US20040035719A1 - Method for forming reclosable access portals in film packaging - Google Patents

Method for forming reclosable access portals in film packaging Download PDF

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Publication number
US20040035719A1
US20040035719A1 US10/461,302 US46130203A US2004035719A1 US 20040035719 A1 US20040035719 A1 US 20040035719A1 US 46130203 A US46130203 A US 46130203A US 2004035719 A1 US2004035719 A1 US 2004035719A1
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US
United States
Prior art keywords
film
failure
film substrate
forming
elements
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
US10/461,302
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English (en)
Inventor
Ton Ebbers
Peter van Raaij
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.)
Avintiv Specialty Materials Inc
Original Assignee
Polymer Group 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 Polymer Group Inc filed Critical Polymer Group Inc
Priority to US10/461,302 priority Critical patent/US20040035719A1/en
Assigned to POLYMER GROUP, INC. reassignment POLYMER GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VAN RAAIJ, PETER J.J, EBBERS, TON A.J.L.
Publication of US20040035719A1 publication Critical patent/US20040035719A1/en
Assigned to CITICORP NORTH AMERICA, INC. AS FIRST LIEN COLLATERAL AGENT reassignment CITICORP NORTH AMERICA, INC. AS FIRST LIEN COLLATERAL AGENT SECURITY AGREEMENT Assignors: CHICOPEE, INC., FIBERTECH GROUP, INC, POLY-BOND, INC., POLYMER GROUP, INC.
Assigned to WILMINGTON TRUST COMPANY, AS SECOND LIEN COLLATERAL AGENT reassignment WILMINGTON TRUST COMPANY, AS SECOND LIEN COLLATERAL AGENT SECURITY AGREEMENT Assignors: CHICOPEE, INC., FIBERTECH GROUP, INC., POLY-BOND, INC., POLYMER GROUP, INC.
Assigned to LORETEX CORPORATION, FABRENE GROUP L.L.C., PNA CORPORATION, FNA ACQUISITION, INC., FIBERGOL CORPORATION, FABRENE CORP., PRISTINE BRANDS CORPORATION, POLYLONIX SEPARATION TECHNOLOGIES, INC., POLYMER GROUP, INC., POLY-BOND INC., TECHNETICS GROUP, INC., PGI EUROPE, INC., FABPRO ORIENTED POLYMERS, INC., PGI POLYMER, INC., CHICOPEE, INC., DOMINION TEXTILE (USA) INC., FIBERTECH GROUP, INC., BONLAM (S.C.), INC., FNA POLYMER CORP. reassignment LORETEX CORPORATION RELEASE OF SECURITY INTEREST IN PATENTS Assignors: CITICORP NORTH AMERICA, INC., AS FIRST LIEN COLLATERAL AGENT
Assigned to FIBERTECH GROUP, INC., TECHNETICS GROUP, INC., PRISTINE BRANDS CORPORATION, BONLAM (S.C.), INC., PNA CORPORATION, FNA POLYMER CORP., POLY-BOND INC., FABRENE CORP., FIBERGOL CORPORATION, PGI POLYMER, INC., FNA ACQUISITION, INC., PGI EUROPE, INC., POLYLONIX SEPARATION TECHNOLOGIES, INC., FABPRO ORIENTED POLYMERS, INC., CHICOPEE, INC., FABRENE GROUP L.L.C., DOMINION TEXTILE (USA) INC., LORETEX CORPORATION, POLYMER GROUP, INC. reassignment FIBERTECH GROUP, INC. RELEASE OF SECURITY INTEREST IN PATENTS Assignors: WILMINGTON TRUST COMPANY, AS SECOND LIEN COLLATERAL AGENT
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
    • 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
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements

