Patent Application
20130270146
This disclosure relates to flexible walled, collapsible, article containers made of polymeric film and methods of use of such containers. More particularly, it relates flexible walled, collapsible, article containers made of polymeric film having multiple use capability.
Many forms of sealed article containers exist. One category, flexible walled collapsible article containers of polymeric film, plastic bags, represent a cost efficient packaging arrangement. Articles such as clothing are often packaged in sealed plastic bags for initial delivery to the consumer.
In some instances, the packages are filled with an article to be delivered, evacuated to minimize volume and sealed. Such an arrangement eliminates entrained air in the packaged article and minimizes the volume of the package. Such containers are used to transport garments or other articles in a waterproof and contaminant free environment. The usefulness of such containers is diminished on opening by the consumer and the container usually then discarded.
Also, plastic bag configurations are commercially available with a sealable entrance opening. Such bags include a releasable latching mechanism sometimes in the form of connectible channels that interengage to form a seal. Examples are found in U.S. Pat. Nos. 5,070,584, 5,664,299 and 5,647,100.
Evacuatable, flexible walled collapsible storage containers are also known. They are made from heavy duty plastic film and include a valve or port for connection to an evacuation device.
Such containers are arranged for reuse and include a closure mechanism to reestablish a sealed enclosure for contained articles. They are arranged for evacuation of entrained air from the defined chamber to minimize volume and maximize space utilization. “Space Bags” for example, available from ITW, San Diego, Calif., and are sold empty, in packages of multiple bags.
While these various configurations of flexible walled collapsible article containers are individually available, none are known to accomplish all of these desired functions.
The article container of this disclosure provides the desired capabilities of initial use as a sealed article container, and subsequent use as a reclosable, general purpose article container that possess the capability to provide space conservation through overall volume reduction after filling, all in a single container structure.
A film suitable for container 10 is low density polyethylene film, though other polymeric films could be used. In the illustrated form, the container is about fourteen inches (14″) wide. The film contemplated for this type of article container is from two (2) to ten (10) mils thick. It is illustrated as a pouch to contain, for example, a garment, miscellaneous toiletries or other articles.
The specific size of the container 10 and thickness of the film is illustrative only and may be varied as desired for specific applications. Since the collapsible article container may reside in any orientation, the terms top, bottom, side, upper, lower, etc., are used to describe the embodiment of the illustrations and are not intended to limit the scope of the disclosure. Similarly as used herein for purposes of understanding of the disclosure the term “inner” or “inward” as used herein means toward the interior of the pouch formed by the collapsible article container.
In the illustrated embodiments, container 10 is formed by a pair of polymeric side wall sheets 14 and 16 sealed together along side edges 18 and 20 by side seal strips 22 and 24. Side seal strips 22 and 24 illustrated are about one-quarter inch (¼″) wide and formed by heat sealing together the interior surfaces of sheets 14 and 16. Alternatively, the side walls 14 and 16 of container 10 could be formed, for example, from a single sheet, folded in half upon itself and sealed along one edge. In another form, side walls 14 and 16 could be formed by a continuous tubular sheet of film flattened upon itself to form side walls 14 and 16. The manner of forming the side walls or the number or width of the seal strips are not significant to the features of the disclosure.
Container or pouch 10 is sealed along transverse bottom edge 26 by a bottom transverse seal strip 28 which is formed similarly to side seal strips 22 and 24. A transverse top edge 30 defines an open mouth entrance opening 31 for filling. It is later closed by transverse top seal strip 32 during the process of filling as will be explained. The defined volume within the container or pouch 10 is thereby completely isolated from the surrounding atmosphere.
Transverse top seal strip 32 and transverse bottom seal strip 28 are formed by heat sealing and are also about one-quarter inch (¼″) in width though this dimension, like the others, is for illustration and is not limiting.
In the illustrated embodiment, spaced inwardly from transverse top edge 30, that is, toward transverse bottom edge 26, there is provided a closure mechanism 34. The longitudinal spacing between transverse top edge 30 and closure mechanism 34 provides a tubular portion 35 for connection to evacuation equipment for evacuation of the internal void area or container volume. After evacuation, the top edge 30 is closed with transverse top seal strip 32 to create an evacuated container 10 of minimum internal volume. Thereafter, access to the content of the package 10 is accomplished by rupture of the film sheets 14 or 16 in the tubular portion 35 for example by cutting along dotted line 37 which thereafter defines the top edge of container 10.
The closure mechanism 34 is illustrated is a dual channel, “press to close” arrangement in common use for reusable polymeric collapsible article containers. Examples can be found in U.S. Pat. Nos. 5,070,584 and 5,647,100 though numerous seals of this general type exist and would be suitable.
The illustrated closure mechanism 34 includes “U” shaped channel elements adhered to the interior surface of each sheet 14 and 16 with the legs of the “U” shape facing the legs of the “U” shape of the channel on the opposing interior sheet surface. The channels are aligned such that the legs of the channels can be pressed into releasable engagement to form a seal across the width of the container 10. Resealable closure mechanism 34 may be connected together to form a tight seal across the container 10 near its upper end.
