Closure for a shipping container - Patent Review 5052578

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BACKGROUND OF THE INVENTION

The present invention pertains generally to closures for containers in which articles are shipped and, in some instances, stored.

In the art are various types of closures for spiral-wound or molded tubular shipping containers. Drawbacks to known closures include high cost of manufacture, disposal costs and only one time use. A need exists for a secure closure for containers of various sizes subject to severe use as encountered in commercial or industrial areas.

SUMMARY OF THE PRESENT INVENTION

The present invention is embodied within a closure for convenient, secure installation in the open end of an elongate container typically constructed from a synthetic or natural material.

The present closure includes a disc having projections or tabs which, during closure installation, are displaced into engagement with the outer wall of the container end whereat the same may be secured in place by various means, as for example, stapling. The disc end abuts the container while an insert of the closure sets in a snug manner within an end segment of the container. Construction of the insert from yieldable material provides a cushion for the contained article in case of forceful contact with the closure. Further, the insert provides against entry of foreign matter into the container. The closure is reusable to permit use of the tubular container as a clean storage container.

Important objectives include the provision of a closure of low cost manufacture effecting secure closure of a shipping container in a reusable manner; the provision of a closure which lends itself to low cost production and disposal; the provision of a closure that permits a snug fit with the container end with a finger grip opening, normally closed by a door, permitting forceful manual installation and closure removal.

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings:

FIG. 1 is an elevational view of the internal or insert end of the present closure;

FIG. 2 is an upright sectional view of the closure taken along line 2--2 of FIG. 1;

FIG. 3 is an elevational view of the external or disc end of the closure;

FIG. 4 is an enlarged fragmentary view taken downwardly along line 4--4 of FIG. 2 with a fragment of a container wall show in solid lines;

FIG. 5 is a sectional view of a modified closure; and

FIG. 6 is an enlarged view of that structure encircled at 6 in FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With continuing attention to the drawings wherein applied reference numerals indicate parts similarly hereinafter identified, the reference numeral 1 indicates the disc of the present closure having a peripheral edge 1A and an outer face 1B.

The disc is of a size to have a peripheral margin 2 which overlies the outer end of a tubular container at 3 with the peripheral edge 1A substantially concentric with the outer wall of the container. The disc is provided with tabs 4 extending outwardly from disc edge 1A. The tabs are adapted for manual displacement toward the outer surface of the container and toward this end an indentation at 5 (FIG. 6) may be provided along the base of each tab. As shown in FIG. 2 in broken lines, each tab is bendable into contact with the container outer wall whereat tab securement may be completed as by stapling or an adhesive. In some instances the tabs may be taped to the container. A staple is indicated at S.

An insert at 6 is secured in place on the inner side or face 1C of the disc and has a circumferential wall which corresponds to the interior wall surface of the container to enable frictional engagement between insert and container. When so sized, the insert constitutes a virtually airtight closure for the container to prevent the entry of foreign matter during shipping or storage use of same.

A finger pull opening 10 is provided in the insert which is accessible via a die cut door 8 in the disc. The door is normally closed with an uncut area of the disc constituting a hinge 9 enabling finger access permitting the application of or a removal or outward force on the closure. Door 8 is closed prior to reinstallation of the closure.

A desirable feature of the present closure results from the formation of the insert from impact absorbing material, as for example, fibrous material such corrugated paper board which may be of any desired thickness achieved as by laminating sheets of corrugated material. In FIG. 5 a fragment is shown of a closure having an insert 6' of a synthetic, expanded foam material which can yield to impact forces yet effect desired frictional engagement with an internal wall segment of a tubular container. The insert 6 may be adhesively secured to the inner face 1C of disc 1.

In using the closure, it may be desirable to permit one of said tabs to remain attached to container 3 to permit the closure to swing about a flex line at 12 to provide an effective closure for a container used for storage purposes.

A suitable material for disc 1 is paper chipboard for low cost as well as convenient disposal particularly when combined with an insert of biodegradable material.

The peripheral margin 2 of the present closure will have a width approximating the wall thickness of the container as best shown in FIG. 6.

While I have shown but a few embodiments of the invention, it will be apparent to those skilled in the art that the invention may be embodied still otherwise without departing from the spirit and scope of the invention.

Having thus described the invention, what is desired to be secured by a Letters Patent is:

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