Definitions

  • the present invention is directed to means for forming frangible, reclosable access portals in various types of film packaging, and specifically, to means for forming reclosable access portals that exhibit improved uniformity in the presentation of the access port beneficial for forming an effective reclosable seal, while substantially reducing the potential of deleterious tearing of the film package.
  • film packaging is well known in the art as a means for sealing a product within a controlled environment and to prevent detrimental contamination.
  • Products that have benefitted from such packaging include food products, tobacco, photographic film, medical aids, personal hygiene materials and home care agents.
  • those products that are pre-moistened require an effective combination of durable film packaging with a strong, hermetic seal.
  • the seal is not only a protective measure, but also, the unbroken seal indicates to the consumer that the package has not been improperly handled.
  • Typical retail availability of products ensconced in durable film packaging includes having packages that contain more than one such product, or plural elements, such as sheets, of the same product.
  • a seal can be reformed in the packaging after the initial element is removed, and that such seal be sufficiently effective to maintain the quality of the remaining elements until the last element is removed and the now empty packaging discarded.
  • a retail film package must be able to resist mechanical failure and contamination during shipping and handling, and yet be accessible to the common user.
  • Forming frangible access portals in film packaging that are receptive to reclosable actions are complex due to the necessary combination of a durable film package and a strong, hermetic seal.
  • Various prior art attempts have been made to form suitable closure means that do not compromise the ability of the film package to perform, including the use of molded thermoplastic closures and replaceable adhesive tabs. Molded thermoplastic closures allow for positive sealing action, but require additional forming steps. Further such thermoplastic closures require affixing to the film packaging, wherein such joining is in itself durable and leak-proof, and can form alternate paths of contamination including introduction of adhesives into the sealed environment within the film package.
  • Replaceable adhesive tabs require the formation of an access way into the interior of the sealed film package.
  • Typical practices for forming such access ways include perforating or otherwise pre-cutting and preferentially weakening regions in the film face.
  • the frangible pre-cut region is then forced open by the consumer by tearing of the film face, a process which has been found to be a very difficult to perform not only completely, but also in such a way as to prevent over-extension or miss-direction of the tearing force that results in a subsequent failure of the reclosable mechanism.
  • over-extension failures are particularly evident when oriented films are used as one or more layers in the film substrate, with tearing tending to propagate in the direction of film orientation.
  • the present invention is directed to means for forming frangible, reclosable access portals in various types of film packaging, and specifically, to means for forming reclosable access portals that exhibit improved uniformity in the presentation of the access port beneficial for forming an effective reclosable seal, while substantially reducing the potential of deleterious tearing of the film packaging.
  • the access port is formed from a region of the film packaging, which has been subjected to mechanical weakening of the film substrate, wherein the weakened regions include frangible, failure elements and force directing elements. Failure elements of the weakened region induce the film substrate to preferentially fail (i.e. tear) continuously in the general direction and bounds of the element.
  • Representative failure elements include complete depth perforations, partial depth perforations, scoring, and embossed or otherwise thinned film substrate areas.
  • Force directing elements are discontinuities in the failure element that redirect the force vector in a direction of at least 10 degrees from the continuous path, generally defined by the failure elements.
  • the film packaging may comprise any suitable homogenous or heterogeneous substrate, optionally of either laminate or composite construction, which is compatible with the intended product to be so contained.
  • the film substrate may include barrier performance agents such as fatty acids, as well as topically applied aesthetic modifiers such as colorants and printed inks.
  • any profile of access portals can be practiced in accordance with the present invention, including, but not limited to; slits, ellipses, rectangles, and the combinations thereof, in which there is a combination of failure elements and force directors are combined in a discontinuous failure zone.
  • film packaging can be produced which forms uniform and reproducible access portals. It is within the purview of the invention that food materials, as well as hygienic, medical and home care products, can be packaged in suitable film substrates, wherein the clearly formed access portal allows for effective reclosable access.
