WO2003000564A1 - Storage bag with one-way air valve - Google Patents

Storage bag with one-way air valve Download PDF

Info

Publication number
WO2003000564A1
WO2003000564A1 PCT/US2002/016909 US0216909W WO03000564A1 WO 2003000564 A1 WO2003000564 A1 WO 2003000564A1 US 0216909 W US0216909 W US 0216909W WO 03000564 A1 WO03000564 A1 WO 03000564A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
valve strip
edge
valve
bonded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2002/016909
Other languages
English (en)
French (fr)
Inventor
Brent G. Anderson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
New West Products Inc
Original Assignee
New West Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New West Products Inc filed Critical New West Products Inc
Priority to KR1020037016849A priority Critical patent/KR100918072B1/ko
Priority to DE60213408T priority patent/DE60213408T2/de
Priority to JP2003506779A priority patent/JP4015617B2/ja
Priority to EP02731966A priority patent/EP1399367B1/en
Priority to AU2002303901A priority patent/AU2002303901B2/en
Priority to CA002452193A priority patent/CA2452193C/en
Publication of WO2003000564A1 publication Critical patent/WO2003000564A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2023—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in a flexible container
    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/18—Containers, packaging elements or packages, specially adapted for particular articles or materials for wearing apparel, headwear or footwear
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum

Definitions

  • the present invention relates to storage bags, and in particular to reusable evacuable storage bags with integral one-way air valves.
  • Evacuable flexible storage bags allow a user to compress and subsequently store and carry bulky items, e.g., clothing.
  • Such bags are typically made of plastic and include an airtight seal . After placing one or more items inside the bag, the user partially closes the seal. The user then presses on the bag to force air through the remaining opening in.the seal. Once air is forced through the opening, the user fully closes the seal and the stored items remain compressed by ambient air pressure.
  • Such bags are difficult to use.
  • One problem with many current airtight storage bags is that some air may leak back into the bag as the user attempts to close the seal .
  • Another problem is that forces on the bag during compressing tend to fully open the partially closed seal, thus requiring the user to fully close the seal once the bag is compressed.
  • Yet another problem is that many users find it awkward to maintain compression force on the bag while fully closing the seal.
  • Still another problem is low cabin pressure during air travel may cause air inside the bag to expand and open the seal.
  • U.S. Patent No. 5,540,500 discloses a sealed bag including a check valve.
  • the ⁇ 500 patent discloses a check valve including at least two rectangular plastic films. The plastic films are bonded together to form a flat pipe that extends between the storage bag body and a covering envelope. However, articles placed in the bag may fold the pipe back on itself and block the valve. And the covering envelope is required to protect the valve portion extending from the bag body.
  • a flexible, evacuable storage bag includes a one-way air valve that has a single strip bonded between the top and bottom sheets used to make the bag.
  • the bag also includes an airtight seal through which the user places one or more items to be stored into the bag .
  • the valve strip is sandwiched between the top and bottom sheets.
  • the strip is bonded along the strip' s edges to the top and bottom sheets to form two passageways.
  • the strip is bonded along the strip's edges to form a single passageway.
  • the passageways extend from the storage portion of the bag to the outside. The user may, for example, insert one or more items to be stored through the opening and closes the airtight seal .
  • FIG. 1 is a plan view of an embodiment of the invention.
  • FIG. 2 is an exploded perspective view of an embodiment of the invention.
  • FIGs . 3a, 3b, and 3c are perspective views showing one method of using the invention.
  • FIG. 4 is an exploded perspective view of a second embodiment of the invention.
  • FIG. 5 is an exploded perspective view of a valve embodiment .
  • FIG. 1 is a plan view of a flexible storage bag 10 in accordance with the invention.
  • bag 10 has a storage portion 12 formed by bonding two flexible plastic sheets along edges 13a, 13b, and 13c.
  • FIG. 1 shows bag 10 as rectangular, although other embodiments may have other shapes.
  • Airtight seal 14 is placed in opening 15 between the two sheets. When seal 14 is open, a user places one or more items to be stored through opening 15 into storage portion 12 and then closes seal 14.
  • a valve 16 allows air to pass in one direction from storage portion 12 to outside bag 10. As shown, valve 16 is positioned along edge 13c of storage portion 12, opposite seal 14, but in other embodiments valve 16 may be placed along another edge of storage portion 12.
  • FIG. 2 is an exploded perspective view of bag 10.
  • bag 10 includes a top sheet 20 and a bottom sheet 22.
  • sheets 20 and 22 are each a layer of conventional extruded low density polyethylene sandwiched between a conventional layer of nylon sheeting and a conventional layer of linear low density polyethylene.
  • Other embodiments may use different material.
  • sheets 20 and 22 are bonded along edges 13a, 13b, and 13c. In one embodiment bonding is done using conventional resistive heating. Other embodiments may use different bonding methods .
  • Bag 10 also includes top portion 24 and bottom portion 26 of airtight seal 14. Top portion 24 is bonded to top sheet 20 using conventional resistive heating. Similarly, bottom portion 26 is bonded to bottom sheet 22 using resistive heating. Other bonding methods may be used.
  • seal 14 is a conventional interlocking resealable airtight fastener.
  • the fastener is manufactured by MiniGrip ZIP-PAK, an ITW Company, with a marketing office located at 27001 La Plaz, Suite 400, Mission Viejo CA 92691.
  • Other embodiments may use other airtight seals that are either resealable or permanent.
  • FIG. 2 shows valve strip 28 placed between top sheet 20 and bottom sheet 22.
  • valve strip 28 is a single sheet of conventional blended low density polyethylene with high slip. Other embodiments may use different materials.
  • valve strip 28 is bonded between top sheet 20 and bottom sheet 22 along edges 29a and 29b.
  • bonding is done using conventional resistive heating. Other embodiments may use different bonding methods.
  • Valve strip 28 is positioned so that after bonding edges 29a and 29b two passageways are created.
  • the top passageway is between top sheet 20 and valve strip 28.
  • the bottom passageway is between bottom sheet 22 and valve strip 28.
  • bonded side 29b of valve strip 28 is coincident with bonded bottom edges 13c of top sheet 20 and bottom sheet 22.
  • strip 28 extends from edge 13a to edge 13b. In other embodiments strip 28 may be shortened so as not to reach either or both edges 13a or 13b.
  • each unique top and bottom passageway 30a and 30b (hidden behind passageway 30a) , respectively, has at one end an opening 31 into storage portion 12 and at the other end an opening 32 to the environment outside bag 10.
  • each passageway has a width Wl of 1.00 inches.
  • the width W2 of openings 31 and 32 are each 1.50 inches.
  • Other embodiments may use other dimensions for widths Wl and W2.
  • the widths of openings 31 and 32 need not be identical.
  • Top sheet 20 and bottom sheet 22 normally contact the surface of valve strip 28 when no air or other substance (e.g., water) is in either passageway.
  • airtight seal 14 is closed and the pressure inside storage portion 12 is made greater than the ambient pressure, air passes through openings 31, travels along passageways 30a and 30b, and exits through openings 32. The ambient pressure then closes passageways 30a and 30b by pressing top sheet 20 and bottom sheet 22 against valve strip 28. Air is therefore prevented from returning to storage portion 12.
  • FIGs . 3a-3c illustrate one use of the present invention.
  • a user opens seal 14 and places an item to be stored through opening 15 into storage portion 12.
  • the user then closes bag 10 by making seal 14 airtight, as depicted in FIG. 3b.
  • the user expels air by rolling, beginning at an edge opposite valve 16, bag 10 towards valve 16.
  • FIG. 3c shows that as the user rolls, air as represented by the arrows passes from storage portion 12 through openings 31, along the passages, and exits through openings 32.
  • the user then unrolls the bag containing the stored item.
  • Storage portion 12 remains partially evacuated and ambient air pressure prevents air from returning through the passages.
