US20040000503A1 - Recloseable storage bag with porous evacuation portal - Google Patents
Recloseable storage bag with porous evacuation portal Download PDFInfo
- Publication number
- US20040000503A1 US20040000503A1 US10/185,346 US18534602A US2004000503A1 US 20040000503 A1 US20040000503 A1 US 20040000503A1 US 18534602 A US18534602 A US 18534602A US 2004000503 A1 US2004000503 A1 US 2004000503A1
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- Prior art keywords
- bag
- storage bag
- aperture
- sides
- layer
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- Abandoned
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- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000004698 Polyethylene Substances 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002250 absorbent Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 5
- 229920002907 Guar gum Polymers 0.000 claims 1
- 239000004372 Polyvinyl alcohol Substances 0.000 claims 1
- 229920002125 SokalanĀ® Polymers 0.000 claims 1
- 239000001913 cellulose Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 claims 1
- 239000006261 foam material Substances 0.000 claims 1
- 239000000665 guar gum Substances 0.000 claims 1
- 229960002154 guar gum Drugs 0.000 claims 1
- 235000010417 guar gum Nutrition 0.000 claims 1
- 239000004584 polyacrylic acid Substances 0.000 claims 1
- 229920002451 polyvinyl alcohol Polymers 0.000 claims 1
- 239000010410 layer Substances 0.000 description 38
- 239000012790 adhesive layer Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 210000005224 forefinger Anatomy 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 229920006255 plastic film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of bags
Definitions
- the disclosure generally relates to bags and, more particularly, to recloseable food storage bags.
- Reclosable storage bags are well known, especially with regard to food storage. Such bags are generally made out of a plastic film and have two side walls which are sealed around the edges. Such material is fluid impermeable, relatively inexpensive, and can be manufactured in transparent form thereby facilitating content identification. Accordingly, plastic bags have become the dominant product of choice in the area of food storage bags.
- Such bags are typically recloseable and substantially sealable.
- One common approach to provide such features employs closure members at a top edge of a bag having first and second thermoplastic layers folded or heat sealed along bottom and first and second side edges.
- the closure members may be provided in the form of mating male and female profiles such as those provided by the present assignee under the ZIPLOCĀ® trademark.
- the male and female profiles are also typically manufactured from plastic, with the male profile including a linear tab adapted to be interlocked with a linear groove of the female profile.
- the male and female profiles can be connected to close the bag by pinching and pulling across the closure members along the length of the top edges. Such motion can be accomplished with the thumb and forefinger of a user, or through the use of a sliding element mounted to the male and female profiles, as is the case with bags provided by the present assignee under the ZIPLOCĀ® trademark as well.
- a recloseable storage bag which may include first and second sides attached along bottom, left, and right sides, primary closure members provided proximate top edges, an aperture in one of the sides, and a secondary closure element associated with the aperture.
- the secondary closure element may be made of a porous material.
- a method of evacuating gas from a recloseable storage bag may include providing a bag, closing the bag using primary closure members positioned at a top of the bag, and compressing the bag to force gas through the aperture and secondary closure element.
- the bag may have first and second sides connected along first and second side edges.
- the bag may include a top and a bottom with the bottom being closed and the top being adapted to be opened and closed using the primary closure members.
- the bag may further include an aperture in at least one of the sides, with the secondary closure element being operatively associated with the aperture and being porous.
- a recloseable storage bag which may include a first side, a second side, primary closure members, and means for evacuating gas from the bag after the primary closure members are closed, the means for evacuating including at least one aperture covered by a porous layer.
- FIG. 1 is a front view of bag constructed in accordance with the teachings of the disclosure
- FIG. 2 is sectional view of the bag of FIG. 1 taken along line 2 - 2 of FIG. 1;
- FIG. 3 is a front view of first alternative embodiment of a bag constructed in accordance with the teachings of the disclosure
- FIG. 4 is an enlarged plan view of the secondary closure element of FIG. 3;
- FIG. 5 is an enlarged plan view of an alternative embodiment of the secondary closure element
- FIG. 6 is an exploded view of a second alternative embodiment of the secondary closure element
- FIG. 7 is an exploded view of a third alternative embodiment of the secondary closure element.
