US2196877A - Closure - Google Patents

Description

H. SPENGLER April 9, 1940.

CLOSURE Fixed Jan. 27, 1957 2 Sheets-Sheet 1 .I. a N

INVENTOR. i MeY SPE/VGLE'Q m4 4% ATTORNEYS P 1940. H. SPENGLER 77 CLOSURE Filed Jan. 27, 1937 2 Sheets-Sheet 2 ATTORNEYS the "crown Patented Apr. 9, 1940 m Spen ler.

spe m-er New York, N. Y., Cap Corporation,

llinoito New York, N. 2., a

corporation of Delaware Application January 27, 1937, Serial No. 122.630 1 Claim- (01. 215-39) The present invention relates to a closure and it particularly relates to a type of closure to be applied to the mouths of glass bottles, cans, jugs or other containers, the mouths of which are provided with peripheral beads or lips.

In my prior application, Serial No. 72,679, died April 4, 1936, there is disclosed an improved cap construction which is designed to replace the usual type of closure designated as being of type in which old type crown cap the metal of the skirt and the cap is tucked inwardly about the bottle or container mouth while a lower portion of the skirt extends more or less outwardly presenting a sharp edge.

The skirt of the cap of said prior application was provided with an upper or intermediate fold or bulge, the lower portion of said skirt below said i'old or bulge being gathered or crimped.

This fold or bulge was designed to supply extra metal and to be extended or flattened by a cylindrical capping tool which, at the same time, pressed the lower portion of the skirt below the bead of the container, can or bottle, as the case may be.

By so constructing the caps and applying them to containers, it has. been found that the caps more readily adjust'themselves to varying types of beads, even though such beads are slightly ofishape or not truly circular, that breakage or deformation of containers in applying the caps is greatly lessened, that the cap when pressed down upon the bottle seals both the top and the side of the bead, and that a'considerable amount of metal is saved.

It is, therefore, among the objects of the present invention to provide an improved cap of the character described in said prior application which cap may be readily applied and automat-.

ically will adjust itself to the top of the container.

It has further been found that an improved closure is obtained when the cap is drawn down over the top of the beaded mouth of the container and when the metal of the skirt of the cap together with the sealing disk enclosed in the cap have been drawn outwardly over the top of the bead and downwardly over the side of the bead, and it is among the further objects of the present invention to provide an improved cap of this character which will permit of this application to the mouth of the container.

Other objects will be obvious or will appear during the course of the following specification.

In accomplishing these objects. it has been found most suitable to expand the bulge, fold or bend which supplies the extra metal for expansion to seal the top of the bottle so that it will extend over the entire side of the cap above the indentations.

In one form of the invention, the upper por- I tion of the skirt is formed as a i'rustro-conical surface which may be slightly convexed or concaved.

When the cap is applied this surface is preferably substantially spaced from the upper portion 10 of the bead and with the lower corrugated or indented portion of the skirt fitting closely adjacent to and around the maximum diameter of the said bead.

In applying this cap to the beaded mouth of a suitable container, a capping die is preferably provided which will grip and press downwardly upon a portion of the conical surface substantially below the top .of the cap and preferably at a portion intermediate of the bulge or convexity 20 or concavity.

The die then in extending the bulge and in applying the cap will draw the top and sides of the cap outwardly and downwardly over the bead and at the same time will draw the sealing disk 26 enclosed in the cap downwardly over the top and side of said bead.

.As a result a perfect seal will be formed not only on the top of the bead but also along the side of the bead.

The above and other objects will appear more clearly from the following detailed description when taken in connection with the accompanying drawings showing the preferred embodiments of the inventive idea.

Referring to the drawings:

Figure l is a side elevational view of one form of cap according to the present invention upon a substantially enlarged scale, as compared with the actual size of the cap in use.

Figure 2 is a transverse sectional view upon the line 2-2 of Figure 3.

Figure 3 is a bottom view of the cap upon the line 33 of Figure 1.

Figure 4 is a longitudinal sectional view of the a cap of Figure 1 on the top of a container and about to be pressed into sealing position by a suitable capping die.

Figure 5 is a side elevational view of the cap after attachment on the bottle upon a somewhat smaller scale as compared to Figures 1 to 3.

Figure 6 is a longitudinal cross sectional view of the cap of Figure 5 after application and upon the same scale as Figures 1 and 2. 5

, of Figure 8.

Flgure'lisasideviewpartlyin sectionofan alternative cap construction.

Figures 8 construction, Figure 8 being a side view and Figure 9 being a bottom view upon the line 6-9 Figure 10 is a side view of still another form of cap construction.

Referring to Figures 1 to 3, the cap has a base In, an upper skirt portion II and a lower skirt portion ii. The entire upper skirt portion Ii may be bulged or it may be provided with an intermediate bend, fold or bulge l2.

The upper skirt portion receives the thin flex ible paper, cloth or cork disk or insert D which disk or insert terminates substantially short of the bend I2.

The bulge of the skirt portion I I and the bulge or fold l2 provide extra metal to enable extension of the cap upon capping.

The lower skirt portion I2 is gathered or provided with a series of indentations or corrugations having outwardly extending rounded portions ll and indentations IS.

The cap may be made of steel or of alloys of iron, tin, brass. copper, aluminum and/or lead.

It will be noted by reference to Figure 3 that the inner portions I6 of the indentations to extend inside of the periphery I of the disk D and thus hold said. disk in a position that it cannot fall out. This construction eliminates the necessity of gluing or adhesively connecting the disk 7 .D to the base it of the cap and enables a simpler and better construction.

The disk may be composed of or faced with any suitably treated paper or foil material.