  • FIG. 4 is an exploded perspective view of a second embodiment of the invention. The embodiment illustrated by FIG.
  • Top sheet 40 and bottom sheet 42 are bonded (e.g., using heat) along side edges 40a, 42a and opposite side edges 40b, 42b, respectively.
  • the shaded portions in the drawings are illustrative of the bonded areas on sheets 40,42.
  • a conventional resealable air-tight seal 44 e.g., MiniGrip ZIP-PAK fastener
  • One-way air valve 46 is formed at bottom edges 40d,42d of sheets 40,42, respectively.
  • sheets 40,42 each are made of an outer layer of biaxially oriented nylon and an inner (i.e., adjacent storage portion 48) layer of polyethylene, which acts as a good sealant layer. Other materials may be used for the outer layer, such as polyester or polypropylene.
  • the user opens seal 44 and places an item to be stored into storage portion 48. The user then closes seal 44 and forces air from storage portion 48 through oneway valve 46.
  • valve strip 52 is sandwiched between sheets 40,42 adjacent bottom edges 40d,42d, respectively.
  • Valve strip 52 is rectangular and has long edges 52a and 52b, and short edges 52c and 52d. Edges 52a, 52b, 52c, 52d encompass center portion 52e of valve strip 52. The shaded areas depicted on valve strip 52 are illustrative of the bonded areas (only the areas bonded to top sheet 40 are shown) . As shown in FIG. 4, valve strip 52 extends the entire width of top and bottom sheets 40,42 between edge pairs 40a, 42a and 40b, 42b. In one case, valve strip 52 is a polyethylene strip, approximately 0.002 inches (2 mil) thick. Polyethylene sheets in contact with each other have good mutual surface attraction. Thus a good seal is provided between strip 52 and the inner polyethylene layer of top sheet 40. Other materials that provide a good mutual surface attraction may be used for valve strip 52 and the inner side of top sheet 40.
  • Valve strip 52 is bonded to bottom sheet 42 along the entire length of long edge 52a, as illustrated by bonding line 42e on bottom sheet 42 that is adjacent storage portion 48. Valve strip 52 is also bonded to bottom sheet 42 along short edges 52c, 52d. In one case, valve strip 52 is bonded to bottom sheet 42 along a portion of long edge 52b, as illustrated in FIG. 4 by the shaded area extending partially along bottom edge 42d of sheet 42. In another case, valve strip 52 is bonded to bottom sheet 42 along the entire length of long edge 52b, as illustrated in FIG. 4 by the alternate position line extending along bottom edge 42d. The bonding between bottom sheet 42 and valve strip 52 is such that center portion 52e of valve strip 52 is not bonded to bottom sheet 42.
  • Valve strip 52 is also bonded to top sheet 40 along a portion of long edge 52a, as illustrated by bonding line 40e on top sheet 40. Valve strip 52 is also bonded to top sheet 40 along short edges 52c and 52d, and along a portion of long edge 52b.
  • the bonding between top sheet 40 and valve strip 52 defines passageway 54 that extends from opening 56 into storage portion 48 to opening 58 that leads to the environment outside of bag 50.
  • the effectiveness of the one-way seal along passageway 54 between valve strip 52 and top sheet 40 improves as the length of passageway 54 is increased and the width of passageway 54 is decreased. However, the width is made such that air being evacuated from storage portion 48 passes through passageway 54 without undue delay as the user rolls bag 50.
  • opening 56 is approximately 1 3/8 inches wide and opening 58 is approximately 1 5/8 inches wide.
  • the width of passageway 54 is approximately 1 1/8 inches and the length of passageway 54 from opening 56 to opening 58 is approximately 14 1/4 inches.
  • the width of sheets 40,42 is approximately 18 inches.
  • FIG. 5 is an exploded perspective view of another valve embodiment.
  • valve 62 is similar to valve 46 shown in FIG. 4, although only one short edge of valve strip 52 is bonded to top sheet 40.
  • opening 64 that leads to the environment outside of the storage bag is differently oriented than opening 58 in FIG. 4.
  • Valve strip 52 is bonded to bottom sheet 42 along the entire length of long edge 52a and along the entire length of long edge 52b (in another case, only a portion of long edge 52b is bonded to bottom sheet 42) .
  • only one short side 52c is bonded to bottom sheet 42.
  • both short sides 52c, 52d are bonded to bottom sheet 42, as illustrated by the alternate position line extending along side 42b of bottom sheet 42.
  • Valve strip 52 is bonded to top sheet 40 along a portion of long edge 52a, the entire length of long edge 52b, and along short edge 52c so that passageway 54 extends from opening 56 into storage portion 48 to opening 64 that leads to the environment outside the bag at short edge 52d.
  • bag 50 is manufactured by first bonding a portion of valve strip 52 to bottom sheet 42, and then bonding the strip 52 and sheet 42 combination to top sheet 40.
  • a portion of long edge 52a, slightly wider than the width of opening 56, of valve strip 50 is first bonded to bottom sheet 42 as shown by area 60 in FIG. 4. Since valve strip 52 is thin, the bond is formed in one case using a seal head heated to approximately 270 degrees Fahrenheit.
  • bag 50 is manufactured by forming all bonds at once.
  • a heat resistive material e.g., TEFLON (not shown) is placed between top sheet 40 and valve strip 52 where opening 56 is to be formed. Then, top sheet 40, valve strip 52, and bottom sheet 42 are heat bonded together, and the heat resistive material is removed from opening 56.
  • valve strip 52 and bottom sheet 42 that extends from storage portion 48 to outside the bag is blocked by bonding valve strip 52 to sheet 42 below opening 56 into storage- portion 48 rather than below opening 58 . (FIG. 4) or 64 (FIG. 5) . It has been determined that if a passageway between valve strip 52 and bottom sheet 42 is sealed closest to the exit opening (e.g., near short edge 52d) , that air being forced from storage portion 48 during evacuation tends to inflate the passageway between bottom sheet 42 and valve strip 52, thereby making it difficult to force air through passageway 54 between valve strip 52 and top sheet 40.
  • Persons skilled in the art will understand that many variations of the present invention are possible. The present invention is therefore limited only by the scope of the following claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Toys (AREA)
PCT/US2002/016909 2001-06-25 2002-05-29 Storage bag with one-way air valve Ceased WO2003000564A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020037016849A KR100918072B1 (ko) 2001-06-25 2002-05-29 단방향 공기 밸브를 갖는 저장 백, 및 저장 백 제조 방법
DE60213408T DE60213408T2 (de) 2001-06-25 2002-05-29 Aufbewahrungsbeutel mit einwegluftventil
JP2003506779A JP4015617B2 (ja) 2001-06-25 2002-05-29 一方向空気バルブを有する収納用バッグ
EP02731966A EP1399367B1 (en) 2001-06-25 2002-05-29 Storage bag with one-way air valve
AU2002303901A AU2002303901B2 (en) 2001-06-25 2002-05-29 Storage bag with one-way air valve
CA002452193A CA2452193C (en) 2001-06-25 2002-05-29 Storage bag with one-way air valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/891,812 2001-06-25
US09/891,812 US6357915B2 (en) 1999-08-13 2001-06-25 Storage bag with one-way air valve

Publications (1)

Publication Number Publication Date
WO2003000564A1 true WO2003000564A1 (en) 2003-01-03

Family

ID=25398859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/016909 Ceased WO2003000564A1 (en) 2001-06-25 2002-05-29 Storage bag with one-way air valve

Country Status (9)

Country Link
US (1) US6357915B2 (cg-RX-API-DMAC7.html)
EP (1) EP1399367B1 (cg-RX-API-DMAC7.html)
JP (1) JP4015617B2 (cg-RX-API-DMAC7.html)
KR (1) KR100918072B1 (cg-RX-API-DMAC7.html)
CN (1) CN1294054C (cg-RX-API-DMAC7.html)
AU (1) AU2002303901B2 (cg-RX-API-DMAC7.html)
CA (1) CA2452193C (cg-RX-API-DMAC7.html)
DE (1) DE60213408T2 (cg-RX-API-DMAC7.html)
WO (1) WO2003000564A1 (cg-RX-API-DMAC7.html)

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DE102005024584A1 (de) * 2005-05-25 2006-11-30 Lang, Robert Evakuierbares Behältnis und Verfahren zu seiner Evakuierung
WO2009148636A1 (en) * 2008-06-03 2009-12-10 Apricity Llc Warming blankets, covers, and apparatus, and methods of fabricating and using the same
US8066433B2 (en) 2008-03-14 2011-11-29 Pro-Mart Industries, Inc. Valve for vacuum storage bag
USD845761S1 (en) 2018-01-17 2019-04-16 Hms Mfg. Co. Closure clip

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EP1399367B1 (en) 2006-07-26
CA2452193A1 (en) 2003-01-03
US6357915B2 (en) 2002-03-19
CA2452193C (en) 2006-11-28
CN1294054C (zh) 2007-01-10
DE60213408T2 (de) 2006-11-23
JP2004531435A (ja) 2004-10-14
EP1399367A1 (en) 2004-03-24
CN1547543A (zh) 2004-11-17
KR100918072B1 (ko) 2009-09-22
KR20040034618A (ko) 2004-04-28
US20020009240A1 (en) 2002-01-24
DE60213408D1 (de) 2006-09-07
JP4015617B2 (ja) 2007-11-28

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