- FIG. 8 is a perspective view of a fourth alternative embodiment of the secondary closure element.
- a recloseable storage bag constructed in accordance with the teachings of the disclosure is generally referred to by reference numeral 20 . While the bag 20 will be described herein with predominant reference to food storage bags such as those sold by the assignee under its ZIPLOCĀ® trademark, it is to be understood that the teachings of the disclosure could be employed in any other type of bag, such as but not limited to bags used to store perishable goods other than food, as well as bags which are not intended to be recloseable.
- the bag 20 is shown to include a first side wall 22 joined to a second side wall 24 . More specifically, the first side 22 includes a left edge 26 , a right edge 28 , a bottom edge 30 , and a top edge 32 , while the second side 24 includes a left edge 34 , a right edge 36 , a bottom edge 38 , and a top edge 40 .
- the respective left edges 26 , 34 are joined together, as are the respective right edges 28 , 36 , and the respective bottom edges 30 , 38 .
- edges can be formed by heat sealing, ultrasonic welding, impulsing welding, or the like, or can be integral and simply separated by a fold.
- bags 20 are typically manufactured from polyethylene or similar plastic material, it has been found to be advantageous to form one edge, e.g., the bottom edge, with a fold, and the other two edges, e.g., the left and right edges, with heat seals.
- the top edges 32 , 40 are not permanently closed, but rather are provided with recloseable primary closure members 42 a , 42 b .
- the primary closure elements are depicted in the form of mating male and female profiles, wherein the male profile 42 a includes three ribs 44 , while the female profile includes two ribs 46 .
- the primary closure members 42 a , 42 b can be joined using a pinch-and-seal motion with the thumb and forefinger. Such pressure causes the ribs 44 and 46 to frictionally intermesh in alternating fashion, thereby substantially sealing the bag.
- a slider or the like can be provided to facilitate such zipper action.
- the primary closure members 42 a , 42 b need not be provided in such zipper fashion, but could be provided in any other suitable fashion such as, but not limited to, adhesive fasteners, hook and loop fasteners, invertable folds, buttons, clips, and the like.
- the bag 20 is formed to have an interior storage space 48 accessible between the top edges 32 , 40 when the primary closure members 42 a , 42 b are open. After the primary closure members 42 a , 42 b are closed, the bag 20 is substantially sealed.
- an aperture 50 may be provided in one or more of the side walls 22 , 24 . As shown best in FIG. 2, the aperture 50 may be provided in the first side wall 22 to enable gas to exit the storage space 48 as by compressing the bag 20 , or otherwise manipulating the bag 20 , to force excess air from the space 48 to the atmosphere through the aperture 50 .
- the bag 20 may further include a secondary closure element 52 adapted to close the aperture 50 .
- the secondary closure element 52 is provided in the form of a porous layer 54 positioned over the aperture 50 and attached to the side wall 22 .
- the porous layer 54 may be provided from any suitable material enabling gas to be dissipated therethrough.
- the porous layer 54 may be provided from a nonwoven polymer such as spun bond, melt blown, or spun bond-melt blown-spun bond (SMS) polyethylene.
- SMS spun bond-melt blown-spun bond
- the basis weight of such material may be in the range of 0.1 OSY to 50 OSY.
- the porous layer 54 may be in the form of a foam of open cell structure, made of polyethylene, or other compatible material.
- the porous layer 54 may be in the form of closed cell polyethylene foam, which is subsequently machined or pierced to be open celled. Other materials such as, but not limited to, other porous polymers, foams, sponges, meshes, and one-way valves, are certainly possible.
- the porous layer 54 may be any suitable shape such as, but not limited to rectangular and circular, and is only limited in size by the size of the aperture 50 .