In applying the cap of Figures 1 to 3 to the top of the can B having the bead II, with a lower recess it, a cylindrical die I! with a bevelled lower edge 26 may be employed.

The die I! receives an actuating member 2i screwed at 22 into the threaded recess 23. The cylindrical member l9 also receives the coil spring 24 which presses down the flat die member 26. The flat member 26 has an upstanding nipple 26, which is tapped and receives the bolt 21 having the head 28. The bolt passes through an opening in the bottom of the cup 29 and may reciprocate in said cup 2! and also in the recess 3|! in the end of the rod 2|.

In operation, the capping die I! will come down and the inner edge a of the bevel 20 will strike the extended portion or bulge l2 at a point substantially below the base and inside of the maximum diameter of the said bulge.

Then, as the die I 9 continues its downward movement, it will collapse the bulge l2, inwardly and extend the metal of said skirt from the position as shown in Figures 1 to 4 to the position as shown in Figures 5 and 6.

At the same time, the metal of the base III and the cap will be drawn outwardly and downwardly over the bead I! with the result that in the final cap, after application, as shown in Figures 5 and 6, the metal of the base II will be under substantial tension and the expanded bulge l2 will press inwardly on the outside of the bead II.

While this drawing of the metal of the cap is taking place, the flexible sealing disk D is also being drawn outwardly with the result that it will be forced into the recess between the sides of the cap and the bead of the can thus the cork or flexible disk will not only seal the top 24 of the bead ll but will also seal the upper side of said bead as indicated at ll in Figure 6.

and 9 show another alternative cap Regardless of the depth of the bead l1, and the location of the recess II. the operation indicated inFigure4,withstraighteninsoutofthebulge II will cause the lower skirt It to collapse around the lower portion of the bead with the indentations and elevations ll, llbeing received in the recess 16. i

The attached cap, as shown in Figures 5 and 6. is devoid of sharp outstanding edges, has a relatively neat appearance and may be most readily applied by a capping die such as indicated in Figure 4, with rapidity and decreased breakage by automatic machinery.

The cap will uniformly support a much higher internal pressure than the usual "crown" type and a most satisfactory seal will be obtained even with pressures exceeding 100 pounds.

It will be noted that the outside of the cap, as shown in Figures 5 and 6, after attachment will be substantially cylindrical and a prying or hottle opening tool may be inserted therebelow to lift the cap from the top of the bottle.

The caps as formed in Figures 1 to 3 may ordinarily have a maximum external diameter of 1 inches, and a maximum depth before placement upon the bottle top of inch.

In Figure 'I the shape of the bulge l2 has been slightly varied to provide a concavity at M .as contrasted to the convexity at N in Figure 1,

similarly functioning parts being indicated by ,the same numerals provided with a superior 23' The manner of drawing'the ca'pdown over the bead is substantially the same in connection with the embodiment of Figure 7 as has already been described in connection with the embodiment of Figures 1 to 6.

when the capping head l9, as shown in Figure 4, descends over the cap, as shown in Figure 7, the edge 20a of the capping head, as shown in Figure 4, will catch the cap at about the point 45, and will draw the base of the cap 10 and the upper side of the cap il outwardly and downwardly over the bead II of a can or bottle, as the case may be. The lower portion of the skirt will be pressed downward and inwardly and the crimped or serrated portion II will be forced under the bead I'I into the recess I 6 in the manner indicated in Figure 6.

In Figures 8 and 9 is shown another altemative construction similar to Figures 1 to 3 in which correspondingly functioning parts are indicated by the same numerals provided with a superior 3.

In Figures 8 and 9, the crimped, indented or gathered structure I! at the bottom of the skirt I l is provided with a series of outwardly projecting rounded portions which replace the ordinary rounded portions ll, as shown in Figures 1 to 3.

These spaced extended rounded portions when collapsed inside of the recess below the bead will, in certain instances give better and stronger seals capable of withstanding higher pressure.

The bulge ll will contact with the edge 20a of the capping head at about the point 42 and the bulged portion l2 will be pressed downwardly and inwardly with the corrugated or serrated portion I5 being forced into the recess of the can II. In Figure 10, the bulge 46* is positioned at the upper part of the skirtportion other corresponding parts being indicated by the same numerals provided with a superior 4. The inner edge 20a of the capping head I! will strike the bulge which, in this embodiment. is at the inner portion of the skirt and in the area indicated by the numeral H at the point 45 and the peripheral portion of the base I0 and the sides of the skirt will be pressed downwardly and inwardly over the bead I1.

In all of the construction shown and described, the drawing downwardly and outwardly of the base ID will result in the edges 1 of the sealing disk D being pressed into the periphery or V- shaped space 35, as indicated in Figure 6, between the head I 1 and the skirt of the cap.

It is apparent that the specific illustrations shown above have been given by way of illustration and not by way of limitation and that the structures above described are subject to wide variation and modification without departing from the scope or intent of the invention, all of which variations and modifications are to be included within the scope of the present invention.

What is claimed ,is:

A cup shaped cap for application to bottles and cans provided with top beads and for application to similar containers, said cap having a circular base, a skirt depending downwardly circularly from the periphery of said base, a pliable sealing disk inset against said base inside of said skirt, said skirt having a corrugated edge portion of smaller average diameter than the upper portion of the skirt, but of larger average diameter than said beads, and an outwardly bulged portion providing extra metal above said corrugated edge, said bulged portion being adapted to be expanded longitudinally and contracted radially upon application of pressure in the direction of the axis of the cap to place the material of the cap under radial tension and grip the corrugated portion tightly below the beads whereby a tightly sealed contact with the top and side of said beads is maintained by radial tension in said cap.

HENRY SPENGLER.

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