US20080037909A1 - Reclosable Bag - Google Patents

Reclosable Bag Download PDF

Info

Publication number
US20080037909A1
US20080037909A1 US11/660,620 US66062005A US2008037909A1 US 20080037909 A1 US20080037909 A1 US 20080037909A1 US 66062005 A US66062005 A US 66062005A US 2008037909 A1 US2008037909 A1 US 2008037909A1
Authority
US
United States
Prior art keywords
zipper
bag
slider
profiles
container according
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
US11/660,620
Other languages
English (en)
Inventor
Murray Leighton
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
Assigned to ILLINOIS TOOL WORKS INC. reassignment ILLINOIS TOOL WORKS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEIGHTON, MURRAY EDWARD BRUCE
Publication of US20080037909A1 publication Critical patent/US20080037909A1/en
Abandoned legal-status Critical Current

Links

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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2575—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor the slide fastener providing access to the bag through a bag wall, e.g. intended to be cut open by the consumer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125—Applying strips or strings, e.g. tear strips or strings
    • B31B50/8127—Applying strips or strings, e.g. tear strips or strings perpendicular to the direction of movement of the webs or the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements

Definitions

  • the present invention relates to reclosable bags, and other containers, having reclosable fasteners of the type known as “zippers”.
  • “Zippers” are a particular type of reclosable fastener which consist of first and second lengths of material, usually plastics, which are shaped to engage with each other along their lengths and can be released from engagement and repeatedly re-engaged and re-released.
  • the zipper can thus form a reclosable fastener for a container, for example a plastics bag.
  • the individual lengths of material making up the zipper are known as “profiles”. The profiles can be engaged by pressing them together and released by pulling them apart.
  • the zipper may be fitted with a slider which is moveable along the zipper to cause engagement and release the profiles upon movement of the slider in first and second opposite directions.
  • These zippers are known as “slider zippers”.
  • the present invention is concerned with bags and other containers having reclosable slider zipper fasteners.
  • a particular concern with the bags and other containers to which this invention relates is to provide a “tamper evident” feature. This is a feature which makes it evident that the container has been opened subsequently to the putting into place of the tamper-evident feature.
  • the present invention provides a reclosable container having a wall portion having therein an elongate opening in which is located a zipper closure which comprises first and second interengagable profiles and a slider mounted on the profiles and slidable therealong to engage and disengage the profiles upon sliding movement in respective opposite directions, wherein each zipper profile comprises a longitudinally-extending body portion and a longitudinally-extending lateral flange portion, the body portions overlapping each other and being shaped to interengage when pressed together by movement of the slider in one of its directions of movement and to be separated from each other by movement of the slider in the other, opposite direction, and the flange portions extend from the respective body portions in directions opposite to each other.
  • the body portions are substantially identical to each other in cross-sectional shape.
  • the flange portions are substantially coplanar with each other.
  • the reclosable container has a closure sheet which encloses the zipper closure and provides a tamper-evident feature.
  • closure sheet is attached to the flange portions of the zipper along their lengths.
  • the closure sheet is attached to at least one flange portion along a line of weakness.
  • the reclosable container is preferably a reclosable bag.
  • the elongate opening is formed in a major planar surface of the bag.
  • FIG. 1 is a front view of an upper portion of a bag having an opening in which a reclosable fastener is located;
  • FIG. 2 is a perspective view of the bag of FIG. 1 ;
  • FIG. 3 is a section on the line III-III of FIG. 1 , on an enlarged scale;
  • FIG. 4 is a section on the line IV-IV of FIG. 1 , also on an enlarged scale;
  • FIG. 5 is a section on the line V-V of FIG. 4 , on an enlarged scale
  • FIG. 6 is a section on the line VI-VI of FIG. 3 , on a reduced scale.
  • FIG. 7 is a schematic drawing showing the manufacture of the bag of FIG. 1 .
  • FIGS. 1 and 2 of the drawings show a bag formed from a suitable plastics film material, such as polyethylene, and having a rectangular front panel 10 , a rectangular rear panel 12 and two gusset-forming side panels 14 .
  • the front and rear panels 10 , 12 are joined to the side panels 14 by respective side welds 16 formed by the application of heat and pressure to the plastics film material.
  • the bag may be constructed from individual panels 10 , 12 , 14 joined by the welds 16 which are then seams or, as is preferred, folded from a single piece of film material. In the latter case, the bag may have a longitudinal back seam where the longitudinal edges of the film overlap and are heat sealed to each other.
  • the back seam is preferably located centrally of the rear panel 12 .
  • longitudinal edges of the film are joined to each other at one of the side welds 16 .
  • the pieces of the film are preferably joined to one another at the side welds 16 .
  • those side welds 16 which do not form a join between separate pieces of film material are formed by welding the folded film to itself each side of the respective fold line.
  • the top of the bag is shown open in FIGS. 1 and 2 .
  • the front panel 10 of the bag is formed with a slot 20 which is rectangular, apart from rounded end portions 21 .
  • the slot 20 extends across a major portion of the width of the bag, being close to the side welds 16 at each end.
  • a length of zipper 22 is located in the slot 20 and serves to open and close the slot.
  • the zipper 22 is shown in more detail in FIGS. 3 to 6 of the drawings. It consists of first and second profiles 24 , 26 which are substantially identical in cross-sectional shape, and a slider 28 which is mounted on the profiles 24 , 26 and is slidable longitudinally along the profiles.
  • the slider 28 consists of a body 30 having first and second cavities 32 , 34 and a central partition 36 .
