US1312581A - Edward d - Google Patents

Description

E- D,- SCHIVHTT.

MEANS FOR RETAININGGASKETS IN JAR CAPS. APPLICATION FILED MAY I8, 1914.

Patented Aug. 12, 1919.

EDWARD n-scnmmr, or BALTIMORE MENTS, TO .THE AMERICAN rum MARYLAND, A CORPORATION OF DELAWARE.

MEANS FOR RETAINING GASKETS IN JAIRFCAIPS.

To all whom it may concern:

Be it known that I, EDWARD D. SoHMi'rT, a citizen of the United States, residing at Baltimore, State of Maryland, have invented certain new and useful Improvements in Means for Retaining Gaskets in J ar-Caps, of which the following is a specification.

This invention relates to improvements in jar caps.

The first object of the invention is to provide a means for holding the gasket in the closing-member of the cap, whereby the same is rendered substantially an integral part of said cap.

Another object of the invention is to so form the securing rim, that it will have con siderable bearing upon the closing member.

In caps where rubber gaskets are em ployed, it is, due to the inherent characteristics of the rubber, difficult to fit the rubbers so that they will remain in place for any considerable time, or stand the handling to which the caps are subjected-before applying them to the jar. This is due to a great ex tent to the drying and hardening of the rubber, whereby the resiliency of. the rubber is destroyed, which, in turn, destroys the frictional hold.

A further object of the invention is to so form the securing tangs that they will not interfere with the hermetic seal between the gasket and the lip of the jar.

In the drawings-PL Figure 1 is a perspective view of the upper part of a jar with my improved cap secured thereto; p

Fig. 2 is a vertical central section of the cap and part of'the jar, the section of the cap being taken through the tongue or opening lever, the cap being positioned upon the jar preparatory to being seated and locked.

Fig. 3 is a top plan view of the cap;

Fig. 4 is a detail enlarged sectional view showing the position the cap assumes when looked upon the jar; Fig. 5 is a group view of the'parts employed in making up the closing member.

Referring to the drawings, the numeral 1 desi ates the jar, provided with an annular gad 2, the under extreme side thereof providing a locking shoulder 3. The jar is further-"formed with an internal, inclined, annular wall 4.

Specification of Letters Patent.

Patented Aug. 12, 1919..

Application filed May 18, 1914. Serial No. 839,365.

The numeral 5 designates the securing rim which is formed with a channel portion 6, the inner wall of the channel portion being inclined as shown at 7. A flange 8 is provided which is adapted to be crimped or bent into locking engagement with the locking member to be bent into the rubber gasket 12,

as indicated at 13, in Fig. 2. This is suflicient to hold the gasket firmly in the channel 10 of the-closing-member, but the position of the tang is not the final position, because when pressure is applied to the cap, the tangs are brought forcibly against the rounded surface of the bead or lip of the jar, which forces the tangs to approximately the position shown in Fig. 4, the tangs in this operation tending to slide down the curved surface of the bead, bringing the tang in position Where it will not, in any way, interfere with the hermetic seal between the gasket and the lip of the jar. In'making the cap, I preferably provide on the under side of the closing member, a paper disk 14,

whose outer edge 15 is interposed between thegasket and the under side ofthe channel portion of the closing member, so that the paper or other suitable material is also, in the manufacture of the cap, made an integral part thereof. The closing member is wedged into the securing rim and fits therein with suflicient snugness to make said closing member an integral part of the securing rim, for all practical purposes, that is to say, the hold is sufficient to permit the seal. to be handled and shipped without danger of coming apart for it will be understood that in ap lying it to the jar, the whole cap is placed upon the jar, preparatory to the seating and locking operation;

The securing rim corresponds in the main, to the construction shown in my Patent Number 1,07 5,125, dated October 13, the inner inclined wall of the channel portion of vided in the upper surface of the channel portion, the outer ends of which slits being adjacent to the upper ends of slits 17 that are provided in the flange of the cap, as shown in dotted lines, Fig. 1, so that a section of the rim may be torn out to permit the rim to be removed to remove the seal, but this rim differs from that shown in my patent referred to, in that I provide a crescent-shape bearing surface 18 which extends outwardly from the lower edge of the inclined wall and which bears upon the closing member, which bearing diminishes to the points where the opening lever or tongue, joins with the wall, as clearly shown in Fig. 3, the base of the tongue serving as a bearing portion throughout its width. With this arrangement, it will be obvious that while obtaining the bearing surface desired, I diminish the metal between the metal to be torn out between the edges of the base of the opening lever, and the slits 17, thus facilitating the opening operation.

To remove the seal, the operation is the same as that described in the patent referred to, that is to say, the opening lever is rocked upwardly, twisting the metal of the securing rim apart and when the slits 17 are torn into, the lever is further manipulated to tear into the slits or sockets in the side of the flange, when the rim can be readily removed, separating it from the closing member which can thereafter, be readily lifted off.

Having thus fully described my invention, what I claim is 1. A jar cap comprising in part a closing member having a gasket holding channel and adapted for application to a jar having an annular bead or lip, said member being provided with a horizontal upper portion and an outerwall provided at intervals with spurs, a compressible gasket fitting said channel and held against the horizontal portion thereof by the spurs which are primarily bent into the gasket to a comparatively limited extent, but adapted to be forced farther into saidgasket by contact between said spurs and-the upperportion of the lip of the jar, upon the application of force tending to seat the closing member, and means for locking the closing member on the jar.

2. In a jar closure, the combination with a jar formed with an annular head or lip, a cap comprising a closing member having a gasket-holding channel, said channel being formed with a horizontal upper portion, and an outer wall provided at intervals with spurs, a compressible gasket fitting said channel and held against the horizontal portion thereof by the spurs which are primarily and to a limited extent, bent into the outer edge of the gasket, the spurs being adapted to be more firmly seated in the gasket by engagement with the upper edge of the lip when the closing member is forced downwardly, and a securing rim having a channel portion fitting over the channel portion of the closing member, said securing rim being provided with a flange and adapted to be locked upon a suitable external locking surface on the jar.

3. A jar cap comprising a closing member having a gasket-holding channel, a compressible gasket in said channel, a securing rim having a channel portion fitting over the channel portion of the securing member, and provided with an opening lever integral with the lower edge of its inner wall, said securing rim being provided with notches in its upper side and notches in its outer wall adjacent to'the notches in the top of the se- I curing rim, the opening lever being adapted to tear into said notches to rupture the rim to remove the seal, there being a flange on the inner Wall of the securing rim adapted to bear upon the closing member, said flange diminishing in width to points where it joins with the base of the opening lever.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK G. BRERETON, TITIAN W. JoHNsoN.

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