US2271161A - Art of packaging - Google Patents

Description

Jan. 27, 1942. R. G. PECK, JR

ART OF PACKAGING Filed Aug. 19, 1959 Patented Jan. 27, 1942 ART OF PACKAGING Robert G. Peck, In, Chicago, 111., assignor to The Aridor Company, Chicago, 111., a corporation of Illinois Application August 19, 1939, Serial No. 290,946

1 Claim.

This invention relates to the art of packaging more particularly with vacuum type containers.

Among other objects, the invention aims to provide an improved package of this class having a more perfect seal between the closure and the container. The invention embraces both means and method for accomplishing this improved result with simplicity, economy and enhanced'emciency of application and operation.

The invention will be understood by reference I to the accompanying drawing forming a part .of

this specification and in which- Figure 1 is an elevational view of a package embodying the present invention and which may be of full size;

Figure 2 is a bottom plan view of the improved closure shown in Fig. 1;"

Figure 3 is a fragmentary cross-sectional view on an enlarged scale of the parts of Figs. 1 and 2 before assembly; and

Figure 4 is a view similar to Fig. 3 but after assembly.

' Referring in detail to the drawing the container Ill may be of the usual glass form adapted to carry for merchandising food stuffs which it is desirable to keep out of contact with the air until just before using, at which time the closure or cap II is removed.

In practice the food contents are placed,in the container l0 and the closure ll having the gasket 12 is pressed thereon under vacuum, that is, by a pressure applying mechanism which operates while it and the container and closure are all within a hood or bell from which the air has been temporarily exhausted, as is'well known in the art and need not be here specifically described.

In accordance with the present invention, the brim l3 of the container. I 0 is desirably of bulbous bead-like formation and the closure .1 I has a rim ll of U-shape cross-section. As here shown, the closure is of metal and has a disk-like center or cracking. As is well known in the art, it may be composed of flowed-in latex composition or the like.

When, now, the closure with its gasket is pressed upon the container, as described, and as shown-in Fig. 4, the material of the. gasket I2.

is displaced to. make room for the container brim and the gasket material isforced about the brim,

directed by the substantially rigid walls of the closure rim, to an extent suiiicientto cause the gasket material to contact the opposite sides of the container edge I! and I8 adjacent or where they join the containerbrim 43. Thus the gasket is compelled to assume itself a cross-section in the form of a horseshoe arch, forms a somewhat bayonet joint interlock'with the brim and provides a continuous film-like sealing medium about. the entire contour of the container brim and between the latter and the inner wall of the closure rim closely adjacent to and following said contour.

As will be readily understood, the atmospheric k pressure on the exterior of the package, which,-

. due to the vacuum within thepackage, is not balanced therewithin,' maintains the parts in the relationship effected as described and, in addition, the novel interlock described contributes materially. to this result in an improved manner.

At the same time, when the container is desired to be opened, excessive force is not required to remove the closure from the container, but merely suflicient force to overcome the atmospheric pressure on .theexterior of the container plus the resistance to flow of the gasket material, the metal rim of the closure not being in direct contact with thecontainer but serv-.

ing largely as described to direct the flow of the gasket and to serve as a mold"there'for,-inadditionto its other closure functions.

portion I5 from around which the rim I4 is in- Before the closure is pressed onto the containeras described, the gasket I2 is inserted intothe rim I4 of the closureto fill'the trough of the U somewhat as shown in Figs. 2 and 3. This gasket I2 is desirably at least semi-plastic and may be of rubber-like material having the capacity not only of stretchingbut of being permanently deformed under pressure without breaking Having described my invention, I claim- In a container package, the container having a brim of bulboiis bead-like cross-section, the

combination therewith of a closure having a continuou's rim of relatively deep inverted horseshoe-arch cross-section facing downwardly and adapted to receive the brim of the ontainer, the free edge of said rim being turne inwardly in a direction to form the horseshoe-arch cross-- section, the said free edge being continuously unbroken adjacent the bead-like brim and following the contour thereof, and a gasket in said rim of at least semi-plastic rubber-like .material also of horseshoe-arch cross-section and having an interlock with said brim, said gasket having initially substantially filled said rim and having flowed under pressure about said bead-like brim whereby to acquire said cross-section and provide said interlock in cooperation withvsaid brim and rim; ROBERT G. PECK, Ja.

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