EP1367000A2 - Flexible Verpackung mit Reissverschluss - Google Patents
Flexible Verpackung mit Reissverschluss Download PDFInfo
- Publication number
- EP1367000A2 EP1367000A2 EP03253141A EP03253141A EP1367000A2 EP 1367000 A2 EP1367000 A2 EP 1367000A2 EP 03253141 A EP03253141 A EP 03253141A EP 03253141 A EP03253141 A EP 03253141A EP 1367000 A2 EP1367000 A2 EP 1367000A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rear panels
- flexible package
- fastener tracks
- fastener
- sheet
- 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.)
- Withdrawn
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
Definitions
- the present invention pertains to flexible packages, such as plastic bags, and in particular to such packages having fastener closures employing sliders.
- An object of the present invention is to provide a shrouded reclosable package having improved arrangements for automatically filling.
- Yet another object of the present invention is to provide a shrouded reclosable plastic package having a slider fastener with improved snug fit with the package contents in a manner which also optimizes material usage for the package.
- a further object of the present invention is to provide a shrouded plastic bag having a slider fastener with an improved end seal of the fastener tracks.
- a reclosable flexible package comprising opposed front and rear panels that have sides joined together to form an interior and a package opening communicating with said interior.
- the reclosable flexible package has first and second interlockable fastener tracks configurable in an interlocked, closed position and an unlocked open position. It has a slider movable along fastener tracks to configure tracks in interlocked position to close opening and to configure fastener tracks in unlocked position so as to allow access through opening to package interior.
- the fastener tracks have opposed ends located adjacent, opposed sides of front and rear panels. The stops adjacent the ends of the fastener tracks interfere with and prevent travel of slider beyond fastener tracks.
- the fastener tracks are provided in a mated or closed position and are tacked in position as a unitary subassembly, on one of the front or rear panels.
- the front and rear panels are provided as unitary sheet which is folded with one part overlying upon the other to form the opposed front and rear panels.
- the product is laid on one of the front and rear panels and the remaining panel is folded to overly the product.
- the peripheral seals are then formed to hermetically seal the product and the fastener track is securely fastened to the front and rear panels.
- the fastener tracks are within the side seals.
- Flexible package 10 preferably comprises a plastic bag having front and back panels 12, 14 joined together at the left end by a side seal 20 and at the right end by a side seal 22.
- Side seals 20, 22 are preferably of conventional conduction heat-sealed construction.
- the side seals could have a generally constant width throughout or the width could be reduced at a point adjacent the ends of the fastener tracks which will be discussed herein.
- panels 12, 14 comprise folded portions of an integral film or sheet 100 illustrated in FIG. 4. With reference to FIG. 2, sheet 100 is severed from a continuous web or roll of material 102.
- flexible package 10 preferably comprises a bag having panels 12, 14 formed from plastic film or sheet material.
- the sheet material can be of a single material type, such as polyolefin materials including polyethylene and polypropylene, but preferably comprises a laminate assembly of several different material types, as is known in the art to provide a barrier to moisture as well as certain gases, such as oxygen or inert fillers of the types used with food products.
- Other types of laminate films such as those known in the art to preserve food freshness, may be employed.
- the panels 12, 14 can be constructed without regard to gas or vapor barrier properties.
- the film sheet is folded about fold line 114.
- the bottom portion of package 10 is terminated at a dead fold, in order to provide the preferred tight fit with the enclosed product.
- the panels 12, 14 may be joined together at their bottom ends by a bottom seal 160 (see FIG. 1) extending between side seals 20, 22, as is known in the art.
- the upper end of flexible package 10 features a reclosable opening including a slide fastener arrangement 110 which includes mating fastener tracks 26, 28 and a slider 30, all preferably of polyolefin material.
- the slider 30 is slidable along the fastener tracks, causing the fastener tracks to interlock or mate for closure of the flexible package and to unmate or separate to open the flexible package for access to contents in the package interior.
- stops 68 are formed by the application of ultrasonically generated heat and pressure to the ends of fastener tracks 26, 28. It has been found that the use of present day conduction heat sealing techniques does not provide the control needed to attain the intricate, close tolerance design of stop members according to principles of the present invention. Further, it has been found that the use of present day conduction heat sealing techniques immediately adjacent previously formed stop members tends to distort the stop members, oftentimes to an extent rendering the stop members unacceptable from a quality control standpoint.
