US2001980A - Closure - Google Patents

Description

Maly 2.1, 1935. E SEXTON 2,001,980

cLosURE Filed Oct. 7, 1951 Patented May 21, 1935 This invention relates to an improved closure for `openings of any size, as from small cans to manhole size or larger. While the invention is capable of embodiment in many materials `and shapes as well as in different sizes, it may be conveniently illustrated as embodied in a nozzle and removable cap suitable for closing tightly a tin can or the ller for an automobile radiator, gasoline tank, etc.

It is an object of the invention to provide a. nozzle which holds a cap tightly and eiciently, has no inward projections to diminish the full opening of the throat of the nozzle, is mechanically strong, and which can be made cheaply. In the tin can industry, cans are made in such large numbers and with such a slender margin of prot, that economy in manufacture is of` prime importance. According to the present invention I have provided a nozzle which is eflicient in operation, which can be rapidly and economically made by automatic machinery, and which is adapted for use in a container for highly volatile liquids which may generate considerable pressures in the container and which require a'gastight closure to prevent escape by evaporation. I have also provided a strong cap for eflicient cooperation with my improved nozzle.

For a more complete understanding ofthe invention, reference may be had to the disclosure thereof in the description which follows, and on the drawing, of which,-

Figure 1 is an elevation of a nozzle embodying the invention. v

Figure 2 is a plan View of the same.

Figure 3 is a section on the line 3-3 of Figure 2.

Figure 4 is an elevation, partly in section, of a cap adapted to cooperate with the nozzle illustrated in Figure 1.

Figure 5 is a fragmentary sectional view of a diierent form of cap.

A nozzle embodying the invention may consist of a neck I having a cylindrical wall which is bent outwardly and downwardly at the top of the neck to form a smo-oth lip II, and a downwardly extending skirt I2 which encircles the upper portion of the neck. At the bottom of the skirt the edge of the materalis rolled into the form of what is known as a false wire edge, as at I3. This greatly strengthens and stiffens the edge of the skirt. Theentire lower edge of the skirt is preferably but not necessarily thus rolled. Portions of the rolled edge I3 are downwardly inclined at a small angle to the horizontal as at I4. At the lower end of the edge I4 is CLosUimA Isaac E. Sexton; Winchester? Mass.Y Y

Application october 7, 1931,*seri'a1'riofs'zggi, 1

3 Chms ,.(Cl. 22040) I v l PAT al more sharply inclined portion I5 Vwhich 'is relatively short ,and which'A terminates in ianf-.up-

wardly inclined portion I6, a part ci which may be attened and pressed in toward the neck, as at I1. The upper end of the portion IS merges with the next successive downwardly inclined portion I4. The flattened portions I'I are adapted to permit the downward passage of lugs 22 projecting inwardly from the skirt 2| of a cap 22 which is adapted to t over the nozzle. When the cap is placed on the nozzle, each lug 20 passes downwardly over a flattened portion I'I, whereupon the cap may be rotated so as to engage the lugs 20 under respective cam portions I4 of the rolled edge of the .skirt` I2. Movement of the lugs 20 along the inclined edge portions I4 as the cap is rotated causes the cap to be drawn down tightly against the lip II. The skirt 2| of the cap is preferably of such a length that when the lugs 26 have reached the position indicated at 23 in Figure 1, where further movement of the lugs is prevented by the portions I5 ofthe edge of the skirt I2, the cap is tightly clamped on the lip II.

In order to provide an effective seal, a suitable gasket 24 may be provided Within the cap to rest directly on the lip Il, this gasket being of any suitable material or materials such as a resilient disk of cork, ber, etc., faced, if desired, with metal foil.

In order to strengthen and stiften the cap 22, the lower edge of the skirt below the lugs 2E! may be rolled into a suitable bead as at 25. This reinforces the lugs 20 and obviates exposed sharp edges. If desired, the bead 25 itself may be dented inwardly as at 26 to form locking lugs to engage under the edges I4.

The nozzle and cap may be made of light weight sheet metal, the rolled edges around the bottom of the skirts adding great strength and stiffness to the portion of the nozzle engaged by the lugs on the cap for clamping the 'cap against the lip II, and to the skirt of the cap. Where a light gauge of sheet metal is used in making the cap, the die which forms the locking lugs 2D will also draw the adjacent portions of the bead 25 upwardly, as shown, thus preventing splitting of the metal in forming the lugs. By flattening portions of the rolled edge of the nozzle skirt, as at I 1, the continuity of this strong rolled edge is unbroken throughout the periphery of its skirt.

While the'invention is illustrated as embodied in a nozzle and cap which are smaller than the body of the can, it is obvious that the end of a cylindrical container can be shaped to embody the invention With a cap extending over the full diameter of the container. It is also evident that the illustrated features of structure which make possible a strong gas-tight closure with thin metal, will all the more strengthen similarly made closures of heavier and stronger materials.

Various modifications and changes may be 'made in the specific embodiment of the invention herein described without departing from the spirit and scope of the invention as defined by the following claims.

I claim:

1. A metal container having a cylindrical wall terminating in a mouth, said wall being formed of sheet metal which is turned outwardly and downwardly at said mouth to form a depending skirt outside of said wall, said skirt being shapedto receive a skirted cap thereon with lugs projecting inwardly, said skirt having lower edge portions curled to form cam surfaces spaced at predetermined distances from said mouth and adapted to be engaged by said lugs.

2. A metal container having a cylindrical Wall with a depending skirt on the outside thereof designed to receive a skirted cap thereon with inwardly projecting lugs, said skirt having its entire lower edge curled, portions of said curled edge being shaped to form cam surfaces to b-e engaged by said lugs, other portions of said curled edge being attened inwardly toward said wall.

3. In combination, a metal container having a cylindrical wall terminating in a circular mouth and a cylindrical skirt extending downwardly from said mouth outside of said wall, said skirt having spaced edge portions turned outwardly to form cam surfaces radially outward of the outer surface of said skirt, and a skirted cap removably mounted over the mouth of said container, said cap having inwardly projecting lugs engaging under said outwardly turned edge portions, the innermost points of said lugs being spaced from the axis of said wall by a distance not less than the'radius of said cylindrical skirt.

ISAAC E. SEXTON.

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