  • FIG. 1 is a photograph of a typical retail product as packed in a film package with a conventional unopened access port;
  • FIG. 2 is a photograph of an oval knife as is conventionally practiced in the formation of prior art access portals in retail film packaging;
  • FIG. 3 is a photograph of a retail film package wherein the access port has been formed utilizing the oval knife of FIG. 2;
  • FIG. 4 is a photograph of a modified knife having failure elements and force directing elements in accordance with the present invention.
  • FIG. 5 is a photograph of a retail film package wherein the access port has been formed by way of the interaction of the failure elements and force directing elements.
  • the present invention is directed to a means for forming frangible access portals in weakened regions of film packaging, which entails the combination of failure elements and force directing elements.
  • Failure elements of the weakened region induce the film substrate to preferentially fail (i.e. tear) continuously in the general direction and bounds of the element.
  • Representative failure elements include complete depth perforations, partial depth perforations, suitable scoring, and embossed or otherwise thinned film substrate areas.
  • Force directing elements are discontinuities in the failure element that redirect the force vector in a direction of at least 10 degrees from the continuous path.
  • the failure elements enable the film to be torn by inducing a localized weakness in the film substrate.
  • a tear is initiated in the film substrate, a tear which then propagates in the general direction and orientation of the failure element through continued application of force.
  • force directing elements are introduced. Force directing elements terminate the propagation of the failure in the film substrate and allow for the force vector to be redirected from the continuous path. Such restraint of the tear prevents over-extension of the access portal beyond a predefined area in the face of the film packaging.
  • the force vector can be reoriented so as to initiate a new failure in the film substrate that is in a direction at least 10 degrees off of the path of the previous failure element.
  • Such re-direction failure in the film substrate for forming an access opening therein can e particularly desirable in the case of oriented film substrates, where it can be desirable to form an opening which extends at least partially traversely to the direction of film orientation.
  • Suitable means for introducing failure elements and force directing elements into film substrates for packaging include the application of mechanical disruption of the film substrate, such as by application of metal knives, laser ablation, roll embossing, and hydraulic energy.
  • the most preferred mechanism for inducing a frangible weakened region is through the use of metal knives that are forced against the film substrate.
  • metal knives such as when presented as a cutting surface asperity in a section of tool steel, on a film substrate, the pressure and temperature of the process can be modulated simultaneously to obtain optimum cutting performance.
  • FIG. 1 depicts a representative product, which has been ensconced within film packaging. This particular product does not include any access portals as a way to obtain material from within the confines of the packaging.
  • FIG. 2 is a sample of a cutting knife as has been practiced in the prior art, represented by U.S. Pat. No. 5,379,897, incorporated herein by reference. The knife-edge is presented as an elliptical surface asperity projecting out of the face of the tool steel base, which in turn, defines a failure element that extends continuously about the weakened region.
  • the prior art cutting knife is used to form a weakened region in the surface of the representative product, and force is subsequently applied to the region so as to form an access way, tears propagate beyond the boundaries defined by the cutting knife, as shown in FIG. 3.
  • FIG. 4 provides a representative cutting knife embodying the teachings of the present invention.
  • the elliptical failure element includes two force directing elements, 2 and 3 .
  • the force directing elements are at least 10 degrees off of the incident angle defined by the failure element; in the illustrated embodiment, the force direct elements are oriented at approximately 90 degrees to the direction of tearing defined by the otherwise elliptical failure element.
  • the cutting knife of FIG. 4 is used to form a weakened region in the surface of the representative product, and force is applied, the tears propagate in the region specifically defined by the conjoined failure elements and force directing elements, and do not extend beyond the boundaries.
  • Element 1 illustrated in FIG. 4 facilitates complete formation of the access opening, and forms a connector joining the separated portion to the remainder of the substrate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
US10/461,302 2002-06-13 2003-06-13 Method for forming reclosable access portals in film packaging Abandoned US20040035719A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/461,302 US20040035719A1 (en) 2002-06-13 2003-06-13 Method for forming reclosable access portals in film packaging

