Patent Grant
7950546
The present invention relates to a resealable container and cap assembly for storing and packaging moisture-sensitive items, including but not limited to edible breath-freshening strips, drug-delivery strips, diagnostic test strips, and effervescent tablets.
The present invention relates to a re-sealable container and cap assembly for storing and packaging moisture-sensitive items, including but not limited to edible breath-freshening strips, drug delivery strips, diagnostic test strips, and effervescent tablets.
The container substantially prohibits the ingress of moisture into the container through the lid when the container is sealed. In other words, it is substantially moisture-proof. In another aspect of the invention, the container assembly is provided with a desiccant or similar material, which reduces the moisture present within the container when it is sealed. That is, after the container has been sealed, the desiccant absorbs moisture present therein. Likewise, after the container has been opened and then resealed, the desiccant absorbs moisture that entered the cavity when the container was opened.
In one embodiment of the present invention, the assembly comprises a cap and container that may be attached by a hinge. The hinge has a recess. The recess forms two elements, the first element being attached to the cap portion and the second element being attached to the container portion. In still a further embodiment, the recess functions as a bending point during the opening and closing of the container assembly.
The container has a sidewall depending downwardly from a top container surface. A bottom container surface is joined to the sidewall. The top container surface is provided with an opening, permitting access to the interior of the container. The opening is bounded by a lip that depends upward from the top container surface. A rim is positioned on the outside of the upper end of the lip.
The cap portion of the assembly is attached to the container portion by a hinge. The cap portion has a base portion with an outer periphery that extends over the container portion. In one embodiment, a portion of the base portion serves as a tab for facilitating the opening and closing of the container assembly. In yet another embodiment, the base portion is provided with a skirt that depends downwardly from a central portion of the base portion. The skirt is positioned at a location on the base portion that allows the skirt to enter into a closing relationship with lip of the container portion, in which the skirt of the base portion fits over the periphery of the lip provided on the top container surface (or, as the case may be, the skirt fits within the periphery of the lip). The skirt of the base portion has an end distal to where the skirt joins the cap portion. At the distal end of the skirt, the skirt is provided with an inward extension, which extends around the interior periphery of the skirt. Similarly, the lip of the container portion is provided with an end distal to where the lip joins the container portion, and the distal end of the lip is provided with an outward facing extension, which extends around the periphery of the lip. In effect, the extension on the skirt and the extension on the lip face each other. In constructing this arrangement on the skirt and lip, the extensions will abut and interlock with each other when the cap is closed on the container portion. In this arrangement, the interlocking, abutting extensions will form at least a substantially moisture-tight sealing arrangement with each other.
In yet another embodiment, a lip seal member depends downwardly and extends around the cap portion. The lip seal member is positioned interior to the skirt, which also depends downwardly from the base portion. Further, the lip seal member is positioned to lie interior of the lip extending upward from the container portion. When the cap is in the closed position, the lip seal member abuts the interior side of the distal end of the lip. In this arrangement, the lip seal (1) provides a sealing position, in addition to the one between the skirt and the lip; and (2) applies pressure on the lip from the inside out, which in turn applies pressure on the skirt, thereby applying tightening the seal between the skirt and the lip.
In yet another embodiment, the cap and/or container contain a desiccant, in the shape of a disc (e.g. puck), sleeve, or other desired shapes.
In yet another embodiment, the assembly includes an elastomeric liner applied to selected regions of the assembly. For example, elastomeric liner may be positioned on the interior surface of the cap, between the skirt and where the lip seals are provided, it may line the lip seals as well.
In yet another embodiment, the skirt depending downward from the base portion has a distal end that is provided with an inward extension. The lip has an end distal to the location where the lip joins the container top surface, where the recess is positioned. The recess is adapted to receive the extension when the cap portion is closed upon the container portion.
In one embodiment, the containers of the present invention have a relatively small height dimension, making them well adapted to fit in a handbag, purse, or pocket. Despite this small height dimension, the container is well suited to storing items such as candies, edible breath-freshening strips, and diagnostic test strips, such as those employed in testing blood glucose levels.
In yet another embodiment, the opening of the container is irregular in its shape, not having a uniform radius. In other words, it is not circular.