- FIGS. 1 and 2 will enable excess gas to be expelled from the bag 20 after the primary closure members 42 a and 42 b are closed, it may be further advantageous to additionally provide a mechanism by which the liquid within the interior space 48 is substantially preventing from exiting the bag 20 through the aperture 50 . For example, if a frozen good is placed within the bag 20 , the water resulting from thawing can be prevented from exiting through the aperture 50 .
- FIG. 3 One apparatus for doing so is shown in the form of a bag 120 depicted in FIG. 3.
- the secondary closure member 152 may be further provided with a non-porous layer 156 .
- the numbering system will repeat like reference numerals for like elements employed in the various embodiments, with the exception that each embodiment will have its own, sequential prefix. Accordingly, the embodiment of FIG. 3 will use reference numerals having a one hundred series prefix, and later described embodiments will have a two-hundred series prefix, three-hundred series prefix and so on.
- the non-porous layer 156 is provided over the porous layer 154 , which itself is provided over the bag aperture 150 . More specifically, outer edges 158 of the porous layer are joined to the bag 120 over the aperture 150 , as by heat sealing, ultrasonic welding, or the like. Similarly, outer edges 160 of the non-porous layer 156 are attached to the bag 120 over the porous layer 154 .
- the non-porous layer 156 is made sufficiently larger than the porous layer 154 to facilitate such attachment.
- the non-porous layer 156 is shown in greater detail to include at least one perforation 162 .
- the perforation 162 is provided in a band 164 outside the outer edges 158 of the porous layer 154 .
- the perforations 162 are provided in the form of slits, while in the embodiment of FIG. 5, the perforations 162 are provided in the form of circular apertures. Other shapes, as well as their spacings and numbers, are certainly possible.
- a benefit provided by the perforations 162 is that they assist in forming an air flow passageway from the interior space 148 to the atmosphere through the aperture 150 .
- the gas within the space 148 is forced first through the aperture, and then through the porous layer 154 .
- the gas pushes the non-porous layer 156 away from the porous layer 154 and exits through the perforations 162 .
- a benefit of providing the non-porous layer 156 itself is its ability to substantially prevent liquid within the interior space 148 from exiting the bag 120 through the aperture 150 . More specifically, if liquid within the interior space 148 attempts to exit the bag 120 through the aperture 150 , it first passes through the porous layer 154 and then comes into contact with the non-porous layer 156 . Upon contact the porous layer 154 and non-porous layer 156 adhere together due to surface tension. As a result, the liquid cannot access the perforations 162 , and thus cannot exit the bag 120 . In so doing, it can be seen that the bag 120 is provided both with a means for evacuating air from the bag after primary closing, and means for preventing liquid from exiting the bag through the means for evacuating air.
- an adhesive layer 264 is provided on the non-porous layer 256 in a position adjacent the porous layer 254 .
- the adhesive layer 264 may be provided in the form of water-sensitive adhesive such that it activates upon contact with water.
- other types of adhesive such as those which activate upon contact with certain other liquids, or at a certain temperature, can be employed as well.
- the non-porous layer can be avoided.
- the secondary closure element 352 can be provided in the form of a first porous layer 354 , a second porous layer 366 , and an adhesive layer 364 therebetween.
- the adhesive layer 364 may include a plurality of perforations 368 .
- the secondary closure element 452 can be provided in the form of a porous layer 454 provided with absorbent or super absorbent particles 470 embedded, or otherwise provided, therein. Gas within the bag 420 is able to exit through the aperture 450 and through porous layer 454 . When liquid attempts to exit through the aperture, the superabsorbent particles absorb the liquid and thereby prevent the liquid from exiting the bag 420 .
Abstract
A recloseable storage bag is disclosed which may include first and second sides having closed sides and an open top. Primary closure members may be provided proximate the top, with a secondary closure element being provided in one of the sides to enable gas to be evacuated from the bag after the primary closure members are closed. The secondary closure member may further include the ability to prevent liquid from exiting the bag therethrough.
Description
- The disclosure generally relates to bags and, more particularly, to recloseable food storage bags.
