US1520250A - Removable cap for containers - Google Patents

Description

Dec. 28, 1 24 1,520,250

D. M. "KERR REMOVABLE CAP FOR CONTAINERS Filed NQL: 20, 1920 i9 Q aw'oenmtoz- WM LMWM MM, 3 M GHCOTATIQJLDAM Patented Dec. 23, 1924.

DUNCAN MACMILLAN KERR, OF PALMERTON, PENNSYLVANIA.

REMOVABLE CAP FOR CONTAINERS.

Application filed November 20, 1920. Serial No. 425,305.

To (.171 'Ie/wm it may concern:

Be it known that I, DUNCAN M. KERR, a citizen of the United States of America, and a resident of Palmerton, county of Carbon, and State .of Pennsylvania, have invented certain new and useful Improvements in Removable Caps for Containers, of which the followingis a specification, rcference being had to the accompanying drawings, forming a part thereof.

My invention relates to caps or seals for containers and has special reference to replaceable ca s for flexible tubes such as are common y employed to contain tooth paste, shaving cream, glue, library paste, and other viscous fluids.

One object of my invention is to provide a particularly simple and improved cap or seal of the character above indicated, that shall be more readily removable and replaceable than the screw caps such as are almost universally employed.

More specifically, it has been my aim to provide a cap or seal which may be manufactured in large quantities at very small expense, and which may instantly be snapped on and off by an action comparable to that of opening and closing a button clasp.

The disadvantages of the usual screw cap are well known and it is only necessary to mention some of them as follows:

1. They are a constant source of annoyance on account of the threads becoming easily crossed or stripped.

2. The trouble and care necessary to adjust it properly is such that the cap is usually merely placed at the end of the tube instead of being screwed down and is soon lost.

I am of course aware that crimped metal seals have been provided for glass bottles and similar containers, but they require the use of a special tool or implement for their removal and are frequently damaged in removal, so that they will not stay on if attempt is made to replace them.

In order that my invention may he tho-roughly understood, I will now proceed todescribe the same in the following specification, and will then point out the novel features thereof in appended claims.

Referring to the drawings:

Figure 1 is an elevation of a tube equipped with a cap which constitutes one embodiment of my invention,

Figure 2 is anend view of the tube, includding the cap, drawn to a larger. scale, an

Figure 3 is a longitudinal section showing the outlet end of the tubing and the cooperating cap in detail.

A modified structure which also constitutes an embodiment of my invention is shown in Figures 4 and 5, which correspond respectively to Figures 2 and 3.

Figure 6 is a detail view of the spring employed in the construction of Figures 4 and 5.

Special reference will first be had to Figures 1, 2 and 3 in which 10 designates a flexible tube of ordinary construction having atubular outlet projection 11, terminating in an end wall 12, equipped with a perforation 13 of rectangular or other suitable shape, through which the viscous fluid contained in the tube is extruded.

A cap 14' is formed to fit onto the end of the tubular member 11, which is provided with a bead or flange 15, and the cap is provided with an internal recess 16 forming a pocket in which a spring 17 is disposed. The spring may be of any suitable form, but I prefer to use that illustrated in Figure 2 which consists of a semi-circular body with S-shaped ends, which tend to press inwardly toward each other and are adapted to engage on opposite sides of the neck 11.

The arrangement of parts is such that it is only necessary to push the cap onto the end of the tube for the spring to snap past the bead 15 and hold the cap firmly in place, pressing the cap'washer 18 tightly over the opening. In utilizing the tube it is only necessary to pull the cap off and after'use it can be as' easily replaced by merely pressing it on the end of the projection 11. The action is comparable to that of a button clasp which is so universally utilized in other industries.

Referring to F igures 4, 5 and 6, in which corresponding parts are designated with the same reference characters, the formation of the tube is the same as before, thecap is slightlv modified to receive a simple spring 19 in the form of an interrupted ring. The

.spring is put under compression slightly while it is being introducedinto the groove or slot 20 of the can 21. which corresponds to the internally formed recess 16 of the cap 14;, and consequently it will not fall out. Nevertheless, it is so proportioned as to be expanded slightly when.the cap is forced either on or off.

Thebead or flange 15 is formed in each instance so as not only to hold the cap from coming off, but also so as to create a spring action tending to pull the cap on and to compress the washer 18, thus preventing leakage.

' Other modifications may be effected within the spirit and scope of my invention, and I desire only such limitations be imposed as are indicated in the appended claims.

What I claim is:

1. The combination with a container having an annular bead of a torus formation, of a cap having an internally formed 'annular spring pocket near its edge, and a spring therein adapted to snap over the beaded end of the container when the cap is placed in position or removed.

2. The combination With a container hav ing an annular bead of a torus formation, of a cap having an internally formed annular spring pocket near its edge, and a spring therein comprising an interrupted ring adapted to snap over the beaded end of the container when the cap is placed in position or removed.

3. The combination with a container having an annular bead of a torus formation, of a cap having an internally formed annular spring pocket near its edge, and a spring therein comprising an interrupted ring with its ends formed with S-shaped bends which are adapted to snap over the beaded end of the container when the cap is placed in position or removed.

.In witness whereof, I have hereunto set my hand this 15th day of November, 1920.

D. MACMILLAN KERR.

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