  • the slider 28 further has a pivoted tab 38 which can conveniently be grasped between thumb and finger for movement of the slider 28 along the profiles 24 , 26 of the zipper 22 .
  • One zipper profile 24 consists of a flange 40 and a body portion 44 respectively.
  • the other profile 26 consists of a flange 42 and a body portion 46 .
  • the flanges 40 , 42 extend in opposite directions from the body portions 44 , 46 .
  • Each body portion 44 , 46 has two longitudinal ridges 48 and two longitudinal grooves 50 which provide male and female formations which are shaped to engage one with the other and to form a closure between the profiles.
  • the slider 28 is slidable along the zipper profiles 24 , 25 .
  • Each slider body portion 44 , 46 is received in a respective cavity 32 , 34 of the slider 28 .
  • the flanges 40 , 42 of the zipper 22 are secured by heat or pressure, or a combination of heat and pressure, to respective inner surface portions 50 , 52 of the front panel 10 of the bag adjacent the opening 20 .
  • a closure strip 60 is secured to the flanges 40 , 42 of the zipper 22 adjacent their outer edges.
  • the closure strip 60 is formed from polythene having a polyester or nylon layer laminated thereto. The strip is thus formed from a barrier laminate material.
  • the closure strip 60 is further secured to the zipper flanges 40 , 42 across their ends adjacent the rounded slot end portions 21 . Securement is such that the closure strip 60 is joined by a heat and/or pressure seal 62 to the upper zipper flange 40 and across the ends of the flanges 40 , 42 . It is secured by way of a line-of-weakness forming material 64 to the lower zipper flange 42 .
  • the line-of-weakness forming material may be formed by a longitudinally extending coated strip of a polymer which is a blend of polyethylene and polybutylene.
  • the inclusion of the polybutylene component reduces the effectiveness of the polyethylene as a seal-forming material, the greater the polybutylene component, the less the sealability. By selection of the amount of polybutylene component, a desired sealability can be obtained.
  • the zipper 22 may be applied to a web of the plastics film material from which the bag is eventually made by use of what is known as “cross-web technology”. This means that individual lengths of zipper are applied to the web to external transversely, usually perpendicularly, to the longitudinal direction of the web and spaced at longitudinal intervals.
  • Our international patent application WO-A-03/097341 describes and claims a method of and apparatus for applying the zipper to the web whilst the web is moving; our co-pending UK application 0401500.4 claims further methods and apparatus, also for applying the zipper to the moving web.
  • the slider 40 may be mounted on the zipper profiles prior to their being cut to length and applied to the web.
  • Our copending UK patent application 0406626.2 describes and claims an apparatus for and method of achieving this. Slider applicators for use in such apparatus and methods are available from Supreme Plastics limited of Supreme House, 300 Regents Park Road, London, N3 2TL, UK.
  • FIG. 7 shows schematically a method of making a web which can subsequently be used to make a bag as shown in FIG. 1 to 6 .
  • the method uses cross-web technology.
  • a supply roll 100 of suitable plastics film material 102 is first fed upwardly, around a guide roller 104 and then horizontally, before passing around a further guide roller 106 and thence to a take-up roller 108 .
  • the web passes through successive stations where the following operations are carried out.
  • a punch shown only schematically in FIG. 7 ) operates to cut the slot 20 in the material from which the bag is to be made.
  • a rotary turret 122 (shown schematically) is located at the second station and is used for applying pre-cut lengths of zipper 124 to the web by use of a heated pressure bar (not shown).
  • the zipper is fed from a supply (shown schematically at 126 ), through a slider applicator 127 and thence to the turret 122 after passing around a guide roller 129 . Sliders are applied to the zipper at a slider applicator 127 as referred to above, to which sliders are fed from a supply 128 thereof.
  • the web is advanced to a third station 130 where the closure strip 60 fed from a source 132 thereof is applied by means of a sealing bar applying heat and/or pressure and shown schematically at 130 .
  • a sealing bar applying heat and/or pressure and shown schematically at 130 .
  • a knife shown schematically at 134 severs the closure strip into predetermined lengths.
  • the web is then rolled onto a take-up roller 108 for subsequent use.
  • the process is therefore of the type generally known as a reel-to-reel process.
  • closure strip is sealed to the zipper strip before application of the zipper strip to the web.
  • closure and zipper strips are then fed to the web from a common source, and applied at a single station replacing the second and third stations 120 , 130 .
  • the sliders are again mounted on the zipper by a slider applicator.
  • the take-up reel is replaced by a bag-making machine to produce empty bags which can be filled (through their open bottoms) and sealed subsequently.
  • bags are known as “pre-made bags”.
  • the bag-making machine is omitted and replaced by a form-fill-seal machine which may be vertically or horizontally operating.
  • a form-fill-seal machine which may be vertically or horizontally operating. Examples of such machines and their use in conjunction with cross-web technology are to be found in international patent application WO-A-03/097341 and UK patent applications 0401500.4 and 0406626.3 referred to above.
  • the web is thus used as part of a “form-fill-seal” process.
  • the closure strip 60 When access to the contents of the closed and filled bag is required, the closure strip 60 is peeled away on the line 64 to gain access to the zipper 22 which can thus be opened by means of the slider 28 . It will be evident that the closure strip 60 thus contributes a tamper-evident feature.
  • the closure strip 60 is on the outside of the front wall 10 and is peeled away to provide access to the zipper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Slide Fasteners (AREA)
US11/660,620 2004-08-24 2005-08-24 Reclosable Bag Abandoned US20080037909A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0419217.5A GB0419217D0 (en) 2004-08-28 2004-08-28 Reclosable bag
GB0419217.5 2004-08-28
PCT/GB2005/003314 WO2006024829A1 (fr) 2004-08-28 2005-08-24 Sac refermable