- Reclosable storage bags are well known, especially with regard to food storage. Such bags are generally made out of a plastic film and have two side walls which are sealed around the edges. Such material is fluid impermeable, relatively inexpensive, and can be manufactured in transparent form thereby facilitating content identification. Accordingly, plastic bags have become the dominant product of choice in the area of food storage bags.
- Such bags are typically recloseable and substantially sealable. One common approach to provide such features employs closure members at a top edge of a bag having first and second thermoplastic layers folded or heat sealed along bottom and first and second side edges. The closure members may be provided in the form of mating male and female profiles such as those provided by the present assignee under the ZIPLOCĀ® trademark. The male and female profiles are also typically manufactured from plastic, with the male profile including a linear tab adapted to be interlocked with a linear groove of the female profile.
- The male and female profiles can be connected to close the bag by pinching and pulling across the closure members along the length of the top edges. Such motion can be accomplished with the thumb and forefinger of a user, or through the use of a sliding element mounted to the male and female profiles, as is the case with bags provided by the present assignee under the ZIPLOCĀ® trademark as well.
- While such bags have been met with extraordinary commercial success from their inception until the present day, the assignee continues to improve its product offerings. One area which the assignee has identified as grounds for improvement involves the ability to evacuate gas from a bag after sealing. While the primary closure found at the top of many plastic bags provides an airtight seal, air remaining enclosed in the bag after closure enables bacterial growth and therefore hinders the preservation and freshness the bags are intended to maintain.
- It would therefore be an advance in the art of bags to provide a bag with an evacuation aperture provided with a secondary closure, or valve, for sealing the aperture. In this manner, a bag may be closed at the top using the primary closure member, as described above, and subsequently evacuated of gas and resealed using the aperture and secondary closure, respectively.
- In accordance with one aspect of the disclosure, a recloseable storage bag is disclosed which may include first and second sides attached along bottom, left, and right sides, primary closure members provided proximate top edges, an aperture in one of the sides, and a secondary closure element associated with the aperture. The secondary closure element may be made of a porous material.
- In accordance with another aspect of the disclosure, a method of evacuating gas from a recloseable storage bag is disclosed which may include providing a bag, closing the bag using primary closure members positioned at a top of the bag, and compressing the bag to force gas through the aperture and secondary closure element. The bag may have first and second sides connected along first and second side edges. The bag may include a top and a bottom with the bottom being closed and the top being adapted to be opened and closed using the primary closure members. The bag may further include an aperture in at least one of the sides, with the secondary closure element being operatively associated with the aperture and being porous.
- In accordance with another aspect of the disclosure, a recloseable storage bag is disclosed which may include a first side, a second side, primary closure members, and means for evacuating gas from the bag after the primary closure members are closed, the means for evacuating including at least one aperture covered by a porous layer.
- These and other aspects and features of the disclosure will become more apparent upon reading the following detailed description when taken in conjunction with the accompanying drawings.
- FIG. 1 is a front view of bag constructed in accordance with the teachings of the disclosure;
- FIG. 2 is sectional view of the bag of FIG. 1 taken along line2-2 of FIG. 1;
- FIG. 3 is a front view of first alternative embodiment of a bag constructed in accordance with the teachings of the disclosure;
- FIG. 4 is an enlarged plan view of the secondary closure element of FIG. 3;
- FIG. 5 is an enlarged plan view of an alternative embodiment of the secondary closure element;
- FIG. 6 is an exploded view of a second alternative embodiment of the secondary closure element;
- FIG. 7 is an exploded view of a third alternative embodiment of the secondary closure element; and
- FIG. 8 is a perspective view of a fourth alternative embodiment of the secondary closure element.
- While the disclosure is susceptible to various modifications and alternative embodiments, certain illustrative embodiments thereof have been shown in the drawings and will be described below in detail. It should be understood, however, that there is no intention to limit the disclosure to the specific forms disclosed, but on the contrary, the intention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the disclosure as defined by the appended claims.
