US2686606A - Closure packing for caps - Google Patents

Description

' 1954 E. o. FROITZHEIM CLOSURE PACKING FOR CAPS Filed April 15, 1951 Patented Aug. 17, 195 4 UNITED STATES PATENT OFFICE CLOSURE PACKING. FOE CAPS Ernst Otto Froitzheim, Koln-Ehrenfeld, Germany Application April 13, 1951-, Serial No. 220,752

Claims priority, application Germany May 24, 1950 2 Claims. I

This invention has reference generally to improvements in receptacle closures and, more particularly, relates to a closure packing for caps, covers, or the like, of bottles, hollow glasses, cans, and other receptacles.

It is one of the objects of the invention to provide a device of the above character in which a packing disc is permanently secured in the cover for a bottle, can, or other receptacle, and at the same time to construct the mouth of the receptacle so that it will coact with the packing and seal the contents of the bottle without contacting the part which acts to permanently fix the packing disc in position.

It is known to place in bottle covers made of metal, artiflical metal, or the like, packing discs for complete separation between the bottle neck and cover. These packing discs may be made of cork, cardboard, rubber, or like material.

It is also known to either force these packing discs very tightly into the covers or to secure them in the cover by an adhesive or to perform both actions simultaneously but the packing discs usually become loose due to continuous engagement with the mouth of the bottle when the flanged cover is being screwed into position on the bottle neck or removed therefrom. In other words, during repeated opening and closing of the cover the packing discs are always subjected to pressure and turning motion and become deformed.

This deformation results in loosening of the packing disc from the cover in spite of the adhesive securing the disc.

The present invention has for one of its objects to remove these technical disadvantages by employment of a special holding ring. The securing of the packing disc in the cover by an adhesive may be dispensed with. Moreover, the packing disc may now have a smaller diameter than the inner diameter of the flanged cover and thereby enabling the expanding under the pressure of the bottle neck without undesired deformation.

This holding ring is so arranged that it is not contacted by the bottle neck and not subject to any pressure.

The holding ring is tightly pressed with a tight fit into the cover after previous introduction of the packing disc with or without a covering sheet. The holding ring may also be provided at the outer margin with projections assuring of an especially firm mounting.

It is an additional and equally important object of the invention to construct the bottle neck so that it will not under any circumstance contact the holding ring but on the contrary seal against the inner central portion of the packing disc.

Other objects, as well as the nature, characteristic features, and scope of the invention will be more readily apparent from the following description taken in connection with the accompanying drawings and pointed out in the claims forming a part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view of one form of the invention as applied to a perfume bottle, and

Figure 2 is a plan view of the holding ring per se.

Referring now more particularly to the accompanying drawings, there is provided a bottle 5 the outer end of which is formed with a neck 6 which is provided with external threads I. The neck terminates at its outer end in a dome-like portion 8, the outer surface of which is tapered and defines a frustrum of a cone. At the outer end of the cone and on the outer surface two concentrically arranged, annular and spaced ribs 9 are provided which when the flanged cover In with the packing disc ll provided therein are crewed on to the neck penetrate with increased pressure the adjacent surface of the packing disc, thereby providing an effective sealing of the contents. Concentrically and within the innermost ring the bottle is provided with a mouth or opening I2 through which the contents can be dispensed after the cover has been removed.

The holding ring I3, characteristic of the invention and also shown in detail in Figure 2, has an internal diameter indicated by the arrows and the numeral Ill of a size preventing any contact between the holding ring and the bottle eck. At the outer periphery it is provided with a series of projections I5 which under light but reliable pressure abut the inner surface of the flange of the cover so that the holding ring even after long use lasts in a reliable manner and cannot become axially displaced in the cover or loosen itself therefrom.

It is believed in view of the foregoing that a further detailed description of the operation of the invention is entirely unnecessary. Likewise it is believed that the advantages of the invention will be readily apparent.

Having thus fully described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. A screw threaded closure for containers comprising a plane top, an integral downwardly depending generally cylindrical skirt having suitable screw threads therein, a packing disc of soft resilient material on the under face of said top and fully covering same, and a flat retaining ring positioned on the exposed face of said packing disc and having a series of radially extending projections thereon forming a continuous outer sinusoidal circumference of the ring with said projections resiliently engaging the inner wall of the skirt of said cap for holding the packing disc in place.

2. A bottle and closure therefor, said bottle having a neck comprised by a cylindrical section having suitable screw threads on the outer periphery, said neck terminating at its top in a frusto-conical section having a plane lower base merging into an inwardly and upwardly inclined side wall, an upper base having a central 20 hole therethrough, and a circular groove V- shaped in cross-section in said upper base having one side at the top of the inwardly and upwardly inclined side wall and the other side adjacent said central hole, and said closure comprising a 2,

plane top, an integral downwardly depending generally cylindrical skirt having screw threads therein complementary to the screw threads on the cylindrical section of the bottle neck, a packing disc of soft resilient material on the under face of said top and fully covering same, and a fiat retaining ring having an internal diameter greater than that of the V-shaped groove in the top positioned on the exposed face of the packing disc and having a series of radially extending projections thereon forming a continuous outer sinusoidal circumference of the ring with said projections resiliently engaging the inner wall of the skirt of said cap for holding the packing disc in place.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 979,183 Mackin Dec. 20, 1910 1,137,725 Carvalho Apr. 27, 1915 1,788,129 Stephenson Jan. 6, 1931 2,039,757 Von Till May 5, 1936 2,058,214 Cohn Oct. 20, 1936 2,080,144 Lufkin May 11, 1937 2,142,380 Sharp Jan. 3, 1939 FOREIGN PATENTS Number Country Date 651,875 France Oct. 15, 1928 513,830 Great Britain Jan. 11, 1938 355,832 Italy Jan. 18, 1939

Images