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38857602P 2002-06-13 2002-06-13
US10/461,302 US20040035719A1 (en) 2002-06-13 2003-06-13 Method for forming reclosable access portals in film packaging

Publications (1)

Publication Number Publication Date
US20040035719A1 true US20040035719A1 (en) 2004-02-26

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US10/461,302 Abandoned US20040035719A1 (en) 2002-06-13 2003-06-13 Method for forming reclosable access portals in film packaging

Country Status (3)

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US (1) US20040035719A1 (fr)
AU (1) AU2003243584A1 (fr)
WO (1) WO2003105560A2 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080037913A1 (en) * 2006-08-08 2008-02-14 Martuch Thomas J Flexible container for pourable product
US20080240627A1 (en) * 2007-03-30 2008-10-02 Cole Carole A Package integrity indicating closure
US20110127319A1 (en) * 2009-12-01 2011-06-02 Kraft Foods Global Brands Llc Resealable flexible film packaging products and methods of manufacture
US20110204056A1 (en) * 2010-02-23 2011-08-25 Kraft Foods R&D, Inc. Food Package Having Opening Feature
US8308363B2 (en) 2006-05-23 2012-11-13 Kraft Foods Global Brands Llc Package integrity indicator for container closure
US8746483B2 (en) 2006-05-23 2014-06-10 Intercontinental Great Brands Llc Tamper evident resealable closure
US8889205B2 (en) 2006-12-27 2014-11-18 Intercontinental Great Brands Llc Resealable closure with package integrity feature
US9150342B2 (en) 2003-04-16 2015-10-06 Intercontinental Great Brands Llc Resealable tray container
US9205967B2 (en) 2010-01-26 2015-12-08 Generale Biscuit Resealable packaging for food products and method of manufacturing
US9221590B2 (en) 2010-03-23 2015-12-29 Generale Biscuit Resealable packaging for food products and method of manufacturing
US9630761B2 (en) 2008-10-20 2017-04-25 Mondelez UK Holding & Services Limited Packaging
US9656783B2 (en) 2010-05-18 2017-05-23 Intercontinental Great Brands Llc Reclosable flexible packaging and methods for manufacturing same
US9688442B2 (en) 2011-03-17 2017-06-27 Intercontinental Great Brands Llc Reclosable flexible film packaging products and methods of manufacture
US9708104B2 (en) 2010-05-18 2017-07-18 Intercontinental Great Brands Llc Reclosable flexible packaging and methods for manufacturing same
US10118741B2 (en) 2008-07-24 2018-11-06 Deborah Lyzenga Package integrity indicating closure
US10273068B2 (en) 2014-12-23 2019-04-30 Sonoco Development, Inc. Die cut opening for multi-layer flexible package

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811848A (en) * 1981-08-21 1989-03-14 Folienwalzwerk Brueder Teich Aktiengesellschaft Package with a gas-tight package envelope
US5379897A (en) * 1992-07-20 1995-01-10 The Procter & Gamble Company Disposable, compactable, shape-restorable packages for storing and dispensing dry or premoistened sheets
US5437881A (en) * 1989-07-01 1995-08-01 Nestec S.A. Package for food products
US5511664A (en) * 1993-06-21 1996-04-30 Fuji Photo Film Co., Ltd. Wrapped article
US5908246A (en) * 1996-09-07 1999-06-01 Komatsu Electronic Metals Co., Ltd. Unsealing structure with cut out for shrink film sealed packages

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1153034B (it) * 1982-11-15 1987-01-14 Grace W R & Co Procedimento ed apparecchiatura per il confezionamento sottovuoto e reativa confezione
US5201164A (en) * 1991-05-17 1993-04-13 Kimberly-Clark Corporation Method for improving the dispensing of stacked wet wipes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811848A (en) * 1981-08-21 1989-03-14 Folienwalzwerk Brueder Teich Aktiengesellschaft Package with a gas-tight package envelope
US5437881A (en) * 1989-07-01 1995-08-01 Nestec S.A. Package for food products
US5379897A (en) * 1992-07-20 1995-01-10 The Procter & Gamble Company Disposable, compactable, shape-restorable packages for storing and dispensing dry or premoistened sheets
US5511664A (en) * 1993-06-21 1996-04-30 Fuji Photo Film Co., Ltd. Wrapped article
US5908246A (en) * 1996-09-07 1999-06-01 Komatsu Electronic Metals Co., Ltd. Unsealing structure with cut out for shrink film sealed packages