In a further embodiment, the containers of the present invention has an upper and lower portions. The upper and lower portion are sealed to form a moisture tight seal. In one example, after the container is filled with the desired moisture-sensitive items, the lower portion is sealed with a barrier film. In another example, after the container is filled with the desired moisture-sensitive items, the lower portion is sealed to the upper portion by employing a snap-fit mechanism. In a further example, after the container is filled with the desired moisture-sensitive items, the lower portion is sealed to the upper portion by employing an elastomer and/or gasket arrangement. In yet a further example, after the container is filled with the desired moisture-sensitive items, the lower portion is sealed to the upper portion by ultrasonic welding.
The container and cap assembly for storing and packaging moisture-sensitive items, including but not limited to edible breath-freshening strips, drug-delivery strips, diagnostic test strips, and effervescent tablets, substantially prohibits the ingress of moisture into the container through the lid when the container and cap are sealed.
The assembly 10 is generally provided with a cap portion 12 and container portion 14 that are attached by a hinge 16. The hinge 16 has a recess 16′. The recess 16′ forms two elements, the first element being attached to the cap portion and the second element being attached to the container portion In still a further embodiment, the recess functions as a bending point during the opening and closing of the container assembly.
The container portion has a container base 13, and a sidewall 11 depending upwardly from the base 13. A top container surface 17 extends inward from the sidewalls, the top container surface 17 and sidewall 11 together defining an upper housing portion 19 of the container portion. The top container surface 17 is provided with an opening 20, permitting access to the interior of the container. The opening 20 is bounded by a lip 22 that extends upward from the top container surface 17. Lip 22 extends around the periphery of the opening 20. The lip 22 has an end 21 distal to the location where the lip joins the container top surface, where an extension 23 is positioned and faces outward, relative to the opening 20. The extension 23 extends around the periphery of the lip distal end 21.
The cap portion 12 has a base portion 24 with an outer periphery 25 that extends over at least a portion of the container portion. In one embodiment, a portion of the base portion 24 serves as a tab 15 for facilitating the opening and closing of the container assembly. The base portion 24 is provided with a skirt 26 that depends downwardly the base portion. The skirt 26 is positioned at a location on the base portion 24 that allows the skirt 26 to enter into a closing relationship with lip 22 of the container portion 14, in which the skirt 26 of the base portion 24 fits over the periphery of the lip 22 provided on the top container surface (or, as the case may be, the skirt fits within the periphery of the lip). The skirt 26 of the base portion 24 has an end 27 distal to the end at which the skirt joins the cap portion. At the distal end 27 of the skirt, the skirt is provided with an inward extension 28, which extends around the interior periphery of the skirt. At the distal end 27 of the skirt, the skirt is provided with an inward facing extension 28, which extends around the periphery of the skirt distal end 27. When the cap portion is closed on the container portion, the extension 28 on the skirt 26 and the extension 23 on the lip 22 face each other. Further, when the cap portion is closed on the container portion, the extensions will abut and interlock with each other. In this arrangement, the interlocking, abutting extensions will form a moisture-tight seal with each other.
In yet another embodiment, a lip seal member 30 depends downwardly and extends around the inside of the cap portion 12. The lip seal member 30 is positioned interior to the skirt 26 which also depending downwardly from the base portion 24. Further, the lip seal member 30 is positioned to lie interior of the lip 22 that extends upward from the container portion 14, and abut the interior side of the distal end of the lip 22, when the cap is in the closed position. In this arrangement, as shown in
In yet another embodiment, shown in
In yet another embodiment, the cap and/or container contain a desiccant, in the shape of a disc (e.g. puck), sleeve, or other shapes. In one embodiment, a desiccant entrained plastic is located in a desiccant liner that covers at least a portion of the cap and/or container, such as the desiccant-entrained plastic sleeve 34 positioned at the bottom of the container. See
The desiccant-entrained plastic contains a desiccant such as silica gel or molecular sieve as the desiccant. Depending on the application, such as the application intended by the end user, molecular sieve or silica gel desiccant can be provided in the sleeve. For example, molecular sieve can be used for applications that require a low RH (e.g. less than <10% RH) maintained over the shelf life. In another example, silica gel can maintain a RH of 10-30% over a two-year shelf life.
Suitable desiccant entrained plastic include, but are not limited to, these desiccant plastics disclosed in U.S. Pat. Nos. 5,911,937, 6,214,255, 6,130,263, 6,080,350 and 6,174,952, 6,124,006, and 6,221,446. These references are incorporated herein by reference. By varying the desiccant loading and channeling agent in the plastic formulation, the overall moisture capacity and uptake rate of the desiccant entrained plastic can be controlled. In embodiments where containers include desiccant material, they may be formed by two shot molding techniques.
