US2273247A

US2273247A - Metal container and closure therefor

Info

Publication number: US2273247A
Application number: US255246A
Authority: US
Inventors: Herbert A Barnby; Samuel C Robison
Original assignee: Owens Illinois Glass Co
Current assignee: OI Glass Inc
Priority date: 1939-02-08
Filing date: 1939-02-08
Publication date: 1942-02-17
Anticipated expiration: 1959-02-17

Description

' Feb. 17, 1942. H. A. BARNBY ETAYL 2,273,247

METAL CONTAINER AND CLOSURE THEREFOR Filed Feb. 8, 1939 Hill: 017

III/I a 9 9, 12.14. arnb y 5 5 .6: 2,06}: am I INVEN TORS Patented Feb. 17, 1942 METAL CONTAINER AND CLOSURE THEREFOR Herbert A. Barnby and Samuel C. Boblson, I Toledo, Ohio, asslgnors to Owens-Illinois Glass Company, a corporation of Ohio Application February 8, 1939, Serial No. 255,246

3 Claims.

Our invention relates to improvements in metal containers and closures therefor and is particularly concerned with improving coffee containers and the like which are at least partially vacuumized just prior to the final sealin operation.

Among the important objects of our invention is the provision in a sheet metal container of an upper end wall construction which will greatly facilitate proper positioning of the closure thereupon and additionally facilitate removal of the closure by the consumer. To this end the wall is formed with an annular upstanding bead in proximity to the filling and discharge opening, such bead being so shaped that it will have a tendency to direct a closure coming in contact therewith, to a position directly over the filling opening. The head also provides a continuous fulcrum point for a prying implement which may the interior of the container upon initial breaking of the seal between the closure and container and contracting the skirt or flange about the wall of the filling opening to thereby securely attach the closure to the container.

Above all, it is an object of our invention to provide a novel and unusually eillcient metal container which may be vacuumized and will continue to be vacuumized over a considerable period of time, yet one which may be opened by the consumer with little difficulty and without any likelihood of there being such a vcomplete instantaneous breaking of the vacuum as will result in blowing out a considerable volume of the contents.

Another important feature of'our invention is the provision of a container and closure therefor which latter is unusually well adapted for use as a reseal. The exceptional adaptation of our closure to this use is due largely to the contractible skirt or flange which effectively grips the wall of the opening and secures the sealing ring in engagement with the sealing surface of said wall.

Other objects will be apparent hereinafter.

In the drawing: Fig. 1 is a fragmentary perspective view of the container and closure embodying our invention; Fig. 2 is a transverse sectional view showing 5 the container and closure structure and illustrating particularly the closure centering feature;

Fi 3 is a fragmentary sectional elevational view showing the manner in which the closure is removed fronrthe container;

Fig. 4 is a detail sectional view showing the closure in sealing position and a prying implement about to remove the closure;

Fig. '5 is a view similar to Fig. 4 showing the closure partially separated from the container; and

Fig. 6 is a sectional view taken substantially along the line 8-4 of Fig. 4.

Fig. 7 is a fragmentary sectional view of a modified form of closure attaching skirt.

Our improved container comprises a body ll of any preferred configuration having an upper end wall ll suitably connected thereto, as for example, by a double seam l2. This upper end wall or breast is provided with a central filling and discharging opening I! which is defined by an upstanding annular wall I, the upper margin II of which is inclined or tapered inwardly and upwardly and thence turned inwardly to form a top sealing surface and an internal stiffening bead I which lends rigidity to said wall. Spaced radially outward from the upstanding wall ll of said central opening is an external upwardly projecting rib ll which provides a continuous fulcrum point uniformly spaced from the 35 filling opening'and functions as a rest for a prying implement II, which as will be apparent, is

utilized in the removal of the closure C. This tral portion thereof is preiectly flat and the marginal area 22 is tapered outwardly and upwardly to a point at which it joins with the upper margin of the depending attaching skirt 2|. Within the closure at the juncture of the top portion 20 and skirt 2| and in a plane above the major central portion 2| of the top, a sealing ring 23 or gasket is secured to the metal. 55 gasket may be of any well known or preferred This form but preferably is of that type which is ordinarily flowed into the closure and vulcanized. As to this feature, however, it is understood that we are not restricted to any specific form of gasket.