- Stops 68 are configured for maximum efficiency, having the smallest front elevational surface area (i.e., the surface area visible in FIGS. 1 and 3, for example) which is adequate for containing slider 30 on the fastener tracks. Further details concerning the construction of end stops 68 may be found in U.S. Patent Application Publication No. US 2002/0154836 A1.
- the fastener tracks 26, 28 include sealing flanges 27, 29 joined to major panels of the package. Further details concerning the fastener assembly 110, including the features of the fastener tracks and sealing flanges thereof may be found in the same United States Patent Application Publication No. US 2002/0154836 A1.
- fastener assembly 110 is shown "tacked” into position with respect to sheet 100.
- the entire closure assembly is installed as a unitary component and is attached to one of the two panels of the package.
- sheet 100 is preferably formed as a mirror image about fold line 114. Accordingly, if desired, the sheet could flipped vertically with the panels 12, 14 being replaced, one for the other.
- lines of weakness 106 are provided at the top and bottom of sheet 100 and preferably are formed as material is rolled onto supply roll 102. In the completed package, the lines of weakness 106, which are used to separate a shroud portion from the remainder of the package, are located immediately below the fastener assembly 110.
- the fastener assembly 110 is located slightly above the line of weakness 106 of panel 12.
- the lines of weakness 106 in the panels 12, 14 are interposed one adjacent the other.
- a notch 120 is formed in the margins of sheet 100 adjacent each end of the lines of weakness 106.
- the lines of weakness 106 are formed by laser score operations preformed on the web stored on roll 102, shown in FIG. 2.
- flexible package 10 includes a shrouded portion 126 formed as an integral extension of panels 12, 14.
- shroud portion 126 is comprised of free end portions at the top and bottom of sheet 100.
- top seal 124 of the package which extends between side seals 20, 22.
- flanges 27, 29 of the fastener tracks are shown secured to panels 12, 14. It is preferred that, initially, the fastener assembly is tacked onto the sheet forming the panels 12, 14. At or about the time the peripheral seals are formed, seals between the fastener flanges 27, 29 and the panels 12, 14 is completed.
- the fastener assembly is pre-cut to a predetermined length to ensure that the fastener tracks do not intrude into the area of the side seals.
- the side seals can be recessed or made to have a reduced width in the area immediately adjacent the fastener tracks in order to avoid conflict between the side seals and the fastener tracks. Recessing the side seals is an option made available according to principles of the present invention, but has not been found necessary for the most preferred embodiment of the package.
- the package is ready for shipping to an end user.
- the end user grasps the flexible package 10 and tears the side seals at the notches 120, continuing tearing until the line of weakness 106 is severed allowing the shroud portion to be removed and thereby exposing the fastener assembly 110.
- the fastener tracks are separated and access to the package interior and the product contained therein is attained.
- the sealing flanges 27, 29 for the individual fastener tracks extend into the seal portions 130.
- the package 10 is formed without a peel seal between the sealing flanges of the fastener tracks, and accordingly, the sealing flanges of the fastener tracks remain unattached to one another, being attached only at their outer faces to the respective panels 12, 14.
- the fastener tracks are coupled to the panels 12, 14 using conduction heat seal tooling, although other techniques could be employed as well.
- the right-hand side seal 22 is substantially wider than the opposed side seal 20.
- the peg holes can be formed by punching before or after the side seals are fully formed, it being preferred that the side seals provide a reliable, complete sealing of the panels.
- the peg holes 140, 142 can be incorporated into the heat seal tooling used to form the side seals 22.
- product 150 is shown positioned on panel 12.
- Flexible package 10 has found immediate application in the field of sliced cheese packaging, but could be used for a variety of other applications such as the packaging of non-flowable products, such as lunchmeat or cheese in the form of molded blocks.
- the sheet 100 is folded about fold line 114 in the manner indicated by the arrow in FIG. 6 in preparation for a final sealing operation.
- the individual sealing steps can be carried out in different sequences and can be combined, depending upon the sealing tooling employed.
- sealing of the fastener sealing flanges to the seal areas 130 is completed first to allow a thermal barrier to be inserted between the sealing flanges of the fastener tracks.
- the side seals and the top seal 124 are then completed.
- an optional bottom seal 160 can be added to provide the tight fit.
- the bottom seal 160 of FIG. 1 lies within construction lines 162 of sheet 100.
- the bottom seal 160 is not needed for a hermetic seal of the product because of the dead fold resulting from folding about line 114.