The closure mechanism 34 is useful to close the container 10 after initial access to the contained article by the recipient through the rupture of the sealed container 10 at tubular portion 35. The container in this configuration serves as a resealable plastic bag for subsequent storage of the original contained article, or other sundries.
In accordance with the disclosure, spaced inwardly from transverse bottom seal strip 28, container 10 includes an air purge mechanism generally designated 39. As illustrated it includes a pair of spaced apart, truncated, transverse seal strips 40 and 42. These truncated transverse seal strips 40 and 42 are parallel to the bottom and top transverse seal strips 28 and 32 and extend respectively from one side seal strip 22 or 24 partially toward the other side seal strip.
As illustrated, truncated transverse seal strip 40 extends from side seal strip 22 at lateral edge 18 nearly the entire distance to side seal strip 24 at edge 20 to a terminus 46. It defines a passage 47 between its terminus 46 and side seal strip 24.
Similarly, truncated transverse seal strip 42 spaced inward from truncated transverse seal strip 40 extends from side seal strip 24 at edge 20 nearly the entire distance to side seal strip 22 at edge 18 to a terminus 48. It defines passage 49 between its terminus 48 and side seal strip 22. The space between truncated transverse seal strips 40 and 42 defines a restricted flow path 50.
The transverse bottom seal strip 28 and truncated seal strip 40 define a tubular area 52 denominated a volume reduction port in communication with the contained volume within pouch 10 through restricted flow path 50 and passages 47 and 49. As such, these areas are evacuated by the evacuation device connected at tubular portion 35. Its function as a volume reduction port is explained below.
While a particular air purge mechanism 39 is illustrated, it is contemplated that numerous alternative arrangements are suitable. For example, the air purge mechanism could comprise a small “one-way” plastic check valve secured in one of the side walls 14 or 16. Also, one or more additional layers of plastic film, optimized for air evacuation could be secured by adhesive or heat welding to one of the side walls 14 or 16.
It is contemplated that the pouch 10 may be made from aligned, continuous rolls or webs of film in a well-known process. They could be made by other processes. The webs are cut into individual pieces which comprise individual containers 10. Multiple containers 10 are packaged together for delivery to the initial commercial user.
The commercial user inserts an article 100, seen in
The available features of the flexible walled collapsible article container 10 of the present disclosure are utilized in the following exemplary sequence. As previously described, multiple units of container 10 are delivered to the initial commercial user. For example, a garment manufacturer inserts an article 100 into container 10 and evacuates the container volume. The container is sealed at seal strip 32 to complete the package. It is evacuated and thus represents a minimum volume. Container 100, and others like it are packed into shipping containers such as cardboard boxes, stored and shipped to distributors of the packaged articles. These represent a minimal space requirement and reduce the expense of these various handling functions.
On distribution of the articles to an ultimate user, the side wall sheets 14 and 16 of a container 10 are cut along line 37 to remove transverse top seal strip 32 above the closure mechanism 34. Manual separation of closure mechanism 34 provides access to interior volume for removal of article 100.
On removal of article 100 as described, the container 10 is usable as a flexible storage container. The closure mechanism 34 provides a means for resealing the otherwise open top end of container 10.
Should it be desirable to accomplish minimization of volume, as in the initial use by the packaging entity, it is only necessary to render the air purge mechanism 39 operational. This is accomplished by cutting the side wall sheets 12 and 14, within volume reduction port 52 for example, along dotted line 57 to provide communication to the atmosphere at passage 47 through restricted flow path 50 and passage 49. Cut line 57 thereafter defines the bottom edge of container 10.
To use the volume minimization function, an article 100 is placed in container 10 through the open mouth entrance opening 31 of the container 10. The “press to close” seal mechanism 34 is manually closed to form a seal above the article which is positioned between mechanism 34 and truncated transverse seal strip 42. The container 10, with contents 100, is then rolled from its top edge represented by cut line 37 toward its bottom edge represented by cut line 57 to reduce internal volume. Air within the container is forced out through air purge mechanism 39 along restricted flow path 50, which communicates with the atmosphere at volume reduction port 52. Though an opening remains at passage 47, it is only necessary to hold the container 10 in its compressed, minimum volume condition, until inserted into a confined position, such as in a packed suitcase. It will remain compressed and in its minimum volume condition until removed by the user to again retrieve the contents through the open mouth at cut line 37 by manually opening closure mechanism 34.
Variations and modifications of the foregoing are within the scope of the present invention. It is understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention. The claims are to be construed to include alternative embodiments to the extent permitted by the prior art.
This non-provisional application claims the benefit of, and priority from U.S. Provisional Application 61/426,607 filed Dec. 23, 2010, the contents of which is incorporated by reference herein in its entirety.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/US11/66929 | 12/22/2011 | WO | 00 | 6/21/2013 |
| Number | Date | Country | |
|---|---|---|---|
| 61426607 | Dec 2010 | US |