- Referring now to the drawings, and with specific reference to FIG. 1, a recloseable storage bag constructed in accordance with the teachings of the disclosure is generally referred to by reference numeral20. While the bag 20 will be described herein with predominant reference to food storage bags such as those sold by the assignee under its ZIPLOCĀ® trademark, it is to be understood that the teachings of the disclosure could be employed in any other type of bag, such as but not limited to bags used to store perishable goods other than food, as well as bags which are not intended to be recloseable.
- With reference again to FIG. 1, as well as FIG. 2, the bag20 is shown to include a
first side wall 22 joined to asecond side wall 24. More specifically, thefirst side 22 includes aleft edge 26, aright edge 28, abottom edge 30, and atop edge 32, while thesecond side 24 includes aleft edge 34, aright edge 36, abottom edge 38, and a top edge 40. The respectiveleft edges right edges respective bottom edges - The
top edges 32, 40, however, are not permanently closed, but rather are provided with recloseable primary closure members 42 a, 42 b. The primary closure elements are depicted in the form of mating male and female profiles, wherein the male profile 42 a includes three ribs 44, while the female profile includes two ribs 46. As will be readily understood by one of ordinary skill in the art, the primary closure members 42 a, 42 b can be joined using a pinch-and-seal motion with the thumb and forefinger. Such pressure causes the ribs 44 and 46 to frictionally intermesh in alternating fashion, thereby substantially sealing the bag. A slider or the like can be provided to facilitate such zipper action. In other embodiments, the primary closure members 42 a, 42 b need not be provided in such zipper fashion, but could be provided in any other suitable fashion such as, but not limited to, adhesive fasteners, hook and loop fasteners, invertable folds, buttons, clips, and the like. - In so doing, the bag20 is formed to have an
interior storage space 48 accessible between thetop edges 32, 40 when the primary closure members 42 a, 42 b are open. After the primary closure members 42 a, 42 b are closed, the bag 20 is substantially sealed. In order to remove excess gas, such as air, from theinterior storage space 48, anaperture 50 may be provided in one or more of theside walls aperture 50 may be provided in thefirst side wall 22 to enable gas to exit thestorage space 48 as by compressing the bag 20, or otherwise manipulating the bag 20, to force excess air from thespace 48 to the atmosphere through theaperture 50. - The bag20 may further include a
secondary closure element 52 adapted to close theaperture 50. In the embodiment of FIGS. 1 and 2, thesecondary closure element 52 is provided in the form of aporous layer 54 positioned over theaperture 50 and attached to theside wall 22. Theporous layer 54 may be provided from any suitable material enabling gas to be dissipated therethrough. For example, theporous layer 54 may be provided from a nonwoven polymer such as spun bond, melt blown, or spun bond-melt blown-spun bond (SMS) polyethylene. The basis weight of such material may be in the range of 0.1 OSY to 50 OSY. Alternatively, theporous layer 54 may be in the form of a foam of open cell structure, made of polyethylene, or other compatible material. In still further alternatives, theporous layer 54 may be in the form of closed cell polyethylene foam, which is subsequently machined or pierced to be open celled. Other materials such as, but not limited to, other porous polymers, foams, sponges, meshes, and one-way valves, are certainly possible. Theporous layer 54 may be any suitable shape such as, but not limited to rectangular and circular, and is only limited in size by the size of theaperture 50. - While the embodiment of FIGS. 1 and 2 will enable excess gas to be expelled from the bag20 after the primary closure members 42 a and 42 b are closed, it may be further advantageous to additionally provide a mechanism by which the liquid within the
interior space 48 is substantially preventing from exiting the bag 20 through theaperture 50. For example, if a frozen good is placed within the bag 20, the water resulting from thawing can be prevented from exiting through theaperture 50. - One apparatus for doing so is shown in the form of a
bag 120 depicted in FIG. 3. As shown therein, thesecondary closure member 152 may be further provided with anon-porous layer 156. At this point it is important to note that with regard to the various embodiments disclosed herein, the numbering system will repeat like reference numerals for like elements employed in the various embodiments, with the exception that each embodiment will have its own, sequential prefix. Accordingly, the embodiment of FIG. 3 will use reference numerals having a one hundred series prefix, and later described embodiments will have a two-hundred series prefix, three-hundred series prefix and so on. - The
