US2063157A - Metal closure for bottles and jars - Google Patents

Description

Dec. 8, 1936. D AY 2,063,157-

METAL CLOSURE FOR BOTTLES AND JARS Fi led June 15, 1955 Juventot fiarzz'l M Gray Patented Dec. 8, 1936 UNITED STATES PATENT OFFICE METAL CLOSURE FOR BOTTLES AND JARS Application June 15, 1933, Serial No. 676,013

3 Claims.

The invention relates to metal closures for bottles, jars and the like, and one of 'the objects of the invention is to provide such a closure in which the skirt thereof has a smooth exterior surface, unmarred by the appearance of any container attaching means, whereby the metal closure simulates a closure molded from plastic material.

Another object of the invention is to provide a closure having the above-mentioned characteristics, which is made of a single piece of sheet metal.

Another object of the invention is to provide a closure of this character which will be very inexpensive in manufacture, and yet which will produce an efficient seal.

A further object of the invention resides in the provision of a finish for containers which is particularly adapted to use with the closure shown herein, although the finish is adapted to use with other closures.

Numerous other advantages will be apparent to those skilled in the art, from the following description taken in connection with the accompanying drawings; in which,

Figure l is a vertical sectional view of a cylindrical shell.

Figure 2 is a view similar to Figure 1 but showing the closure in its completed form.

Figure 3 is a bottom plan view of the closure of Figure 2.

Figure 4 is a vertical sectional view through a slightly modified construction.

Figure 5 is a plan view of a jar embodying a finish particularly designed for use with the closures of Figures 2, 3 and 4; and,

Figure 6 is a fragmentary side elevational view, partly in section, of the jar of Figure 5.

Referring to the drawing in detail, numeral 6 indicates a shell having a depending skirt 1. This skirt is provided with four cut-out portions 2, spaced apart, in the specific form illustrated. Extending upwardly from each end of each cutout portion 2 is a slit 3 for a purpose which will presently appear. The cut-out portions 2 and slits 3 provide flanges 4 and tongues 5.

The shells of the construction described above are fed to a machine which inwardly curls the flanges 4 to provide the four bead sections 8, shown in Figures 2 and 3. At the same time the tongues 5 are bent inwardly and upwardly substantially flat against the inner face of the skirt 1, as indicated at 9. These upwardly bent tongues give substantially the same rounded appearance to the lower edge of the skirt as do the incurled beads, and at the same time they provide spaces between the bead sections for the passage of lugs on the receptacle when the closure is applied to the receptacle.

In the modified construction of closure shown in Figure 4 an additional step is employed in forming the locking lugs, namely the pressing of the bead sections into substantially rectangular form in cross-section. This additional step provides a flat surface 10 on the beads, instead of a rounded surface, with which to engage the lugs on the container. It will be understood that this flattening of a portion of the beads is not essential, although it is desirable in some instances.

It is to be noted that in both forms of closures above described the attaching means for cooperation with the finish of the jar is disposed entirely within the closure and above the lower edge of the skirt. It will also be noted that the lower edge of the skirt is rounded throughout, thereby giving added strength and avoiding undesirable raw edges. Moreover, the attaching means is formed without marring in any way the skirt proper, thereby leaving the skirt in its original smooth condition in simulation of a molded cap. Any preferred type of liner may, of course, be employed with either form of closure.

In the specific form illustrated, four bead sections with ,four'spaces therebetween for passing over the lugs on the glass finish, are shown; but it will be understoodthat two, three or any other desired number of bead sections with an equivalent number of spaces therebetween, may be employed. r

In Figures 5 and 6 is shown a jar ll provided with a finish adapted for use with the closures shown in 'Figures 2, 3 and 4. The finish comprises four downwardly-inclined lugs l2 and a stop lug l3. The lugs l2 are preferably curved longitudinally to provide the desired gradual pull on the closure as it approaches sealing position. In transverse section, the lugs instead of having the conventional semi-circular shape, have a substantially fiat under side, thereby providing a greater tolerance between the diameter of the cap and the diameter of the glass finish, as well as providing greater downward sealing pressure.

The lug 13 serves as a stop to engage the forward end of one of the bead sections 8 when the closure reaches sealing position and thus limits therotative movement of the cap.

From the above description and attached drawing it will be apparent to those skilled in the art that I have deviseda metal cap having strong and durable attaching means by which it may be secured. to a receptacle; that the attaching means are so designed and constructed as to be entirely concealed from exterior view and to avoid any marring whatever of the exterior surface of the closure; and that the finish of the jar combines with the construction of the closure in providing an excellent seal.

In accordance with the patent statutes, I have described the preferred forms of the invention but obviously various changes and modifications may be made in the construction without departthroughout, an incurled bead formed at the lower edge of the skirt, said bead being formed in a plurality oi spaced sections, each section constituting a lug for securing the closure on a container, and a. tongue of a single thickness bent upwardly and inwardly flat against the inner face of the skirt at'the spaces between the bead sections.

3. In combination, a jar including a plurality of downwardly inclined lugs spaced about its mouth, a stop lug positioned adjacent to but spaced from the lower end of one of said downwardly inclined lugs, and a closure comprising a top and a skirt, a plurality of incurled bead sections formed on the edge of the skirt and adapted -to cooperate with the downwardly inclined lugs,

said bead sections being of .suflicient length to span the space between the inclined lug and the stop lug, and the end of one of the bead sections adapted to engage the stop lug while it remains in cooperative relation with the inclined lug.

DANIEL M. GRAY.

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