpensive construction which is complete in itself and is adapted to hermetically close the jar, bottle, or other vessel without the employment of any fastening devices,separate or detached packing-gaskets, or other means which are liable to be detached and lost or broken.

In the accompanying drawings, Figure 1 is a vertical section of a fruit-jar cover embodying the invention. tion of the cover and upper portion of a jar, showing the cover about to be applied to the jar. Fig. 3 isasimilar view showing the cover in sealing or closing position. Fig. 4 is a bottom plan view of the cover, partially broken away to show the air-escape opening in the an- -nular wall of the cover.

Like letters of reference refer to like parts in the several figures.

The cover, top, or cap is of inverted-cup shape having a head A and a circumferential annular wall B, which is preferably vertical, as shown in the drawings. Y

O represents an annular packing gasket or ring of flexible elastic material, preferably rubber, which is permanently secured or attached at its outer edge to the lower portion of the annularwall B of the cover, top, or cap. The packing-gasket is relatively wide and projects inwardly from the annular wall of the cover, top, or cap, being normallysubstantially iiat or horizontal, as shown in Fig. l. The cover, top, or cap is preferably made, by stamping or otherwise, from sheet met-al and is provided at the lower edge of its annular wall with an outwardly-projecting lateral flange D, against the under face of which the packing-gasket is securely held by the inturned outer edge d of the flange, which engages the under face of the gasket. The

Fig. 2 is a vertical sec latter is tightly and permanently clamped or grasped between the lateral iiange and its inturned outer edge. This manner of securing the gasket is desirable, aords a strong durable connection, and lends a neat attaching Aappearance to the cover, top, or cap. The

annular wall of the cover, top, or cap is provided with oue or more air-escape openings, apertures, or passages e, adapted to be closed or sealed by the packinggasket when the cover is in place over the jar.

F represents the upper portion of a fruitjar, other jar, bottle, or analogous vessel, which is provided with a mouth surrounded by a neck or wall over which the cover, top,

or cap is adapted tobe placed and preferably having a horizontal shoulder f at the base of said neck and the usual external lip or bead f at the top of the neck.

When the cover, top, or cap is applied to the jar, the neck 'of the latter engages the packing-gasket, and when the cover is pressed down over the neck the packing-gasket is stretched and turned up between the outer neck of the jar and the annular wall of the cover, being compressed between the latter and lip of the jar. The air-escape opening or passage in the annular wall of the cover is so located that it is not obstructed or closed by the packing gasket until the cover is pressed nearly or completely over the neck of the jar. The air in the neck and cover which is displaced by the downward movement of the cover therefore escapes or passes through the escape opening or passage until the cover nearly or fully reaches its final position. In closing jars iilled with hot material, asin canning fruit and the like, the displacement of the air from the jar and cover will be materially aided by the expansion of the air, which becomes heated from the h eat of the contents of the jar. l W'hen the cover has been forced into place on the jar, as shown in Fig. 3, the inner edge of the gasket is tightly bound or compressed between the annular wall of the cover and the neck of the jar at or above the air-escape opening or passage, so that the latter `is effectually closed or sealed against the entrance of air into the jar. The cover is held securely on the jar both by the external atmospheric pressure on the cover and the -binding action of the IOO gasket between the neck and annular wall of of the cover. While the cover will hold well on the jar the neck of which has a straight outer face and aords a satisfactory closure for many purposes, the cover is preferably employed in connection with jars, bottles, or vessels having external lips at the ends of the necks, for the reason that the elastic packinggasket tends to contract below the lip, and thus adds still further to the effectiveness of the closure, for in canning fruit and the like The steam rising from the hot contents ofthe jar or the expansion of the air remaining in the jar tends to lift or unseat the cover, but the gasket has a sufficiently firm hold beneath the lip of the jar to retain the cover in place. The cover can be removed from the jar by prying up one side thereof su'icient-ly to allow the entrance of air to the jar through the air-escape opening or passage or by introdncing a pointed instrument into the airescape opening or passage and pressing the gasket away from the opening to allow the entrance of air. Y

I claim as my inventionl. A vessel cover, top or cap comprising a head, an annular wall provided with an airescape passage, and a eXible gasket secured to said cover and projecting laterally from said annular wall below said air-escape passage and adapted to extend up between the annular wall and the wall of the vessel and close said air-escape passage in said annular wall of the cover top or cap, substantially as set forth.

2. A vessel cover, top or cap comprising a head, an annular wall adapted to surround the neck of the vessel and provided with an air-escape passage, and a flexible gasket permanently attached to the lower portion of said annular wall and projecting inwardly therefrom and adapted to extend up between said annular wall of the cover and neck of the vessel and close said air-escape passage, substantially as set forth.

3. A vessel cover, top or cap comprising a head, an annular wall adapted to surround the neck of the vessel and provided with an air-escape passage, a lateral flange at the lower edge of said annular wall, and having its outer edge turned inwardly, and an elastic gasket clamped between said ange and its inturned edge and projecting inwardly from said annular wall and adapted to extend up between said annular wall of the cover and the neck of said vessel and close said air-escape opening, substantially as set forth.

4. The combination with a vessel having a neck provided with an external lip, of a cover, top or cap for said vessel comprising a head, an annular wall adapted to surround the neck of said vessel and provided with an air-escape passage, and an elastic gasket secured to said cover and projecting inwardly from said annular wall and adapted to close the space between said lip of the vessel and said annular wall of the cover to prevent the entrance of air to the vessel through said air-escape passage, substantially as set forth.

Witness my hand this 22d day of January, 1903.

ALEXANDER L. SCHRAM.

Witnesses:

HENRY J. FINKLE, MAY E. FIELD.

Images