non-porous layer 156 is provided over theporous layer 154, which itself is provided over thebag aperture 150. More specifically, outer edges 158 of the porous layer are joined to thebag 120 over theaperture 150, as by heat sealing, ultrasonic welding, or the like. Similarly, outer edges 160 of thenon-porous layer 156 are attached to thebag 120 over theporous layer 154. Thenon-porous layer 156 is made sufficiently larger than theporous layer 154 to facilitate such attachment. - Turning now to FIGS. 4 and 5, the
non-porous layer 156 is shown in greater detail to include at least oneperforation 162. Theperforation 162 is provided in a band 164 outside the outer edges 158 of theporous layer 154. In the embodiment of FIG. 4, theperforations 162 are provided in the form of slits, while in the embodiment of FIG. 5, theperforations 162 are provided in the form of circular apertures. Other shapes, as well as their spacings and numbers, are certainly possible. A benefit provided by theperforations 162 is that they assist in forming an air flow passageway from the interior space 148 to the atmosphere through theaperture 150. More specifically, when thebag 120 is compressed with the primary closure members 142 a, 142 b closed, the gas within the space 148 is forced first through the aperture, and then through theporous layer 154. As the outer edges 160 ofnon-porous layer 156 are sealed to thebag 120, the gas pushes thenon-porous layer 156 away from theporous layer 154 and exits through theperforations 162. - A benefit of providing the
non-porous layer 156 itself is its ability to substantially prevent liquid within the interior space 148 from exiting thebag 120 through theaperture 150. More specifically, if liquid within the interior space 148 attempts to exit thebag 120 through theaperture 150, it first passes through theporous layer 154 and then comes into contact with thenon-porous layer 156. Upon contact theporous layer 154 andnon-porous layer 156 adhere together due to surface tension. As a result, the liquid cannot access theperforations 162, and thus cannot exit thebag 120. In so doing, it can be seen that thebag 120 is provided both with a means for evacuating air from the bag after primary closing, and means for preventing liquid from exiting the bag through the means for evacuating air. - In the alternative embodiment of FIG. 6, an
adhesive layer 264 is provided on the non-porous layer 256 in a position adjacent theporous layer 254. In so doing, the twolayers 254 and 256 are not joined only by surface tension upon contact with liquid, but by theadhesive layer 264 as well. Theadhesive layer 264 may be provided in the form of water-sensitive adhesive such that it activates upon contact with water. In other embodiments, other types of adhesive, such as those which activate upon contact with certain other liquids, or at a certain temperature, can be employed as well. - In yet another alternative embodiment, depicted in exploded fashion in FIG. 7, the non-porous layer can be avoided. More specifically, the
secondary closure element 352 can be provided in the form of a firstporous layer 354, a secondporous layer 366, and anadhesive layer 364 therebetween. Theadhesive layer 364 may include a plurality ofperforations 368. When such asecondary closure element 352 is not exposed to liquid, the gas contained with the bag can exit through the bag aperture and pass first through the firstporous layer 354, then through theperforations 368 in theadhesive layer 364, and then through the secondporous layer 366 to the atmosphere. However, upon contact with liquid, the adhesive becomes active thereby joining the first and secondporous layers perforations 368. The liquid is thereby prevented from exiting the bag 320. - In a still further embodiment, the
secondary closure element 452 can be provided in the form of aporous layer 454 provided with absorbent or superabsorbent particles 470 embedded, or otherwise provided, therein. Gas within the bag 420 is able to exit through the aperture 450 and throughporous layer 454. When liquid attempts to exit through the aperture, the superabsorbent particles absorb the liquid and thereby prevent the liquid from exiting the bag 420. - From the foregoing, it will be readily understood by those of ordinary skill in the art that the teachings of this disclosure can be used to construct a recloseable storage bag having a primary closure member for closing the bag, and a secondary closure member for evacuating gas from the bag after primary closing.