In yet another embodiment, the assembly includes an elastomeric liner 36 applied to selected regions of the assembly. For example, elastomeric liner may be positioned on the interior surface of the cap portion, lying inside the skirt. Where the lip seals are provided, it may line them as well. In one example, a suitable elastomer is EPDM, commercially available under the trade name Santoprene.
The containers of the present invention are formed of plastic materials, by injection molding or other suitable molding techniques. For example, the containers may be molded of polypropylene. In one embodiment, the containers can be formed as a single closed unit, with the hinge joining the cap portion to the container portion. Alternatively, the pieces can be molded separately, the container portion can be loaded with the item to be retained in the container, and then the container and cap portion can be snap-fit together and/or welded, in order to provide moisture-tightness. In yet another embodiment, the cap and container portions can be formed as separate parts, loaded with the desired item, the container and cap can be fit together, and the parts joined, e.g., by welding (such as by sonic welding or by thermal welding). In yet another embodiment, the cap and container can be formed in a single piece (for example, joined at the hinge), yet open, as in a clamshell arrangement. The assembly can be filled with contents, closed shut, and then joined, e.g., welded to form a seal, as described above.
An embodiment depicting a two-part assembly is illustrated in
At the end of the cap portion 104 that is opposite the hinge, cap latch component 105, depending from the cap base 92, is located. In one embodiment, hooks 107 are provided on the cap latch. 105. In another embodiment, a tab 116, to facilitate opening of the cap portion, when it is closed on the opening 112, is provided on the cap portion.
Upper component 108 has top wall 109 from which sidewalls 110 and sloped wall 115 depend downward. Opening 112 is provided in the top wall 109. In the embodiment relating to hooks, hooks configured to mate with and compliment the hooks 107 on the cap portion 104 are positioned at one end of the upper component 108. At the end opposite where the hooks are positioned, hinge 106 is joined to the upper component 108. The upper component may have a recess 111 for the hinge 106, positioned between elevated portions 109′ of top wall 109.
The tray component 120 is provided with sidewalls 124 and sloped wall 126 depending upward from the base of the tray 122. Sloped wall 126 is complimentary in its shape to the sloped wall 115 of the upper component 108. The side walls define a cavity 128 where items can be stored.
As best seen in
Again, seen in
In the closed position (
The cover component 102 is adapted to fit over the tray component 120, in order to form a container assembly. The cover component and the tray component can be loaded with items to be dispensed through the opening and then joined together, in the ways previously described herein.
As seen in
A desiccant material, such as a desiccant sleeve, can be positioned in the container. As shown in
In one example, the film pieces are about 22 mm wide and about 64 mm long. In another example, the container holds approximately 25 film pieces.
At least some or all of the embodiments of the present invention can be molded according to, for example, techniques disclosed in U.S. Pat. Nos. Re 37,676 (a reissue of U.S. Pat. No. 5,723,085), 4,812,116, and 4,783,056, all of which are incorporated herein by reference.
In yet another embodiment, the container consists of 2-injection molded components that are molded in one-molding operation. One component is the upper housing and the second component is the flip-top closure. The upper housing has an opening along one side of the top surface. This opening provides access by a user to remove the film piece from the container. In one example, the upper housing and flip-top closure is manufactured in one molding operation. In a specific example, the flip-top closure is closed onto the opening in the upper housing in the mold. In yet another specific example, the hinge portion of the flip-top closure is attached to the upper housing ultrasonic welding. This process occurs post molding.
In another embodiment, below the opening in the upper housing is a raised profile, used to guide an individual film strip out of the container by a user. This profile is referred to as the film dispensing guide region. In a specific embodiment, there is space in the upper housing to attach a part made of desiccant entrained plastic. For example, the desiccant entrained plastic is molded in a separate molding operation and is assembled into the upper housing.
In another embodiment as illustrated by
In one example, the barrier film is attached to the perimeter of the upper portion by employing an induction, heat seal or other conventional processes. Using an induction seal process, it is important that the barrier film contain a conductive layer (i.e., aluminum). It is understood that the barrier film may be selected, among other reasons, based on the level of moisture protection and/or rigidity needed for the container. In a specific example, the desiccant entrained plastic may be attached to the seal layer of the barrier film, using a heat staking process.
