DUAL FUNCTION OVERCAP FOR A CONTAINER WITH A REMOVABLE MEMBRANE
There is provided an interference-fit overcap for a container with a removable membrane. The overcap includes a skirt that provides an interference-fit with the rim of the container surrounding an opening in the container when the membrane is attached to the container. The overcap also includes a circumferential ring extending from the overcap in a direction opposite the skirt. The circumferential ring has an outside surface that is dimensioned to produce an interference fit with an inner wall of the container after the membrane has been removed. Thus the overcap may be securely attached to the container both before the membrane is removed and after the membrane is removed, such that the contents of the container may be sealed by the overcap after the membrane is removed.
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The present invention relates generally to containers with overcaps. More particularly the invention relates to overcaps for containers with a removable membrane.
BACKGROUND OF THE INVENTIONContainers that store perishable goods, such as food products, often include a sealed membrane to minimize the transfer of oxygen, moisture, or contaminants into the container. The membrane is removed by the customer when the container is first opened, and the membrane is discarded. An overcap is provided for re-closing the container after the initial opening. The overcap engages a rim (e.g., a rolled bead or a flange) on the top of the container in such a way that a snap-fit or interference-fit connection exists to retain the overcap in place on the container.
When the membrane is located directly below the overcap, both overcap and membrane provide a sealing barrier over the opening prior to the first opening of the container. Once the membrane has been removed, the overcap provides the only barrier for the remaining product during subsequent storage. Therefore, the overcap should securely connect to the container to reseal the stored product.
While a membrane is attached to a container, it often extends outwardly to the surface of the container to which the overcap attaches. In such a situation, the overcap is dimensioned to create a tight fit with the container surface and the membrane. However, once the membrane has been removed and the overcap replaced, the overcap may not create a tight fit with only the container surface because of the missing membrane. A loose fit may allow oxygen, moisture, or contaminants to enter the container or may cause the overcap to come off unintentionally.
Therefore, a need exists for an overcap for containers with membranes that provides an interference-fit when the membrane is attached and when the membrane is removed.
BRIEF SUMMARY OF THE INVENTIONThe invention addresses the above needs and achieves other advantages by providing an interference-fit or snap-fit overcap for engaging a radially outwardly protruding rim of a container that includes a removably attached membrane. The overcap includes a top panel with a periphery and a skirt that extends from the periphery of the top panel. The skirt provides an interference-fit with the rim when the membrane is removably attached to the container. The overcap also includes a circumferential ring that extends in a direction opposite the skirt, and the circumferential ring defines an outside surface that is diametrically dimensioned to produce an interference-fit with an inner wall of the container after the membrane has been removed from the container. Thus, the present invention provides an overcap that in one orientation can be secured to the container when the membrane is attached, and that in an opposite orientation can seal the container closed after the membrane has been removed.
The circumferential ring of the overcap of some embodiments of the present invention defines an outside surface that is generally angled relative to the axis of the opening of the container to thereby provide an interference-fit with the inner wall of the container. Furthermore, the circumferential ring of additional embodiments defines an innermost portion that is diametrically dimensioned to receive a bottom portion of a second container to thereby allow stacking of containers prior to removal of the membrane.
The present invention also provides a container with a membrane and an overcap. The container includes a container body formed by a wall, where the wall defines an opening encircled by a radially outwardly protruding rim. The membrane is removably attached to the container to substantially cover the opening while the membrane is attached. The overcap includes a skirt and an opposed circumferential ring, as described above. Thus containers of the present invention may be sealed by interference-fits with the overcap when the membrane is attached and when the membrane is removed.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGSHaving thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
The present invention now will be described more fully hereinafter with reference to the accompanying drawings in which some but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
With reference to
Referring now to
The container 14 as illustrated in
The membrane 16 of
The overcap 12 of
The skirt 32 of
Referring again to
The outside surface 50 of the circumferential ring 36 of the illustrated embodiments of the present invention defines a surface that is generally angled relative to the axis (or axial direction) of the container 14. The angled outside surface 50 is structured to generally coincide with the angle of an inner wall 52 of the container 14 such that when the overcap is inverted, as illustrated in
The overcap 12 of
Many modifications and other embodiments of the invention set forth herein will come to mind to one skilled in the art to which the invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the invention is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims
1. An interference-fit overcap for engaging a radially outwardly protruding rim encircling a container opening having a removably attached membrane, wherein the container defines an opening encircled by an inner wall of the container, the overcap comprising:
- a top panel having a periphery;
- a skirt extending in a first direction from the periphery of the top panel to a distal end, wherein the skirt provides an interference-fit with the rim when the membrane is removably attached to the container; and
- a circumferential ring extending in a second direction, which is generally opposite the first direction, from the top panel and defining an outside surface on a radially outermost portion of the circumferential ring, wherein the outside surface is diametrically dimensioned to produce an interference-fit with the inner wall of the container after the membrane has been removed from the container.
2. An interference-fit overcap according to claim 1, wherein the container defines an axial direction and the outside surface of the circumferential ring defines a generally angled surface relative to the axial direction.
3. An interference-fit overcap according to claim 1, wherein the skirt defines a radially-inwardly extending bead at the distal end of the skirt.
4. An interference-fit overcap according to claim 1, wherein the circumferential ring defines an innermost portion that is diametrically dimensioned to receive a bottom portion of a second container.
5. A container, comprising:
- a container body formed by a wall, wherein an inner wall defines an opening encircled by a radially outwardly protruding rim;
- a removably attached membrane substantially covering the opening while the membrane is attached; and
- an interference-fit overcap, comprising: a top panel having a periphery; a skirt extending in a first direction from the periphery of the top panel to a distal end, wherein the skirt provides an interference-fit with the rim when the membrane is removably attached to the container; and a circumferential ring extending in a second direction, which is generally opposite the first direction, from the top panel and defining an outside surface on a radially outermost portion of the circumferential ring, wherein the outside surface is diametrically dimensioned to produce an interference-fit with the inner wall of the container after the membrane has been removed from the container.
6. A container according to claim 5, wherein the outwardly protruding rim is an outwardly rolled bead.
7. A container according to claim 5, wherein the container defines an axial direction and the outside surface of the circumferential ring defines a generally angled surface relative to the axial direction.
8. A container according to claim 5, wherein the skirt defines a radially-inwardly extending bead at the distal end of the skirt.
9. A container according to claim 10, wherein the circumferential ring defines an innermost portion that is diametrically dimensioned to receive a bottom portion of a second container.
10. A container according to claim 10, wherein the membrane is a metal foil.
11. A container according to claim 10, wherein the overcap is a thermoplastic material.
12. A sealable storage device, comprising:
- a container, comprising: a body formed by a wall, an opening defined by an inner wall of the container, and an outwardly rolled bead encircling the opening of the container, wherein the bead protrudes generally outward from the wall;
- a removably attached membrane substantially covering the opening while the membrane is attached; and
- an interference-fit overcap of thermoplastic material, comprising: a top panel having a periphery; a skirt extending in a first direction from the periphery of the top panel to a distal end, wherein the skirt provides an interference-fit with the rim when the membrane is removably attached to the container; and a circumferential ring extending in a second direction, which is generally opposite the first direction, from the top panel and defining an outside surface on a radially outermost portion of the circumferential ring, wherein the outside surface is diametrically dimensioned to produce an interference-fit with the inner wall of the container after the membrane has been removed from the container.
Type: Application
Filed: May 11, 2006
Publication Date: Nov 15, 2007
Applicant:
Inventor: James Stevens (Florence, SC)
Application Number: 11/382,775
International Classification: B65D 51/00 (20060101);