- the improved tight fitting made possible by the reduced-size of the fastener flanges and other features of the present invention results in less material usage in addition to minimizing head space.
- the present invention provides an improved flexible package offering a number of manufacturing advantages.
- Flexible packages according to principles of the present invention employ pre-cut fastener assemblies of predetermined length so as to avoid conflict with side seals of the package.
- the line of weakness preferably a laser score line for separating the shroud from the remainder of the package is located below, preferably immediately below the fastener tracks.
- Packages according to principles of the present invention preferably employ flanges of minimal height.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US155401 | 1988-02-12 | ||
US10/155,401 US20030219176A1 (en) | 2002-05-23 | 2002-05-23 | Flexible package having slider closure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1367000A2 true EP1367000A2 (de) | 2003-12-03 |
EP1367000A3 EP1367000A3 (de) | 2004-01-14 |
Family
ID=29419605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03253141A Withdrawn EP1367000A3 (de) | 2002-05-23 | 2003-05-20 | Flexible Verpackung mit Reissverschluss |
Country Status (3)
Country | Link |
---|---|
US (1) | US20030219176A1 (de) |
EP (1) | EP1367000A3 (de) |
CA (1) | CA2428942A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1541480A1 (de) * | 2003-12-08 | 2005-06-15 | Kraft Foods Holdings, Inc. | Flexible Verpackung mit Schutzhülle |
US8122687B2 (en) | 2003-07-31 | 2012-02-28 | Kraft Foods Global Brands Llc | Method of making flexible packages having slide closures |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6769229B2 (en) * | 2001-08-30 | 2004-08-03 | Kraft Foods Holdings, Inc. | Method for manufacturing flexible packages having slide closures |
US7052181B2 (en) * | 2003-06-11 | 2006-05-30 | S.C. Johnson Home Storage, Inc. | Zippered bag having a pair of fastener strips |
US20050194282A1 (en) * | 2004-03-08 | 2005-09-08 | Curwood, Inc. | Reclosable thermoformed flexible packages and method of making same |
US7364362B2 (en) * | 2004-06-17 | 2008-04-29 | Illinois Tool Works Inc. | Header end tack seal for reclosable package |
US8408793B2 (en) | 2006-08-08 | 2013-04-02 | Kellogg Company | Flexible container for pourable product |
US7621105B2 (en) * | 2006-08-23 | 2009-11-24 | Illinois Tool Works Inc. | Method of producing high burst zipper assemblies for large reclosable packages |
US20090129707A1 (en) * | 2007-11-15 | 2009-05-21 | Illinois Tool Works Inc. | Reclosable package with zipper and slider in the fin seal |
US10427851B2 (en) * | 2010-12-30 | 2019-10-01 | Mark Steele | Package with heat score |
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-
2002
- 2002-05-23 US US10/155,401 patent/US20030219176A1/en not_active Abandoned
-
2003
- 2003-05-20 EP EP03253141A patent/EP1367000A3/de not_active Withdrawn
- 2003-05-20 CA CA002428942A patent/CA2428942A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5713669A (en) * | 1996-12-05 | 1998-02-03 | Tenneco Packaging | Plastic bag with zipper slider captured in pocket |
US20010017950A1 (en) * | 1999-05-11 | 2001-08-30 | Sargento. Foods Inc. | Resealable bag for filling with food product (s) and method |
US20010039235A1 (en) * | 1999-11-10 | 2001-11-08 | Buchman James E. | Methods of manufacturing reclosable package having a slider device |
WO2001053158A2 (en) * | 2000-01-18 | 2001-07-26 | Reynolds Consumer Products, Inc. | Reclosable package having slider device and tamper-evident structure |
US20020037115A1 (en) * | 2000-09-22 | 2002-03-28 | Kraft Foods Holdings, Inc. | Fastener closure arrangement for flexible packages |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8122687B2 (en) | 2003-07-31 | 2012-02-28 | Kraft Foods Global Brands Llc | Method of making flexible packages having slide closures |
EP1541480A1 (de) * | 2003-12-08 | 2005-06-15 | Kraft Foods Holdings, Inc. | Flexible Verpackung mit Schutzhülle |
Also Published As
Publication number | Publication date |
---|---|
EP1367000A3 (de) | 2004-01-14 |
US20030219176A1 (en) | 2003-11-27 |
CA2428942A1 (en) | 2003-11-23 |
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