US 2688995 A
Description (OCR text may contain errors)
Sept. 14, 1954 E. L. WAGONER 2,688,995
LIQUID CONTAINER FOR BEER OR THE LIKE Filed Dec. 21, 1951 VENTOR EDM D L.WAGONER ATTORNEYS Patented Sept. 14, 1954 UNITED STATES PATENT OFFICE LIQUID CONTAINER FOR BEER OR THE LIKE Edmund L. Wagoner, Milwaukee, Wis.
Application December 21, 1951, Serial No. 262,740
This invention appertains to liquid containers and more particularly to containers of the beer can type.
While placing beer and other liquids in cans is desirable in that they require less space than bottles and are not likely to rupture or break during shipping, etc, there has always been a problem particularly in putting beer in cans due to the fact that a considerable internal pressure is built up in the can, and therefore much time and effort must be given to sealing the top and bottom thereof. In addition to using much needed metal, the interior of the cans must be coated to prevent the liquid from absorbing the so-called tin taste.
There has long been a need for an unbreakable container similar to the tin can, but made of a simpler and cheaper material which nevertheless will maintain the desired pressure seal, and in which the manufacturing problem is practically negligible. In an effort to overcome the above difliculty, various types of plastic containers have been developed, but heretofore this type of container has had the disadvantage of not being able to maintain or withstand the internal pressure. Heat sealing, etc. has not solved this problem in that the methods used are too involved, often expensive and unsatisfactory.
Therefore, a primary object of my invention is to provide a container for beer and other liquids which includes a one-piece molded plastic body and a cancavo-convex cover which, when applied to the container body, will effectively seal and prevent the internal gases from escaping.
Another object of my invention is to provide the upper periphery of the container body with an annular sealing groove into which is fitted a concave-convex cover, whereby internal pressures will force the cover into more intimate contact with the walls of the groove.
A more specific object of my invention is to make the cover of a slightly greater diameter than the interior diameter of the container, so that the cover will snap into the groove.
With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawing, in which drawing:
Figure 1 is a side elevational View in section of the container and its associated cover;
Figure 2 is a top plan view of the container and cover, certain parts being shown in section, to illustrate further the details of construction; and
Figure 3 is an enlarged fragmentary vertical section through the top portion of the container and cover and showing in particular the direction of forces resulting from internal pressures.
Referring to the drawings in detail wherein similar reference characters designate corresponding parts throughout the several views, the letter C generally indicates a container adapted to hold beer B or the like liquid. The container C includes a one-piece molded body I0 which is formed from a special plastic, namely polystyrene, which is noted for its characteristics of strength and non-corrosive qualities. The upper end II of the container It is provided with a tapered throat W 12, and directly below the throat I2 is an annular sealing groove [3.
The container is sealed by utilizing a concaveconvex cover M which is of a slightly greater diameter than the interior of the container and may even be slightly greater than the interior of the annular sealing groove l3. The outer periphery of the cover 14 terminates in a V-shaped leading biting edge l5, and when the cover I4 is snapped into the groove l3, the point IE will bite into the wall of the groove and form a sealing contact therewith. The cover 14 is also molded from the plastic polystyrene, but in this instance it is combined with polyethylene to impart to the cover a certain amount of desired flexibility.
After the container has been filled with the beer B and the cover snapped in place, an internal pressure will build up within the container,
and a vertical force will be exerted on the concave surface It of the cover [4 in the direction of the arrows in Figures 1 and 3 of the drawing. This pressure will tend to straighten or flatten the curved cover, and a resultant horizontal force will be transmitted to the outer periphery of the cover 54 in the direction of the arrow, Figure 3 of the drawing, causing the point Hi to bite further into the walls of the groove I3.
It should also be noted that the top H of the container I8 is formed with the usual annular bead ll so that conventional type beer openers may be hooked under the bead I1 and the top l4 punctured in the usual manner.
Changes in detail may be made Without departing from the spirit or the scope of my invention, but what I claim as new is:
A liquid container for beer and the like including a molded plastic one-piece body having an open top and having its upper periphery formed with a tapered throat entrance, an interits convex surface facing the interior of the con- 5 tainer and having its outer circumference slightly larger than the inner circumference of the container, saidannular groove having its inner circumferencei of; approximately theisame sizes-as the outer"circumfefence"of saidcover, whereby,
the cover may be snapped into position and pressure exerted on the interior of the cover will serve-- to further tighten it in the groove.-
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Perkins Dec. 28, 1886 Harvey Dec. 8, 1903 Ruchti Dec. 22, 1908 Jacoby Apr. 14, 1931 I Ferngren Nov. 16, 1937 'Tupper -1 Nov. 8, 1949 Webber Nov. 14, 1950 Barton Jan. 27, 1953