US20030215165A1 - Easy-open strip and bags incorporating the same - Google Patents

Easy-open strip and bags incorporating the same Download PDF

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Publication number
US20030215165A1
US20030215165A1 US10/151,388 US15138802A US2003215165A1 US 20030215165 A1 US20030215165 A1 US 20030215165A1 US 15138802 A US15138802 A US 15138802A US 2003215165 A1 US2003215165 A1 US 2003215165A1
Authority
US
United States
Prior art keywords
easy
tear lines
frangible layer
bag
base web
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.)
Abandoned
Application number
US10/151,388
Other languages
English (en)
Inventor
Robert Hogan
Eric Plourde
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works 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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to US10/151,388 priority Critical patent/US20030215165A1/en
Assigned to ILLINOIS TOOL WORKS INC. reassignment ILLINOIS TOOL WORKS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PLOURDE, ERIC P., HOGAN, ROBERT E.
Priority to EP03252843A priority patent/EP1364884A1/de
Publication of US20030215165A1 publication Critical patent/US20030215165A1/en
Priority to US10/913,719 priority patent/US7395642B2/en
Abandoned legal-status Critical Current

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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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure elements
    • 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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/34—End- or aperture-closing arrangements or devices with special means for indicating unauthorised opening
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5894—Preformed openings provided in a wall portion and covered by a separate removable flexible element
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements

Definitions

  • the present invention relates to a easily-openable closure arrangement for bags, and more particularly to perforated strips useful as closure arrangements for bags.
  • Bulk consumer items e.g., potting soil, seed, and animal feed as well as food products for service applications
  • bags e.g., pouches or satchels
  • the weight of these bulk items often necessitates that the material for the bag be durable and tear-resistant.
  • bulk item bags are made of a tear-resistant plastic, a tear-resistant paper-based material, or some combination of the two.
  • the opening of bulk item bags is often difficult without the use of cutting instruments due to the tear resistance of the bag material.
  • the present invention provides an easy-open closure arrangement for a bag which includes a base web, a frangible layer, and a tear bead.
  • the base web has a pair of longitudinal edges with a pair of perforated tear lines running generally parallel to the longitudinal edges and substantially equidistant from the longitudinal edges.
  • the frangible layer is attached to one side of the base web and is positioned over the perforated tear lines to obstruct the perforations on one side.
  • the tear bead is attached to the frangible layer on the side opposite from the base web and is positioned generally centrally between the location of the perforated tear lines.
  • the base web is formed from a material such as a thermoplastic polymer, a paper-based material, other multilayer webs used in the packaging industry or a combination thereof.
  • the frangible layer thus serves to seal the perforated lines keeping out small particles and insects and preventing small particles within the packages from leaking out.
  • the frangible layer also aids in keeping moisture in or out.
  • the present invention also provides an easy-open bag incorporating the above-described closure arrangement.
  • the bag includes opposing side walls that form the bottom and sides of the bag.
  • the above-described closure arrangement may be attached to the opposing side walls to form the top of the bag or the closure may be provided over a slit in one of the walls.
  • the closure can be attached to the inside or outside of the bag wall.
  • closure arrangements and bags of the present invention provide a unique solution for providing access to the contents of bulk item bags without resorting to cutting instruments.
  • FIG. 1 is a perspective view, with portions broken away, of an easy-open closure arrangement in accordance with the present invention in an unfolded state constructed;
  • FIG. 2 is a perspective view of the easy-open closure arrangement of FIG. 1 in a folded and partially-opened state
  • FIG. 3 is a cross-sectional view of a bulk item bag incorporating the easy-open closure arrangement of FIG. 1 in a folded state;
  • FIG. 4 is a plan view of a bulk item bag with the easy-open closure arrangement of FIG. 1 attached to one of the opposing side walls;
  • FIG. 5 is a cross-sectional view, taken as indicated by line 5 - 5 , of the bag shown in FIG. 4;
  • FIG. 6 is a plan view of a bulk item bag incorporating an alternative embodiment of the easy-open closure arrangement of the present invention.
  • FIG. 7 is a cross-sectional view, taken as indicted by line 7 - 7 , of the bag shown in FIG. 6.
  • FIG. 1 is a perspective view of one embodiment of the easy-open closure arrangement of the present invention.
  • the closure arrangement 10 includes a base web 12 , which is formed from a length of a thermoplastic polymer such as polyethylene, a length of paper-based material or a combination of the two materials (e.g., a laminate).
  • a base web 12 is formed from a length of a thermoplastic polymer such as polyethylene, a length of paper-based material or a combination of the two materials (e.g., a laminate).
  • the thermoplastic polymer and paper-based material are not readily frangible.
  • Base web 12 has a pair of longitudinal edges and a pair of perforated tear lines 14 , 16 running generally parallel to the longitudinal edges. Perforated tear lines 14 , 16 are located substantially equidistant from the longitudinal edges and the perforations are spaced sufficiently close so that the tear lines will rupture upon the application of a tearing force to the tear lines.
  • frangible layer 18 Attached to one side of base web 12 is a layer of a frangible thermoplastic film 18 (hereinafter “frangible layer 18 ”).
  • frangible layer 18 is positioned on one side of the base web 12 so as to obstruct (or seal) the perforations of perforated tear lines 14 , 16 .
  • frangible means that the material is easily broken or ruptured.
  • An example of a thermoplastic polymer to be used for frangible layer 18 is ethylene vinyl acetate (EVA).
  • EVA ethylene vinyl acetate
  • Frangible layer 18 is attached to the base web 12 by any of many techniques known in the art such as heat sealing, adhesive bonding, etc.
  • frangible layer 18 can be adhered via heating sealing or via the use of a tie layer.
  • frangible layer 18 can be adhered thereto with an adhesive.
  • tear bead 22 is made of a generally tear resistant material (i.e., non-frangible) such as a cloth string, or plastic extrusion.
  • the tear resistance of the tear bead 22 is greater than that of either the base web material 12 or the wall material of a bag incorporating the easy-open closure arrangements of the invention.
  • tear bead 22 is formed from a tear resistant thermoplastic polymer such as polypropylene or high-density polyethylene (HDPE) and may be attached by heat sealing, adhesive bonding or any other appropriate technique known in the art.
  • the tear bead 22 is centrally located on frangible layer 18 between the position of perforated tear lines 14 , 16 to substantially equalize the tearing force applied to tear lines 14 , 16 as tear bead 22 is pulled away from the bag.
  • FIG. 2 is a perspective view of the easy-open closure arrangement 10 in a folded and partially open (i.e., torn) state.
  • Closure arrangement 10 is folded at a location between and along the same direction as perforated tear lines 14 , 16 so as to position frangible layer 18 and tear bead 22 within the interior of folded, closure arrangement 10 so that tear lines 14 , 16 are obstructed on the interior side of closure arrangement 10 .
  • the top of closure arrangement 10 is removed by tearing along perforated tear lines 14 , 16 ( 16 not shown) by pulling along tear bead 22 .
  • FIG. 3 is a cross-sectional view of bulk item bag 20 incorporating the folded easy-open closure arrangement 10 in accordance with invention.
  • opposing side walls 32 , 34 are attached to closure arrangement 10 via base web 12 .
  • Opposing side walls 32 , 34 are formed from a single length of bag forming material as shown in FIG. 3 or may be formed from two lengths of bag-forming material sealed at the end opposite from tear bead 22 .
  • Opposing side walls 32 , 34 are attached to base web 12 by any of many well known techniques, such as heat sealing, adhesives, etc., dependent on the type of materials used for base web 12 and opposing side walls 32 , 34 .
  • FIG. 3 is a cross-sectional view of bulk item bag 20 incorporating the folded easy-open closure arrangement 10 in accordance with invention.
  • opposing side walls 32 , 34 are attached to closure arrangement 10 via base web 12 .
  • Opposing side walls 32 , 34 are formed from a single length of bag forming material as shown in FIG. 3 or may
  • opposing side walls 32 , 34 are attached to base web 12 on the exterior side of closure arrangement 10 (i.e., the side of base web 12 opposite from frangible layer 18 and tear bead 22 ).
  • closure arrangement 10 is folded in a position between and in the same direction as perforated tear lines 14 , 16 so that frangible layer 18 and tear bead 22 face bag interior 36 .
  • the point of attachment of opposing side wall 32 , 34 to base web 12 is below perforated tear lines 14 , 16 to avoid obstructing or covering the perforations of the tear lines.
  • FIG. 4 is a plan view of a sealed bulk item bag 30 incorporating easy-open closure arrangement 10 in an unfolded state.
  • the bulk item bag 30 has opposing side walls 32 , 34 , a bottom 26 and a top 28 .
  • Side wall 32 is provided with a clearance opening 38 that provides access to bag interior.
  • Closure arrangement 10 is positioned over clearance opening 38 so that the opening is completely located between perforated tear lines 14 , 16 with frangible layer 18 and tear bead 22 facing the bag interior 36 and opposing side wall 32 .
  • An extension of tear bead 22 at one end of the bead extends past base web 12 and frangible layer 18 to provide a tab for opening closure arrangement 10 along perforated tear lines 14 , 16 .
  • FIG. 5 is a cross-sectional view of bulk item bag 30 along line 5 - 5 shown in FIG. 4. Tear bead 22 is centrally located within clearance 38 so as to provide a substantially equal tearing force to perforated tear lines 14 , 16 as tear bead 22 is pulled away from opposing side wall 34 . FIG. 5 also shows that base web 12 and frangible layer 18 are attached to opposing side wall 32 along both sides of clearance 38 .
  • FIG. 6 is a plan view of a bulk item bag 50 incorporating easy-open closure arrangement 40 , which is an alternative embodiment of the closure arrangement of the present invention.
  • base web 12 is omitted and one of the opposing side walls of the bag completes closure arrangement 40 .
  • Bulk item bag 50 has opposing side walls 32 , 34 a bottom 26 and a top 28 .
  • Side wall 32 has pair of perforated tear lines 14 , 16 running substantially parallel to one another.
  • Frangible layer 18 is attached to the interior side of the opposing side wall 32 running in the same direction as perforated tear lines 14 , 16 .
  • Frangible layer 18 is positioned over the perforation lines so that the perforations of both tear lines 14 , 16 are sealed.
  • Tear bead 22 is attached to frangible layer 18 on the interior side of wall 32 centrally located between the lines of perforation. An extension of tear bead 22 extends beyond frangible layer 18 and opposing side wall 32 to provide a tab for opening closure arrangement 40 . Bag 50 is opened by pulling tear bead 22 away from opposing side wall 34 thereby tearing opposing side wall 32 along perforated tear lines 14 , 16 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
US10/151,388 2002-05-20 2002-05-20 Easy-open strip and bags incorporating the same Abandoned US20030215165A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/151,388 US20030215165A1 (en) 2002-05-20 2002-05-20 Easy-open strip and bags incorporating the same
EP03252843A EP1364884A1 (de) 2002-05-20 2003-05-07 Aufreissstreifen und Beutel mit so einem Aufreissstreifen
US10/913,719 US7395642B2 (en) 2002-05-20 2004-08-05 Method of manufacturing packages incorporating easy-open strips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/151,388 US20030215165A1 (en) 2002-05-20 2002-05-20 Easy-open strip and bags incorporating the same