Preferably the lower margin of the attaching skirt 2| is rolled to provide an external bead 24, thi bead being positioned externally in order that the skirt proper may snugly engage the wall H of the opening and additionally provide in etfeet a ledge or projection designed to be engaged by the prying implement l8. For the two-fold purpose of rendering the attaching skirt 2| expansible and providing vents through which air may rather quickly enter the container upon initial separation of the closure from the container, the skirt is provided with an annular series of external hollow ribs which extend from a point substantially in line with the lower edge of the sealing gasket downwardly through the beaded lower margin of the skirt. These beads 25 allow for expansion of the skirt during application of the closure to the container, the wall I of which is of slightly greater external diameter than the normal internal diameter of said skirt. Thus an extremely firm engagement between the closure and container is obtained with the result that anticipated abnormal in? ternal pressures will not accidentally displace the closure.

These ribs, owing to the fact that they are hollow and formed exteriorly of the skirt, provide internal channels or vents which operate immediately upon initial separation of the sealing gasket 23 from the upper end of the bead IE, to permit small volumes of air (the total being considerable) to enter the container and quickly reduce the vacuum. Thus, as has been pointed out heretofore, there is no sudden inrush of a great volume of air which actually would blow the closure oil of the container and blow out a considerable volume of the contents, particularly if the latter happened to be coffee or some similar granular material. As a result of the entry of air through the vents, the pressure on opposite faces of the closure is equalized. Removal of the closure is thereby materially facilitated. These vents also prevent premature complete displacement of the closure due to internal pressure created by the evolution of gas in the packed merchandise, coifee, for example.

As has been pointed out rather briefiy heretofore and is clearly illustrated in Fig. 2 of the drawing, the closure is more or less self-centering in that it is only necessary to place it upon the upper end of the container more or less in the general vicinity of the filling and discharging opening. This very obviously is due to the relative diametrical dimensions of the skirt of the closure and upstanding wall defining the filling opening, together with the inwardly declined guiding surface 26 which is formed between said wall and the upstanding rib ll. It is readily apparent that the tapered or inclined surface 26 will direct the closure into proper alignment with the filling opening immediately upon the application of sufilcient top pressure to the closure, even though the latter is positioned off center to the extent shown in Fig. 2 of the drawing. This feature is of considerable importance in that it avoids the necessity for extremely accurate initial positioning of the closures, such positioning being effected automatically or manually as circumstances may demand.

In Fig. 7 we have shown a modified form of attaching skirt 2| wherein the lower margin 2| is flared outwardly and then rolled outwardly, upwardly and thence inwardly to produce an external bead 2|, the diameter of which is equal to the diameter of an imaginary circle which touches the exterior of the several beads 25. The skirt is connected to the top portion of the closure by an annular channel-like portion 30 which is substantially inverted U-shaped in cross section.

Modifications may be resorted to within the spirit and scope of the appended claims.

We claim:

1. In combination, a container including a cylindrical body, a bottom therefor, a top having an upstanding annular wall defining a central filling and discharging opening of considerably less diameter than said body, said wall having its upper margin inwardly and upwardly tapered to facilitate positioning of a skirted closure thereover, a continuous pry-off rib intermediate the body and said wall and merging into the lower end of the latter, a sheet metal closure including a circular top portion and a depending attaching skirt, the internal diameter of said skirt normally being somewhat less than the maximum external diameter of said wall, an external reinforcing head at the lower edge of said skirts, and an external hollow rib formed in and transverse to the length of the skirt whereby the latter is capable of expansion to the maximum external diameter of said wall when subjected to top pressure during application of the closure.

2. In combination, a sheet metal container ineluding a circular body, an end wall having a circular filling and discharging opening of less diameter than said body, an upstanding wall about and defining said opening, said wall having its exterior upper portion tapered inwardly and formed at its free edge with an internal bead, an upstanding rib between the body and opening concentric with the latter and providing a combined pry-off rib and closure guiding surface inclined inwardly toward and merging with the base of said wall, that portion of said inclined surface below substantially the medial point thereof being spaced from the diametrically opposite point of said wall a distance substantially equal to the external diameter of a closure for the container, and a closure including a circular top portion and a resilient expansible attaching skirt.

3. In combination, a sheet metal container including a circular body, an end wall having a circular filling and discharging opening'of less diameter than said body, an upstanding wall about and defining said opening, said wall having its exterior upper portion tapered inwardly, an upstanding rib between the body and opening concentric with the latter and providing a combined pry-off rib and closure guiding surface inclined inwardly toward and merging with the base of said wall, that portion of said inclined surface below substantially the medial point thereof being spaced from the diametrically opposite point of said wall a distance substantially equal to the external diameter of a closure for the container, and a closure including a circular top portion and a resilient expansible attaching skirt.

HERBERT A. BARNBY. SAMUEL C. ROBISON.