Publications (1)

Publication Number Publication Date
US20080037909A1 true US20080037909A1 (en) 2008-02-14

Family

ID=33104772

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/660,620 Abandoned US20080037909A1 (en) 2004-08-24 2005-08-24 Reclosable Bag

Country Status (7)

Country Link
US (1) US20080037909A1 (fr)
EP (1) EP1796978A1 (fr)
JP (1) JP2008511507A (fr)
AU (1) AU2005278954B2 (fr)
CA (1) CA2577914A1 (fr)
GB (1) GB0419217D0 (fr)
WO (1) WO2006024829A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120047852A1 (en) * 2010-04-29 2012-03-01 Illinois Tools Work Inc. Wide mouth gusseted bag with edge seals
US20140069061A1 (en) * 2010-04-29 2014-03-13 Illinois Tool Works Inc. Full mouth opening flow wrapper package
US20160083148A1 (en) * 2013-10-22 2016-03-24 Mupack Ozaki Corporation Slider structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010015525U1 (de) * 2010-11-18 2011-02-10 Andocksysteme G. Untch Gmbh Verschluss mit zwei Profilleisten sowie Gleiter zum Verbinden und Trennen solcher Verschlüsse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807265A (en) * 1955-07-26 1957-09-24 Michael D Oliva Pocket for ring binders
US4602405A (en) * 1982-11-10 1986-07-29 Bond (R.S.C.) Associates, Ltd. Containers provided with sealable sliding fasteners
US5024537A (en) * 1990-01-08 1991-06-18 Zip-Pak Incorporated Tape carried pre-cut zipper
US5636415A (en) * 1995-09-01 1997-06-10 Illinois Tool Works Inc. Zipper with anti-derailing ribs
US5681115A (en) * 1996-01-02 1997-10-28 Diederich; R. David Child-resistant locking device for reclosable bag
US6652436B1 (en) * 2000-11-03 2003-11-25 Innoflex Incorporated Method of making tamper-evident package with slider zipper
US20060198561A1 (en) * 2005-03-01 2006-09-07 Illinois Tool Works Inc. Diagonal front panel zipper opening on flexible pouches
US7340870B2 (en) * 2002-02-05 2008-03-11 S2F Flexico Duplex bag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1040109A (fr) * 1951-07-25 1953-10-13 Prouvost & Cie Nouvel emballage étanche
US20020020481A1 (en) * 1995-05-11 2002-02-21 William A. Bodolay Tamper-evident container with reclosable fastener and method for making
US6609828B2 (en) * 1999-04-15 2003-08-26 Illinois Tool Works, Inc. Method of making reclosable packaging