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/913,719 Continuation-In-Part US7395642B2 (en) 2002-05-20 2004-08-05 Method of manufacturing packages incorporating easy-open strips

Publications (1)

Publication Number Publication Date
US20030215165A1 true US20030215165A1 (en) 2003-11-20

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US10/151,388 Abandoned US20030215165A1 (en) 2002-05-20 2002-05-20 Easy-open strip and bags incorporating the same
US10/913,719 Expired - Lifetime US7395642B2 (en) 2002-05-20 2004-08-05 Method of manufacturing packages incorporating easy-open strips

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US20050087282A1 (en) * 2003-10-28 2005-04-28 Streicher James G. Non-invasive tear mechanism for flexible packaging and apparatus
US20060083909A1 (en) * 2004-10-19 2006-04-20 Matthews David J Easy-open dough packages and related methods of manufacture
US20070269143A1 (en) * 2006-05-17 2007-11-22 Hickey Charles P Bag Resealing System
US20070280569A1 (en) * 2005-10-20 2007-12-06 Kluczynski Paul F Built-in tip for a bag and method of making same
US7395642B2 (en) 2002-05-20 2008-07-08 Illinois Tool Works Inc. Method of manufacturing packages incorporating easy-open strips
US20100058670A1 (en) * 2008-09-10 2010-03-11 Door and Hardware Systems, Inc. Method and system for sealing around door
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US7731115B2 (en) 2006-10-16 2010-06-08 Owens Corning Intellectual Capital, Llc Agitation system for blowing insulation machine
US7762484B2 (en) 2008-04-14 2010-07-27 Owens Corning Intellectual Capital, Llc Blowing wool machine flow control
US7819349B2 (en) 2006-10-16 2010-10-26 Owens Corning Intellectual Capital, Llc Entrance chute for blowing insulation machine
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US7845585B2 (en) 2006-10-16 2010-12-07 Owens Corning Intellectual Capital, Llc Blowing wool machine outlet plate assembly
US7882947B2 (en) 2006-10-16 2011-02-08 Owens Corning Intellectual Capital, Llc Partially cut loosefill package
US7886904B1 (en) 2009-07-30 2011-02-15 Owens Corning Intellectual Capital, Llc Loosefill package for blowing wool machine
US7913842B2 (en) 2006-10-16 2011-03-29 Owens Corning Intellectual Capital, Llc Loosefill package for blowing wool machine
US7938348B2 (en) 2004-07-27 2011-05-10 Owens Corning Intellectual Capital, Llc Loosefill blowing machine with a chute
US7971813B2 (en) 2004-07-27 2011-07-05 Owens Corning Intellectual Capital, Llc Blowing machine for loosefill insulation material
US7971814B2 (en) 2008-12-17 2011-07-05 Owens Corning Intellectual Capital, Llc Non-symmetrical airlock for blowing wool machine
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US9375591B2 (en) 2005-10-07 2016-06-28 Caylym Technologies International, Llc Aerial delivery devices, systems and methods
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US8622618B2 (en) * 2009-08-14 2014-01-07 Cryovac, Inc. Easy open and reclosable package with discrete laminate having panel section with easy-open sealant
US8646975B2 (en) * 2009-08-14 2014-02-11 Cryovac, Inc. Easy open and reclosable package with discrete tape and die-cut web
US9221591B2 (en) * 2009-08-14 2015-12-29 Cryovac, Inc. Easy open and reclosable package with discrete laminate with die-cut
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US8903116B2 (en) * 2010-06-14 2014-12-02 Turtle Beach Corporation Parametric transducers and related methods
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Cited By (48)

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Publication number Priority date Publication date Assignee Title
US7395642B2 (en) 2002-05-20 2008-07-08 Illinois Tool Works Inc. Method of manufacturing packages incorporating easy-open strips
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US20050008268A1 (en) 2005-01-13
EP1364884A1 (de) 2003-11-26

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