Claims (32)
1. A recloseable storage bag, comprising:
a first side having a bottom edge, left edge, right edge, and top edge;
a second side having a bottom edge, left edge, right edge, and top edge, the bottom edges of the first and second sides being attached, the left edges of the first and second sides being attached, and the right edges of the first and second sides being attached;
primary closure members provided proximate the top edges of the first and second sides;
an aperture in at least one of the first and second sides; and
a secondary closure element associated with the aperture, the secondary closure element being porous.
2. The storage bag of claim 1 , wherein the secondary closure element includes a layer of foam positioned over the aperture.
3. The storage bag of claim 2 , wherein the foam is manufactured from polyethylene.
4. The storage bag of claim 3 , wherein the polyethylene is manufactured to have an open cell structure.
5. The storage bag of claim 3 , wherein the polyethylene is manufactured to have a closed cell structure and is subsequently punctured to form an open cell structure.
6. The storage bag of claim 1 , wherein the secondary closure element is made of non-woven polyethylene.
7. The storage bag of claim 6 , wherein the non-woven polyethylene is made of one of spun bond, melt blown, and spun bond-melt blown-spun bond polyethylene.
8. The storage bag of claim 7 , wherein the non-woven polyethylene has a basis weight in the range of 0.1 OSY to 50 OSY.
9. The storage bag of claim 1 , wherein the secondary closure element further includes a liquid impervious layer.
10. The storage bag of claim 9 , wherein the liquid impervious layer includes at least one perforation positioned so as not to be aligned with the bag aperture.
11. The storage bag of claim 9 , wherein the liquid impervious layer is made of polyethylene.
12. The storage bag of claim 10 , wherein the perforation is provided in the form of a slit.
13. The storage bag of claim 10 , wherein the liquid impervious layer has a layer of water sensitive adhesive applied thereto in alignment with the bag aperture.
14. The storage baa of claim 10 , wherein the secondary closure element includes a layer of water sensitive material sandwiched between first and second layers of water insensitive material.
15. The storage bag of claim 14 , wherein the water sensitive material is selected from the group consisting of polyvinyl alcohol, cellulose, and water sensitive gums.
16. The storage bag of claim 15 , wherein the water sensitive gum is guar gum.
17. The storage bag of claim 1 , wherein the secondary closure element is one of a non-woven material and a foam having super-absorbent particles embedded therein.
18. The storage bag of claim 17 , wherein the super-absorbent particles are made of cross-linked polyacrylic acid.
19. A method of evacuating air from a recloseable storage bag, comprising the steps of:
providing a bag having first and second sides connected along first and second side edges thereof, the bag further including a top and bottom, the bottom being closed, the top being adapted to open and close using primary closure members provided proximate the top edges of the first and second sides, the bag further including an aperture in at least one of the first and second sides, and a secondary closure element operatively associated with the aperture, the secondary closure element being porous;
closing the bag using the primary closure members positioned at the top of the sides; and
compressing the bag to force gas out of the bag through the aperture and secondary closure element.
20. The method of claim 19 , further including the step of preventing liquid flow through the aperture.
21. The method of claim 20 , wherein the preventing step is performed by providing the secondary closure element in the form of a liquid impervious layer and a porous layer.
22. The method of claim 21 , wherein the liquid impervious layer includes at least one perforation.
23. The method of claim 21 , wherein the preventing step is performed by providing a water-sensitive adhesive on the liquid impervious layer and bonding the liquid impervious layer to the bag when liquid attempts to exit the bag through the aperture.
24. The method of claim 21 , wherein the preventing step is performed by providing absorbent particles in association with the liquid impervious layer, the absorbent particles absorbing liquid when the liquid attempts to exit the bag through the aperture.
25. A recloseable storage bag, comprising:
a first side having a bottom edge, left edge, right edge, and top edge;
a second side having a bottom edge, left edge, right edge, top edge, and the bottom edges of the first and second sides being attached, the left edges of the first and second sides being attached, and the right edges of the first and second sides being attached;
primary closure members provided proximate the top edges of the first and second sides; and
means for evacuating gas from the bag after the primary closure members are sealed, the means for evacuating including at least one aperture covered by a porous layer.