In a further embodiment, as illustrated by
In a specific example of the use of the present invention, the upper portion with the flip-top closure is supplied to a manufacturer of the film products. The lower portion component made of a plastic (e.g. PE or PP) is also supplied to a manufacturer of film products. In one specific example, the lower portion is made as a 2-shot part and includes a desiccant entrained plastic on the inner portion. The lower portion is placed on the assembly line of the filling station. In one example, the film is cut, stacked and placed onto the lower portion. After filling, the upper portion is placed over the filled lower portion and aligned. Subsequently, the upper portion is snapped onto the lower portion and thus, creating the moisture tight container.
In a further embodiment, as illustrated by
In a specific example of the use of the present invention, the upper portion with the flip-top closure is supplied to a manufacturer of film products. In another example, the upper portion may also contain a desiccant entrained plastic component that is pre assembled into the upper portion before delivery to the film manufacturer. The lower portion is made of materials that are supplied to a manufacturer of the film products. For example, the first material is a thermoplastic (e.g. PE or PP) and the second material is a thermoplastic elastomer (e.g. TPE). As such, thermoplastic elastomer forms a gasket along the perimeter (sealing surface) of the lower portion.
In a specific example of the use of the present invention, the lower portion is placed on the assembly line. In one example, the film is cut, stacked and placed onto the lower portion. After filling, the upper portion is placed over the filled lower portion and aligned. The upper portion is snapped onto the lower portion, creating the moisture tight container. The moisture tight seal is created between the TPE gasket on the upper and the lower portions.
As used herein, the terms “moisture-tight” and “moisture-sensitive” mean the moisture ingress of the container (after three days) was less than about 1500 micrograms of water, preferably, about 750 micrograms of water, more preferably, about 350 micrograms of water determined by the following test method: (a) place one gram plus or minus 0.25 grams of molecular sieve in the container and record the weight; (b) fully close the container; (c) place the closed container in an environmental chamber at conditions of 80% relative humidity and 22 C; (c) after one day, weigh the container containing the molecular sieve; (d) after four days, weigh the container containing the molecular sieve; and (e) subtract the first day sample from the fourth day sample to calculate the moisture ingress of the container in units of micrograms of water.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/US2005/038015 | 10/20/2005 | WO | 00 | 4/19/2007 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2006/045087 | 4/27/2006 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 3784055 | Anderson | Jan 1974 | A |
| 3967756 | Barish | Jul 1976 | A |
| 3986479 | Bonk | Oct 1976 | A |
| 3994417 | Bodecker | Nov 1976 | A |
| 4036360 | Deffeyes | Jul 1977 | A |
| 4281778 | Stull | Aug 1981 | A |
| 4730731 | Allison | Mar 1988 | A |
| 4759463 | Mazoin | Jul 1988 | A |
| 4964539 | Mueller | Oct 1990 | A |
| 5145646 | Tyranski | Sep 1992 | A |
| 5379897 | Muckenfuhs et al. | Jan 1995 | A |
| 5437386 | Von Holdt | Aug 1995 | A |
| 5542567 | Julius | Aug 1996 | A |
| 5699912 | Ishikawa | Dec 1997 | A |
| 5842486 | Davis | Dec 1998 | A |
| 5911937 | Hekal | Jun 1999 | A |
| 6080350 | Hekal | Jun 2000 | A |
| 6092690 | Bitowft | Jul 2000 | A |
| D443450 | Ruhotas | Jun 2001 | S |
| 6412634 | Telesca et al. | Jul 2002 | B1 |
| 6951292 | Bando | Oct 2005 | B2 |
| 7213720 | Giraud | May 2007 | B2 |
| 7537137 | Giraud | May 2009 | B2 |
| 7753228 | Yuhara | Jul 2010 | B2 |
| 20040173612 | Giraud | Sep 2004 | A1 |
| 20050258174 | Giraud | Nov 2005 | A1 |
| 20060196524 | Yuhara | Sep 2006 | A1 |
| 20070023317 | Brozell | Feb 2007 | A1 |
| 20090200326 | Giraud | Aug 2009 | A1 |
| 20090236357 | Giraud | Sep 2009 | A1 |
| Number | Date | Country |
|---|---|---|
| 2428862 | Nov 2004 | CA |
| 0046118 | Aug 2000 | WO |
| 2006045087 | Apr 2006 | WO |
| 2008122771 | Apr 2007 | WO |
| 2008146171 | May 2007 | WO |
| 2008153953 | Jun 2007 | WO |
| 2008153954 | Jun 2007 | WO |
| 2009125267 | Oct 2009 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20080135568 A1 | Jun 2008 | US |
