Collapsible container

Abstract

A collapsible container with angularly related multiple folding sections, each section extending at an angle to the vertical, and flexure zones between adjacent sections for flexibly moving the sections between a first open position in the expanded container and a second position folded upon itself in the collapsed container, the flexure zones resisting movement of the sections in both the fully expanded container and the collapsed container, as well as any intermediate position wherein only selected flexure zones are in an open position.

Description

[0001] This is a continuation-in-part of application Ser. No. 10 / 735,724, David Kusuma, filed Dec. 16, 2003.BACKGROUND OF THE INVENTION [0002] The present invention generally relates to molded plastic containers of the type commonly used for a variety of purposes including storage of both food items and non-food items, such containers preferably being adapted to receive an appropriate seal or lid. More specifically, the invention is concerned with containers of this type which, rather than being of a rigid construction as with a conventional bowl, are collapsible or foldable to a compact position when empty to facilitate convenient storage. [0003] Such containers, in the form of cups, bowls, and the like, are generally known in the art and take many forms. These include collapsible cups or glasses wherein the glass is formed of telescopically stacked annular wall elements which slide relative to each other between a fully extended position and a collapsed position. As the wall eleme...

AI Technical Summary

Benefits of technology

[0004] A principal object of the present invention is to provide a collapsible container which presents or forms a substantially rigid receptacle in its open or expanded position and which, with an appropriate lid or seal snap-fit thereto, provides a practical watertight storage container for, as an example, an appropriate foodstuff or the like. The container is very convenient and provides a particularly desirable portable solution for food “on-the-go”, such as at picnics, lunches for those who take their own lunch to work, and other instances wherein temporary storage is desired. The collapsible nature of the container, collapsing to a substantially completely compacted configuration of minimal height, particularly with a seal mounted thereon to confine any residue in the now empty container, allows the used container to be conveniently stored or packed away in a “brown bag”, knapsack, picnic hamper, or the like, for subsequent cleaning and reuse.

[0005] In furtherance of the principal object of the invention, it is also an object of the invention to provide a method of molding the container in its collapsed position as a means of achieving maximum economies in mold apparatus and procedures, and in providing a molded product which is compact yet fully expandable to a relatively rigid self-sustaining position.

[0007] Other desired features of the invention include providing a container which can be washed in a dishwasher in its folded position and stacked therein in the same manner as conventional dishes, a container which stays open when in use and stays closed in storage, and a container which maximizes usable space for packing in a shipping carton as well as storage in the home.

[0008] In order to achieve the improved and highly practical container of the invention, the peripheral wall of the container, extending between a substantially rigid base and a substantially rigid top ring adapted to receive a snap-fit seal, includes a series of generally rigid annular or peripherally continuous wall sections joined to adjacent sections at fixed annular apex forming joints which are alternately inwardly and outwardly directed relative to the interior of the container. These sections have annular portions therebetween that are relatively flexible. The wall sections, in the expanded or open position of the container, are themselves alternatively angled inward and outward relative to the interior of the container and relative to the vertical, with the wall sections, sequentially upward from the base to the top ring, each being generally diametrically or peripherally progressively greater than the base. The configuration thus formed for the expanded container will be that of an inverted truncated cone with the wall sections basically outwardly stepped upward-from the base. This in turn allows for a direct downward collapsing of the wall sections into concentric surrounding relation to the base with the top ring surrounding the collapsed folded wall sections.

Problems solved by technology

As the wall elements are not integrally formed and slide freely relative to each other, there is a substantial possibility of leakage, and use other than as a temporary drinking vessel is not practical.

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