26. The reclosable storage bag of claim 25 , wherein the means for evacuating includes a layer of non-woven material.
27. The reclosable storage bag of claim 25 , wherein the means for evacuating includes a layer of foam material.
28. The reclosable storage bag of claim 25 , wherein the means for evacuating is made of polyethylene.
29. The reclosable storage bag of claim 25 , further including means for preventing liquid from the exiting the bag through the means for evacuating.
30. The reclosable storage bag of claim 29 , wherein the means for preventing includes a layer of liquid impervious material proximate the aperture.
31. The recloseable storage bag of claim 30 , wherein the means for preventing further includes a layer of water-sensitive adhesive.
32. The recloseable storage bag of claim 30 , means for preventing further includes absorbent particles.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/185,346 US20040000503A1 (en) | 2002-06-28 | 2002-06-28 | Recloseable storage bag with porous evacuation portal |
JP2004518070A JP2005531469A (en) | 2002-06-28 | 2003-06-27 | Openable / closable storage bag with porous evacuation portal |
CA002490624A CA2490624C (en) | 2002-06-28 | 2003-06-27 | Recloseable storage bag with porous evacuation portal |
EP03742315A EP1517839A1 (en) | 2002-06-28 | 2003-06-27 | Recloseable storage bag with porous evacuation portal |
PCT/US2003/020478 WO2004002840A1 (en) | 2002-06-28 | 2003-06-27 | Recloseable storage bag with porous evacuation portal |
BR0305075-0A BR0305075A (en) | 2002-06-28 | 2003-06-27 | Resealable storage bag with porous evacuation portal |
AU2003280432A AU2003280432A1 (en) | 2002-06-28 | 2003-06-27 | Recloseable storage bag with porous evacuation portal |
MXPA04012999A MXPA04012999A (en) | 2002-06-28 | 2003-06-27 | Recloseable storage bag with porous evacuation portal. |
US10/823,261 US7137738B2 (en) | 2002-06-28 | 2004-04-13 | Recloseable storage bag with porous evacuation portal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/185,346 US20040000503A1 (en) | 2002-06-28 | 2002-06-28 | Recloseable storage bag with porous evacuation portal |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/823,261 Division US7137738B2 (en) | 2002-06-28 | 2004-04-13 | Recloseable storage bag with porous evacuation portal |
Publications (1)
Publication Number | Publication Date |
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US20040000503A1 true US20040000503A1 (en) | 2004-01-01 |
Family
ID=29779606
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/185,346 Abandoned US20040000503A1 (en) | 2002-06-28 | 2002-06-28 | Recloseable storage bag with porous evacuation portal |
US10/823,261 Expired - Lifetime US7137738B2 (en) | 2002-06-28 | 2004-04-13 | Recloseable storage bag with porous evacuation portal |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/823,261 Expired - Lifetime US7137738B2 (en) | 2002-06-28 | 2004-04-13 | Recloseable storage bag with porous evacuation portal |
Country Status (8)
Country | Link |
---|---|
US (2) | US20040000503A1 (en) |
EP (1) | EP1517839A1 (en) |
JP (1) | JP2005531469A (en) |
AU (1) | AU2003280432A1 (en) |
BR (1) | BR0305075A (en) |
CA (1) | CA2490624C (en) |
MX (1) | MXPA04012999A (en) |
WO (1) | WO2004002840A1 (en) |
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Publication number | Publication date |
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WO2004002840A1 (en) | 2004-01-08 |
MXPA04012999A (en) | 2005-05-16 |
JP2005531469A (en) | 2005-10-20 |
AU2003280432A1 (en) | 2004-01-19 |
US7137738B2 (en) | 2006-11-21 |
CA2490624A1 (en) | 2004-01-08 |
CA2490624C (en) | 2008-05-27 |
EP1517839A1 (en) | 2005-03-30 |
US20040223667A1 (en) | 2004-11-11 |
BR0305075A (en) | 2004-09-21 |
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