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9150342B2 (en) 2003-04-16 2015-10-06 Intercontinental Great Brands Llc Resealable tray container
US9663282B2 (en) 2006-05-23 2017-05-30 International Great Rapids LLC Package integrity indicator for container closure
US8951591B2 (en) 2006-05-23 2015-02-10 Intercontinental Great Brands Llc Package integrity indicator for container closure
US8308363B2 (en) 2006-05-23 2012-11-13 Kraft Foods Global Brands Llc Package integrity indicator for container closure
US8722122B2 (en) 2006-05-23 2014-05-13 Intercontinental Great Brands Llc Package integrity indicator for container closure
US8746483B2 (en) 2006-05-23 2014-06-10 Intercontinental Great Brands Llc Tamper evident resealable closure
US20080037912A1 (en) * 2006-08-08 2008-02-14 Martuch Thomas J Flexible container for pourable product
US7967510B2 (en) 2006-08-08 2011-06-28 Kellogg Company Flexible container for pourable product
US20080037913A1 (en) * 2006-08-08 2008-02-14 Martuch Thomas J Flexible container for pourable product
US8408793B2 (en) 2006-08-08 2013-04-02 Kellogg Company Flexible container for pourable product
US8889205B2 (en) 2006-12-27 2014-11-18 Intercontinental Great Brands Llc Resealable closure with package integrity feature
US8408792B2 (en) 2007-03-30 2013-04-02 Kraft Foods Global Brands Llc Package integrity indicating closure
US20080240627A1 (en) * 2007-03-30 2008-10-02 Cole Carole A Package integrity indicating closure
US10829285B2 (en) 2007-03-30 2020-11-10 Intercontinental Great Brands Llc Package integrity indicating closure
US9919855B2 (en) 2007-03-30 2018-03-20 Intercontinental Great Brands Llc Package integrity indicating closure
US9187228B2 (en) 2007-03-30 2015-11-17 Intercontinental Great Brands Llc Package integrity indicating closure
US10118741B2 (en) 2008-07-24 2018-11-06 Deborah Lyzenga Package integrity indicating closure
US11027892B2 (en) * 2008-07-24 2021-06-08 Deborah Lyzenga Package integrity indicating closure
US20190031402A1 (en) * 2008-07-24 2019-01-31 Deborah Lyzenga Package Integrity Indicating Closure
US9630761B2 (en) 2008-10-20 2017-04-25 Mondelez UK Holding & Services Limited Packaging
US20110127319A1 (en) * 2009-12-01 2011-06-02 Kraft Foods Global Brands Llc Resealable flexible film packaging products and methods of manufacture
US9205967B2 (en) 2010-01-26 2015-12-08 Generale Biscuit Resealable packaging for food products and method of manufacturing
US8814430B2 (en) 2010-02-23 2014-08-26 Kraft Foods R&D, Inc. Food package having opening feature
US20110204056A1 (en) * 2010-02-23 2011-08-25 Kraft Foods R&D, Inc. Food Package Having Opening Feature
US9221590B2 (en) 2010-03-23 2015-12-29 Generale Biscuit Resealable packaging for food products and method of manufacturing
US9708104B2 (en) 2010-05-18 2017-07-18 Intercontinental Great Brands Llc Reclosable flexible packaging and methods for manufacturing same
US9656783B2 (en) 2010-05-18 2017-05-23 Intercontinental Great Brands Llc Reclosable flexible packaging and methods for manufacturing same
US9688442B2 (en) 2011-03-17 2017-06-27 Intercontinental Great Brands Llc Reclosable flexible film packaging products and methods of manufacture
US10273068B2 (en) 2014-12-23 2019-04-30 Sonoco Development, Inc. Die cut opening for multi-layer flexible package
US10807779B2 (en) 2014-12-23 2020-10-20 Sonoco Development, Inc. Die cut opening for multi-layer flexible package

Also Published As

Publication number Publication date
WO2003105560A2 (fr) 2003-12-24
WO2003105560A3 (fr) 2004-05-13
AU2003243584A1 (en) 2003-12-31
AU2003243584A8 (en) 2003-12-31

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