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2807265A (en) * 1955-07-26 1957-09-24 Michael D Oliva Pocket for ring binders
US4602405A (en) * 1982-11-10 1986-07-29 Bond (R.S.C.) Associates, Ltd. Containers provided with sealable sliding fasteners
US5024537A (en) * 1990-01-08 1991-06-18 Zip-Pak Incorporated Tape carried pre-cut zipper
US5636415A (en) * 1995-09-01 1997-06-10 Illinois Tool Works Inc. Zipper with anti-derailing ribs
US5681115A (en) * 1996-01-02 1997-10-28 Diederich; R. David Child-resistant locking device for reclosable bag
US6652436B1 (en) * 2000-11-03 2003-11-25 Innoflex Incorporated Method of making tamper-evident package with slider zipper
US7340870B2 (en) * 2002-02-05 2008-03-11 S2F Flexico Duplex bag
US20060198561A1 (en) * 2005-03-01 2006-09-07 Illinois Tool Works Inc. Diagonal front panel zipper opening on flexible pouches

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120047852A1 (en) * 2010-04-29 2012-03-01 Illinois Tools Work Inc. Wide mouth gusseted bag with edge seals
US20140069061A1 (en) * 2010-04-29 2014-03-13 Illinois Tool Works Inc. Full mouth opening flow wrapper package
US8784289B2 (en) * 2010-04-29 2014-07-22 Illinois Tool Works Inc. Process of forming a wide mouth gusseted bag with edge seals
US20160083148A1 (en) * 2013-10-22 2016-03-24 Mupack Ozaki Corporation Slider structure
US9481494B2 (en) * 2013-10-22 2016-11-01 Mupack Ozaki Co., Ltd. Slider structure

Also Published As

Publication number Publication date
AU2005278954B2 (en) 2008-12-04
GB0419217D0 (en) 2004-09-29
JP2008511507A (ja) 2008-04-17
WO2006024829A1 (fr) 2006-03-09
CA2577914A1 (fr) 2006-03-09
EP1796978A1 (fr) 2007-06-20
AU2005278954A1 (en) 2006-03-09

Similar Documents

Publication Publication Date Title
US9132600B2 (en) Reclosable bag
US4787755A (en) Reclosable flexible container having fastener profiles sealed at their ends to the outside of the bag
US6212857B1 (en) Slide-zipper assembly, method of attaching slide-zipper assembly to thermoplastic film, and method of making slide-zippered packages
US6993886B2 (en) Method for sealing zipper assembly to bag making film at three or more points
CA2399188C (fr) Conditionnement refermable a dispositif d'inviolabilite
EP1457428B1 (fr) Emballages refermables, méthode pour leur fabrication, produit manufacturé et ensemble fermeture à glissière avec curseur
EP1442992A1 (fr) Emballage refermable à soufflet
US20050284106A1 (en) Method and apparatus for making reclosable packages having slider-actuated string zippers
US7364362B2 (en) Header end tack seal for reclosable package
EP1405798A2 (fr) Emballage refermable
EP0843636A1 (fr) Feuil et sac pourvus d'une fermeture a glissiere
US20050008266A1 (en) Reclosable package having internal seal made of double-sided adhesive tape
US20080037909A1 (en) Reclosable Bag
CA2226903C (fr) Fermeture a glissiere et methode pour placer la fermeture dans l'axe longitudinal
US8955293B2 (en) Reclosable bag and zipper therefor

Legal Events

Date Code Title Description
AS Assignment

Owner name: ILLINOIS TOOL WORKS INC., ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEIGHTON, MURRAY EDWARD BRUCE;REEL/FRAME:019743/0366

Effective date: 20070627

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION